annotate src/sha256.c @ 6821:cd7a7975f92c v7.4.732

patch 7.4.732 Problem: The cursor line is not always updated for the "O" command. Solution: Reset the VALID_CROW flag. (Christian Brabandt)
author Bram Moolenaar <bram@vim.org>
date Tue, 09 Jun 2015 19:23:46 +0200
parents 2b340e5c5baa
children 0b6c37dd858d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* vi:set ts=8 sts=4 sw=4:
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2 *
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3 * VIM - Vi IMproved by Bram Moolenaar
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4 *
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5 * Do ":help uganda" in Vim to read copying and usage conditions.
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6 * Do ":help credits" in Vim to see a list of people who contributed.
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7 * See README.txt for an overview of the Vim source code.
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8 *
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9 * FIPS-180-2 compliant SHA-256 implementation
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10 * GPL by Christophe Devine, applies to older version.
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11 * Modified for md5deep, in public domain.
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12 * Modified For Vim, Mohsin Ahmed, http://www.cs.albany.edu/~mosh
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13 * Mohsin Ahmed states this work is distributed under the VIM License or GPL,
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14 * at your choice.
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15 *
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16 * Vim specific notes:
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17 * Functions exported by this file:
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18 * 1. sha256_key() hashes the password to 64 bytes char string.
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19 * 2. sha2_seed() generates a random header.
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20 * sha256_self_test() is implicitly called once.
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21 */
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22
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23 #include "vim.h"
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24
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25 #if defined(FEAT_CRYPT) || defined(FEAT_PERSISTENT_UNDO)
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26
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27 static void sha256_process __ARGS((context_sha256_T *ctx, char_u data[64]));
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28
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29 #define GET_UINT32(n, b, i) \
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30 { \
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31 (n) = ( (UINT32_T)(b)[(i) ] << 24) \
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32 | ( (UINT32_T)(b)[(i) + 1] << 16) \
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33 | ( (UINT32_T)(b)[(i) + 2] << 8) \
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34 | ( (UINT32_T)(b)[(i) + 3] ); \
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35 }
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36
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37 #define PUT_UINT32(n,b,i) \
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38 { \
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39 (b)[(i) ] = (char_u)((n) >> 24); \
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40 (b)[(i) + 1] = (char_u)((n) >> 16); \
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41 (b)[(i) + 2] = (char_u)((n) >> 8); \
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42 (b)[(i) + 3] = (char_u)((n) ); \
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43 }
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44
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45 void
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46 sha256_start(ctx)
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47 context_sha256_T *ctx;
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48 {
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49 ctx->total[0] = 0;
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50 ctx->total[1] = 0;
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51
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52 ctx->state[0] = 0x6A09E667;
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53 ctx->state[1] = 0xBB67AE85;
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54 ctx->state[2] = 0x3C6EF372;
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55 ctx->state[3] = 0xA54FF53A;
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56 ctx->state[4] = 0x510E527F;
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57 ctx->state[5] = 0x9B05688C;
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58 ctx->state[6] = 0x1F83D9AB;
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59 ctx->state[7] = 0x5BE0CD19;
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60 }
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61
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62 static void
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63 sha256_process(ctx, data)
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64 context_sha256_T *ctx;
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65 char_u data[64];
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66 {
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67 UINT32_T temp1, temp2, W[64];
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68 UINT32_T A, B, C, D, E, F, G, H;
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69
