* modules/crypto/sha256: New file.
* modules/crypto/sha512: Likewise.
* lib/sha256.c: Likewise.
* lib/sha256.h: Likewise.
* lib/sha512.c: Likewise.
* lib/sha512.h: Likewise.
* lib/u64.h: Likewise.
* m4/sha256.m4: Likewise.
* m4/sha512.m4: Likewise.
* MODULES.html.sh (Cryptographic computations (low-level)): List them.
+2008-05-11 Jim Meyering <meyering@redhat.com>
+
+ New modules: crypto/sha256, crypto/sha512 (from coreutils)
+ * modules/crypto/sha256: New file.
+ * modules/crypto/sha512: Likewise.
+ * lib/sha256.c: Likewise.
+ * lib/sha256.h: Likewise.
+ * lib/sha512.c: Likewise.
+ * lib/sha512.h: Likewise.
+ * lib/u64.h: Likewise.
+ * m4/sha256.m4: Likewise.
+ * m4/sha512.m4: Likewise.
+ * MODULES.html.sh (Cryptographic computations (low-level)): List them.
+
2008-05-10 Bruno Haible <bruno@clisp.org>
* MODULES.html.sh (Environment variables <stdlib.h>): Add unsetenv.
func_module crypto/md5
func_module crypto/rijndael
func_module crypto/sha1
+ func_module crypto/sha256
+ func_module crypto/sha512
func_end_table
element="Cryptographic computations (high-level)"
--- /dev/null
+/* sha256.c - Functions to compute SHA256 and SHA224 message digest of files or
+ memory blocks according to the NIST specification FIPS-180-2.
+
+ Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+
+ 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by David Madore, considerably copypasting from
+ Scott G. Miller's sha1.c
+*/
+
+#include <config.h>
+
+#include "sha256.h"
+
+#include <stddef.h>
+#include <string.h>
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+#ifdef WORDS_BIGENDIAN
+# define SWAP(n) (n)
+#else
+# define SWAP(n) \
+ (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
+#endif
+
+#define BLOCKSIZE 4096
+#if BLOCKSIZE % 64 != 0
+# error "invalid BLOCKSIZE"
+#endif
+
+/* This array contains the bytes used to pad the buffer to the next
+ 64-byte boundary. */
+static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
+
+
+/*
+ Takes a pointer to a 256 bit block of data (eight 32 bit ints) and
+ intializes it to the start constants of the SHA256 algorithm. This
+ must be called before using hash in the call to sha256_hash
+*/
+void
+sha256_init_ctx (struct sha256_ctx *ctx)
+{
+ ctx->state[0] = 0x6a09e667UL;
+ ctx->state[1] = 0xbb67ae85UL;
+ ctx->state[2] = 0x3c6ef372UL;
+ ctx->state[3] = 0xa54ff53aUL;
+ ctx->state[4] = 0x510e527fUL;
+ ctx->state[5] = 0x9b05688cUL;
+ ctx->state[6] = 0x1f83d9abUL;
+ ctx->state[7] = 0x5be0cd19UL;
+
+ ctx->total[0] = ctx->total[1] = 0;
+ ctx->buflen = 0;
+}
+
+void
+sha224_init_ctx (struct sha256_ctx *ctx)
+{
+ ctx->state[0] = 0xc1059ed8UL;
+ ctx->state[1] = 0x367cd507UL;
+ ctx->state[2] = 0x3070dd17UL;
+ ctx->state[3] = 0xf70e5939UL;
+ ctx->state[4] = 0xffc00b31UL;
+ ctx->state[5] = 0x68581511UL;
+ ctx->state[6] = 0x64f98fa7UL;
+ ctx->state[7] = 0xbefa4fa4UL;
+
+ ctx->total[0] = ctx->total[1] = 0;
+ ctx->buflen = 0;
+}
+
+/* Copy the value from v into the memory location pointed to by *cp,
+ If your architecture allows unaligned access this is equivalent to
+ * (uint32_t *) cp = v */
+static inline void
+set_uint32 (char *cp, uint32_t v)
+{
+ memcpy (cp, &v, sizeof v);
+}
+
+/* Put result from CTX in first 32 bytes following RESBUF. The result
+ must be in little endian byte order. */
+void *
+sha256_read_ctx (const struct sha256_ctx *ctx, void *resbuf)
+{
+ int i;
+ char *r = resbuf;
+
+ for (i = 0; i < 8; i++)
+ set_uint32 (r + i * sizeof ctx->state[0], SWAP (ctx->state[i]));
+
+ return resbuf;
+}
+
+void *
+sha224_read_ctx (const struct sha256_ctx *ctx, void *resbuf)
+{
+ int i;
+ char *r = resbuf;
+
+ for (i = 0; i < 7; i++)
+ set_uint32 (r + i * sizeof ctx->state[0], SWAP (ctx->state[i]));
+
+ return resbuf;
+}
+
+/* Process the remaining bytes in the internal buffer and the usual
+ prolog according to the standard and write the result to RESBUF. */
+static void
+sha256_conclude_ctx (struct sha256_ctx *ctx)
+{
+ /* Take yet unprocessed bytes into account. */
+ uint32_t bytes = ctx->buflen;
+ size_t size = (bytes < 56) ? 64 / 4 : 64 * 2 / 4;
+
+ /* Now count remaining bytes. */
+ ctx->total[0] += bytes;
+ if (ctx->total[0] < bytes)
+ ++ctx->total[1];
+
+ /* Put the 64-bit file length in *bits* at the end of the buffer. */
+ ctx->buffer[size - 2] = SWAP ((ctx->total[1] << 3) | (ctx->total[0] >> 29));
+ ctx->buffer[size - 1] = SWAP (ctx->total[0] << 3);
+
+ memcpy (&((char *) ctx->buffer)[bytes], fillbuf, (size - 2) * 4 - bytes);
+
+ /* Process last bytes. */
+ sha256_process_block (ctx->buffer, size * 4, ctx);
+}
+
+void *
+sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf)
+{
+ sha256_conclude_ctx (ctx);
+ return sha256_read_ctx (ctx, resbuf);
+}
+
+void *
+sha224_finish_ctx (struct sha256_ctx *ctx, void *resbuf)
+{
+ sha256_conclude_ctx (ctx);
+ return sha224_read_ctx (ctx, resbuf);
+}
+
+/* Compute SHA256 message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 32 bytes
+ beginning at RESBLOCK. */
+int
+sha256_stream (FILE *stream, void *resblock)
+{
+ struct sha256_ctx ctx;
+ char buffer[BLOCKSIZE + 72];
+ size_t sum;
+
+ /* Initialize the computation context. */
+ sha256_init_ctx (&ctx);
+
+ /* Iterate over full file contents. */
+ while (1)
+ {
+ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
+ computation function processes the whole buffer so that with the
+ next round of the loop another block can be read. */
+ size_t n;
+ sum = 0;
+
+ /* Read block. Take care for partial reads. */
+ while (1)
+ {
+ n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
+
+ sum += n;
+
+ if (sum == BLOCKSIZE)
+ break;
+
+ if (n == 0)
+ {
+ /* Check for the error flag IFF N == 0, so that we don't
+ exit the loop after a partial read due to e.g., EAGAIN
+ or EWOULDBLOCK. */
+ if (ferror (stream))
+ return 1;
+ goto process_partial_block;
+ }
+
+ /* We've read at least one byte, so ignore errors. But always
+ check for EOF, since feof may be true even though N > 0.
