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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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626
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10 #include <ngx_crypt.h>
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52
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11
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12
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13 #define NGX_HTTP_AUTH_BUF_SIZE 2048
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14
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15
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16 typedef struct {
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464
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17 ngx_str_t passwd;
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52
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18 } ngx_http_auth_basic_ctx_t;
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19
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20
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21 typedef struct {
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464
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22 ngx_str_t realm;
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23 ngx_http_complex_value_t user_file;
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52
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24 } ngx_http_auth_basic_loc_conf_t;
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25
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26
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27 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r);
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28 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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29 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm);
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30 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r,
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31 ngx_str_t *realm);
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32 static void ngx_http_auth_basic_close(ngx_file_t *file);
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33 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf);
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34 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf,
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35 void *parent, void *child);
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230
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36 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf);
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52
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37 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data);
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460
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38 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd,
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39 void *conf);
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52
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40
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41
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42 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic;
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43
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44 static ngx_command_t ngx_http_auth_basic_commands[] = {
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45
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46 { ngx_string("auth_basic"),
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180
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47 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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48 |NGX_CONF_TAKE1,
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52
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49 ngx_conf_set_str_slot,
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50 NGX_HTTP_LOC_CONF_OFFSET,
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51 offsetof(ngx_http_auth_basic_loc_conf_t, realm),
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52 &ngx_http_auth_basic_p },
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53
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54 { ngx_string("auth_basic_user_file"),
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180
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55 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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56 |NGX_CONF_TAKE1,
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460
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57 ngx_http_auth_basic_user_file,
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52
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58 NGX_HTTP_LOC_CONF_OFFSET,
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59 offsetof(ngx_http_auth_basic_loc_conf_t, user_file),
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60 NULL },
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61
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62 ngx_null_command
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63 };
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64
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65
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216
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66 static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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58
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67 NULL, /* preconfiguration */
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230
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68 ngx_http_auth_basic_init, /* postconfiguration */
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52
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69
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70 NULL, /* create main configuration */
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71 NULL, /* init main configuration */
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72
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73 NULL, /* create server configuration */
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74 NULL, /* merge server configuration */
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75
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76 ngx_http_auth_basic_create_loc_conf, /* create location configuration */
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77 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */
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78 };
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79
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80
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81 ngx_module_t ngx_http_auth_basic_module = {
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58
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82 NGX_MODULE_V1,
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52
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83 &ngx_http_auth_basic_module_ctx, /* module context */
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84 ngx_http_auth_basic_commands, /* module directives */
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85 NGX_HTTP_MODULE, /* module type */
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90
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86 NULL, /* init master */
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230
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87 NULL, /* init module */
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90
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88 NULL, /* init process */
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89 NULL, /* init thread */
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90 NULL, /* exit thread */
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91 NULL, /* exit process */
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92 NULL, /* exit master */
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93 NGX_MODULE_V1_PADDING
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52
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94 };
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95
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96
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97 static ngx_int_t
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98 ngx_http_auth_basic_handler(ngx_http_request_t *r)
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99 {
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100 off_t offset;
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101 ssize_t n;
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102 ngx_fd_t fd;
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88
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103 ngx_int_t rc;
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460
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104 ngx_err_t err;
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105 ngx_str_t pwd, user_file;
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106 ngx_uint_t i, level, login, left, passwd;
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52
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107 ngx_file_t file;
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108 ngx_http_auth_basic_ctx_t *ctx;
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109 ngx_http_auth_basic_loc_conf_t *alcf;
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110 u_char buf[NGX_HTTP_AUTH_BUF_SIZE];
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111 enum {
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112 sw_login,
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113 sw_passwd,
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114 sw_skip
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115 } state;
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116
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117 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module);
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118
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464
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119 if (alcf->realm.len == 0 || alcf->user_file.value.len == 0) {
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358
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120 return NGX_DECLINED;
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52
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121 }
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122
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123 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module);
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124
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125 if (ctx) {
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126 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd,
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127 &alcf->realm);
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128 }
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129
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88
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130 rc = ngx_http_auth_basic_user(r);
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52
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131
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88
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132 if (rc == NGX_DECLINED) {
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452
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133
