Mercurial > hg > nginx-quic
annotate src/core/ngx_crypt.c @ 6133:af7eba90645d
Win32: shared memory base addresses and remapping.
Two mechanisms are implemented to make it possible to store pointers
in shared memory on Windows, in particular on Windows Vista and later
versions with ASLR:
- The ngx_shm_remap() function added to allow remapping of a shared memory
zone to the address originally used for it in the master process. While
important, it doesn't solve the problem by itself as in many cases it's
not possible to use the address because of conflicts with other
allocations.
- We now create mappings at the same address in all processes by starting
mappings at predefined addresses normally unused by newborn processes.
These two mechanisms combined allow to use shared memory on Windows
almost without problems, including reloads.
Based on the patch by Sergey Brester:
http://mailman.nginx.org/pipermail/nginx-devel/2015-April/006836.html
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 27 Apr 2015 18:25:42 +0300 |
parents | 58956c644ad0 |
children | 2cd019520210 |
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 #if (NGX_HAVE_SHA1) |
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12 #include <ngx_sha1.h> |
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13 #endif |
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14 |
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15 |
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16 #if (NGX_CRYPT) |
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18 static ngx_int_t ngx_crypt_apr1(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_plain(ngx_pool_t *pool, u_char *key, u_char *salt, |
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21 u_char **encrypted); |
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23 #if (NGX_HAVE_SHA1) |
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24 |
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25 static ngx_int_t ngx_crypt_ssha(ngx_pool_t *pool, u_char *key, u_char *salt, |
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26 u_char **encrypted); |
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27 static ngx_int_t ngx_crypt_sha(ngx_pool_t *pool, u_char *key, u_char *salt, |
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28 u_char **encrypted); |
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29 |
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30 #endif |
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32 |
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33 static u_char *ngx_crypt_to64(u_char *p, uint32_t v, size_t n); |
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34 |
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35 |
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36 ngx_int_t |
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37 ngx_crypt(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted) |
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38 { |
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39 if (ngx_strncmp(salt, "$apr1$", sizeof("$apr1$") - 1) == 0) { |
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40 return ngx_crypt_apr1(pool, key, salt, encrypted); |
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41 |
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42 } else if (ngx_strncmp(salt, "{PLAIN}", sizeof("{PLAIN}") - 1) == 0) { |
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43 return ngx_crypt_plain(pool, key, salt, encrypted); |
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44 |
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45 #if (NGX_HAVE_SHA1) |
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46 } else if (ngx_strncmp(salt, "{SSHA}", sizeof("{SSHA}") - 1) == 0) { |
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47 return ngx_crypt_ssha(pool, key, salt, encrypted); |
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48 |
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49 } else if (ngx_strncmp(salt, "{SHA}", sizeof("{SHA}") - 1) == 0) { |
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50 return ngx_crypt_sha(pool, key, salt, encrypted); |
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51 #endif |
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52 } |
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53 |
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54 /* fallback to libc crypt() */ |
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55 |
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56 return ngx_libc_crypt(pool, key, salt, encrypted); |
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57 } |
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58 |
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59 |
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60 static ngx_int_t |
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61 ngx_crypt_apr1(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted) |
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62 { |
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63 ngx_int_t n; |
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64 ngx_uint_t i; |
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65 u_char *p, *last, final[16]; |
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66 size_t saltlen, keylen; |
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67 ngx_md5_t md5, ctx1; |
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68 |
5924 | 69 /* Apache's apr1 crypt is Poul-Henning Kamp's md5 crypt with $apr1$ magic */ |
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70 |
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71 keylen = ngx_strlen(key); |
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72 |
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73 /* true salt: no magic, max 8 chars, stop at first $ */ |
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74 |
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75 salt += sizeof("$apr1$") - 1; |
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76 last = salt + 8; |
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77 for (p = salt; *p && *p != '$' && p < last; p++) { /* void */ } |
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78 saltlen = p - salt; |
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79 |
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80 /* hash key and salt */ |
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81 |
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82 ngx_md5_init(&md5); |
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83 ngx_md5_update(&md5, key, keylen); |
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84 ngx_md5_update(&md5, (u_char *) "$apr1$", sizeof("$apr1$") - 1); |
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85 ngx_md5_update(&md5, salt, saltlen); |
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86 |
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87 ngx_md5_init(&ctx1); |
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88 ngx_md5_update(&ctx1, key, keylen); |
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89 ngx_md5_update(&ctx1, salt, saltlen); |
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90 ngx_md5_update(&ctx1, key, keylen); |
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91 ngx_md5_final(final, &ctx1); |
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92 |
