mirror of
https://git.notmuchmail.org/git/notmuch
synced 2024-12-27 11:51:42 +01:00
1465493210
A "make" invocation still works from the top-level, but not from down inside the lib directory yet.
242 lines
8 KiB
C
242 lines
8 KiB
C
/*
|
|
---------------------------------------------------------------------------
|
|
Copyright (c) 2002, Dr Brian Gladman, Worcester, UK. All rights reserved.
|
|
|
|
LICENSE TERMS
|
|
|
|
The free distribution and use of this software in both source and binary
|
|
form is allowed (with or without changes) provided that:
|
|
|
|
1. distributions of this source code include the above copyright
|
|
notice, this list of conditions and the following disclaimer;
|
|
|
|
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;
|
|
|
|
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.
|
|
|
|
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: 01/08/2005
|
|
|
|
This is a byte oriented version of SHA1 that operates on arrays of bytes
|
|
stored in memory.
|
|
*/
|
|
|
|
#include <string.h> /* for memcpy() etc. */
|
|
|
|
#include "libsha1.h"
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
#define SHA1_BLOCK_SIZE 64
|
|
|
|
#define rotl32(x,n) (((x) << n) | ((x) >> (32 - n)))
|
|
#define rotr32(x,n) (((x) >> n) | ((x) << (32 - n)))
|
|
|
|
#define bswap_32(x) ((rotr32((x), 24) & 0x00ff00ff) | (rotr32((x), 8) & 0xff00ff00))
|
|
|
|
#if (PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN)
|
|
#define bsw_32(p,n) \
|
|
{ int _i = (n); while(_i--) ((uint32_t*)p)[_i] = bswap_32(((uint32_t*)p)[_i]); }
|
|
#else
|
|
#define bsw_32(p,n)
|
|
#endif
|
|
|
|
#define SHA1_MASK (SHA1_BLOCK_SIZE - 1)
|
|
|
|
#if 0
|
|
|
|
#define ch(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
|
|
#define parity(x,y,z) ((x) ^ (y) ^ (z))
|
|
#define maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
|
|
|
|
#else /* Discovered by Rich Schroeppel and Colin Plumb */
|
|
|
|
#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))))
|
|
|
|
#endif
|
|
|
|
/* Compile 64 bytes of hash data into SHA1 context. Note */
|
|
/* that this routine assumes that the byte order in the */
|
|
/* ctx->wbuf[] at this point is in such an order that low */
|
|
/* address bytes in the ORIGINAL byte stream will go in */
|
|
/* this buffer to the high end of 32-bit words on BOTH big */
|
|
/* and little endian systems */
|
|
|
|
#ifdef ARRAY
|
|
#define q(v,n) v[n]
|
|
#else
|
|
#define q(v,n) v##n
|
|
#endif
|
|
|
|
#define one_cycle(v,a,b,c,d,e,f,k,h) \
|
|
q(v,e) += rotr32(q(v,a),27) + \
|
|
f(q(v,b),q(v,c),q(v,d)) + k + h; \
|
|
q(v,b) = rotr32(q(v,b), 2)
|
|
|
|
#define five_cycle(v,f,k,i) \
|
|
one_cycle(v, 0,1,2,3,4, f,k,hf(i )); \
|
|
one_cycle(v, 4,0,1,2,3, f,k,hf(i+1)); \
|
|
one_cycle(v, 3,4,0,1,2, f,k,hf(i+2)); \
|
|
one_cycle(v, 2,3,4,0,1, f,k,hf(i+3)); \
|
|
one_cycle(v, 1,2,3,4,0, f,k,hf(i+4))
|
|
|
|
static void sha1_compile(sha1_ctx ctx[1])
|
|
{ uint32_t *w = ctx->wbuf;
|
|
|
|
#ifdef ARRAY
|
|
uint32_t v[5];
|
|
memcpy(v, ctx->hash, 5 * sizeof(uint32_t));
|
|
#else
|
|
uint32_t v0, v1, v2, v3, v4;
|
|
v0 = ctx->hash[0]; v1 = ctx->hash[1];
|
|
v2 = ctx->hash[2]; v3 = ctx->hash[3];
|
|
v4 = ctx->hash[4];
|
|
#endif
|
|
|
|
#define hf(i) w[i]
|
|
|
|
five_cycle(v, ch, 0x5a827999, 0);
|
|
five_cycle(v, ch, 0x5a827999, 5);
|
|
five_cycle(v, ch, 0x5a827999, 10);
|
|
one_cycle(v,0,1,2,3,4, ch, 0x5a827999, hf(15)); \
|
|
|
|
#undef hf
|
|
#define hf(i) (w[(i) & 15] = rotl32( \
|
|
w[((i) + 13) & 15] ^ w[((i) + 8) & 15] \
|
|
^ w[((i) + 2) & 15] ^ w[(i) & 15], 1))
|
|
|
|
one_cycle(v,4,0,1,2,3, ch, 0x5a827999, hf(16));
