1d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* $OpenBSD: sha1.c,v 1.26 2015/09/11 09:18:27 guenther Exp $ */ 2d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 3d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 4d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * SHA-1 in C 5d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * By Steve Reid <steve@edmweb.com> 6d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * 100% Public Domain 7d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * 8d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * Test Vectors (from FIPS PUB 180-1) 9d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * "abc" 10d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D 11d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" 12d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1 13d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * A million repetitions of "a" 14d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F 15d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 16d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 17d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#include <stdint.h> 18d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#include <string.h> 19d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#include "sha1.h" 20d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 21d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 22d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 23d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 24d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * blk0() and blk() perform the initial expand. 25d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * I got the idea of expanding during the round function from SSLeay 26d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 27d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#if BYTE_ORDER == LITTLE_ENDIAN 28d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov# define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \ 29d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov |(rol(block->l[i],8)&0x00FF00FF)) 30d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#else 31d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov# define blk0(i) block->l[i] 32d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#endif 33d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ 34d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov ^block->l[(i+2)&15]^block->l[i&15],1)) 35d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 36d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 37d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1 38d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 39d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30); 40d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); 41d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); 42d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); 43d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); 44d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 45d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikovtypedef union { 46d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint8_t c[64]; 47d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint32_t l[16]; 48d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov} CHAR64LONG16; 49d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 50d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 51d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * Hash a single 512-bit block. This is the core of the algorithm. 52d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 53d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikovvoid 54d1efa09d342bff3e5def2978a0bef748d74f9c82Emil VelikovSHA1Transform(uint32_t state[5], const uint8_t buffer[SHA1_BLOCK_LENGTH]) 55d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov{ 56d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint32_t a, b, c, d, e; 57d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint8_t workspace[SHA1_BLOCK_LENGTH]; 58d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov CHAR64LONG16 *block = (CHAR64LONG16 *)workspace; 59d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 60d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov (void)memcpy(block, buffer, SHA1_BLOCK_LENGTH); 61d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 62d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov /* Copy context->state[] to working vars */ 63d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov a = state[0]; 64d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov b = state[1]; 65d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov c = state[2]; 66d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov d = state[3]; 67d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov e = state[4]; 68d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 69d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov /* 4 rounds of 20 operations each. Loop unrolled. */ 70d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 71d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 72d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 73d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 74d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 75d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 76d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 77d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 78d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 79d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 80d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 81d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 82d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 83d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 84d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 85d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 86d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 87d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 88d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 89d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 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); 90d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 91d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov /* Add the working vars back into context.state[] */ 92d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov state[0] += a; 93d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov state[1] += b; 94d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov state[2] += c; 95d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov state[3] += d; 96d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov state[4] += e; 97d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 98d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov /* Wipe variables */ 99d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov a = b = c = d = e = 0; 100d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov} 101d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 102d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 103d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 104d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * SHA1Init - Initialize new context 105d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 106d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikovvoid 107d1efa09d342bff3e5def2978a0bef748d74f9c82Emil VelikovSHA1Init(SHA1_CTX *context) 108d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov{ 109d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 110d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov /* SHA1 initialization constants */ 111d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->count = 0; 112d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->state[0] = 0x67452301; 113d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->state[1] = 0xEFCDAB89; 114d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->state[2] = 0x98BADCFE; 115d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->state[3] = 0x10325476; 116d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->state[4] = 0xC3D2E1F0; 117d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov} 118d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 119d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 120d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 121d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * Run your data through this. 122d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 123d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikovvoid 124d1efa09d342bff3e5def2978a0bef748d74f9c82Emil VelikovSHA1Update(SHA1_CTX *context, const uint8_t *data, size_t len) 125d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov{ 126d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov size_t i, j; 127d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 128d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov j = (size_t)((context->count >> 3) & 63); 129d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov context->count += (len << 3); 130d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov if ((j + len) > 63) { 131d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov (void)memcpy(&context->buffer[j], data, (i = 64-j)); 132d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov SHA1Transform(context->state, context->buffer); 133d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov for ( ; i + 63 < len; i += 64) 134d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov SHA1Transform(context->state, (uint8_t *)&data[i]); 135d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov j = 0; 136d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov } else { 137d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov i = 0; 138d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov } 139d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov (void)memcpy(&context->buffer[j], &data[i], len - i); 140d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov} 141d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 142d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 143d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov/* 144d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov * Add padding and return the message digest. 145d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov */ 146d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikovvoid 147d1efa09d342bff3e5def2978a0bef748d74f9c82Emil VelikovSHA1Pad(SHA1_CTX *context) 148d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov{ 149d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint8_t finalcount[8]; 150d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint32_t i; 151d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 152d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov for (i = 0; i < 8; i++) { 153d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov finalcount[i] = (uint8_t)((context->count >> 154d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov ((7 - (i & 7)) * 8)) & 255); /* Endian independent */ 155d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov } 156d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov SHA1Update(context, (uint8_t *)"\200", 1); 157d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov while ((context->count & 504) != 448) 158d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov SHA1Update(context, (uint8_t *)"\0", 1); 159d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */ 160d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov} 161d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 162d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikovvoid 163d1efa09d342bff3e5def2978a0bef748d74f9c82Emil VelikovSHA1Final(uint8_t digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context) 164d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov{ 165d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov uint32_t i; 166d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov 167d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov SHA1Pad(context); 168d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov for (i = 0; i < SHA1_DIGEST_LENGTH; i++) { 169d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov digest[i] = (uint8_t) 170d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); 171d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov } 172d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov memset(context, 0, sizeof(*context)); 173d1efa09d342bff3e5def2978a0bef748d74f9c82Emil Velikov} 174