From patchwork Mon Nov 5 23:25:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 10669387 X-Patchwork-Delegate: herbert@gondor.apana.org.au Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 071D015E9 for ; Mon, 5 Nov 2018 23:28:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0BDC29FED for ; Mon, 5 Nov 2018 23:28:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E49C829FF2; Mon, 5 Nov 2018 23:28:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 07EE229FED for ; Mon, 5 Nov 2018 23:28:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728947AbeKFItN (ORCPT ); Tue, 6 Nov 2018 03:49:13 -0500 Received: from mail.kernel.org ([198.145.29.99]:54494 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725878AbeKFItN (ORCPT ); Tue, 6 Nov 2018 03:49:13 -0500 Received: from ebiggers-linuxstation.kir.corp.google.com (unknown [104.132.51.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9442820866; Mon, 5 Nov 2018 23:27:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541460422; bh=loyvozjPziq8VWzPSVomt1N0VqsdVbuns+k3NBV8Ek0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fMWul0XCCmLZ/qnWKL2joi/lrsEyx6R0/4pDauRNCBbC8H8tuGRxsBBtz+EqfbtSd ZN+8JrFufO+0r1z0sgptp6L6XfiCjTdt+eHgmcjoPtU6VC9wT1CkSOAAr1Z1dXngRf /wN43uIvHJGFwJ0YyDmCwJNL5pA5Xf/wPkFHDHNA= From: Eric Biggers To: linux-crypto@vger.kernel.org Cc: linux-fscrypt@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Herbert Xu , Paul Crowley , Greg Kaiser , "Jason A . Donenfeld" , Samuel Neves , Tomer Ashur Subject: [RFC PATCH v3 03/15] crypto: chacha20-generic - add XChaCha20 support Date: Mon, 5 Nov 2018 15:25:14 -0800 Message-Id: <20181105232526.173947-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.19.1.930.g4563a0d9d0-goog In-Reply-To: <20181105232526.173947-1-ebiggers@kernel.org> References: <20181105232526.173947-1-ebiggers@kernel.org> MIME-Version: 1.0 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Eric Biggers Add support for the XChaCha20 stream cipher. XChaCha20 is the application of the XSalsa20 construction (https://cr.yp.to/snuffle/xsalsa-20081128.pdf) to ChaCha20 rather than to Salsa20. XChaCha20 extends ChaCha20's nonce length from 64 bits (or 96 bits, depending on convention) to 192 bits, while provably retaining ChaCha20's security. XChaCha20 uses the ChaCha20 permutation to map the key and first 128 nonce bits to a 256-bit subkey. Then, it does the ChaCha20 stream cipher with the subkey and remaining 64 bits of nonce. We need XChaCha support in order to add support for the Adiantum encryption mode. Note that to meet our performance requirements, we actually plan to primarily use the variant XChaCha12. But we believe it's wise to first add XChaCha20 as a baseline with a higher security margin, in case there are any situations where it can be used. Supporting both variants is straightforward. Since XChaCha20's subkey differs for each request, XChaCha20 can't be a template that wraps ChaCha20; that would require re-keying the underlying ChaCha20 for every request, which wouldn't be thread-safe. Instead, we make XChaCha20 its own top-level algorithm which calls the ChaCha20 streaming implementation internally. Similar to the existing ChaCha20 implementation, we define the IV to be the nonce and stream position concatenated together. This allows users to seek to any position in the stream. I considered splitting the code into separate chacha20-common, chacha20, and xchacha20 modules, so that chacha20 and xchacha20 could be enabled/disabled independently. However, since nearly all the code is shared anyway, I ultimately decided there would have been little benefit to the added complexity of separate modules. Reviewed-by: Ard Biesheuvel Signed-off-by: Eric Biggers --- crypto/Kconfig | 14 +- crypto/chacha20_generic.c | 120 +++++--- crypto/testmgr.c | 6 + crypto/testmgr.h | 577 ++++++++++++++++++++++++++++++++++++++ include/crypto/chacha20.h | 14 +- 5 files changed, 689 insertions(+), 42 deletions(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index