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Implement SHA-224 and HMAC-SHA224.

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This commit is contained in:
Dag-Erling Smørgrav 2014-07-11 13:33:58 +00:00 committed by des
parent 25e162687e
commit 2c697a472b
12 changed files with 1133 additions and 8 deletions
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2
include/cryb/Makefile.am
View file

@ -9,6 +9,7 @@ cryb_HEADERS = \
digest.h \
hmac.h \
hmac_sha1.h \
hmac_sha224.h \
hmac_sha256.h \
hmac_sha384.h \
hmac_sha512.h \
@ -25,6 +26,7 @@ cryb_HEADERS = \
rfc4648.h \
sha.h \
sha1.h \
sha224.h \
sha256.h \
sha384.h \
sha512.h \

1
include/cryb/hmac.h
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@ -33,6 +33,7 @@
#define CRYB_HMAC_H_INCLUDED
#include <cryb/hmac_sha1.h>
#include <cryb/hmac_sha224.h>
#include <cryb/hmac_sha256.h>
#include <cryb/hmac_sha384.h>
#include <cryb/hmac_sha512.h>

55
include/cryb/hmac_sha224.h Normal file
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@ -0,0 +1,55 @@
/*-
* Copyright (c) 2012-2014 The University of Oslo
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Cryb$
*/
#ifndef CRYB_HMAC_SHA224_H_INCLUDED
#define CRYB_HMAC_SHA224_H_INCLUDED
#include <cryb/sha224.h>
#define HMAC_SHA224_MAC_LEN 28
#define hmac_sha224_ctx cryb_hmac_sha224_ctx
#define hmac_sha224_init cryb_hmac_sha224_init
#define hmac_sha224_update cryb_hmac_sha224_update
#define hmac_sha224_final cryb_hmac_sha224_final
#define hmac_sha224_complete cryb_hmac_sha224_complete
typedef struct {
sha224_ctx ictx;
sha224_ctx octx;
} hmac_sha224_ctx;
void hmac_sha224_init(hmac_sha224_ctx *, const void *, size_t);
void hmac_sha224_update(hmac_sha224_ctx *, const void *, size_t);
void hmac_sha224_final(hmac_sha224_ctx *, void *);
void hmac_sha224_complete(const void *, size_t, const void *, size_t, void *);
#endif

90
include/cryb/sha224.h Normal file
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@ -0,0 +1,90 @@
/*-
* Copyright (c) 2005-2013 Colin Percival
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Cryb$
*/
#ifndef CRYB_SHA224_H_INCLUDED
#define CRYB_SHA224_H_INCLUDED
#include <cryb/digest.h>
#define SHA224_BLOCK_LEN 64
#define SHA224_DIGEST_LEN 28
/*
* Use #defines in order to avoid namespace collisions with anyone else's
* SHA224 code (e.g., the code in OpenSSL).
*/
#define sha224_digest cryb_sha224_digest
#define sha224_ctx cryb_sha224_ctx
#define sha224_init cryb_sha224_init
#define sha224_update cryb_sha224_update
#define sha224_final cryb_sha224_final
#define sha224_complete cryb_sha224_complete
extern digest_algorithm sha224_digest;
/* Context structure for SHA224 operations. */
typedef struct {
uint32_t state[8];
uint64_t count;
uint8_t buf[64];
} sha224_ctx;
/**
* sha224_init(ctx):
* Initialize the SHA224 context ${ctx}.
*/
void sha224_init(sha224_ctx *);
/**
* sha224_update(ctx, in, len):
* Input ${len} bytes from ${in} into the SHA224 context ${ctx}.
*/
void sha224_update(sha224_ctx *, const void *, size_t);
/**
* sha224_final(ctx, digest):
* Output the SHA224 hash of the data input to the context ${ctx} into the
* buffer ${digest}.
*/
void sha224_final(sha224_ctx *, uint8_t[SHA224_DIGEST_LEN]);
/**
* sha224_complete(in, len, digest):
* Compute the SHA224 hash of ${len} bytes from $in} and write it to ${digest}.
*/
void sha224_complete(const void *, size_t, uint8_t[SHA224_DIGEST_LEN]);
/**
* PBKDF2_SHA224(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
* Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA224 as the PRF, and
* write the output to buf. The value dkLen must be at most 32 * (2^32 - 1).
*/
void pbkdf2_sha224(const uint8_t *, size_t, const uint8_t *, size_t,
uint64_t, uint8_t *, size_t);
#endif

1
lib/digest/Makefile.am
View file

@ -9,6 +9,7 @@ libcryb_digest_la_SOURCES = \
md4.c \
md5.c \
sha1.c \
sha224.c \
sha256.c \
sha384.c \
sha512.c

