+/* vi: set sw=4 ts=4: */
/*
- * Based on shasum from http://www.netsw.org/crypto/hash/
- * Majorly hacked up to use Dr Brian Gladman's sha1 code
+ * Based on shasum from http://www.netsw.org/crypto/hash/
+ * Majorly hacked up to use Dr Brian Gladman's sha1 code
*
- * Copyright (C) 2002 Dr Brian Gladman <brg@gladman.me.uk>, Worcester, UK.
- * Copyright (C) 2003 Glenn L. McGrath
- * Copyright (C) 2003 Erik Andersen
- *
- * LICENSE TERMS
+ * Copyright (C) 2002 Dr Brian Gladman <brg@gladman.me.uk>, Worcester, UK.
+ * Copyright (C) 2003 Glenn L. McGrath
+ * Copyright (C) 2003 Erik Andersen
*
- * The free distribution and use of this software in both source and binary
- * form is allowed (with or without changes) provided that:
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*
- * 1. distributions of this source code include the above copyright
- * notice, this list of conditions and the following disclaimer;
+ * ---------------------------------------------------------------------------
+ * Issue Date: 10/11/2002
*
- * 2. distributions in binary form include the above copyright
- * notice, this list of conditions and the following disclaimer
- * in the documentation and/or other associated materials;
+ * This is a byte oriented version of SHA1 that operates on arrays of bytes
+ * stored in memory. It runs at 22 cycles per byte on a Pentium P4 processor
*
- * 3. the copyright holder's name is not used to endorse products
- * built using this software without specific written permission.
+ * ---------------------------------------------------------------------------
*
- * ALTERNATIVELY, provided that this notice is retained in full, this product
- * may be distributed under the terms of the GNU General Public License (GPL),
- * in which case the provisions of the GPL apply INSTEAD OF those given above.
+ * SHA256 and SHA512 parts are:
+ * Released into the Public Domain by Ulrich Drepper <drepper@redhat.com>.
+ * Shrank by Denys Vlasenko.
*
- * DISCLAIMER
+ * ---------------------------------------------------------------------------
*
- * This software is provided 'as is' with no explicit or implied warranties
- * in respect of its properties, including, but not limited to, correctness
- * and/or fitness for purpose.
- * ---------------------------------------------------------------------------
- * Issue Date: 10/11/2002
- *
- * This is a byte oriented version of SHA1 that operates on arrays of bytes
- * stored in memory. It runs at 22 cycles per byte on a Pentium P4 processor
+ * The best way to test random blocksizes is to go to coreutils/md5_sha1_sum.c
+ * and replace "4096" with something like "2000 + time(NULL) % 2097",
+ * then rebuild and compare "shaNNNsum bigfile" results.
*/
-#include <fcntl.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "busybox.h"
-
-# define SHA1_BLOCK_SIZE 64
-# define SHA1_DIGEST_SIZE 20
-# define SHA1_HASH_SIZE SHA1_DIGEST_SIZE
-# define SHA2_GOOD 0
-# define SHA2_BAD 1
+#include "libbb.h"
-# define rotl32(x,n) (((x) << n) | ((x) >> (32 - n)))
+#define rotl32(x,n) (((x) << (n)) | ((x) >> (32 - (n))))
+#define rotr32(x,n) (((x) >> (n)) | ((x) << (32 - (n))))
+/* for sha512: */
