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annotate Modules/shamodule.c @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents 4d36e56b56d9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* SHA module */
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2
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3 /* This module provides an interface to NIST's Secure Hash Algorithm */
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4
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5 /* See below for information about the original code this module was
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6 based upon. Additional work performed by:
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7
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8 Andrew Kuchling (amk@amk.ca)
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9 Greg Stein (gstein@lyra.org)
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10
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11 Copyright (C) 2005 Gregory P. Smith (greg@krypto.org)
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12 Licensed to PSF under a Contributor Agreement.
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13
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14 */
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15
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16 /* SHA objects */
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17
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18 #include "Python.h"
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19 #include "structmember.h"
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20
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21
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22 /* Endianness testing and definitions */
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23 #define TestEndianness(variable) {int i=1; variable=PCT_BIG_ENDIAN;\
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24 if (*((char*)&i)==1) variable=PCT_LITTLE_ENDIAN;}
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25
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26 #define PCT_LITTLE_ENDIAN 1
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27 #define PCT_BIG_ENDIAN 0
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28
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29 /* Some useful types */
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30
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31 typedef unsigned char SHA_BYTE;
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32
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33 #if SIZEOF_INT == 4
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34 typedef unsigned int SHA_INT32; /* 32-bit integer */
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35 #else
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36 /* not defined. compilation will die. */
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37 #endif
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38
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39 /* The SHA block size and message digest sizes, in bytes */
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40
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41 #define SHA_BLOCKSIZE 64
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42 #define SHA_DIGESTSIZE 20
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43
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44 /* The structure for storing SHS info */
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45
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46 typedef struct {
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47 PyObject_HEAD
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48 SHA_INT32 digest[5]; /* Message digest */
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49 SHA_INT32 count_lo, count_hi; /* 64-bit bit count */
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50 SHA_BYTE data[SHA_BLOCKSIZE]; /* SHA data buffer */
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51 int Endianness;
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52 int local; /* unprocessed amount in data */
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53 } SHAobject;
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54
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55 /* When run on a little-endian CPU we need to perform byte reversal on an
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56 array of longwords. */
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57
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58 static void longReverse(SHA_INT32 *buffer, int byteCount, int Endianness)
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59 {
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60 SHA_INT32 value;
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61
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62 if ( Endianness == PCT_BIG_ENDIAN )
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63 return;
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64
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65 byteCount /= sizeof(*buffer);
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66 while (byteCount--) {
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67 value = *buffer;
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68 value = ( ( value & 0xFF00FF00L ) >> 8 ) | \
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69 ( ( value & 0x00FF00FFL ) << 8 );
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70 *buffer++ = ( value << 16 ) | ( value >> 16 );
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71 }
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72 }
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73
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74 static void SHAcopy(SHAobject *src, SHAobject *dest)
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75 {
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76 dest->Endianness = src->Endianness;
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77 dest->local = src->local;
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78 dest->count_lo = src->count_lo;
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79 dest->count_hi = src->count_hi;
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80 memcpy(dest->digest, src->digest, sizeof(src->digest));
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81 memcpy(dest->data, src->data, sizeof(src->data));
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82 }
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83
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84
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85 /* ------------------------------------------------------------------------
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86 *
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87 * This code for the SHA algorithm was noted as public domain. The original
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88 * headers are pasted below.
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89 *
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90 * Several changes have been made to make it more compatible with the
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91 * Python environment and desired interface.
