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annotate src/core/ngx_crypt.c @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents 1064ea81ed3a
children
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1
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2 /*
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3 * Copyright (C) Maxim Dounin
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4 */
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5
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_crypt.h>
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10 #include <ngx_md5.h>
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11 #include <ngx_sha1.h>
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13
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14 #if (NGX_CRYPT)
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15
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16 static ngx_int_t ngx_crypt_apr1(ngx_pool_t *pool, u_char *key, u_char *salt,
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17 u_char **encrypted);
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18 static ngx_int_t ngx_crypt_plain(ngx_pool_t *pool, u_char *key, u_char *salt,
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19 u_char **encrypted);
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20 static ngx_int_t ngx_crypt_ssha(ngx_pool_t *pool, u_char *key, u_char *salt,
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21 u_char **encrypted);
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22 static ngx_int_t ngx_crypt_sha(ngx_pool_t *pool, u_char *key, u_char *salt,
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23 u_char **encrypted);
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26 static u_char *ngx_crypt_to64(u_char *p, uint32_t v, size_t n);
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29 ngx_int_t
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30 ngx_crypt(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
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31 {
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32 if (ngx_strncmp(salt, "$apr1$", sizeof("$apr1$") - 1) == 0) {
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33 return ngx_crypt_apr1(pool, key, salt, encrypted);
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35 } else if (ngx_strncmp(salt, "{PLAIN}", sizeof("{PLAIN}") - 1) == 0) {
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36 return ngx_crypt_plain(pool, key, salt, encrypted);
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38 } else if (ngx_strncmp(salt, "{SSHA}", sizeof("{SSHA}") - 1) == 0) {
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39 return ngx_crypt_ssha(pool, key, salt, encrypted);
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41 } else if (ngx_strncmp(salt, "{SHA}", sizeof("{SHA}") - 1) == 0) {
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42 return ngx_crypt_sha(pool, key, salt, encrypted);
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43 }
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45 /* fallback to libc crypt() */
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46
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47 return ngx_libc_crypt(pool, key, salt, encrypted);
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48 }
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51 static ngx_int_t
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52 ngx_crypt_apr1(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
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53 {
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54 ngx_int_t n;
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55 ngx_uint_t i;
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56 u_char *p, *last, final[16];
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57 size_t saltlen, keylen;
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58 ngx_md5_t md5, ctx1;
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59
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60 /* Apache's apr1 crypt is Poul-Henning Kamp's md5 crypt with $apr1$ magic */
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61
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62 keylen = ngx_strlen(key);
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64 /* true salt: no magic, max 8 chars, stop at first $ */
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66 salt += sizeof("$apr1$") - 1;
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67 last = salt + 8;
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68 for (p = salt; *p && *p != '$' && p < last; p++) { /* void */ }
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69 saltlen = p - salt;
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71 /* hash key and salt */
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72
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73 ngx_md5_init(&md5);
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74 ngx_md5_update(&md5, key, keylen);
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75 ngx_md5_update(&md5, (u_char *) "$apr1$", sizeof("$apr1$") - 1);
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76 ngx_md5_update(&md5, salt, saltlen);
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77
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78 ngx_md5_init(&ctx1);
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79 ngx_md5_update(&ctx1, key, keylen);
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80 ngx_md5_update(&ctx1, salt, saltlen);
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81 ngx_md5_update(&ctx1, key, keylen);
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82 ngx_md5_final(final, &ctx1);
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83
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84 for (n = keylen; n > 0; n -= 16) {
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85 ngx_md5_update(&md5, final, n > 16 ? 16 : n);
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86 }
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87
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88 ngx_memzero(final, sizeof(final));
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89
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90 for (i = keylen; i; i >>= 1) {
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91 if (i & 1) {
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92 ngx_md5_update(&md5, final, 1);
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93
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94 } else {
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95 ngx_md5_update(&md5, key, 1);
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96 }
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97 }
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98
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99 ngx_md5_final(final, &md5);
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100
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101 for (i = 0; i < 1000; i++) {
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102 ngx_md5_init(&ctx1);
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103
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104 if (i & 1) {
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105 ngx_md5_update(&ctx1, key, keylen);
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106
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107 } else {
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108 ngx_md5_update(&ctx1, final, 16);
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109 }
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110
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111 if (i % 3) {
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112 ngx_md5_update(&ctx1, salt, saltlen);
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113 }
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114
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115 if (i % 7) {
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116 ngx_md5_update(&ctx1, key, keylen);
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117 }
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118
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119 if (i & 1) {
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120 ngx_md5_update(&ctx1, final, 16);
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121
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122 } else {
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123 ngx_md5_update(&ctx1, key, keylen);
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124 }
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125
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126 ngx_md5_final(final, &ctx1);
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127 }
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128
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129 /* output */
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130
5386
2d947c2e3ea1 Core: fix misallocation at ngx_crypt_apr1 (ticket #412).