+#define rotr64(x,n) (((x) >> (n)) | ((x) << (64 - (n))))
+#if BB_LITTLE_ENDIAN
+static inline uint64_t hton64(uint64_t v)
+{
+ return (((uint64_t)htonl(v)) << 32) | htonl(v >> 32);
+}
+#else
+#define hton64(v) (v)
+#endif
+#define ntoh64(v) hton64(v)
+
+/* To check alignment gcc has an appropriate operator. Other
+ compilers don't. */
+#if defined(__GNUC__) && __GNUC__ >= 2
+# define UNALIGNED_P(p,type) (((uintptr_t) p) % __alignof__(type) != 0)
+#else
+# define UNALIGNED_P(p,type) (((uintptr_t) p) % sizeof(type) != 0)
+#endif
-# define SHA1_MASK (SHA1_BLOCK_SIZE - 1)
-/* reverse byte order in 32-bit words */
-#define ch(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
-#define parity(x,y,z) ((x) ^ (y) ^ (z))
-#define maj(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
+/* Some arch headers have conflicting defines */
+#undef ch
+#undef parity
+#undef maj
+#undef rnd
-/* A normal version as set out in the FIPS. This version uses */
-/* partial loop unrolling and is optimised for the Pentium 4 */
-# define rnd(f,k) \
- t = a; a = rotl32(a,5) + f(b,c,d) + e + k + w[i]; \
- e = d; d = c; c = rotl32(b, 30); b = t
-
-
-static void sha1_compile(sha1_ctx_t *ctx)
+static void FAST_FUNC sha1_process_block64(sha1_ctx_t *ctx)
{
- uint32_t w[80], i, a, b, c, d, e, t;
+ unsigned t;
+ uint32_t W[80], a, b, c, d, e;
+ const uint32_t *words = (uint32_t*) ctx->wbuffer;
- /* note that words are compiled from the buffer into 32-bit */
- /* words in big-endian order so an order reversal is needed */
- /* here on little endian machines */
- for (i = 0; i < SHA1_BLOCK_SIZE / 4; ++i)
- w[i] = htonl(ctx->wbuf[i]);
+ for (t = 0; t < 16; ++t) {
+ W[t] = ntohl(*words);
+ words++;
+ }
- for (i = SHA1_BLOCK_SIZE / 4; i < 80; ++i)
- w[i] = rotl32(w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16], 1);
+ for (/*t = 16*/; t < 80; ++t) {
+ uint32_t T = W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16];
+ W[t] = rotl32(T, 1);
+ }
a = ctx->hash[0];
b = ctx->hash[1];
d = ctx->hash[3];
e = ctx->hash[4];
- for (i = 0; i < 20; ++i) {
+/* Reverse byte order in 32-bit words */
+#define ch(x,y,z) ((z) ^ ((x) & ((y) ^ (z))))
+#define parity(x,y,z) ((x) ^ (y) ^ (z))
+#define maj(x,y,z) (((x) & (y)) | ((z) & ((x) | (y))))
+/* A normal version as set out in the FIPS. This version uses */
+/* partial loop unrolling and is optimised for the Pentium 4 */
+#define rnd(f,k) \
+ do { \
+ uint32_t T = a; \
+ a = rotl32(a, 5) + f(b, c, d) + e + k + W[t]; \
+ e = d; \
+ d = c; \
+ c = rotl32(b, 30); \
+ b = T; \
+ } while (0)
+
+ for (t = 0; t < 20; ++t)
rnd(ch, 0x5a827999);
- }
- for (i = 20; i < 40; ++i) {
+ for (/*t = 20*/; t < 40; ++t)
rnd(parity, 0x6ed9eba1);
- }
- for (i = 40; i < 60; ++i) {
+ for (/*t = 40*/; t < 60; ++t)
rnd(maj, 0x8f1bbcdc);
- }
- for (i = 60; i < 80; ++i) {
+ for (/*t = 60*/; t < 80; ++t)
rnd(parity, 0xca62c1d6);
+#undef ch
+#undef parity
+#undef maj
+#undef rnd
+
+ ctx->hash[0] += a;
+ ctx->hash[1] += b;
+ ctx->hash[2] += c;
+ ctx->hash[3] += d;
+ ctx->hash[4] += e;
+}
+
+/* Constants for SHA512 from FIPS 180-2:4.2.3.
+ * SHA256 constants from FIPS 180-2:4.2.2
+ * are the most significant half of first 64 elements
+ * of the same array.