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92 *
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93 */
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94
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95 /* NIST Secure Hash Algorithm */
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96 /* heavily modified by Uwe Hollerbach <uh@alumni.caltech edu> */
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97 /* from Peter C. Gutmann's implementation as found in */
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98 /* Applied Cryptography by Bruce Schneier */
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99 /* Further modifications to include the "UNRAVEL" stuff, below */
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100
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101 /* This code is in the public domain */
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102
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103 /* UNRAVEL should be fastest & biggest */
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104 /* UNROLL_LOOPS should be just as big, but slightly slower */
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105 /* both undefined should be smallest and slowest */
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106
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107 #define UNRAVEL
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108 /* #define UNROLL_LOOPS */
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109
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110 /* The SHA f()-functions. The f1 and f3 functions can be optimized to
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111 save one boolean operation each - thanks to Rich Schroeppel,
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112 rcs@cs.arizona.edu for discovering this */
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113
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114 /*#define f1(x,y,z) ((x & y) | (~x & z)) // Rounds 0-19 */
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115 #define f1(x,y,z) (z ^ (x & (y ^ z))) /* Rounds 0-19 */
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116 #define f2(x,y,z) (x ^ y ^ z) /* Rounds 20-39 */
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117 /*#define f3(x,y,z) ((x & y) | (x & z) | (y & z)) // Rounds 40-59 */
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118 #define f3(x,y,z) ((x & y) | (z & (x | y))) /* Rounds 40-59 */
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119 #define f4(x,y,z) (x ^ y ^ z) /* Rounds 60-79 */
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120
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121 /* SHA constants */
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122
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123 #define CONST1 0x5a827999L /* Rounds 0-19 */
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124 #define CONST2 0x6ed9eba1L /* Rounds 20-39 */
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125 #define CONST3 0x8f1bbcdcL /* Rounds 40-59 */
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126 #define CONST4 0xca62c1d6L /* Rounds 60-79 */
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127
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128 /* 32-bit rotate */
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129
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130 #define R32(x,n) ((x << n) | (x >> (32 - n)))
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131
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132 /* the generic case, for when the overall rotation is not unraveled */
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133
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134 #define FG(n) \
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135 T = R32(A,5) + f##n(B,C,D) + E + *WP++ + CONST##n; \
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136 E = D; D = C; C = R32(B,30); B = A; A = T
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137
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138 /* specific cases, for when the overall rotation is unraveled */
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139
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140 #define FA(n) \
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141 T = R32(A,5) + f##n(B,C,D) + E + *WP++ + CONST##n; B = R32(B,30)
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142
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143 #define FB(n) \
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144 E = R32(T,5) + f##n(A,B,C) + D + *WP++ + CONST##n; A = R32(A,30)
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145
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146 #define FC(n) \
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147 D = R32(E,5) + f##n(T,A,B) + C + *WP++ + CONST##n; T = R32(T,30)
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148
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149 #define FD(n) \
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150 C = R32(D,5) + f##n(E,T,A) + B + *WP++ + CONST##n; E = R32(E,30)
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151
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152 #define FE(n) \
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153 B = R32(C,5) + f##n(D,E,T) + A + *WP++ + CONST##n; D = R32(D,30)
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154
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155 #define FT(n) \
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156 A = R32(B,5) + f##n(C,D,E) + T + *WP++ + CONST##n; C = R32(C,30)
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157
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158 /* do SHA transformation */
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159
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160 static void
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161 sha_transform(SHAobject *sha_info)
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162 {
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163 int i;
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164 SHA_INT32 T, A, B, C, D, E, W[80], *WP;
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165
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166 memcpy(W, sha_info->data, sizeof(sha_info->data));
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167 longReverse(W, (int)sizeof(sha_info->data), sha_info->Endianness);
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168
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169 for (i = 16; i < 80; ++i) {
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170 W[i] = W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16];
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171
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172 /* extra rotation fix */
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173 W[i] = R32(W[i], 1);
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174 }
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175 A = sha_info->digest[0];
