SHA 256 Different Result

python hash cryptography sha256
4af2e9eb6 picture 4af2e9eb6 · Dec 23, 2015 · Viewed 9.9k times · Source

If I invoke the command from Mac

echo hello | shasum -a 256

or from ubuntu

echo hello | sha256sum

Then I get the following result

5891b5b522d5df086d0ff0b110fbd9d21bb4fc7163af34d08286a2e846f6be03  -

I notice there is dash at the end.

But when I use Python hashlib or Java java.security.MessageDigest, they give me the same result as follows:

2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824

So, could anyone point out where I got it wrong please?

Thanks.

Python:

>>> import hashlib
>>> hashlib.sha256("hello").hexdigest()

Java:

MessageDigest md = MessageDigest.getInstance("SHA-256");
String text = "hello";
md.update(text.getBytes("UTF-8"));
byte[] digest = md.digest();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < digest.length; i++) {
    sb.append(String.format("%02x", digest[i] & 0xFF))
}
System.out.println(sb.toString());

Answer

Turn picture Turn · Dec 23, 2015

The echo commands are adding a trailing newline to your string. Try:

hashlib.sha256("hello\n").hexdigest()

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