Mercurial > hg > nginx-quic
annotate src/core/ngx_crypt.c @ 8264:5247461c17e1 quic
QUIC: fixed -Wtype-limits with GCC <= 5 (ticket #2104).
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Tue, 22 Dec 2020 12:04:16 +0300 |
parents | 1064ea81ed3a |
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rev | line source |
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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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6 |
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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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12 |
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13 |
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14 #if (NGX_CRYPT) |
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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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24 |
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25 |
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26 static u_char *ngx_crypt_to64(u_char *p, uint32_t v, size_t n); |
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27 |
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28 |
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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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34 |
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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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37 |
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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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40 |
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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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44 |
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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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49 |
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50 |
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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 |
5924 | 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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63 |
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64 /* true salt: no magic, max 8 chars, stop at first $ */ |
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65 |
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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 != '$' && p < last; p++) { /* void */ } |
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69 saltlen = p - salt; |
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70 |
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71 /* hash key and salt */ |
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72 |
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73 ngx_md5_init(&md5); |
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74 ngx_md5_update(&md5, key, keylen); |
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75 ngx_md5_update(&md5, (u_char *) "$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 |
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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 | 159 *p++ = itoa64[v & 0x3f]; |
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; |
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191 ngx_int_t rc; |
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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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202 len = ngx_max(ngx_base64_decoded_length(encoded.len), 20); |
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203 |
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204 decoded.data = ngx_pnalloc(pool, len); |
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205 if (decoded.data == NULL) { |
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206 return NGX_ERROR; |
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207 } |
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208 |
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209 rc = ngx_decode_base64(&decoded, &encoded); |
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210 |
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211 if (rc != NGX_OK || decoded.len < 20) { |
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212 decoded.len = 20; |
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213 } |
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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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219 ngx_sha1_update(&sha1, decoded.data + 20, decoded.len - 20); |
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220 ngx_sha1_final(decoded.data, &sha1); |
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221 |
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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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229 } |
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230 |
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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 |
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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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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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270 #endif /* NGX_CRYPT */ |