From patchwork Thu Sep 12 09:16:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142637 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C936A1599 for ; Thu, 12 Sep 2019 09:23:19 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id AA3982084F for ; Thu, 12 Sep 2019 09:23:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AA3982084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59698 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LJu-0007s1-HG for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:23:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42327) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEC-0001nZ-L6 for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEB-0005YW-MP for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32832) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LE9-0005WZ-JV; Thu, 12 Sep 2019 05:17:21 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DB29D88134F; Thu, 12 Sep 2019 09:17:20 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id A6D6A1C92A; Thu, 12 Sep 2019 09:17:17 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:16:59 +0300 Message-Id: <20190912091710.21449-2-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.69]); Thu, 12 Sep 2019 09:17:20 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 01/12] block-crypto: misc refactoring X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" * rename the write_func to create_write_func, and init_func to create_init_func this is preparation for other write_func that will be used to update the encryption keys. No functional changes Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- block/crypto.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/block/crypto.c b/block/crypto.c index 7eb698774e..6e822c6e50 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -78,7 +78,7 @@ struct BlockCryptoCreateData { }; -static ssize_t block_crypto_write_func(QCryptoBlock *block, +static ssize_t block_crypto_create_write_func(QCryptoBlock *block, size_t offset, const uint8_t *buf, size_t buflen, @@ -96,8 +96,7 @@ static ssize_t block_crypto_write_func(QCryptoBlock *block, return ret; } - -static ssize_t block_crypto_init_func(QCryptoBlock *block, +static ssize_t block_crypto_create_init_func(QCryptoBlock *block, size_t headerlen, void *opaque, Error **errp) @@ -109,7 +108,8 @@ static ssize_t block_crypto_init_func(QCryptoBlock *block, return -EFBIG; } - /* User provided size should reflect amount of space made + /* + * User provided size should reflect amount of space made * available to the guest, so we must take account of that * which will be used by the crypto header */ @@ -279,8 +279,8 @@ static int block_crypto_co_create_generic(BlockDriverState *bs, }; crypto = qcrypto_block_create(opts, NULL, - block_crypto_init_func, - block_crypto_write_func, + block_crypto_create_init_func, + block_crypto_create_write_func, &data, errp); From patchwork Thu Sep 12 09:17:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142641 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 03C611599 for ; Thu, 12 Sep 2019 09:26:33 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C6FD02084F for ; Thu, 12 Sep 2019 09:26:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C6FD02084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59738 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LN1-0002yI-CG for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:26:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42364) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEH-0001r2-Kr for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEF-0005bB-Ez for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36790) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEB-0005Y0-Ca; Thu, 12 Sep 2019 05:17:23 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id AD355307D853; Thu, 12 Sep 2019 09:17:22 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4126F451D; Thu, 12 Sep 2019 09:17:20 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:00 +0300 Message-Id: <20190912091710.21449-3-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Thu, 12 Sep 2019 09:17:22 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 02/12] qcrypto-luks: rename some fields in QCryptoBlockLUKSHeader X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" * key_bytes -> master_key_len * payload_offset = payload_offset_sector (to emphasise that this isn't byte offset) * key_offset -> key_offset_sector - same as above for luks slots Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 91 +++++++++++++++++++++++---------------------- 1 file changed, 47 insertions(+), 44 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index 743949adbf..f12fa2d270 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -143,7 +143,7 @@ struct QCryptoBlockLUKSKeySlot { /* salt for PBKDF2 */ uint8_t salt[QCRYPTO_BLOCK_LUKS_SALT_LEN]; /* start sector of key material */ - uint32_t key_offset; + uint32_t key_offset_sector; /* number of anti-forensic stripes */ uint32_t stripes; }; @@ -172,10 +172,10 @@ struct QCryptoBlockLUKSHeader { char hash_spec[QCRYPTO_BLOCK_LUKS_HASH_SPEC_LEN]; /* start offset of the volume data (in 512 byte sectors) */ - uint32_t payload_offset; + uint32_t payload_offset_sector; /* Number of key bytes */ - uint32_t key_bytes; + uint32_t master_key_len; /* master key checksum after PBKDF2 */ uint8_t master_key_digest[QCRYPTO_BLOCK_LUKS_DIGEST_LEN]; @@ -466,7 +466,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, * then encrypted. */ rv = readfunc(block, - slot->key_offset * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, + slot->key_offset_sector * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, splitkey, splitkeylen, opaque, errp); @@ -584,8 +584,8 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, size_t i; int rv; - *masterkey = g_new0(uint8_t, luks->header.key_bytes); - *masterkeylen = luks->header.key_bytes; + *masterkey = g_new0(uint8_t, luks->header.master_key_len); + *masterkeylen = luks->header.master_key_len; for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { rv = qcrypto_block_luks_load_key(block, @@ -677,14 +677,14 @@ qcrypto_block_luks_open(QCryptoBlock *block, /* The header is always stored in big-endian format, so * convert everything to native */ be16_to_cpus(&luks->header.version); - be32_to_cpus(&luks->header.payload_offset); - be32_to_cpus(&luks->header.key_bytes); + be32_to_cpus(&luks->header.payload_offset_sector); + be32_to_cpus(&luks->header.master_key_len); be32_to_cpus(&luks->header.master_key_iterations); for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { be32_to_cpus(&luks->header.key_slots[i].active); be32_to_cpus(&luks->header.key_slots[i].iterations); - be32_to_cpus(&luks->header.key_slots[i].key_offset); + be32_to_cpus(&luks->header.key_slots[i].key_offset_sector); be32_to_cpus(&luks->header.key_slots[i].stripes); } @@ -743,10 +743,11 @@ qcrypto_block_luks_open(QCryptoBlock *block, goto fail; } - cipheralg = qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name, - ciphermode, - luks->header.key_bytes, - &local_err); + cipheralg = + qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name, + ciphermode, + luks->header.master_key_len, + &local_err); if (local_err) { ret = -ENOTSUP; error_propagate(errp, local_err); @@ -838,7 +839,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, } block->sector_size = QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; - block->payload_offset = luks->header.payload_offset * + block->payload_offset = luks->header.payload_offset_sector * block->sector_size; luks->cipher_alg = cipheralg; @@ -993,9 +994,11 @@ qcrypto_block_luks_create(QCryptoBlock *block, strcpy(luks->header.cipher_mode, cipher_mode_spec); strcpy(luks->header.hash_spec, hash_alg); - luks->header.key_bytes = qcrypto_cipher_get_key_len(luks_opts.cipher_alg); + luks->header.master_key_len = + qcrypto_cipher_get_key_len(luks_opts.cipher_alg); + if (luks_opts.cipher_mode == QCRYPTO_CIPHER_MODE_XTS) { - luks->header.key_bytes *= 2; + luks->header.master_key_len *= 2; } /* Generate the salt used for hashing the master key @@ -1008,9 +1011,9 @@ qcrypto_block_luks_create(QCryptoBlock *block, } /* Generate random master key */ - masterkey = g_new0(uint8_t, luks->header.key_bytes); + masterkey = g_new0(uint8_t, luks->header.master_key_len); if (qcrypto_random_bytes(masterkey, - luks->header.key_bytes, errp) < 0) { + luks->header.master_key_len, errp) < 0) { goto error; } @@ -1018,7 +1021,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* Setup the block device payload encryption objects */ if (qcrypto_block_init_cipher(block, luks_opts.cipher_alg, luks_opts.cipher_mode, masterkey, - luks->header.key_bytes, 1, errp) < 0) { + luks->header.master_key_len, 1, errp) < 0) { goto error; } @@ -1028,7 +1031,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, block->ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg, ivcipheralg, luks_opts.ivgen_hash_alg, - masterkey, luks->header.key_bytes, + masterkey, luks->header.master_key_len, errp); if (!block->ivgen) { @@ -1040,7 +1043,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, * key, in order to have 1 second of compute time used */ iters = qcrypto_pbkdf2_count_iters(luks_opts.hash_alg, - masterkey, luks->header.key_bytes, + masterkey, luks->header.master_key_len, luks->header.master_key_salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, QCRYPTO_BLOCK_LUKS_DIGEST_LEN, @@ -1080,7 +1083,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, * valid master key */ if (qcrypto_pbkdf2(luks_opts.hash_alg, - masterkey, luks->header.key_bytes, + masterkey, luks->header.master_key_len, luks->header.master_key_salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, luks->header.master_key_iterations, @@ -1093,7 +1096,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* Although LUKS has multiple key slots, we're