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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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464
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16 ngx_str_t passwd;
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52
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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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464
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21 ngx_str_t realm;
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22 ngx_http_complex_value_t user_file;
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52
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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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460
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37 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd,
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38 void *conf);
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52
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39
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40
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41 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic;
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42
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43 static ngx_command_t ngx_http_auth_basic_commands[] = {
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44
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45 { ngx_string("auth_basic"),
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180
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46 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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47 |NGX_CONF_TAKE1,
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52
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48 ngx_conf_set_str_slot,
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49 NGX_HTTP_LOC_CONF_OFFSET,
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50 offsetof(ngx_http_auth_basic_loc_conf_t, realm),
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51 &ngx_http_auth_basic_p },
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52
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53 { ngx_string("auth_basic_user_file"),
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180
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54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF
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55 |NGX_CONF_TAKE1,
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460
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56 ngx_http_auth_basic_user_file,
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52
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57 NGX_HTTP_LOC_CONF_OFFSET,
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58 offsetof(ngx_http_auth_basic_loc_conf_t, user_file),
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59 NULL },
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60
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61 ngx_null_command
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62 };
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63
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64
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216
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65 static ngx_http_module_t ngx_http_auth_basic_module_ctx = {
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58
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66 NULL, /* preconfiguration */
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230
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67 ngx_http_auth_basic_init, /* postconfiguration */
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52
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68
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69 NULL, /* create main configuration */
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70 NULL, /* init main configuration */
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71
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72 NULL, /* create server configuration */
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73 NULL, /* merge server configuration */
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74
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75 ngx_http_auth_basic_create_loc_conf, /* create location configuration */
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76 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */
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77 };
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78
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79
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80 ngx_module_t ngx_http_auth_basic_module = {
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58
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81 NGX_MODULE_V1,
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52
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82 &ngx_http_auth_basic_module_ctx, /* module context */
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83 ngx_http_auth_basic_commands, /* module directives */
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84 NGX_HTTP_MODULE, /* module type */
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90
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85 NULL, /* init master */
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230
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86 NULL, /* init module */
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90
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87 NULL, /* init process */
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88 NULL, /* init thread */
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89 NULL, /* exit thread */
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90 NULL, /* exit process */
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91 NULL, /* exit master */
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92 NGX_MODULE_V1_PADDING
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52
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93 };
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94
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95
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96 static ngx_int_t
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97 ngx_http_auth_basic_handler(ngx_http_request_t *r)
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98 {
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99 off_t offset;
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100 ssize_t n;
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101 ngx_fd_t fd;
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88
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102 ngx_int_t rc;
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460
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103 ngx_err_t err;
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104 ngx_str_t pwd, user_file;
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105 ngx_uint_t i, level, login, left, passwd;
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52
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106 ngx_file_t file;
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107 ngx_http_auth_basic_ctx_t *ctx;
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108 ngx_http_auth_basic_loc_conf_t *alcf;
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109 u_char buf[NGX_HTTP_AUTH_BUF_SIZE];
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110 enum {
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111 sw_login,
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112 sw_passwd,
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113 sw_skip
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114 } state;
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115
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116 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module);
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117
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464
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118 if (alcf->realm.len == 0 || alcf->user_file.value.len == 0) {
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358
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119 return NGX_DECLINED;
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52
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120 }
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121
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122 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module);
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123
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124 if (ctx) {
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125 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd,
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126 &alcf->realm);
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127 }
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128
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88
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129 rc = ngx_http_auth_basic_user(r);
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130
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88
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131 if (rc == NGX_DECLINED) {
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452
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132
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133 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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134 "no user/password was provided for basic authentication");
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135
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136 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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137 }
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138
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88
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139 if (rc == NGX_ERROR) {
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52
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140 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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141 }
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142
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464
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143 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) {
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144 return NGX_ERROR;
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460
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145 }
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146
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147 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
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52
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148
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149 if (fd == NGX_INVALID_FILE) {
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460
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150 err = ngx_errno;
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151
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152 if (err == NGX_ENOENT) {
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153 level = NGX_LOG_ERR;