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176 B = sha_info->digest[1];
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177 C = sha_info->digest[2];
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178 D = sha_info->digest[3];
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179 E = sha_info->digest[4];
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180 WP = W;
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181 #ifdef UNRAVEL
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182 FA(1); FB(1); FC(1); FD(1); FE(1); FT(1); FA(1); FB(1); FC(1); FD(1);
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183 FE(1); FT(1); FA(1); FB(1); FC(1); FD(1); FE(1); FT(1); FA(1); FB(1);
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184 FC(2); FD(2); FE(2); FT(2); FA(2); FB(2); FC(2); FD(2); FE(2); FT(2);
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185 FA(2); FB(2); FC(2); FD(2); FE(2); FT(2); FA(2); FB(2); FC(2); FD(2);
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186 FE(3); FT(3); FA(3); FB(3); FC(3); FD(3); FE(3); FT(3); FA(3); FB(3);
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187 FC(3); FD(3); FE(3); FT(3); FA(3); FB(3); FC(3); FD(3); FE(3); FT(3);
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188 FA(4); FB(4); FC(4); FD(4); FE(4); FT(4); FA(4); FB(4); FC(4); FD(4);
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189 FE(4); FT(4); FA(4); FB(4); FC(4); FD(4); FE(4); FT(4); FA(4); FB(4);
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190 sha_info->digest[0] += E;
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191 sha_info->digest[1] += T;
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192 sha_info->digest[2] += A;
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193 sha_info->digest[3] += B;
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194 sha_info->digest[4] += C;
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195 #else /* !UNRAVEL */
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196 #ifdef UNROLL_LOOPS
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197 FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1);
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198 FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1); FG(1);
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199 FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2);
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200 FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2); FG(2);
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201 FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3);
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202 FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3); FG(3);
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203 FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4);
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204 FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4); FG(4);
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205 #else /* !UNROLL_LOOPS */
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206 for (i = 0; i < 20; ++i) { FG(1); }
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207 for (i = 20; i < 40; ++i) { FG(2); }
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208 for (i = 40; i < 60; ++i) { FG(3); }
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209 for (i = 60; i < 80; ++i) { FG(4); }
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210 #endif /* !UNROLL_LOOPS */
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211 sha_info->digest[0] += A;
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212 sha_info->digest[1] += B;
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213 sha_info->digest[2] += C;
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214 sha_info->digest[3] += D;
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215 sha_info->digest[4] += E;
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216 #endif /* !UNRAVEL */
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217 }
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218
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219 /* initialize the SHA digest */
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220
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221 static void
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222 sha_init(SHAobject *sha_info)
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223 {
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224 TestEndianness(sha_info->Endianness)
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225
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226 sha_info->digest[0] = 0x67452301L;
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227 sha_info->digest[1] = 0xefcdab89L;
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228 sha_info->digest[2] = 0x98badcfeL;
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229 sha_info->digest[3] = 0x10325476L;
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230 sha_info->digest[4] = 0xc3d2e1f0L;
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231 sha_info->count_lo = 0L;
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232 sha_info->count_hi = 0L;
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233 sha_info->local = 0;
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234 }
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235
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236 /* update the SHA digest */
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237
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238 static void
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239 sha_update(SHAobject *sha_info, SHA_BYTE *buffer, unsigned int count)
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240 {
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241 unsigned int i;
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242 SHA_INT32 clo;
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243
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244 clo = sha_info->count_lo + ((SHA_INT32) count << 3);
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245 if (clo < sha_info->count_lo) {
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246 ++sha_info->count_hi;
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247 }
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248 sha_info->count_lo = clo;
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249 sha_info->count_hi += (SHA_INT32) count >> 29;
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250 if (sha_info->local) {
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251 i = SHA_BLOCKSIZE - sha_info->local;
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252 if (i > count) {
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253 i = count;
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254 }
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255 memcpy(((SHA_BYTE *) sha_info->data) + sha_info->local, buffer, i);
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256 count -= i;
