int av_hmac_calc(AVHMAC *ctx, const uint8_t *data, unsigned int len, const uint8_t *key, unsigned int keylen, uint8_t *out, unsigned int outlen)
Hash an array of data with a key.
int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen)
Finish hashing and output the HMAC digest.
void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen)
Initialize an AVHMAC context with an authentication key.