+ Otherwise, we could end up calling fread after EOF. */
+ if (feof (stream))
+ goto process_partial_block;
+ }
+
+ /* Process buffer with BLOCKSIZE bytes. Note that
+ BLOCKSIZE % 64 == 0
+ */
+ sha256_process_block (buffer, BLOCKSIZE, &ctx);
+ }
+
+ process_partial_block:;
+
+ /* Process any remaining bytes. */
+ if (sum > 0)
+ sha256_process_bytes (buffer, sum, &ctx);
+
+ /* Construct result in desired memory. */
+ sha256_finish_ctx (&ctx, resblock);
+ return 0;
+}
+
+/* FIXME: Avoid code duplication */
+int
+sha224_stream (FILE *stream, void *resblock)
+{
+ struct sha256_ctx ctx;
+ char buffer[BLOCKSIZE + 72];
+ size_t sum;
+
+ /* Initialize the computation context. */
+ sha224_init_ctx (&ctx);
+
+ /* Iterate over full file contents. */
+ while (1)
+ {
+ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
+ computation function processes the whole buffer so that with the
+ next round of the loop another block can be read. */
+ size_t n;
+ sum = 0;
+
+ /* Read block. Take care for partial reads. */
+ while (1)
+ {
+ n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
+
+ sum += n;
+
+ if (sum == BLOCKSIZE)
+ break;
+
+ if (n == 0)
+ {
+ /* Check for the error flag IFF N == 0, so that we don't
+ exit the loop after a partial read due to e.g., EAGAIN
+ or EWOULDBLOCK. */
+ if (ferror (stream))
+ return 1;
+ goto process_partial_block;
+ }
+
+ /* We've read at least one byte, so ignore errors. But always
+ check for EOF, since feof may be true even though N > 0.
+ Otherwise, we could end up calling fread after EOF. */
+ if (feof (stream))
+ goto process_partial_block;
+ }
+
+ /* Process buffer with BLOCKSIZE bytes. Note that
+ BLOCKSIZE % 64 == 0
+ */
+ sha256_process_block (buffer, BLOCKSIZE, &ctx);
+ }
+
+ process_partial_block:;
+
+ /* Process any remaining bytes. */
+ if (sum > 0)
+ sha256_process_bytes (buffer, sum, &ctx);
+
+ /* Construct result in desired memory. */
+ sha224_finish_ctx (&ctx, resblock);
+ return 0;
+}
+
+/* Compute SHA512 message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+void *
+sha256_buffer (const char *buffer, size_t len, void *resblock)
+{
+ struct sha256_ctx ctx;
+
+ /* Initialize the computation context. */
+ sha256_init_ctx (&ctx);
+
+ /* Process whole buffer but last len % 64 bytes. */
+ sha256_process_bytes (buffer, len, &ctx);
+
+ /* Put result in desired memory area. */
+ return sha256_finish_ctx (&ctx, resblock);
+}
+
+void *
+sha224_buffer (const char *buffer, size_t len, void *resblock)
+{
+ struct sha256_ctx ctx;
+
+ /* Initialize the computation context. */
+ sha224_init_ctx (&ctx);
+
+ /* Process whole buffer but last len % 64 bytes. */
+ sha256_process_bytes (buffer, len, &ctx);
+
+ /* Put result in desired memory area. */
+ return sha224_finish_ctx (&ctx, resblock);
+}
+
+void
+sha256_process_bytes (const void *buffer, size_t len, struct sha256_ctx *ctx)
+{
+ /* When we already have some bits in our internal buffer concatenate
+ both inputs first. */
+ if (ctx->buflen != 0)
+ {
+ size_t left_over = ctx->buflen;
+ size_t add = 128 - left_over > len ? len : 128 - left_over;
+
+ memcpy (&((char *) ctx->buffer)[left_over], buffer, add);
+ ctx->buflen += add;
+
+ if (ctx->buflen > 64)
+ {
+ sha256_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
+
+ ctx->buflen &= 63;
+ /* The regions in the following copy operation cannot overlap. */
+ memcpy (ctx->buffer,
+ &((char *) ctx->buffer)[(left_over + add) & ~63],
+ ctx->buflen);
+ }
+
+ buffer = (const char *) buffer + add;
+ len -= add;
+ }
+
+ /* Process available complete blocks. */
+ if (len >= 64)
+ {
+#if !_STRING_ARCH_unaligned
+# define alignof(type) offsetof (struct { char c; type x; }, x)
+# define UNALIGNED_P(p) (((size_t) p) % alignof (uint32_t) != 0)
+ if (UNALIGNED_P (buffer))
+ while (len > 64)
+ {
+ sha256_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
+ buffer = (const char *) buffer + 64;
+ len -= 64;
+ }
+ else
+#endif
+ {
+ sha256_process_block (buffer, len & ~63, ctx);
+ buffer = (const char *) buffer + (len & ~63);
+ len &= 63;
+ }
+ }
+
+ /* Move remaining bytes in internal buffer. */
+ if (len > 0)
+ {
+ size_t left_over = ctx->buflen;
+
+ memcpy (&((char *) ctx->buffer)[left_over], buffer, len);
+ left_over += len;
+ if (left_over >= 64)
+ {
+ sha256_process_block (ctx->buffer, 64, ctx);
+ left_over -= 64;
+ memcpy (ctx->buffer, &ctx->buffer[16], left_over);
+ }
+ ctx->buflen = left_over;
+ }
+}
+
+/* --- Code below is the primary difference between sha1.c and sha256.c --- */
+
+/* SHA256 round constants */
+#define K(I) sha256_round_constants[I]
+static const uint32_t sha256_round_constants[64] = {
+ 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
+ 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
+ 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
+ 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
+ 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
+ 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
+ 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
+ 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
+ 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
+ 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
+ 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
+ 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
+ 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
+ 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
+ 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
+ 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL,
+};
+
+/* Round functions. */
+#define F2(A,B,C) ( ( A & B ) | ( C & ( A | B ) ) )
+#define F1(E,F,G) ( G ^ ( E & ( F ^ G ) ) )
+
+/* Process LEN bytes of BUFFER, accumulating context into CTX.
+ It is assumed that LEN % 64 == 0.