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257 buffer += i;
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258 sha_info->local += i;
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259 if (sha_info->local == SHA_BLOCKSIZE) {
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260 sha_transform(sha_info);
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261 }
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262 else {
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263 return;
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264 }
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265 }
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266 while (count >= SHA_BLOCKSIZE) {
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267 memcpy(sha_info->data, buffer, SHA_BLOCKSIZE);
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268 buffer += SHA_BLOCKSIZE;
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269 count -= SHA_BLOCKSIZE;
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270 sha_transform(sha_info);
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271 }
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272 memcpy(sha_info->data, buffer, count);
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273 sha_info->local = count;
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274 }
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275
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276 /* finish computing the SHA digest */
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277
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278 static void
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279 sha_final(unsigned char digest[20], SHAobject *sha_info)
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280 {
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281 int count;
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282 SHA_INT32 lo_bit_count, hi_bit_count;
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283
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284 lo_bit_count = sha_info->count_lo;
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285 hi_bit_count = sha_info->count_hi;
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286 count = (int) ((lo_bit_count >> 3) & 0x3f);
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287 ((SHA_BYTE *) sha_info->data)[count++] = 0x80;
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288 if (count > SHA_BLOCKSIZE - 8) {
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289 memset(((SHA_BYTE *) sha_info->data) + count, 0,
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290 SHA_BLOCKSIZE - count);
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291 sha_transform(sha_info);
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292 memset((SHA_BYTE *) sha_info->data, 0, SHA_BLOCKSIZE - 8);
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293 }
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294 else {
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295 memset(((SHA_BYTE *) sha_info->data) + count, 0,
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296 SHA_BLOCKSIZE - 8 - count);
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297 }
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298
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299 /* GJS: note that we add the hi/lo in big-endian. sha_transform will
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300 swap these values into host-order. */
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301 sha_info->data[56] = (hi_bit_count >> 24) & 0xff;
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302 sha_info->data[57] = (hi_bit_count >> 16) & 0xff;
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303 sha_info->data[58] = (hi_bit_count >> 8) & 0xff;
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304 sha_info->data[59] = (hi_bit_count >> 0) & 0xff;
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305 sha_info->data[60] = (lo_bit_count >> 24) & 0xff;
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306 sha_info->data[61] = (lo_bit_count >> 16) & 0xff;
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307 sha_info->data[62] = (lo_bit_count >> 8) & 0xff;
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308 sha_info->data[63] = (lo_bit_count >> 0) & 0xff;
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309 sha_transform(sha_info);
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310 digest[ 0] = (unsigned char) ((sha_info->digest[0] >> 24) & 0xff);
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311 digest[ 1] = (unsigned char) ((sha_info->digest[0] >> 16) & 0xff);
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312 digest[ 2] = (unsigned char) ((sha_info->digest[0] >> 8) & 0xff);
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313 digest[ 3] = (unsigned char) ((sha_info->digest[0] ) & 0xff);
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314 digest[ 4] = (unsigned char) ((sha_info->digest[1] >> 24) & 0xff);
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315 digest[ 5] = (unsigned char) ((sha_info->digest[1] >> 16) & 0xff);
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316 digest[ 6] = (unsigned char) ((sha_info->digest[1] >> 8) & 0xff);
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317 digest[ 7] = (unsigned char) ((sha_info->digest[1] ) & 0xff);
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318 digest[ 8] = (unsigned char) ((sha_info->digest[2] >> 24) & 0xff);
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319 digest[ 9] = (unsigned char) ((sha_info->digest[2] >> 16) & 0xff);
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320 digest[10] = (unsigned char) ((sha_info->digest[2] >> 8) & 0xff);
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321 digest[11] = (unsigned char) ((sha_info->digest[2] ) & 0xff);
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322 digest[12] = (unsigned char) ((sha_info->digest[3] >> 24) & 0xff);
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323 digest[13] = (unsigned char) ((sha_info->digest[3] >> 16) & 0xff);
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324 digest[14] = (unsigned char) ((sha_info->digest[3] >> 8) & 0xff);
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325 digest[15] = (unsigned char) ((sha_info->digest[3] ) & 0xff);
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326 digest[16] = (unsigned char) ((sha_info->digest[4] >> 24) & 0xff);
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327 digest[17] = (unsigned char) ((sha_info->digest[4] >> 16) & 0xff);
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328 digest[18] = (unsigned char) ((sha_info->digest[4] >> 8) & 0xff);
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329 digest[19] = (unsigned char) ((sha_info->digest[4] ) & 0xff);
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330 }
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331
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332 /*
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333 * End of copied SHA code.
