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0
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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_USERID_OFF 0
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13 #define NGX_HTTP_USERID_LOG 1
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14 #define NGX_HTTP_USERID_V1 2
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15 #define NGX_HTTP_USERID_ON 3
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16
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17 /* 31 Dec 2037 23:55:55 GMT */
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18 #define NGX_HTTP_USERID_MAX_EXPIRES 2145916555
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19
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20
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21 typedef struct {
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22 ngx_flag_t enable;
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23
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24 ngx_int_t service;
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25
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26 ngx_str_t name;
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27 ngx_str_t domain;
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28 ngx_str_t path;
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29 time_t expires;
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30
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31 ngx_int_t p3p;
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32 ngx_str_t p3p_string;
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33 } ngx_http_userid_conf_t;
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34
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35
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36 typedef struct {
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37 uint32_t uid_got[4];
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38 uint32_t uid_set[4];
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39 } ngx_http_userid_ctx_t;
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40
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41
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42 static ngx_int_t ngx_http_userid_get_uid(ngx_http_request_t *r,
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43 ngx_http_userid_ctx_t *ctx,
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44 ngx_http_userid_conf_t *conf);
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45 static ngx_int_t ngx_http_userid_set_uid(ngx_http_request_t *r,
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46 ngx_http_userid_ctx_t *ctx,
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47 ngx_http_userid_conf_t *conf);
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48
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49 static u_char *ngx_http_userid_log_uid_got(ngx_http_request_t *r, u_char *buf,
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50 uintptr_t data);
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51 static u_char *ngx_http_userid_log_uid_set(ngx_http_request_t *r, u_char *buf,
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52 uintptr_t data);
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53
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54 static ngx_int_t ngx_http_userid_init(ngx_cycle_t *cycle);
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55 static ngx_int_t ngx_http_userid_pre_conf(ngx_conf_t *cf);
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56 static void *ngx_http_userid_create_conf(ngx_conf_t *cf);
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57 static char *ngx_http_userid_merge_conf(ngx_conf_t *cf, void *parent,
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58 void *child);
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59 char *ngx_conf_check_domain(ngx_conf_t *cf, void *post, void *data);
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60 char *ngx_http_userid_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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61
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62
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63 static uint32_t sequencer_v1 = 1;
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64 static uint32_t sequencer_v2 = 0x03030302;
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65
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66
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67 static u_char expires[] = "; expires=Thu, 31-Dec-37 23:55:55 GMT";
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68
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69
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70 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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71
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72
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73 static ngx_conf_enum_t ngx_http_userid_state[] = {
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74 { ngx_string("off"), NGX_HTTP_USERID_OFF },
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75 { ngx_string("log"), NGX_HTTP_USERID_LOG },
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76 { ngx_string("v1"), NGX_HTTP_USERID_V1 },
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77 { ngx_string("on"), NGX_HTTP_USERID_ON },
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78 { ngx_null_string, 0 }
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79 };
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80
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81
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82 static ngx_conf_post_handler_pt ngx_conf_check_domain_p =
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83 ngx_conf_check_domain;
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84
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85
