1285031Sdes/* $OpenBSD: sha1.c,v 1.23 2014/01/08 06:14:57 tedu Exp $ */ 2285031Sdes 3285031Sdes/* 4285031Sdes * SHA-1 in C 5285031Sdes * By Steve Reid <steve@edmweb.com> 6285031Sdes * 100% Public Domain 7285031Sdes * 8285031Sdes * Test Vectors (from FIPS PUB 180-1) 9285031Sdes * "abc" 10285031Sdes * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D 11285031Sdes * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" 12285031Sdes * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1 13285031Sdes * A million repetitions of "a" 14285031Sdes * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F 15285031Sdes */ 16285031Sdes 17285031Sdes#include "includes.h" 18285031Sdes 19285031Sdes#ifndef WITH_OPENSSL 20285031Sdes 21285031Sdes#include <sys/param.h> 22285031Sdes#include <string.h> 23285031Sdes 24285031Sdes#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 25285031Sdes 26285031Sdes/* 27285031Sdes * blk0() and blk() perform the initial expand. 28285031Sdes * I got the idea of expanding during the round function from SSLeay 29285031Sdes */ 30285031Sdes#if BYTE_ORDER == LITTLE_ENDIAN 31285031Sdes# define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \ 32285031Sdes |(rol(block->l[i],8)&0x00FF00FF)) 33285031Sdes#else 34285031Sdes# define blk0(i) block->l[i] 35285031Sdes#endif 36285031Sdes#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ 37285031Sdes ^block->l[(i+2)&15]^block->l[i&15],1)) 38285031Sdes 39285031Sdes/* 40285031Sdes * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1 41285031Sdes */ 42285031Sdes#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30); 43285031Sdes#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); 44285031Sdes#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); 45285031Sdes#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); 46285031Sdes#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); 47285031Sdes 48285031Sdestypedef union { 49285031Sdes u_int8_t c[64]; 50285031Sdes u_int32_t l[16]; 51285031Sdes} CHAR64LONG16; 52285031Sdes 53285031Sdes/* 54285031Sdes * Hash a single 512-bit block. This is the core of the algorithm. 55285031Sdes */ 56285031Sdesvoid 57285031SdesSHA1Transform(u_int32_t state[5], const u_int8_t buffer[SHA1_BLOCK_LENGTH]) 58285031Sdes{ 59285031Sdes u_int32_t a, b, c, d, e; 60285031Sdes u_int8_t workspace[SHA1_BLOCK_LENGTH]; 61285031Sdes CHAR64LONG16 *block = (CHAR64LONG16 *)workspace; 62285031Sdes 63285031Sdes (void)memcpy(block, buffer, SHA1_BLOCK_LENGTH); 64285031Sdes 65285031Sdes /* Copy context->state[] to working vars */ 66285031Sdes a = state[0]; 67285031Sdes b = state[1]; 68285031Sdes c = state[2]; 69285031Sdes d = state[3]; 70285031Sdes e = state[4]; 71285031Sdes 72285031Sdes /* 4 rounds of 20 operations each. Loop unrolled. */ 73285031Sdes 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); 74285031Sdes 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); 75285031Sdes 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); 76285031Sdes 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); 77285031Sdes 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); 78285031Sdes 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); 79285031Sdes 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); 80285031Sdes 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); 81285031Sdes 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); 82285031Sdes 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); 83285031Sdes 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); 84285031Sdes 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); 85285031Sdes 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); 86285031Sdes 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); 87285031Sdes 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); 88285031Sdes 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); 89285031Sdes 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); 90285031Sdes 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); 91285031Sdes 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); 92285031Sdes 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); 93285031Sdes 94285031Sdes /* Add the working vars back into context.state[] */ 95285031Sdes state[0] += a; 96285031Sdes state[1] += b; 97285031Sdes state[2] += c; 98285031Sdes state[3] += d; 99285031Sdes state[4] += e; 100285031Sdes 101285031Sdes /* Wipe variables */ 102285031Sdes a = b = c = d = e = 0; 103285031Sdes} 104285031Sdes 105285031Sdes 106285031Sdes/* 107285031Sdes * SHA1Init - Initialize new context 108285031Sdes */ 109285031Sdesvoid 110285031SdesSHA1Init(SHA1_CTX *context) 111285031Sdes{ 112285031Sdes 113285031Sdes /* SHA1 initialization constants */ 114285031Sdes context->count = 0; 115285031Sdes context->state[0] = 0x67452301; 116285031Sdes context->state[1] = 0xEFCDAB89; 117285031Sdes context->state[2] = 0x98BADCFE; 118285031Sdes context->state[3] = 0x10325476; 119285031Sdes context->state[4] = 0xC3D2E1F0; 120285031Sdes} 121285031Sdes 122285031Sdes 123285031Sdes/* 124285031Sdes * Run your data through this. 125285031Sdes */ 126285031Sdesvoid 127285031SdesSHA1Update(SHA1_CTX *context, const u_int8_t *data, size_t len) 128285031Sdes{ 129285031Sdes size_t i, j; 130285031Sdes 131285031Sdes j = (size_t)((context->count >> 3) & 63); 132285031Sdes context->count += (len << 3); 133285031Sdes if ((j + len) > 63) { 134285031Sdes (void)memcpy(&context->buffer[j], data, (i = 64-j)); 135285031Sdes SHA1Transform(context->state, context->buffer); 136285031Sdes for ( ; i + 63 < len; i += 64) 137285031Sdes SHA1Transform(context->state, (u_int8_t *)&data[i]); 138285031Sdes j = 0; 139285031Sdes } else { 140285031Sdes i = 0; 141285031Sdes } 142285031Sdes (void)memcpy(&context->buffer[j], &data[i], len - i); 143285031Sdes} 144285031Sdes 145285031Sdes 146285031Sdes/* 147285031Sdes * Add padding and return the message digest. 148285031Sdes */ 149285031Sdesvoid 150285031SdesSHA1Pad(SHA1_CTX *context) 151285031Sdes{ 152285031Sdes u_int8_t finalcount[8]; 153285031Sdes u_int i; 154285031Sdes 155285031Sdes for (i = 0; i < 8; i++) { 156285031Sdes finalcount[i] = (u_int8_t)((context->count >> 157285031Sdes ((7 - (i & 7)) * 8)) & 255); /* Endian independent */ 158285031Sdes } 159285031Sdes SHA1Update(context, (u_int8_t *)"\200", 1); 160285031Sdes while ((context->count & 504) != 448) 161285031Sdes SHA1Update(context, (u_int8_t *)"\0", 1); 162285031Sdes SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */ 163285031Sdes} 164285031Sdes 165285031Sdesvoid 166285031SdesSHA1Final(u_int8_t digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context) 167285031Sdes{ 168285031Sdes u_int i; 169285031Sdes 170285031Sdes SHA1Pad(context); 171285031Sdes for (i = 0; i < SHA1_DIGEST_LENGTH; i++) { 172285031Sdes digest[i] = (u_int8_t) 173285031Sdes ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); 174285031Sdes } 175285031Sdes memset(context, 0, sizeof(*context)); 176285031Sdes} 177285031Sdes#endif /* !WITH_OPENSSL */ 178