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52
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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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_http.h>
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10
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11
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12 #define NGX_HTTP_AUTH_BUF_SIZE 2048
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13
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14
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15 typedef struct {
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16 ngx_str_t passwd;
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17 } ngx_http_auth_basic_ctx_t;
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18
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19
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20 typedef struct {
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21 ngx_str_t realm;
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22 ngx_str_t user_file;
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23 } ngx_http_auth_basic_loc_conf_t;
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24
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25
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26 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r);
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27 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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28 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm);
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29 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r,
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30 ngx_str_t *realm);
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31 static void ngx_http_auth_basic_close(ngx_file_t *file);
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32 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf);
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33 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf,
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34 void *parent, void *child);
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230
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35 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf);
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52
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36 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data);
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37
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38
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39 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic;
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40
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41 static ngx_command_t ngx_http_auth_basic_commands[] = {
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42
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43 { ngx_string("auth_basic"),
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180
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44 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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45 |NGX_CONF_TAKE1,
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52
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46 ngx_conf_set_str_slot,
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47 NGX_HTTP_LOC_CONF_OFFSET,
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48 offsetof(ngx_http_auth_basic_loc_conf_t, realm),
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49 &ngx_http_auth_basic_p },
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50
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51 { ngx_string("auth_basic_user_file"),
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180
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52 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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53 |NGX_CONF_TAKE1,
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52
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54 ngx_conf_set_str_slot,
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55 NGX_HTTP_LOC_CONF_OFFSET,
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56 offsetof(ngx_http_auth_basic_loc_conf_t, user_file),
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57 NULL },
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58
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59 ngx_null_command
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60 };
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61
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62
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216
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63 static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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58
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64 NULL, /* preconfiguration */
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230
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65 ngx_http_auth_basic_init, /* postconfiguration */
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52
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66
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67 NULL, /* create main configuration */
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68 NULL, /* init main configuration */
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69
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70 NULL, /* create server configuration */
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71 NULL, /* merge server configuration */
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72
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73 ngx_http_auth_basic_create_loc_conf, /* create location configuration */
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74 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */
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75 };
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76
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77
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78 ngx_module_t ngx_http_auth_basic_module = {
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58
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79 NGX_MODULE_V1,
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80 &ngx_http_auth_basic_module_ctx, /* module context */
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81 ngx_http_auth_basic_commands, /* module directives */
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82 NGX_HTTP_MODULE, /* module type */
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90
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83 NULL, /* init master */
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230
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84 NULL, /* init module */
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90
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85 NULL, /* init process */
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86 NULL, /* init thread */
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87 NULL, /* exit thread */
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88 NULL, /* exit process */
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89 NULL, /* exit master */
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90 NGX_MODULE_V1_PADDING
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52
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91 };
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92
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93
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94 static ngx_int_t
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95 ngx_http_auth_basic_handler(ngx_http_request_t *r)
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96 {
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97 off_t offset;
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98 ssize_t n;
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99 ngx_fd_t fd;
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88
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100 ngx_int_t rc;
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101 ngx_str_t pwd;
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102 ngx_uint_t i, login, left, passwd;
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52
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103 ngx_file_t file;
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104 ngx_http_auth_basic_ctx_t *ctx;
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105 ngx_http_auth_basic_loc_conf_t *alcf;
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106 u_char buf[NGX_HTTP_AUTH_BUF_SIZE];
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107 enum {
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108 sw_login,
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109 sw_passwd,
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110 sw_skip
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111 } state;
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112
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113 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module);
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114
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115 if (alcf->realm.len == 0 || alcf->user_file.len == 0) {
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358
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116 return NGX_DECLINED;
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52
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117 }
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118
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119 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module);
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120
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121 if (ctx) {
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122 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd,
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123 &alcf->realm);
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124 }
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125
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88
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126 rc = ngx_http_auth_basic_user(r);
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52
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127
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88
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128 if (rc == NGX_DECLINED) {
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452
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129
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130 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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131 "no user/password was provided for basic authentication");