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154 rc = NGX_HTTP_FORBIDDEN;
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155
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156 } else {
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157 level = NGX_LOG_CRIT;
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158 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
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159 }
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160
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161 ngx_log_error(level, r->connection->log, err,
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162 ngx_open_file_n " \"%s\" failed", user_file.data);
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163
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164 return rc;
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52
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165 }
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166
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167 ngx_memzero(&file, sizeof(ngx_file_t));
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168
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169 file.fd = fd;
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460
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170 file.name = user_file;
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171 file.log = r->connection->log;
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172
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173 state = sw_login;
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174 passwd = 0;
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175 login = 0;
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176 left = 0;
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177 offset = 0;
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178
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179 for ( ;; ) {
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262
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180 i = left;
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181
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182 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left,
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183 offset);
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184
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185 if (n == NGX_ERROR) {
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186 ngx_http_auth_basic_close(&file);
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187 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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188 }
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189
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190 if (n == 0) {
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191 break;
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192 }
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193
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194 for (i = left; i < left + n; i++) {
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195 switch (state) {
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196
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197 case sw_login:
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452
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198 if (login == 0) {
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199
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200 if (buf[i] == '#' || buf[i] == CR) {
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201 state = sw_skip;
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202 break;
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203 }
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204
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205 if (buf[i] == LF) {
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206 break;
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207 }
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52
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208 }
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209
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88
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210 if (buf[i] != r->headers_in.user.data[login]) {
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211 state = sw_skip;
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212 break;
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213 }
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214
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88
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215 if (login == r->headers_in.user.len) {
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52
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216 state = sw_passwd;
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217 passwd = i + 1;
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218 }
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219
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220 login++;
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221
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222 break;
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223
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224 case sw_passwd:
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225 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') {
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226 buf[i] = '\0';
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227
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228 ngx_http_auth_basic_close(&file);
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229
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230 pwd.len = i - passwd;
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231 pwd.data = &buf[passwd];
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232
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233 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd,
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234 &alcf->realm);
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235 }
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236
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237 break;
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238
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239 case sw_skip:
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240 if (buf[i] == LF) {
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241 state = sw_login;
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242 login = 0;
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243 }
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244
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245 break;
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246 }
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247 }
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248
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249 if (state == sw_passwd) {
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250 left = left + n - passwd;
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620
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251 ngx_memmove(buf, &buf[passwd], left);
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52
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252 passwd = 0;
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253
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254 } else {
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255 left = 0;
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256 }
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257
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258 offset += n;
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259 }
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260
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261 ngx_http_auth_basic_close(&file);
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262
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262
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263 if (state == sw_passwd) {
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264 pwd.len = i - passwd;
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382
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265 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1);
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262
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266 if (pwd.data == NULL) {
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267 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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268 }
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269
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270 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1);
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271
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272 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm);
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273 }
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274
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452
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275 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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276 "user \"%V\" was not found in \"%V\"",
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460
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277 &r->headers_in.user, &user_file);
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452
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278
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279 return ngx_http_auth_basic_set_realm(r, &alcf->realm);
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280 }
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281
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282
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283 static ngx_int_t
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284 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r,
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285 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm)
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286 {
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287 ngx_int_t rc;
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288 u_char *encrypted;
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289
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290 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data,
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291 &encrypted);
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292
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293 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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452
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294 "rc: %d user: \"%V\" salt: \"%s\"",
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295 rc, &r->headers_in.user, passwd->data);
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52
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296
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297 if (rc == NGX_OK) {
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298 if (ngx_strcmp(encrypted, passwd->data) == 0) {
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299 return NGX_OK;
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300 }
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301