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334 *
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335 * ------------------------------------------------------------------------
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336 */
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337
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338 static PyTypeObject SHAtype;
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339
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340
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341 static SHAobject *
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342 newSHAobject(void)
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343 {
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344 return (SHAobject *)PyObject_New(SHAobject, &SHAtype);
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345 }
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346
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347 /* Internal methods for a hashing object */
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348
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349 static void
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350 SHA_dealloc(PyObject *ptr)
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351 {
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352 PyObject_Del(ptr);
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353 }
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354
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355
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356 /* External methods for a hashing object */
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357
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358 PyDoc_STRVAR(SHA_copy__doc__, "Return a copy of the hashing object.");
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359
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360 static PyObject *
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361 SHA_copy(SHAobject *self, PyObject *unused)
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362 {
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363 SHAobject *newobj;
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364
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365 if ( (newobj = newSHAobject())==NULL)
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366 return NULL;
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367
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368 SHAcopy(self, newobj);
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369 return (PyObject *)newobj;
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370 }
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371
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372 PyDoc_STRVAR(SHA_digest__doc__,
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diff changeset
373 "Return the digest value as a string of binary data.");
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374
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375 static PyObject *
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376 SHA_digest(SHAobject *self, PyObject *unused)
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377 {
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378 unsigned char digest[SHA_DIGESTSIZE];
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379 SHAobject temp;
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380
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381 SHAcopy(self, &temp);
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382 sha_final(digest, &temp);
47527
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Gregory P. Smith <greg@mad-scientist.com>
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383 return PyString_FromStringAndSize((const char *)digest, sizeof(digest));
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384 }
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385
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386 PyDoc_STRVAR(SHA_hexdigest__doc__,
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387 "Return the digest value as a string of hexadecimal digits.");
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388
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389 static PyObject *
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Georg Brandl <georg@python.org>
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390 SHA_hexdigest(SHAobject *self, PyObject *unused)
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391 {
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392 unsigned char digest[SHA_DIGESTSIZE];
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393 SHAobject temp;
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394 PyObject *retval;
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395 char *hex_digest;
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396 int i, j;
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397
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398 /* Get the raw (binary) digest value */
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399 SHAcopy(self, &temp);
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400 sha_final(digest, &temp);
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401
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402 /* Create a new string */
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403 retval = PyString_FromStringAndSize(NULL, sizeof(digest) * 2);
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404 if (!retval)
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405 return NULL;
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parents: 47294
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406 hex_digest = PyString_AsString(retval);
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43f4f8d15971 SHA_hexdigest(): A couple of small patches to this function, added
Barry Warsaw <barry@python.org>
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407 if (!hex_digest) {
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408 Py_DECREF(retval);
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409 return NULL;
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410 }
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411
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412 /* Make hex version of the digest */
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413 for(i=j=0; i<sizeof(digest); i++) {
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414 char c;
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415 c = (digest[i] >> 4) & 0xf;
