HMAC_MAX_MD_CBLOCK
if (ctx->key_length != HMAC_MAX_MD_CBLOCK)
HMAC_MAX_MD_CBLOCK - ctx->key_length);
for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK);
unsigned char pad[HMAC_MAX_MD_CBLOCK];
unsigned char key[HMAC_MAX_MD_CBLOCK];