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219 lines
7.2 KiB
C
219 lines
7.2 KiB
C
/**
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* MojoSetup; a portable, flexible installation application.
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*
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* Please see the file LICENSE.txt in the source's root directory.
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*
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* This file written by Ryan C. Gordon.
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*/
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#include "universal.h"
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#if SUPPORT_SHA1
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// SHA-1 code originally from ftp://ftp.funet.fi/pub/crypt/hash/sha/sha1.c
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// License: public domain.
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// I cleaned it up a little for MojoSetup's specific purposes. --ryan.
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/*
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SHA-1 in C
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By Steve Reid <steve@edmweb.com>
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100% Public Domain
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Test Vectors (from FIPS PUB 180-1)
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"abc"
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A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
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84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
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A million repetitions of "a"
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34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
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*/
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#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
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/* blk0() and blk() perform the initial expand. */
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/* I got the idea of expanding during the round function from SSLeay */
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#if PLATFORM_LITTLEENDIAN
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#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
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|(rol(block->l[i],8)&0x00FF00FF))
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#else
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#define blk0(i) block->l[i]
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#endif
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#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
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^block->l[(i+2)&15]^block->l[i&15],1))
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/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
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#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
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#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
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#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
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#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
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/* Hash a single 512-bit block. This is the core of the algorithm. */
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static void MojoSha1_transform(uint32 state[5], const uint8 buffer[64])
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{
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uint32 a, b, c, d, e;
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typedef union {
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uint8 c[64];
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uint32 l[16];
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} CHAR64LONG16;
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CHAR64LONG16* block;
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static uint8 workspace[64];
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block = (CHAR64LONG16*)workspace;
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memcpy(block, buffer, 64);
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/* Copy context->state[] to working vars */
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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/* 4 rounds of 20 operations each. Loop unrolled. */
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R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
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R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
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R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
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R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
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R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
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R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
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R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
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R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
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R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
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R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
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R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
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R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
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R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
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R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
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R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
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R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
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R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
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R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
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R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
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R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
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/* Add the working vars back into context.state[] */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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/* Wipe variables */
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a = b = c = d = e = 0;
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}
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/* MojoSha1_init - Initialize new context */
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void MojoSha1_init(MojoSha1 *context)
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{
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/* SHA1 initialization constants */
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context->state[0] = 0x67452301;
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context->state[1] = 0xEFCDAB89;
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context->state[2] = 0x98BADCFE;
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context->state[3] = 0x10325476;
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context->state[4] = 0xC3D2E1F0;
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context->count[0] = context->count[1] = 0;
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}
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/* Run your data through this. */
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void MojoSha1_append(MojoSha1 *context, const uint8 *data, uint32 len)
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{
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uint32 i, j;
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j = (context->count[0] >> 3) & 63;
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if ((context->count[0] += len << 3) < (len << 3)) context->count[1]++;
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context->count[1] += (len >> 29);
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if ((j + len) > 63) {
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memcpy(&context->buffer[j], data, (i = 64-j));
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MojoSha1_transform(context->state, context->buffer);
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for ( ; i + 63 < len; i += 64) {
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MojoSha1_transform(context->state, &data[i]);
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}
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j = 0;
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}
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else i = 0;
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memcpy(&context->buffer[j], &data[i], len - i);
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}
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/* Add padding and return the message digest. */
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void MojoSha1_finish(MojoSha1 *context, uint8 digest[20])
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{
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uint32 i, j;
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uint8 finalcount[8];
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for (i = 0; i < 8; i++) {
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finalcount[i] = (uint8)((context->count[(i >= 4 ? 0 : 1)]
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>> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */
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}
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MojoSha1_append(context, (uint8 *)"\200", 1);
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while ((context->count[0] & 504) != 448) {
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MojoSha1_append(context, (uint8 *)"\0", 1);
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}
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MojoSha1_append(context, finalcount, 8); /* Should cause a MojoSha1_transform() */
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for (i = 0; i < 20; i++) {
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digest[i] = (uint8)
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((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
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}
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/* Wipe variables */
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i = j = 0;
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memset(context->buffer, 0, 64);
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memset(context->state, 0, 20);
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memset(context->count, 0, 8);
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memset(&finalcount, 0, 8);
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MojoSha1_transform(context->state, context->buffer);
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}
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#endif // SUPPORT_SHA1
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#if TEST_SHA1
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int main(int argc, char **argv)
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{
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int i = 0;
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for (i = 1; i < argc; i++)
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{
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FILE *in = NULL;
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MojoSha1 ctx;
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MojoSha1_init(&ctx);
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in = fopen(argv[i], "rb");
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if (!in)
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perror("fopen");
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else
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{
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uint8 dig[20];
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int err = 0;
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while ( (!err) && (!feof(in)) )
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{
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uint8 buf[1024];
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size_t rc = fread(buf, 1, sizeof (buf), in);
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if (rc > 0)
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MojoSha1_append(&ctx, buf, rc);
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err = ferror(in);
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} // while
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if (err)
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perror("fread");
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fclose(in);
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MojoSha1_finish(&ctx, dig);
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if (!err)
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{
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printf("%s: %x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x\n",
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argv[i],
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(int) dig[0], (int) dig[1], (int) dig[2], (int) dig[3],
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(int) dig[4], (int) dig[5], (int) dig[6], (int) dig[7],
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(int) dig[8], (int) dig[9], (int) dig[10], (int) dig[11],
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(int) dig[12], (int) dig[13], (int) dig[14], (int) dig[15],
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(int) dig[16], (int) dig[17], (int) dig[18], (int) dig[19]);
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} // if
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} // else
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} // for
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return 0;
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} // main
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#endif
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// end of checksum_sha1.c ...
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