rendered paste body/* * Cryptographic API. * * SHA-256, as specified in * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf * * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>. * * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> * * Ported from the Linux kernel to Apt by Anthony Towns <ajt@debian.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * */#define SHA256_DIGEST_SIZE 32#define SHA256_HMAC_BLOCK_SIZE 64#define ror32(value,bits) (((value) >> (bits)) | ((value) << (32 - (bits))))#include <apt-pkg/sha256.h>#include <apt-pkg/strutl.h>#include <string.h>#include <unistd.h>#include <stdint.h>#include <stdlib.h>#include <stdio.h>#include <arpa/inet.h>typedef uint32_t u32;typedef uint8_t u8;static inline u32 Ch(u32 x, u32 y, u32 z){ return z ^ (x & (y ^ z));}static inline u32 Maj(u32 x, u32 y, u32 z){ return (x & y) | (z & (x | y));}#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))#define H0 0x6a09e667#define H1 0xbb67ae85#define H2 0x3c6ef372#define H3 0xa54ff53a#define H4 0x510e527f#define H5 0x9b05688c#define H6 0x1f83d9ab#define H7 0x5be0cd19static inline void LOAD_OP(int I, u32 *W, const u8 *input){ W[I] = ( ((u32) input[I * 4 + 0] << 24) | ((u32) input[I * 4 + 1] << 16) | ((u32) input[I * 4 + 2] << 8) | ((u32) input[I * 4 + 3]));}static inline void BLEND_OP(int I, u32 *W){ W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];}static void sha256_transform(u32 *state, const u8 *input){ u32 a, b, c, d, e, f, g, h, t1, t2; u32 W[64]; int i; /* load the input */ for (i = 0; i < 16; i++) LOAD_OP(i, W, input); /* now blend */ for (i = 16; i < 64; i++) BLEND_OP(i, W); /* load the state into our registers */ a=state[0]; b=state[1]; c=state[2]; d=state[3]; e=state[4]; f=state[5]; g=state[6]; h=state[7]; /* now iterate */ t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56]; t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57]; t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58]; t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59]; t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60]; t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61]; t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62]; t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63]; t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e; state[5] += f; state[6] += g; state[7] += h; /* clear any sensitive info... */ a = b = c = d = e = f = g = h = t1 = t2 = 0; memset(W, 0, 64 * sizeof(u32));}SHA256Summation::SHA256Summation(){ Sum.state[0] = H0; Sum.state[1] = H1; Sum.state[2] = H2; Sum.state[3] = H3; Sum.state[4] = H4; Sum.state[5] = H5; Sum.state[6] = H6; Sum.state[7] = H7; Sum.count[0] = Sum.count[1] = 0; memset(Sum.buf, 0, sizeof(Sum.buf)); Done = false;}bool SHA256Summation::Add(const u8 *data, unsigned long len){ struct sha256_ctx *sctx = ∑ unsigned int i, index, part_len; if (Done) return false; /* Compute number of bytes mod 128 */ index = (unsigned int)((sctx->count[0] >> 3) & 0x3f); /* Update number of bits */ if ((sctx->count[0] += (len << 3)) < (len << 3)) { sctx->count[1]++; sctx->count[1] += (len >> 29); } part_len = 64 - index; /* Transform as many times as possible. */ if (len >= part_len) { memcpy(&sctx->buf[index], data, part_len); sha256_transform(sctx->state, sctx->buf); for (i = part_len; i + 63 < len; i += 64) sha256_transform(sctx->state, &data[i]); index = 0; } else { i = 0; } /* Buffer remaining input */ memcpy(&sctx->buf[index], &data[i], len-i); return true;}SHA256SumValue SHA256Summation::Result(){ struct sha256_ctx *sctx = ∑ if (!Done) { u8 bits[8]; unsigned int index, pad_len, t; static const u8 padding[64] = { 0x80, }; /* Save number of bits */ t = sctx->count[0]; bits[7] = t; t >>= 8; bits[6] = t; t >>= 8; bits[5] = t; t >>= 8; bits[4] = t; t = sctx->count[1]; bits[3] = t; t >>= 8; bits[2] = t; t >>= 8; bits[1] = t; t >>= 8; bits[0] = t; /* Pad out to 56 mod 64. */ index = (sctx->count[0] >> 3) & 0x3f; pad_len = (index < 56) ? (56 - index) : ((64+56) - index); Add(padding, pad_len); /* Append length (before padding) */ Add(bits, 8); } Done = true; /* Store state in digest */ SHA256SumValue res; u8 *out = res.Sum; int i, j; unsigned int t; for (i = j = 0; i < 8; i++, j += 4) { t = sctx->state[i]; out[j+3] = t; t >>= 8; out[j+2] = t; t >>= 8; out[j+1] = t; t >>= 8; out[j ] = t; } return res;}// SHA256SumValue::SHA256SumValue - Constructs the sum from a string /*{{{*/// ---------------------------------------------------------------------/* The string form of a SHA256 is a 64 character hex number */SHA256SumValue::SHA256SumValue(string Str){ memset(Sum,0,sizeof(Sum)); Set(Str);} /*}}}*/// SHA256SumValue::SHA256SumValue - Default constructor /*{{{*/// ---------------------------------------------------------------------/* Sets the value to 0 */SHA256SumValue::SHA256SumValue(){ memset(Sum,0,sizeof(Sum));} /*}}}*/// SHA256SumValue::Set - Set the sum from a string /*{{{*/// ---------------------------------------------------------------------/* Converts the hex string into a set of chars */bool SHA256SumValue::Set(string Str){ return Hex2Num(Str,Sum,sizeof(Sum));} /*}}}*/// SHA256SumValue::Value - Convert the number into a string /*{{{*/// ---------------------------------------------------------------------/* Converts the set of chars into a hex string in lower case */string SHA256SumValue::Value() const{ char Conv[16] = { '0','1','2','3','4','5','6','7','8','9','a','b', 'c','d','e','f' }; char Result[65]; Result[64] = 0; // Convert each char into two letters int J = 0; int I = 0; for (; I != 64; J++,I += 2) { Result[I] = Conv[Sum[J] >> 4]; Result[I + 1] = Conv[Sum[J] & 0xF]; } return string(Result);}// SHA256SumValue::operator == - Comparator /*{{{*/// ---------------------------------------------------------------------/* Call memcmp on the buffer */bool SHA256SumValue::operator == (const SHA256SumValue & rhs) const{ return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0;} /*}}}*/// SHA256Summation::AddFD - Add content of file into the checksum /*{{{*/// ---------------------------------------------------------------------/* */bool SHA256Summation::AddFD(int Fd,unsigned long Size){ unsigned char Buf[64 * 64]; int Res = 0; int ToEOF = (Size == 0); while (Size != 0 || ToEOF) { unsigned n = sizeof(Buf); if (!ToEOF) n = min(Size,(unsigned long)n); Res = read(Fd,Buf,n); if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read return false; if (ToEOF && Res == 0) // EOF break; Size -= Res; Add(Buf,Res); } return true;} /*}}}*/