f7a235db56aa..d9acbce23d4d 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1387,18 +1387,22 @@ config CRYPTO_SALSA20 Bernstein . See config CRYPTO_CHACHA20 - tristate "ChaCha20 cipher algorithm" + tristate "ChaCha20 stream cipher algorithms" select CRYPTO_BLKCIPHER help - ChaCha20 cipher algorithm, RFC7539. + The ChaCha20 and XChaCha20 stream cipher algorithms. ChaCha20 is a 256-bit high-speed stream cipher designed by Daniel J. Bernstein and further specified in RFC7539 for use in IETF protocols. - This is the portable C implementation of ChaCha20. - - See also: + This is the portable C implementation of ChaCha20. See also: + XChaCha20 is the application of the XSalsa20 construction to ChaCha20 + rather than to Salsa20. XChaCha20 extends ChaCha20's nonce length + from 64 bits (or 96 bits using the RFC7539 convention) to 192 bits, + while provably retaining ChaCha20's security. See also: + + config CRYPTO_CHACHA20_X86_64 tristate "ChaCha20 cipher algorithm (x86_64/SSSE3/AVX2)" depends on X86 && 64BIT diff --git a/crypto/chacha20_generic.c b/crypto/chacha20_generic.c index 3529521d72a4..4305b1b62b16 100644 --- a/crypto/chacha20_generic.c +++ b/crypto/chacha20_generic.c @@ -1,7 +1,8 @@ /* - * ChaCha20 256-bit cipher algorithm, RFC7539 + * ChaCha20 (RFC7539) and XChaCha20 stream cipher algorithms * * Copyright (C) 2015 Martin Willi + * Copyright (C) 2018 Google LLC * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -36,6 +37,31 @@ static void chacha20_docrypt(u32 *state, u8 *dst, const u8 *src, } } +static int chacha20_stream_xor(struct skcipher_request *req, + struct chacha20_ctx *ctx, u8 *iv) +{ + struct skcipher_walk walk; + u32 state[16]; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + crypto_chacha20_init(state, ctx, iv); + + while (walk.nbytes > 0) { + unsigned int nbytes = walk.nbytes; + + if (nbytes < walk.total) + nbytes = round_down(nbytes, walk.stride); + + chacha20_docrypt(state, walk.dst.virt.addr, walk.src.virt.addr, + nbytes); + err = skcipher_walk_done(&walk, walk.nbytes - nbytes); + } + + return err; +} + void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv) { state[0] = 0x61707865; /* "expa" */ @@ -77,54 +103,74 @@ int crypto_chacha20_crypt(struct skcipher_request *req) { struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); struct chacha20_ctx *ctx = crypto_skcipher_ctx(tfm); - struct skcipher_walk walk; - u32 state[16]; - int err; - - err = skcipher_walk_virt(&walk, req, false); - crypto_chacha20_init(state, ctx, walk.iv); + return chacha20_stream_xor(req, ctx, req->iv); +} +EXPORT_SYMBOL_GPL(crypto_chacha20_crypt); - while (walk.nbytes > 0) { - unsigned int nbytes = walk.nbytes; +int crypto_xchacha20_crypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct chacha20_ctx *ctx = crypto_skcipher_ctx(tfm); + struct chacha20_ctx subctx; + u32 state[16]; + u8 real_iv[16]; - if (nbytes < walk.total) - nbytes = round_down(nbytes, walk.stride); + /* Compute the subkey given the original key and first 128 nonce bits */ + crypto_chacha20_init(state, ctx, req->iv); + hchacha20_block(state, subctx.key); - chacha20_docrypt(state, walk.dst.virt.addr, walk.src.virt.addr, - nbytes); - err = skcipher_walk_done(&walk, walk.nbytes - nbytes); - } + /* Build the real IV */ + memcpy(&real_iv[0], req->iv + 24, 8); /* stream position */ + memcpy(&real_iv[8], req->iv + 16, 8); /* remaining 64 nonce bits */ - return err; + /* Generate the stream and XOR it with the data */ + return chacha20_stream_xor(req, &subctx, real_iv); } -EXPORT_SYMBOL_GPL(crypto_chacha20_crypt); - -static struct skcipher_alg alg = { - .base.cra_name = "chacha20", - .base.cra_driver_name = "chacha20-generic", - .base.cra_priority = 100, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct chacha20_ctx), - .base.cra_module = THIS_MODULE, - - .min_keysize = CHACHA20_KEY_SIZE, - .max_keysize = CHACHA20_KEY_SIZE, - .ivsize = CHACHA20_IV_SIZE, - .chunksize = CHACHA20_BLOCK_SIZE, - .setkey = crypto_chacha20_setkey, - .encrypt = crypto_chacha20_crypt, - .decrypt = crypto_chacha20_crypt, +EXPORT_SYMBOL_GPL(crypto_xchacha20_crypt); + +static struct skcipher_alg algs[] = { + { + .base.cra_name = "chacha20", + .base.cra_driver_name = "chacha20-generic", + .base.cra_priority = 100, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct chacha20_ctx), + .base.cra_module = THIS_MODULE, + + .min_keysize = CHACHA20_KEY_SIZE, + .max_keysize = CHACHA20_KEY_SIZE, + .ivsize = CHACHA20_IV_SIZE, + .chunksize = CHACHA20_BLOCK_SIZE, + .setkey = crypto_chacha20_setkey, + .encrypt = crypto_chacha20_crypt, + .decrypt = crypto_chacha20_crypt, + }, { + .base.cra_name = "xchacha20", + .base.cra_driver_name = "xchacha20-generic", + .base.cra_priority = 100, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct chacha20_ctx), + .base.cra_module = THIS_MODULE, + + .min_keysize = CHACHA20_KEY_SIZE, + .max_keysize = CHACHA20_KEY_SIZE, + .ivsize = XCHACHA20_IV_SIZE, + .chunksize = CHACHA20_BLOCK_SIZE, + .setkey = crypto_chacha20_setkey, + .encrypt = crypto_xchacha20_crypt, + .decrypt = crypto_xchacha20_crypt, + } }; static int __init chacha20_generic_mod_init(void) { - return crypto_register_skcipher(&alg); + return crypto_register_skciphers(algs, ARRAY_SIZE(algs)); } static void __exit chacha20_generic_mod_fini(void) { - crypto_unregister_skcipher(&alg); + crypto_unregister_skciphers(algs, ARRAY_SIZE(algs)); } module_init(chacha20_generic_mod_init); @@ -132,6 +178,8 @@ module_exit(chacha20_generic_mod_fini); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Martin Willi "); -MODULE_DESCRIPTION("chacha20 cipher algorithm"); +MODULE_DESCRIPTION("ChaCha20 and XChaCha20 stream ciphers (generic)"); MODULE_ALIAS_CRYPTO("chacha20"); MODULE_ALIAS_CRYPTO("chacha20-generic"); +MODULE_ALIAS_CRYPTO("xchacha20"); +MODULE_ALIAS_CRYPTO("xchacha20-generic"); diff --git a/crypto/testmgr.c b/crypto/testmgr.c index b1f79c6bf409..a5512e69c8f3 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -3544,6 +3544,12 @@ static const struct alg_test_desc alg_test_descs[] = { .suite = { .hash = __VECS(aes_xcbc128_tv_template) } + }, { + .alg = "xchacha20", + .test = alg_test_skcipher, + .suite = { + .cipher = __VECS(xchacha20_tv_template) + }, }, { .alg = "xts(aes)", .test = alg_test_skcipher, diff --git a/crypto/testmgr.h b/crypto/testmgr.h index 1fe7b97ba03f..371641c73cf8 100644 --- a/crypto/testmgr.h +++ b/crypto/testmgr.h @@ -30802,6 +30802,583 @@ static const struct cipher_testvec chacha20_tv_template[] = { }, }; +static const struct cipher_testvec xchacha20_tv_template[] = { + { /* from libsodium test/default/xchacha20.c */ + .key = "\x79\xc9\x97\x98\xac\x67\x30\x0b" + "\xbb\x27\x04\xc9\x5c\x34\x1e\x32" + "\x45\xf3\xdc\xb2\x17\x61\xb9\x8e" + "\x52\xff\x45\xb2\x4f\x30\x4f\xc4", + .klen = 32, + .iv = "\xb3\x3f\xfd\x30\x96\x47\x9b\xcf" + "\xbc\x9a\xee\x49\x41\x76\x88\xa0" + "\xa2\x55\x4f\x8d\x95\x38\x94\x19" + "\x00\x00\x00\x00\x00\x00\x00\x00", + .ptext = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00", + .ctext = "\xc6\xe9\x75\x81\x60\x08\x3a\xc6" + "\x04\xef\x90\xe7\x12\xce\x6e\x75" + "\xd7\x79\x75\x90\x74\x4e\x0c\xf0" + "\x60\xf0\x13\x73\x9c", + .len = 29, + }, { /* from libsodium test/default/xchacha20.c */ + .key = "\x9d\x23\xbd\x41\x49\xcb\x97\x9c" + "\xcf\x3c\x5c\x94\xdd\x21\x7e\x98" + "\x08\xcb\x0e\x50\xcd\x0f\x67\x81" + "\x22\x35\xea\xaf\x60\x1d\x62\x32", + .klen = 32, + .iv = "\xc0\x47\x54\x82\x66\xb7\xc3\x70" + "\xd3\x35\x66\xa2\x42\x5c\xbf\x30" + "\xd8\x2d\x1e\xaf\x52\x94\x10\x9e" + "\x00\x00\x00\x00\x00\x00\x00\x00", + .ptext = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00", + .ctext = "\xa2\x12\x09\x09\x65\x94\xde\x8c" + "\x56\x67\xb1\xd1\x3a\xd9\x3f\x74" + "\x41\x06\xd0\x54\xdf\x21\x0e\x47" + "\x82\xcd\x39\x6f\xec\x69\x2d\x35" + "\x15\xa2\x0b\xf3\x51\xee\xc0\x11" + "\xa9\x2c\x36\x78\x88\xbc\x46\x4c" + "\x32\xf0\x80\x7a\xcd\x6c\x20\x3a" + "\x24\x7e\x0d\xb8\x54\x14\x84\x68" + "\xe9\xf9\x6b\xee\x4c\xf7\x18\xd6" + "\x8d\x5f\x63\x7c\xbd\x5a\x37\x64" + "\x57\x78\x8e\x6f\xae\x90\xfc\x31" + "\x09\x7c\xfc", + .len = 91, + }, { /* Taken from the