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416 c = (c>9) ? c+'a'-10 : c + '0';
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417 hex_digest[j++] = c;
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418 c = (digest[i] & 0xf);
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419 c = (c>9) ? c+'a'-10 : c + '0';
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420 hex_digest[j++] = c;
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421 }
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422 return retval;
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423 }
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diff changeset
424
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diff changeset
425 PyDoc_STRVAR(SHA_update__doc__,
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426 "Update this hashing object's state with the provided string.");
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427
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428 static PyObject *
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429 SHA_update(SHAobject *self, PyObject *args)
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430 {
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431 Py_buffer view;
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432 Py_ssize_t n;
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433 unsigned char *buf;
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parents:
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434
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ff5bc2fa38d6 Issue #3745: Undo the requirement for new buffer API only objects to be passed
Gregory P. Smith <greg@mad-scientist.com>
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435 if (!PyArg_ParseTuple(args, "s*:update", &view))
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436 return NULL;
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437
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Jesus Cea <jcea@jcea.es>
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438 n = view.len;
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parents: 78974
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439 buf = (unsigned char *) view.buf;
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440 while (n > 0) {
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441 Py_ssize_t nbytes;
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442 if (n > INT_MAX)
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443 nbytes = INT_MAX;
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444 else
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445 nbytes = n;
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446 sha_update(self, buf,
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diff changeset
447 Py_SAFE_DOWNCAST(nbytes, Py_ssize_t, unsigned int));
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448 buf += nbytes;
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449 n -= nbytes;
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450 }
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451
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452 PyBuffer_Release(&view);
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453 Py_RETURN_NONE;
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454 }
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455
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456 static PyMethodDef SHA_methods[] = {
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457 {"copy", (PyCFunction)SHA_copy, METH_NOARGS, SHA_copy__doc__},
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458 {"digest", (PyCFunction)SHA_digest, METH_NOARGS, SHA_digest__doc__},
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459 {"hexdigest", (PyCFunction)SHA_hexdigest, METH_NOARGS, SHA_hexdigest__doc__},
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460 {"update", (PyCFunction)SHA_update, METH_VARARGS, SHA_update__doc__},
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461 {NULL, NULL} /* sentinel */
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462 };
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463
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464 static PyObject *
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465 SHA_get_block_size(PyObject *self, void *closure)
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466 {
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467 return PyInt_FromLong(SHA_BLOCKSIZE);
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468 }
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469
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470 static PyObject *
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471 SHA_get_digest_size(PyObject *self, void *closure)
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472 {
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473 return PyInt_FromLong(SHA_DIGESTSIZE);
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474 }
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475
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476 static PyObject *
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477 SHA_get_name(PyObject *self, void *closure)
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478 {
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479 return PyString_FromStringAndSize("SHA1", 4);
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480 }
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481
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482 static PyGetSetDef SHA_getseters[] = {
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483 {"digest_size",
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484 (getter)SHA_get_digest_size, NULL,
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485 NULL,
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486 NULL},
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487 {"block_size",
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488 (getter)SHA_get_block_size, NULL,
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489 NULL,
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490 NULL},
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491 {"name",
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492 (getter)SHA_get_name, NULL,
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493 NULL,
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494 NULL},
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495 /* the old md5 and sha modules support 'digest_size' as in PEP 247.