+ */
+static const uint64_t sha_K[80] = {
+ 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
+ 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
+ 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
+ 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
+ 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
+ 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
+ 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
+ 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
+ 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
+ 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
+ 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
+ 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
+ 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
+ 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
+ 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
+ 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
+ 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
+ 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
+ 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
+ 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
+ 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
+ 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
+ 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
+ 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
+ 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
+ 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
+ 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
+ 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
+ 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
+ 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
+ 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
+ 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
+ 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, /* [64]+ are used for sha512 only */
+ 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
+ 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
+ 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
+ 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
+ 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
+ 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
+ 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
+};
+
+#undef Ch
+#undef Maj
+#undef S0
+#undef S1
+#undef R0
+#undef R1
+
+static void FAST_FUNC sha256_process_block64(sha256_ctx_t *ctx)
+{
+ unsigned t;
+ uint32_t W[64], a, b, c, d, e, f, g, h;
+ const uint32_t *words = (uint32_t*) ctx->wbuffer;
+
+ /* Operators defined in FIPS 180-2:4.1.2. */
+#define Ch(x, y, z) ((x & y) ^ (~x & z))
+#define Maj(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
+#define S0(x) (rotr32(x, 2) ^ rotr32(x, 13) ^ rotr32(x, 22))
+#define S1(x) (rotr32(x, 6) ^ rotr32(x, 11) ^ rotr32(x, 25))
+#define R0(x) (rotr32(x, 7) ^ rotr32(x, 18) ^ (x >> 3))
+#define R1(x) (rotr32(x, 17) ^ rotr32(x, 19) ^ (x >> 10))
+
+ /* Compute the message schedule according to FIPS 180-2:6.2.2 step 2. */
+ for (t = 0; t < 16; ++t) {
+ W[t] = ntohl(*words);
+ words++;
}
+ for (/*t = 16*/; t < 64; ++t)
+ W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
+
+ a = ctx->hash[0];
+ b = ctx->hash[1];
+ c = ctx->hash[2];
+ d = ctx->hash[3];
+ e = ctx->hash[4];
+ f = ctx->hash[5];
+ g = ctx->hash[6];
+ h = ctx->hash[7];
+
+ /* The actual computation according to FIPS 180-2:6.2.2 step 3. */
+ for (t = 0; t < 64; ++t) {
+ /* Need to fetch upper half of sha_K[t]