ChaCha20 test vectors, appended 16 random bytes + to nonce, and recomputed the ciphertext with libsodium */ + .key = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00", + .klen = 32, + .iv = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x67\xc6\x69\x73" + "\x51\xff\x4a\xec\x29\xcd\xba\xab" + "\x00\x00\x00\x00\x00\x00\x00\x00", + .ptext = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00", + .ctext = "\x9c\x49\x2a\xe7\x8a\x2f\x93\xc7" + "\xb3\x33\x6f\x82\x17\xd8\xc4\x1e" + "\xad\x80\x11\x11\x1d\x4c\x16\x18" + "\x07\x73\x9b\x4f\xdb\x7c\xcb\x47" + "\xfd\xef\x59\x74\xfa\x3f\xe5\x4c" + "\x9b\xd0\xea\xbc\xba\x56\xad\x32" + "\x03\xdc\xf8\x2b\xc1\xe1\x75\x67" + "\x23\x7b\xe6\xfc\xd4\x03\x86\x54", + .len = 64, + }, { /* Taken from the ChaCha20 test vectors, appended 16 random bytes + to nonce, and recomputed the ciphertext with libsodium */ + .key = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x00\x00\x00\x00\x01", + .klen = 32, + .iv = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x02\xf2\xfb\xe3\x46" + "\x7c\xc2\x54\xf8\x1b\xe8\xe7\x8d" + "\x01\x00\x00\x00\x00\x00\x00\x00", + .ptext = "\x41\x6e\x79\x20\x73\x75\x62\x6d" + "\x69\x73\x73\x69\x6f\x6e\x20\x74" + "\x6f\x20\x74\x68\x65\x20\x49\x45" + "\x54\x46\x20\x69\x6e\x74\x65\x6e" + "\x64\x65\x64\x20\x62\x79\x20\x74" + "\x68\x65\x20\x43\x6f\x6e\x74\x72" + "\x69\x62\x75\x74\x6f\x72\x20\x66" + "\x6f\x72\x20\x70\x75\x62\x6c\x69" + "\x63\x61\x74\x69\x6f\x6e\x20\x61" + "\x73\x20\x61\x6c\x6c\x20\x6f\x72" + "\x20\x70\x61\x72\x74\x20\x6f\x66" + "\x20\x61\x6e\x20\x49\x45\x54\x46" + "\x20\x49\x6e\x74\x65\x72\x6e\x65" + "\x74\x2d\x44\x72\x61\x66\x74\x20" + "\x6f\x72\x20\x52\x46\x43\x20\x61" + "\x6e\x64\x20\x61\x6e\x79\x20\x73" + "\x74\x61\x74\x65\x6d\x65\x6e\x74" + "\x20\x6d\x61\x64\x65\x20\x77\x69" + "\x74\x68\x69\x6e\x20\x74\x68\x65" + "\x20\x63\x6f\x6e\x74\x65\x78\x74" + "\x20\x6f\x66\x20\x61\x6e\x20\x49" + "\x45\x54\x46\x20\x61\x63\x74\x69" + "\x76\x69\x74\x79\x20\x69\x73\x20" + "\x63\x6f\x6e\x73\x69\x64\x65\x72" + "\x65\x64\x20\x61\x6e\x20\x22\x49" + "\x45\x54\x46\x20\x43\x6f\x6e\x74" + "\x72\x69\x62\x75\x74\x69\x6f\x6e" + "\x22\x2e\x20\x53\x75\x63\x68\x20" + "\x73\x74\x61\x74\x65\x6d\x65\x6e" + "\x74\x73\x20\x69\x6e\x63\x6c\x75" + "\x64\x65\x20\x6f\x72\x61\x6c\x20" + "\x73\x74\x61\x74\x65\x6d\x65\x6e" + "\x74\x73\x20\x69\x6e\x20\x49\x45" + "\x54\x46\x20\x73\x65\x73\x73\x69" + "\x6f\x6e\x73\x2c\x20\x61\x73\x20" + "\x77\x65\x6c\x6c\x20\x61\x73\x20" + "\x77\x72\x69\x74\x74\x65\x6e\x20" + "\x61\x6e\x64\x20\x65\x6c\x65\x63" + "\x74\x72\x6f\x6e\x69\x63\x20\x63" + "\x6f\x6d\x6d\x75\x6e\x69\x63\x61" + "\x74\x69\x6f\x6e\x73\x20\x6d\x61" + "\x64\x65\x20\x61\x74\x20\x61\x6e" + "\x79\x20\x74\x69\x6d\x65\x20\x6f" + "\x72\x20\x70\x6c\x61\x63\x65\x2c" + "\x20\x77\x68\x69\x63\x68\x20\x61" + "\x72\x65\x20\x61\x64\x64\x72\x65" + "\x73\x73\x65\x64\x20\x74\x6f", + .ctext = "\xf9\xab\x7a\x4a\x60\xb8\x5f\xa0" + "\x50\xbb\x57\xce\xef\x8c\xc1\xd9" + "\x24\x15\xb3\x67\x5e\x7f\x01\xf6" + "\x1c\x22\xf6\xe5\x71\xb1\x43\x64" + "\x63\x05\xd5\xfc\x5c\x3d\xc0\x0e" + "\x23\xef\xd3\x3b\xd9\xdc\x7f\xa8" + "\x58\x26\xb3\xd0\xc2\xd5\x04\x3f" + "\x0a\x0e\x8f\x17\xe4\xcd\xf7\x2a" + "\xb4\x2c\x09\xe4\x47\xec\x8b\xfb" + "\x59\x37\x7a\xa1\xd0\x04\x7e\xaa" + "\xf1\x98\x5f\x24\x3d\x72\x9a\x43" + "\xa4\x36\x51\x92\x22\x87\xff\x26" + "\xce\x9d\xeb\x59\x78\x84\x5e\x74" + "\x97\x2e\x63\xc0\xef\x29\xf7\x8a" + "\xb9\xee\x35\x08\x77\x6a\x35\x9a" + "\x3e\xe6\x4f\x06\x03\x74\x1b\xc1" + "\x5b\xb3\x0b\x89\x11\x07\xd3\xb7" + "\x53\xd6\x25\x04\xd9\x35\xb4\x5d" + "\x4c\x33\x5a\xc2\x42\x4c\xe6\xa4" + "\x97\x6e\x0e\xd2\xb2\x8b\x2f\x7f" + "\x28\xe5\x9f\xac\x4b\x2e\x02\xab" + "\x85\xfa\xa9\x0d\x7c\x2d\x10\xe6" + "\x91\xab\x55\x63\xf0\xde\x3a\x94" + "\x25\x08\x10\x03\xc2\x68\xd1\xf4" + "\xaf\x7d\x9c\x99\xf7\x86\x96\x30" + "\x60\xfc\x0b\xe6\xa8\x80\x15\xb0" + "\x81\xb1\x0c\xbe\xb9\x12\x18\x25" + "\xe9\x0e\xb1\xe7\x23\xb2\xef\x4a" + "\x22\x8f\xc5\x61\x89\xd4\xe7\x0c" + "\x64\x36\x35\x61\xb6\x34\x60\xf7" + "\x7b\x61\x37\x37\x12\x10\xa2\xf6" + "\x7e\xdb\x7f\x39\x3f\xb6\x8e\x89" + "\x9e\xf3\xfe\x13\x98\xbb\x66\x5a" + "\xec\xea\xab\x3f\x9c\x87\xc4\x8c" + "\x8a\x04\x18\x49\xfc\x77\x11\x50" + "\x16\xe6\x71\x2b\xee\xc0\x9c\xb6" + "\x87\xfd\x80\xff\x0b\x1d\x73\x38" + "\xa4\x1d\x6f\xae\xe4\x12\xd7\x93" + "\x9d\xcd\x38\x26\x09\x40\x52\xcd" + "\x67\x01\x67\x26\xe0\x3e\x98\xa8" + "\xe8\x1a\x13\x41\xbb\x90\x4d\x87" + "\xbb\x42\x82\x39\xce\x3a\xd0\x18" + "\x6d\x7b\x71\x8f\xbb\x2c\x6a\xd1" + "\xbd\xf5\xc7\x8a\x7e\xe1\x1e\x0f" + "\x0d\x0d\x13\x7c\xd9\xd8\x3c\x91" + "\xab\xff\x1f\x12\xc3\xee\xe5\x65" + "\x12\x8d\x7b\x61\xe5\x1f\x98", + .len = 375, + .also_non_np = 1, + .np = 3, + .tap = { 375 - 20, 4, 16 }, + + }, { /* Taken from the ChaCha20 test vectors, appended 16 random bytes + to nonce, and recomputed the ciphertext with libsodium */ + .key = "\x1c\x92\x40\xa5\xeb\x55\xd3\x8a" + "\xf3\x33\x88\x86\x04\xf6\xb5\xf0" + "\x47\x39\x17\xc1\x40\x2b\x80\x09" + "\x9d\xca\x5c\xbc\x20\x70\x75\xc0", + .klen = 32, + .iv = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x02\x76\x5a\x2e\x63" + "\x33\x9f\xc9\x9a\x66\x32\x0d\xb7" + "\x2a\x00\x00\x00\x00\x00\x00\x00", + .ptext = "\x27\x54\x77\x61\x73\x20\x62\x72" + "\x69\x6c\x6c\x69\x67\x2c\x20\x61" + "\x6e\x64\x20\x74\x68\x65\x20\x73" + "\x6c\x69\x74\x68\x79\x20\x74\x6f" + "\x76\x65\x73\x0a\x44\x69\x64\x20" + "\x67\x79\x72\x65\x20\x61\x6e\x64" + "\x20\x67\x69\x6d\x62\x6c\x65\x20" + "\x69\x6e\x20\x74\x68\x65\x20\x77" + "\x61\x62\x65\x3a\x0a\x41\x6c\x6c" + "\x20\x6d\x69\x6d\x73\x79\x20\x77" + "\x65\x72\x65\x20\x74\x68\x65\x20" + "\x62\x6f\x72\x6f\x67\x6f\x76\x65" + "\x73\x2c\x0a\x41\x6e\x64\x20\x74" + "\x68\x65\x20\x6d\x6f\x6d\x65\x20" + "\x72\x61\x74\x68\x73\x20\x6f\x75" + "\x74\x67\x72\x61\x62\x65\x2e", + .ctext = "\x95\xb9\x51\xe7\x8f\xb4\xa4\x03" + "\xca\x37\xcc\xde\x60\x1d\x8c\xe2" + "\xf1\xbb\x8a\x13\x7f\x61\x85\xcc" + "\xad\xf4\xf0\xdc\x86\xa6\x1e\x10" + "\xbc\x8e\xcb\x38\x2b\xa5\xc8\x8f" + "\xaa\x03\x3d\x53\x4a\x42\xb1\x33" + "\xfc\xd3\xef\xf0\x8e\x7e\x10\x9c" + "\x6f\x12\x5e\xd4\x96\xfe\x5b\x08" + "\xb6\x48\xf0\x14\x74\x51\x18\x7c" + "\x07\x92\xfc\xac\x9d\xf1\x94\xc0" + "\xc1\x9d\xc5\x19\x43\x1f\x1d\xbb" + "\x07\xf0\x1b\x14\x25\x45\xbb\xcb" + "\x5c\xe2\x8b\x28\xf3\xcf\x47\x29" + "\x27\x79\x67\x24\xa6\x87\xc2\x11" + "\x65\x03\xfa\x45\xf7\x9e\x53\x7a" + "\x99\xf1\x82\x25\x4f\x8d\x07", + .len = 127, + }, { /* Taken from the ChaCha20 test vectors, appended 16 random bytes + to nonce, and recomputed the ciphertext with libsodium */ + .key = "\x1c\x92\x40\xa5\xeb\x55\xd3\x8a" + "\xf3\x33\x88\x86\x04\xf6\xb5\xf0" + "\x47\x39\x17\xc1\x40\x2b\x80\x09" + "\x9d\xca\x5c\xbc\x20\x70\x75\xc0", + .klen = 32, + .iv = "\x00\x00\x00\x00\x00\x00\x00\x00" + "\x00\x00\x00\x01\x31\x58\xa3\x5a" + "\x25\x5d\x05\x17\x58\xe9\x5e\xd4" + "\x1c\x00\x00\x00\x00\x00\x00\x00", + .ptext = "\x49\xee\xe0\xdc\x24\x90\x40\xcd" + "\xc5\x40\x8f\x47\x05\xbc\xdd\x81" + "\x47\xc6\x8d\xe6\xb1\x8f\xd7\xcb" + "\x09\x0e\x6e\x22\x48\x1f\xbf\xb8" + "\x5c\xf7\x1e\x8a\xc1\x23\xf2\xd4" + "\x19\x4b\x01\x0f\x4e\xa4\x43\xce" + "\x01\xc6\x67\xda\x03\x91\x18\x90" + "\xa5\xa4\x8e\x45\x03\xb3\x2d\xac" + "\x74\x92\xd3\x53\x47\xc8\xdd\x25" + "\x53\x6c\x02\x03\x87\x0d\x11\x0c" + "\x58\xe3\x12\x18\xfd\x2a\x5b\x40" + "\x0c\x30\xf0\xb8\x3f\x43\xce\xae" + "\x65\x3a\x7d\x7c\xf4\x54\xaa\xcc" + "\x33\x97\xc3\x77\xba\xc5\x70\xde" + "\xd7\xd5\x13\xa5\x65\xc4\x5f\x0f" + "\x46\x1a\x0d\x97\xb5\xf3\xbb\x3c" + "\x84\x0f\x2b\xc5\xaa\xea\xf2\x6c" + "\xc9\xb5\x0c\xee\x15\xf3\x7d\xbe" + "\x9f\x7b\x5a\xa6\xae\x4f\x83\xb6" + "\x79\x49\x41\xf4\x58\x18\xcb\x86" + "\x7f\x30\x0e\xf8\x7d\x44\x36\xea" + "\x75\xeb\x88\x84\x40\x3c\xad\x4f" + "\x6f\x31\x6b\xaa\x5d\xe5\xa5\xc5" + "\x21\x66\xe9\xa7\xe3\xb2\x15\x88" + "\x78\xf6\x79\xa1\x59\x47\x12\x4e" + "\x9f\x9f\x64\x1a\xa0\x22\x5b\x08" + "\xbe\x7c\x36\xc2\x2b\x66\x33\x1b" + "\xdd\x60\x71\xf7\x47\x8c\x61\xc3" + "\xda\x8a\x78\x1e\x16\xfa\x1e\x86" + "\x81\xa6\x17\x2a\xa7\xb5\xc2\xe7" + "\xa4\xc7\x42\xf1\xcf\x6a\xca\xb4" + "\x45\xcf\xf3\x93\xf0\xe7\xea\xf6" + "\xf4\xe6\x33\x43\x84\x93\xa5\x67" + "\x9b\x16\x58