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93 for (n = keylen; n > 0; n -= 16) { |
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94 ngx_md5_update(&md5, final, n > 16 ? 16 : n); |
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95 } |
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96 |
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97 ngx_memzero(final, sizeof(final)); |
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98 |
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99 for (i = keylen; i; i >>= 1) { |
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100 if (i & 1) { |
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101 ngx_md5_update(&md5, final, 1); |
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102 |
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103 } else { |
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104 ngx_md5_update(&md5, key, 1); |
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105 } |
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106 } |
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107 |
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108 ngx_md5_final(final, &md5); |
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109 |
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110 for (i = 0; i < 1000; i++) { |
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111 ngx_md5_init(&ctx1); |
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112 |
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113 if (i & 1) { |
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114 ngx_md5_update(&ctx1, key, keylen); |
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115 |
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116 } else { |
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117 ngx_md5_update(&ctx1, final, 16); |
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118 } |
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119 |
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120 if (i % 3) { |
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121 ngx_md5_update(&ctx1, salt, saltlen); |
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122 } |
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123 |
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124 if (i % 7) { |
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125 ngx_md5_update(&ctx1, key, keylen); |
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126 } |
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127 |
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128 if (i & 1) { |
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129 ngx_md5_update(&ctx1, final, 16); |
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130 |
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131 } else { |
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132 ngx_md5_update(&ctx1, key, keylen); |
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133 } |
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134 |
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135 ngx_md5_final(final, &ctx1); |
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136 } |
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137 |
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138 /* output */ |
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139 |
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140 *encrypted = ngx_pnalloc(pool, sizeof("$apr1$") - 1 + saltlen + 1 + 22 + 1); |
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141 if (*encrypted == NULL) { |
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142 return NGX_ERROR; |
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143 } |
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144 |
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145 p = ngx_cpymem(*encrypted, "$apr1$", sizeof("$apr1$") - 1); |
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146 p = ngx_copy(p, salt, saltlen); |
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147 *p++ = '$'; |
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148 |
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149 p = ngx_crypt_to64(p, (final[ 0]<<16) | (final[ 6]<<8) | final[12], 4); |
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150 p = ngx_crypt_to64(p, (final[ 1]<<16) | (final[ 7]<<8) | final[13], 4); |
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151 p = ngx_crypt_to64(p, (final[ 2]<<16) | (final[ 8]<<8) | final[14], 4); |
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152 p = ngx_crypt_to64(p, (final[ 3]<<16) | (final[ 9]<<8) | final[15], 4); |
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153 p = ngx_crypt_to64(p, (final[ 4]<<16) | (final[10]<<8) | final[ 5], 4); |
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154 p = ngx_crypt_to64(p, final[11], 2); |
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155 *p = '\0'; |
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156 |
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157 return NGX_OK; |
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158 } |
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159 |
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160 |
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161 static u_char * |
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162 ngx_crypt_to64(u_char *p, uint32_t v, size_t n) |
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163 { |
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164 static u_char itoa64[] = |
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165 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; |
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166 |
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167 while (n--) { |
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168 *p++ = itoa64[v & 0x3f]; |
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169 v >>= 6; |
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170 } |
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171 |
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172 return p; |
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173 } |
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174 |
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175 |
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176 static ngx_int_t |
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177 ngx_crypt_plain(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted) |
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178 { |
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179 size_t len; |
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180 u_char *p; |
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181 |
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182 len = ngx_strlen(key); |
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183 |
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184 *encrypted = ngx_pnalloc(pool, sizeof("{PLAIN}") - 1 + len + 1); |
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185 if (*encrypted == NULL) { |
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186 return NGX_ERROR; |
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187 } |
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188 |
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189 p = ngx_cpymem(*encrypted, "{PLAIN}", sizeof("{PLAIN}") - 1); |