+ * (I hope compiler is clever enough to just fetch
+ * upper half)
+ */
+ uint32_t K_t = sha_K[t] >> 32;
+ uint32_t T1 = h + S1(e) + Ch(e, f, g) + K_t + W[t];
+ uint32_t T2 = S0(a) + Maj(a, b, c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + T1;
+ d = c;
+ c = b;
+ b = a;
+ a = T1 + T2;
+ }
+#undef Ch
+#undef Maj
+#undef S0
+#undef S1
+#undef R0
+#undef R1
+ /* Add the starting values of the context according to FIPS 180-2:6.2.2
+ step 4. */
+ ctx->hash[0] += a;
+ ctx->hash[1] += b;
+ ctx->hash[2] += c;
+ ctx->hash[3] += d;
+ ctx->hash[4] += e;
+ ctx->hash[5] += f;
+ ctx->hash[6] += g;
+ ctx->hash[7] += h;
+}
+
+static void FAST_FUNC sha512_process_block128(sha512_ctx_t *ctx)
+{
+ unsigned t;
+ uint64_t W[80];
+ /* On i386, having assignments here (not later as sha256 does)
+ * produces 99 bytes smaller code with gcc 4.3.1
+ */
+ uint64_t a = ctx->hash[0];
+ uint64_t b = ctx->hash[1];
+ uint64_t c = ctx->hash[2];
+ uint64_t d = ctx->hash[3];
+ uint64_t e = ctx->hash[4];
+ uint64_t f = ctx->hash[5];
+ uint64_t g = ctx->hash[6];
+ uint64_t h = ctx->hash[7];
+ const uint64_t *words = (uint64_t*) ctx->wbuffer;
+
+ /* Operators defined in FIPS 180-2:4.1.2. */
+#define Ch(x, y, z) ((x & y) ^ (~x & z))
+#define Maj(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
+#define S0(x) (rotr64(x, 28) ^ rotr64(x, 34) ^ rotr64(x, 39))
+#define S1(x) (rotr64(x, 14) ^ rotr64(x, 18) ^ rotr64(x, 41))
+#define R0(x) (rotr64(x, 1) ^ rotr64(x, 8) ^ (x >> 7))
+#define R1(x) (rotr64(x, 19) ^ rotr64(x, 61) ^ (x >> 6))
+
+ /* Compute the message schedule according to FIPS 180-2:6.3.2 step 2. */
+ for (t = 0; t < 16; ++t) {
+ W[t] = ntoh64(*words);
+ words++;
+ }
+ for (/*t = 16*/; t < 80; ++t)
+ W[t] = R1(W[t - 2]) + W[t - 7] + R0(W[t - 15]) + W[t - 16];
+
+ /* The actual computation according to FIPS 180-2:6.3.2 step 3. */
+ for (t = 0; t < 80; ++t) {
+ uint64_t T1 = h + S1(e) + Ch(e, f, g) + sha_K[t] + W[t];
+ uint64_t T2 = S0(a) + Maj(a, b, c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + T1;
+ d = c;
+ c = b;
+ b = a;
+ a = T1 + T2;
+ }
+#undef Ch
+#undef Maj
+#undef S0
+#undef S1
+#undef R0
+#undef R1
+ /* Add the starting values of the context according to FIPS 180-2:6.3.2
+ step 4. */
ctx->hash[0] += a;
ctx->hash[1] += b;
ctx->hash[2] += c;
ctx->hash[3] += d;
ctx->hash[4] += e;
+ ctx->hash[5] += f;
+ ctx->hash[6] += g;
+ ctx->hash[7] += h;
}
-void sha1_begin(sha1_ctx_t *ctx)
+
+void FAST_FUNC sha1_begin(sha1_ctx_t *ctx)
{
- ctx->count[0] = ctx->count[1] = 0;
ctx->hash[0] = 0x67452301;
ctx->hash[1] = 0xefcdab89;
ctx->hash[2] = 0x98badcfe;
ctx->hash[3] = 0x10325476;
ctx->hash[4] = 0xc3d2e1f0;
+ ctx->total64 = 0;
+ ctx->process_block = sha1_process_block64;
+}
+
+static const uint32_t init256[] = {
+ 0x6a09e667,
+ 0xbb67ae85,
+ 0x3c6ef372,
+ 0xa54ff53a,
+ 0x510e527f,
+ 0x9b05688c,
+ 0x1f83d9ab,
+ 0x5be0cd19
+};
+static const uint32_t init512_lo[] = {
+ 0xf3bcc908,
+ 0x84caa73b,
+ 0xfe94f82b,
+ 0x5f1d36f1,
+ 0xade682d1,
+ 0x2b3e6c1f,
+ 0xfb41bd6b,
+ 0x137e2179
+};
+
+/* Initialize structure containing state of computation.
+ (FIPS 180-2:5.3.2) */
+void FAST_FUNC sha256_begin(sha256_ctx_t *ctx)
+{
+ memcpy(ctx->hash, init256, sizeof(init256));
+ ctx->total64 = 0;
+ ctx->process_block = sha256_process_block64;
}
-/* SHA1 hash data in an array of bytes into hash buffer and call the */
-/* hash_compile function as required. */
-void sha1_hash(const void *data, size_t length, sha1_ctx_t *ctx)
+/* Initialize structure containing state of computation.
