the decrypted data is truncated.

[lauding]

Hi:

My system is centos 5.0, the openssl version is openssl-0.9.8b-8.3.el5_0.2.
which is installed by yum mod_ssl.

I try to test  AES_set_encrypt_key method.  The sorce plaintext is
"userid=6DD024C9F68E894BEFECFE3D7A12E5BA+time=1204862415". After a
encryption and decryption process, the result turn out to be
"userid=6DD024C9F68E894BEFECFE3D7A12E5BA+time=120";  It seems that the
result's length is the exact times of the block length. I don't know why.
The following is my code. Appreciating for your answer.

 

char
szBytes[]="BF19EBA2E16593F90196272F131061B1E911FF37A7BA4019D846889FDB99EF16A
90B024EF5D4B45EDE260DD045A7376B5B2107A73EDDE27C747F91794E4E55A6";

unsigned char arrKey[] = "AaCD,F0~12345678";

unsigned int iKeyLen = strlen(arrKey);

unsigned char szSorPlainText[256]=
"userid=6DD024C9F68E894BEFECFE3D7A12E5BA+time=1204862415";

unsigned char szCipherText[256];

unsigned char szIniVec[]="12345678asdfghjk";

unsigned char szDesPlainText[256];

int iRet = 0;

int iInputLen = strlen(szSorPlainText);

int iCipherLen = 0;

int i = 0;

AES_KEY key;

memset(szCipherText, 0, 256);

iRet = AES_set_encrypt_key(arrKey, iKeyLen<<3, &key);

AES_cbc_encrypt(szSorPlainText, szCipherText, iInputLen, &key, szIniVec,
AES_ENCRYPT);

iCipherLen = strlen(szCipherText);

iRet = AES_set_decrypt_key(arrKey, iKeyLen<<3, &key);

strcpy(szIniVec, "12345678asdfghjk");

 

memset(szDesPlainText, 0, 256);

AES_cbc_encrypt(szCipherText, szDesPlainText,iCipherLen, &key, szIniVec,
AES_DECRYPT);