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155 lines
3.9 KiB
155 lines
3.9 KiB
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/*
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* Copyright (C) Nginx, Inc.
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*/
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_http.h>
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#include <ngx_md5.h>
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static ngx_int_t ngx_http_md5_variable(ngx_http_request_t *r,
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ngx_http_variable_value_t *v, uintptr_t data);
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static char *ngx_http_md5(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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static ngx_command_t ngx_http_md5_commands[] = {
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{ ngx_string("md5"),
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NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2,
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ngx_http_md5,
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0,
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0,
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NULL },
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ngx_null_command
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};
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static ngx_http_module_t ngx_http_md5_module_ctx = {
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NULL, /* preconfiguration */
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NULL, /* postconfiguration */
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NULL, /* create main configuration */
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NULL, /* init main configuration */
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NULL, /* create server configuration */
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NULL, /* merge server configuration */
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NULL, /* create location configuration */
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NULL /* merge location configuration */
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};
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ngx_module_t ngx_http_md5_module = {
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NGX_MODULE_V1,
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&ngx_http_md5_module_ctx, /* module context */
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ngx_http_md5_commands, /* module directives */
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NGX_HTTP_MODULE, /* module type */
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NULL, /* init master */
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NULL, /* init module */
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NULL, /* init process */
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NULL, /* init thread */
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NULL, /* exit thread */
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NULL, /* exit process */
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NULL, /* exit master */
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NGX_MODULE_V1_PADDING
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};
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static ngx_int_t
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ngx_http_md5_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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uintptr_t data)
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{
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ngx_http_complex_value_t *cv = (ngx_http_complex_value_t *) data;
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u_char *p;
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ngx_md5_t md5;
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ngx_str_t value;
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u_char md5_buf[16];
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ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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"http md5 variable handler");
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/* evaluate complex value */
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if (ngx_http_complex_value(r, cv, &value) != NGX_OK) {
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return NGX_ERROR;
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}
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/* compute md5 */
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ngx_md5_init(&md5);
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ngx_md5_update(&md5, value.data, value.len);
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ngx_md5_final(md5_buf, &md5);
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p = ngx_pnalloc(r->pool, 32);
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if (p == NULL) {
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return NGX_ERROR;
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}
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ngx_hex_dump(p, md5_buf, 16);
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/* set variable value */
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v->len = 32;
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v->valid = 1;
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v->no_cacheable = 0;
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v->not_found = 0;
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v->data = p;
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return NGX_OK;
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}
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static char *
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ngx_http_md5(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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{
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ngx_str_t *value;
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ngx_http_variable_t *var;
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ngx_http_complex_value_t *cv;
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ngx_http_compile_complex_value_t ccv;
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value = cf->args->elts;
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if (value[1].data[0] != '$') {
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ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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"invalid variable name \"%V\"", &value[1]);
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return NGX_CONF_ERROR;
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}
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value[1].len--;
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value[1].data++;
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/* compile complex value from the argument */
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cv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
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if (cv == NULL) {
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return NGX_CONF_ERROR;
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}
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ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
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ccv.cf = cf;
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ccv.value = &value[2];
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ccv.complex_value = cv;
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if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
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return NGX_CONF_ERROR;
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}
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/* add variable */
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var = ngx_http_add_variable(cf, &value[1], 0);
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if (var == NULL) {
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return NGX_CONF_ERROR;
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}
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var->get_handler = ngx_http_md5_variable;
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var->data = (uintptr_t) cv;
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return NGX_CONF_OK;
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}
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