+ Most of this code comes from GnuPG's cipher/sha1.c. */
+
+void
+sha256_process_block (const void *buffer, size_t len, struct sha256_ctx *ctx)
+{
+ const uint32_t *words = buffer;
+ size_t nwords = len / sizeof (uint32_t);
+ const uint32_t *endp = words + nwords;
+ uint32_t x[16];
+ uint32_t a = ctx->state[0];
+ uint32_t b = ctx->state[1];
+ uint32_t c = ctx->state[2];
+ uint32_t d = ctx->state[3];
+ uint32_t e = ctx->state[4];
+ uint32_t f = ctx->state[5];
+ uint32_t g = ctx->state[6];
+ uint32_t h = ctx->state[7];
+
+ /* First increment the byte count. FIPS PUB 180-2 specifies the possible
+ length of the file up to 2^64 bits. Here we only compute the
+ number of bytes. Do a double word increment. */
+ ctx->total[0] += len;
+ if (ctx->total[0] < len)
+ ++ctx->total[1];
+
+#define rol(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
+#define S0(x) (rol(x,25)^rol(x,14)^(x>>3))
+#define S1(x) (rol(x,15)^rol(x,13)^(x>>10))
+#define SS0(x) (rol(x,30)^rol(x,19)^rol(x,10))
+#define SS1(x) (rol(x,26)^rol(x,21)^rol(x,7))
+
+#define M(I) ( tm = S1(x[(I-2)&0x0f]) + x[(I-7)&0x0f] \
+ + S0(x[(I-15)&0x0f]) + x[I&0x0f] \
+ , x[I&0x0f] = tm )
+
+#define R(A,B,C,D,E,F,G,H,K,M) do { t0 = SS0(A) + F2(A,B,C); \
+ t1 = H + SS1(E) \
+ + F1(E,F,G) \
+ + K \
+ + M; \
+ D += t1; H = t0 + t1; \
+ } while(0)
+
+ while (words < endp)
+ {
+ uint32_t tm;
+ uint32_t t0, t1;
+ int t;
+ /* FIXME: see sha1.c for a better implementation. */
+ for (t = 0; t < 16; t++)
+ {
+ x[t] = SWAP (*words);
+ words++;
+ }
+
+ R( a, b, c, d, e, f, g, h, K( 0), x[ 0] );
+ R( h, a, b, c, d, e, f, g, K( 1), x[ 1] );
+ R( g, h, a, b, c, d, e, f, K( 2), x[ 2] );
+ R( f, g, h, a, b, c, d, e, K( 3), x[ 3] );
+ R( e, f, g, h, a, b, c, d, K( 4), x[ 4] );
+ R( d, e, f, g, h, a, b, c, K( 5), x[ 5] );
+ R( c, d, e, f, g, h, a, b, K( 6), x[ 6] );
+ R( b, c, d, e, f, g, h, a, K( 7), x[ 7] );
+ R( a, b, c, d, e, f, g, h, K( 8), x[ 8] );
+ R( h, a, b, c, d, e, f, g, K( 9), x[ 9] );
+ R( g, h, a, b, c, d, e, f, K(10), x[10] );
+ R( f, g, h, a, b, c, d, e, K(11), x[11] );
+ R( e, f, g, h, a, b, c, d, K(12), x[12] );
+ R( d, e, f, g, h, a, b, c, K(13), x[13] );
+ R( c, d, e, f, g, h, a, b, K(14), x[14] );
+ R( b, c, d, e, f, g, h, a, K(15), x[15] );
+ R( a, b, c, d, e, f, g, h, K(16), M(16) );
+ R( h, a, b, c, d, e, f, g, K(17), M(17) );
+ R( g, h, a, b, c, d, e, f, K(18), M(18) );
+ R( f, g, h, a, b, c, d, e, K(19), M(19) );
+ R( e, f, g, h, a, b, c, d, K(20), M(20) );
+ R( d, e, f, g, h, a, b, c, K(21), M(21) );
+ R( c, d, e, f, g, h, a, b, K(22), M(22) );
+ R( b, c, d, e, f, g, h, a, K(23), M(23) );
+ R( a, b, c, d, e, f, g, h, K(24), M(24) );
+ R( h, a, b, c, d, e, f, g, K(25), M(25) );
+ R( g, h, a, b, c, d, e, f, K(26), M(26) );
+ R( f, g, h, a, b, c, d, e, K(27), M(27) );
+ R( e, f, g, h, a, b, c, d, K(28), M(28) );
+ R( d, e, f, g, h, a, b, c, K(29), M(29) );
+ R( c, d, e, f, g, h, a, b, K(30), M(30) );
+ R( b, c, d, e, f, g, h, a, K(31), M(31) );
+ R( a, b, c, d, e, f, g, h, K(32), M(32) );
+ R( h, a, b, c, d, e, f, g, K(33), M(33) );
+ R( g, h, a, b, c, d, e, f, K(34), M(34) );
+ R( f, g, h, a, b, c, d, e, K(35), M(35) );
+ R( e, f, g, h, a, b, c, d, K(36), M(36) );
+ R( d, e, f, g, h, a, b, c, K(37), M(37) );
+ R( c, d, e, f, g, h, a, b, K(38), M(38) );
+ R( b, c, d, e, f, g, h, a, K(39), M(39) );
+ R( a, b, c, d, e, f, g, h, K(40), M(40) );
+ R( h, a, b, c, d, e, f, g, K(41), M(41) );
+ R( g, h, a, b, c, d, e, f, K(42), M(42) );
+ R( f, g, h, a, b, c, d, e, K(43), M(43) );
+ R( e, f, g, h, a, b, c, d, K(44), M(44) );
+ R( d, e, f, g, h, a, b, c, K(45), M(45) );
+ R( c, d, e, f, g, h, a, b, K(46), M(46) );
+ R( b, c, d, e, f, g, h, a, K(47), M(47) );
+ R( a, b, c, d, e, f, g, h, K(48), M(48) );
+ R( h, a, b, c, d, e, f, g, K(49), M(49) );
+ R( g, h, a, b, c, d, e, f, K(50), M(50) );
+ R( f, g, h, a, b, c, d, e, K(51), M(51) );
+ R( e, f, g, h, a, b, c, d, K(52), M(52) );
+ R( d, e, f, g, h, a, b, c, K(53), M(53) );
+ R( c, d, e, f, g, h, a, b, K(54), M(54) );
+ R( b, c, d, e, f, g, h, a, K(55), M(55) );
+ R( a, b, c, d, e, f, g, h, K(56), M(56) );
+ R( h, a, b, c, d, e, f, g, K(57), M(57) );
+ R( g, h, a, b, c, d, e, f, K(58), M(58) );
+ R( f, g, h, a, b, c, d, e, K(59), M(59) );
+ R( e, f, g, h, a, b, c, d, K(60), M(60) );
+ R( d, e, f, g, h, a, b, c, K(61), M(61) );
+ R( c, d, e, f, g, h, a, b, K(62), M(62) );
+ R( b, c, d, e, f, g, h, a, K(63), M(63) );
+
+ a = ctx->state[0] += a;
+ b = ctx->state[1] += b;
+ c = ctx->state[2] += c;
+ d = ctx->state[3] += d;
+ e = ctx->state[4] += e;
+ f = ctx->state[5] += f;
+ g = ctx->state[6] += g;
+ h = ctx->state[7] += h;
+ }
+}
--- /dev/null
+/* Declarations of functions and data types used for SHA256 and SHA224 sum
+ library functions.
+ Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+
+ 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef SHA256_H
+# define SHA256_H 1
+
+# include <stdio.h>
+# include <stdint.h>
+
+/* Structure to save state of computation between the single steps. */
+struct sha256_ctx
+{
+ uint32_t state[8];
+
+ uint32_t total[2];
+ uint32_t buflen;
+ uint32_t buffer[32];
+};
+
+enum { SHA224_DIGEST_SIZE = 24 };
+enum { SHA256_DIGEST_SIZE = 32 };
+
+/* Initialize structure containing state of computation. */
+extern void sha256_init_ctx (struct sha256_ctx *ctx);
+extern void sha224_init_ctx (struct sha256_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is necessary that LEN is a multiple of 64!!! */
+extern void sha256_process_block (const void *buffer, size_t len,
+ struct sha256_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is NOT required that LEN is a multiple of 64. */
+extern void sha256_process_bytes (const void *buffer, size_t len,
+ struct sha256_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+ in first 32 (28) bytes following RESBUF. The result is always in little
+ endian byte order, so that a byte-wise output yields to the wanted
+ ASCII representation of the message digest. */
+extern void *sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf);
+extern void *sha224_finish_ctx (struct sha256_ctx *ctx, void *resbuf);
+
+
+/* Put result from CTX in first 32 (28) bytes following RESBUF. The result is
+ always in little endian byte order, so that a byte-wise output yields
+ to the wanted ASCII representation of the message digest. */
+extern void *sha256_read_ctx (const struct sha256_ctx *ctx, void *resbuf);
+extern void *sha224_read_ctx (const struct sha256_ctx *ctx, void *resbuf);
+
+
+/* Compute SHA256 (SHA224) message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 32 (28) bytes
+ beginning at RESBLOCK. */
+extern int sha256_stream (FILE *stream, void *resblock);
+extern int sha224_stream (FILE *stream, void *resblock);
+
+/* Compute SHA256 (SHA224) message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+extern void *sha256_buffer (const char *buffer, size_t len, void *resblock);
+extern void *sha224_buffer (const char *buffer, size_t len, void *resblock);
+
+#endif
--- /dev/null
+/* sha512.c - Functions to compute SHA512 and SHA384 message digest of files or
+ memory blocks according to the NIST specification FIPS-180-2.
+
+ Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+
+ 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by David Madore, considerably copypasting from
+ Scott G. Miller's sha1.c
+*/
+
+#include <config.h>
+
+#include "sha512.h"
+
+#include <stddef.h>
+#include <string.h>
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+#ifdef WORDS_BIGENDIAN
+# define SWAP(n) (n)
+#else
+# define SWAP(n) \
+ u64or (u64or (u64or (u64shl (n, 56), \
+ u64shl (u64and (n, u64lo (0x0000ff00)), 40)), \
+ u64or (u64shl (u64and (n, u64lo (0x00ff0000)), 24), \
+ u64shl (u64and (n, u64lo (0xff000000)), 8))), \
+ u64or (u64or (u64and (u64shr (n, 8), u64lo (0xff000000)), \
+ u64and (u64shr (n, 24), u64lo (0x00ff0000))), \
+ u64or (u64and (u64shr (n, 40), u64lo (0x0000ff00)), \
+ u64shr (n, 56))))
+#endif
+
+#define BLOCKSIZE 4096
+#if BLOCKSIZE % 128 != 0
+# error "invalid BLOCKSIZE"
+#endif
+
+/* This array contains the bytes used to pad the buffer to the next
+ 128-byte boundary. */
+static const unsigned char fillbuf[128] = { 0x80, 0 /* , 0, 0, ... */ };
+
+
+/*
+ Takes a pointer to a 512 bit block of data (eight 64 bit ints) and
+ intializes it to the start constants of the SHA512 algorithm. This
+ must be called before using hash in the call to sha512_hash
+*/
+void
+sha512_init_ctx (struct sha512_ctx *ctx)
+{
+ ctx->state[0] = u64hilo (0x6a09e667, 0xf3bcc908);
+ ctx->state[1] = u64hilo (0xbb67ae85, 0x84caa73b);
+ ctx->state[2] = u64hilo (0x3c6ef372, 0xfe94f82b);
+ ctx->state[3] = u64hilo (0xa54ff53a, 0x5f1d36f1);
+ ctx->state[4] = u64hilo (0x510e527f, 0xade682d1);
+ ctx->state[5] = u64hilo (0x9b05688c, 0x2b3e6c1f);
+ ctx->state[6] = u64hilo (0x1f83d9ab, 0xfb41bd6b);
+ ctx->state[7] = u64hilo (0x5be0cd19, 0x137e2179);
+
+ ctx->total[0] = ctx->total[1] = u64lo (0);
+ ctx->buflen = 0;
+}
+
+void
+sha384_init_ctx (struct sha512_ctx *ctx)
+{
+ ctx->state[0] = u64hilo (0xcbbb9d5d, 0xc1059ed8);
+ ctx->state[1] = u64hilo (0x629a292a, 0x367cd507);
+ ctx->state[2] = u64hilo (0x9159015a, 0x3070dd17);
+ ctx->state[3] = u64hilo (0x152fecd8, 0xf70e5939);
+ ctx->state[4] = u64hilo (0x67332667, 0xffc00b31);
+ ctx->state[5] = u64hilo (0x8eb44a87, 0x68581511);
+ ctx->state[6] = u64hilo (0xdb0c2e0d, 0x64f98fa7);
+ ctx->state[7] = u64hilo (0x47b5481d, 0xbefa4fa4);
+
+ ctx->total[0] = ctx->total[1] = u64lo (0);
+ ctx->buflen = 0;
+}
+
+/* Copy the value from V into the memory location pointed to by *CP,
+ If your architecture allows unaligned access, this is equivalent to
+ * (__typeof__ (v) *) cp = v */
+static inline void
+set_uint64 (char *cp, u64 v)
+{
+ memcpy (cp, &v, sizeof v);
+}
+
+/* Put result from CTX in first 64 bytes following RESBUF.
+ The result must be in little endian byte order. */
+void *
+sha512_read_ctx (const struct sha512_ctx *ctx, void *resbuf)
+{
+ int i;
+ char *r = resbuf;
+
+ for (i = 0; i < 8; i++)
+ set_uint64 (r + i * sizeof ctx->state[0], SWAP (ctx->state[i]));
+
+ return resbuf;
+}
+
+void *
+sha384_read_ctx (const struct sha512_ctx *ctx, void *resbuf)
+{
+ int i;
+ char *r = resbuf;
+
+ for (i = 0; i < 6; i++)
+ set_uint64 (r + i * sizeof ctx->state[0], SWAP (ctx->state[i]));
+
+ return resbuf;
+}
+
+/* Process the remaining bytes in the internal buffer and the usual
+ prolog according to the standard and write the result to RESBUF. */
+static void
+sha512_conclude_ctx (struct sha512_ctx *ctx)
+{
+ /* Take yet unprocessed bytes into account. */
+ size_t bytes = ctx->buflen;
+ size_t size = (bytes < 112) ? 128 / 8 : 128 * 2 / 8;
+
+ /* Now count remaining bytes. */
+ ctx->total[0] = u64plus (ctx->total[0], u64lo (bytes));
+ if (u64lt (ctx->total[0], u64lo (bytes)))
+ ctx->total[1] = u64plus (ctx->total[1], u64lo (1));
+
+ /* Put the 64-bit file length in *bits* at the end of the buffer. */
+ ctx->buffer[size - 2] = SWAP (u64or (u64shl (ctx->total[1], 3),
+ u64shr (ctx->total[0], 61)));
+ ctx->buffer[size - 1] = SWAP (u64shl (ctx->total[0], 3));
+
+ memcpy (&((char *) ctx->buffer)[bytes], fillbuf, (size - 2) * 8 - bytes);
+
+ /* Process last bytes. */
+ sha512_process_block (ctx->buffer, size * 8, ctx);
+}
+
+void *
+sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf)
+{
+ sha512_conclude_ctx (ctx);
+ return sha512_read_ctx (ctx, resbuf);
+}
+
+void *
+sha384_finish_ctx (struct sha512_ctx *ctx, void *resbuf)
+{
+ sha512_conclude_ctx (ctx);
+ return sha384_read_ctx (ctx, resbuf);
+}
+
+/* Compute SHA512 message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 64 bytes
+ beginning at RESBLOCK. */
+int
+sha512_stream (FILE *stream, void *resblock)
+{
+ struct sha512_ctx ctx;
+ char buffer[BLOCKSIZE + 72];
+ size_t sum;
+
+ /* Initialize the computation context. */
+ sha512_init_ctx (&ctx);
+
+ /* Iterate over full file contents. */
+ while (1)
+ {
+ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
+ computation function processes the whole buffer so that with the
+ next round of the loop another block can be read. */
+ size_t n;
+ sum = 0;
+
+ /* Read block. Take care for partial reads. */
+ while (1)
+ {
+ n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
+
+ sum += n;
+
+ if (sum == BLOCKSIZE)
+ break;
+
+ if (n == 0)
+ {
+ /* Check for the error flag IFF N == 0, so that we don't
+ exit the loop after a partial read due to e.g., EAGAIN
+ or EWOULDBLOCK. */
+ if (ferror (stream))
+ return 1;
+ goto process_partial_block;
+ }
+
+ /* We've read at least one byte, so ignore errors. But always
+ check for EOF, since feof may be true even though N > 0.