just going * to use the first key slot */ - splitkeylen = luks->header.key_bytes * QCRYPTO_BLOCK_LUKS_STRIPES; + splitkeylen = luks->header.master_key_len * QCRYPTO_BLOCK_LUKS_STRIPES; for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { luks->header.key_slots[i].active = i == 0 ? QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED : @@ -1103,7 +1106,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* This calculation doesn't match that shown in the spec, * but instead follows the cryptsetup implementation. */ - luks->header.key_slots[i].key_offset = + luks->header.key_slots[i].key_offset_sector = (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / QCRYPTO_BLOCK_LUKS_SECTOR_SIZE) + (ROUND_UP(DIV_ROUND_UP(splitkeylen, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE), @@ -1124,7 +1127,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, (uint8_t *)password, strlen(password), luks->header.key_slots[0].salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, - luks->header.key_bytes, + luks->header.master_key_len, &local_err); if (local_err) { error_propagate(errp, local_err); @@ -1155,13 +1158,13 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* Generate a key that we'll use to encrypt the master * key, from the user's password */ - slotkey = g_new0(uint8_t, luks->header.key_bytes); + slotkey = g_new0(uint8_t, luks->header.master_key_len); if (qcrypto_pbkdf2(luks_opts.hash_alg, (uint8_t *)password, strlen(password), luks->header.key_slots[0].salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, luks->header.key_slots[0].iterations, - slotkey, luks->header.key_bytes, + slotkey, luks->header.master_key_len, errp) < 0) { goto error; } @@ -1172,7 +1175,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, */ cipher = qcrypto_cipher_new(luks_opts.cipher_alg, luks_opts.cipher_mode, - slotkey, luks->header.key_bytes, + slotkey, luks->header.master_key_len, errp); if (!cipher) { goto error; @@ -1181,7 +1184,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg, ivcipheralg, luks_opts.ivgen_hash_alg, - slotkey, luks->header.key_bytes, + slotkey, luks->header.master_key_len, errp); if (!ivgen) { goto error; @@ -1193,7 +1196,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, splitkey = g_new0(uint8_t, splitkeylen); if (qcrypto_afsplit_encode(luks_opts.hash_alg, - luks->header.key_bytes, + luks->header.master_key_len, luks->header.key_slots[0].stripes, masterkey, splitkey, @@ -1217,7 +1220,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, * slot headers, rounded up to the nearest sector, combined with * the size of each master key material region, also rounded up * to the nearest sector */ - luks->header.payload_offset = + luks->header.payload_offset_sector = (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / QCRYPTO_BLOCK_LUKS_SECTOR_SIZE) + (ROUND_UP(DIV_ROUND_UP(splitkeylen, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE), @@ -1226,7 +1229,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS); block->sector_size = QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; - block->payload_offset = luks->header.payload_offset * + block->payload_offset = luks->header.payload_offset_sector * block->sector_size; /* Reserve header space to match payload offset */ @@ -1239,14 +1242,14 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* Everything on disk uses Big Endian, so flip header fields * before writing them */ cpu_to_be16s(&luks->header.version); - cpu_to_be32s(&luks->header.payload_offset); - cpu_to_be32s(&luks->header.key_bytes); + cpu_to_be32s(&luks->header.payload_offset_sector); + cpu_to_be32s(&luks->header.master_key_len); cpu_to_be32s(&luks->header.master_key_iterations); for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { cpu_to_be32s(&luks->header.key_slots[i].active); cpu_to_be32s(&luks->header.key_slots[i].iterations); - cpu_to_be32s(&luks->header.key_slots[i].key_offset); + cpu_to_be32s(&luks->header.key_slots[i].key_offset_sector); cpu_to_be32s(&luks->header.key_slots[i].stripes); } @@ -1263,14 +1266,14 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* Byte swap the header back to native, in case we need * to read it again later */ be16_to_cpus(&luks->header.version); - be32_to_cpus(&luks->header.payload_offset); - be32_to_cpus(&luks->header.key_bytes); + be32_to_cpus(&luks->header.payload_offset_sector); + be32_to_cpus(&luks->header.master_key_len); be32_to_cpus(&luks->header.master_key_iterations); for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { be32_to_cpus(&luks->header.key_slots[i].active); be32_to_cpus(&luks->header.key_slots[i].iterations); - be32_to_cpus(&luks->header.key_slots[i].key_offset); + be32_to_cpus(&luks->header.key_slots[i].key_offset_sector); be32_to_cpus(&luks->header.key_slots[i].stripes); } @@ -1282,7 +1285,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, /* Write out the master key material, starting at the * sector immediately following the partition header. */ if (writefunc(block, - luks->header.key_slots[0].key_offset * + luks->header.key_slots[0].key_offset_sector * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, splitkey, splitkeylen, opaque, @@ -1296,17 +1299,17 @@ qcrypto_block_luks_create(QCryptoBlock *block, luks->ivgen_hash_alg = luks_opts.ivgen_hash_alg; luks->hash_alg = luks_opts.hash_alg; - memset(masterkey, 0, luks->header.key_bytes); - memset(slotkey, 0, luks->header.key_bytes); + memset(masterkey, 0, luks->header.master_key_len); + memset(slotkey, 0, luks->header.master_key_len); return 0; error: if (masterkey) { - memset(masterkey, 0, luks->header.key_bytes); + memset(masterkey, 0, luks->header.master_key_len); } if (slotkey) { - memset(slotkey, 0, luks->header.key_bytes); + memset(slotkey, 0, luks->header.master_key_len); } qcrypto_block_free_cipher(block); @@ -1346,7 +1349,7 @@ static int qcrypto_block_luks_get_info(QCryptoBlock *block, slots->value = slot = g_new0(QCryptoBlockInfoLUKSSlot, 1); slot->active = luks->header.key_slots[i].active == QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED; - slot->key_offset = luks->header.key_slots[i].key_offset + slot->key_offset = luks->header.key_slots[i].key_offset_sector * QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; if (slot->active) { slot->has_iters = true; From patchwork Thu Sep 12 09:17:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142647 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C1ED2924 for ; Thu, 12 Sep 2019 09:28:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A20AE2084F for ; Thu, 12 Sep 2019 09:28:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A20AE2084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59770 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LPO-0005sI-Gq for patchwork-qemu-devel@patchwork.kernel.org; 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Thu, 12 Sep 2019 09:17:22 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:01 +0300 Message-Id: <20190912091710.21449-4-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Thu, 12 Sep 2019 09:17:25 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 03/12] qcrypto-luks: don't overwrite cipher_mode in header X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This way we can store the header we loaded, which will be used in key management code Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index f12fa2d270..25f8a9f1c4 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -645,6 +645,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, QCryptoHashAlgorithm hash; QCryptoHashAlgorithm ivhash; g_autofree char *password = NULL; + g_autofree char *cipher_mode = NULL; if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) { if (!options->u.luks.key_secret) { @@ -701,6 +702,8 @@ qcrypto_block_luks_open(QCryptoBlock *block, goto fail; } + cipher_mode = g_strdup(luks->header.cipher_mode); + /* * The cipher_mode header contains a string that we have * to further parse, of the format @@ -709,11 +712,11 @@ qcrypto_block_luks_open(QCryptoBlock *block, * * eg cbc-essiv:sha256, cbc-plain64 */ - ivgen_name = strchr(luks->header.cipher_mode, '-'); + ivgen_name = strchr(cipher_mode, '-'); if (!ivgen_name) { ret = -EINVAL; error_setg(errp, "Unexpected cipher mode string format %s", - luks->header.cipher_mode); + cipher_mode); goto fail; } *ivgen_name = '\0'; @@ -735,7 +738,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, } } - ciphermode = qcrypto_block_luks_cipher_mode_lookup(luks->header.cipher_mode, + ciphermode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, &local_err); if (local_err) { ret = -ENOTSUP; From patchwork Thu Sep 12 09:17:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142629 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC66D924 for ; Thu, 12 Sep 2019 09:19:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9A9B320663 for ; Thu, 12 Sep 2019 09:19:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9A9B320663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59656 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LGN-0003rv-3K for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:19:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42433) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEO-0001uA-GY for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEM-0005hJ-Fy for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:55188) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEH-0005bU-IG; Thu, 12 Sep 2019 05:17:29 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id DB2A610CC1E0; Thu, 12 Sep 2019 09:17:27 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id A4DFC166A0; Thu, 12 Sep 2019 09:17:25 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:02 +0300 Message-Id: <20190912091710.21449-5-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.65]); Thu, 12 Sep 2019 09:17:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 04/12] qcrypto-luks: simplify masterkey and masterkey length X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Let the caller allocate masterkey Always use master key len from the header Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 44 +++++++++++++++++++++----------------------- 1 file changed, 21 insertions(+), 23 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index 25f8a9f1c4..9e59a791a6 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -419,7 +419,6 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, QCryptoCipherAlgorithm ivcipheralg, QCryptoHashAlgorithm ivhash, uint8_t *masterkey, - size_t masterkeylen, QCryptoBlockReadFunc readfunc, void *opaque, Error **errp) @@ -438,9 +437,9 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, return 0; } - splitkeylen = masterkeylen * slot->stripes; + splitkeylen = luks->header.master_key_len * slot->stripes; splitkey = g_new0(uint8_t, splitkeylen); - possiblekey = g_new0(uint8_t, masterkeylen); + possiblekey = g_new0(uint8_t, luks->header.master_key_len); /* * The user password is used to generate a (possible) @@ -453,7 +452,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, (const uint8_t *)password, strlen(password), slot->salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, slot->iterations, - possiblekey, masterkeylen, + possiblekey, luks->header.master_key_len, errp) < 0) { return -1; } @@ -478,7 +477,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, /* Setup the cipher/ivgen that we'll use to try to decrypt * the split master key material */ cipher = qcrypto_cipher_new(cipheralg, ciphermode, - possiblekey, masterkeylen, + possiblekey, luks->header.master_key_len, errp); if (!cipher) { return -1; @@ -489,7 +488,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, ivgen = qcrypto_ivgen_new(ivalg, ivcipheralg, ivhash, - possiblekey, masterkeylen, + possiblekey, luks->header.master_key_len, errp); if (!ivgen) { return -1; @@ -519,7 +518,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, * it back together to get the actual master key. */ if (qcrypto_afsplit_decode(hash, - masterkeylen, + luks->header.master_key_len, slot->stripes, splitkey, masterkey, @@ -537,11 +536,13 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, * header */ if (qcrypto_pbkdf2(hash, - masterkey, masterkeylen, + masterkey, + luks->header.master_key_len, luks->header.master_key_salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, luks->header.master_key_iterations, - keydigest, G_N_ELEMENTS(keydigest), + keydigest, + G_N_ELEMENTS(keydigest), errp) < 0) { return -1; } @@ -574,8 +575,7 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, QCryptoIVGenAlgorithm ivalg, QCryptoCipherAlgorithm ivcipheralg, QCryptoHashAlgorithm ivhash, - uint8_t **masterkey, - size_t *masterkeylen, + uint8_t *masterkey, QCryptoBlockReadFunc readfunc, void *opaque, Error **errp) @@ -584,9 +584,6 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, size_t i; int rv; - *masterkey = g_new0(uint8_t, luks->header.master_key_len); - *masterkeylen = luks->header.master_key_len; - for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { rv = qcrypto_block_luks_load_key(block, &luks->header.key_slots[i], @@ -597,8 +594,7 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, ivalg, ivcipheralg, ivhash, - *masterkey, - *masterkeylen, + masterkey, readfunc, opaque, errp); @@ -613,9 +609,6 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, error_setg(errp, "Invalid password, cannot unlock any keyslot"); error: - g_free(*masterkey); - *masterkey = NULL; - *masterkeylen = 0; return -1; } @@ -636,7 +629,6 @@ qcrypto_block_luks_open(QCryptoBlock *block, size_t i; ssize_t rv; g_autofree uint8_t *masterkey = NULL; - size_t masterkeylen; char *ivgen_name, *ivhash_name; QCryptoCipherMode ciphermode; QCryptoCipherAlgorithm cipheralg; @@ -802,6 +794,9 @@ qcrypto_block_luks_open(QCryptoBlock *block, /* Try to find which key slot our password is valid for * and unlock the master key from that slot. */ + + masterkey = g_new0(uint8_t, luks->header.master_key_len); + if (qcrypto_block_luks_find_key(block, password, cipheralg, ciphermode, @@ -809,7 +804,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, ivalg, ivcipheralg, ivhash, - &masterkey, &masterkeylen, + masterkey, readfunc, opaque, errp) < 0) { ret = -EACCES; @@ -825,7 +820,8 @@ qcrypto_block_luks_open(QCryptoBlock *block, block->ivgen = qcrypto_ivgen_new(ivalg, ivcipheralg, ivhash, - masterkey, masterkeylen, + masterkey, + luks->header.master_key_len, errp); if (!block->ivgen) { ret = -ENOTSUP; @@ -833,7 +829,9 @@ qcrypto_block_luks_open(QCryptoBlock *block, } ret = qcrypto_block_init_cipher(block, cipheralg, ciphermode, - masterkey, masterkeylen, n_threads, + masterkey, + luks->header.master_key_len, + n_threads, errp); if (ret < 0) { ret = -ENOTSUP; From patchwork Thu Sep 12 09:17:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142631 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4D54C1599 for ; Thu, 12 Sep 2019 09:19:51 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2AD2220663 for ; Thu, 12 Sep 2019 09:19:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2AD2220663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59658 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LGX-00045x-FM for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:19:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42432) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEO-0001u8-GT for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEM-0005hO-G9 for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32858) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEJ-0005d9-LH; Thu, 12 Sep 2019 05:17:31 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 760E88A1C83; Thu, 12 Sep 2019 09:17:30 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 40C05166A5; Thu, 12 Sep 2019 09:17:28 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:03 +0300 Message-Id: <20190912091710.21449-6-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.69]); Thu, 12 Sep 2019 09:17:30 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 05/12] qcrypto-luks: pass keyslot index rather that pointer to the keyslot X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Another minor refactoring Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index 9e59a791a6..b759cc8d19 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -410,7 +410,7 @@ qcrypto_block_luks_essiv_cipher(QCryptoCipherAlgorithm cipher, */ static int qcrypto_block_luks_load_key(QCryptoBlock *block, - QCryptoBlockLUKSKeySlot *slot, + size_t slot_idx, const char *password, QCryptoCipherAlgorithm cipheralg, QCryptoCipherMode ciphermode, @@ -424,6 +424,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, Error **errp) { QCryptoBlockLUKS *luks = block->opaque; + const QCryptoBlockLUKSKeySlot *slot = &luks->header.key_slots[slot_idx]; g_autofree uint8_t *splitkey = NULL; size_t splitkeylen; g_autofree uint8_t *possiblekey = NULL; @@ -580,13 +581,12 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, void *opaque, Error **errp) { - QCryptoBlockLUKS *luks = block->opaque; size_t i; int rv; for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { rv = qcrypto_block_luks_load_key(block, - &luks->header.key_slots[i], + i, password, cipheralg, ciphermode, From patchwork Thu Sep 12 09:17:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142635 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 34AED924 for ; Thu, 12 Sep 2019 09:21:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 05EA82084F for ; Thu, 12 Sep 2019 09:21:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 05EA82084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59664 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LIC-0005lw-Al for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:21:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42494) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEV-00020Q-CO for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LET-0005p4-EC for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59418) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEO-0005ig-Cu; Thu, 12 Sep 2019 05:17:36 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 877C418C4274; Thu, 12 Sep 2019 09:17:35 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id D0192166A0; Thu, 12 Sep 2019 09:17:30 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:04 +0300 Message-Id: <20190912091710.21449-7-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.62]); Thu, 12 Sep 2019 09:17:35 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 06/12] qcrypto-luks: use the parsed encryption settings in QCryptoBlockLUKS X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Prior to that patch, the parsed encryption settings were already stored into the QCryptoBlockLUKS but not used anywhere but in qcrypto_block_luks_get_info Using them simplifies the code Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 169 +++++++++++++++++++++----------------------- 1 file changed, 79 insertions(+), 90 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index b759cc8d19..f3bfc921b2 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -199,13 +199,25 @@ QEMU_BUILD_BUG_ON(sizeof(struct QCryptoBlockLUKSHeader) != 592); struct QCryptoBlockLUKS { QCryptoBlockLUKSHeader header; - /* Cache parsed versions of what's in header fields, - * as we can't rely on QCryptoBlock.cipher being - * non-NULL */ + /* Main encryption algorithm used for encryption*/ QCryptoCipherAlgorithm cipher_alg; + + /* Mode of encryption for the selected encryption algorithm */ QCryptoCipherMode cipher_mode; + + /* Initialization vector generation algorithm */ QCryptoIVGenAlgorithm ivgen_alg; + + /* Hash algorithm used for IV generation*/ QCryptoHashAlgorithm ivgen_hash_alg; + + /* + * Encryption algorithm used for IV generation. + * Usually the same as main