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annotate src/sha256.c @ 9919:885e3c9c0e10 v7.4.2233

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commit https://github.com/vim/vim/commit/843b884461de1c79a1d2748549776fb13fc94360 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 21 14:36:15 2016 +0200 patch 7.4.2233 Problem: Crash when using funcref() with invalid name. (Dominique Pelle) Solution: Check for NULL translated name.
author Christian Brabandt <cb@256bit.org>
date Sun, 21 Aug 2016 14:45:05 +0200
parents 4d7ce6c03fda
children 4aead6a9b7a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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(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(context_sha256_T *ctx)
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47 {
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48 ctx->total[0] = 0;
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49 ctx->total[1] = 0;
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50
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51 ctx->state[0] = 0x6A09E667;
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52 ctx->state[1] = 0xBB67AE85;
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53 ctx->state[2] = 0x3C6EF372;
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54 ctx->state[3] = 0xA54FF53A;
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55 ctx->state[4] = 0x510E527F;
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56 ctx->state[5] = 0x9B05688C;
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57 ctx->state[6] = 0x1F83D9AB;
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58 ctx->state[7] = 0x5BE0CD19;
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59 }
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60
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61 static void
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62 sha256_process(context_sha256_T *ctx, char_u data[64])
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63 {
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64 UINT32_T temp1, temp2, W[64];
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65 UINT32_T A, B, C, D, E, F, G, H;
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66
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67 GET_UINT32(W[0], data, 0);
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68 GET_UINT32(W[1], data, 4);
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69 GET_UINT32(W[2], data, 8);
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70 GET_UINT32(W[3], data, 12);
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71 GET_UINT32(W[4], data, 16);
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72 GET_UINT32(W[5], data, 20);
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73 GET_UINT32(W[6], data, 24);
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74 GET_UINT32(W[7], data, 28);
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75 GET_UINT32(W[8], data, 32);
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76 GET_UINT32(W[9], data, 36);
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77 GET_UINT32(W[10], data, 40);
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78 GET_UINT32(W[11], data, 44);
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79 GET_UINT32(W[12], data, 48);
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80 GET_UINT32(W[13], data, 52);
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81 GET_UINT32(W[14], data, 56);
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82 GET_UINT32(W[15], data, 60);
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83
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84 #define SHR(x, n) ((x & 0xFFFFFFFF) >> n)
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85 #define ROTR(x, n) (SHR(x, n) | (x << (32 - n)))
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86
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87 #define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
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88 #define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
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89
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90 #define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
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91 #define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
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92
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93 #define F0(x, y, z) ((x & y) | (z & (x | y)))
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94 #define F1(x, y, z) (z ^ (x & (y ^ z)))
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95
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96 #define R(t) \
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97 ( \
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98 W[t] = S1(W[t - 2]) + W[t - 7] + \
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99 S0(W[t - 15]) + W[t - 16] \
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100 )
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101
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102 #define P(a,b,c,d,e,f,g,h,x,K) \
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103 { \
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104 temp1 = h + S3(e) + F1(e, f, g) + K + x; \
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105 temp2 = S2(a) + F0(a, b, c); \
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106 d += temp1; h = temp1 + temp2; \
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107 }
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108
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109 A = ctx->state[0];
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110 B = ctx->state[1];
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111 C = ctx->state[2];
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112 D = ctx->state[3];
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113 E = ctx->state[4];
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114 F = ctx->state[5];
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115 G = ctx->state[6];
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116 H = ctx->state[7];
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117
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118 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
119 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
120 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
121 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
122 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
123 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
124 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
125 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
126 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
127 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
128 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
129 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
130 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
131 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
132 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
133 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
134 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
135 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
136 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
137 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
138 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
139 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
140 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
141 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
142 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
143 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
144 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
145 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
146 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
147 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
148 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
149 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
150 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
151 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
152 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
153 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
154 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
155 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
156 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
157 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
158 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
159 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
160 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
161 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
162 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
163 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
164 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
165 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
166 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
167 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
168 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
169 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
170 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
171 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
172 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
173 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
174 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
175 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
176 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
177 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
178 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
179 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
180 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
181 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
182
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
183 ctx->state[0] += A;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
184 ctx->state[1] += B;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
185 ctx->state[2] += C;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
186 ctx->state[3] += D;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
187 ctx->state[4] += E;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
188 ctx->state[5] += F;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
189 ctx->state[6] += G;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
190 ctx->state[7] += H;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
191 }
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
192
2214
f8222d1f9a73 Included patch for persistent undo. Lots of changes and added test.
