作者rtt2008 (rtt)
看板Linux
標題[問題] AES字串加解密(跨平台)
時間Wed May 15 12:40:36 2013
小弟利用AES作字串加解密,在windows和Linux測試成功
但是,跨平台卻無法正確解密,附上source code,麻煩各位大大給小弟一些可能的問題
Encrypt in Windows:
aes_context ctx;
char *rawData = "Hello world!";
char *secret_key = "SECRET_KEY";
unsigned char buf[16];
unsigned char key[32];
memset(buf,0,16);
memset(key,0,32);
memcpy( buf, rawData, 16);
/* Set the key */
memcpy( key, secret_key, 32);
aes_set_key( &ctx, key, 128);
/* Encrypt and save to file */
aes_encrypt( &ctx, buf, buf );
FILE *fp;
fp = fopen("SSL", "wb+");
fwrite(buf,1,16,fp);
fclose(fp);
Decrypt in Linux
aes_context ctx;
char *decryptData;
char *secret_key = "SECRET_KEY ";
unsigned char buf[16];
unsigned char key[32];
memset(buf,0,16);
memset(key,0,32);
/* Set the key */
memcpy( key, secret_key, 32);
aes_set_key( &ctx, key, 128);
/* Decrypt from file*/
FILE *fp;
fp = fopen("SSL", "rb+");
fread(buf, 1, 16, fp);
fclose(fp);
aes_decrypt( &ctx,buf,buf);
decryptData = (char*)buf;
cout<<decryptData<<endl;
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1F：推 johnjohnlin:aes_xxx 是你自己寫的函數嗎？ 05/15 14:10
2F：→ johnjohnlin:另外 secret_key 的長度根本不到 32，會根據系統的 05/15 14:11
3F：推 johnjohnlin:memory layout 之後的內容不同，所以應該會壞掉 05/15 14:13
4F：推 Thelink:Memcpy 複製不該複製的資料了，超過了。 05/15 21:31