|
|
one_cycle(v,3,4,0,1,2, ch, 0x5a827999, hf(17));
|
|
one_cycle(v,2,3,4,0,1, ch, 0x5a827999, hf(18));
|
|
one_cycle(v,1,2,3,4,0, ch, 0x5a827999, hf(19));
|
|
|
|
five_cycle(v, parity, 0x6ed9eba1, 20);
|
|
five_cycle(v, parity, 0x6ed9eba1, 25);
|
|
five_cycle(v, parity, 0x6ed9eba1, 30);
|
|
five_cycle(v, parity, 0x6ed9eba1, 35);
|
|
|
|
five_cycle(v, maj, 0x8f1bbcdc, 40);
|
|
five_cycle(v, maj, 0x8f1bbcdc, 45);
|
|
five_cycle(v, maj, 0x8f1bbcdc, 50);
|
|
five_cycle(v, maj, 0x8f1bbcdc, 55);
|
|
|
|
five_cycle(v, parity, 0xca62c1d6, 60);
|
|
five_cycle(v, parity, 0xca62c1d6, 65);
|
|
five_cycle(v, parity, 0xca62c1d6, 70);
|
|
five_cycle(v, parity, 0xca62c1d6, 75);
|
|
|
|
#ifdef ARRAY
|
|
ctx->hash[0] += v[0]; ctx->hash[1] += v[1];
|
|
ctx->hash[2] += v[2]; ctx->hash[3] += v[3];
|
|
ctx->hash[4] += v[4];
|
|
#else
|
|
ctx->hash[0] += v0; ctx->hash[1] += v1;
|
|
ctx->hash[2] += v2; ctx->hash[3] += v3;
|
|
ctx->hash[4] += v4;
|
|
#endif
|
|
}
|
|
|
|
void sha1_begin(sha1_ctx ctx[1])
|
|
{
|
|
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;
|
|
}
|
|
|
|
/* SHA1 hash data in an array of bytes into hash buffer and */
|
|
/* call the hash_compile function as required. */
|
|
|
|
void sha1_hash(const unsigned char data[], unsigned long len, sha1_ctx ctx[1])
|
|
{ uint32_t pos = (uint32_t)(ctx->count[0] & SHA1_MASK),
|
|
space = SHA1_BLOCK_SIZE - pos;
|
|
const unsigned char *sp = data;
|
|
|
|
if((ctx->count[0] += len) < len)
|
|
++(ctx->count[1]);
|
|
|
|
while(len >= space) /* tranfer whole blocks if possible */
|
|
{
|
|
memcpy(((unsigned char*)ctx->wbuf) + pos, sp, space);
|
|
sp += space; len -= space; space = SHA1_BLOCK_SIZE; pos = 0;
|
|
bsw_32(ctx->wbuf, SHA1_BLOCK_SIZE >> 2);
|
|
sha1_compile(ctx);
|
|
}
|
|
|
|
memcpy(((unsigned char*)ctx->wbuf) + pos, sp, len);
|
|
}
|
|
|
|
/* SHA1 final padding and digest calculation */
|
|
|
|
void sha1_end(unsigned char hval[], sha1_ctx ctx[1])
|
|
{ uint32_t i = (uint32_t)(ctx->count[0] & SHA1_MASK);
|
|
|
|
/* put bytes in the buffer in an order in which references to */
|
|
/* 32-bit words will put bytes with lower addresses into the */
|
|
/* top of 32 bit words on BOTH big and little endian machines */
|
|
bsw_32(ctx->wbuf, (i + 3) >> 2);
|
|
|
|
/* we now need to mask valid bytes and add the padding which is */
|
|
/* a single 1 bit and as many zero bits as necessary. Note that */
|
|
/* we can always add the first padding byte here because the */
|
|
/* buffer always has at least one empty slot */
|
|
ctx->wbuf[i >> 2] &= 0xffffff80 << 8 * (~i & 3);
|
|
ctx->wbuf[i >> 2] |= 0x00000080 << 8 * (~i & 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(i > SHA1_BLOCK_SIZE - 9)
|
|
{
|
|
if(i < 60) ctx->wbuf[15] = 0;
|
|
sha1_compile(ctx);
|
|
i = 0;
|
|
}
|
|
else /* compute a word index for the empty buffer positions */
|
|
i = (i >> 2) + 1;
|
|
|
|
while(i < 14) /* and zero pad all but last two positions */
|
|
ctx->wbuf[i++] = 0;
|
|
|
|
/* the following 32-bit length fields are assembled in the */
|
|
/* wrong byte order on little endian machines but this is */
|
|
/* corrected later since they are only ever used as 32-bit */
|
|
/* word values. */
|
|
ctx->wbuf[14] = (ctx->count[1] << 3) | (ctx->count[0] >> 29);
|
|
ctx->wbuf[15] = 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)));
|
|
}
|
|
|
|
void sha1(unsigned char hval[], const unsigned char data[], unsigned long len)
|
|
{ sha1_ctx cx[1];
|
|
|
|
sha1_begin(cx); sha1_hash(data, len, cx); sha1_end(hval, cx);
|
|
}
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|