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496 * the old sha module also supported 'digestsize'. ugh. */
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497 {"digestsize",
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498 (getter)SHA_get_digest_size, NULL,
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499 NULL,
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500 NULL},
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501 {NULL} /* Sentinel */
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502 };
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503
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504 static PyTypeObject SHAtype = {
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505 PyVarObject_HEAD_INIT(NULL, 0)
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506 "_sha.sha", /*tp_name*/
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507 sizeof(SHAobject), /*tp_size*/
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508 0, /*tp_itemsize*/
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509 /* methods */
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510 SHA_dealloc, /*tp_dealloc*/
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511 0, /*tp_print*/
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512 0, /*tp_getattr*/
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513 0, /*tp_setattr*/
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514 0, /*tp_compare*/
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515 0, /*tp_repr*/
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516 0, /*tp_as_number*/
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517 0, /*tp_as_sequence*/
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518 0, /*tp_as_mapping*/
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519 0, /*tp_hash*/
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520 0, /*tp_call*/
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521 0, /*tp_str*/
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522 0, /*tp_getattro*/
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523 0, /*tp_setattro*/
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524 0, /*tp_as_buffer*/
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525 Py_TPFLAGS_DEFAULT, /*tp_flags*/
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526 0, /*tp_doc*/
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527 0, /*tp_traverse*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
528 0, /*tp_clear*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
529 0, /*tp_richcompare*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
530 0, /*tp_weaklistoffset*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
531 0, /*tp_iter*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
532 0, /*tp_iternext*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
533 SHA_methods, /* tp_methods */
35375
624918e1c1b2 [ sf.net patch # 1121611 ]
Gregory P. Smith <greg@mad-scientist.com>
parents: 25966
diff changeset
534 0, /* tp_members */
624918e1c1b2 [ sf.net patch # 1121611 ]
Gregory P. Smith <greg@mad-scientist.com>
parents: 25966
diff changeset
535 SHA_getseters, /* tp_getset */
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
536 };
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
537
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
538
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
539 /* The single module-level function: new() */
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
540
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22727
diff changeset
541 PyDoc_STRVAR(SHA_new__doc__,
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22727
diff changeset
542 "Return a new SHA hashing object. An optional string argument\n\
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22727
diff changeset
543 may be provided; if present, this string will be automatically\n\
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22727
diff changeset
544 hashed.");
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
545
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
546 static PyObject *
13429
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
547 SHA_new(PyObject *self, PyObject *args, PyObject *kwdict)
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
548 {
36675
dba6494735d0 Revert backwards-incompatible const changes.
Martin v. Löwis <martin@v.loewis.de>
parents: 36501
diff changeset
549 static char *kwlist[] = {"string", NULL};
13429
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
550 SHAobject *new;
58101
ff5bc2fa38d6 Issue #3745: Undo the requirement for new buffer API only objects to be passed
Gregory P. Smith <greg@mad-scientist.com>
parents: 51961
diff changeset
551 Py_buffer view = { 0 };
78974
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
552 Py_ssize_t n;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
553 unsigned char *buf;
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
554
58101
ff5bc2fa38d6 Issue #3745: Undo the requirement for new buffer API only objects to be passed
Gregory P. Smith <greg@mad-scientist.com>
parents: 51961
diff changeset
555 if (!PyArg_ParseTupleAndKeywords(args, kwdict, "|s*:new", kwlist,
ff5bc2fa38d6 Issue #3745: Undo the requirement for new buffer API only objects to be passed
Gregory P. Smith <greg@mad-scientist.com>
parents: 51961
diff changeset
556 &view)) {
13429
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
557 return NULL;
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
558 }
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
559
51580
1e7ac14e4938 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
Gregory P. Smith <greg@mad-scientist.com>
parents: 47527
diff changeset
560 if ((new = newSHAobject()) == NULL) {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 58101
diff changeset
561 PyBuffer_Release(&view);
16354
c3b75a7fad3f Cleanup logic a little. Check args first, then try to create the
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 15803
diff changeset
562 return NULL;
51580
1e7ac14e4938 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
Gregory P. Smith <greg@mad-scientist.com>
parents: 47527
diff changeset
563 }
16354