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134 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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135 "no user/password was provided for basic authentication");
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136
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52
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137 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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138 }
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139
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88
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140 if (rc == NGX_ERROR) {
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52
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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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464
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144 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) {
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145 return NGX_ERROR;
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460
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146 }
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147
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148 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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52
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149
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150 if (fd == NGX_INVALID_FILE) {
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460
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151 err = ngx_errno;
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152
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153 if (err == NGX_ENOENT) {
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154 level = NGX_LOG_ERR;
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155 rc = NGX_HTTP_FORBIDDEN;
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156
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157 } else {
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158 level = NGX_LOG_CRIT;
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159 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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160 }
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161
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162 ngx_log_error(level, r->connection->log, err,
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163 ngx_open_file_n " \"%s\" failed", user_file.data);
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164
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165 return rc;
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52
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166 }
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167
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168 ngx_memzero(&file, sizeof(ngx_file_t));
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169
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170 file.fd = fd;
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460
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171 file.name = user_file;
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172 file.log = r->connection->log;
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173
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174 state = sw_login;
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175 passwd = 0;
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176 login = 0;
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177 left = 0;
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178 offset = 0;
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179
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180 for ( ;; ) {
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262
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181 i = left;
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182
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52
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183 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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184 offset);
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185
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186 if (n == NGX_ERROR) {
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187 ngx_http_auth_basic_close(&file);
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188 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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189 }
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190
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191 if (n == 0) {
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192 break;
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193 }
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194
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195 for (i = left; i < left + n; i++) {
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196 switch (state) {
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197
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198 case sw_login:
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452
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199 if (login == 0) {
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200
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201 if (buf[i] == '#' || buf[i] == CR) {
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202 state = sw_skip;
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203 break;
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204 }
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205
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206 if (buf[i] == LF) {
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207 break;
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208 }
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52
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209 }
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210
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88
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211 if (buf[i] != r->headers_in.user.data[login]) {
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52
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212 state = sw_skip;
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213 break;
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214 }
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215
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88
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216 if (login == r->headers_in.user.len) {
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52
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217 state = sw_passwd;
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218 passwd = i + 1;
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219 }
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220
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221 login++;
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222
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223 break;
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224
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225 case sw_passwd:
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226 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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227 buf[i] = '\0';
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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 pwd.len = i - passwd;
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232 pwd.data = &buf[passwd];
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233
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234 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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235 &alcf->realm);
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236 }
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237
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238 break;
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239
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240 case sw_skip:
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241 if (buf[i] == LF) {
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242 state = sw_login;
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243 login = 0;
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244 }
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245
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246 break;
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247 }
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248 }
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249
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250 if (state == sw_passwd) {
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251 left = left + n - passwd;
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620
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252 ngx_memmove(buf, &buf[passwd], left);
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52
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253 passwd = 0;
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254
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255 } else {
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256 left = 0;
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257 }
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258
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259 offset += n;
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260 }
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261
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262 ngx_http_auth_basic_close(&file);
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263
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262
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264 if (state == sw_passwd) {
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265 pwd.len = i - passwd;
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382
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266 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1);
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262
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267 if (pwd.data == NULL) {
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268 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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269 }
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270
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271 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1);
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272
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273 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm);
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274 }
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275
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452
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276 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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277 "user \"%V\" was not found in \"%V\"",
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460
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278 &r->headers_in.user, &user_file);
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452
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279
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52
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280 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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281 }
