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annotate src/http/modules/ngx_http_secure_link_module.c @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents c7d4017c8876
children bdd4d89370a7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
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5 */
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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11 #include <ngx_md5.h>
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13
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14 typedef struct {
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15 ngx_http_complex_value_t *variable;
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16 ngx_http_complex_value_t *md5;
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17 ngx_str_t secret;
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18 } ngx_http_secure_link_conf_t;
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19
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21 typedef struct {
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22 ngx_str_t expires;
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23 } ngx_http_secure_link_ctx_t;
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26 static ngx_int_t ngx_http_secure_link_old_variable(ngx_http_request_t *r,
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27 ngx_http_secure_link_conf_t *conf, ngx_http_variable_value_t *v,
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28 uintptr_t data);
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29 static ngx_int_t ngx_http_secure_link_expires_variable(ngx_http_request_t *r,
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30 ngx_http_variable_value_t *v, uintptr_t data);
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31 static void *ngx_http_secure_link_create_conf(ngx_conf_t *cf);
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32 static char *ngx_http_secure_link_merge_conf(ngx_conf_t *cf, void *parent,
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33 void *child);
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34 static ngx_int_t ngx_http_secure_link_add_variables(ngx_conf_t *cf);
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35
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36
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37 static ngx_command_t ngx_http_secure_link_commands[] = {
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38
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39 { ngx_string("secure_link"),
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40 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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41 ngx_http_set_complex_value_slot,
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42 NGX_HTTP_LOC_CONF_OFFSET,
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43 offsetof(ngx_http_secure_link_conf_t, variable),
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44 NULL },
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45
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46 { ngx_string("secure_link_md5"),
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47 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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48 ngx_http_set_complex_value_slot,
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49 NGX_HTTP_LOC_CONF_OFFSET,
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50 offsetof(ngx_http_secure_link_conf_t, md5),
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51 NULL },
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52
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53 { ngx_string("secure_link_secret"),
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54 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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55 ngx_conf_set_str_slot,
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56 NGX_HTTP_LOC_CONF_OFFSET,
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57 offsetof(ngx_http_secure_link_conf_t, secret),
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58 NULL },
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59
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60 ngx_null_command
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61 };
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62
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63
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64 static ngx_http_module_t ngx_http_secure_link_module_ctx = {
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65 ngx_http_secure_link_add_variables, /* preconfiguration */
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66 NULL, /* postconfiguration */
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67
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68 NULL, /* create main configuration */
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69 NULL, /* init main configuration */
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70
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71 NULL, /* create server configuration */
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72 NULL, /* merge server configuration */
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73
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74 ngx_http_secure_link_create_conf, /* create location configuration */
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75 ngx_http_secure_link_merge_conf /* merge location configuration */
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76 };
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77
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78
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79 ngx_module_t ngx_http_secure_link_module = {
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80 NGX_MODULE_V1,
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81 &ngx_http_secure_link_module_ctx, /* module context */
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82 ngx_http_secure_link_commands, /* module directives */
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83 NGX_HTTP_MODULE, /* module type */
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84 NULL, /* init master */
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85 NULL, /* init module */
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86 NULL, /* init process */
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87 NULL, /* init thread */
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88 NULL, /* exit thread */
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89 NULL, /* exit process */
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90 NULL, /* exit master */
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91 NGX_MODULE_V1_PADDING
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92 };
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93
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94
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95 static ngx_str_t ngx_http_secure_link_name = ngx_string("secure_link");
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96 static ngx_str_t ngx_http_secure_link_expires_name =
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97 ngx_string("secure_link_expires");
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98
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99
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100 static ngx_int_t
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101 ngx_http_secure_link_variable(ngx_http_request_t *r,
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102 ngx_http_variable_value_t *v, uintptr_t data)
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103 {
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104 u_char *p, *last;
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105 ngx_str_t val, hash;
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106 time_t expires;
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107 ngx_md5_t md5;
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108 ngx_http_secure_link_ctx_t *ctx;
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109 ngx_http_secure_link_conf_t *conf;
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110 u_char hash_buf[18], md5_buf[16];
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111
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112 conf = ngx_http_get_module_loc_conf(r, ngx_http_secure_link_module);
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113
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114 if (conf->secret.data) {
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115 return ngx_http_secure_link_old_variable(r, conf, v, data);
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116 }
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117
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118 if (conf->variable == NULL || conf->md5 == NULL) {