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86 static ngx_command_t ngx_http_userid_commands[] = {
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87
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88 { ngx_string("userid"),
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89 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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90 ngx_conf_set_enum_slot,
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91 NGX_HTTP_LOC_CONF_OFFSET,
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92 offsetof(ngx_http_userid_conf_t, enable),
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93 ngx_http_userid_state },
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94
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95 { ngx_string("userid_service"),
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96 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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97 ngx_conf_set_num_slot,
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98 NGX_HTTP_LOC_CONF_OFFSET,
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99 offsetof(ngx_http_userid_conf_t, service),
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100 NULL },
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101
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102 { ngx_string("userid_name"),
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103 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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104 ngx_conf_set_str_slot,
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105 NGX_HTTP_LOC_CONF_OFFSET,
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106 offsetof(ngx_http_userid_conf_t, name),
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107 NULL },
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108
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109 { ngx_string("userid_domain"),
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110 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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111 ngx_conf_set_str_slot,
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112 NGX_HTTP_LOC_CONF_OFFSET,
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113 offsetof(ngx_http_userid_conf_t, domain),
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114 &ngx_conf_check_domain_p },
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115
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116 { ngx_string("userid_path"),
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117 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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118 ngx_conf_set_str_slot,
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119 NGX_HTTP_LOC_CONF_OFFSET,
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120 offsetof(ngx_http_userid_conf_t, path),
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121 NULL },
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122
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123 { ngx_string("userid_expires"),
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124 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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125 ngx_http_userid_expires,
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126 NGX_HTTP_LOC_CONF_OFFSET,
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127 0,
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128 NULL },
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129
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130 ngx_null_command
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131 };
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132
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133
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134 ngx_http_module_t ngx_http_userid_filter_module_ctx = {
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135 ngx_http_userid_pre_conf, /* pre conf */
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136
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137 NULL, /* create main configuration */
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138 NULL, /* init main configuration */
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139
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140 NULL, /* create server configuration */
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141 NULL, /* merge server configuration */
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142
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143 ngx_http_userid_create_conf, /* create location configration */
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144 ngx_http_userid_merge_conf /* merge location configration */
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145 };
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146
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147
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148 ngx_module_t ngx_http_userid_filter_module = {
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149 NGX_MODULE,
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150 &ngx_http_userid_filter_module_ctx, /* module context */
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151 ngx_http_userid_commands, /* module directives */
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152 NGX_HTTP_MODULE, /* module type */
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153 ngx_http_userid_init, /* init module */
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154 NULL /* init process */
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155 };
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156
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157
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158 static ngx_http_log_op_name_t ngx_http_userid_log_fmt_ops[] = {