Markus Linnala <Markus.Linnala@cybercom.com>
parents: 5034
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131 *encrypted = ngx_pnalloc(pool, sizeof("$apr1$") - 1 + saltlen + 1 + 22 + 1);
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132 if (*encrypted == NULL) {
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133 return NGX_ERROR;
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134 }
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135
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136 p = ngx_cpymem(*encrypted, "$apr1$", sizeof("$apr1$") - 1);
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137 p = ngx_copy(p, salt, saltlen);
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138 *p++ = '$';
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139
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140 p = ngx_crypt_to64(p, (final[ 0]<<16) | (final[ 6]<<8) | final[12], 4);
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141 p = ngx_crypt_to64(p, (final[ 1]<<16) | (final[ 7]<<8) | final[13], 4);
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142 p = ngx_crypt_to64(p, (final[ 2]<<16) | (final[ 8]<<8) | final[14], 4);
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143 p = ngx_crypt_to64(p, (final[ 3]<<16) | (final[ 9]<<8) | final[15], 4);
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144 p = ngx_crypt_to64(p, (final[ 4]<<16) | (final[10]<<8) | final[ 5], 4);
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145 p = ngx_crypt_to64(p, final[11], 2);
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146 *p = '\0';
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147
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148 return NGX_OK;
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149 }
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150
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151
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152 static u_char *
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153 ngx_crypt_to64(u_char *p, uint32_t v, size_t n)
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154 {
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155 static u_char itoa64[] =
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156 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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157
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158 while (n--) {
6474
Ruslan Ermilov <ru@nginx.com>
parents: 5924
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159 *p++ = itoa64[v & 0x3f];
Ruslan Ermilov <ru@nginx.com>
parents: 5924
diff changeset
160 v >>= 6;
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161 }
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162
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163 return p;
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164 }
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165
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166
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167 static ngx_int_t
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168 ngx_crypt_plain(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
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169 {
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170 size_t len;
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171 u_char *p;
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172
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173 len = ngx_strlen(key);
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174
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175 *encrypted = ngx_pnalloc(pool, sizeof("{PLAIN}") - 1 + len + 1);
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176 if (*encrypted == NULL) {
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177 return NGX_ERROR;
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178 }
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179
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180 p = ngx_cpymem(*encrypted, "{PLAIN}", sizeof("{PLAIN}") - 1);
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181 ngx_memcpy(p, key, len + 1);
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182
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183 return NGX_OK;
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184 }
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185
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186
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187 static ngx_int_t
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188 ngx_crypt_ssha(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
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189 {
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190 size_t len;
4815
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4759
diff changeset
191 ngx_int_t rc;
3922
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192 ngx_str_t encoded, decoded;
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193 ngx_sha1_t sha1;
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194
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195 /* "{SSHA}" base64(SHA1(key salt) salt) */
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196
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197 /* decode base64 salt to find out true salt */
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198
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199 encoded.data = salt + sizeof("{SSHA}") - 1;
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200 encoded.len = ngx_strlen(encoded.data);
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201
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Maxim Dounin <mdounin@mdounin.ru>
parents: 4759
diff changeset
202 len = ngx_max(ngx_base64_decoded_length(encoded.len), 20);
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4759
diff changeset
203
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4759
diff changeset
204 decoded.data = ngx_pnalloc(pool, len);
3922
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205 if (decoded.data == NULL) {
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206 return NGX_ERROR;
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diff changeset
207 }
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208
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Maxim Dounin <mdounin@mdounin.ru>
parents: 4759
diff changeset
209 rc = ngx_decode_base64(&decoded, &encoded);
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
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parents: 4759
diff changeset
210
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
Maxim Dounin <mdounin@mdounin.ru>
parents: 4759
diff changeset
211 if (rc != NGX_OK || decoded.len < 20) {
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
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parents: 4759
diff changeset
212 decoded.len = 20;
63dff7943fc7 Crypt: fixed handling of corrupted SSHA entries in password file.
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diff changeset
213 }
3922
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214
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215 /* update SHA1 from key and salt */
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216
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217 ngx_sha1_init(&sha1);
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218 ngx_sha1_update(&sha1, key, ngx_strlen(key));
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diff changeset
219 ngx_sha1_update(&sha1, decoded.data + 20, decoded.len - 20);
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diff changeset
220 ngx_sha1_final(decoded.data, &sha1);
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diff changeset
221
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diff changeset
222 /* encode it back to base64 */
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223
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224 len = sizeof("{SSHA}") - 1 + ngx_base64_encoded_length(decoded.len) + 1;
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225
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226 *encrypted = ngx_pnalloc(pool, len);
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227 if (*encrypted == NULL) {
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228 return NGX_ERROR;
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diff changeset
229 }
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diff changeset
230
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diff changeset
231 encoded.data = ngx_cpymem(*encrypted, "{SSHA}", sizeof("{SSHA}") - 1);
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232 ngx_encode_base64(&encoded, &decoded);
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233 encoded.data[encoded.len] = '\0';
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234
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235 return NGX_OK;
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236 }
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237
5034
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238
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239 static ngx_int_t
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240 ngx_crypt_sha(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted)
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241 {
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242 size_t len;
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243 ngx_str_t encoded, decoded;
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244 ngx_sha1_t sha1;
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245 u_char digest[20];
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246
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247 /* "{SHA}" base64(SHA1(key)) */
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248
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249 decoded.len = sizeof(digest);
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250 decoded.data = digest;
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251
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252 ngx_sha1_init(&sha1);
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253 ngx_sha1_update(&sha1, key, ngx_strlen(key));
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254 ngx_sha1_final(digest, &sha1);
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255
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parents: 4815
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256 len = sizeof("{SHA}") - 1 + ngx_base64_encoded_length(decoded.len) + 1;
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257
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258 *encrypted = ngx_pnalloc(pool, len);
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259 if (*encrypted == NULL) {
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260 return NGX_ERROR;
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261 }
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262
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263 encoded.data = ngx_cpymem(*encrypted, "{SHA}", sizeof("{SHA}") - 1);
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264 ngx_encode_base64(&encoded, &decoded);
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265 encoded.data[encoded.len] = '\0';
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266
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267 return NGX_OK;
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268 }
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269
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14622ee4fa08 fix building --without-http_auth_basic_module,
Igor Sysoev <igor@sysoev.ru>
parents: 3922
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270 #endif /* NGX_CRYPT */