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70 GET_UINT32(W[0], data, 0);
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71 GET_UINT32(W[1], data, 4);
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72 GET_UINT32(W[2], data, 8);
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73 GET_UINT32(W[3], data, 12);
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74 GET_UINT32(W[4], data, 16);
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75 GET_UINT32(W[5], data, 20);
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76 GET_UINT32(W[6], data, 24);
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77 GET_UINT32(W[7], data, 28);
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78 GET_UINT32(W[8], data, 32);
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79 GET_UINT32(W[9], data, 36);
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80 GET_UINT32(W[10], data, 40);
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81 GET_UINT32(W[11], data, 44);
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82 GET_UINT32(W[12], data, 48);
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83 GET_UINT32(W[13], data, 52);
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84 GET_UINT32(W[14], data, 56);
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85 GET_UINT32(W[15], data, 60);
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86
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87 #define SHR(x, n) ((x & 0xFFFFFFFF) >> n)
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88 #define ROTR(x, n) (SHR(x, n) | (x << (32 - n)))
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89
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90 #define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
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91 #define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
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92
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93 #define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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94 #define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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95
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96 #define F0(x, y, z) ((x & y) | (z & (x | y)))
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97 #define F1(x, y, z) (z ^ (x & (y ^ z)))
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98
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99 #define R(t) \
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100 ( \
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101 W[t] = S1(W[t - 2]) + W[t - 7] + \
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102 S0(W[t - 15]) + W[t - 16] \
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103 )
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104
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105 #define P(a,b,c,d,e,f,g,h,x,K) \
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106 { \
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107 temp1 = h + S3(e) + F1(e, f, g) + K + x; \
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108 temp2 = S2(a) + F0(a, b, c); \
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109 d += temp1; h = temp1 + temp2; \
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110 }
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111
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112 A = ctx->state[0];
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113 B = ctx->state[1];
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114 C = ctx->state[2];
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115 D = ctx->state[3];
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116 E = ctx->state[4];
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117 F = ctx->state[5];
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118 G = ctx->state[6];
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119 H = ctx->state[7];
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120
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diff changeset
121 P( A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
122 P( H, A, B, C, D, E, F, G, W[ 1], 0x71374491);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
123 P( G, H, A, B, C, D, E, F, W[ 2], 0xB5C0FBCF);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
124 P( F, G, H, A, B, C, D, E, W[ 3], 0xE9B5DBA5);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
125 P( E, F, G, H, A, B, C, D, W[ 4], 0x3956C25B);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
126 P( D, E, F, G, H, A, B, C, W[ 5], 0x59F111F1);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
127 P( C, D, E, F, G, H, A, B, W[ 6], 0x923F82A4);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
128 P( B, C, D, E, F, G, H, A, W[ 7], 0xAB1C5ED5);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
129 P( A, B, C, D, E, F, G, H, W[ 8], 0xD807AA98);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
130 P( H, A, B, C, D, E, F, G, W[ 9], 0x12835B01);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
131 P( G, H, A, B, C, D, E, F, W[10], 0x243185BE);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
132 P( F, G, H, A, B, C, D, E, W[11], 0x550C7DC3);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
133 P( E, F, G, H, A, B, C, D, W[12], 0x72BE5D74);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
134 P( D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
135 P( C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
136 P( B, C, D, E, F, G, H, A, W[15], 0xC19BF174);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
137 P( A, B, C, D, E, F, G, H, R(16), 0xE49B69C1);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
