![]() append(base64Encoder.encodeToString(saltedHash)) // base64-encode the salted hash and append it. append(delimiter) // append the delimiter (watch out! don't use regex expressions as delimiter if you plan to use String.split() to isolate the salt!) Result.append(base64Encoder.encodeToString(saltBytes)) // base64-encode the salt and append it. StringBuilder result = new StringBuilder() create a StringBuilder to build the result. get java's base64 encoder for encoding.Įncoder base64Encoder = Base64.getEncoder() create the hash from our concatenated byte.īyte saltedHash = messageDigest.digest(saltAndPassword) concatenate the salt byte and the password byte.īyte saltAndPassword = concatArrays(saltBytes, passwordBytes) ![]() MessageDigest messageDigest = MessageDigest.getInstance(hashAlgorithm) MessageDigest converts our password and salt into a hash. SecureRandom secureRandom = new SecureRandom() if null has been provided as salt parameter create a new random salt. we have to do this to work with it later.īyte passwordBytes = password.getBytes() transform the password string into a byte. Return computeSaltedBase64Hash(password, null, hashAlgorithm, delimiter) īyte salt, // the salt you want to use (uses random salt if null). compute the salted hash with a random salt. String delimiter) throws NoSuchAlgorithmException // the delimiter that will be used to delimit the salt and the hash. Public static String computeSaltedBase64Hash(String password, // the password you want to hash check if the provided salted hash matches the salted hash we computed from the password and salt. String pw_saltedHash = computeSaltedBase64Hash(password, compute a new salted hash based on the provided password and salt. get the salt from the salted hash and decode it into a byte. String delimiter) throws NoSuchAlgorithmException // the delimiter that has been used to delimit the salt and the hash. String hashAlgorithm, // the algorithm you want to use. String saltedHash, // the salted hash you want to check your password against. public static boolean isHashMatch(String password, // the password you want to check. Look for if it starts with $1, $5 or $6 - it will tell you what encryption or hashing algorithm they were created with.You could use this to hash a password in java if you want to. ![]() Running the command dbget passwd:admin:passwd could also be used to show a users hashed password ( in this example the admin user) If you cat that file or run "grep admin /etc/shadow | cut -d: -f-2" from the expert command line, then you can see what type of encryption/hashing algorithm the users password starts with a $ sign and a number TIP: The encrypted password for the users are stored in the local file called /etc/shadow Link to SK for changing password hashing algorithm ( for gaia OS I also did not figure out where the expert encrypted password is stored - do any one here know how to retrieve it ? I can alternatively set the password using the hash instead:įirewall> set user admin password-hash $6$rounds=10000$RoVKjytn$rz.nZFj2dkCX9381mfYiWiGbpp5R35XCAPIBo5.UVN/lUEwEsJ/oWRMXwVFPwufEYW4xJDd4ZZ9nkFVcrDQi.īut how do I set the expert password with a hash ( so I can script / automate my installations ) ?įirewall> set expert-password-hash $6$rounds=10000$RoVKjytn$rz.nZFj2dkCX9381mfYiWiGbpp5R35XCAPIBo5.UVN/lUEwEsJ/oWRMXwVFPwufEYW4xJDd4ZZ9nkFVcrDQi. Set password-controls history-checking false TIP: To be allowed to set the same password as you had before you might need to run this first (Just remember to turn that one on again after the change to ensure passwords are not reused if you need that for compliance reasons): Then I can set the admin password hash with the new "standard" hash algorithm to the same password as i had before: I want to change it to SHA512 and do that via the clish command line with this command:įirewall> set password-controls password-hash-type SHA512 When installing a Check Point 80.40 it sets the default password hash algorithm to MD5.
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