387
lib/digest/sha224.c Normal file
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@ -0,0 +1,387 @@
/*-
* Copyright (c) 2005-2013 Colin Percival
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Cryb$
*/
#include "cryb/impl.h"
#ifdef HAVE_SYS_ENDIAN_H
#include <sys/endian.h>
#endif
#ifdef HAVE_ENDIAN_H
#define _BSD_SOURCE
#include <endian.h>
#endif
#include <stdint.h>
#include <string.h>
#include <cryb/sha224.h>
/*
* Encode a length len/4 vector of (uint32_t) into a length len vector of
* (uint8_t) in big-endian form. Assumes len is a multiple of 4.
*/
static void
be32enc_vect(uint8_t *dst, const uint32_t *src, size_t len)
{
size_t i;
for (i = 0; i < len / 4; i++)
be32enc(dst + i * 4, src[i]);
}
/*
* Decode a big-endian length len vector of (uint8_t) into a length
* len/4 vector of (uint32_t). Assumes len is a multiple of 4.
*/
static void
be32dec_vect(uint32_t *dst, const uint8_t *src, size_t len)
{
size_t i;
for (i = 0; i < len / 4; i++)
dst[i] = be32dec(src + i * 4);
}
/* Elementary functions used by SHA224 */
#define Ch(x, y, z) ((x & (y ^ z)) ^ z)
#define Maj(x, y, z) ((x & (y | z)) | (y & z))
#define SHR(x, n) (x >> n)
#define ROTR(x, n) ((x >> n) | (x << (32 - n)))
#define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
#define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
/* SHA224 round function */
#define RND(a, b, c, d, e, f, g, h, k) \
t0 = h + S1(e) + Ch(e, f, g) + k; \
t1 = S0(a) + Maj(a, b, c); \
d += t0; \
h = t0 + t1;
/* Adjusted round function for rotating state */
#define RNDr(S, W, i, k) \
RND(S[(64 - i) % 8], S[(65 - i) % 8], \
S[(66 - i) % 8], S[(67 - i) % 8], \
S[(68 - i) % 8], S[(69 - i) % 8], \
S[(70 - i) % 8], S[(71 - i) % 8], \
W[i] + k)
/*
* SHA224 block compression function. The 256-bit state is transformed via
* the 512-bit input block to produce a new state.
*/
static void
sha224_Transform(uint32_t * state, const uint8_t block[64])
{
uint32_t W[64];
uint32_t S[8];
uint32_t t0, t1;
int i;
/* 1. Prepare message schedule W. */
be32dec_vect(W, block, 64);
for (i = 16; i < 64; i++)
W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16];
/* 2. Initialize working variables. */
memcpy(S, state, 32);
/* 3. Mix. */
RNDr(S, W, 0, 0x428a2f98);
RNDr(S, W, 1, 0x71374491);
RNDr(S, W, 2, 0xb5c0fbcf);
RNDr(S, W, 3, 0xe9b5dba5);
RNDr(S, W, 4, 0x3956c25b);
RNDr(S, W, 5, 0x59f111f1);
RNDr(S, W, 6, 0x923f82a4);
RNDr(S, W, 7, 0xab1c5ed5);
RNDr(S, W, 8, 0xd807aa98);
RNDr(S, W, 9, 0x12835b01);
RNDr(S, W, 10, 0x243185be);
RNDr(S, W, 11, 0x550c7dc3);
RNDr(S, W, 12, 0x72be5d74);
RNDr(S, W, 13, 0x80deb1fe);
RNDr(S, W, 14, 0x9bdc06a7);
RNDr(S, W, 15, 0xc19bf174);
RNDr(S, W, 16, 0xe49b69c1);
RNDr(S, W, 17, 0xefbe4786);
RNDr(S, W, 18, 0x0fc19dc6);
RNDr(S, W, 19, 0x240ca1cc);
RNDr(S, W, 20, 0x2de92c6f);
RNDr(S, W, 21, 0x4a7484aa);
RNDr(S, W, 22, 0x5cb0a9dc);
RNDr(S, W, 23, 0x76f988da);
RNDr(S, W, 24, 0x983e5152);
RNDr(S, W, 25, 0xa831c66d);
RNDr(S, W, 26, 0xb00327c8);
RNDr(S, W, 27, 0xbf597fc7);
RNDr(S, W, 28, 0xc6e00bf3);
RNDr(S, W, 29, 0xd5a79147);
RNDr(S, W, 30, 0x06ca6351);
RNDr(S, W, 31, 0x14292967);
RNDr(S, W, 32, 0x27b70a85);
RNDr(S, W, 33, 0x2e1b2138);
RNDr(S, W, 34, 0x4d2c6dfc);
RNDr(S, W, 35, 0x53380d13);
RNDr(S, W, 36, 0x650a7354);
RNDr(S, W, 37, 0x766a0abb);
RNDr(S, W, 38, 0x81c2c92e);
RNDr(S, W, 39, 0x92722c85);
RNDr(S, W, 40, 0xa2bfe8a1);
RNDr(S, W, 41, 0xa81a664b);
RNDr(S, W, 42, 0xc24b8b70);
RNDr(S, W, 43, 0xc76c51a3);
RNDr(S, W, 44, 0xd192e819);
RNDr(S, W, 45, 0xd6990624);
RNDr(S, W, 46, 0xf40e3585);
RNDr(S, W, 47, 0x106aa070);
RNDr(S, W, 48, 0x19a4c116);
RNDr(S, W, 49, 0x1e376c08);
RNDr(S, W, 50, 0x2748774c);
RNDr(S, W, 51, 0x34b0bcb5);
RNDr(S, W, 52, 0x391c0cb3);
RNDr(S, W, 53, 0x4ed8aa4a);
RNDr(S, W, 54, 0x5b9cca4f);
RNDr(S, W, 55, 0x682e6ff3);
RNDr(S, W, 56, 0x748f82ee);
RNDr(S, W, 57, 0x78a5636f);
RNDr(S, W, 58, 0x84c87814);
RNDr(S, W, 59, 0x8cc70208);
RNDr(S, W, 60, 0x90befffa);
RNDr(S, W, 61, 0xa4506ceb);
RNDr(S, W, 62, 0xbef9a3f7);
RNDr(S, W, 63, 0xc67178f2);
/* 4. Mix local working variables into global state. */
for (i = 0; i < 8; i++)
state[i] += S[i];
/* Clean the stack. */
memset(W, 0, 256);
memset(S, 0, 32);
t0 = t1 = 0;
}
static uint8_t PAD[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/* Add padding and terminating bit-count. */
