From patchwork Sun Aug 18 16:57:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 13767478 Received: from frasgout12.his.huawei.com (frasgout12.his.huawei.com [14.137.139.154]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3AC1381AD2; Sun, 18 Aug 2024 16:59:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=14.137.139.154 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724000394; cv=none; b=fSZEKccjOedWCjF4xB11w3BRdLArVrjxn0uqMoAfIom96Uqt+uDSTttzRsWH/N5MeHUUO2DmjlRGCvSZm4x/zq6q3wOZ0vlL3wBWFF0bRMxYHk0+Pnl6dAbOSe/b/3UpHV+T9yPLxKXBBbHWAx+dwtIefttn9JY3OffLpEzsBAY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724000394; c=relaxed/simple; bh=cHL5GsLvcXJ/g143khkpa21JYhbmnZ62EP4VsbsjZTg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=N1jXqVA15l3dMYUeRtyxs3fmcZcGW4Kdwe6CusYLAS7FfL2F4Dng6QiU2MTtwIWckw29ei87Hk/MbZIrVVO0Y6D22OxcSnv1nSyYXuI3Aq7A9ch2Z49A+cq4E4SpH6LHM2zmtz0TDmynsTXgFDyxr833+2FKZn7hMOcZNskjpRI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=14.137.139.154 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.18.186.51]) by frasgout12.his.huawei.com (SkyGuard) with ESMTP id 4Wn1YL6Qz0z9v7JY; Mon, 19 Aug 2024 00:35:18 +0800 (CST) Received: from mail02.huawei.com (unknown [7.182.16.47]) by mail.maildlp.com (Postfix) with ESMTP id 3389114022E; Mon, 19 Aug 2024 00:59:45 +0800 (CST) Received: from huaweicloud.com (unknown [10.204.63.22]) by APP1 (Coremail) with SMTP id LxC2BwAXm4VpKMJm+zZxAQ--.21009S4; Sun, 18 Aug 2024 17:59:44 +0100 (CET) From: Roberto Sassu To: dhowells@redhat.com, dwmw2@infradead.org, herbert@gondor.apana.org.au, davem@davemloft.net Cc: linux-kernel@vger.kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, zohar@linux.ibm.com, linux-integrity@vger.kernel.org, Roberto Sassu Subject: [PATCH v2 02/14] rsa: add parser of raw format Date: Sun, 18 Aug 2024 18:57:44 +0200 Message-Id: <20240818165756.629203-3-roberto.sassu@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240818165756.629203-1-roberto.sassu@huaweicloud.com> References: <20240818165756.629203-1-roberto.sassu@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: LxC2BwAXm4VpKMJm+zZxAQ--.21009S4 X-Coremail-Antispam: 1UD129KBjvJXoWxtry8ZryUtw45try7XrWDJwb_yoW7GFy7pF 45G3yrKrWUJFyvyF4fuw1fJr13Jw1fuw4jqFZ3J3sYywsrWryUAw47CF4F9Fy5Gr9FyF12 yr4Yg3WY9rn8XFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPYb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUXw A2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVWUJVWUCwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4j6F4UM28EF7xvwVC2z280aVCY1x0267AKxVW8 JVW8Jr1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx 0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWU JVW8JwACjcxG0xvY0x0EwIxGrwACI402YVCY1x02628vn2kIc2xKxwCY1x0262kKe7AKxV WUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r 4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x07jerWrU UUUU= X-CM-SenderInfo: purev21wro2thvvxqx5xdzvxpfor3voofrz/1tbiAQATBGbBWHEB+gAAsj From: Roberto Sassu Parse the RSA key with RAW format if the ASN.1 parser returns an error. Signed-off-by: Roberto Sassu Signed-off-by: David Howells --- crypto/rsa.c | 14 +++++-- crypto/rsa_helper.c | 69 +++++++++++++++++++++++++++++++++++ include/crypto/internal/rsa.h | 6 +++ 3 files changed, 85 insertions(+), 4 deletions(-) diff --git a/crypto/rsa.c b/crypto/rsa.c index d9be9e86097e..66d42974d47d 100644 --- a/crypto/rsa.c +++ b/crypto/rsa.c @@ -272,8 +272,11 @@ static int rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key, rsa_free_mpi_key(mpi_key); ret = rsa_parse_pub_key(&raw_key, key, keylen); - if (ret) - return ret; + if (ret) { + ret = rsa_parse_pub_key_raw(&raw_key, key, keylen); + if (ret) + return ret; + } mpi_key->e = mpi_read_raw_data(raw_key.e, raw_key.e_sz); if (!mpi_key->e) @@ -311,8 +314,11 @@ static int rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key, rsa_free_mpi_key(mpi_key); ret = rsa_parse_priv_key(&raw_key, key, keylen); - if (ret) - return ret; + if (ret) { + ret = rsa_parse_priv_key_raw(&raw_key, key, keylen); + if (ret) + return ret; + } mpi_key->d = mpi_read_raw_data(raw_key.d, raw_key.d_sz); if (!mpi_key->d) diff --git a/crypto/rsa_helper.c b/crypto/rsa_helper.c index 94266f29049c..fb9443df8f0b 100644 --- a/crypto/rsa_helper.c +++ b/crypto/rsa_helper.