nginx中使用 md5
摘要：
core/ngx_md5.h 標頭檔案
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#ifndef _NGX_MD5_H_INCLUDED_
#define _NGX_MD5_H_INCLUDED_
...
core/ngx_md5.h 標頭檔案
/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#ifndef _NGX_MD5_H_INCLUDED_
#define _NGX_MD5_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
#if (NGX_HAVE_MD5)
#if (NGX_HAVE_OPENSSL_MD5_H)
#include <openssl/md5.h>
#else
#include <md5.h>
#endif
typedef MD5_CTXngx_md5_t;
#if (NGX_OPENSSL_MD5)
#define ngx_md5_initMD5_Init
#define ngx_md5_updateMD5_Update
#define ngx_md5_finalMD5_Final
#else
#define ngx_md5_initMD5Init
#define ngx_md5_updateMD5Update
#define ngx_md5_finalMD5Final
#endif
#else /* !NGX_HAVE_MD5 */
typedef struct {
uint64_tbytes;
uint32_ta, b, c, d;
u_charbuffer[64];
} ngx_md5_t;
void ngx_md5_init(ngx_md5_t *ctx);
void ngx_md5_update(ngx_md5_t *ctx, const void *data, size_t size);
void ngx_md5_final(u_char result[16], ngx_md5_t *ctx);
#endif
#endif /* _NGX_MD5_H_INCLUDED_ */
呼叫步驟
ngx_md5_init(ngx_md5_t *ctx); //對長度為size的data資料更新ctx ngx_md5_update(ngx_md5_t *ctx, const void *data, size_t size); //產生16位元組長的md5值 ngx_md5_final(u_char result[16], ngx_md5_t *ctx);
例子
static int calculate_md5(ngx_str_t *str)
{
ngx_md5_tmd5;
inti;
charmd5_buf[16], md5_buf2[32], buf[1024];
if (str->len <= 0 || str->len > sizeof(buf)) {
return -1;
}
memcpy(buf, str->data, str->len);
ngx_md5_init(&md5);
ngx_md5_update(&md5, buf, str->len);
ngx_md5_final(md5_buf, &md5);
//這裡求得的md5_buf是16位元組md5值，可以轉成32位元組的
for (i = 0; i < 16; i++){
sprintf(md5_buf2 + i*2, "%02X", md5_buf[i]);
}
return 0;
}