static void
sha224_pad(sha224_ctx * ctx)
{
uint8_t len[8];
uint32_t r, plen;
/*
* Convert length to a vector of bytes -- we do this now rather
* than later because the length will change after we pad.
*/
be64enc(len, ctx->count);
/* Add 1--64 bytes so that the resulting length is 56 mod 64. */
r = (ctx->count >> 3) & 0x3f;
plen = (r < 56) ? (56 - r) : (120 - r);
sha224_update(ctx, PAD, (size_t)plen);
/* Add the terminating bit-count. */
sha224_update(ctx, len, 8);
}
/**
* sha224_init(ctx):
* Initialize the SHA224 context ${ctx}.
*/
void
sha224_init(sha224_ctx * ctx)
{
/* Zero bits processed so far. */
ctx->count = 0;
/* Magic initialization constants. */
ctx->state[0] = 0xc1059ed8;
ctx->state[1] = 0x367cd507;
ctx->state[2] = 0x3070dd17;
ctx->state[3] = 0xf70e5939;
ctx->state[4] = 0xffc00b31;
ctx->state[5] = 0x68581511;
ctx->state[6] = 0x64f98fa7;
ctx->state[7] = 0xbefa4fa4;
}
/**
* sha224_update(ctx, in, len):
* Input ${len} bytes from ${in} into the SHA224 context ${ctx}.
*/
void
sha224_update(sha224_ctx * ctx, const void *in, size_t len)
{
uint32_t r;
const uint8_t *src = in;
/* Return immediately if we have nothing to do. */
if (len == 0)
return;
/* Number of bytes left in the buffer from previous updates. */
r = (ctx->count >> 3) & 0x3f;
/* Update number of bits. */
ctx->count += (uint64_t)(len) << 3;
/* Handle the case where we don't need to perform any transforms. */
if (len < 64 - r) {
memcpy(&ctx->buf[r], src, len);
return;
}
/* Finish the current block. */
memcpy(&ctx->buf[r], src, 64 - r);
sha224_Transform(ctx->state, ctx->buf);
src += 64 - r;
len -= 64 - r;
/* Perform complete blocks. */
while (len >= 64) {
sha224_Transform(ctx->state, src);
src += 64;
len -= 64;
}
/* Copy left over data into buffer. */
memcpy(ctx->buf, src, len);
}
/**
* sha224_final(ctx, digest):
* Output the SHA224 hash of the data input to the context ${ctx} into the
* buffer ${digest}.
*/
void
sha224_final(sha224_ctx * ctx, uint8_t digest[SHA224_DIGEST_LEN])
{
/* Add padding. */
sha224_pad(ctx);
/* Write the hash. */
be32enc_vect(digest, ctx->state, SHA224_DIGEST_LEN);
/* Clear the context state. */
memset((void *)ctx, 0, sizeof(*ctx));
}
/**
* sha224_complete(in, len, digest):
* Compute the SHA224 hash of ${len} bytes from $in} and write it to ${digest}.
*/
void
sha224_complete(const void * in, size_t len, uint8_t digest[SHA224_DIGEST_LEN])
{
sha224_ctx ctx;
sha224_init(&ctx);
sha224_update(&ctx, in, len);
sha224_final(&ctx, digest);
}
#if 0
/**
* PBKDF2_SHA224(passwd, passwdlen, salt, saltlen, c, buf, dkLen):
* Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA224 as the PRF, and
* write the output to buf. The value dkLen must be at most 32 * (2^32 - 1).
*/
void
pbkdf2_sha224(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt,
size_t saltlen, uint64_t c, uint8_t * buf, size_t dkLen)
{
hmac_sha224_ctx PShctx, hctx;
size_t i;
uint8_t ivec[4];
uint8_t U[SHA224_DIGEST_LEN];
uint8_t T[SHA224_DIGEST_LEN];
uint64_t j;
unsigned int k;
size_t clen;
/* Compute HMAC state after processing P and S. */
hmac_sha224_init(&PShctx, passwd, passwdlen);
hmac_sha224_update(&PShctx, salt, saltlen);
/* Iterate through the blocks. */
for (i = 0; i * 32 < dkLen; i++) {
/* Generate INT(i + 1). */
be32enc(ivec, (uint32_t)(i + 1));
/* Compute U_1 = PRF(P, S || INT(i)). */
memcpy(&hctx, &PShctx, sizeof(hmac_sha224_ctx));
hmac_sha224_update(&hctx, ivec, 4);
hmac_sha224_final(&hctx, U);
/* T_i = U_1 ... */
memcpy(T, U, sizeof T);
for (j = 2; j <= c; j++) {
/* Compute U_j. */
hmac_sha224_init(&hctx, passwd, passwdlen);
hmac_sha224_update(&hctx, U, 32);
hmac_sha224_final(&hctx, U);
/* ... xor U_j ... */
for (k = 0; k < sizeof T; k++)
T[k] ^= U[k];
}
/* Copy as many bytes as necessary into buf. */
clen = dkLen - i * 32;
if (clen > 32)
clen = 32;
memcpy(&buf[i * 32], T, clen);
}
/* Clean PShctx, since we never called _final on it. */
memset(&PShctx, 0, sizeof(hmac_sha224_ctx));
}
#endif
digest_algorithm sha224_digest = {
.name = "sha224",
.contextlen = sizeof sha224_digest,
.blocklen = SHA224_BLOCK_LEN,
.digestlen = SHA224_DIGEST_LEN,
.init = (digest_init_func)sha224_init,
.update = (digest_update_func)sha224_update,
.final = (digest_final_func)sha224_final,
.complete = (digest_complete_func)sha224_complete,
};