Bram Moolenaar <bram@vim.org>
parents: 2199
diff changeset
193 void
7835
4d7ce6c03fda commit https://github.com/vim/vim/commit/764b23c8fd3369cb05ae9122abf3ca16fec539d7
Christian Brabandt <cb@256bit.org>
parents: 7805
diff changeset
194 sha256_update(context_sha256_T *ctx, char_u *input, UINT32_T length)
2180
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
195 {
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
196 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
197
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
198 if (length == 0)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
199 return;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
200
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
201 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
202 fill = 64 - left;
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 ctx->total[0] += length;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
205 ctx->total[0] &= 0xFFFFFFFF;
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 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
208 ctx->total[1]++;
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 if (left && length >= fill)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
211 {
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
212 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
213 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
214 length -= fill;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
215 input += fill;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
216 left = 0;
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
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
219 while (length >= 64)
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
220 {
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
221 sha256_process(ctx, input);
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
222 length -= 64;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
223 input += 64;
f60a0c9cbe6c Add the blowfish encryption patch from Mohsin Ahmed. Needs more work.
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
224 }
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225
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226 if (length)
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227 memcpy((void *)(ctx->buffer + left), (void *)input, length);
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228 }
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229
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230 static char_u sha256_padding[64] = {
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231 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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232 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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233 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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234 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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235 };
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236
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237 void
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238 sha256_finish(context_sha256_T *ctx, char_u digest[32])
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239 {
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240 UINT32_T last, padn;
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241 UINT32_T high, low;
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242 char_u msglen[8];
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243
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244 high = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
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245 low = (ctx->total[0] << 3);
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246
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247 PUT_UINT32(high, msglen, 0);
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248 PUT_UINT32(low, msglen, 4);
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249
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250 last = ctx->total[0] & 0x3F;
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251 padn = (last < 56) ? (56 - last) : (120 - last);
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252
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253 sha256_update(ctx, sha256_padding, padn);
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254 sha256_update(ctx, msglen, 8);
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255
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256 PUT_UINT32(ctx->state[0], digest, 0);
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257 PUT_UINT32(ctx->state[1], digest, 4);
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258 PUT_UINT32(ctx->state[2], digest, 8);
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259 PUT_UINT32(ctx->state[3], digest, 12);
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260 PUT_UINT32(ctx->state[4], digest, 16);
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261 PUT_UINT32(ctx->state[5], digest, 20);
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262 PUT_UINT32(ctx->state[6], digest, 24);
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263 PUT_UINT32(ctx->state[7], digest, 28);
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264 }
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265 #endif /* FEAT_CRYPT || FEAT_PERSISTENT_UNDO */
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266
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267 #if defined(FEAT_CRYPT) || defined(PROTO)
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268 static unsigned int get_some_time(void);
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269
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270 /*
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271 * Returns hex digest of "buf[buf_len]" in a static array.
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272 * if "salt" is not NULL also do "salt[salt_len]".
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273 */
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274 char_u *
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275 sha256_bytes(
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276 char_u *buf,
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277 int buf_len,
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278 char_u *salt,
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279 int salt_len)
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280 {
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281 char_u sha256sum[32];
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282 static char_u hexit[65];
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283 int j;
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284 context_sha256_T ctx;
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285
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286 sha256_self_test();
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287
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288 sha256_start(&ctx);
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289 sha256_update(&ctx, buf, buf_len);
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290 if (salt != NULL)
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291 sha256_update(&ctx, salt, salt_len);
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292 sha256_finish(&ctx, sha256sum);
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293 for (j = 0; j < 32; j++)
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294 sprintf((char *)hexit + j * 2, "%02x", sha256sum[j]);
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295 hexit[sizeof(hexit) - 1] = '\0';
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296 return hexit;
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297 }
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298
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299 /*
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300 * Returns sha256(buf) as 64 hex chars in static array.