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282
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283
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284 static ngx_int_t
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285 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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286 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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287 {
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288 ngx_int_t rc;
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289 u_char *encrypted;
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290
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291 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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292 &encrypted);
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293
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294 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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452
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295 "rc: %d user: \"%V\" salt: \"%s\"",
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296 rc, &r->headers_in.user, passwd->data);
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52
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297
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298 if (rc == NGX_OK) {
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299 if (ngx_strcmp(encrypted, passwd->data) == 0) {
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300 return NGX_OK;
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301 }
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302
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303 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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304 "encrypted: \"%s\"", encrypted);
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305
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452
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306 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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307 "user \"%V\": password mismatch",
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308 &r->headers_in.user);
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309
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52
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310 return ngx_http_auth_basic_set_realm(r, realm);
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311 }
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312
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313 if (rc == NGX_ERROR) {
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314 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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315 }
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316
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317 /* rc == NGX_AGAIN */
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318
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319 if (ctx == NULL) {
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320 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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321 if (ctx == NULL) {
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322 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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323 }
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324
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325 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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326
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327 ctx->passwd.len = passwd->len;
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328 passwd->len++;
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329
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330 ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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331 if (ctx->passwd.data == NULL) {
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332 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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333 }
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334
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335 }
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336
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337 /* TODO: add mutex event */
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338
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339 return rc;
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340 }
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341
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342
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343 static ngx_int_t
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344 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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345 {
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346 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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347 if (r->headers_out.www_authenticate == NULL) {
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348 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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349 }
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350
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58
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351 r->headers_out.www_authenticate->hash = 1;
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570
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352 ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate");
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52
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353 r->headers_out.www_authenticate->value = *realm;
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354
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355 return NGX_HTTP_UNAUTHORIZED;
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356 }
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357
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358 static void
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359 ngx_http_auth_basic_close(ngx_file_t *file)
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360 {
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361 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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362 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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363 ngx_close_file_n " \"%s\" failed", file->name.data);
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364 }
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365 }
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366
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367
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368 static void *
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369 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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370 {
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371 ngx_http_auth_basic_loc_conf_t *conf;
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372
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373 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
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374 if (conf == NULL) {
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496
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375 return NULL;
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52
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376 }
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377
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378 return conf;
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379 }
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380
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381
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382 static char *
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383 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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384 {
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385 ngx_http_auth_basic_loc_conf_t *prev = parent;
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386 ngx_http_auth_basic_loc_conf_t *conf = child;
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387
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130
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388 if (conf->realm.data == NULL) {
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52
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389 conf->realm = prev->realm;
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390 }
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391
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464
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392 if (conf->user_file.value.len == 0) {
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52
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393 conf->user_file = prev->user_file;
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394 }
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395
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396 return NGX_CONF_OK;
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|
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397 }
|
|
|
398
|
|
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399
|
|
|
400 static ngx_int_t
|
|
230
|
401 ngx_http_auth_basic_init(ngx_conf_t *cf)
|
|
52
|
402 {
|
|
|
403 ngx_http_handler_pt *h;
|
|
|
404 ngx_http_core_main_conf_t *cmcf;
|
|
|
405
|
|
230
|
406 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
|
|
52
|
407
|
|
|
408 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
|
|
|
409 if (h == NULL) {
|
|
|
410 return NGX_ERROR;
|
|
|
411 }
|
|
|
412
|
|
|
413 *h = ngx_http_auth_basic_handler;
|
|
|
414
|
|
|
415 return NGX_OK;
|
|
|
416 }
|
|
|
417
|
|
|
418
|
|
|
419 static char *
|
|
|
420 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data)
|
|
|
421 {
|
|
|
422 ngx_str_t *realm = data;
|
|
|
423
|
|
130
|
424 size_t len;
|
|
|
425 u_char *basic, *p;
|
|
|
426
|
|
52
|
427 if (ngx_strcmp(realm->data, "off") == 0) {
|
|
570
|
428 ngx_str_set(realm, "");
|
|
132
|
429 return NGX_CONF_OK;
|
|
52
|
430 }
|
|
|
431
|
|
130
|
432 len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
|
|
|
433
|
|
382
|
434 basic = ngx_pnalloc(cf->pool, len);
|
|
130
|
435 if (basic == NULL) {
|
|
|
436 return NGX_CONF_ERROR;
|
|
|
437 }
|
|
|
438
|
|
|
439 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
|
|
|
440 p = ngx_cpymem(p, realm->data, realm->len);
|
|
|
441 *p = '"';
|
|
|
442
|
|
|
443 realm->len = len;
|
|
|
444 realm->data = basic;
|
|
|
445
|
|
52
|
446 return NGX_CONF_OK;
|
|
|
447 }
|
|
460
|
448
|
|
|
449
|
|
|
450 static char *
|
|
|
451 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
452 {
|
|
|
453 ngx_http_auth_basic_loc_conf_t *alcf = conf;
|
|
|
454
|
|
464
|
455 ngx_str_t *value;
|
|
|
456 ngx_http_compile_complex_value_t ccv;
|
|
460
|
457
|
|
464
|
458 if (alcf->user_file.value.len) {
|
|
460
|
459 return "is duplicate";
|
|
|
460 }
|
|
|
461
|
|
|
462 value = cf->args->elts;
|
|
|
463
|
|
464
|
464 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
460
|
465
|
|
464
|
466 ccv.cf = cf;
|
|
|
467 ccv.value = &value[1];
|
|
|
468 ccv.complex_value = &alcf->user_file;
|
|
|
469 ccv.zero = 1;
|
|
|
470 ccv.conf_prefix = 1;
|
|
460
|
471
|
|
464
|
472 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
460
|
473 return NGX_CONF_ERROR;
|
|
|
474 }
|
|
|
475
|
|
|
476 return NGX_CONF_OK;
|
|
|
477 }
|