+ (FIPS 180-2:5.3.3) */
+void FAST_FUNC sha512_begin(sha512_ctx_t *ctx)
{
- uint32_t pos = (uint32_t) (ctx->count[0] & SHA1_MASK);
- uint32_t freeb = SHA1_BLOCK_SIZE - pos;
- const unsigned char *sp = data;
-
- if ((ctx->count[0] += length) < length)
- ++(ctx->count[1]);
-
- while (length >= freeb) { /* tranfer whole blocks while possible */
- memcpy(((unsigned char *) ctx->wbuf) + pos, sp, freeb);
- sp += freeb;
- length -= freeb;
- freeb = SHA1_BLOCK_SIZE;
- pos = 0;
- sha1_compile(ctx);
+ int i;
+ for (i = 0; i < 8; i++)
+ ctx->hash[i] = ((uint64_t)(init256[i]) << 32) + init512_lo[i];
+ ctx->total64[0] = ctx->total64[1] = 0;
+}
+
+
+/* Used also for sha256 */
+void FAST_FUNC sha1_hash(const void *buffer, size_t len, sha1_ctx_t *ctx)
+{
+ unsigned in_buf = ctx->total64 & 63;
+ unsigned add = 64 - in_buf;
+
+ ctx->total64 += len;
+
+ while (len >= add) { /* transfer whole blocks while possible */
+ memcpy(ctx->wbuffer + in_buf, buffer, add);
+ buffer = (const char *)buffer + add;
+ len -= add;
+ add = 64;
+ in_buf = 0;
+ ctx->process_block(ctx);
}
- memcpy(((unsigned char *) ctx->wbuf) + pos, sp, length);
+ memcpy(ctx->wbuffer + in_buf, buffer, len);
}
-void *sha1_end(void *resbuf, sha1_ctx_t *ctx)
+void FAST_FUNC sha512_hash(const void *buffer, size_t len, sha512_ctx_t *ctx)
{
- /* SHA1 Final padding and digest calculation */
-#if BB_BIG_ENDIAN
- static uint32_t mask[4] = { 0x00000000, 0xff000000, 0xffff0000, 0xffffff00 };
- static uint32_t bits[4] = { 0x80000000, 0x00800000, 0x00008000, 0x00000080 };
-#else
- static uint32_t mask[4] = { 0x00000000, 0x000000ff, 0x0000ffff, 0x00ffffff };
- static uint32_t bits[4] = { 0x00000080, 0x00008000, 0x00800000, 0x80000000 };
-#endif /* __BYTE_ORDER */
-
- uint8_t *hval = resbuf;
- uint32_t i, cnt = (uint32_t) (ctx->count[0] & SHA1_MASK);
-
- /* mask out the rest of any partial 32-bit word and then set */
- /* the next byte to 0x80. On big-endian machines any bytes in */
- /* the buffer will be at the top end of 32 bit words, on little */
- /* endian machines they will be at the bottom. Hence the AND */
- /* and OR masks above are reversed for little endian systems */
- ctx->wbuf[cnt >> 2] =
- (ctx->wbuf[cnt >> 2] & mask[cnt & 3]) | bits[cnt & 3];
-
- /* we need 9 or more empty positions, one for the padding byte */
- /* (above) and eight for the length count. If there is not */
- /* enough space pad and empty the buffer */
- if (cnt > SHA1_BLOCK_SIZE - 9) {
- if (cnt < 60)
- ctx->wbuf[15] = 0;
- sha1_compile(ctx);
- cnt = 0;
- } else /* compute a word index for the empty buffer positions */
- cnt = (cnt >> 2) + 1;
-
- while (cnt < 14) /* and zero pad all but last two positions */
- ctx->wbuf[cnt++] = 0;
-
- /* assemble the eight byte counter in the buffer in big-endian */
- /* format */
-
- ctx->wbuf[14] = htonl((ctx->count[1] << 3) | (ctx->count[0] >> 29));
- ctx->wbuf[15] = htonl(ctx->count[0] << 3);
-
- sha1_compile(ctx);
-
- /* extract the hash value as bytes in case the hash buffer is */
- /* misaligned for 32-bit words */
-
- for (i = 0; i < SHA1_DIGEST_SIZE; ++i)
- hval[i] = (unsigned char) (ctx->hash[i >> 2] >> 8 * (~i & 3));
-
- return resbuf;
+ unsigned in_buf = ctx->total64[0] & 127;
+ unsigned add = 128 - in_buf;
+
+ /* First increment the byte count. FIPS 180-2 specifies the possible
+ length of the file up to 2^128 _bits_.