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159 { ngx_string("uid_got"), 0, ngx_http_userid_log_uid_got },
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160 { ngx_string("uid_set"), 0, ngx_http_userid_log_uid_set },
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161 { ngx_null_string, 0, NULL }
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162 };
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163
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164
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165 static ngx_int_t ngx_http_userid_filter(ngx_http_request_t *r)
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166 {
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167 ngx_int_t rc;
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168 ngx_http_userid_ctx_t *ctx;
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169 ngx_http_userid_conf_t *conf;
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170
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171 conf = ngx_http_get_module_loc_conf(r, ngx_http_userid_filter_module);
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172
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173 if (conf->enable == NGX_HTTP_USERID_OFF) {
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174 return ngx_http_next_header_filter(r);
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175 }
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176
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177 ngx_http_create_ctx(r, ctx, ngx_http_userid_filter_module,
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178 sizeof(ngx_http_userid_ctx_t), NGX_ERROR);
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179
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180 rc = ngx_http_userid_get_uid(r, ctx, conf);
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181
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182 if (rc != NGX_OK) {
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183 return rc;
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184 }
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185
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186 if (conf->enable == NGX_HTTP_USERID_LOG || ctx->uid_got[3] != 0) {
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187 return ngx_http_next_header_filter(r);
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188 }
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189
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190 rc = ngx_http_userid_set_uid(r, ctx, conf);
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191
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192 if (rc != NGX_OK) {
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193 return rc;
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194 }
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195
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196 return ngx_http_next_header_filter(r);
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197 }
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198
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199
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200 static ngx_int_t ngx_http_userid_get_uid(ngx_http_request_t *r,
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201 ngx_http_userid_ctx_t *ctx,
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202 ngx_http_userid_conf_t *conf)
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203 {
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204 u_char *start, *last, *end;
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205 ngx_uint_t i;
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206 ngx_str_t src, dst;
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207 ngx_table_elt_t **cookies;
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208
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209 cookies = r->headers_in.cookies.elts;
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210
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211 for (i = 0; i < r->headers_in.cookies.nelts; i++) {
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212 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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213 "cookie: \"%s\"", cookies[i]->value.data);
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214
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215 end = cookies[i]->value.data + cookies[i]->value.len;
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216
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217 for (start = cookies[i]->value.data; start < end; /* void */) {
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218
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219 if (conf->name.len >= cookies[i]->value.len
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220 || ngx_strncmp(start, conf->name.data, conf->name.len) != 0)
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221 {
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222 start += conf->name.len;
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223 while (start < end && *start++ != ';') { /* void */ }
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224
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225 for (/* void */; start < end && *start == ' '; start++) { /**/ }
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226
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227 continue;
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228 }
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229
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230 for (start += conf->name.len; start < end && *start == ' '; start++)
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231 {
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232 /* void */
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233 }
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234
