int av_twofish_init(struct AVTWOFISH *ctx, const uint8_t *key, int key_bits)
Initialize an AVTWOFISH context.
void av_twofish_crypt(struct AVTWOFISH *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context.