+ Otherwise, we could end up calling fread after EOF. */
+ if (feof (stream))
+ goto process_partial_block;
+ }
+
+ /* Process buffer with BLOCKSIZE bytes. Note that
+ BLOCKSIZE % 128 == 0
+ */
+ sha512_process_block (buffer, BLOCKSIZE, &ctx);
+ }
+
+ process_partial_block:;
+
+ /* Process any remaining bytes. */
+ if (sum > 0)
+ sha512_process_bytes (buffer, sum, &ctx);
+
+ /* Construct result in desired memory. */
+ sha512_finish_ctx (&ctx, resblock);
+ return 0;
+}
+
+/* FIXME: Avoid code duplication */
+int
+sha384_stream (FILE *stream, void *resblock)
+{
+ struct sha512_ctx ctx;
+ char buffer[BLOCKSIZE + 72];
+ size_t sum;
+
+ /* Initialize the computation context. */
+ sha384_init_ctx (&ctx);
+
+ /* Iterate over full file contents. */
+ while (1)
+ {
+ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
+ computation function processes the whole buffer so that with the
+ next round of the loop another block can be read. */
+ size_t n;
+ sum = 0;
+
+ /* Read block. Take care for partial reads. */
+ while (1)
+ {
+ n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
+
+ sum += n;
+
+ if (sum == BLOCKSIZE)
+ break;
+
+ if (n == 0)
+ {
+ /* Check for the error flag IFF N == 0, so that we don't
+ exit the loop after a partial read due to e.g., EAGAIN
+ or EWOULDBLOCK. */
+ if (ferror (stream))
+ return 1;
+ goto process_partial_block;
+ }
+
+ /* We've read at least one byte, so ignore errors. But always
+ check for EOF, since feof may be true even though N > 0.
+ Otherwise, we could end up calling fread after EOF. */
+ if (feof (stream))
+ goto process_partial_block;
+ }
+
+ /* Process buffer with BLOCKSIZE bytes. Note that
+ BLOCKSIZE % 128 == 0
+ */
+ sha512_process_block (buffer, BLOCKSIZE, &ctx);
+ }
+
+ process_partial_block:;
+
+ /* Process any remaining bytes. */
+ if (sum > 0)
+ sha512_process_bytes (buffer, sum, &ctx);
+
+ /* Construct result in desired memory. */
+ sha384_finish_ctx (&ctx, resblock);
+ return 0;
+}
+
+/* Compute SHA512 message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+void *
+sha512_buffer (const char *buffer, size_t len, void *resblock)
+{
+ struct sha512_ctx ctx;
+
+ /* Initialize the computation context. */
+ sha512_init_ctx (&ctx);
+
+ /* Process whole buffer but last len % 128 bytes. */
+ sha512_process_bytes (buffer, len, &ctx);
+
+ /* Put result in desired memory area. */
+ return sha512_finish_ctx (&ctx, resblock);
+}
+
+void *
+sha384_buffer (const char *buffer, size_t len, void *resblock)
+{
+ struct sha512_ctx ctx;
+
+ /* Initialize the computation context. */
+ sha384_init_ctx (&ctx);
+
+ /* Process whole buffer but last len % 128 bytes. */
+ sha512_process_bytes (buffer, len, &ctx);
+
+ /* Put result in desired memory area. */
+ return sha384_finish_ctx (&ctx, resblock);
+}
+
+void
+sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
+{
+ /* When we already have some bits in our internal buffer concatenate
+ both inputs first. */
+ if (ctx->buflen != 0)
+ {
+ size_t left_over = ctx->buflen;
+ size_t add = 256 - left_over > len ? len : 256 - left_over;
+
+ memcpy (&((char *) ctx->buffer)[left_over], buffer, add);
+ ctx->buflen += add;
+
+ if (ctx->buflen > 128)
+ {
+ sha512_process_block (ctx->buffer, ctx->buflen & ~127, ctx);
+
+ ctx->buflen &= 127;
+ /* The regions in the following copy operation cannot overlap. */
+ memcpy (ctx->buffer,
+ &((char *) ctx->buffer)[(left_over + add) & ~127],
+ ctx->buflen);
+ }
+
+ buffer = (const char *) buffer + add;
+ len -= add;
+ }
+
+ /* Process available complete blocks. */
+ if (len >= 128)
+ {
+#if !_STRING_ARCH_unaligned
+# define alignof(type) offsetof (struct { char c; type x; }, x)
+# define UNALIGNED_P(p) (((size_t) p) % alignof (u64) != 0)
+ if (UNALIGNED_P (buffer))
+ while (len > 128)
+ {
+ sha512_process_block (memcpy (ctx->buffer, buffer, 128), 128, ctx);
+ buffer = (const char *) buffer + 128;
+ len -= 128;
+ }
+ else
+#endif
+ {
+ sha512_process_block (buffer, len & ~127, ctx);
+ buffer = (const char *) buffer + (len & ~127);
+ len &= 127;
+ }
+ }
+
+ /* Move remaining bytes in internal buffer. */
+ if (len > 0)
+ {
+ size_t left_over = ctx->buflen;
+
+ memcpy (&((char *) ctx->buffer)[left_over], buffer, len);
+ left_over += len;
+ if (left_over >= 128)
+ {
+ sha512_process_block (ctx->buffer, 128, ctx);
+ left_over -= 128;
+ memcpy (ctx->buffer, &ctx->buffer[16], left_over);
+ }
+ ctx->buflen = left_over;
+ }
+}
+
+/* --- Code below is the primary difference between sha1.c and sha512.c --- */
+
+/* SHA512 round constants */
+#define K(I) sha512_round_constants[I]
+static u64 const sha512_round_constants[80] = {
+ u64init (0x428a2f98, 0xd728ae22), u64init (0x71374491, 0x23ef65cd),
+ u64init (0xb5c0fbcf, 0xec4d3b2f), u64init (0xe9b5dba5, 0x8189dbbc),
+ u64init (0x3956c25b, 0xf348b538), u64init (0x59f111f1, 0xb605d019),