1
lib/mac/Makefile.am
View file

@ -6,6 +6,7 @@ lib_LTLIBRARIES = libcryb-mac.la
libcryb_mac_la_SOURCES = \
hmac_sha1.c \
hmac_sha224.c \
hmac_sha256.c \
hmac_sha384.c \
hmac_sha512.c

108
lib/mac/hmac_sha224.c Normal file
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@ -0,0 +1,108 @@
/*-
* Copyright (c) 2012 The University of Oslo
* Copyright (c) 2012 Dag-Erling Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Dag-Erling Smørgrav <des@des.no>
* Sponsor: the University of Oslo
*
* $Cryb$
*/
#include "cryb/impl.h"
#ifdef HAVE_SYS_ENDIAN_H
#include <sys/endian.h>
#endif
#ifdef HAVE_ENDIAN_H
#define _BSD_SOURCE
#include <endian.h>
#endif
#include <stdint.h>
#include <string.h>
#include <cryb/hmac_sha224.h>
void
hmac_sha224_init(hmac_sha224_ctx *ctx, const void *key, size_t keylen)
{
uint8_t keybuf[SHA224_BLOCK_LEN], pad[SHA224_BLOCK_LEN];
/* prepare key */
memset(keybuf, 0, sizeof keybuf);
if (keylen > sizeof keybuf)
sha224_complete(key, keylen, keybuf);
else
memcpy(keybuf, key, keylen);
/* input pad */
for (unsigned int i = 0; i < sizeof pad; ++i)
pad[i] = 0x36 ^ keybuf[i];
sha224_init(&ctx->ictx);
sha224_update(&ctx->ictx, pad, sizeof pad);
/* output pad */
for (unsigned int i = 0; i < sizeof pad; ++i)
pad[i] = 0x5c ^ keybuf[i];
sha224_init(&ctx->octx);
sha224_update(&ctx->octx, pad, sizeof pad);
/* hide the evidence */
memset(keybuf, 0, sizeof keybuf);
memset(pad, 0, sizeof pad);
}
void
hmac_sha224_update(hmac_sha224_ctx *ctx, const void *buf, size_t len)
{
sha224_update(&ctx->ictx, buf, len);
}
void
hmac_sha224_final(hmac_sha224_ctx *ctx, void *mac)
{
uint8_t digest[SHA224_DIGEST_LEN];
sha224_final(&ctx->ictx, digest);
sha224_update(&ctx->octx, digest, sizeof digest);
sha224_final(&ctx->octx, mac);
memset(ctx, 0, sizeof *ctx);
}
void
hmac_sha224_complete(const void *key, size_t keylen,
const void *buf, size_t len, void *mac)
{
hmac_sha224_ctx ctx;
hmac_sha224_init(&ctx, key, keylen);
hmac_sha224_update(&ctx, buf, len);
hmac_sha224_final(&ctx, mac);
}

