This is bcrypt: Generate a random salt. A “cost” factor has been pre-configured. Collect a password. Derive an encryption key from the password using the salt and cost factor. Use it to encrypt a well-known string. Store the cost, salt, and cipher text. Because these three elements have a known length, it’s easy to concatenate … Read more
String.prototype.hashCode = function() { var hash = 0, i, chr; if (this.length === 0) return hash; for (i = 0; i < this.length; i++) { chr = this.charCodeAt(i); hash = ((hash << 5) – hash) + chr; hash |= 0; // Convert to 32bit integer } return hash; }; Source: http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
The MessageDigest class can provide you with an instance of the MD5 digest. When working with strings and the crypto classes be sure to always specify the encoding you want the byte representation in. If you just use string.getBytes() it will use the platform default. (Not all platforms use the same defaults) import java.security.*; .. … Read more
DISCLAIMER: This answer was written in 2008. Since then, PHP has given us password_hash and password_verify and, since their introduction, they are the recommended password hashing & checking method. The theory of the answer is still a good read though. TL;DR Don’ts Don’t limit what characters users can enter for passwords. Only idiots do this. … Read more