encryption algorithm + */ + QCryptoCipherAlgorithm ivgen_cipher_alg; + + /* Hash algorithm used in pbkdf2 function */ QCryptoHashAlgorithm hash_alg; }; @@ -412,12 +424,6 @@ static int qcrypto_block_luks_load_key(QCryptoBlock *block, size_t slot_idx, const char *password, - QCryptoCipherAlgorithm cipheralg, - QCryptoCipherMode ciphermode, - QCryptoHashAlgorithm hash, - QCryptoIVGenAlgorithm ivalg, - QCryptoCipherAlgorithm ivcipheralg, - QCryptoHashAlgorithm ivhash, uint8_t *masterkey, QCryptoBlockReadFunc readfunc, void *opaque, @@ -449,7 +455,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, * the key is correct and validate the results of * decryption later. */ - if (qcrypto_pbkdf2(hash, + if (qcrypto_pbkdf2(luks->hash_alg, (const uint8_t *)password, strlen(password), slot->salt, QCRYPTO_BLOCK_LUKS_SALT_LEN, slot->iterations, @@ -477,19 +483,23 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, /* Setup the cipher/ivgen that we'll use to try to decrypt * the split master key material */ - cipher = qcrypto_cipher_new(cipheralg, ciphermode, - possiblekey, luks->header.master_key_len, + cipher = qcrypto_cipher_new(luks->cipher_alg, + luks->cipher_mode, + possiblekey, + luks->header.master_key_len, errp); if (!cipher) { return -1; } - niv = qcrypto_cipher_get_iv_len(cipheralg, - ciphermode); - ivgen = qcrypto_ivgen_new(ivalg, - ivcipheralg, - ivhash, - possiblekey, luks->header.master_key_len, + niv = qcrypto_cipher_get_iv_len(luks->cipher_alg, + luks->cipher_mode); + + ivgen = qcrypto_ivgen_new(luks->ivgen_alg, + luks->ivgen_cipher_alg, + luks->ivgen_hash_alg, + possiblekey, + luks->header.master_key_len, errp); if (!ivgen) { return -1; @@ -518,7 +528,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, * Now we've decrypted the split master key, join * it back together to get the actual master key. */ - if (qcrypto_afsplit_decode(hash, + if (qcrypto_afsplit_decode(luks->hash_alg, luks->header.master_key_len, slot->stripes, splitkey, @@ -536,7 +546,7 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, * then comparing that to the hash stored in the key slot * header */ - if (qcrypto_pbkdf2(hash, + if (qcrypto_pbkdf2(luks->hash_alg, masterkey, luks->header.master_key_len, luks->header.master_key_salt, @@ -570,12 +580,6 @@ qcrypto_block_luks_load_key(QCryptoBlock *block, static int qcrypto_block_luks_find_key(QCryptoBlock *block, const char *password, - QCryptoCipherAlgorithm cipheralg, - QCryptoCipherMode ciphermode, - QCryptoHashAlgorithm hash, - QCryptoIVGenAlgorithm ivalg, - QCryptoCipherAlgorithm ivcipheralg, - QCryptoHashAlgorithm ivhash, uint8_t *masterkey, QCryptoBlockReadFunc readfunc, void *opaque, @@ -588,12 +592,6 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, rv = qcrypto_block_luks_load_key(block, i, password, - cipheralg, - ciphermode, - hash, - ivalg, - ivcipheralg, - ivhash, masterkey, readfunc, opaque, @@ -607,7 +605,6 @@ qcrypto_block_luks_find_key(QCryptoBlock *block, } error_setg(errp, "Invalid password, cannot unlock any keyslot"); - error: return -1; } @@ -623,19 +620,13 @@ qcrypto_block_luks_open(QCryptoBlock *block, size_t n_threads, Error **errp) { - QCryptoBlockLUKS *luks; + QCryptoBlockLUKS *luks = NULL; Error *local_err = NULL; int ret = 0; size_t i; ssize_t rv; g_autofree uint8_t *masterkey = NULL; char *ivgen_name, *ivhash_name; - QCryptoCipherMode ciphermode; - QCryptoCipherAlgorithm cipheralg; - QCryptoIVGenAlgorithm ivalg; - QCryptoCipherAlgorithm ivcipheralg; - QCryptoHashAlgorithm hash; - QCryptoHashAlgorithm ivhash; g_autofree char *password = NULL; g_autofree char *cipher_mode = NULL; @@ -716,13 +707,13 @@ qcrypto_block_luks_open(QCryptoBlock *block, ivhash_name = strchr(ivgen_name, ':'); if (!ivhash_name) { - ivhash = 0; + luks->ivgen_hash_alg = 0; } else { *ivhash_name = '\0'; ivhash_name++; - ivhash = qcrypto_block_luks_hash_name_lookup(ivhash_name, - &local_err); + luks->ivgen_hash_alg = qcrypto_block_luks_hash_name_lookup(ivhash_name, + &local_err); if (local_err) { ret = -ENOTSUP; error_propagate(errp, local_err); @@ -730,17 +721,17 @@ qcrypto_block_luks_open(QCryptoBlock *block, } } - ciphermode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, - &local_err); + luks->cipher_mode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, + &local_err); if (local_err) { ret = -ENOTSUP; error_propagate(errp, local_err); goto fail; } - cipheralg = + luks->cipher_alg = qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name, - ciphermode, + luks->cipher_mode, luks->header.master_key_len, &local_err); if (local_err) { @@ -749,31 +740,33 @@ qcrypto_block_luks_open(QCryptoBlock *block, goto fail; } - hash = qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec, - &local_err); + luks->hash_alg = + qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec, + &local_err); if (local_err) { ret = -ENOTSUP; error_propagate(errp, local_err); goto fail; } - ivalg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name, - &local_err); + luks->ivgen_alg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name, + &local_err); if (local_err) { ret = -ENOTSUP; error_propagate(errp, local_err); goto fail; } - if (ivalg == QCRYPTO_IVGEN_ALG_ESSIV) { + if (luks->ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { if (!ivhash_name) { ret = -EINVAL; error_setg(errp, "Missing IV generator hash specification"); goto fail; } - ivcipheralg = qcrypto_block_luks_essiv_cipher(cipheralg, - ivhash, - &local_err); + luks->ivgen_cipher_alg = + qcrypto_block_luks_essiv_cipher(luks->cipher_alg, + luks->ivgen_hash_alg, + &local_err); if (local_err) { ret = -ENOTSUP; error_propagate(errp, local_err); @@ -787,7 +780,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, * ignore hash names with these ivgens rather than report * an error about the invalid usage */ - ivcipheralg = cipheralg; + luks->ivgen_cipher_alg = luks->cipher_alg; } if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) { @@ -799,11 +792,6 @@ qcrypto_block_luks_open(QCryptoBlock *block, if (qcrypto_block_luks_find_key(block, password, - cipheralg, ciphermode, - hash, - ivalg, - ivcipheralg, - ivhash, masterkey, readfunc, opaque, errp) < 0) { @@ -814,12 +802,13 @@ qcrypto_block_luks_open(QCryptoBlock *block, /* We have a valid master key now, so can setup the * block device payload decryption objects */ - block->kdfhash = hash; - block->niv = qcrypto_cipher_get_iv_len(cipheralg, - ciphermode); - block->ivgen = qcrypto_ivgen_new(ivalg, - ivcipheralg, - ivhash, + block->kdfhash = luks->hash_alg; + block->niv = qcrypto_cipher_get_iv_len(luks->cipher_alg, + luks->cipher_mode); + + block->ivgen = qcrypto_ivgen_new(luks->ivgen_alg, + luks->ivgen_cipher_alg, + luks->ivgen_hash_alg, masterkey, luks->header.master_key_len, errp); @@ -828,7 +817,9 @@ qcrypto_block_luks_open(QCryptoBlock *block, goto fail; } - ret = qcrypto_block_init_cipher(block, cipheralg, ciphermode, + ret = qcrypto_block_init_cipher(block, + luks->cipher_alg, + luks->cipher_mode, masterkey, luks->header.master_key_len, n_threads, @@ -843,11 +834,6 @@ qcrypto_block_luks_open(QCryptoBlock *block, block->payload_offset = luks->header.payload_offset_sector * block->sector_size; - luks->cipher_alg = cipheralg; - luks->cipher_mode = ciphermode; - luks->ivgen_alg = ivalg; - luks->ivgen_hash_alg = ivhash; - luks->hash_alg = hash; return 0; @@ -893,7 +879,6 @@ qcrypto_block_luks_create(QCryptoBlock *block, const char *ivgen_hash_alg = NULL; const char *hash_alg; g_autofree char *cipher_mode_spec = NULL; - QCryptoCipherAlgorithm ivcipheralg = 0; uint64_t iters; memcpy(&luks_opts, &options->u.luks, sizeof(luks_opts)); @@ -918,6 +903,17 @@ qcrypto_block_luks_create(QCryptoBlock *block, luks_opts.has_ivgen_hash_alg = true; } } + + luks = g_new0(QCryptoBlockLUKS, 1); + block->opaque = luks; + + luks->cipher_alg = luks_opts.cipher_alg; + luks->cipher_mode = luks_opts.cipher_mode; + luks->ivgen_alg = luks_opts.ivgen_alg; + luks->ivgen_hash_alg = luks_opts.ivgen_hash_alg; + luks->hash_alg = luks_opts.hash_alg; + + /* Note we're allowing ivgen_hash_alg to be set even for * non-essiv iv generators that don't need a hash. It will * be silently ignored, for compatibility with dm-crypt */ @@ -925,15 +921,13 @@ qcrypto_block_luks_create(QCryptoBlock *block, if (!options->u.luks.key_secret) { error_setg(errp, "Parameter '%skey-secret' is required for cipher", optprefix ? optprefix : ""); - return -1; + goto error; } password = qcrypto_secret_lookup_as_utf8(luks_opts.key_secret, errp); if (!password) { - return -1; + goto error; } - luks = g_new0(QCryptoBlockLUKS, 1); - block->opaque = luks; memcpy(luks->header.magic, qcrypto_block_luks_magic, QCRYPTO_BLOCK_LUKS_MAGIC_LEN); @@ -980,15 +974,16 @@ qcrypto_block_luks_create(QCryptoBlock *block, } if (luks_opts.ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { - ivcipheralg = qcrypto_block_luks_essiv_cipher(luks_opts.cipher_alg, - luks_opts.ivgen_hash_alg, - &local_err); + luks->ivgen_cipher_alg = + qcrypto_block_luks_essiv_cipher(luks_opts.cipher_alg, + luks_opts.ivgen_hash_alg, + &local_err); if (local_err) { error_propagate(errp, local_err); goto error; } } else { - ivcipheralg = luks_opts.cipher_alg; + luks->ivgen_cipher_alg = luks_opts.cipher_alg; } strcpy(luks->header.cipher_name, cipher_alg); @@ -1030,7 +1025,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, block->niv = qcrypto_cipher_get_iv_len(luks_opts.cipher_alg, luks_opts.cipher_mode); block->ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg, - ivcipheralg, + luks->ivgen_cipher_alg, luks_opts.ivgen_hash_alg, masterkey, luks->header.master_key_len, errp); @@ -1183,7 +1178,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, } ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg, - ivcipheralg, + luks->ivgen_cipher_alg, luks_opts.ivgen_hash_alg, slotkey, luks->header.master_key_len, errp); @@ -1294,12 +1289,6 @@ qcrypto_block_luks_create(QCryptoBlock *block, goto error; } - luks->cipher_alg = luks_opts.cipher_alg; - luks->cipher_mode = luks_opts.cipher_mode; - luks->ivgen_alg = luks_opts.ivgen_alg; - luks->ivgen_hash_alg = luks_opts.ivgen_hash_alg; - luks->hash_alg = luks_opts.hash_alg; - memset(masterkey, 0, luks->header.master_key_len); memset(slotkey, 0, luks->header.master_key_len); From patchwork Thu Sep 12 09:17:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142655 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7AC5E912 for ; Thu, 12 Sep 2019 09:32:50 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B43620830 for ; Thu, 12 Sep 2019 09:32:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B43620830 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59806 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LT7-0001Ht-0K for patchwork-qemu-devel@patchwork.kernel.org; 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Thu, 12 Sep 2019 09:17:35 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:05 +0300 Message-Id: <20190912091710.21449-8-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Thu, 12 Sep 2019 09:17:39 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 07/12] qcrypto-luks: purge unused error codes from open callback X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" These values are not used by generic crypto code anyway Signed-off-by: Maxim Levitsky --- crypto/block-luks.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index f3bfc921b2..ba63e9b442 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -675,13 +675,13 @@ qcrypto_block_luks_open(QCryptoBlock *block, if (memcmp(luks->header.magic, qcrypto_block_luks_magic, QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) { error_setg(errp, "Volume is not in LUKS format"); - ret = -EINVAL; + ret = -1; goto fail; } if (luks->header.version != QCRYPTO_BLOCK_LUKS_VERSION) { error_setg(errp, "LUKS version %" PRIu32 " is not supported", luks->header.version); - ret = -ENOTSUP; + ret = -1; goto fail; } @@ -697,7 +697,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, */ ivgen_name = strchr(cipher_mode, '-'); if (!ivgen_name) { - ret = -EINVAL; + ret = -1; error_setg(errp, "Unexpected cipher mode string format %s", cipher_mode); goto fail; @@ -715,7 +715,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks->ivgen_hash_alg = qcrypto_block_luks_hash_name_lookup(ivhash_name, &local_err); if (local_err) { - ret = -ENOTSUP; + ret = -1; error_propagate(errp, local_err); goto fail; } @@ -724,7 +724,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks->cipher_mode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, &local_err); if (local_err) { - ret = -ENOTSUP; + ret = -1; error_propagate(errp, local_err); goto fail; } @@ -735,7 +735,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks->header.master_key_len, &local_err); if (local_err) { - ret = -ENOTSUP; + ret = -1; error_propagate(errp, local_err); goto fail; } @@ -744,7 +744,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec, &local_err); if (local_err) { - ret = -ENOTSUP; + ret = -1; error_propagate(errp, local_err); goto fail; } @@ -752,14 +752,14 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks->ivgen_alg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name, &local_err); if (local_err) { - ret = -ENOTSUP; + ret = -1; error_propagate(errp, local_err); goto fail; } if (luks->ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { if (!ivhash_name) { - ret = -EINVAL; + ret = -1; error_setg(errp, "Missing IV generator hash specification"); goto fail; } @@ -768,7 +768,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks->ivgen_hash_alg, &local_err); if (local_err) { - ret = -ENOTSUP; + ret = -1; error_propagate(errp, local_err); goto fail; } @@ -795,7 +795,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, masterkey, readfunc, opaque, errp) < 0) { - ret = -EACCES; + ret = -1; goto fail; } @@ -813,7 +813,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks->header.master_key_len, errp); if (!block->ivgen) { - ret = -ENOTSUP; + ret = -1; goto fail; } @@ -825,7 +825,7 @@ qcrypto_block_luks_open(QCryptoBlock *block, n_threads, errp); if (ret < 0) { - ret = -ENOTSUP; + ret = -1; goto fail; } } From patchwork Thu Sep 12 09:17:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142639 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C46D71599 for ; Thu, 12 Sep 2019 09:23:33 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A52852084F for ; Thu, 12 Sep 2019 09:23:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A52852084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59704 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LK8-0008A5-M8 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:23:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42564) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEb-000277-TL for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEZ-0005ue-J4 for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40716) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEW-0005rr-7y; Thu, 12 Sep 2019 05:17:44 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 92FE3309B686; Thu, 12 Sep 2019 09:17:43 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id AE3531C92A; Thu, 12 Sep 2019 09:17:39 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:06 +0300 Message-Id: <20190912091710.21449-9-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Thu, 12 Sep 2019 09:17:43 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 08/12] qcrypto-luks: extract store and load header X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 158 ++++++++++++++++++++++++++------------------ 1 file changed, 94 insertions(+), 64 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index ba63e9b442..c3f3488222 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -409,6 +409,97 @@ qcrypto_block_luks_essiv_cipher(QCryptoCipherAlgorithm cipher, } } +/* + * Stores the main LUKS header, taking care of endianess + */ +static int +qcrypto_block_luks_store_header(QCryptoBlock *block, + QCryptoBlockWriteFunc writefunc, + void *opaque, + Error **errp) +{ + const QCryptoBlockLUKS *luks = block->opaque; + Error *local_err = NULL; + size_t i; + g_autofree QCryptoBlockLUKSHeader *hdr_copy = NULL; + + /* Create a copy of the header */ + hdr_copy = g_new0(QCryptoBlockLUKSHeader, 1); + memcpy(hdr_copy, &luks->header, sizeof(QCryptoBlockLUKSHeader)); + + /* + * Everything on disk uses Big Endian (tm), so flip header fields + * before writing them + */ + cpu_to_be16s(&hdr_copy->version); + cpu_to_be32s(&hdr_copy->payload_offset_sector); + cpu_to_be32s(&hdr_copy->master_key_len); + cpu_to_be32s(&hdr_copy->master_key_iterations); + + for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { + cpu_to_be32s(&hdr_copy->key_slots[i].active); + cpu_to_be32s(&hdr_copy->key_slots[i].iterations); + cpu_to_be32s(&hdr_copy->key_slots[i].key_offset_sector); + cpu_to_be32s(&hdr_copy->key_slots[i].stripes); + } + + /* Write out the partition header and key slot headers */ + writefunc(block, 0, (const uint8_t *)hdr_copy, sizeof(*hdr_copy), + opaque, &local_err); + + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + return 0; +} + +/* + * Loads the main LUKS header,and byteswaps it to native endianess + * And run basic sanity checks on it + */ +static int +qcrypto_block_luks_load_header(QCryptoBlock *block, + QCryptoBlockReadFunc readfunc, + void *opaque, + Error **errp) +{ + ssize_t rv; + size_t i; + QCryptoBlockLUKS *luks = block->opaque; + + /* + * Read the entire LUKS header, minus the key material from + * the underlying device + */ + rv = readfunc(block, 0, + (uint8_t *)&luks->header, + sizeof(luks->header), + opaque, + errp); + if (rv < 0) { + return rv; + } + + /* + * The header is always stored in big-endian format, so + * convert everything to native + */ + be16_to_cpus(&luks->header.version); + be32_to_cpus(&luks->header.payload_offset_sector); + be32_to_cpus(&luks->header.master_key_len); + be32_to_cpus(&luks->header.master_key_iterations); + + for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { + be32_to_cpus(&luks->header.key_slots[i].active); + be32_to_cpus(&luks->header.key_slots[i].iterations); + be32_to_cpus(&luks->header.key_slots[i].key_offset_sector); + be32_to_cpus(&luks->header.key_slots[i].stripes); + } + + return 0; +} + /* * Given a key slot, and user password, this will attempt to unlock * the master encryption key from the key slot. @@ -623,8 +714,6 @@ qcrypto_block_luks_open(QCryptoBlock *block, QCryptoBlockLUKS *luks = NULL; Error *local_err = NULL; int ret = 0; - size_t i; - ssize_t rv; g_autofree uint8_t *masterkey = NULL; char *ivgen_name, *ivhash_name; g_autofree char *password = NULL; @@ -646,31 +735,11 @@ qcrypto_block_luks_open(QCryptoBlock *block, luks = g_new0(QCryptoBlockLUKS, 1); block->opaque = luks; - /* Read the entire LUKS header, minus the key material from - * the underlying device */ - rv = readfunc(block, 0, - (uint8_t *)&luks->header, - sizeof(luks->header), - opaque, - errp); - if (rv < 0) { - ret = rv; + ret = qcrypto_block_luks_load_header(block, readfunc, opaque, errp); + if (ret < 0) { goto fail; } - /* The header is always stored in big-endian format, so - * convert everything to native */ - be16_to_cpus(&luks->header.version); - be32_to_cpus(&luks->header.payload_offset_sector); - be32_to_cpus(&luks->header.master_key_len); - be32_to_cpus(&luks->header.master_key_iterations); - - for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { - be32_to_cpus(&luks->header.key_slots[i].active); - be32_to_cpus(&luks->header.key_slots[i].iterations); - be32_to_cpus(&luks->header.key_slots[i].key_offset_sector); - be32_to_cpus(&luks->header.key_slots[i].stripes); - } if (memcmp(luks->header.magic, qcrypto_block_luks_magic, QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) { @@ -1235,46 +1304,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, goto