14
t/Makefile.am
View file

@ -61,15 +61,18 @@ t_md5_rsaref_CFLAGS = $(RSAREF_INCLUDES) $(RSAREF_CFLAGS)
t_md5_rsaref_LDADD = $(RSAREF_LDADD)
endif
TESTS += t_sha1 t_sha256 t_sha384 t_sha512
TESTS += t_sha1 t_sha224 t_sha256 t_sha384 t_sha512
if WITH_OPENSSL
TESTS += t_sha1_openssl t_sha256_openssl t_sha384_openssl t_sha512_openssl
TESTS += t_sha1_openssl t_sha224_openssl t_sha256_openssl t_sha384_openssl t_sha512_openssl
t_sha1_openssl_SOURCES = t_sha1.c
t_sha1_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_sha1_openssl_LDADD = $(OPENSSL_LDADD)
t_sha256_openssl_SOURCES = t_sha256.c
t_sha256_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_sha256_openssl_LDADD = $(OPENSSL_LDADD)
t_sha224_openssl_SOURCES = t_sha224.c
t_sha224_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_sha224_openssl_LDADD = $(OPENSSL_LDADD)
t_sha384_openssl_SOURCES = t_sha384.c
t_sha384_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_sha384_openssl_LDADD = $(OPENSSL_LDADD)
@ -79,15 +82,18 @@ t_sha512_openssl_LDADD = $(OPENSSL_LDADD)
endif
# libcryb-mac
TESTS += t_hmac_sha1 t_hmac_sha256 t_hmac_sha384 t_hmac_sha512
TESTS += t_hmac_sha1 t_hmac_sha224 t_hmac_sha256 t_hmac_sha384 t_hmac_sha512
if WITH_OPENSSL
TESTS += t_hmac_sha1_openssl t_hmac_sha256_openssl t_hmac_sha384_openssl t_hmac_sha512_openssl
TESTS += t_hmac_sha1_openssl t_hmac_sha224_openssl t_hmac_sha256_openssl t_hmac_sha384_openssl t_hmac_sha512_openssl
t_hmac_sha1_openssl_SOURCES = t_hmac_sha1.c
t_hmac_sha1_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_hmac_sha1_openssl_LDADD = $(OPENSSL_LDADD)
t_hmac_sha256_openssl_SOURCES = t_hmac_sha256.c
t_hmac_sha256_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_hmac_sha256_openssl_LDADD = $(OPENSSL_LDADD)
t_hmac_sha224_openssl_SOURCES = t_hmac_sha224.c
t_hmac_sha224_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_hmac_sha224_openssl_LDADD = $(OPENSSL_LDADD)
t_hmac_sha384_openssl_SOURCES = t_hmac_sha384.c
t_hmac_sha384_openssl_CFLAGS = $(OPENSSL_INCLUDES) $(OPENSSL_CFLAGS)
t_hmac_sha384_openssl_LDADD = $(OPENSSL_LDADD)

