Hi, I have ciphertext encrypted in Java (using BouncyCastle - BC) with "AES/GCM/NoPadding" cipher.
When I tried to decrypt it using OpenSSL in a 'c' program, the last call 'EVP_DecryptFinal_ex' fails. Somehow, ERR_print_errors_fp is not printing anything either. I do have the IV that is used in the Java's encrypt. However, I don't know where BC stores the tag in the ciphertext. I tried it at the beginning and the end of the ciphertext, but it didn't help. That is, I tried both of the following in the decrypt: |IV|TAG|Ciphertext |IV|Ciphertext|TAG Both didn't work. I tried both of the following as well with the same failure: EVP_aes_256_gcm EVP_aes_128_gcm I have run out of ideas what else to try. Any help would be greatly appreciated. Thanks in advance!