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include "rsapubkey.asn1.h" #include "rsaprivkey.asn1.h" @@ -148,6 +149,32 @@ int rsa_get_qinv(void *context, size_t hdrlen, unsigned char tag, return 0; } +typedef int (*rsa_get_func)(void *, size_t, unsigned char, + const void *, size_t); + +static int rsa_parse_key_raw(struct rsa_key *rsa_key, + const void *key, unsigned int key_len, + rsa_get_func *func, int n_func) +{ + unsigned int nbytes, len = key_len; + const void *key_ptr = key; + int ret, i; + + for (i = 0; i < n_func; i++) { + ret = mpi_key_length(key_ptr, len, NULL, &nbytes); + if (ret < 0) + return ret; + + ret = func[i](rsa_key, 0, 0, key_ptr + 2, nbytes); + if (ret < 0) + return ret; + + key_ptr += nbytes + 2; + } + + return (key_ptr == key + key_len) ? 0 : -EINVAL; +} + /** * rsa_parse_pub_key() - decodes the BER encoded buffer and stores in the * provided struct rsa_key, pointers to the raw key as is, @@ -166,6 +193,27 @@ int rsa_parse_pub_key(struct rsa_key *rsa_key, const void *key, } EXPORT_SYMBOL_GPL(rsa_parse_pub_key); +/** + * rsa_parse_pub_key_raw() - parse the RAW key and store in the provided struct + * rsa_key, pointers to the raw key as is, so that + * the caller can copy it or MPI parse it, etc. + * + * @rsa_key: struct rsa_key key representation + * @key: key in RAW format + * @key_len: length of key + * + * Return: 0 on success or error code in case of error + */ +int rsa_parse_pub_key_raw(struct rsa_key *rsa_key, const void *key, + unsigned int key_len) +{ + rsa_get_func pub_func[] = {rsa_get_n, rsa_get_e}; + + return rsa_parse_key_raw(rsa_key, key, key_len, + pub_func, ARRAY_SIZE(pub_func)); +} +EXPORT_SYMBOL_GPL(rsa_parse_pub_key_raw); + /** * rsa_parse_priv_key() - decodes the BER encoded buffer and stores in the * provided struct rsa_key, pointers to the raw key @@ -184,3 +232,24 @@ int rsa_parse_priv_key(struct rsa_key *rsa_key, const void *key, return asn1_ber_decoder(&rsaprivkey_decoder, rsa_key, key, key_len); } EXPORT_SYMBOL_GPL(rsa_parse_priv_key); + +/** + * rsa_parse_priv_key_raw() - parse the RAW key and store in the provided struct + * rsa_key, pointers to the raw key as is, so that + * the caller can copy it or MPI parse it, etc. + * + * @rsa_key: struct rsa_key key representation + * @key: key in RAW format + * @key_len: length of key + * + * Return: 0 on success or error code in case of error + */ +int rsa_parse_priv_key_raw(struct rsa_key *rsa_key, const void *key, + unsigned int key_len) +{ + rsa_get_func priv_func[] = {rsa_get_n, rsa_get_e, rsa_get_d}; + + return rsa_parse_key_raw(rsa_key, key, key_len, + priv_func, ARRAY_SIZE(priv_func)); +} +EXPORT_SYMBOL_GPL(rsa_parse_priv_key_raw); diff --git a/include/crypto/internal/rsa.h b/include/crypto/internal/rsa.h index e870133f4b77..7141e806ceea 100644 --- a/include/crypto/internal/rsa.h +++ b/include/crypto/internal/rsa.h @@ -50,8 +50,14 @@ struct rsa_key { int rsa_parse_pub_key(struct rsa_key *rsa_key, const void *key, unsigned int key_len); +int rsa_parse_pub_key_raw(struct rsa_key *rsa_key, const void *key, + unsigned int key_len); + int rsa_parse_priv_key(struct rsa_key *rsa_key, const void *key, unsigned int key_len); +int rsa_parse_priv_key_raw(struct rsa_key *rsa_key, const void *key, + unsigned int key_len); + extern struct crypto_template rsa_pkcs1pad_tmpl; #endif