\x58\x80\x0f\x2b\x5c" + "\x24\x74\x75\x7f\x95\x81\xb7\x30" + "\x7a\x33\xa7\xf7\x94\x87\x32\x27" + "\x10\x5d\x14\x4c\x43\x29\xdd\x26" + "\xbd\x3e\x3c\x0e\xfe\x0e\xa5\x10" + "\xea\x6b\x64\xfd\x73\xc6\xed\xec" + "\xa8\xc9\xbf\xb3\xba\x0b\x4d\x07" + "\x70\xfc\x16\xfd\x79\x1e\xd7\xc5" + "\x49\x4e\x1c\x8b\x8d\x79\x1b\xb1" + "\xec\xca\x60\x09\x4c\x6a\xd5\x09" + "\x49\x46\x00\x88\x22\x8d\xce\xea" + "\xb1\x17\x11\xde\x42\xd2\x23\xc1" + "\x72\x11\xf5\x50\x73\x04\x40\x47" + "\xf9\x5d\xe7\xa7\x26\xb1\x7e\xb0" + "\x3f\x58\xc1\x52\xab\x12\x67\x9d" + "\x3f\x43\x4b\x68\xd4\x9c\x68\x38" + "\x07\x8a\x2d\x3e\xf3\xaf\x6a\x4b" + "\xf9\xe5\x31\x69\x22\xf9\xa6\x69" + "\xc6\x9c\x96\x9a\x12\x35\x95\x1d" + "\x95\xd5\xdd\xbe\xbf\x93\x53\x24" + "\xfd\xeb\xc2\x0a\x64\xb0\x77\x00" + "\x6f\x88\xc4\x37\x18\x69\x7c\xd7" + "\x41\x92\x55\x4c\x03\xa1\x9a\x4b" + "\x15\xe5\xdf\x7f\x37\x33\x72\xc1" + "\x8b\x10\x67\xa3\x01\x57\x94\x25" + "\x7b\x38\x71\x7e\xdd\x1e\xcc\x73" + "\x55\xd2\x8e\xeb\x07\xdd\xf1\xda" + "\x58\xb1\x47\x90\xfe\x42\x21\x72" + "\xa3\x54\x7a\xa0\x40\xec\x9f\xdd" + "\xc6\x84\x6e\xca\xae\xe3\x68\xb4" + "\x9d\xe4\x78\xff\x57\xf2\xf8\x1b" + "\x03\xa1\x31\xd9\xde\x8d\xf5\x22" + "\x9c\xdd\x20\xa4\x1e\x27\xb1\x76" + "\x4f\x44\x55\xe2\x9b\xa1\x9c\xfe" + "\x54\xf7\x27\x1b\xf4\xde\x02\xf5" + "\x1b\x55\x48\x5c\xdc\x21\x4b\x9e" + "\x4b\x6e\xed\x46\x23\xdc\x65\xb2" + "\xcf\x79\x5f\x28\xe0\x9e\x8b\xe7" + "\x4c\x9d\x8a\xff\xc1\xa6\x28\xb8" + "\x65\x69\x8a\x45\x29\xef\x74\x85" + "\xde\x79\xc7\x08\xae\x30\xb0\xf4" + "\xa3\x1d\x51\x41\xab\xce\xcb\xf6" + "\xb5\xd8\x6d\xe0\x85\xe1\x98\xb3" + "\x43\xbb\x86\x83\x0a\xa0\xf5\xb7" + "\x04\x0b\xfa\x71\x1f\xb0\xf6\xd9" + "\x13\x00\x15\xf0\xc7\xeb\x0d\x5a" + "\x9f\xd7\xb9\x6c\x65\x14\x22\x45" + "\x6e\x45\x32\x3e\x7e\x60\x1a\x12" + "\x97\x82\x14\xfb\xaa\x04\x22\xfa" + "\xa0\xe5\x7e\x8c\x78\x02\x48\x5d" + "\x78\x33\x5a\x7c\xad\xdb\x29\xce" + "\xbb\x8b\x61\xa4\xb7\x42\xe2\xac" + "\x8b\x1a\xd9\x2f\x0b\x8b\x62\x21" + "\x83\x35\x7e\xad\x73\xc2\xb5\x6c" + "\x10\x26\x38\x07\xe5\xc7\x36\x80" + "\xe2\x23\x12\x61\xf5\x48\x4b\x2b" + "\xc5\xdf\x15\xd9\x87\x01\xaa\xac" + "\x1e\x7c\xad\x73\x78\x18\x63\xe0" + "\x8b\x9f\x81\xd8\x12\x6a\x28\x10" + "\xbe\x04\x68\x8a\x09\x7c\x1b\x1c" + "\x83\x66\x80\x47\x80\xe8\xfd\x35" + "\x1c\x97\x6f\xae\x49\x10\x66\xcc" + "\xc6\xd8\xcc\x3a\x84\x91\x20\x77" + "\x72\xe4\x24\xd2\x37\x9f\xc5\xc9" + "\x25\x94\x10\x5f\x40\x00\x64\x99" + "\xdc\xae\xd7\x21\x09\x78\x50\x15" + "\xac\x5f\xc6\x2c\xa2\x0b\xa9\x39" + "\x87\x6e\x6d\xab\xde\x08\x51\x16" + "\xc7\x13\xe9\xea\xed\x06\x8e\x2c" + "\xf8\x37\x8c\xf0\xa6\x96\x8d\x43" + "\xb6\x98\x37\xb2\x43\xed\xde\xdf" + "\x89\x1a\xe7\xeb\x9d\xa1\x7b\x0b" + "\x77\xb0\xe2\x75\xc0\xf1\x98\xd9" + "\x80\x55\xc9\x34\x91\xd1\x59\xe8" + "\x4b\x0f\xc1\xa9\x4b\x7a\x84\x06" + "\x20\xa8\x5d\xfa\xd1\xde\x70\x56" + "\x2f\x9e\x91\x9c\x20\xb3\x24\xd8" + "\x84\x3d\xe1\x8c\x7e\x62\x52\xe5" + "\x44\x4b\x9f\xc2\x93\x03\xea\x2b" + "\x59\xc5\xfa\x3f\x91\x2b\xbb\x23" + "\xf5\xb2\x7b\xf5\x38\xaf\xb3\xee" + "\x63\xdc\x7b\xd1\xff\xaa\x8b\xab" + "\x82\x6b\x37\x04\xeb\x74\xbe\x79" + "\xb9\x83\x90\xef\x20\x59\x46\xff" + "\xe9\x97\x3e\x2f\xee\xb6\x64\x18" + "\x38\x4c\x7a\x4a\xf9\x61\xe8\x9a" + "\xa1\xb5\x01\xa6\x47\xd3\x11\xd4" + "\xce\xd3\x91\x49\x88\xc7\xb8\x4d" + "\xb1\xb9\x07\x6d\x16\x72\xae\x46" + "\x5e\x03\xa1\x4b\xb6\x02\x30\xa8" + "\x3d\xa9\x07\x2a\x7c\x19\xe7\x62" + "\x87\xe3\x82\x2f\x6f\xe1\x09\xd9" + "\x94\x97\xea\xdd\x58\x9e\xae\x76" + "\x7e\x35\xe5\xb4\xda\x7e\xf4\xde" + "\xf7\x32\x87\xcd\x93\xbf\x11\x56" + "\x11\xbe\x08\x74\xe1\x69\xad\xe2" + "\xd7\xf8\x86\x75\x8a\x3c\xa4\xbe" + "\x70\xa7\x1b\xfc\x0b\x44\x2a\x76" + "\x35\xea\x5d\x85\x81\xaf\x85\xeb" + "\xa0\x1c\x61\xc2\xf7\x4f\xa5\xdc" + "\x02\x7f\xf6\x95\x40\x6e\x8a\x9a" + "\xf3\x5d\x25\x6e\x14\x3a\x22\xc9" + "\x37\x1c\xeb\x46\x54\x3f\xa5\x91" + "\xc2\xb5\x8c\xfe\x53\x08\x97\x32" + "\x1b\xb2\x30\x27\xfe\x25\x5d\xdc" + "\x08\x87\xd0\xe5\x94\x1a\xd4\xf1" + "\xfe\xd6\xb4\xa3\xe6\x74\x81\x3c" + "\x1b\xb7\x31\xa7\x22\xfd\xd4\xdd" + "\x20\x4e\x7c\x51\xb0\x60\x73\xb8" + "\x9c