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132
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133 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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134 }
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135
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88
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136 if (rc == NGX_ERROR) {
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52
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137 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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138 }
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139
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276
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140 fd = ngx_open_file(alcf->user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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52
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141
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142 if (fd == NGX_INVALID_FILE) {
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212
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143 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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52
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144 ngx_open_file_n " \"%s\" failed", alcf->user_file.data);
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145 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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146 }
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147
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148 ngx_memzero(&file, sizeof(ngx_file_t));
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149
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150 file.fd = fd;
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151 file.name = alcf->user_file;
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152 file.log = r->connection->log;
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153
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154 state = sw_login;
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155 passwd = 0;
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156 login = 0;
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157 left = 0;
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158 offset = 0;
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159
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160 for ( ;; ) {
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262
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161 i = left;
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162
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163 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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164 offset);
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165
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166 if (n == NGX_ERROR) {
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167 ngx_http_auth_basic_close(&file);
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168 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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169 }
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170
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171 if (n == 0) {
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172 break;
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173 }
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174
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175 for (i = left; i < left + n; i++) {
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176 switch (state) {
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177
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178 case sw_login:
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452
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179 if (login == 0) {
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180
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181 if (buf[i] == '#' || buf[i] == CR) {
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182 state = sw_skip;
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183 break;
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184 }
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185
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186 if (buf[i] == LF) {
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187 break;
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188 }
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52
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189 }
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190
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88
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191 if (buf[i] != r->headers_in.user.data[login]) {
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192 state = sw_skip;
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193 break;
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194 }
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195
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88
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196 if (login == r->headers_in.user.len) {
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197 state = sw_passwd;
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198 passwd = i + 1;
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199 }
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200
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201 login++;
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202
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203 break;
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204
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205 case sw_passwd:
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206 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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207 buf[i] = '\0';
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208
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209 ngx_http_auth_basic_close(&file);
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210
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211 pwd.len = i - passwd;
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212 pwd.data = &buf[passwd];
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213
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214 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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215 &alcf->realm);
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216 }
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217
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218 break;
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219
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220 case sw_skip:
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221 if (buf[i] == LF) {
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222 state = sw_login;
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223 login = 0;
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224 }
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225
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226 break;
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227 }
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228 }
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229
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230 if (state == sw_passwd) {
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231 left = left + n - passwd;
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232 ngx_memcpy(buf, &buf[passwd], left);
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233 passwd = 0;
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234
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235 } else {
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236 left = 0;
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237 }
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238
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239 offset += n;
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240 }
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241
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242 ngx_http_auth_basic_close(&file);
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243
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262
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244 if (state == sw_passwd) {
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245 pwd.len = i - passwd;
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382
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246 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1);
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262
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247 if (pwd.data == NULL) {
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248 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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249 }
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250
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251 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1);
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252
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253 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm);
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254 }
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255
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452
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256 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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257 "user \"%V\" was not found in \"%V\"",
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258 &r->headers_in.user, &alcf->user_file);
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259
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52
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260 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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261 }
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262
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263
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264 static ngx_int_t
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265 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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266 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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267 {
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268 ngx_int_t rc;
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269 u_char *encrypted;
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270
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271 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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272 &encrypted);
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273
