1238104Sdes/* 2238104Sdes * modified for ldns by Jelte Jansen, original taken from OpenBSD: 3238104Sdes * 4238104Sdes * SHA-1 in C 5238104Sdes * By Steve Reid <steve@edmweb.com> 6238104Sdes * 100% Public Domain 7238104Sdes * 8238104Sdes * Test Vectors (from FIPS PUB 180-1) 9238104Sdes * "abc" 10238104Sdes * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D 11238104Sdes * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" 12238104Sdes * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1 13238104Sdes * A million repetitions of "a" 14238104Sdes * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F 15238104Sdes*/ 16238104Sdes 17238104Sdes/* #define LITTLE_ENDIAN * This should be #define'd already, if true. */ 18238104Sdes 19238104Sdes#include <ldns/config.h> 20238104Sdes#include <ldns/ldns.h> 21238104Sdes#include <strings.h> 22238104Sdes 23266114Sdes#define SHA1HANDSOFF 1 /* Copies data before messing with it. */ 24238104Sdes#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 25238104Sdes 26238104Sdes/* blk0() and blk() perform the initial expand. */ 27238104Sdes/* I got the idea of expanding during the round function from SSLeay */ 28238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 29238104Sdes#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \ 30238104Sdes |(rol(block->l[i],8)&0x00FF00FF)) 31238104Sdes#else 32238104Sdes#define blk0(i) block->l[i] 33238104Sdes#endif 34238104Sdes#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ 35238104Sdes ^block->l[(i+2)&15]^block->l[i&15],1)) 36238104Sdes 37238104Sdes/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */ 38238104Sdes#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30); 39238104Sdes#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); 40238104Sdes#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); 41238104Sdes#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); 42238104Sdes#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); 43238104Sdes 44238104Sdes/* Hash a single 512-bit block. This is the core of the algorithm. */ 45238104Sdes 46238104Sdesvoid 47238104Sdesldns_sha1_transform(uint32_t state[5], const unsigned char buffer[LDNS_SHA1_BLOCK_LENGTH]) 48238104Sdes{ 49238104Sdes uint32_t a, b, c, d, e; 50238104Sdes typedef union { 51238104Sdes unsigned char c[64]; 52238104Sdes unsigned int l[16]; 53238104Sdes } CHAR64LONG16; 54238104Sdes CHAR64LONG16* block; 55238104Sdes#ifdef SHA1HANDSOFF 56238104Sdes unsigned char workspace[LDNS_SHA1_BLOCK_LENGTH]; 57238104Sdes 58238104Sdes block = (CHAR64LONG16 *)workspace; 59238104Sdes memmove(block, buffer, LDNS_SHA1_BLOCK_LENGTH); 60238104Sdes#else 61238104Sdes block = (CHAR64LONG16 *)buffer; 62238104Sdes#endif 63238104Sdes /* Copy context->state[] to working vars */ 64238104Sdes a = state[0]; 65238104Sdes b = state[1]; 66238104Sdes c = state[2]; 67238104Sdes d = state[3]; 68238104Sdes e = state[4]; 69238104Sdes 70238104Sdes /* 4 rounds of 20 operations each. Loop unrolled. */ 71238104Sdes 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); 72238104Sdes 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); 73238104Sdes 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); 74238104Sdes 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); 75238104Sdes 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); 76238104Sdes 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); 77238104Sdes 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); 78238104Sdes 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); 79238104Sdes 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); 80238104Sdes 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); 81238104Sdes 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); 82238104Sdes 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); 