error; } - /* Everything on disk uses Big Endian, so flip header fields - * before writing them */ - cpu_to_be16s(&luks->header.version); - cpu_to_be32s(&luks->header.payload_offset_sector); - cpu_to_be32s(&luks->header.master_key_len); - cpu_to_be32s(&luks->header.master_key_iterations); - - for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { - cpu_to_be32s(&luks->header.key_slots[i].active); - cpu_to_be32s(&luks->header.key_slots[i].iterations); - cpu_to_be32s(&luks->header.key_slots[i].key_offset_sector); - cpu_to_be32s(&luks->header.key_slots[i].stripes); - } - - - /* Write out the partition header and key slot headers */ - writefunc(block, 0, - (const uint8_t *)&luks->header, - sizeof(luks->header), - opaque, - &local_err); - - /* Delay checking local_err until we've byte-swapped */ - - /* Byte swap the header back to native, in case we need - * to read it again later */ - be16_to_cpus(&luks->header.version); - be32_to_cpus(&luks->header.payload_offset_sector); - be32_to_cpus(&luks->header.master_key_len); - be32_to_cpus(&luks->header.master_key_iterations); - - for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { - be32_to_cpus(&luks->header.key_slots[i].active); - be32_to_cpus(&luks->header.key_slots[i].iterations); - be32_to_cpus(&luks->header.key_slots[i].key_offset_sector); - be32_to_cpus(&luks->header.key_slots[i].stripes); - } - - if (local_err) { - error_propagate(errp, local_err); + if (qcrypto_block_luks_store_header(block, writefunc, opaque, errp) < 0) { goto error; } From patchwork Thu Sep 12 09:17:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142643 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 018CE924 for ; Thu, 12 Sep 2019 09:26:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D65D32084F for ; Thu, 12 Sep 2019 09:26:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D65D32084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59740 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LN8-00035F-Na for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:26:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42583) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEd-00029f-S6 for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEc-0005w3-As for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:51 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40318) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEY-0005tn-RC; Thu, 12 Sep 2019 05:17:47 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2ADA14628B; Thu, 12 Sep 2019 09:17:46 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id EAB7A194B9; Thu, 12 Sep 2019 09:17:43 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:07 +0300 Message-Id: <20190912091710.21449-10-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Thu, 12 Sep 2019 09:17:46 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 09/12] qcrypto-luks: extract check and parse header X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This is just to make qcrypto_block_luks_open more reasonable in size. Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 235 ++++++++++++++++++++++++-------------------- 1 file changed, 127 insertions(+), 108 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index c3f3488222..24c1da3739 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -500,6 +500,129 @@ qcrypto_block_luks_load_header(QCryptoBlock *block, return 0; } +/* + * Does basic sanity checks on the LUKS header + */ +static int +qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp) +{ + if (memcmp(luks->header.magic, qcrypto_block_luks_magic, + QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) { + error_setg(errp, "Volume is not in LUKS format"); + return -1; + } + + if (luks->header.version != QCRYPTO_BLOCK_LUKS_VERSION) { + error_setg(errp, "LUKS version %" PRIu32 " is not supported", + luks->header.version); + return -1; + } + return 0; +} + +/* + * Parses the crypto parameters that are stored in the LUKS header + */ + +static int +qcrypto_block_luks_parse_header(QCryptoBlockLUKS *luks, Error **errp) +{ + g_autofree char *cipher_mode = g_strdup(luks->header.cipher_mode); + char *ivgen_name, *ivhash_name; + Error *local_err = NULL; + + /* + * The cipher_mode header contains a string that we have + * to further parse, of the format + * + * -[:] + * + * eg cbc-essiv:sha256, cbc-plain64 + */ + ivgen_name = strchr(cipher_mode, '-'); + if (!ivgen_name) { + error_setg(errp, "Unexpected cipher mode string format %s", + luks->header.cipher_mode); + return -1; + } + *ivgen_name = '\0'; + ivgen_name++; + + ivhash_name = strchr(ivgen_name, ':'); + if (!ivhash_name) { + luks->ivgen_hash_alg = 0; + } else { + *ivhash_name = '\0'; + ivhash_name++; + + luks->ivgen_hash_alg = qcrypto_block_luks_hash_name_lookup(ivhash_name, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + } + + luks->cipher_mode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + + luks->cipher_alg = + qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name, + luks->cipher_mode, + luks->header.master_key_len, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + + luks->hash_alg = + qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + + luks->ivgen_alg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + + if (luks->ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { + if (!ivhash_name) { + error_setg(errp, "Missing IV generator hash specification"); + return -1; + } + luks->ivgen_cipher_alg = + qcrypto_block_luks_essiv_cipher(luks->cipher_alg, + luks->ivgen_hash_alg, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return -1; + } + } else { + + /* + * Note we parsed the ivhash_name earlier in the cipher_mode + * spec string even with plain/plain64 ivgens, but we + * will ignore it, since it is irrelevant for these ivgens. + * This is for compat with dm-crypt which will silently + * ignore hash names with these ivgens rather than report + * an error about the invalid usage + */ + luks->ivgen_cipher_alg = luks->cipher_alg; + } + return 0; +} + /* * Given a key slot, and user password, this will attempt to unlock * the master encryption key from the key slot. @@ -712,12 +835,9 @@ qcrypto_block_luks_open(QCryptoBlock *block, Error **errp) { QCryptoBlockLUKS *luks = NULL; - Error *local_err = NULL; int ret = 0; g_autofree uint8_t *masterkey = NULL; - char *ivgen_name, *ivhash_name; g_autofree char *password = NULL; - g_autofree char *cipher_mode = NULL; if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) { if (!options->u.luks.key_secret) { @@ -741,117 +861,16 @@ qcrypto_block_luks_open(QCryptoBlock *block, } - if (memcmp(luks->header.magic, qcrypto_block_luks_magic, - QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) { - error_setg(errp, "Volume is not in LUKS format"); - ret = -1; - goto fail; - } - if (luks->header.version != QCRYPTO_BLOCK_LUKS_VERSION) { - error_setg(errp, "LUKS version %" PRIu32 " is not supported", - luks->header.version); - ret = -1; - goto fail; - } - - cipher_mode = g_strdup(luks->header.cipher_mode); - - /* - * The cipher_mode header contains a string that we have - * to further parse, of the format - * - * -[:] - * - * eg cbc-essiv:sha256, cbc-plain64 - */ - ivgen_name = strchr(cipher_mode, '-'); - if (!ivgen_name) { - ret = -1; - error_setg(errp, "Unexpected cipher mode string format %s", - cipher_mode); - goto fail; - } - *ivgen_name = '\0'; - ivgen_name++; - - ivhash_name = strchr(ivgen_name, ':'); - if (!ivhash_name) { - luks->ivgen_hash_alg = 0; - } else { - *ivhash_name = '\0'; - ivhash_name++; - - luks->ivgen_hash_alg = qcrypto_block_luks_hash_name_lookup(ivhash_name, - &local_err); - if (local_err) { - ret = -1; - error_propagate(errp, local_err); - goto fail; - } - } - - luks->cipher_mode = qcrypto_block_luks_cipher_mode_lookup(cipher_mode, - &local_err); - if (local_err) { - ret = -1; - error_propagate(errp, local_err); - goto fail; - } - - luks->cipher_alg = - qcrypto_block_luks_cipher_name_lookup(luks->header.cipher_name, - luks->cipher_mode, - luks->header.master_key_len, - &local_err); - if (local_err) { - ret = -1; - error_propagate(errp, local_err); - goto fail; - } - - luks->hash_alg = - qcrypto_block_luks_hash_name_lookup(luks->header.hash_spec, - &local_err); - if (local_err) { - ret = -1; - error_propagate(errp, local_err); + ret = qcrypto_block_luks_check_header(luks, errp); + if (ret < 0) { goto fail; } - luks->ivgen_alg = qcrypto_block_luks_ivgen_name_lookup(ivgen_name, - &local_err); - if (local_err) { - ret = -1; - error_propagate(errp, local_err); + ret = qcrypto_block_luks_parse_header(luks, errp); + if (ret < 0) { goto fail; } - if (luks->ivgen_alg == QCRYPTO_IVGEN_ALG_ESSIV) { - if (!ivhash_name) { - ret = -1; - error_setg(errp, "Missing IV generator hash specification"); - goto fail; - } - luks->ivgen_cipher_alg = - qcrypto_block_luks_essiv_cipher(luks->cipher_alg, - luks->ivgen_hash_alg, - &local_err); - if (local_err) { - ret = -1; - error_propagate(errp, local_err); - goto fail; - } - } else { - /* Note we parsed the ivhash_name earlier in the cipher_mode - * spec string even with plain/plain64 ivgens, but we - * will ignore it, since it is irrelevant for these ivgens. - * This is for compat with dm-crypt which will silently - * ignore hash names with these ivgens rather than report - * an error about the invalid usage - */ - luks->ivgen_cipher_alg = luks->cipher_alg; - } - if (!