197
t/t_hmac_sha224.c Normal file
View file

@ -0,0 +1,197 @@
/*-
* Copyright (c) 2012 The University of Oslo
* Copyright (c) 2012 Dag-Erling Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Dag-Erling Smørgrav <des@des.no>
* Sponsor: the University of Oslo
*
* $Cryb$
*/
#include "cryb/impl.h"
#include <err.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "t.h"
#if WITH_OPENSSL
#include <openssl/evp.h>
#include <openssl/hmac.h>
#define HMAC_SHA224_MAC_LEN 32
static void
t_hmac_sha224_complete(const void *key, size_t keylen,
const void *msg, size_t msglen, uint8_t *mac)
{
HMAC_CTX ctx;
HMAC_CTX_init(&ctx);
HMAC_Init_ex(&ctx, key, keylen, EVP_sha224(), NULL);
HMAC_Update(&ctx, msg, msglen);
HMAC_Final(&ctx, mac, NULL);
HMAC_CTX_cleanup(&ctx);
}
#else
#include <cryb/sha224.h>
#include <cryb/hmac.h>
#define t_hmac_sha224_complete(key, keylen, msg, msglen, mac) \
hmac_sha224_complete(key, keylen, msg, msglen, mac)
#endif
/*
* Test vectors from NIST CSRC
* http://csrc.nist.gov/groups/ST/toolkit/examples.html
*/
static struct t_vector {
const char *desc;
const uint8_t *key;
size_t keylen;
const char *msg;
const uint8_t mac[HMAC_SHA224_MAC_LEN];
} t_hmac_sha224_vectors[] = {
{
"zero-length key, zero-length message",
t_zero,
0,
"",
{
0x5c, 0xe1, 0x4f, 0x72, 0x89, 0x46, 0x62, 0x21,
0x3e, 0x27, 0x48, 0xd2, 0xa6, 0xba, 0x23, 0x4b,
0x74, 0x26, 0x39, 0x10, 0xce, 0xdd, 0xe2, 0xf5,
0xa9, 0x27, 0x15, 0x24,
},
},
{
"NIST CSRC example 1 (64-byte key)",
t_seq8,
64,
"Sample message for keylen=blocklen",
{
0xc7, 0x40, 0x5e, 0x3a, 0xe0, 0x58, 0xe8, 0xcd,
0x30, 0xb0, 0x8b, 0x41, 0x40, 0x24, 0x85, 0x81,
0xed, 0x17, 0x4c, 0xb3, 0x4e, 0x12, 0x24, 0xbc,
0xc1, 0xef, 0xc8, 0x1b,
},
},
{
"NIST CSRC example 2 (28-byte key)",
t_seq8,
28,
"Sample message for keylen<blocklen",
{
0xe3, 0xd2, 0x49, 0xa8, 0xcf, 0xb6, 0x7e, 0xf8,
0xb7, 0xa1, 0x69, 0xe9, 0xa0, 0xa5, 0x99, 0x71,
0x4a, 0x2c, 0xec, 0xba, 0x65, 0x99, 0x9a, 0x51,
0xbe, 0xb8, 0xfb, 0xbe,
},
},
{
"NIST CSRC example 3 (100-byte key)",
t_seq8,
100,
/* yes, the text should say keylen>blocklen */
"Sample message for keylen=blocklen",
{
0x91, 0xc5, 0x25, 0x09, 0xe5, 0xaf, 0x85, 0x31,
0x60, 0x1a, 0xe6, 0x23, 0x00, 0x99, 0xd9, 0x0b,
0xef, 0x88, 0xaa, 0xef, 0xb9, 0x61, 0xf4, 0x08,
0x0a, 0xbc, 0x01, 0x4d,
},
},
{
"NIST CSRC example 4 (49-byte key)",
t_seq8,
49,
"Sample message for keylen<blocklen, with truncated tag",
{
0xd5, 0x22, 0xf1, 0xdf, 0x59, 0x6c, 0xa4, 0xb4,
0xb1, 0xc2, 0x3d, 0x27, 0xbd, 0xe0, 0x67, 0xd6,
0x15, 0x3b, 0xa9, 0x72, 0x5f, 0xd5, 0xcd, 0xe0,
0xaf, 0x4a, 0x2a, 0x42,
},
},
};
/*
* Unit test: compute the HMAC signature of the specified string with the
* specified key and compare it to the expected result.
*/
static int
t_hmac_sha224_vector(char **desc CRYB_UNUSED, void *arg)
{
struct t_vector *vector = (struct t_vector *)arg;
uint8_t mac[HMAC_SHA224_MAC_LEN];
t_hmac_sha224_complete(vector->key, vector->keylen,
(const uint8_t *)vector->msg, strlen(vector->msg),
mac);
if (memcmp(mac, vector->mac, HMAC_SHA224_MAC_LEN) != 0) {
t_verbose("expected ");
t_verbose_hex(vector->mac, HMAC_SHA224_MAC_LEN);
t_verbose("\n");
t_verbose("got ");
t_verbose_hex(mac, HMAC_SHA224_MAC_LEN);
t_verbose("\n");
return (0);
}
return (1);
}
/***************************************************************************
* Boilerplate
*/
int
t_prepare(int argc, char *argv[])
{
int i, n;
(void)argc;
(void)argv;
n = sizeof t_hmac_sha224_vectors / sizeof t_hmac_sha224_vectors[0];
for (i = 0; i < n; ++i)
t_add_test(t_hmac_sha224_vector, &t_hmac_sha224_vectors[i],
t_hmac_sha224_vectors[i].desc);
return (0);
}
void
t_cleanup(void)
{
}

