Created
June 7, 2011 23:39
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MD5 in scala
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| object MD5 { | |
| def hash(s: String) = { | |
| val m = java.security.MessageDigest.getInstance("MD5") | |
| val b = s.getBytes("UTF-8") | |
| m.update(b, 0, b.length) | |
| new java.math.BigInteger(1, m.digest()).toString(16) | |
| } | |
| } |
Yes, @goofyz is right. This does not work for hashes with leading zeros, they are skipped. For example if you caluclate hash("iwrupvqb346386") you'll get 45c5e2b3911eb937d9d8c574f09 instead of 0000045c5e2b3911eb937d9d8c574f09 .
As a remedy, you could do new java.math.BigInteger(1, m.digest()).toString(16).reverse.padTo(32, "0").reverse.mkString in the last line.
On StackOverflow you find code like m.digest().map("%02x".format(_)).mkString which also works but is slower.
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If
0is the first character, this function will omit it and give an incorrect result.