\xac\x91\x90\x7e\x01\xb0\xe1" + "\x8a\x2f\x75\x1c\x53\x2a\x98\x2a" + "\x06\x52\x95\x52\xb2\xe9\x25\x2e" + "\x4c\xe2\x5a\x00\xb2\x13\x81\x03" + "\x77\x66\x0d\xa5\x99\xda\x4e\x8c" + "\xac\xf3\x13\x53\x27\x45\xaf\x64" + "\x46\xdc\xea\x23\xda\x97\xd1\xab" + "\x7d\x6c\x30\x96\x1f\xbc\x06\x34" + "\x18\x0b\x5e\x21\x35\x11\x8d\x4c" + "\xe0\x2d\xe9\x50\x16\x74\x81\xa8" + "\xb4\x34\xb9\x72\x42\xa6\xcc\xbc" + "\xca\x34\x83\x27\x10\x5b\x68\x45" + "\x8f\x52\x22\x0c\x55\x3d\x29\x7c" + "\xe3\xc0\x66\x05\x42\x91\x5f\x58" + "\xfe\x4a\x62\xd9\x8c\xa9\x04\x19" + "\x04\xa9\x08\x4b\x57\xfc\x67\x53" + "\x08\x7c\xbc\x66\x8a\xb0\xb6\x9f" + "\x92\xd6\x41\x7c\x5b\x2a\x00\x79" + "\x72", + .ctext = "\x3a\x92\xee\x53\x31\xaf\x2b\x60" + "\x5f\x55\x8d\x00\x5d\xfc\x74\x97" + "\x28\x54\xf4\xa5\x75\xf1\x9b\x25" + "\x62\x1c\xc0\xe0\x13\xc8\x87\x53" + "\xd0\xf3\xa7\x97\x1f\x3b\x1e\xea" + "\xe0\xe5\x2a\xd1\xdd\xa4\x3b\x50" + "\x45\xa3\x0d\x7e\x1b\xc9\xa0\xad" + "\xb9\x2c\x54\xa6\xc7\x55\x16\xd0" + "\xc5\x2e\x02\x44\x35\xd0\x7e\x67" + "\xf2\xc4\x9b\xcd\x95\x10\xcc\x29" + "\x4b\xfa\x86\x87\xbe\x40\x36\xbe" + "\xe1\xa3\x52\x89\x55\x20\x9b\xc2" + "\xab\xf2\x31\x34\x16\xad\xc8\x17" + "\x65\x24\xc0\xff\x12\x37\xfe\x5a" + "\x62\x3b\x59\x47\x6c\x5f\x3a\x8e" + "\x3b\xd9\x30\xc8\x7f\x2f\x88\xda" + "\x80\xfd\x02\xda\x7f\x9a\x7a\x73" + "\x59\xc5\x34\x09\x9a\x11\xcb\xa7" + "\xfc\xf6\xa1\xa0\x60\xfb\x43\xbb" + "\xf1\xe9\xd7\xc6\x79\x27\x4e\xff" + "\x22\xb4\x24\xbf\x76\xee\x47\xb9" + "\x6d\x3f\x8b\xb0\x9c\x3c\x43\xdd" + "\xff\x25\x2e\x6d\xa4\x2b\xfb\x5d" + "\x1b\x97\x6c\x55\x0a\x82\x7a\x7b" + "\x94\x34\xc2\xdb\x2f\x1f\xc1\xea" + "\xd4\x4d\x17\x46\x3b\x51\x69\x09" + "\xe4\x99\x32\x25\xfd\x94\xaf\xfb" + "\x10\xf7\x4f\xdd\x0b\x3c\x8b\x41" + "\xb3\x6a\xb7\xd1\x33\xa8\x0c\x2f" + "\x62\x4c\x72\x11\xd7\x74\xe1\x3b" + "\x38\x43\x66\x7b\x6c\x36\x48\xe7" + "\xe3\xe7\x9d\xb9\x42\x73\x7a\x2a" + "\x89\x20\x1a\x41\x80\x03\xf7\x8f" + "\x61\x78\x13\xbf\xfe\x50\xf5\x04" + "\x52\xf9\xac\x47\xf8\x62\x4b\xb2" + "\x24\xa9\xbf\x64\xb0\x18\x69\xd2" + "\xf5\xe4\xce\xc8\xb1\x87\x75\xd6" + "\x2c\x24\x79\x00\x7d\x26\xfb\x44" + "\xe7\x45\x7a\xee\x58\xa5\x83\xc1" + "\xb4\x24\xab\x23\x2f\x4d\xd7\x4f" + "\x1c\xc7\xaa\xa9\x50\xf4\xa3\x07" + "\x12\x13\x89\x74\xdc\x31\x6a\xb2" + "\xf5\x0f\x13\x8b\xb9\xdb\x85\x1f" + "\xf5\xbc\x88\xd9\x95\xea\x31\x6c" + "\x36\x60\xb6\x49\xdc\xc4\xf7\x55" + "\x3f\x21\xc1\xb5\x92\x18\x5e\xbc" + "\x9f\x87\x7f\xe7\x79\x25\x40\x33" + "\xd6\xb9\x33\xd5\x50\xb3\xc7\x89" + "\x1b\x12\xa0\x46\xdd\xa7\xd8\x3e" + "\x71\xeb\x6f\x66\xa1\x26\x0c\x67" + "\xab\xb2\x38\x58\x17\xd8\x44\x3b" + "\x16\xf0\x8e\x62\x8d\x16\x10\x00" + "\x32\x8b\xef\xb9\x28\xd3\xc5\xad" + "\x0a\x19\xa2\xe4\x03\x27\x7d\x94" + "\x06\x18\xcd\xd6\x27\x00\xf9\x1f" + "\xb6\xb3\xfe\x96\x35\x5f\xc4\x1c" + "\x07\x62\x10\x79\x68\x50\xf1\x7e" + "\x29\xe7\xc4\xc4\xe7\xee\x54\xd6" + "\x58\x76\x84\x6d\x8d\xe4\x59\x31" + "\xe9\xf4\xdc\xa1\x1f\xe5\x1a\xd6" + "\xe6\x64\x46\xf5\x77\x9c\x60\x7a" + "\x5e\x62\xe3\x0a\xd4\x9f\x7a\x2d" + "\x7a\xa5\x0a\x7b\x29\x86\x7a\x74" + "\x74\x71\x6b\xca\x7d\x1d\xaa\xba" + "\x39\x84\x43\x76\x35\xfe\x4f\x9b" + "\xbb\xbb\xb5\x6a\x32\xb5\x5d\x41" + "\x51\xf0\x5b\x68\x03\x47\x4b\x8a" + "\xca\x88\xf6\x37\xbd\x73\x51\x70" + "\x66\xfe\x9e\x5f\x21\x9c\xf3\xdd" + "\xc3\xea\x27\xf9\x64\x94\xe1\x19" + "\xa0\xa9\xab\x60\xe0\x0e\xf7\x78" + "\x70\x86\xeb\xe0\xd1\x5c\x05\xd3" + "\xd7\xca\xe0\xc0\x47\x47\x34\xee" + "\x11\xa3\xa3\x54\x98\xb7\x49\x8e" + "\x84\x28\x70\x2c\x9e\xfb\x55\x54" + "\x4d\xf8\x86\xf7\x85\x7c\xbd\xf3" + "\x17\xd8\x47\xcb\xac\xf4\x20\x85" + "\x34\x66\xad\x37\x2d\x5e\x52\xda" + "\x8a\xfe\x98\x55\x30\xe7\x2d\x2b" + "\x19\x10\x8e\x7b\x66\x5e\xdc\xe0" + "\x45\x1f\x7b\xb4\x08\xfb\x8f\xf6" + "\x8c\x89\x21\x34\x55\x27\xb2\x76" + "\xb2\x07\xd9\xd6\x68\x9b\xea\x6b" + "\x2d\xb4\xc4\x35\xdd\xd2\x79\xae" + "\xc7\xd6\x26\x7f\x12\x01\x8c\xa7" + "\xe3\xdb\xa8\xf4\xf7\x2b\xec\x99" + "\x11\x00\xf1\x35\x8c\xcf\xd5\xc9" + "\xbd\x91\x36\x39\x70\xcf\x7d\x70" + "\x47\x1a\xfc\x6b\x56\xe0\x3f\x9c" + "\x60\x49\x01\x72\xa9\xaf\x2c\x9c" + "\xe8\xab\xda\x