Why is the value of the last 16 bytes of the ciphertext encrypted by OpenSSL aes_128_ecb padding witch PKCS7 not in the range of 1- AES_BLOCK_SIZE(16)?
The plainText is “1234567890123456”,16bytes. The key is “aaaaaaaaaaaaaaa”, 16bytes. using aes_128_ecb algorithm and set the padding type to PKCS7. But why is the last block size bytes value not in range 1-16? And some value is greater than AES_BLOCK_SIZE 16? Thanks for your help!