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119 goto not_found;
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120 }
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121
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122 if (ngx_http_complex_value(r, conf->variable, &val) != NGX_OK) {
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123 return NGX_ERROR;
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124 }
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125
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diff changeset
126 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
127 "secure link: \"%V\"", &val);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
128
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
129 last = val.data + val.len;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
130
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
131 p = ngx_strlchr(val.data, last, ',');
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
132 expires = 0;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
133
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
134 if (p) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
135 val.len = p++ - val.data;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
136
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
137 expires = ngx_atotm(p, last - p);
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
138 if (expires <= 0) {
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
139 goto not_found;
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
140 }
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
141
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
142 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_secure_link_ctx_t));
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
143 if (ctx == NULL) {
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
144 return NGX_ERROR;
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
145 }
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
146
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
147 ngx_http_set_ctx(r, ctx, ngx_http_secure_link_module);
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
148
3760
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
149 ctx->expires.len = last - p;
38f74d11e5bd discard "secure_link_expires on|off"
Igor Sysoev <igor@sysoev.ru>
parents: 3756
diff changeset
150 ctx->expires.data = p;
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
151 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
152
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
153 if (val.len > 24) {
2260
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
154 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
155 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
156
3756
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
157 hash.data = hash_buf;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
158
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
159 if (ngx_decode_base64url(&hash, &val) != NGX_OK) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
160 goto not_found;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
161 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
162
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
163 if (hash.len != 16) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
164 goto not_found;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
165 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
166
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
167 if (ngx_http_complex_value(r, conf->md5, &val) != NGX_OK) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
168 return NGX_ERROR;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
169 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
170
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
171 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
172 "secure link md5: \"%V\"", &val);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
173
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
174 ngx_md5_init(&md5);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
175 ngx_md5_update(&md5, val.data, val.len);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
176 ngx_md5_final(md5_buf, &md5);
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
177
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
178 if (ngx_memcmp(hash_buf, md5_buf, 16) != 0) {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
179 goto not_found;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
180 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
181
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
182 v->data = (u_char *) ((expires && expires < ngx_time()) ? "0" : "1");
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
183 v->len = 1;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
184 v->valid = 1;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
185 v->no_cacheable = 0;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
186 v->not_found = 0;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
187
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
188 return NGX_OK;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
189
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
190 not_found:
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
191
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
192 v->not_found = 1;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
193
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
194 return NGX_OK;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
195 }
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
196
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
197
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
198 static ngx_int_t
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
199 ngx_http_secure_link_old_variable(ngx_http_request_t *r,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
200 ngx_http_secure_link_conf_t *conf, ngx_http_variable_value_t *v,
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
201 uintptr_t data)
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
202 {
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
203 u_char *p, *start, *end, *last;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
204 size_t len;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
205 ngx_int_t n;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
206 ngx_uint_t i;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
207 ngx_md5_t md5;
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
208 u_char hash[16];
7224d008faaf new ngx_http_secure_link_module with secure_link, secure_link_md5, and
Igor Sysoev <igor@sysoev.ru>
parents: 2912
diff changeset
209
2260
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210 p = &r->unparsed_uri.data[1];
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 last = r->unparsed_uri.data + r->unparsed_uri.len;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
212
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
213 while (p < last) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
214 if (*p++ == '/') {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215 start = p;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216 goto md5_start;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
217 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
218 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
219
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
220 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
221
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
222 md5_start:
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
223
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
224 while (p < last) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
225 if (*p++ == '/') {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
226 end = p - 1;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
227 goto url_start;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
228 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
231 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
233 url_start:
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
234
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
235 len = last - p;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
236
2279
bbb17a60ec44 allow short secure links
Igor Sysoev <igor@sysoev.ru>
parents: 2260
diff changeset
237 if (end - start != 32 || len == 0) {
2260
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
238 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
239 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
240
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
241 ngx_md5_init(&md5);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
242 ngx_md5_update(&md5, p, len);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
243 ngx_md5_update(&md5, conf->secret.data, conf->secret.len);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
244 ngx_md5_final(hash, &md5);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