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301 */
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302 char_u *
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303 sha256_key(
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304 char_u *buf,
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305 char_u *salt,
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306 int salt_len)
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307 {
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308 /* No passwd means don't encrypt */
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309 if (buf == NULL || *buf == NUL)
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310 return (char_u *)"";
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311
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312 return sha256_bytes(buf, (int)STRLEN(buf), salt, salt_len);
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313 }
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314
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315 /*
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316 * These are the standard FIPS-180-2 test vectors
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317 */
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318
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319 static char *sha_self_test_msg[] = {
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320 "abc",
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321 "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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322 NULL
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323 };
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324
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325 static char *sha_self_test_vector[] = {
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326 "ba7816bf8f01cfea414140de5dae2223" \
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327 "b00361a396177a9cb410ff61f20015ad",
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328 "248d6a61d20638b8e5c026930c3e6039" \
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329 "a33ce45964ff2167f6ecedd419db06c1",
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330 "cdc76e5c9914fb9281a1c7e284d73e67" \
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331 "f1809a48a497200e046d39ccc7112cd0"
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332 };
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333
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334 /*
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335 * Perform a test on the SHA256 algorithm.
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336 * Return FAIL or OK.
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337 */
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338 int
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339 sha256_self_test(void)
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340 {
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341 int i, j;
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342 char output[65];
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343 context_sha256_T ctx;
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344 char_u buf[1000];
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345 char_u sha256sum[32];
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346 static int failures = 0;
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347 char_u *hexit;
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348 static int sha256_self_tested = 0;
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349
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350 if (sha256_self_tested > 0)
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351 return failures > 0 ? FAIL : OK;
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352 sha256_self_tested = 1;
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353
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354 for (i = 0; i < 3; i++)
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355 {
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356 if (i < 2)
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357 {
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358 hexit = sha256_bytes((char_u *)sha_self_test_msg[i],
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359 (int)STRLEN(sha_self_test_msg[i]),
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360 NULL, 0);
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361 STRCPY(output, hexit);
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362 }
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363 else
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364 {
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365 sha256_start(&ctx);
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366 vim_memset(buf, 'a', 1000);
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367 for (j = 0; j < 1000; j++)
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368 sha256_update(&ctx, (char_u *)buf, 1000);
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369 sha256_finish(&ctx, sha256sum);
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370 for (j = 0; j < 32; j++)
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371 sprintf(output + j * 2, "%02x", sha256sum[j]);
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372 }
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373 if (memcmp(output, sha_self_test_vector[i], 64))
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374 {
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375 failures++;
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376 output[sizeof(output) - 1] = '\0';
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377 /* printf("sha256_self_test %d failed %s\n", i, output); */
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378 }
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379 }
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380 return failures > 0 ? FAIL : OK;
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381 }
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382
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383 static unsigned int
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384 get_some_time(void)
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385 {
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386 # ifdef HAVE_GETTIMEOFDAY
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387 struct timeval tv;
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388
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389 /* Using usec makes it less predictable. */
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390 gettimeofday(&tv, NULL);
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391 return (unsigned int)(tv.tv_sec + tv.tv_usec);
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392 # else
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393 return (unsigned int)time(NULL);
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394 # endif
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395 }
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396
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397 /*
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398 * Fill "header[header_len]" with random_data.
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399 * Also "salt[salt_len]" when "salt" is not NULL.
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400 */
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401 void
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402 sha2_seed(
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403 char_u *header,
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404 int header_len,
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405 char_u *salt,
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406 int salt_len)
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407 {
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408 int i;
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409 static char_u random_data[1000];
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410 char_u sha256sum[32];
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411 context_sha256_T ctx;
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412
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413 srand(get_some_time());
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414
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415 for (i = 0; i < (int)sizeof(random_data) - 1; i++)
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416 random_data[i] = (char_u)((get_some_time() ^ rand()) & 0xff);
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417 sha256_start(&ctx);
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418 sha256_update(&ctx, (char_u *)random_data, sizeof(random_data));
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419 sha256_finish(&ctx, sha256sum);
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420
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421 /* put first block into header. */
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422 for (i = 0; i < header_len; i++)
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423 header[i] = sha256sum[i % sizeof(sha256sum)];
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424
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425 /* put remaining block into salt. */
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426 if (salt != NULL)
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427 for (i = 0; i < salt_len; i++)
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428 salt[i] = sha256sum[(i + header_len) % sizeof(sha256sum)];
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429 }
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430
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431 #endif /* FEAT_CRYPT */