277
t/t_sha224.c Normal file
View file

@ -0,0 +1,277 @@
/*-
* Copyright (c) 2012 The University of Oslo
* Copyright (c) 2012-2014 Dag-Erling Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Dag-Erling Smørgrav <des@des.no>
* Sponsor: the University of Oslo
*
* $Cryb$
*/
#include "cryb/impl.h"
#include <err.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "t.h"
#if WITH_OPENSSL
#include <openssl/sha.h>
#define SHA224_DIGEST_LEN SHA224_DIGEST_LENGTH
static void
t_sha224_complete(const void *msg, size_t msglen, uint8_t *digest)
{
SHA256_CTX ctx;
SHA224_Init(&ctx);
SHA224_Update(&ctx, msg, msglen);
SHA224_Final(digest, &ctx);
}
#else
#include <cryb/sha224.h>
#define t_sha224_complete(msg, msglen, digest) \
sha224_complete(msg, msglen, digest)
#endif
/*
* Test vectors from NIST CSRC
* http://csrc.nist.gov/groups/ST/toolkit/examples.html
*/
static struct t_vector {
const char *desc;
const char *msg;
const uint8_t digest[SHA224_DIGEST_LEN];
} t_sha224_vectors[] = {
{
"zero-length message",
"",
{
0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9,
0x47, 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4,
0x15, 0xa2, 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a,
0xc5, 0xb3, 0xe4, 0x2f,
}
},
{
"One-block message",
"abc",
{
0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8, 0x22,
0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2, 0x55, 0xb3,
0x2a, 0xad, 0xbc, 0xe4, 0xbd, 0xa0, 0xb3, 0xf7,
0xe3, 0x6c, 0x9d, 0xa7,
}
},
{
/*
* This message is *just* long enough to necessitate a
* second block, which consists entirely of padding.
*/
"Two-block message",
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
{
0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76, 0xcc,
0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89, 0x01, 0x50,
0xb0, 0xc6, 0x45, 0x5c, 0xb4, 0xf5, 0x8b, 0x19,
0x52, 0x52, 0x25, 0x25,
}
},
{
/*
* 1,000,000 x 'a', filled in by t_prepare()
*/
"Long message",
NULL,
{
0x20, 0x79, 0x46, 0x55, 0x98, 0x0c, 0x91, 0xd8,
0xbb, 0xb4, 0xc1, 0xea, 0x97, 0x61, 0x8a, 0x4b,
0xf0, 0x3f, 0x42, 0x58, 0x19, 0x48, 0xb2, 0xee,
0x4e, 0xe7, 0xad, 0x67,
},
},
{
/*
* One of the MD5 test vectors, included for the "short
* update" test.
*/
"\"1234567890\"x8",
"1234567890123456789012345678901234567890"
"1234567890123456789012345678901234567890",
{
0xb5, 0x0a, 0xec, 0xbe, 0x4e, 0x9b, 0xb0, 0xb5,
0x7b, 0xc5, 0xf3, 0xae, 0x76, 0x0a, 0x8e, 0x01,
0xdb, 0x24, 0xf2, 0x03, 0xfb, 0x3c, 0xdc, 0xd1,
0x31, 0x48, 0x04, 0x6e,
},
},
};
/*
* Unit test: compute the SHA224 sum of the specified string and compare it
* to the expected result.
*/
static int
t_sha224_vector(char **desc CRYB_UNUSED, void *arg)
{
struct t_vector *vector = (struct t_vector *)arg;
uint8_t digest[SHA224_DIGEST_LEN];
char *msg;
if (vector->msg) {
t_sha224_complete(vector->msg, strlen(vector->msg), digest);
} else {
/* special case for FIPS test vector 3 */
if ((msg = malloc(1000000)) == NULL)
err(1, "malloc()");
memset(msg, 'a', 1000000);
t_sha224_complete(msg, 1000000, digest);
free(msg);
}
if (memcmp(digest, vector->digest, SHA224_DIGEST_LEN) != 0) {
t_verbose("expected ");
t_verbose_hex(vector->digest, SHA224_DIGEST_LEN);
t_verbose("\n");
t_verbose("got ");
t_verbose_hex(digest, SHA224_DIGEST_LEN);
t_verbose("\n");
return (0);
}
return (1);
}
#if !defined(WITH_OPENSSL) && !defined(WITH_RSAREF)
/*
* Various corner cases and error conditions
*/
static int
t_sha224_short_updates(char **desc CRYB_UNUSED, void *arg)
{
struct t_vector *vector = (struct t_vector *)arg;
uint8_t digest[SHA224_DIGEST_LEN];
sha224_ctx ctx;
int i, len;
sha224_init(&ctx);
len = strlen(vector->msg);
for (i = 0; i + 5 < len; i += 5)
sha224_update(&ctx, vector->msg + i, 5);
sha224_update(&ctx, vector->msg + i, len - i);
sha224_final(&ctx, digest);
return (memcmp(digest, vector->digest, SHA224_DIGEST_LEN) == 0);
}
#endif
/*
* Performance test: measure the time spent computing the SHA224 sum of a
* message of the specified length.
*/
#define T_PERF_ITERATIONS 1000
static int
t_sha224_perf(char **desc, void *arg)
{
struct timespec ts, te;
unsigned long ns;
uint8_t digest[SHA224_DIGEST_LEN];
char *msg, *comment;
size_t msglen = *(size_t *)arg;
if ((msg = calloc(1, msglen)) == NULL)
err(1, "calloc()");
clock_gettime(CLOCK_MONOTONIC_PRECISE, &ts);
for (int i = 0; i < T_PERF_ITERATIONS; ++i)
t_sha224_complete(msg, msglen, digest);
clock_gettime(CLOCK_MONOTONIC_PRECISE, &te);
free(msg);
ns = te.tv_sec * 1000000000LU + te.tv_nsec;
ns -= ts.tv_sec * 1000000000LU + ts.tv_nsec;
asprintf(&comment, "%zu bytes: %d iterations in %'lu ns",
msglen, T_PERF_ITERATIONS, ns);
if (comment == NULL)
err(1, "asprintf()");
*desc = comment;
return (1);
}
/***************************************************************************
* Boilerplate
*/
int
t_prepare(int argc, char *argv[])
{
int i, n;
(void)argc;
(void)argv;
n = sizeof t_sha224_vectors / sizeof t_sha224_vectors[0];
for (i = 0; i < n; ++i)
t_add_test(t_sha224_vector, &t_sha224_vectors[i],
t_sha224_vectors[i].desc);
#if !defined(WITH_OPENSSL) && !defined(WITH_RSAREF)
/*
* Run test vector 5 (md5 test vector 7, which is 80 characters
* long) 5 characters at a time. This tests a) appending data to
* an underfull block and b) appending more data to an underfull
* block than it has room for (since 64 % 5 != 0). Test vector 4
* and 5 already exercised the code path for computing a block
* directly from source (without copying it in), and all the test
* vectors except vector 1 exercised the general case of copying a
* small amount of data in without crossing the block boundary.
*/
t_add_test(t_sha224_short_updates, &t_sha224_vectors[4],
"multiple short updates");
#endif
if (getenv("CRYB_PERFTEST")) {
static size_t one = 1, thousand = 1000, million = 1000000;
t_add_test(t_sha224_perf, &one,
"performance test (1 byte)");
t_add_test(t_sha224_perf, &thousand,
"performance test (1,000 bytes)");
t_add_test(t_sha224_perf, &million,
"performance test (1,000,000 bytes)");
}
return (0);
}
void
t_cleanup(void)
{
}