c3b75a7fad3f Cleanup logic a little. Check args first, then try to create the
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 15803
diff changeset
564
13429
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Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
565 sha_init(new);
10458
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Guido van Rossum <guido@python.org>
parents:
diff changeset
566
13429
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Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
567 if (PyErr_Occurred()) {
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
568 Py_DECREF(new);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 58101
diff changeset
569 PyBuffer_Release(&view);
13429
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Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
570 return NULL;
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
571 }
78974
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
572
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
573 n = view.len;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
574 buf = (unsigned char *) view.buf;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
575 while (n > 0) {
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
576 Py_ssize_t nbytes;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
577 if (n > INT_MAX)
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
578 nbytes = INT_MAX;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
579 else
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
580 nbytes = n;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
581 sha_update(new, buf,
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
582 Py_SAFE_DOWNCAST(nbytes, Py_ssize_t, unsigned int));
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
583 buf += nbytes;
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
584 n -= nbytes;
51580
1e7ac14e4938 - Issue #3745: Fix hashlib to always reject unicode and non buffer-api
Gregory P. Smith <greg@mad-scientist.com>
parents: 47527
diff changeset
585 }
78974
a13bfc238f27 Closes #15908: SHA1 crashes in 64 bits when the string to hash is bigger than 2**32 bytes
Jesus Cea <jcea@jcea.es>
parents: 68256
diff changeset
586
58101
ff5bc2fa38d6 Issue #3745: Undo the requirement for new buffer API only objects to be passed
Gregory P. Smith <greg@mad-scientist.com>
parents: 51961
diff changeset
587 PyBuffer_Release(&view);
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
588
13429
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Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
589 return (PyObject *)new;
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
590 }
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
591
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
592
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
593 /* List of functions exported by this module */
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
594
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
595 static struct PyMethodDef SHA_functions[] = {
13429
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
596 {"new", (PyCFunction)SHA_new, METH_VARARGS|METH_KEYWORDS, SHA_new__doc__},
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
597 {NULL, NULL} /* Sentinel */
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
598 };
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
599
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
600
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
601 /* Initialize this module. */
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
602
20849
404aeeca51e9 Clean up a Tab inconsistency.
Fred Drake <fdrake@acm.org>
parents: 20843
diff changeset
603 #define insint(n,v) { PyModule_AddIntConstant(m,n,v); }
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
604
24471
f66b3a3509c7 Excise DL_EXPORT/DL_IMPORT from Modules/*. Required adding a prototype
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
605 PyMODINIT_FUNC
35375
624918e1c1b2 [ sf.net patch # 1121611 ]
Gregory P. Smith <greg@mad-scientist.com>
parents: 25966
diff changeset
606 init_sha(void)
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
607 {
22727
0973693e4ad2 Remove unused variable and call to PyModule_GetDict().
Fred Drake <fdrake@acm.org>
parents: 21313
diff changeset
608 PyObject *m;
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
609
44350
26384b8180c7 #1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT. Macros for b/w compatibility are available.
Christian Heimes <christian@cheimes.de>
parents: 43298
diff changeset
610 Py_TYPE(&SHAtype) = &PyType_Type;
35375
624918e1c1b2 [ sf.net patch # 1121611 ]
Gregory P. Smith <greg@mad-scientist.com>
parents: 25966
diff changeset
611 if (PyType_Ready(&SHAtype) < 0)
624918e1c1b2 [ sf.net patch # 1121611 ]
Gregory P. Smith <greg@mad-scientist.com>
parents: 25966
diff changeset
612 return;
624918e1c1b2 [ sf.net patch # 1121611 ]
Gregory P. Smith <greg@mad-scientist.com>
parents: 25966
diff changeset
613 m = Py_InitModule("_sha", SHA_functions);
36324
1af7f719ed28 Check return result from Py_InitModule*(). This API can fail.
Neal Norwitz <nnorwitz@gmail.com>
parents: 35375
diff changeset
614 if (m == NULL)
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
615 return;
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
616
13429
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
617 /* Add some symbolic constants to the module */
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
618 insint("blocksize", 1); /* For future use, in case some hash
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
619 functions require an integral number of
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 47527
diff changeset
620 blocks */
13429
8a3d50ed06f7 ANSI-fied sources, converted to four-space indentation.
Fred Drake <fdrake@acm.org>
parents: 13255
diff changeset
621 insint("digestsize", 20);
20843
8d14f534a5c2 [Patch #476612] Add attributes from PEP247 to the md5 and sha modules
Andrew M. Kuchling <amk@amk.ca>
parents: 16354
diff changeset
622 insint("digest_size", 20);
10458
70910e3125a2 Added Greg Stein and Andrew Kuchling's sha module.
Guido van Rossum <guido@python.org>
parents:
diff changeset
623 }