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274 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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452
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275 "rc: %d user: \"%V\" salt: \"%s\"",
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276 rc, &r->headers_in.user, passwd->data);
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52
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277
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278 if (rc == NGX_OK) {
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279 if (ngx_strcmp(encrypted, passwd->data) == 0) {
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280 return NGX_OK;
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281 }
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282
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283 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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284 "encrypted: \"%s\"", encrypted);
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285
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452
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286 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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287 "user \"%V\": password mismatch",
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288 &r->headers_in.user);
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289
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290 return ngx_http_auth_basic_set_realm(r, realm);
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291 }
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292
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293 if (rc == NGX_ERROR) {
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294 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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295 }
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296
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297 /* rc == NGX_AGAIN */
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298
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299 if (ctx == NULL) {
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300 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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301 if (ctx == NULL) {
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302 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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303 }
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304
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305 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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306
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307 ctx->passwd.len = passwd->len;
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308 passwd->len++;
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309
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310 ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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311 if (ctx->passwd.data == NULL) {
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312 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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313 }
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314
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315 }
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316
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317 /* TODO: add mutex event */
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318
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319 return rc;
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320 }
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321
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322
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323 static ngx_int_t
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324 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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325 {
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326 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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327 if (r->headers_out.www_authenticate == NULL) {
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328 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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329 }
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330
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58
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331 r->headers_out.www_authenticate->hash = 1;
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52
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332 r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1;
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333 r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate";
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334 r->headers_out.www_authenticate->value = *realm;
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335
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336 return NGX_HTTP_UNAUTHORIZED;
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337 }
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338
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339 static void
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340 ngx_http_auth_basic_close(ngx_file_t *file)
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341 {
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342 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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343 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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344 ngx_close_file_n " \"%s\" failed", file->name.data);
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345 }
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346 }
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347
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348
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349 static void *
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350 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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351 {
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352 ngx_http_auth_basic_loc_conf_t *conf;
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353
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354 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
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355 if (conf == NULL) {
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356 return NGX_CONF_ERROR;
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357 }
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358
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359 return conf;
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360 }
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361
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362
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363 static char *
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364 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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365 {
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366 ngx_http_auth_basic_loc_conf_t *prev = parent;
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367 ngx_http_auth_basic_loc_conf_t *conf = child;
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368
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130
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369 if (conf->realm.data == NULL) {
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52
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370 conf->realm = prev->realm;
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371 }
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372
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373 if (conf->user_file.data) {
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324
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374 if (ngx_conf_full_name(cf->cycle, &conf->user_file, 1) != NGX_OK) {
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52
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375 return NGX_CONF_ERROR;
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376 }
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377
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378 } else {
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379 conf->user_file = prev->user_file;
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380 }
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381
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382 return NGX_CONF_OK;
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383 }
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384
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385
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386 static ngx_int_t
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230
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387 ngx_http_auth_basic_init(ngx_conf_t *cf)
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52
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388 {
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389 ngx_http_handler_pt *h;
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390 ngx_http_core_main_conf_t *cmcf;
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391
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230
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392 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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52
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393
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394 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
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395 if (h == NULL) {
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|
396 return NGX_ERROR;
|
|
|
397 }
|
|
|
398
|
|
|
399 *h = ngx_http_auth_basic_handler;
|
|
|
400
|
|
|
401 return NGX_OK;
|
|
|
402 }
|
|
|
403
|
|
|
404
|
|
|
405 static char *
|
|
|
406 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data)
|
|
|
407 {
|
|
|
408 ngx_str_t *realm = data;
|
|
|
409
|
|
130
|
410 size_t len;
|
|
|
411 u_char *basic, *p;
|
|
|
412
|
|
52
|
413 if (ngx_strcmp(realm->data, "off") == 0) {
|
|
|
414 realm->len = 0;
|
|
|
415 realm->data = (u_char *) "";
|
|
132
|
416
|
|
|
417 return NGX_CONF_OK;
|
|
52
|
418 }
|
|
|
419
|
|
130
|
420 len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
|
|
|
421
|
|
382
|
422 basic = ngx_pnalloc(cf->pool, len);
|
|
130
|
423 if (basic == NULL) {
|
|
|
424 return NGX_CONF_ERROR;
|
|
|
425 }
|
|
|
426
|
|
|
427 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
|
|
|
428 p = ngx_cpymem(p, realm->data, realm->len);
|
|
|
429 *p = '"';
|
|
|
430
|
|
|
431 realm->len = len;
|
|
|
432 realm->data = basic;
|
|
|
433
|
|
52
|
434 return NGX_CONF_OK;
|
|
|
435 }
|
