How to specify hash algorithm when updating LDAP via Java?

» java » How to specify hash algorithm when updating LDAP via Java?

By : Big LUUIE

Date : January 10 2021, 01:57 PM

Hope that helps Is there a way to specify the hash algorithm (MD5, SHA1, etc.) to use for storing the passwords when you update an Open LDAP directory using Java APIs with code like this: , Something along these lines should do it: (MD5) Shown

code :

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What hash algorithm does .net utilise? What about java?

By : Jeff Crow

Date : March 29 2020, 07:55 AM

may help you . The hash function is not built into the hash table; the hash table invokes a method on the key object to compute the hash. So, the hash function varies depending on the type of key object.
In Java, a List is not a hash table (that is, it doesn't extend the Map interface). One could implement a List with a hash table internally (a sparse list, where the list index is the key into the hash table), but such an implementation is not part of the standard Java library.

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

By : Rajesh

Date : March 29 2020, 07:55 AM

it helps some times 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.

code :

...
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);
    }
}

LDAP password hash matching in Java

By : Noob

Date : March 29 2020, 07:55 AM

it fixes the issue That is base64 encoding. try it here

Updating ldap from java

By : sof_user

Date : March 29 2020, 07:55 AM

this will help That assumption is indeed wrong.
LDAP is not a Windows-specific technology. All you need in order to update directory data is the ability to connect to the appropriate port (389 for unencrypted or TLS-encrypted connections, or 636 for SSL-encrypted connections) and bind to the LDAP server using the credentials of a user that has sufficient access to modify the attributes you have in mind.

Rolling Hash Algorithm for Rabin-Karp Algorithm Java

By : Soheil Darestany

Date : March 29 2020, 07:55 AM

this will help You have a couple of fundamental problems in your code.
The first one is here: patternHash += int_mod(patternHash * base + pattern[i], primeMod); It is duplicated on a few more places.

code :

    segmentHash += int_mod(segmentHash * base + text[i + pattern.length -1],primeMod);
    segmentHash -= int_mod(segmentHash * base + text[i-1], primeMod);