138 P( H, A, B, C, D, E, F, G, R(17), 0xEFBE4786);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
139 P( G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
140 P( F, G, H, A, B, C, D, E, R(19), 0x240CA1CC);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
141 P( E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
142 P( D, E, F, G, H, A, B, C, R(21), 0x4A7484AA);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
143 P( C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
144 P( B, C, D, E, F, G, H, A, R(23), 0x76F988DA);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
145 P( A, B, C, D, E, F, G, H, R(24), 0x983E5152);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
146 P( H, A, B, C, D, E, F, G, R(25), 0xA831C66D);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
147 P( G, H, A, B, C, D, E, F, R(26), 0xB00327C8);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
148 P( F, G, H, A, B, C, D, E, R(27), 0xBF597FC7);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
149 P( E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
150 P( D, E, F, G, H, A, B, C, R(29), 0xD5A79147);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
151 P( C, D, E, F, G, H, A, B, R(30), 0x06CA6351);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
152 P( B, C, D, E, F, G, H, A, R(31), 0x14292967);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
153 P( A, B, C, D, E, F, G, H, R(32), 0x27B70A85);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
154 P( H, A, B, C, D, E, F, G, R(33), 0x2E1B2138);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
155 P( G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
156 P( F, G, H, A, B, C, D, E, R(35), 0x53380D13);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
157 P( E, F, G, H, A, B, C, D, R(36), 0x650A7354);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
158 P( D, E, F, G, H, A, B, C, R(37), 0x766A0ABB);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
159 P( C, D, E, F, G, H, A, B, R(38), 0x81C2C92E);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
160 P( B, C, D, E, F, G, H, A, R(39), 0x92722C85);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
161 P( A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
162 P( H, A, B, C, D, E, F, G, R(41), 0xA81A664B);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
163 P( G, H, A, B, C, D, E, F, R(42), 0xC24B8B70);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
164 P( F, G, H, A, B, C, D, E, R(43), 0xC76C51A3);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
165 P( E, F, G, H, A, B, C, D, R(44), 0xD192E819);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
166 P( D, E, F, G, H, A, B, C, R(45), 0xD6990624);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
167 P( C, D, E, F, G, H, A, B, R(46), 0xF40E3585);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
168 P( B, C, D, E, F, G, H, A, R(47), 0x106AA070);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
169 P( A, B, C, D, E, F, G, H, R(48), 0x19A4C116);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
170 P( H, A, B, C, D, E, F, G, R(49), 0x1E376C08);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
171 P( G, H, A, B, C, D, E, F, R(50), 0x2748774C);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
172 P( F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
173 P( E, F, G, H, A, B, C, D, R(52), 0x391C0CB3);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
174 P( D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
175 P( C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
176 P( B, C, D, E, F, G, H, A, R(55), 0x682E6FF3);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
177 P( A, B, C, D, E, F, G, H, R(56), 0x748F82EE);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
178 P( H, A, B, C, D, E, F, G, R(57), 0x78A5636F);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
179 P( G, H, A, B, C, D, E, F, R(58), 0x84C87814);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
180 P( F, G, H, A, B, C, D, E, R(59), 0x8CC70208);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
181 P( E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
182 P( D, E, F, G, H, A, B, C, R(61), 0xA4506CEB);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
183 P( C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
184 P( B, C, D, E, F, G, H, A, R(63), 0xC67178F2);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
185
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
186 ctx->state[0] += A;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
187 ctx->state[1] += B;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
188 ctx->state[2] += C;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
189 ctx->state[3] += D;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
190 ctx->state[4] += E;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
191 ctx->state[5] += F;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
192 ctx->state[6] += G;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
193 ctx->state[7] += H;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
194 }
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
195
2214
f8222d1f9a73 Included patch for persistent undo. Lots of changes and added test.
Bram Moolenaar <bram@vim.org>
parents: 2199
diff changeset
196 void
2180
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
197 sha256_update(ctx, input, length)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
198 context_sha256_T *ctx;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
199 char_u *input;
2199
014a996ac896 Use UINT32_T in the code, define it to uint32_t or unsigned int.
Bram Moolenaar <bram@vim.org>
parents: 2184
diff changeset
200 UINT32_T length;
2180
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
201 {
2199
014a996ac896 Use UINT32_T in the code, define it to uint32_t or unsigned int.