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190 ngx_memcpy(p, key, len + 1); |
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191 |
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192 return NGX_OK; |
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193 } |
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194 |
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195 |
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196 #if (NGX_HAVE_SHA1) |
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197 |
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198 static ngx_int_t |
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199 ngx_crypt_ssha(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted) |
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200 { |
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201 size_t len; |
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202 ngx_int_t rc; |
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203 ngx_str_t encoded, decoded; |
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204 ngx_sha1_t sha1; |
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205 |
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206 /* "{SSHA}" base64(SHA1(key salt) salt) */ |
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207 |
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208 /* decode base64 salt to find out true salt */ |
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209 |
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210 encoded.data = salt + sizeof("{SSHA}") - 1; |
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211 encoded.len = ngx_strlen(encoded.data); |
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212 |
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213 len = ngx_max(ngx_base64_decoded_length(encoded.len), 20); |
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214 |
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215 decoded.data = ngx_pnalloc(pool, len); |
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216 if (decoded.data == NULL) { |
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217 return NGX_ERROR; |
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218 } |
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219 |
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220 rc = ngx_decode_base64(&decoded, &encoded); |
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221 |
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222 if (rc != NGX_OK || decoded.len < 20) { |
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223 decoded.len = 20; |
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224 } |
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225 |
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226 /* update SHA1 from key and salt */ |
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227 |
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228 ngx_sha1_init(&sha1); |
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229 ngx_sha1_update(&sha1, key, ngx_strlen(key)); |
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230 ngx_sha1_update(&sha1, decoded.data + 20, decoded.len - 20); |
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231 ngx_sha1_final(decoded.data, &sha1); |
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232 |
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233 /* encode it back to base64 */ |
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234 |
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235 len = sizeof("{SSHA}") - 1 + ngx_base64_encoded_length(decoded.len) + 1; |
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236 |
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237 *encrypted = ngx_pnalloc(pool, len); |
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238 if (*encrypted == NULL) { |
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239 return NGX_ERROR; |
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240 } |
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241 |
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242 encoded.data = ngx_cpymem(*encrypted, "{SSHA}", sizeof("{SSHA}") - 1); |
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243 ngx_encode_base64(&encoded, &decoded); |
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244 encoded.data[encoded.len] = '\0'; |
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245 |
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246 return NGX_OK; |
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247 } |
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248 |
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249 |
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250 static ngx_int_t |
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251 ngx_crypt_sha(ngx_pool_t *pool, u_char *key, u_char *salt, u_char **encrypted) |
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252 { |
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253 size_t len; |
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254 ngx_str_t encoded, decoded; |
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255 ngx_sha1_t sha1; |
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256 u_char digest[20]; |
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257 |
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258 /* "{SHA}" base64(SHA1(key)) */ |
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259 |
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260 decoded.len = sizeof(digest); |
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261 decoded.data = digest; |
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262 |
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263 ngx_sha1_init(&sha1); |
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264 ngx_sha1_update(&sha1, key, ngx_strlen(key)); |
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265 ngx_sha1_final(digest, &sha1); |
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266 |
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267 len = sizeof("{SHA}") - 1 + ngx_base64_encoded_length(decoded.len) + 1; |
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268 |
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269 *encrypted = ngx_pnalloc(pool, len); |
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270 if (*encrypted == NULL) { |
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271 return NGX_ERROR; |
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272 } |
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273 |
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274 encoded.data = ngx_cpymem(*encrypted, "{SHA}", sizeof("{SHA}") - 1); |
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275 ngx_encode_base64(&encoded, &decoded); |
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276 encoded.data[encoded.len] = '\0'; |
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277 |
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278 return NGX_OK; |
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279 } |
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280 |
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281 #endif /* NGX_HAVE_SHA1 */ |
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282 |
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283 #endif /* NGX_CRYPT */ |