Encrypt or decrypt a buffer using a previously initialized context.
@param ctx an AVBlowfish context
@param xl left four bytes halves of input to be encrypted
@param xr right four bytes halves of input to be encrypted
@param decrypt 0 for encryption, 1 for decryption
Encrypt or decrypt a buffer using a previously initialized context.
@param ctx an AVBlowfish context @param xl left four bytes halves of input to be encrypted @param xr right four bytes halves of input to be encrypted @param decrypt 0 for encryption, 1 for decryption