245
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
246 for (i = 0; i < 16; i++) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
247 n = ngx_hextoi(&start[2 * i], 2);
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
248 if (n == NGX_ERROR || n != hash[i]) {
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
249 goto not_found;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
250 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
251 }
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
252
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
253 v->len = len;
4f1616b32744 ngx_http_secure_link_module
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
254 v->valid = 1;
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255 v->no_cacheable = 0;
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256 v->not_found = 0;
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257 v->data = p;
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258
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259 return NGX_OK;
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260
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261 not_found:
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262
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263 v->not_found = 1;
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264
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265 return NGX_OK;
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266 }
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267
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268
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269 static ngx_int_t
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270 ngx_http_secure_link_expires_variable(ngx_http_request_t *r,
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271 ngx_http_variable_value_t *v, uintptr_t data)
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272 {
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273 ngx_http_secure_link_ctx_t *ctx;
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274
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275 ctx = ngx_http_get_module_ctx(r, ngx_http_secure_link_module);
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276
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277 if (ctx) {
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278 v->len = ctx->expires.len;
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279 v->valid = 1;
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280 v->no_cacheable = 0;
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281 v->not_found = 0;
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282 v->data = ctx->expires.data;
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283
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284 } else {
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285 v->not_found = 1;
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286 }
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287
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288 return NGX_OK;
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289 }
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290
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291
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292 static void *
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293 ngx_http_secure_link_create_conf(ngx_conf_t *cf)
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294 {
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295 ngx_http_secure_link_conf_t *conf;
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296
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297 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_secure_link_conf_t));
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298 if (conf == NULL) {
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299 return NULL;
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300 }
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301
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302 /*
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303 * set by ngx_pcalloc():
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304 *
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305 * conf->variable = NULL;
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306 * conf->md5 = NULL;
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307 * conf->secret = { 0, NULL };
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308 */
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309
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310 return conf;
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311 }
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312
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313
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314 static char *
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315 ngx_http_secure_link_merge_conf(ngx_conf_t *cf, void *parent, void *child)
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316 {
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317 ngx_http_secure_link_conf_t *prev = parent;
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318 ngx_http_secure_link_conf_t *conf = child;
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319
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320 if (conf->secret.data) {
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321 if (conf->variable || conf->md5) {
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322 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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323 "\"secure_link_secret\" cannot be mixed with "
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324 "\"secure_link\" and \"secure_link_md5\"");
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325 return NGX_CONF_ERROR;
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326 }
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327
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328 return NGX_CONF_OK;
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329 }
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330
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331 if (conf->variable == NULL) {
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332 conf->variable = prev->variable;
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333 }
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334
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335 if (conf->md5 == NULL) {
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336 conf->md5 = prev->md5;
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337 }
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338
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339 if (conf->variable == NULL && conf->md5 == NULL) {
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340 conf->secret = prev->secret;
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341 }
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342
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343 return NGX_CONF_OK;
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344 }
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345
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346
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347 static ngx_int_t
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348 ngx_http_secure_link_add_variables(ngx_conf_t *cf)
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349 {
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350 ngx_http_variable_t *var;
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351
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352 var = ngx_http_add_variable(cf, &ngx_http_secure_link_name, 0);
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353 if (var == NULL) {
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354 return NGX_ERROR;
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355 }
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356
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357 var->get_handler = ngx_http_secure_link_variable;
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358
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359 var = ngx_http_add_variable(cf, &ngx_http_secure_link_expires_name, 0);
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360 if (var == NULL) {
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361 return NGX_ERROR;
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diff changeset
362 }
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diff changeset
363
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364 var->get_handler = ngx_http_secure_link_expires_variable;
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diff changeset
365
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366 return NGX_OK;
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367 }