+ u64init (0x923f82a4, 0xaf194f9b), u64init (0xab1c5ed5, 0xda6d8118),
+ u64init (0xd807aa98, 0xa3030242), u64init (0x12835b01, 0x45706fbe),
+ u64init (0x243185be, 0x4ee4b28c), u64init (0x550c7dc3, 0xd5ffb4e2),
+ u64init (0x72be5d74, 0xf27b896f), u64init (0x80deb1fe, 0x3b1696b1),
+ u64init (0x9bdc06a7, 0x25c71235), u64init (0xc19bf174, 0xcf692694),
+ u64init (0xe49b69c1, 0x9ef14ad2), u64init (0xefbe4786, 0x384f25e3),
+ u64init (0x0fc19dc6, 0x8b8cd5b5), u64init (0x240ca1cc, 0x77ac9c65),
+ u64init (0x2de92c6f, 0x592b0275), u64init (0x4a7484aa, 0x6ea6e483),
+ u64init (0x5cb0a9dc, 0xbd41fbd4), u64init (0x76f988da, 0x831153b5),
+ u64init (0x983e5152, 0xee66dfab), u64init (0xa831c66d, 0x2db43210),
+ u64init (0xb00327c8, 0x98fb213f), u64init (0xbf597fc7, 0xbeef0ee4),
+ u64init (0xc6e00bf3, 0x3da88fc2), u64init (0xd5a79147, 0x930aa725),
+ u64init (0x06ca6351, 0xe003826f), u64init (0x14292967, 0x0a0e6e70),
+ u64init (0x27b70a85, 0x46d22ffc), u64init (0x2e1b2138, 0x5c26c926),
+ u64init (0x4d2c6dfc, 0x5ac42aed), u64init (0x53380d13, 0x9d95b3df),
+ u64init (0x650a7354, 0x8baf63de), u64init (0x766a0abb, 0x3c77b2a8),
+ u64init (0x81c2c92e, 0x47edaee6), u64init (0x92722c85, 0x1482353b),
+ u64init (0xa2bfe8a1, 0x4cf10364), u64init (0xa81a664b, 0xbc423001),
+ u64init (0xc24b8b70, 0xd0f89791), u64init (0xc76c51a3, 0x0654be30),
+ u64init (0xd192e819, 0xd6ef5218), u64init (0xd6990624, 0x5565a910),
+ u64init (0xf40e3585, 0x5771202a), u64init (0x106aa070, 0x32bbd1b8),
+ u64init (0x19a4c116, 0xb8d2d0c8), u64init (0x1e376c08, 0x5141ab53),
+ u64init (0x2748774c, 0xdf8eeb99), u64init (0x34b0bcb5, 0xe19b48a8),
+ u64init (0x391c0cb3, 0xc5c95a63), u64init (0x4ed8aa4a, 0xe3418acb),
+ u64init (0x5b9cca4f, 0x7763e373), u64init (0x682e6ff3, 0xd6b2b8a3),
+ u64init (0x748f82ee, 0x5defb2fc), u64init (0x78a5636f, 0x43172f60),
+ u64init (0x84c87814, 0xa1f0ab72), u64init (0x8cc70208, 0x1a6439ec),
+ u64init (0x90befffa, 0x23631e28), u64init (0xa4506ceb, 0xde82bde9),
+ u64init (0xbef9a3f7, 0xb2c67915), u64init (0xc67178f2, 0xe372532b),
+ u64init (0xca273ece, 0xea26619c), u64init (0xd186b8c7, 0x21c0c207),
+ u64init (0xeada7dd6, 0xcde0eb1e), u64init (0xf57d4f7f, 0xee6ed178),
+ u64init (0x06f067aa, 0x72176fba), u64init (0x0a637dc5, 0xa2c898a6),
+ u64init (0x113f9804, 0xbef90dae), u64init (0x1b710b35, 0x131c471b),
+ u64init (0x28db77f5, 0x23047d84), u64init (0x32caab7b, 0x40c72493),
+ u64init (0x3c9ebe0a, 0x15c9bebc), u64init (0x431d67c4, 0x9c100d4c),
+ u64init (0x4cc5d4be, 0xcb3e42b6), u64init (0x597f299c, 0xfc657e2a),
+ u64init (0x5fcb6fab, 0x3ad6faec), u64init (0x6c44198c, 0x4a475817),
+};
+
+/* Round functions. */
+#define F2(A, B, C) u64or (u64and (A, B), u64and (C, u64or (A, B)))
+#define F1(E, F, G) u64xor (G, u64and (E, u64xor (F, G)))
+
+/* Process LEN bytes of BUFFER, accumulating context into CTX.
+ It is assumed that LEN % 128 == 0.
+ Most of this code comes from GnuPG's cipher/sha1.c. */
+
+void
+sha512_process_block (const void *buffer, size_t len, struct sha512_ctx *ctx)
+{
+ u64 const *words = buffer;
+ u64 const *endp = words + len / sizeof (u64);
+ u64 x[16];
+ u64 a = ctx->state[0];
+ u64 b = ctx->state[1];
+ u64 c = ctx->state[2];
+ u64 d = ctx->state[3];
+ u64 e = ctx->state[4];
+ u64 f = ctx->state[5];
+ u64 g = ctx->state[6];
+ u64 h = ctx->state[7];
+
+ /* First increment the byte count. FIPS PUB 180-2 specifies the possible
+ length of the file up to 2^128 bits. Here we only compute the
+ number of bytes. Do a double word increment. */
+ ctx->total[0] = u64plus (ctx->total[0], u64lo (len));
+ if (u64lt (ctx->total[0], u64lo (len)))
+ ctx->total[1] = u64plus (ctx->total[1], u64lo (1));
+
+#define S0(x) u64xor (u64rol(x, 63), u64xor (u64rol (x, 56), u64shr (x, 7)))
+#define S1(x) u64xor (u64rol (x, 45), u64xor (u64rol (x, 3), u64shr (x, 6)))
+#define SS0(x) u64xor (u64rol (x, 36), u64xor (u64rol (x, 30), u64rol (x, 25)))
+#define SS1(x) u64xor (u64rol(x, 50), u64xor (u64rol (x, 46), u64rol (x, 23)))
+
+#define M(I) (x[(I) & 15] \
+ = u64plus (x[(I) & 15], \
+ u64plus (S1 (x[((I) - 2) & 15]), \
+ u64plus (x[((I) - 7) & 15], \
+ S0 (x[((I) - 15) & 15])))))
+
+#define R(A, B, C, D, E, F, G, H, K, M) \
+ do \
+ { \
+ u64 t0 = u64plus (SS0 (A), F2 (A, B, C)); \
+ u64 t1 = \
+ u64plus (H, u64plus (SS1 (E), \
+ u64plus (F1 (E, F, G), u64plus (K, M)))); \
+ D = u64plus (D, t1); \
+ H = u64plus (t0, t1); \
+ } \
+ while (0)
+
+ while (words < endp)
+ {
+ int t;
+ /* FIXME: see sha1.c for a better implementation. */
+ for (t = 0; t < 16; t++)
+ {
+ x[t] = SWAP (*words);
+ words++;
+ }
+
+ R( a, b, c, d, e, f, g, h, K( 0), x[ 0] );
+ R( h, a, b, c, d, e, f, g, K( 1), x[ 1] );
+ R( g, h, a, b, c, d, e, f, K( 2), x[ 2] );
+ R( f, g, h, a, b, c, d, e, K( 3), x[ 3] );
+ R( e, f, g, h, a, b, c, d, K( 4), x[ 4] );
+ R( d, e, f, g, h, a, b, c, K( 5), x[ 5] );