83238104Sdes 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); 84238104Sdes 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); 85238104Sdes 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); 86238104Sdes 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); 87238104Sdes 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); 88238104Sdes 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); 89238104Sdes 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); 90238104Sdes 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); 91238104Sdes 92238104Sdes /* Add the working vars back into context.state[] */ 93238104Sdes state[0] += a; 94238104Sdes state[1] += b; 95238104Sdes state[2] += c; 96238104Sdes state[3] += d; 97238104Sdes state[4] += e; 98238104Sdes /* Wipe variables */ 99238104Sdes a = b = c = d = e = 0; 100238104Sdes} 101238104Sdes 102238104Sdes 103238104Sdes/* SHA1Init - Initialize new context */ 104238104Sdes 105238104Sdesvoid 106238104Sdesldns_sha1_init(ldns_sha1_ctx *context) 107238104Sdes{ 108238104Sdes /* SHA1 initialization constants */ 109238104Sdes context->count = 0; 110238104Sdes context->state[0] = 0x67452301; 111238104Sdes context->state[1] = 0xEFCDAB89; 112238104Sdes context->state[2] = 0x98BADCFE; 113238104Sdes context->state[3] = 0x10325476; 114238104Sdes context->state[4] = 0xC3D2E1F0; 115238104Sdes} 116238104Sdes 117238104Sdes 118238104Sdes/* Run your data through this. */ 119238104Sdes 120238104Sdesvoid 121238104Sdesldns_sha1_update(ldns_sha1_ctx *context, const unsigned char *data, unsigned int len) 122238104Sdes{ 123238104Sdes unsigned int i; 124238104Sdes unsigned int j; 125238104Sdes 126238104Sdes j = (unsigned)(uint32_t)((context->count >> 3) & 63); 127238104Sdes context->count += (len << 3); 128238104Sdes if ((j + len) > 63) { 129238104Sdes memmove(&context->buffer[j], data, (i = 64 - j)); 130238104Sdes ldns_sha1_transform(context->state, context->buffer); 131238104Sdes for ( ; i + 63 < len; i += 64) { 132238104Sdes ldns_sha1_transform(context->state, &data[i]); 133238104Sdes } 134238104Sdes j = 0; 135238104Sdes } 136238104Sdes else i = 0; 137238104Sdes memmove(&context->buffer[j], &data[i], len - i); 138238104Sdes} 139238104Sdes 140238104Sdes 141238104Sdes/* Add padding and return the message digest. */ 142238104Sdes 143238104Sdesvoid 144238104Sdesldns_sha1_final(unsigned char digest[LDNS_SHA1_DIGEST_LENGTH], ldns_sha1_ctx *context) 145238104Sdes{ 146238104Sdes unsigned int i; 147238104Sdes unsigned char finalcount[8]; 148238104Sdes 149238104Sdes for (i = 0; i < 8; i++) { 150238104Sdes finalcount[i] = (unsigned char)((context->count >> 151238104Sdes ((7 - (i & 7)) * 8)) & 255); /* Endian independent */ 152238104Sdes } 153238104Sdes ldns_sha1_update(context, (unsigned char *)"\200", 1); 154238104Sdes while ((context->count & 504) != 448) { 155238104Sdes ldns_sha1_update(context, (unsigned char *)"\0", 1); 156238104Sdes } 157238104Sdes ldns_sha1_update(context, finalcount, 8); /* Should cause a SHA1Transform() */ 158238104Sdes 159238104Sdes if (digest != NULL) 160238104Sdes for (i = 0; i < LDNS_SHA1_DIGEST_LENGTH; i++) { 161238104Sdes digest[i] = (unsigned char)((context->state[i >> 2] >> 162238104Sdes ((3 - (i & 3)) * 8)) & 255); 163238104Sdes } 164238104Sdes#ifdef SHA1HANDSOFF /* make SHA1Transform overwrite its own static vars */ 165238104Sdes ldns_sha1_transform(context->state, context->buffer); 166238104Sdes#endif 167238104Sdes} 168238104Sdes 169238104Sdesunsigned char * 170238104Sdesldns_sha1(unsigned char *data, unsigned int data_len, unsigned char *digest) 171238104Sdes{ 172238104Sdes ldns_sha1_ctx ctx; 173238104Sdes ldns_sha1_init(&ctx); 174238104Sdes ldns_sha1_update(&ctx, data, data_len); 175238104Sdes ldns_sha1_final(digest, &ctx); 176238104Sdes return digest; 177238104Sdes} 178