8c\x14\x19\xf3\x75" + "\x07\x17\x9d\x44\x67\x7a\x2e\xef" + "\xb7\x83\x35\x4a\xd1\x3d\x1c\x84" + "\x32\xdd\xaa\xea\xca\x1d\xdc\x72" + "\x2c\xcc\x43\xcd\x5d\xe3\x21\xa4" + "\xd0\x8a\x4b\x20\x12\xa3\xd5\x86" + "\x76\x96\xff\x5f\x04\x57\x0f\xe6" + "\xba\xe8\x76\x50\x0c\x64\x1d\x83" + "\x9c\x9b\x9a\x9a\x58\x97\x9c\x5c" + "\xb4\xa4\xa6\x3e\x19\xeb\x8f\x5a" + "\x61\xb2\x03\x7b\x35\x19\xbe\xa7" + "\x63\x0c\xfd\xdd\xf9\x90\x6c\x08" + "\x19\x11\xd3\x65\x4a\xf5\x96\x92" + "\x59\xaa\x9c\x61\x0c\x29\xa7\xf8" + "\x14\x39\x37\xbf\x3c\xf2\x16\x72" + "\x02\xfa\xa2\xf3\x18\x67\x5d\xcb" + "\xdc\x4d\xbb\x96\xff\x70\x08\x2d" + "\xc2\xa8\x52\xe1\x34\x5f\x72\xfe" + "\x64\xbf\xca\xa7\x74\x38\xfb\x74" + "\x55\x9c\xfa\x8a\xed\xfb\x98\xeb" + "\x58\x2e\x6c\xe1\x52\x76\x86\xd7" + "\xcf\xa1\xa4\xfc\xb2\x47\x41\x28" + "\xa3\xc1\xe5\xfd\x53\x19\x28\x2b" + "\x37\x04\x65\x96\x99\x7a\x28\x0f" + "\x07\x68\x4b\xc7\x52\x0a\x55\x35" + "\x40\x19\x95\x61\xe8\x59\x40\x1f" + "\x9d\xbf\x78\x7d\x8f\x84\xff\x6f" + "\xd0\xd5\x63\xd2\x22\xbd\xc8\x4e" + "\xfb\xe7\x9f\x06\xe6\xe7\x39\x6d" + "\x6a\x96\x9f\xf0\x74\x7e\xc9\x35" + "\xb7\x26\xb8\x1c\x0a\xa6\x27\x2c" + "\xa2\x2b\xfe\xbe\x0f\x07\x73\xae" + "\x7f\x7f\x54\xf5\x7c\x6a\x0a\x56" + "\x49\xd4\x81\xe5\x85\x53\x99\x1f" + "\x95\x05\x13\x58\x8d\x0e\x1b\x90" + "\xc3\x75\x48\x64\x58\x98\x67\x84" + "\xae\xe2\x21\xa2\x8a\x04\x0a\x0b" + "\x61\xaa\xb0\xd4\x28\x60\x7a\xf8" + "\xbc\x52\xfb\x24\x7f\xed\x0d\x2a" + "\x0a\xb2\xf9\xc6\x95\xb5\x11\xc9" + "\xf4\x0f\x26\x11\xcf\x2a\x57\x87" + "\x7a\xf3\xe7\x94\x65\xc2\xb5\xb3" + "\xab\x98\xe3\xc1\x2b\x59\x19\x7c" + "\xd6\xf3\xf9\xbf\xff\x6d\xc6\x82" + "\x13\x2f\x4a\x2e\xcd\x26\xfe\x2d" + "\x01\x70\xf4\xc2\x7f\x1f\x4c\xcb" + "\x47\x77\x0c\xa0\xa3\x03\xec\xda" + "\xa9\xbf\x0d\x2d\xae\xe4\xb8\x7b" + "\xa9\xbc\x08\xb4\x68\x2e\xc5\x60" + "\x8d\x87\x41\x2b\x0f\x69\xf0\xaf" + "\x5f\xba\x72\x20\x0f\x33\xcd\x6d" + "\x36\x7d\x7b\xd5\x05\xf1\x4b\x05" + "\xc4\xfc\x7f\x80\xb9\x4d\xbd\xf7" + "\x7c\x84\x07\x01\xc2\x40\x66\x5b" + "\x98\xc7\x2c\xe3\x97\xfa\xdf\x87" + "\xa0\x1f\xe9\x21\x42\x0f\x3b\xeb" + "\x89\x1c\x3b\xca\x83\x61\x77\x68" + "\x84\xbb\x60\x87\x38\x2e\x25\xd5" + "\x9e\x04\x41\x70\xac\xda\xc0\x9c" + "\x9c\x69\xea\x8d\x4e\x55\x2a\x29" + "\xed\x05\x4b\x7b\x73\x71\x90\x59" + "\x4d\xc8\xd8\x44\xf0\x4c\xe1\x5e" + "\x84\x47\x55\xcc\x32\x3f\xe7\x97" + "\x42\xc6\x32\xac\x40\xe5\xa5\xc7" + "\x8b\xed\xdb\xf7\x83\xd6\xb1\xc2" + "\x52\x5e\x34\xb7\xeb\x6e\xd9\xfc" + "\xe5\x93\x9a\x97\x3e\xb0\xdc\xd9" + "\xd7\x06\x10\xb6\x1d\x80\x59\xdd" + "\x0d\xfe\x64\x35\xcd\x5d\xec\xf0" + "\xba\xd0\x34\xc9\x2d\x91\xc5\x17" + "\x11", + .len = 1281, + .also_non_np = 1, + .np = 3, + .tap = { 1200, 1, 80 }, + }, +}; + /* * CTS (Cipher Text Stealing) mode tests */ diff --git a/include/crypto/chacha20.h b/include/crypto/chacha20.h index fbec4e6a8789..6290d997060e 100644 --- a/include/crypto/chacha20.h +++ b/include/crypto/chacha20.h @@ -1,6 +1,10 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* - * Common values for the ChaCha20 algorithm + * Common values and helper functions for the ChaCha20 and XChaCha20 algorithms. + * + * XChaCha20 extends ChaCha20's nonce to 192 bits, while provably retaining + * ChaCha20's security. Here they share the same key size, tfm context, and + * setkey function; only their IV size and encrypt/decrypt function differ. */ #ifndef _CRYPTO_CHACHA20_H @@ -10,10 +14,15 @@ #include #include +/* 32-bit stream position, then 96-bit nonce (RFC7539 convention) */ #define CHACHA20_IV_SIZE 16 + #define CHACHA20_KEY_SIZE 32 #define CHACHA20_BLOCK_SIZE 64 +/* 192-bit nonce, then 64-bit stream position */ +#define XCHACHA20_IV_SIZE 32 + struct chacha20_ctx { u32 key[8]; }; @@ -22,8 +31,11 @@ void chacha20_block(u32 *state, u8 *stream); void hchacha20_block(const u32 *in, u32 *out); void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv); + int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keysize); + int crypto_chacha20_crypt(struct skcipher_request *req); +int crypto_xchacha20_crypt(struct skcipher_request *req); #endif