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235 if (*start != '=') {
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236 break;
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237 }
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238
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239 for (start++; start < end && *start == ' '; start++) { /* void */ }
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240
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241 for (last = start; last < end && *last != ';'; last++) { /**/ }
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242
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243 if (last - start < 22) {
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244 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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245 "client sent too short userid cookie \"%s\"",
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246 cookies[i]->value.data);
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247 break;
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248 }
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249
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250 /*
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251 * we have to limit encoded string to 22 characters
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252 * because there are already the millions cookies with a garbage
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253 * instead of the correct base64 trail "=="
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254 */
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255
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256 src.len = 22;
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257 src.data = start;
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258 dst.data = (u_char *) ctx->uid_got;
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259
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2
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260 if (ngx_decode_base64(&dst, &src) == NGX_ERROR) {
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0
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261 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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262 "client sent invalid userid cookie \"%s\"",
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263 cookies[i]->value.data);
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264 break;
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265 }
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266
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267 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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268 "uid: %08X%08X%08X%08X",
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269 ctx->uid_got[0], ctx->uid_got[1],
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270 ctx->uid_got[2], ctx->uid_got[3]);
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271
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272 return NGX_OK;
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273 }
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274 }
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275
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276 return NGX_OK;
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277 }
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278
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279
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280 static ngx_int_t ngx_http_userid_set_uid(ngx_http_request_t *r,
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281 ngx_http_userid_ctx_t *ctx,
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282 ngx_http_userid_conf_t *conf)
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283
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284 {
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285 u_char *cookie, *p;
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286 size_t len;
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287 socklen_t slen;
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288 struct sockaddr_in addr_in;
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289 ngx_str_t src, dst;
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290 ngx_table_elt_t *set_cookie;
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291
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292 /* TODO: mutex for sequencers */
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293
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294 if (conf->enable == NGX_HTTP_USERID_V1) {
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295 if (conf->service == NGX_CONF_UNSET) {
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296 ctx->uid_set[0] = 0;
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297 } else {
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298 ctx->uid_set[0] = htonl(conf->service);
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299 }
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300
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301 ctx->uid_set[1] = ngx_time();
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302 ctx->uid_set[2] = ngx_pid;
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303 ctx->uid_set[3] = sequencer_v1;
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304 sequencer_v1 += 0x100;
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305
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306 } else {
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307 if (conf->service == NGX_CONF_UNSET) {
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308 if (r->in_addr == 0) {
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309 slen = sizeof(struct sockaddr_in);
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310 if (getsockname(r->connection->fd,