+ R( c, d, e, f, g, h, a, b, K( 6), x[ 6] );
+ R( b, c, d, e, f, g, h, a, K( 7), x[ 7] );
+ R( a, b, c, d, e, f, g, h, K( 8), x[ 8] );
+ R( h, a, b, c, d, e, f, g, K( 9), x[ 9] );
+ R( g, h, a, b, c, d, e, f, K(10), x[10] );
+ R( f, g, h, a, b, c, d, e, K(11), x[11] );
+ R( e, f, g, h, a, b, c, d, K(12), x[12] );
+ R( d, e, f, g, h, a, b, c, K(13), x[13] );
+ R( c, d, e, f, g, h, a, b, K(14), x[14] );
+ R( b, c, d, e, f, g, h, a, K(15), x[15] );
+ R( a, b, c, d, e, f, g, h, K(16), M(16) );
+ R( h, a, b, c, d, e, f, g, K(17), M(17) );
+ R( g, h, a, b, c, d, e, f, K(18), M(18) );
+ R( f, g, h, a, b, c, d, e, K(19), M(19) );
+ R( e, f, g, h, a, b, c, d, K(20), M(20) );
+ R( d, e, f, g, h, a, b, c, K(21), M(21) );
+ R( c, d, e, f, g, h, a, b, K(22), M(22) );
+ R( b, c, d, e, f, g, h, a, K(23), M(23) );
+ R( a, b, c, d, e, f, g, h, K(24), M(24) );
+ R( h, a, b, c, d, e, f, g, K(25), M(25) );
+ R( g, h, a, b, c, d, e, f, K(26), M(26) );
+ R( f, g, h, a, b, c, d, e, K(27), M(27) );
+ R( e, f, g, h, a, b, c, d, K(28), M(28) );
+ R( d, e, f, g, h, a, b, c, K(29), M(29) );
+ R( c, d, e, f, g, h, a, b, K(30), M(30) );
+ R( b, c, d, e, f, g, h, a, K(31), M(31) );
+ R( a, b, c, d, e, f, g, h, K(32), M(32) );
+ R( h, a, b, c, d, e, f, g, K(33), M(33) );
+ R( g, h, a, b, c, d, e, f, K(34), M(34) );
+ R( f, g, h, a, b, c, d, e, K(35), M(35) );
+ R( e, f, g, h, a, b, c, d, K(36), M(36) );
+ R( d, e, f, g, h, a, b, c, K(37), M(37) );
+ R( c, d, e, f, g, h, a, b, K(38), M(38) );
+ R( b, c, d, e, f, g, h, a, K(39), M(39) );
+ R( a, b, c, d, e, f, g, h, K(40), M(40) );
+ R( h, a, b, c, d, e, f, g, K(41), M(41) );
+ R( g, h, a, b, c, d, e, f, K(42), M(42) );
+ R( f, g, h, a, b, c, d, e, K(43), M(43) );
+ R( e, f, g, h, a, b, c, d, K(44), M(44) );
+ R( d, e, f, g, h, a, b, c, K(45), M(45) );
+ R( c, d, e, f, g, h, a, b, K(46), M(46) );
+ R( b, c, d, e, f, g, h, a, K(47), M(47) );
+ R( a, b, c, d, e, f, g, h, K(48), M(48) );
+ R( h, a, b, c, d, e, f, g, K(49), M(49) );
+ R( g, h, a, b, c, d, e, f, K(50), M(50) );
+ R( f, g, h, a, b, c, d, e, K(51), M(51) );
+ R( e, f, g, h, a, b, c, d, K(52), M(52) );
+ R( d, e, f, g, h, a, b, c, K(53), M(53) );
+ R( c, d, e, f, g, h, a, b, K(54), M(54) );
+ R( b, c, d, e, f, g, h, a, K(55), M(55) );
+ R( a, b, c, d, e, f, g, h, K(56), M(56) );
+ R( h, a, b, c, d, e, f, g, K(57), M(57) );
+ R( g, h, a, b, c, d, e, f, K(58), M(58) );
+ R( f, g, h, a, b, c, d, e, K(59), M(59) );
+ R( e, f, g, h, a, b, c, d, K(60), M(60) );
+ R( d, e, f, g, h, a, b, c, K(61), M(61) );
+ R( c, d, e, f, g, h, a, b, K(62), M(62) );
+ R( b, c, d, e, f, g, h, a, K(63), M(63) );
+ R( a, b, c, d, e, f, g, h, K(64), M(64) );
+ R( h, a, b, c, d, e, f, g, K(65), M(65) );
+ R( g, h, a, b, c, d, e, f, K(66), M(66) );
+ R( f, g, h, a, b, c, d, e, K(67), M(67) );
+ R( e, f, g, h, a, b, c, d, K(68), M(68) );
+ R( d, e, f, g, h, a, b, c, K(69), M(69) );
+ R( c, d, e, f, g, h, a, b, K(70), M(70) );
+ R( b, c, d, e, f, g, h, a, K(71), M(71) );
+ R( a, b, c, d, e, f, g, h, K(72), M(72) );
+ R( h, a, b, c, d, e, f, g, K(73), M(73) );
+ R( g, h, a, b, c, d, e, f, K(74), M(74) );
+ R( f, g, h, a, b, c, d, e, K(75), M(75) );
+ R( e, f, g, h, a, b, c, d, K(76), M(76) );
+ R( d, e, f, g, h, a, b, c, K(77), M(77) );
+ R( c, d, e, f, g, h, a, b, K(78), M(78) );
+ R( b, c, d, e, f, g, h, a, K(79), M(79) );
+
+ a = ctx->state[0] = u64plus (ctx->state[0], a);
+ b = ctx->state[1] = u64plus (ctx->state[1], b);
+ c = ctx->state[2] = u64plus (ctx->state[2], c);
+ d = ctx->state[3] = u64plus (ctx->state[3], d);
+ e = ctx->state[4] = u64plus (ctx->state[4], e);
+ f = ctx->state[5] = u64plus (ctx->state[5], f);
+ g = ctx->state[6] = u64plus (ctx->state[6], g);
+ h = ctx->state[7] = u64plus (ctx->state[7], h);
+ }
+}
--- /dev/null
+/* Declarations of functions and data types used for SHA512 and SHA384 sum
+ library functions.
+ Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+
+ 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef SHA512_H
+# define SHA512_H 1
+
+# include <stdio.h>
+
+# include "u64.h"
+
+/* Structure to save state of computation between the single steps. */
+struct sha512_ctx
+{
+ u64 state[8];
+
+ u64 total[2];
+ size_t buflen;
+ u64 buffer[32];
+};
+
+enum { SHA384_DIGEST_SIZE = 48 };
+enum { SHA512_DIGEST_SIZE = 64 };
+
+/* Initialize structure containing state of computation. */
+extern void sha512_init_ctx (struct sha512_ctx *ctx);
+extern void sha384_init_ctx (struct sha512_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is necessary that LEN is a multiple of 128!!! */
+extern void sha512_process_block (const void *buffer, size_t len,
+ struct sha512_ctx *ctx);
+
+/* Starting with the result of former calls of this function (or the
+ initialization function update the context for the next LEN bytes
+ starting at BUFFER.
