hmac_sha256       960 maint/gnulib/lib/gc-gnulib.c   hmac_sha256 (key, keylen, in, inlen, resbuf);
hmac_sha256        45 maint/gnulib/lib/hmac.h hmac_sha256 (const void *key, size_t keylen,
hmac_sha256        33 maint/gnulib/tests/test-hmac-sha256.c   if (hmac_sha256 (key, key_len, data, data_len, out) != 0)