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311 (struct sockaddr *) &addr_in, &slen) == -1)
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312 {
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313 ngx_log_error(NGX_LOG_CRIT, r->connection->log,
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314 ngx_socket_errno,
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315 "getsockname() failed");
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316 }
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317
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318 r->in_addr = addr_in.sin_addr.s_addr;
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319 }
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320
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321 ctx->uid_set[0] = htonl(r->in_addr);
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322
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323 } else {
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324 ctx->uid_set[0] = htonl(conf->service);
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325 }
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326
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327 ctx->uid_set[1] = htonl(ngx_time());
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328 ctx->uid_set[2] = htonl(ngx_pid);
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329 ctx->uid_set[3] = htonl(sequencer_v2);
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330 sequencer_v2 += 0x100;
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331 if (sequencer_v2 < 0x03030302) {
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332 sequencer_v2 = 0x03030302;
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333 }
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334 }
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335
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336 len = conf->name.len + 1 + ngx_base64_encoded_length(16) + 1;
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337
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338 if (conf->expires) {
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339 len += sizeof(expires) - 1 + 2;
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340 }
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341
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342 if (conf->domain.len > 1) {
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343 len += sizeof("; domain=") - 1 + conf->domain.len;
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344 }
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345
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346 if (conf->path.len) {
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347 len += sizeof("; path=") - 1 + conf->path.len;
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348 }
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349
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350 if (!(cookie = ngx_palloc(r->pool, len))) {
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351 return NGX_ERROR;
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352 }
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353
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354 p = ngx_cpymem(cookie, conf->name.data, conf->name.len);
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355 *p++ = '=';
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356
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357 src.len = 16;
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358 src.data = (u_char *) ctx->uid_set;
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359 dst.data = p;
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360
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2
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361 ngx_encode_base64(&dst, &src);
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0
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362
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363 p += dst.len;
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364
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365 if (conf->expires == NGX_HTTP_USERID_MAX_EXPIRES) {
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366 p = ngx_cpymem(p, expires, sizeof(expires) - 1);
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367
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368 } else if (conf->expires) {
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369 p = ngx_cpymem(p, expires, sizeof("; expires=") - 1);
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370 p += ngx_http_cookie_time(p, ngx_time() + conf->expires);
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371 }
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372
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373 if (conf->domain.len > 1) {
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374 p = ngx_cpymem(p, "; domain=", sizeof("; domain=") - 1);
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375 p = ngx_cpymem(p, conf->domain.data, conf->domain.len);
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376 }
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377
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378 if (conf->path.len) {
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379 p = ngx_cpymem(p, "; path=", sizeof("; path=") - 1);
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380 p = ngx_cpymem(p, conf->path.data, conf->path.len);
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381 }
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382
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383 *p = '\0';
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384
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385 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
386 "uid cookie: \"%s\"", cookie);
|
|
|
387
|
|
|
388 if (!(set_cookie = ngx_list_push(&r->headers_out.headers))) {
