1c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 2c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// LibSha1 3c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// 4c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Implementation of SHA1 hash function. 5c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Original author: Steve Reid <sreid@sea-to-sky.net> 6c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Contributions by: James H. Brown <jbrown@burgoyne.com>, Saul Kravitz <Saul.Kravitz@celera.com>, 7c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// and Ralph Giles <giles@ghostscript.com> 8c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Modified by WaterJuice retaining Public Domain license. 9c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// 10c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// This is free and unencumbered software released into the public domain - June 2013 waterjuice.org 11502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// Modified to: 12502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// - stop symbols being exported for libselinux shared library - October 2015 13c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Richard Haines <richard_c_haines@btinternet.com> 14502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// - Not cast the workspace from a byte array to a CHAR64LONG16 due to allignment isses. 15502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// Fixes: 16502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// sha1.c:73:33: error: cast from 'uint8_t *' (aka 'unsigned char *') to 'CHAR64LONG16 *' increases required alignment from 1 to 4 [-Werror,-Wcast-align] 17502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// CHAR64LONG16* block = (CHAR64LONG16*) workspace; 18502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts// William Roberts <william.c.roberts@intel.com> 19c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 20c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 21c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 22c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// IMPORTS 23c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 24c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 25c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#include "sha1.h" 26c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#include "dso.h" 27c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#include <memory.h> 28c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 29c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 30c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// TYPES 31c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 32c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 33c1db824828d45eb475220c26226b1cc58cd77f23Richard Hainestypedef union 34c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines{ 35c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint8_t c [64]; 36c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t l [16]; 37c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines} CHAR64LONG16; 38c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 39c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 40c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// INTERNAL FUNCTIONS 41c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 42c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 43c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 44c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 45c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// blk0() and blk() perform the initial expand. 46c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \ 47c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines |(rol(block->l[i],8)&0x00FF00FF)) 48c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 49c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ 50c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ^block->l[(i+2)&15]^block->l[i&15],1)) 51c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 52c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// (R0+R1), R2, R3, R4 are the different operations used in SHA1 53c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define R0(v,w,x,y,z,i) z += ((w&(x^y))^y) + blk0(i)+ 0x5A827999 + rol(v,5); w=rol(w,30); 54c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define R1(v,w,x,y,z,i) z += ((w&(x^y))^y) + blk(i) + 0x5A827999 + rol(v,5); w=rol(w,30); 55c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define R2(v,w,x,y,z,i) z += (w^x^y) + blk(i) + 0x6ED9EBA1 + rol(v,5); w=rol(w,30); 56c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define R3(v,w,x,y,z,i) z += (((w|x)&y)|(w&x)) + blk(i) + 0x8F1BBCDC + rol(v,5); w=rol(w,30); 57c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines#define R4(v,w,x,y,z,i) z += (w^x^y) + blk(i) + 0xCA62C1D6 + rol(v,5); w=rol(w,30); 58c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 59c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 60c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 61c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// TransformFunction 62c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// 63c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Hash a single 512-bit block. This is the core of the algorithm 64c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 65c1db824828d45eb475220c26226b1cc58cd77f23Richard Hainesstatic 66c1db824828d45eb475220c26226b1cc58cd77f23Richard Hainesvoid 67c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines TransformFunction 68c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ( 69c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t state[5], 70c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines const uint8_t buffer[64] 71c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ) 72c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines{ 73c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t a; 74c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t b; 75c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t c; 76c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t d; 77c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t e; 78502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts CHAR64LONG16 workspace; 79502b48f4db8d753de5e0fe3e4592ea4fb1f872d1William Roberts CHAR64LONG16* block = &workspace; 80c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 81c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines memcpy( block, buffer, 64 ); 82c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 83c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines // Copy context->state[] to working vars 84c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines a = state[0]; 85c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines b = state[1]; 86c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines c = state[2]; 87c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines d = state[3]; 88c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines e = state[4]; 89c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 90c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines // 4 rounds of 20 operations each. Loop unrolled. 91c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 92c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 93c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 94c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 95c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 96c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 97c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 98c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 99c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 100c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 101c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 102c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 103c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 104c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 105c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 106c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 107c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 108c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 109c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 110c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 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); 111c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 112c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines // Add the working vars back into context.state[] 113c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines state[0] += a; 114c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines state[1] += b; 115c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines state[2] += c; 116c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines state[3] += d; 117c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines state[4] += e; 118c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines} 119c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 120c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 121c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// PUBLIC FUNCTIONS 122c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 123c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 124c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 125c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Sha1Initialise 126c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// 127c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Initialises an SHA1 Context. Use this to initialise/reset a context. 