| Message ID | 20181015175424.97147-3-ebiggers@kernel.org (mailing list archive) |
|---|---|
| State | RFC |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | crypto: Adiantum support | expand |
On 16 October 2018 at 01:54, Eric Biggers <ebiggers@kernel.org> wrote: > From: Eric Biggers <ebiggers@google.com> > > 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. > > Signed-off-by: Eric Biggers <ebiggers@google.com> One nit below but that should be fixed separately, so Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> > --- > 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 f7a235db56aaa..d9acbce23d4d5 100644 > --- a/crypto/Kconfig > +++ b/crypto/Kconfig > @@ -1387,18 +1387,22 @@ config CRYPTO_SALSA20 > Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html> > > 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: > <http://cr.yp.to/chacha/chacha-20080128.pdf> > > + 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: > + <https://cr.yp.to/snuffle/xsalsa-20081128.pdf> > + > 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 3ae96587caf9a..07902fe37aeb8 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, true); > + We shouldn't be calling skcipher_walk_virt() here with atomic set to true, but that is an existing issue so perhaps you could include a separate patch to fix that? > + 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, true); > > - 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 <martin@strongswan.org>"); > -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 b1f79c6bf4096..a5512e69c8f31 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 1fe7b97ba03f9..371641c73cf8c 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 fbec4e6a87890..6290d997060ec 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 <linux/types.h> > #include <linux/crypto.h> > > +/* 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 > -- > 2.19.1.331.ge82ca0e54c-goog >
diff --git a/crypto/Kconfig b/crypto/Kconfig index f7a235db56aaa..d9acbce23d4d5 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1387,18 +1387,22 @@ config CRYPTO_SALSA20 Bernstein <djb@cr.yp.to>. See <http://cr.yp.to/snuffle.html> 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: <http://cr.yp.to/chacha/chacha-20080128.pdf> + 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: + <https://cr.yp.to/snuffle/xsalsa-20081128.pdf> + 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 3ae96587caf9a..07902fe37aeb8 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, true); + + 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, true); - 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 <martin@strongswan.org>"); -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 b1f79c6bf4096..a5512e69c8f31 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 1fe7b97ba03f9..371641c73cf8c 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 fbec4e6a87890..6290d997060ec 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 <linux/types.h> #include <linux/crypto.h> +/* 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