+ It is NOT required that LEN is a multiple of 128. */
+extern void sha512_process_bytes (const void *buffer, size_t len,
+ struct sha512_ctx *ctx);
+
+/* Process the remaining bytes in the buffer and put result from CTX
+ in first 64 (48) bytes following RESBUF. The result is always in little
+ endian byte order, so that a byte-wise output yields to the wanted
+ ASCII representation of the message digest. */
+extern void *sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf);
+extern void *sha384_finish_ctx (struct sha512_ctx *ctx, void *resbuf);
+
+
+/* Put result from CTX in first 64 (48) bytes following RESBUF. The result is
+ always in little endian byte order, so that a byte-wise output yields
+ to the wanted ASCII representation of the message digest.
+
+ IMPORTANT: On some systems it is required that RESBUF is correctly
+ aligned for a 32 bits value. */
+extern void *sha512_read_ctx (const struct sha512_ctx *ctx, void *resbuf);
+extern void *sha384_read_ctx (const struct sha512_ctx *ctx, void *resbuf);
+
+
+/* Compute SHA512 (SHA384) message digest for bytes read from STREAM. The
+ resulting message digest number will be written into the 64 (48) bytes
+ beginning at RESBLOCK. */
+extern int sha512_stream (FILE *stream, void *resblock);
+extern int sha384_stream (FILE *stream, void *resblock);
+
+/* Compute SHA512 (SHA384) message digest for LEN bytes beginning at BUFFER. The
+ result is always in little endian byte order, so that a byte-wise
+ output yields to the wanted ASCII representation of the message
+ digest. */
+extern void *sha512_buffer (const char *buffer, size_t len, void *resblock);
+extern void *sha384_buffer (const char *buffer, size_t len, void *resblock);
+
+#endif
--- /dev/null
+/* uint64_t-like operations that work even on hosts lacking uint64_t
+
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+ 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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert. */
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* Return X rotated left by N bits, where 0 < N < 64. */
+#define u64rol(x, n) u64or (u64shl (x, n), u64shr (x, 64 - n))
+
+#ifdef UINT64_MAX
+
+/* Native implementations are trivial. See below for comments on what
+ these operations do. */
+typedef uint64_t u64;
+# define u64hilo(hi, lo) ((u64) (((u64) (hi) << 32) + (lo)))
+# define u64init(hi, lo) u64hilo (hi, lo)
+# define u64lo(x) ((u64) (x))
+# define u64lt(x, y) ((x) < (y))
+# define u64and(x, y) ((x) & (y))
+# define u64or(x, y) ((x) | (y))
+# define u64xor(x, y) ((x) ^ (y))
+# define u64plus(x, y) ((x) + (y))
+# define u64shl(x, n) ((x) << (n))
+# define u64shr(x, n) ((x) >> (n))
+
+#else
+
+/* u64 is a 64-bit unsigned integer value.
+ u64init (HI, LO), is like u64hilo (HI, LO), but for use in
+ initializer contexts. */
+# ifdef WORDS_BIGENDIAN
+typedef struct { uint32_t hi, lo; } u64;
+# define u64init(hi, lo) { hi, lo }
+# else
+typedef struct { uint32_t lo, hi; } u64;
+# define u64init(hi, lo) { lo, hi }
+# endif
+
+/* Given the high and low-order 32-bit quantities HI and LO, return a u64
+ value representing (HI << 32) + LO. */
+static inline u64
+u64hilo (uint32_t hi, uint32_t lo)
+{
+ u64 r;
+ r.hi = hi;
+ r.lo = lo;
+ return r;
+}
+
+/* Return a u64 value representing LO. */
+static inline u64
+u64lo (uint32_t lo)
+{
+ u64 r;
+ r.hi = 0;
+ r.lo = lo;
+ return r;
+}
+
+/* Return X < Y. */
+static inline int
+u64lt (u64 x, u64 y)
+{
+ return x.hi < y.hi || (x.hi == y.hi && x.lo < y.lo);
+}
+
+/* Return X & Y. */
+static inline u64
+u64and (u64 x, u64 y)
+{
+ u64 r;
+ r.hi = x.hi & y.hi;
+ r.lo = x.lo & y.lo;
+ return r;
+}
+
+/* Return X | Y. */
+static inline u64
+u64or (u64 x, u64 y)
+{
+ u64 r;
+ r.hi = x.hi | y.hi;
+ r.lo = x.lo | y.lo;
+ return r;
+}
+
+/* Return X ^ Y. */
+static inline u64
+u64xor (u64 x, u64 y)
+{
+ u64 r;
+ r.hi = x.hi ^ y.hi;
+ r.lo = x.lo ^ y.lo;
+ return r;
+}
+
+/* Return X + Y. */
+static inline u64
+u64plus (u64 x, u64 y)
+{
+ u64 r;
+ r.lo = x.lo + y.lo;
+ r.hi = x.hi + y.hi + (r.lo < x.lo);
+ return r;
+}
+
+/* Return X << N. */
+static inline u64
+u64shl (u64 x, int n)
+{
+ u64 r;
+ if (n < 32)
+ {
+ r.hi = (x.hi << n) | (x.lo >> (32 - n));
+ r.lo = x.lo << n;
+ }
+ else
+ {
+ r.hi = x.lo << (n - 32);
+ r.lo = 0;
+ }
+ return r;
+}
+
+/* Return X >> N. */
+static inline u64
+u64shr (u64 x, int n)
+{
+ u64 r;
+ if (n < 32)
+ {
+ r.hi = x.hi >> n;
+ r.lo = (x.hi << (32 - n)) | (x.lo >> n);
+ }
+ else
+ {
+ r.hi = 0;
+ r.lo = x.hi >> (n - 32);
+ }
+ return r;
+}
+
+#endif
--- /dev/null
+# sha256.m4 serial 2
+dnl Copyright (C) 2005, 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_SHA256],
+[
+ AC_LIBOBJ([sha256])
+
+ dnl Prerequisites of lib/sha256.c.
+ AC_REQUIRE([AC_C_BIGENDIAN])
+])
--- /dev/null
+# sha512.m4 serial 3
+dnl Copyright (C) 2005, 2006, 2008 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_SHA512],
+[
+ AC_LIBOBJ([sha512])
+
+ dnl Prerequisites of lib/sha512.c.
+ AC_REQUIRE([AC_C_BIGENDIAN])
+])
--- /dev/null
+Description:
+Compute SHA224 and SHA256 checksums.
+
+Files:
+lib/sha256.h
+lib/sha256.c
+m4/sha256.m4
+
+Depends-on:
+stdint
+
+configure.ac:
+gl_SHA256
+
+Makefile.am:
+
+Include:
+"sha256.h"
+
+License:
+LGPLv2+
+
+Maintainer:
+Jim Meyering
--- /dev/null
+Description:
+Compute SHA384 and SHA512 checksums.
+
+Files:
+lib/sha512.h
+lib/sha512.c
+m4/sha512.m4
+lib/u64.h
+
+Depends-on:
+stdint
+
+configure.ac:
+gl_SHA512
+
+Makefile.am:
+
+Include:
+"sha512.h"
+
+License:
+LGPLv2+
+
+Maintainer:
+Jim Meyering
projects / gnulib.git / commitdiff