Hi all,
I'm new on openssl development, so I'm sorry if that a "beginner's"
question . I'm trying to decrypt a *base64 AES CBC* encrypted data (using
the *AES_cbc_encrypt*). The base64 encoding/decoding works fine. the code
below works depending on data length:
- The example with :
data ="This is a long very long test" works fine, I have the good decrypted
data.
- The second one doesn't work... I read somewhere that's depending of
data padding... Can you
......
int main(int argc, char *argv[])
{
unsigned char key[] = {0,1,2,3,4,5,6,7,8,9,0,'a','b','c','d','e'};
unsigned char iv[] = {0,1,2,3,4,5,6,7,8,9,0,'a','b','c','d','e'};
unsigned char iv1[] = {0,1,2,3,4,5,6,7,8,9,0,'a','b','c','d','e'};
int KeyLength=16;
int BufferLength=60;
unsigned char* data ="This is a test";
//unsigned char* data ="This is a long very long test";
unsigned char* buffer = (char *) malloc(BufferLength);
unsigned char* buffer1 = (char *) malloc(BufferLength);
AES_KEY aeskeyEnc, aeskeyDec;
AES_set_encrypt_key (key, KeyLength*8, &aeskeyEnc);
AES_set_decrypt_key (key, KeyLength*8, &aeskeyDec);
/*Encrypting...*/
AES_cbc_encrypt(data, buffer, 16, &aeskeyEnc, iv, AES_ENCRYPT);
//AES_cbc_encrypt(data, buffer, strlen(data), &aeskeyEnc, iv,
AES_ENCRYPT);
printf("Encrypted data: %s\n",buffer);
/*To Base64 encrypted data */
char *base64Buffer = base64(buffer, strlen(buffer));
printf("Base64 Encrypted data: %s\n",base64Buffer);
/* Unbase64 of encrypted data*/
char* test_1 = strcat(base64Buffer,"\n\0");
char* unBase64 = unbase64(base64Buffer, strlen(base64Buffer));
/*Decypting unBase64...*/
AES_cbc_encrypt(unBase64, buffer1,16, &aeskeyDec, iv1, AES_DECRYPT);
//AES_cbc_encrypt(unBase64, buffer1, strlen(unBase64), &aeskeyDec, iv1,
AES_DECRYPT);
printf("Decrypted data: %s \n",buffer1);
return(0);
}
--
Karim Bendadda
