S2N_RESULT s2n_hmac_md_from_alg()

in crypto/s2n_hmac.c [376:405]

• 29 lines of code
• 9 McCabe index (conditional complexity)

S2N_RESULT s2n_hmac_md_from_alg(s2n_hmac_algorithm alg, const EVP_MD **md)
{
    RESULT_ENSURE_REF(md);

    switch (alg) {
        case S2N_HMAC_SSLv3_MD5:
        case S2N_HMAC_MD5:
            *md = EVP_md5();
            break;
        case S2N_HMAC_SSLv3_SHA1:
        case S2N_HMAC_SHA1:
            *md = EVP_sha1();
            break;
        case S2N_HMAC_SHA224:
            *md = EVP_sha224();
            break;
        case S2N_HMAC_SHA256:
            *md = EVP_sha256();
            break;
        case S2N_HMAC_SHA384:
            *md = EVP_sha384();
            break;
        case S2N_HMAC_SHA512:
            *md = EVP_sha512();
            break;
        default:
            RESULT_BAIL(S2N_ERR_P_HASH_INVALID_ALGORITHM);
    }
    return S2N_RESULT_OK;
}