HMAC_SHA1_KEY
hmac_sha1_preparekey(HMAC_SHA1_KEY(tfm), raw_key, keylen);
hmac_sha1_init(HMAC_SHA1_CTX(desc), HMAC_SHA1_KEY(desc->tfm));
hmac_sha1(HMAC_SHA1_KEY(desc->tfm), data, len, out);
ctx->ostate = HMAC_SHA1_KEY(desc->tfm)->ostate;
ctx->ostate = HMAC_SHA1_KEY(desc->tfm)->ostate;