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302 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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303 "encrypted: \"%s\"", encrypted);
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304
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452
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305 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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306 "user \"%V\": password mismatch",
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307 &r->headers_in.user);
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308
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52
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309 return ngx_http_auth_basic_set_realm(r, realm);
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310 }
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311
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312 if (rc == NGX_ERROR) {
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313 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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314 }
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315
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316 /* rc == NGX_AGAIN */
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317
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318 if (ctx == NULL) {
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319 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t));
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320 if (ctx == NULL) {
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321 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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322 }
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323
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324 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module);
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325
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326 ctx->passwd.len = passwd->len;
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327 passwd->len++;
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328
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329 ctx->passwd.data = ngx_pstrdup(r->pool, passwd);
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330 if (ctx->passwd.data == NULL) {
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331 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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332 }
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333
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334 }
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335
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336 /* TODO: add mutex event */
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337
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338 return rc;
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339 }
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340
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341
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342 static ngx_int_t
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343 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm)
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344 {
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345 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
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346 if (r->headers_out.www_authenticate == NULL) {
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347 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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348 }
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349
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58
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350 r->headers_out.www_authenticate->hash = 1;
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570
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351 ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate");
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52
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352 r->headers_out.www_authenticate->value = *realm;
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353
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354 return NGX_HTTP_UNAUTHORIZED;
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355 }
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356
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357 static void
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358 ngx_http_auth_basic_close(ngx_file_t *file)
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359 {
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360 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) {
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361 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno,
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362 ngx_close_file_n " \"%s\" failed", file->name.data);
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363 }
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364 }
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365
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366
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367 static void *
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368 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf)
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369 {
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370 ngx_http_auth_basic_loc_conf_t *conf;
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371
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372 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t));
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373 if (conf == NULL) {
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496
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374 return NULL;
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52
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375 }
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376
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377 return conf;
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378 }
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379
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380
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381 static char *
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382 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
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383 {
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384 ngx_http_auth_basic_loc_conf_t *prev = parent;
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385 ngx_http_auth_basic_loc_conf_t *conf = child;
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386
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130
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387 if (conf->realm.data == NULL) {
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52
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388 conf->realm = prev->realm;
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389 }
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390
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464
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391 if (conf->user_file.value.len == 0) {
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52
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392 conf->user_file = prev->user_file;
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393 }
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394
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395 return NGX_CONF_OK;
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396 }
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397
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398
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399 static ngx_int_t
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230
|
400 ngx_http_auth_basic_init(ngx_conf_t *cf)
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52
|
401 {
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402 ngx_http_handler_pt *h;
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403 ngx_http_core_main_conf_t *cmcf;
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404
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230
|
405 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
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52
|
406
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|
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407 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
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|
|
408 if (h == NULL) {
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|
409 return NGX_ERROR;
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|
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410 }
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|
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411
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|
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412 *h = ngx_http_auth_basic_handler;
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413
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414 return NGX_OK;
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|
|
415 }
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|
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416
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|
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417
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|
|
418 static char *
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|
419 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data)
|
|
|
420 {
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|
|
421 ngx_str_t *realm = data;
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|
|
422
|
|
130
|
423 size_t len;
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|
|
424 u_char *basic, *p;
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|
|
425
|
|
52
|
426 if (ngx_strcmp(realm->data, "off") == 0) {
|
|
570
|
427 ngx_str_set(realm, "");
|
|
132
|
428 return NGX_CONF_OK;
|
|
52
|
429 }
|
|
|
430
|
|
130
|
431 len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
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|
|
432
|
|
382
|
433 basic = ngx_pnalloc(cf->pool, len);
|
|
130
|
434 if (basic == NULL) {
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|
|
435 return NGX_CONF_ERROR;
|
|
|
436 }
|
|
|
437
|
|
|
438 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
|
|
|
439 p = ngx_cpymem(p, realm->data, realm->len);
|
|
|
440 *p = '"';
|
|
|
441
|
|
|
442 realm->len = len;
|
|
|
443 realm->data = basic;
|
|
|
444
|
|
52
|
445 return NGX_CONF_OK;
|
|
|
446 }
|
|
460
|
447
|
|
|
448
|
|
|
449 static char *
|
|
|
450 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
451 {
|
|
|
452 ngx_http_auth_basic_loc_conf_t *alcf = conf;
|
|
|
453
|
|
464
|
454 ngx_str_t *value;
|
|
|
455 ngx_http_compile_complex_value_t ccv;
|
|
460
|
456
|
|
464
|
457 if (alcf->user_file.value.len) {
|
|
460
|
458 return "is duplicate";
|
|
|
459 }
|
|
|
460
|
|
|
461 value = cf->args->elts;
|
|
|
462
|
|
464
|
463 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
460
|
464
|
|
464
|
465 ccv.cf = cf;
|
|
|
466 ccv.value = &value[1];
|
|
|
467 ccv.complex_value = &alcf->user_file;
|
|
|
468 ccv.zero = 1;
|
|
|
469 ccv.conf_prefix = 1;
|
|
460
|
470
|
|
464
|
471 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
460
|
472 return NGX_CONF_ERROR;
|
|
|
473 }
|
|
|
474
|
|
|
475 return NGX_CONF_OK;
|
|
|
476 }
|