(flags & QCRYPTO_BLOCK_OPEN_NO_IO)) { /* Try to find which key slot our password is valid for * and unlock the master key from that slot. From patchwork Thu Sep 12 09:17:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142645 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1DFC916C1 for ; Thu, 12 Sep 2019 09:26:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E346D208E4 for ; Thu, 12 Sep 2019 09:26:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E346D208E4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59742 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LN8-00035g-OW for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:26:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42627) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEi-0002Ef-AA for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEg-0005zB-Ea for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:17:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36890) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEc-0005vQ-OF; Thu, 12 Sep 2019 05:17:50 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BAEF3A37182; Thu, 12 Sep 2019 09:17:48 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 84C07194B9; Thu, 12 Sep 2019 09:17:46 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:08 +0300 Message-Id: <20190912091710.21449-11-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.68]); Thu, 12 Sep 2019 09:17:48 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 10/12] qcrypto-luks: extract store key function X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This function will be used later to store new keys to the luks metadata Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 304 ++++++++++++++++++++++++++------------------ 1 file changed, 181 insertions(+), 123 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index 24c1da3739..c6045da33e 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -623,6 +623,176 @@ qcrypto_block_luks_parse_header(QCryptoBlockLUKS *luks, Error **errp) return 0; } +/* + * Given a key slot, user password, and the master key, + * will store the encrypted master key there, and update the + * in-memory header. User must then write the in-memory header + * + * Returns: + * 0 if the keyslot was written successfully + * with the provided password + * -1 if a fatal error occurred while storing the key + */ +static int +qcrypto_block_luks_store_key(QCryptoBlock *block, + unsigned int slot_idx, + const char *password, + uint8_t *masterkey, + uint64_t iter_time, + QCryptoBlockWriteFunc writefunc, + void *opaque, + Error **errp) +{ + QCryptoBlockLUKS *luks = block->opaque; + QCryptoBlockLUKSKeySlot *slot = &luks->header.key_slots[slot_idx]; + g_autofree uint8_t *splitkey = NULL; + size_t splitkeylen; + g_autofree uint8_t *slotkey = NULL; + g_autoptr(QCryptoCipher) cipher = NULL; + g_autoptr(QCryptoIVGen) ivgen = NULL; + Error *local_err = NULL; + uint64_t iters; + int ret = -1; + + if (qcrypto_random_bytes(slot->salt, + QCRYPTO_BLOCK_LUKS_SALT_LEN, + errp) < 0) { + goto cleanup; + } + + splitkeylen = luks->header.master_key_len * slot->stripes; + + /* + * Determine how many iterations are required to + * hash the user password while consuming 1 second of compute + * time + */ + iters = qcrypto_pbkdf2_count_iters(luks->hash_alg, + (uint8_t *)password, strlen(password), + slot->salt, + QCRYPTO_BLOCK_LUKS_SALT_LEN, + luks->header.master_key_len, + &local_err); + if (local_err) { + error_propagate(errp, local_err); + goto cleanup; + } + + if (iters > (ULLONG_MAX / iter_time)) { + error_setg_errno(errp, ERANGE, + "PBKDF iterations %llu too large to scale", + (unsigned long long)iters); + goto cleanup; + } + + /* iter_time was in millis, but count_iters reported for secs */ + iters = iters * iter_time / 1000; + + if (iters > UINT32_MAX) { + error_setg_errno(errp, ERANGE, + "PBKDF iterations %llu larger than %u", + (unsigned long long)iters, UINT32_MAX); + goto cleanup; + } + + slot->iterations = + MAX(iters, QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS); + + + /* + * Generate a key that we'll use to encrypt the master + * key, from the user's password + */ + slotkey = g_new0(uint8_t, luks->header.master_key_len); + if (qcrypto_pbkdf2(luks->hash_alg, + (uint8_t *)password, strlen(password), + slot->salt, + QCRYPTO_BLOCK_LUKS_SALT_LEN, + slot->iterations, + slotkey, luks->header.master_key_len, + errp) < 0) { + goto cleanup; + } + + + /* + * Setup the encryption objects needed to encrypt the + * master key material + */ + cipher = qcrypto_cipher_new(luks->cipher_alg, + luks->cipher_mode, + slotkey, luks->header.master_key_len, + errp); + if (!cipher) { + goto cleanup; + } + + ivgen = qcrypto_ivgen_new(luks->ivgen_alg, + luks->ivgen_cipher_alg, + luks->ivgen_hash_alg, + slotkey, luks->header.master_key_len, + errp); + if (!ivgen) { + goto cleanup; + } + + /* + * Before storing the master key, we need to vastly + * increase its size, as protection against forensic + * disk data recovery + */ + splitkey = g_new0(uint8_t, splitkeylen); + + if (qcrypto_afsplit_encode(luks->hash_alg, + luks->header.master_key_len, + slot->stripes, + masterkey, + splitkey, + errp) < 0) { + goto cleanup; + } + + /* + * Now we encrypt the split master key with the key generated + * from the user's password, before storing it + */ + if (qcrypto_block_cipher_encrypt_helper(cipher, block->niv, ivgen, + QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, + 0, + splitkey, + splitkeylen, + errp) < 0) { + goto cleanup; + } + + /* Write out the slot's master key material. */ + if (writefunc(block, + slot->key_offset_sector * + QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, + splitkey, splitkeylen, + opaque, + errp) != splitkeylen) { + goto cleanup; + } + + slot->active = QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED; + + if (qcrypto_block_luks_store_header(block, writefunc, opaque, errp) < 0) { + goto cleanup; + } + + ret = 0; + +cleanup: + if (slotkey) { + memset(slotkey, 0, luks->header.master_key_len); + } + if (splitkey) { + memset(splitkey, 0, splitkeylen); + } + return ret; +} + /* * Given a key slot, and user password, this will attempt to unlock * the master encryption key from the key slot. @@ -954,12 +1124,8 @@ qcrypto_block_luks_create(QCryptoBlock *block, QCryptoBlockCreateOptionsLUKS luks_opts; Error *local_err = NULL; g_autofree uint8_t *masterkey = NULL; - g_autofree uint8_t *slotkey = NULL; - g_autofree uint8_t *splitkey = NULL; size_t splitkeylen = 0; size_t i; - g_autoptr(QCryptoCipher) cipher = NULL; - g_autoptr(QCryptoIVGen) ivgen = NULL; g_autofree char *password = NULL; const char *cipher_alg; const char *cipher_mode; @@ -1182,9 +1348,7 @@ qcrypto_block_luks_create(QCryptoBlock *block, * to use the first key slot */ splitkeylen = luks->header.master_key_len * QCRYPTO_BLOCK_LUKS_STRIPES; for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { - luks->header.key_slots[i].active = i == 0 ? - QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED : - QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED; + luks->header.key_slots[i].active = QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED; luks->header.key_slots[i].stripes = QCRYPTO_BLOCK_LUKS_STRIPES; /* This calculation doesn't match that shown in the spec, @@ -1198,107 +1362,6 @@ qcrypto_block_luks_create(QCryptoBlock *block, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) * i); } - if (qcrypto_random_bytes(luks->header.key_slots[0].salt, - QCRYPTO_BLOCK_LUKS_SALT_LEN, - errp) < 0) { - goto error; - } - - /* Again we determine how many iterations are required to - * hash the user password while consuming 1 second of compute - * time */ - iters = qcrypto_pbkdf2_count_iters(luks_opts.hash_alg, - (uint8_t *)password, strlen(password), - luks->header.key_slots[0].salt, - QCRYPTO_BLOCK_LUKS_SALT_LEN, - luks->header.master_key_len, - &local_err); - if (local_err) { - error_propagate(errp, local_err); - goto error; - } - - if (iters > (ULLONG_MAX / luks_opts.iter_time)) { - error_setg_errno(errp, ERANGE, - "PBKDF iterations %llu too large to scale", - (unsigned long long)iters); - goto error; - } - - /* iter_time was in millis, but count_iters reported for secs */ - iters = iters * luks_opts.iter_time / 1000; - - if (iters > UINT32_MAX) { - error_setg_errno(errp, ERANGE, - "PBKDF iterations %llu larger than %u", - (unsigned long long)iters, UINT32_MAX); - goto error; - } - - luks->header.key_slots[0].iterations = - MAX(iters, QCRYPTO_BLOCK_LUKS_MIN_SLOT_KEY_ITERS); - - - /* Generate a key that we'll use to encrypt the master - * key, from the user's password - */ - slotkey = g_new0(uint8_t, luks->header.master_key_len); - if (qcrypto_pbkdf2(luks_opts.hash_alg, - (uint8_t *)password, strlen(password), - luks->header.key_slots[0].salt, - QCRYPTO_BLOCK_LUKS_SALT_LEN, - luks->header.key_slots[0].iterations, - slotkey, luks->header.master_key_len, - errp) < 0) { - goto error; - } - - - /* Setup the encryption objects needed to encrypt the - * master key material - */ - cipher = qcrypto_cipher_new(luks_opts.cipher_alg, - luks_opts.cipher_mode, - slotkey, luks->header.master_key_len, - errp); - if (!cipher) { - goto error; - } - - ivgen = qcrypto_ivgen_new(luks_opts.ivgen_alg, - luks->ivgen_cipher_alg, - luks_opts.ivgen_hash_alg, - slotkey, luks->header.master_key_len, - errp); - if (!ivgen) { - goto error; - } - - /* Before storing the master key, we need to vastly - * increase its size, as protection against forensic - * disk data recovery */ - splitkey = g_new0(uint8_t, splitkeylen); - - if (qcrypto_afsplit_encode(luks_opts.hash_alg, - luks->header.master_key_len, - luks->header.key_slots[0].stripes, - masterkey, - splitkey, - errp) < 0) { - goto error; - } - - /* Now we encrypt the split master key with the key generated - * from the user's password, before storing it */ - if (qcrypto_block_cipher_encrypt_helper(cipher, block->niv, ivgen, - QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, - 0, - splitkey, - splitkeylen, - errp) < 0) { - goto error; - } - /* The total size of the LUKS headers is the partition header + key * slot headers, rounded up to the nearest sector, combined with @@ -1323,23 +1386,21 @@ qcrypto_block_luks_create(QCryptoBlock *block, goto error; } - if (qcrypto_block_luks_store_header(block, writefunc, opaque, errp) < 0) { - goto error; - } - /* Write out the master key material, starting at the - * sector immediately following the partition header. */ - if (writefunc(block, - luks->header.key_slots[0].key_offset_sector * - QCRYPTO_BLOCK_LUKS_SECTOR_SIZE, - splitkey, splitkeylen, - opaque, - errp) != splitkeylen) { + /* populate the slot 0 with the password encrypted master key*/ + /* This will also store the header */ + if (qcrypto_block_luks_store_key(block, + 0, + password, + masterkey, + luks_opts.iter_time, + writefunc, + opaque, + errp) < 0) { goto error; } memset(masterkey, 0, luks->header.master_key_len); - memset(slotkey, 0, luks->header.master_key_len); return 0; @@ -1347,9 +1408,6 @@ qcrypto_block_luks_create(QCryptoBlock *block, if (masterkey) { memset(masterkey, 0, luks->header.master_key_len); } - if (slotkey) { - memset(slotkey, 0, luks->header.master_key_len); - } qcrypto_block_free_cipher(block); qcrypto_ivgen_free(block->ivgen); From patchwork Thu Sep 12 09:17:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142649 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7A6231599 for ; Thu, 12 Sep 2019 09:29:16 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5A1452084F for ; Thu, 12 Sep 2019 09:29:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5A1452084F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59772 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LPf-0006ON-CC for patchwork-qemu-devel@patchwork.kernel.org; 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Thu, 12 Sep 2019 09:17:48 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:09 +0300 Message-Id: <20190912091710.21449-12-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.69]); Thu, 12 Sep 2019 09:17:53 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 11/12] qcrypto-luks: simplify the math used for keyslot locations X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 63 ++++++++++++++++++++++++++++----------------- 1 file changed, 40 insertions(+), 23 deletions(-) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index c6045da33e..0d155c6614 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -409,6 +409,30 @@ qcrypto_block_luks_essiv_cipher(QCryptoCipherAlgorithm cipher, } } +/* + * Returns number of sectors needed to store the key material + * given number of anti forensic stripes + */ +static int +qcrypto_block_luks_splitkeylen_sectors(const QCryptoBlockLUKS *luks, + unsigned int header_sectors, + unsigned int stripes) +{ + /* + * This calculation doesn't match that shown in the spec, + * but instead follows the cryptsetup implementation. + */ + + size_t splitkeylen = luks->header.master_key_len * stripes; + + /* First align the key material size to block size*/ + size_t splitkeylen_sectors = + DIV_ROUND_UP(splitkeylen, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE); + + /* Then also align the key material size to the size of the header */ + return ROUND_UP(splitkeylen_sectors, header_sectors); +} + /* * Stores the main LUKS header, taking care of endianess */ @@ -1124,7 +1148,8 @@ qcrypto_block_luks_create(QCryptoBlock *block, QCryptoBlockCreateOptionsLUKS luks_opts; Error *local_err = NULL; g_autofree uint8_t *masterkey = NULL; - size_t splitkeylen = 0; + size_t header_sectors; + size_t split_key_sectors; size_t i; g_autofree char *password = NULL; const char *cipher_alg; @@ -1343,37 +1368,29 @@ qcrypto_block_luks_create(QCryptoBlock *block, goto error; } + /* start with the sector that follows the header*/ + header_sectors = QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / + QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; + + split_key_sectors = + qcrypto_block_luks_splitkeylen_sectors(luks, + header_sectors, + QCRYPTO_BLOCK_LUKS_STRIPES); - /* Although LUKS has multiple key slots, we're just going - * to use the first key slot */ - splitkeylen = luks->header.master_key_len * QCRYPTO_BLOCK_LUKS_STRIPES; for (i = 0; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS; i++) { - luks->header.key_slots[i].active = QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED; - luks->header.key_slots[i].stripes = QCRYPTO_BLOCK_LUKS_STRIPES; + QCryptoBlockLUKSKeySlot *slot = &luks->header.key_slots[i]; + slot->active = QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED; - /* This calculation doesn't match that shown in the spec, - * but instead follows the cryptsetup implementation. - */ - luks->header.key_slots[i].key_offset_sector = - (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / - QCRYPTO_BLOCK_LUKS_SECTOR_SIZE) + - (ROUND_UP(DIV_ROUND_UP(splitkeylen, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE), - (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / - QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) * i); + slot->key_offset_sector = header_sectors + i * split_key_sectors; + slot->stripes = QCRYPTO_BLOCK_LUKS_STRIPES; } - /* The total size of the LUKS headers is the partition header + key * slot headers, rounded up to the nearest sector, combined with * the size of each master key material region, also rounded up * to the nearest sector */ - luks->header.payload_offset_sector = - (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / - QCRYPTO_BLOCK_LUKS_SECTOR_SIZE) + - (ROUND_UP(DIV_ROUND_UP(splitkeylen, QCRYPTO_BLOCK_LUKS_SECTOR_SIZE), - (QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / - QCRYPTO_BLOCK_LUKS_SECTOR_SIZE)) * - QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS); + luks->header.payload_offset_sector = header_sectors + + QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS * split_key_sectors; block->sector_size = QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; block->payload_offset = luks->header.payload_offset_sector * From patchwork Thu Sep 12 09:17:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 11142657 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9133C912 for ; Thu, 12 Sep 2019 09:37:19 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7188C20856 for ; Thu, 12 Sep 2019 09:37:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7188C20856 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:59846 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LXR-0005q8-Hd for patchwork-qemu-devel@patchwork.kernel.org; Thu, 12 Sep 2019 05:37:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42678) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i8LEm-0002J3-Kk for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:18:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i8LEl-00062Q-6Y for qemu-devel@nongnu.org; Thu, 12 Sep 2019 05:18:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41492) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i8LEi-00060S-U2; Thu, 12 Sep 2019 05:17:57 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4AF163003AFE; Thu, 12 Sep 2019 09:17:56 +0000 (UTC) Received: from maximlenovopc.usersys.redhat.com (unknown [10.35.206.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 14E1E166A2; Thu, 12 Sep 2019 09:17:53 +0000 (UTC) From: Maxim Levitsky To: qemu-devel@nongnu.org Date: Thu, 12 Sep 2019 12:17:10 +0300 Message-Id: <20190912091710.21449-13-mlevitsk@redhat.com> In-Reply-To: <20190912091710.21449-1-mlevitsk@redhat.com> References: <20190912091710.21449-1-mlevitsk@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Thu, 12 Sep 2019 09:17:56 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH 12/12] qcrypto-luks: more rigorous header checking X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , qemu-block@nongnu.org, John Snow , Markus Armbruster , Max Reitz , Maxim Levitsky Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Check that keyslots don't overlap with the data, and check that keyslots don't overlap with each other. (this is done using naive O(n^2) nested loops, but since there are just 8 keyslots, this doesn't really matter. Signed-off-by: Maxim Levitsky Reviewed-by: Daniel P. Berrangé --- crypto/block-luks.c | 52 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/crypto/block-luks.c b/crypto/block-luks.c index 0d155c6614..6c53bdc428 100644 --- a/crypto/block-luks.c +++ b/crypto/block-luks.c @@ -530,6 +530,11 @@ qcrypto_block_luks_load_header(QCryptoBlock *block, static int qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp) { + size_t i, j; + + unsigned int header_sectors = QCRYPTO_BLOCK_LUKS_KEY_SLOT_OFFSET / + QCRYPTO_BLOCK_LUKS_SECTOR_SIZE; + if (memcmp(luks->header.magic, qcrypto_block_luks_magic, QCRYPTO_BLOCK_LUKS_MAGIC_LEN) != 0) { error_setg(errp, "Volume is not in LUKS format"); @@ -541,6 +546,53 @@ qcrypto_block_luks_check_header(const QCryptoBlockLUKS *luks, Error **errp) luks->header.version); return -1; } + + /* Check all keyslots for corruption */ + for (i = 0 ; i < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS ; i++) { + + const QCryptoBlockLUKSKeySlot *slot1 = &luks->header.key_slots[i]; + unsigned int start1 = slot1->key_offset_sector; + unsigned int len1 = + qcrypto_block_luks_splitkeylen_sectors(luks, + header_sectors, + slot1->stripes); + + if (slot1->stripes == 0) { + error_setg(errp, "Keyslot %zu is corrupted (stripes == 0)", i); + return -1; + } + + if (slot1->active != QCRYPTO_BLOCK_LUKS_KEY_SLOT_DISABLED && + slot1->active != QCRYPTO_BLOCK_LUKS_KEY_SLOT_ENABLED) { + error_setg(errp, + "Keyslot %zu state (active/disable) is corrupted", i); + return -1; + } + + if (start1 + len1 > luks->header.payload_offset_sector) { + error_setg(errp, + "Keyslot %zu is overlapping with the encrypted payload", + i); + return -1; + } + + for (j = i + 1 ; j < QCRYPTO_BLOCK_LUKS_NUM_KEY_SLOTS ; j++) { + const QCryptoBlockLUKSKeySlot *slot2 = &luks->header.key_slots[j]; + unsigned int start2 = slot2->key_offset_sector; + unsigned int len2 = + qcrypto_block_luks_splitkeylen_sectors(luks, + header_sectors, + slot2->stripes); + + if (start1 + len1 > start2 && start2 + len2 > start1) { + error_setg(errp, + "Keyslots %zu and %zu are overlapping in the header", + i, j); + return -1; + } + } + + } return 0; }