8
t/t_sha256.c
View file

@ -81,7 +81,7 @@ static struct t_vector {
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
}
},
{
@ -133,7 +133,7 @@ static struct t_vector {
0xf3, 0x71, 0xbc, 0x4a, 0x31, 0x1f, 0x2b, 0x00,
0x9e, 0xef, 0x95, 0x2d, 0xd8, 0x3c, 0xa8, 0x0e,
0x2b, 0x60, 0x02, 0x6c, 0x8e, 0x93, 0x55, 0x92,
0xd0, 0xf9, 0xc3, 0x08, 0x45, 0x3c, 0x81, 0x3e,
0xd0, 0xf9, 0xc3, 0x08, 0x45, 0x3c, 0x81, 0x3e,
},
},
};
@ -184,12 +184,12 @@ t_sha256_short_updates(char **desc CRYB_UNUSED, void *arg)
sha256_ctx ctx;
int i, len;
sha256_init(&ctx);
sha256_init(&ctx);
len = strlen(vector->msg);
for (i = 0; i + 5 < len; i += 5)
sha256_update(&ctx, vector->msg + i, 5);
sha256_update(&ctx, vector->msg + i, len - i);
sha256_final(&ctx, digest);
sha256_final(&ctx, digest);
return (memcmp(digest, vector->digest, SHA256_DIGEST_LEN) == 0);
}
#endif