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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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35 static ngx_int_t ngx_http_auth_basic_init(ngx_cycle_t *cycle);
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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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631
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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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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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631
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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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503
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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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667
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63 static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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509
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64 NULL, /* preconfiguration */
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65 NULL, /* postconfiguration */
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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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509
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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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541
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83 NULL, /* init master */
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503
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84 ngx_http_auth_basic_init, /* init module */
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541
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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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503
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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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539
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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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503
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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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116 return NGX_OK;
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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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539
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126 rc = ngx_http_auth_basic_user(r);
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127
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539
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128 if (rc == NGX_DECLINED) {
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129 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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130 }
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131
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539
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132 if (rc == NGX_ERROR) {
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503
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133 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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134 }
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135
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136 fd = ngx_open_file(alcf->user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
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137
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138 if (fd == NGX_INVALID_FILE) {
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139 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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140 ngx_open_file_n " \"%s\" failed", alcf->user_file.data);
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141 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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142 }
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143
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144 ngx_memzero(&file, sizeof(ngx_file_t));
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145
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146 file.fd = fd;
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147 file.name = alcf->user_file;
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148 file.log = r->connection->log;
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149
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150 state = sw_login;
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151 passwd = 0;
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152 login = 0;
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153 left = 0;
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154 offset = 0;
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155
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156 for ( ;; ) {
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157 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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158 offset);
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159
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160 if (n == NGX_ERROR) {
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161 ngx_http_auth_basic_close(&file);
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162 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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163 }
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164
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165 if (n == 0) {
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166 break;
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167 }
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168
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169 for (i = left; i < left + n; i++) {
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170 switch (state) {
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171
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172 case sw_login:
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173 if (login == 0 && buf[i] == '#') {
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174 state = sw_skip;
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175 break;
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176 }
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177
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178 if (buf[i] != r->headers_in.user.data[login]) {
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179 state = sw_skip;
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180 break;
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181 }
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182
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539
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183 if (login == r->headers_in.user.len) {
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184 state = sw_passwd;
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185 passwd = i + 1;
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186 }
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187
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188 login++;
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189
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190 break;
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191
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192 case sw_passwd:
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193 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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194 buf[i] = '\0';
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195
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196 ngx_http_auth_basic_close(&file);
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197
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198 pwd.len = i - passwd;
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199 pwd.data = &buf[passwd];
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200
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201 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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202 &alcf->realm);
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203 }
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204
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205 break;
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206
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207 case sw_skip:
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208 if (buf[i] == LF) {
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209 state = sw_login;
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210 login = 0;
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211 }
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212
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213 break;
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214 }
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215 }
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216
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217 if (state == sw_passwd) {
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218 left = left + n - passwd;
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219 ngx_memcpy(buf, &buf[passwd], left);
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220 passwd = 0;
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221
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222 } else {
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223 left = 0;
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224 }
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225
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226 offset += n;
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227 }
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228
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229 ngx_http_auth_basic_close(&file);
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230
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231 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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232 }
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233
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234
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235 static ngx_int_t
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236 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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237 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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238 {
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239 ngx_int_t rc;
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240 u_char *encrypted;
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241
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242 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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243 &encrypted);
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244
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245 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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246 "rc: %d user: \"%V\" salt: \"%s\"",
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247 rc, &r->headers_in.user, passwd->data);
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248
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249 if (rc == NGX_OK) {
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250 if (ngx_strcmp(encrypted, passwd->data) == 0) {
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251 return NGX_OK;
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252 }
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253
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254 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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255 "encrypted: \"%s\"", encrypted);
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256
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257 return ngx_http_auth_basic_set_realm(r, realm);
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258 }
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259
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260 if (rc == NGX_ERROR) {
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261 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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262 }
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263
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264 /* rc == NGX_AGAIN */
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265
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266 if (ctx == NULL) {
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267 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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268 if (ctx == NULL) {
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269 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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270 }
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271
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272 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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273
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274 ctx->passwd.len = passwd->len;
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275 passwd->len++;
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276
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277 ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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278 if (ctx->passwd.data == NULL) {
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279 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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280 }
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281
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282 }
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283
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284 /* TODO: add mutex event */
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285
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286 return rc;
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287 }
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288
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289
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290 static ngx_int_t
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291 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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292 {
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293 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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294 if (r->headers_out.www_authenticate == NULL) {
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295 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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296 }
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297
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298 r->headers_out.www_authenticate->hash = 1;
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299 r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1;
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300 r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate";
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301 r->headers_out.www_authenticate->value = *realm;
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302
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303 return NGX_HTTP_UNAUTHORIZED;
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304 }
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305
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306 static void
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307 ngx_http_auth_basic_close(ngx_file_t *file)
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308 {
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309 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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310 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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311 ngx_close_file_n " \"%s\" failed", file->name.data);
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312 }
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313 }
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314
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315
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316 static void *
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317 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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318 {
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319 ngx_http_auth_basic_loc_conf_t *conf;
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320
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321 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
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322 if (conf == NULL) {
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323 return NGX_CONF_ERROR;
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324 }
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325
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326 return conf;
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327 }
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328
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329
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330 static char *
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331 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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332 {
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333 ngx_http_auth_basic_loc_conf_t *prev = parent;
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334 ngx_http_auth_basic_loc_conf_t *conf = child;
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335
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581
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336 if (conf->realm.data == NULL) {
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503
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337 conf->realm = prev->realm;
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338 }
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339
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340 if (conf->user_file.data) {
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341 if (ngx_conf_full_name(cf->cycle, &conf->user_file) != NGX_OK) {
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342 return NGX_CONF_ERROR;
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343 }
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344
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345 } else {
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346 conf->user_file = prev->user_file;
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347 }
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348
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349 return NGX_CONF_OK;
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350 }
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351
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352
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353 static ngx_int_t
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354 ngx_http_auth_basic_init(ngx_cycle_t *cycle)
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355 {
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356 ngx_http_handler_pt *h;
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357 ngx_http_core_main_conf_t *cmcf;
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358
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359 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
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360
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361 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
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362 if (h == NULL) {
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363 return NGX_ERROR;
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364 }
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365
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366 *h = ngx_http_auth_basic_handler;
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367
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368 return NGX_OK;
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369 }
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370
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371
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372 static char *
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373 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data)
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374 {
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375 ngx_str_t *realm = data;
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376
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581
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377 size_t len;
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378 u_char *basic, *p;
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379
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503
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380 if (ngx_strcmp(realm->data, "off") == 0) {
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381 realm->len = 0;
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382 realm->data = (u_char *) "";
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583
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383
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384 return NGX_CONF_OK;
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503
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385 }
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386
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581
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387 len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
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388
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389 basic = ngx_palloc(cf->pool, len);
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390 if (basic == NULL) {
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391 return NGX_CONF_ERROR;
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392 }
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393
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394 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
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395 p = ngx_cpymem(p, realm->data, realm->len);
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396 *p = '"';
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397
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398 realm->len = len;
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399 realm->data = basic;
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400
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503
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401 return NGX_CONF_OK;
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402 }
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