+ We compute the number of _bytes_ and convert to bits later. */
+ ctx->total64[0] += len;
+ if (ctx->total64[0] < len)
+ ctx->total64[1]++;
+
+ while (len >= add) { /* transfer whole blocks while possible */
+ memcpy(ctx->wbuffer + in_buf, buffer, add);
+ buffer = (const char *)buffer + add;
+ len -= add;
+ add = 128;
+ in_buf = 0;
+ sha512_process_block128(ctx);
+ }
+
+ memcpy(ctx->wbuffer + in_buf, buffer, len);
+}
+
+
+/* Used also for sha256 */
+void FAST_FUNC sha1_end(void *resbuf, sha1_ctx_t *ctx)
+{
+ unsigned i, pad, in_buf;
+
+ in_buf = ctx->total64 & 63;
+ /* Pad the buffer to the next 64-byte boundary with 0x80,0,0,0... */
+ ctx->wbuffer[in_buf++] = 0x80;
+
+ /* This loop iterates either once or twice, no more, no less */
+ while (1) {
+ pad = 64 - in_buf;
+ memset(ctx->wbuffer + in_buf, 0, pad);
+ in_buf = 0;
+ /* Do we have enough space for the length count? */
+ if (pad >= 8) {
+ /* Store the 64-bit counter of bits in the buffer in BE format */
+ uint64_t t = ctx->total64 << 3;
+ t = hton64(t);
+ /* wbuffer is suitably aligned for this */
+ *(uint64_t *) (&ctx->wbuffer[64 - 8]) = t;
+ }
+ ctx->process_block(ctx);
+ if (pad >= 8)
+ break;
+ }
+
+ in_buf = (ctx->process_block == sha1_process_block64) ? 5 : 8;
+ /* This way we do not impose alignment constraints on resbuf: */
+#if BB_LITTLE_ENDIAN
+ for (i = 0; i < in_buf; ++i)
+ ctx->hash[i] = htonl(ctx->hash[i]);
+#endif
+ memcpy(resbuf, ctx->hash, sizeof(ctx->hash[0]) * in_buf);
}
+void FAST_FUNC sha512_end(void *resbuf, sha512_ctx_t *ctx)
+{
+ unsigned i, pad, in_buf;
+
+ in_buf = ctx->total64[0] & 127;
+ /* Pad the buffer to the next 128-byte boundary with 0x80,0,0,0...
+ * (FIPS 180-2:5.1.2)
+ */
+ ctx->wbuffer[in_buf++] = 0x80;
+
+ while (1) {
+ pad = 128 - in_buf;
+ memset(ctx->wbuffer + in_buf, 0, pad);
+ in_buf = 0;
+ if (pad >= 16) {
+ /* Store the 128-bit counter of bits in the buffer in BE format */
+ uint64_t t;
+ t = ctx->total64[0] << 3;
+ t = hton64(t);
+ *(uint64_t *) (&ctx->wbuffer[128 - 8]) = t;
+ t = (ctx->total64[1] << 3) | (ctx->total64[0] >> 61);
+ t = hton64(t);
+ *(uint64_t *) (&ctx->wbuffer[128 - 16]) = t;
+ }
+ sha512_process_block128(ctx);
+ if (pad >= 16)
+ break;
+ }
+#if BB_LITTLE_ENDIAN
+ for (i = 0; i < ARRAY_SIZE(ctx->hash); ++i)
+ ctx->hash[i] = hton64(ctx->hash[i]);
+#endif
+ memcpy(resbuf, ctx->hash, sizeof(ctx->hash));
+}
projects / oweals / busybox.git / blobdiff