sha1

SHA1 hashing in SQLite: how?

There is no such function built into SQLite3. But you could define a user function e.g. with sqlite3_create_function if you’re using the C interface, and implement SHA-1 with that. (But if you’re having a programmable interface perhaps you could just SHA-1 the password outside of the SQL engine.) You could also try to find / … Read more

A Regex to match a SHA1

You can consider the SHA1 hashes to be completely random, so this reduces to a matter of probabilities. The probability that a given digit is not a number is 6/16, or 0.375. The probability that three SHA1 digits are all not numbers is 0.375 ** 3, or 0.0527 (5% ish). At six digits, this reduces … Read more

How to generate an HMAC in Java equivalent to a Python example?

HmacSHA1 seems to be the algorithm name you need: SecretKeySpec keySpec = new SecretKeySpec( “qnscAdgRlkIhAUPY44oiexBKtQbGY0orf7OV1I50”.getBytes(), “HmacSHA1”); Mac mac = Mac.getInstance(“HmacSHA1”); mac.init(keySpec); byte[] result = mac.doFinal(“foo”.getBytes()); BASE64Encoder encoder = new BASE64Encoder(); System.out.println(encoder.encode(result)); produces: +3h2gpjf4xcynjCGU5lbdMBwGOc= Note that I’ve used sun.misc.BASE64Encoder for a quick implementation here, but you should probably use something that doesn’t depend on the Sun … Read more

Hashing with SHA1 Algorithm in C#

For those who want a “standard” text formatting of the hash, you can use something like the following: static string Hash(string input) { using (SHA1Managed sha1 = new SHA1Managed()) { var hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(input)); var sb = new StringBuilder(hash.Length * 2); foreach (byte b in hash) { // can be “x2” if you want lowercase … Read more