|
|
|
389 return NGX_ERROR;
|
|
|
390 }
|
|
|
391
|
|
|
392 set_cookie->key.len = sizeof("Set-Cookie") - 1;
|
|
|
393 set_cookie->key.data = (u_char *) "Set-Cookie";
|
|
|
394 set_cookie->value.len = p - cookie;
|
|
|
395 set_cookie->value.data = cookie;
|
|
|
396
|
|
|
397 return NGX_OK;
|
|
|
398 }
|
|
|
399
|
|
|
400
|
|
|
401 static u_char *ngx_http_userid_log_uid_got(ngx_http_request_t *r, u_char *buf,
|
|
|
402 uintptr_t data)
|
|
|
403 {
|
|
|
404 ngx_http_userid_ctx_t *ctx;
|
|
|
405 ngx_http_userid_conf_t *conf;
|
|
|
406
|
|
|
407 ctx = ngx_http_get_module_ctx(r, ngx_http_userid_filter_module);
|
|
|
408
|
|
|
409 if (ctx == NULL || ctx->uid_got[3] == 0) {
|
|
|
410 if (buf == NULL) {
|
|
|
411 return (u_char *) 1;
|
|
|
412 }
|
|
|
413
|
|
|
414 *buf = '-';
|
|
|
415 return buf + 1;
|
|
|
416 }
|
|
|
417
|
|
|
418 conf = ngx_http_get_module_loc_conf(r, ngx_http_userid_filter_module);
|
|
|
419
|
|
|
420 if (buf == NULL) {
|
|
|
421 return (u_char *) (conf->name.len + 1 + 32);
|
|
|
422 }
|
|
|
423
|
|
|
424 buf = ngx_cpymem(buf, conf->name.data, conf->name.len);
|
|
|
425
|
|
|
426 *buf++ = '=';
|
|
|
427
|
|
|
428 return buf + ngx_snprintf((char *) buf, 33, "%08X%08X%08X%08X",
|
|
|
429 ctx->uid_got[0], ctx->uid_got[1],
|
|
|
430 ctx->uid_got[2], ctx->uid_got[3]);
|
|
|
431 }
|
|
|
432
|
|
|
433
|
|
|
434 static u_char *ngx_http_userid_log_uid_set(ngx_http_request_t *r, u_char *buf,
|
|
|
435 uintptr_t data)
|
|
|
436 {
|
|
|
437 ngx_http_userid_ctx_t *ctx;
|
|
|
438 ngx_http_userid_conf_t *conf;
|
|
|
439
|
|
|
440 ctx = ngx_http_get_module_ctx(r, ngx_http_userid_filter_module);
|
|
|
441
|
|
|
442 if (ctx == NULL || ctx->uid_set[3] == 0) {
|
|
|
443 if (buf == NULL) {
|
|
|
444 return (u_char *) 1;
|
|
|
445 }
|
|
|
446
|
|
|
447 *buf = '-';
|
|
|
448 return buf + 1;
|
|
|
449 }
|
|
|
450
|
|
|
451 conf = ngx_http_get_module_loc_conf(r, ngx_http_userid_filter_module);
|
|
|
452
|
|
|
453 if (buf == NULL) {
|
|
|
454 return (u_char *) (conf->name.len + 1 + 32);
|
|
|
455 }
|
|
|
456
|
|
|
457 buf = ngx_cpymem(buf, conf->name.data, conf->name.len);
|
|
|
458
|
|
|
459 *buf++ = '=';
|
|
|
460
|
|
|
461 return buf + ngx_snprintf((char *) buf, 33, "%08X%08X%08X%08X",
|
|
|
462 ctx->uid_set[0], ctx->uid_set[1],
|
|
|
463 ctx->uid_set[2], ctx->uid_set[3]);
|
|
|
464 }
|
|
|
465
|
|
|
466
|
|
|
467 static ngx_int_t ngx_http_userid_init(ngx_cycle_t *cycle)
|
|
|
468 {
|
|
|
469 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
470 ngx_http_top_header_filter = ngx_http_userid_filter;
|
|
|
471
|
|
|
472 return NGX_OK;
|
|
|
473 }
|
|
|
474
|
|
|
475
|
|
|
476 static ngx_int_t ngx_http_userid_pre_conf(ngx_conf_t *cf)
|
|
|
477 {
|
|
|
478 ngx_http_log_op_name_t *op;
|
|
|
479
|
|
|
480 for (op = ngx_http_userid_log_fmt_ops; op->name.len; op++) { /* void */ }
|
|
|
481 op->op = NULL;
|
|
|
482
|
|
|
483 op = ngx_http_log_fmt_ops;
|
|
|
484
|
|
|
485 for (op = ngx_http_log_fmt_ops; op->op; op++) {
|
|
|
486 if (op->name.len == 0) {
|
|
|
487 op = (ngx_http_log_op_name_t *) op->op;
|
|
|
488 }
|
|
|
489 }
|
|
|
490
|
|
|
491 op->op = (ngx_http_log_op_pt) ngx_http_userid_log_fmt_ops;
|
|
|
492
|
|
|
493 return NGX_OK;
|
|
|
494 }
|
|
|
495
|
|
|
496
|
|
|
497 static void *ngx_http_userid_create_conf(ngx_conf_t *cf)
|
|
|
498 {
|
|
|
499 ngx_http_userid_conf_t *conf;
|
|
|
500
|
|
|
501 if (!(conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_userid_conf_t)))) {
|
|
|
502 return NGX_CONF_ERROR;
|
|
|
503 }
|
|
|
504
|
|
|
505 /* set by ngx_pcalloc():
|
|
|
506
|
|
|
507 conf->name.len = 0;
|
|
|
508 conf->name.date = NULL;
|
|
|
509 conf->domain.len = 0;
|
|
|
510 conf->domain.date = NULL;
|
|
|
511 conf->path.len = 0;
|
|
|
512 conf->path.date = NULL;
|
|
|
513
|
|
|
514 */
|
|
|
515
|
|
|
516 conf->enable = NGX_CONF_UNSET;
|
|
|
517 conf->service = NGX_CONF_UNSET;
|
|
|
518 conf->expires = NGX_CONF_UNSET;
|
|
|
519
|
|
|
520 return conf;
|
|
|
521 }
|
|
|
522
|
|
|
523
|
|
|
524 static char *ngx_http_userid_merge_conf(ngx_conf_t *cf, void *parent,
|
|
|
525 void *child)
|
|
|
526 {
|
|
|
527 ngx_http_userid_conf_t *prev = parent;
|
|
|
528 ngx_http_userid_conf_t *conf = child;
|
|
|
529
|
|
|
530 ngx_conf_merge_value(conf->enable, prev->enable, NGX_HTTP_USERID_OFF);
|
|
|
531
|
|
|
532 ngx_conf_merge_str_value(conf->name, prev->name, "uid");
|
|
|
533 ngx_conf_merge_str_value(conf->domain, prev->domain, ".");
|
|
|
534 ngx_conf_merge_str_value(conf->path, prev->path, "/");
|
|
|
535
|
|
|
536 ngx_conf_merge_value(conf->service, prev->service, NGX_CONF_UNSET);
|
|
|
537 ngx_conf_merge_sec_value(conf->expires, prev->expires, 0);
|
|
|
538
|
|
|
539 return NGX_CONF_OK;
|
|
|
540 }
|
|
|
541
|
|
|
542
|
|
|
543 char *ngx_conf_check_domain(ngx_conf_t *cf, void *post, void *data)
|
|
|
544 {
|
|
|
545 ngx_str_t *domain = data;
|
|
|
546
|
|
|
547 if (domain->len == 4 && ngx_strcmp(domain->data, "none") == 0) {
|
|
|
548 domain->len = 1;
|
|
|
549 domain->data = (u_char *) ".";
|
|
|
550 }
|
|
|
551
|
|
|
552 return NGX_CONF_OK;
|
|
|
553 }
|
|
|
554
|
|
|
555
|
|
|
556 char *ngx_http_userid_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
557 {
|
|
|
558 ngx_http_userid_conf_t *ucf = conf;
|
|
|
559
|
|
|
560 ngx_str_t *value;
|
|
|
561
|
|
|
562 if (ucf->expires != NGX_CONF_UNSET) {
|
|
|
563 return "is duplicate";
|
|
|
564 }
|
|
|
565
|
|
|
566 value = cf->args->elts;
|
|
|
567
|
|
|
568 if (ngx_strcmp(value[1].data, "max") == 0) {
|
|
|
569 ucf->expires = NGX_HTTP_USERID_MAX_EXPIRES;
|
|
|
570 return NGX_CONF_OK;
|
|
|
571 }
|
|
|
572
|
|
|
573 if (ngx_strcmp(value[1].data, "off") == 0) {
|
|
|
574 ucf->expires = 0;
|
|
|
575 return NGX_CONF_OK;
|
|
|
576 }
|
|
|
577
|
|
|
578 ucf->expires = ngx_parse_time(&value[1], 1);
|
|
|
579 if (ucf->expires == NGX_ERROR) {
|
|
|
580 return "invalid value";
|
|
|
581 }
|
|
|
582
|
|
|
583 if (ucf->expires == NGX_PARSE_LARGE_TIME) {
|
|
|
584 return "value must be less than 68 years";
|
|
|
585 }
|
|
|
586
|
|
|
587 return NGX_CONF_OK;
|
|
|
588 }
|
