How to get the hash algorithm name using the OID in Java?

Question

I am trying to compute the hash of a byte array in Java. To get a MessageDigest instance, I need to inform the hash name, but I only have the hash OID. Is there another way to do this or an existing map from hash OID to hash names?

String oid = "1.2.3.4.5";
String digestAlgorithmName = getDigestAlgorithmName(oid);

MessageDigest messageDigest = MessageDigest.getInstance(digestAlgorithmName);
byte[] actualHash = messageDigest.digest(new byte[] { 0x00 });

Answer 1

I found an answer. The class org.bouncycastle.cms.CMSSignedHelper from Bouncy Castle Library has the mapping. I extracted the required snippet from there and copied here.

...
private static final Map     encryptionAlgs = new HashMap();
private static final Map     digestAlgs = new HashMap();

static
{
    encryptionAlgs.put(X9ObjectIdentifiers.id_dsa_with_sha1.getId(), "DSA");
    encryptionAlgs.put(X9ObjectIdentifiers.id_dsa.getId(), "DSA");
    encryptionAlgs.put(OIWObjectIdentifiers.dsaWithSHA1.getId(), "DSA");
    encryptionAlgs.put(PKCSObjectIdentifiers.rsaEncryption.getId(), "RSA");
    encryptionAlgs.put(PKCSObjectIdentifiers.sha1WithRSAEncryption.getId(), "RSA");
    encryptionAlgs.put(TeleTrusTObjectIdentifiers.teleTrusTRSAsignatureAlgorithm, "RSA");
    encryptionAlgs.put(X509ObjectIdentifiers.id_ea_rsa.getId(), "RSA");
    encryptionAlgs.put(CMSSignedDataGenerator.ENCRYPTION_ECDSA, "ECDSA");
    encryptionAlgs.put(X9ObjectIdentifiers.ecdsa_with_SHA2.getId(), "ECDSA");
    encryptionAlgs.put(X9ObjectIdentifiers.ecdsa_with_SHA224.getId(), "ECDSA");
    encryptionAlgs.put(X9ObjectIdentifiers.ecdsa_with_SHA256.getId(), "ECDSA");
    encryptionAlgs.put(X9ObjectIdentifiers.ecdsa_with_SHA384.getId(), "ECDSA");
    encryptionAlgs.put(X9ObjectIdentifiers.ecdsa_with_SHA512.getId(), "ECDSA");
    encryptionAlgs.put(CMSSignedDataGenerator.ENCRYPTION_RSA_PSS, "RSAandMGF1");
    encryptionAlgs.put(CryptoProObjectIdentifiers.gostR3410_94.getId(), "GOST3410");
    encryptionAlgs.put(CryptoProObjectIdentifiers.gostR3410_2001.getId(), "ECGOST3410");
    encryptionAlgs.put("1.3.6.1.4.1.5849.1.6.2", "ECGOST3410");
    encryptionAlgs.put("1.3.6.1.4.1.5849.1.1.5", "GOST3410");

    digestAlgs.put(PKCSObjectIdentifiers.md5.getId(), "MD5");
    digestAlgs.put(OIWObjectIdentifiers.idSHA1.getId(), "SHA1");
    digestAlgs.put(NISTObjectIdentifiers.id_sha224.getId(), "SHA224");
    digestAlgs.put(NISTObjectIdentifiers.id_sha256.getId(), "SHA256");
    digestAlgs.put(NISTObjectIdentifiers.id_sha384.getId(), "SHA384");
    digestAlgs.put(NISTObjectIdentifiers.id_sha512.getId(), "SHA512");
    digestAlgs.put(PKCSObjectIdentifiers.sha1WithRSAEncryption.getId(), "SHA1");
    digestAlgs.put(PKCSObjectIdentifiers.sha224WithRSAEncryption.getId(), "SHA224");
    digestAlgs.put(PKCSObjectIdentifiers.sha256WithRSAEncryption.getId(), "SHA256");
    digestAlgs.put(PKCSObjectIdentifiers.sha384WithRSAEncryption.getId(), "SHA384");
    digestAlgs.put(PKCSObjectIdentifiers.sha512WithRSAEncryption.getId(), "SHA512");
    digestAlgs.put(TeleTrusTObjectIdentifiers.ripemd128.getId(), "RIPEMD128");
    digestAlgs.put(TeleTrusTObjectIdentifiers.ripemd160.getId(), "RIPEMD160");
    digestAlgs.put(TeleTrusTObjectIdentifiers.ripemd256.getId(), "RIPEMD256");
    digestAlgs.put(CryptoProObjectIdentifiers.gostR3411.getId(),  "GOST3411");
    digestAlgs.put("1.3.6.1.4.1.5849.1.2.1",  "GOST3411");
}

String getDigestAlgName(String digestAlgOID) {
    String algName = (String)digestAlgs.get(digestAlgOID);

    if (algName != null)
    {
        return algName;
    }

    return digestAlgOID;
}

String getEncryptionAlgName(String encryptionAlgOID) {
    String algName = (String)encryptionAlgs.get(encryptionAlgOID);

    if (algName != null)
    {
        return algName;
    }

    return encryptionAlgOID;
}

MessageDigest getDigestInstance(String algorithm, String provider) 
    throws NoSuchProviderException, NoSuchAlgorithmException {
    if (provider != null)
    {
        try
        {
            return MessageDigest.getInstance(algorithm, provider);
        }
        catch (NoSuchAlgorithmException e)
        {
            return MessageDigest.getInstance(algorithm); // try rolling back
        }
    }
    else
    {
        return MessageDigest.getInstance(algorithm);
    }
}

Answer 2

The class org.bouncycastle.CMSSignedGenerator has constants for each of its supported algorithms. Its constants are public, so they're easier to use than package-only accessible CMSSignedHelper.