Mercurial > hg > nginx-mail
diff src/http/modules/ngx_http_secure_link_module.c @ 665:0b460e61bdcd default tip
Merge with nginx 1.0.0.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 25 Apr 2011 04:22:17 +0400 |
parents | be70f83b184f |
children |
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--- a/src/http/modules/ngx_http_secure_link_module.c +++ b/src/http/modules/ngx_http_secure_link_module.c @@ -11,10 +11,22 @@ typedef struct { - ngx_str_t secret; + ngx_http_complex_value_t *variable; + ngx_http_complex_value_t *md5; + ngx_str_t secret; } ngx_http_secure_link_conf_t; +typedef struct { + ngx_str_t expires; +} ngx_http_secure_link_ctx_t; + + +static ngx_int_t ngx_http_secure_link_old_variable(ngx_http_request_t *r, + ngx_http_secure_link_conf_t *conf, ngx_http_variable_value_t *v, + uintptr_t data); +static ngx_int_t ngx_http_secure_link_expires_variable(ngx_http_request_t *r, + ngx_http_variable_value_t *v, uintptr_t data); static void *ngx_http_secure_link_create_conf(ngx_conf_t *cf); static char *ngx_http_secure_link_merge_conf(ngx_conf_t *cf, void *parent, void *child); @@ -23,6 +35,20 @@ static ngx_int_t ngx_http_secure_link_ad static ngx_command_t ngx_http_secure_link_commands[] = { + { ngx_string("secure_link"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_http_set_complex_value_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_secure_link_conf_t, variable), + NULL }, + + { ngx_string("secure_link_md5"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, + ngx_http_set_complex_value_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_secure_link_conf_t, md5), + NULL }, + { ngx_string("secure_link_secret"), NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_conf_set_str_slot, @@ -65,27 +91,122 @@ ngx_module_t ngx_http_secure_link_modul }; -static ngx_str_t ngx_http_secure_link = ngx_string("secure_link"); +static ngx_str_t ngx_http_secure_link_name = ngx_string("secure_link"); +static ngx_str_t ngx_http_secure_link_expires_name = + ngx_string("secure_link_expires"); static ngx_int_t ngx_http_secure_link_variable(ngx_http_request_t *r, - ngx_http_variable_value_t *v, uintptr_t data) + ngx_http_variable_value_t *v, uintptr_t data) { - u_char *p, *start, *end, *last; - size_t len; - ngx_int_t n; - ngx_uint_t i; - ngx_md5_t md5; + u_char *p, *last; + ngx_str_t val, hash; + time_t expires; + ngx_md5_t md5; + ngx_http_secure_link_ctx_t *ctx; ngx_http_secure_link_conf_t *conf; - u_char hash[16]; + u_char hash_buf[16], md5_buf[16]; conf = ngx_http_get_module_loc_conf(r, ngx_http_secure_link_module); - if (conf->secret.len == 0) { + if (conf->secret.len) { + return ngx_http_secure_link_old_variable(r, conf, v, data); + } + + if (conf->variable == NULL || conf->md5 == NULL) { + goto not_found; + } + + if (ngx_http_complex_value(r, conf->variable, &val) != NGX_OK) { + return NGX_ERROR; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "secure link: \"%V\"", &val); + + last = val.data + val.len; + + p = ngx_strlchr(val.data, last, ','); + expires = 0; + + if (p) { + val.len = p++ - val.data; + + expires = ngx_atotm(p, last - p); + if (expires <= 0) { + goto not_found; + } + + ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_secure_link_ctx_t)); + if (ctx == NULL) { + return NGX_ERROR; + } + + ngx_http_set_ctx(r, ctx, ngx_http_secure_link_module); + + ctx->expires.len = last - p; + ctx->expires.data = p; + } + + if (val.len > 24) { goto not_found; } + hash.len = 16; + hash.data = hash_buf; + + if (ngx_decode_base64url(&hash, &val) != NGX_OK) { + goto not_found; + } + + if (hash.len != 16) { + goto not_found; + } + + if (ngx_http_complex_value(r, conf->md5, &val) != NGX_OK) { + return NGX_ERROR; + } + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, + "secure link md5: \"%V\"", &val); + + ngx_md5_init(&md5); + ngx_md5_update(&md5, val.data, val.len); + ngx_md5_final(md5_buf, &md5); + + if (ngx_memcmp(hash_buf, md5_buf, 16) != 0) { + goto not_found; + } + + v->data = (u_char *) ((expires && expires < ngx_time()) ? "0" : "1"); + v->len = 1; + v->valid = 1; + v->no_cacheable = 0; + v->not_found = 0; + + return NGX_OK; + +not_found: + + v->not_found = 1; + + return NGX_OK; +} + + +static ngx_int_t +ngx_http_secure_link_old_variable(ngx_http_request_t *r, + ngx_http_secure_link_conf_t *conf, ngx_http_variable_value_t *v, + uintptr_t data) +{ + u_char *p, *start, *end, *last; + size_t len; + ngx_int_t n; + ngx_uint_t i; + ngx_md5_t md5; + u_char hash[16]; + p = &r->unparsed_uri.data[1]; last = r->unparsed_uri.data + r->unparsed_uri.len; @@ -145,6 +266,29 @@ not_found: } +static ngx_int_t +ngx_http_secure_link_expires_variable(ngx_http_request_t *r, + ngx_http_variable_value_t *v, uintptr_t data) +{ + ngx_http_secure_link_ctx_t *ctx; + + ctx = ngx_http_get_module_ctx(r, ngx_http_secure_link_module); + + if (ctx) { + v->len = ctx->expires.len; + v->valid = 1; + v->no_cacheable = 0; + v->not_found = 0; + v->data = ctx->expires.data; + + } else { + v->not_found = 1; + } + + return NGX_OK; +} + + static void * ngx_http_secure_link_create_conf(ngx_conf_t *cf) { @@ -158,7 +302,9 @@ ngx_http_secure_link_create_conf(ngx_con /* * set by ngx_pcalloc(): * - * conf->secret = { 0, NULL } + * conf->variable = NULL; + * conf->md5 = NULL; + * conf->secret = { 0, NULL }; */ return conf; @@ -173,6 +319,14 @@ ngx_http_secure_link_merge_conf(ngx_conf ngx_conf_merge_str_value(conf->secret, prev->secret, ""); + if (conf->variable == NULL) { + conf->variable = prev->variable; + } + + if (conf->md5 == NULL) { + conf->md5 = prev->md5; + } + return NGX_CONF_OK; } @@ -182,12 +336,19 @@ ngx_http_secure_link_add_variables(ngx_c { ngx_http_variable_t *var; - var = ngx_http_add_variable(cf, &ngx_http_secure_link, NGX_HTTP_VAR_NOHASH); + var = ngx_http_add_variable(cf, &ngx_http_secure_link_name, 0); if (var == NULL) { return NGX_ERROR; } var->get_handler = ngx_http_secure_link_variable; + var = ngx_http_add_variable(cf, &ngx_http_secure_link_expires_name, 0); + if (var == NULL) { + return NGX_ERROR; + } + + var->get_handler = ngx_http_secure_link_expires_variable; + return NGX_OK; }