OpenAES/OpenSSL compatibility - c

Question

I'm trying to use both OpenAES and OpenSSL in C, this way:
Application 1 encodes a password using OpenAES
Application 2 decodes the password using OpenSSL
The problem is that I can't decode it, actually I'm quite surprised as OpenAES generates a
different block each time when OpenSSL or any other AES implementation I've seen always generate
the same block.
Another difference I noticed is that the OpenAES generated block is 48 bytes, when OpenSSL generates 16.
This is how I encrypt the string (OpenAES):
pCtx = oaes_alloc();
if (pCtx == NULL)
return FALSE;
oRet = oaes_key_import(pCtx, sKey, szKey);
if (oRet != OAES_RET_SUCCESS)
{
return FALSE;
}
// Get the required buffer size
oRet = oaes_encrypt(pCtx, (const uint8_t*)csSource, szLen, NULL, pOutLen);
if (oRet != OAES_RET_SUCCESS)
{
oaes_free(&pCtx);
return FALSE;
}
*ppOut = (char*)calloc(*pOutLen, sizeof(char));
oRet = oaes_encrypt(pCtx, (const uint8_t*)csSource, szLen, (uint8_t*)*ppOut, pOutLen);
if (oRet != OAES_RET_SUCCESS)
{
oaes_free(&pCtx);
free(*ppOut);
return FALSE;
}
oaes_free(&pCtx);
And this is how I decrypt it (OpenSSL):
AES_KEY kDecrypt;
AES_set_decrypt_key(sKey, 128, &kDecrypt);
AES_decrypt(pEncoded, pDecoded, &kDecrypt);
sKey being the key generated with OpenAES
pEncoded the crypted block from OpenAES
pDecoded the output data.
I can't put my finger on the problem yet...
Is there a particular way to use OpenAES so the result can be decrypted by OpenSSL, or is it just not compatible?

Answer 1

OpenAES prefixes the encrypted data with a OpenAES specific header, followed by the iv and then the encrypted data (+ padding).
As the IV seems to be generated randomly by OpenAES that explains why the data differs with each encrypt.