Bram Moolenaar <bram@vim.org>
parents: 2184
diff changeset
202 UINT32_T left, fill;
2180
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
203
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
204 if (length == 0)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
205 return;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
206
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
207 left = ctx->total[0] & 0x3F;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
208 fill = 64 - left;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
209
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
210 ctx->total[0] += length;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
211 ctx->total[0] &= 0xFFFFFFFF;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
212
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
213 if (ctx->total[0] < length)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
214 ctx->total[1]++;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
215
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
216 if (left && length >= fill)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
217 {
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
218 memcpy((void *)(ctx->buffer + left), (void *)input, fill);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
219 sha256_process(ctx, ctx->buffer);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
220 length -= fill;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
221 input += fill;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
222 left = 0;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
223 }
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
224
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
225 while (length >= 64)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
226 {
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
227 sha256_process(ctx, input);
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Bram Moolenaar <bram@vim.org>
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228 length -= 64;
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229 input += 64;
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230 }
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231
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232 if (length)
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233 memcpy((void *)(ctx->buffer + left), (void *)input, length);
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234 }
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235
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236 static char_u sha256_padding[64] = {
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237 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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238 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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240 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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241 };
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242
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243 void
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244 sha256_finish(ctx, digest)
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245 context_sha256_T *ctx;
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246 char_u digest[32];
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247 {
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248 UINT32_T last, padn;
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249 UINT32_T high, low;
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250 char_u msglen[8];
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251
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252 high = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
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253 low = (ctx->total[0] << 3);
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254
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255 PUT_UINT32(high, msglen, 0);
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256 PUT_UINT32(low, msglen, 4);
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257
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258 last = ctx->total[0] & 0x3F;
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259 padn = (last < 56) ? (56 - last) : (120 - last);
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260
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261 sha256_update(ctx, sha256_padding, padn);
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262 sha256_update(ctx, msglen, 8);
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263
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264 PUT_UINT32(ctx->state[0], digest, 0);
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265 PUT_UINT32(ctx->state[1], digest, 4);
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266 PUT_UINT32(ctx->state[2], digest, 8);
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267 PUT_UINT32(ctx->state[3], digest, 12);
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268 PUT_UINT32(ctx->state[4], digest, 16);
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269 PUT_UINT32(ctx->state[5], digest, 20);
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270 PUT_UINT32(ctx->state[6], digest, 24);
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271 PUT_UINT32(ctx->state[7], digest, 28);
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272 }
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273 #endif /* FEAT_CRYPT || FEAT_PERSISTENT_UNDO */
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274
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275 #if defined(FEAT_CRYPT) || defined(PROTO)
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276 static unsigned int get_some_time __ARGS((void));
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277
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278 /*
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279 * Returns hex digest of "buf[buf_len]" in a static array.
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280 * if "salt" is not NULL also do "salt[salt_len]".
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281 */
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282 char_u *
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283 sha256_bytes(buf, buf_len, salt, salt_len)
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284 char_u *buf;
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285 int buf_len;
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286 char_u *salt;
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287 int salt_len;
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288 {
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289 char_u sha256sum[32];
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290 static char_u hexit[65];
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291 int j;
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292 context_sha256_T ctx;
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293
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294 sha256_self_test();
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295
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296 sha256_start(&ctx);
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297 sha256_update(&ctx, buf, buf_len);
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298 if (salt != NULL)
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299 sha256_update(&ctx, salt, salt_len);
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300 sha256_finish(&ctx, sha256sum);
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301 for (j = 0; j < 32; j++)
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302 sprintf((char *)hexit + j * 2, "%02x", sha256sum[j]);
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303 hexit[sizeof(hexit) - 1] = '\0';
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304 return hexit;
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305 }
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306
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307 /*
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308 * Returns sha256(buf) as 64 hex chars in static array.
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309 */
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310 char_u *
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311 sha256_key(buf, salt, salt_len)
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312 char_u *buf;
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313 char_u *salt;
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314 int salt_len;
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315 {
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316 /* No passwd means don't encrypt */
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317 if (buf == NULL || *buf == NUL)
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318 return (char_u *)"";
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319
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320 return sha256_bytes(buf, (int)STRLEN(buf), salt, salt_len);
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321 }
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322
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323 /*
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324 * These are the standard FIPS-180-2 test vectors
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325 */
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326
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327 static char *sha_self_test_msg[] = {
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328 "abc",
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329 "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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330 NULL
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331 };
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332
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333 static char *sha_self_test_vector[] = {
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334 "ba7816bf8f01cfea414140de5dae2223" \
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335 "b00361a396177a9cb410ff61f20015ad",
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336 "248d6a61d20638b8e5c026930c3e6039" \
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337 "a33ce45964ff2167f6ecedd419db06c1",
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338 "cdc76e5c9914fb9281a1c7e284d73e67" \
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339 "f1809a48a497200e046d39ccc7112cd0"
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340 };
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341
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342 /*
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343 * Perform a test on the SHA256 algorithm.
