I would use VARCHAR for variable length data, but not with fixed length data. Because a SHA-1 value is always 160 bit long, the VARCHAR would just waste an additional byte for the length of the fixed-length field. And I also wouldn’t store the value the SHA1 is returning. Because it uses just 4 bit … Read more
require ‘digest/sha1’ Digest::SHA1.hexdigest ‘foo’
TL;DR use buffers to not use tons of memory. We get to the crux of your problem, I believe, when we consider the memory implications of working with very large files. We don’t want this bad boy to churn through 2 gigs of ram for a 2 gigabyte file so, as pasztorpisti points out, we … Read more
UPDATE You can use Apache Commons Codec (version 1.7+) to do this job for you. DigestUtils.sha1Hex(stringToConvertToSHexRepresentation) Thanks to @Jon Onstott for this suggestion. Old Answer Convert your Byte Array to Hex String. Real’s How To tells you how. return byteArrayToHexString(md.digest(convertme)) and (copied from Real’s How To) public static String byteArrayToHexString(byte[] b) { String result = … Read more
I didn’t verify this myself, but you can look at this JavaScript implementation of Java’s String.hashCode() method. Seems reasonably short. With this prototype you can simply call .hashCode() on any string, e.g. “some string”.hashCode(), and receive a numerical hash code (more specifically, a Java equivalent) such as 1395333309. String.prototype.hashCode = function() { var hash = … Read more
Picking atoms on 10 Moons An SHA-1 hash is a 40 hex character string… that’s 4 bits per character times 40… 160 bits. Now we know 10 bits is approximately 1000 (1024 to be exact) meaning that there are 1 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 … Read more
Follow this tutorial for creating SHA1 fingerprint for Google Map v2 For Debug mode: keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android for Release mode: keytool -list -v -keystore {keystore_name} -alias {alias_name} example: keytool -list -v -keystore C:\Users\MG\Desktop\test.jks -alias test On windows, when keytool command is not found, Go to your installed … Read more