128c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 129c1db824828d45eb475220c26226b1cc58cd77f23Richard Hainesvoid hidden 130c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Initialise 131c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ( 132c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Context* Context 133c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ) 134c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines{ 135c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines // SHA1 initialization constants 136c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->State[0] = 0x67452301; 137c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->State[1] = 0xEFCDAB89; 138c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->State[2] = 0x98BADCFE; 139c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->State[3] = 0x10325476; 140c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->State[4] = 0xC3D2E1F0; 141c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->Count[0] = 0; 142c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->Count[1] = 0; 143c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines} 144c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 145c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 146c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Sha1Update 147c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// 148c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Adds data to the SHA1 context. This will process the data and update the internal state of the context. Keep on 149c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// calling this function until all the data has been added. Then call Sha1Finalise to calculate the hash. 150c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 151c1db824828d45eb475220c26226b1cc58cd77f23Richard Hainesvoid hidden 152c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Update 153c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ( 154c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Context* Context, 155c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines void* Buffer, 156c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t BufferSize 157c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ) 158c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines{ 159c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t i; 160c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t j; 161c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 162c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines j = (Context->Count[0] >> 3) & 63; 163c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines if( (Context->Count[0] += BufferSize << 3) < (BufferSize << 3) ) 164c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 165c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->Count[1]++; 166c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 167c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 168c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Context->Count[1] += (BufferSize >> 29); 169c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines if( (j + BufferSize) > 63 ) 170c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 171c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines i = 64 - j; 172c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines memcpy( &Context->Buffer[j], Buffer, i ); 173c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines TransformFunction(Context->State, Context->Buffer); 174c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines for( ; i + 63 < BufferSize; i += 64 ) 175c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 176c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines TransformFunction(Context->State, (uint8_t*)Buffer + i); 177c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 178c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines j = 0; 179c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 180c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines else 181c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 182c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines i = 0; 183c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 184c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 185c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines memcpy( &Context->Buffer[j], &((uint8_t*)Buffer)[i], BufferSize - i ); 186c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines} 187c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 188c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 189c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Sha1Finalise 190c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// 191c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// Performs the final calculation of the hash and returns the digest (20 byte buffer containing 160bit hash). After 192c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines// calling this, Sha1Initialised must be used to reuse the context. 193c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 194c1db824828d45eb475220c26226b1cc58cd77f23Richard Hainesvoid hidden 195c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Finalise 196c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ( 197c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Context* Context, 198c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines SHA1_HASH* Digest 199c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines ) 200c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines{ 201c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint32_t i; 202c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines uint8_t finalcount[8]; 203c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 204c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines for( i=0; i<8; i++ ) 205c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 206c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines finalcount[i] = (unsigned char)((Context->Count[(i >= 4 ? 0 : 1)] 207c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines >> ((3-(i & 3)) * 8) ) & 255); // Endian independent 208c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 209c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Update( Context, (uint8_t*)"\x80", 1 ); 210c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines while( (Context->Count[0] & 504) != 448 ) 211c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 212c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Update( Context, (uint8_t*)"\0", 1 ); 213c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 214c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines 215c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Sha1Update( Context, finalcount, 8 ); // Should cause a Sha1TransformFunction() 216c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines for( i=0; i<SHA1_HASH_SIZE; i++ ) 217c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines { 218c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines Digest->bytes[i] = (uint8_t)((Context->State[i>>2] >> ((3-(i & 3)) * 8) ) & 255); 219c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines } 220c1db824828d45eb475220c26226b1cc58cd77f23Richard Haines} 221