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344 * Return FAIL or OK.
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345 */
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346 int
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347 sha256_self_test()
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348 {
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349 int i, j;
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350 char output[65];
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351 context_sha256_T ctx;
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352 char_u buf[1000];
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353 char_u sha256sum[32];
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354 static int failures = 0;
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355 char_u *hexit;
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356 static int sha256_self_tested = 0;
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357
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358 if (sha256_self_tested > 0)
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359 return failures > 0 ? FAIL : OK;
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360 sha256_self_tested = 1;
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361
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362 for (i = 0; i < 3; i++)
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363 {
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364 if (i < 2)
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365 {
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366 hexit = sha256_bytes((char_u *)sha_self_test_msg[i],
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367 (int)STRLEN(sha_self_test_msg[i]),
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368 NULL, 0);
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369 STRCPY(output, hexit);
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370 }
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371 else
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372 {
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373 sha256_start(&ctx);
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374 vim_memset(buf, 'a', 1000);
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375 for (j = 0; j < 1000; j++)
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376 sha256_update(&ctx, (char_u *)buf, 1000);
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377 sha256_finish(&ctx, sha256sum);
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378 for (j = 0; j < 32; j++)
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379 sprintf(output + j * 2, "%02x", sha256sum[j]);
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380 }
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381 if (memcmp(output, sha_self_test_vector[i], 64))
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382 {
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383 failures++;
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384 output[sizeof(output) - 1] = '\0';
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385 /* printf("sha256_self_test %d failed %s\n", i, output); */
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386 }
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387 }
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388 return failures > 0 ? FAIL : OK;
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389 }
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390
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391 static unsigned int
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392 get_some_time()
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393 {
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394 # ifdef HAVE_GETTIMEOFDAY
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395 struct timeval tv;
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396
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397 /* Using usec makes it less predictable. */
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398 gettimeofday(&tv, NULL);
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399 return (unsigned int)(tv.tv_sec + tv.tv_usec);
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400 # else
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401 return (unsigned int)time(NULL);
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402 # endif
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403 }
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404
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405 /*
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406 * Fill "header[header_len]" with random_data.
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407 * Also "salt[salt_len]" when "salt" is not NULL.
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408 */
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409 void
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410 sha2_seed(header, header_len, salt, salt_len)
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411 char_u *header;
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412 int header_len;
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413 char_u *salt;
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414 int salt_len;
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415 {
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416 int i;
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417 static char_u random_data[1000];
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418 char_u sha256sum[32];
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419 context_sha256_T ctx;
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420
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421 srand(get_some_time());
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422
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423 for (i = 0; i < (int)sizeof(random_data) - 1; i++)
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424 random_data[i] = (char_u)((get_some_time() ^ rand()) & 0xff);
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425 sha256_start(&ctx);
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426 sha256_update(&ctx, (char_u *)random_data, sizeof(random_data));
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427 sha256_finish(&ctx, sha256sum);
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428
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429 /* put first block into header. */
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430 for (i = 0; i < header_len; i++)
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431 header[i] = sha256sum[i % sizeof(sha256sum)];
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432
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433 /* put remaining block into salt. */
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434 if (salt != NULL)
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435 for (i = 0; i < salt_len; i++)
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436 salt[i] = sha256sum[(i + header_len) % sizeof(sha256sum)];
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437 }
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438
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439 #endif /* FEAT_CRYPT */