What does SHA256 hexadecimal string look like?

Question

I have been looking all over google to find what the hex output of a SHA256 hash looks like. But I just can't seem to find it.

So what does a SHA256 hash look like when it's converted to hexadecimal?

score 47 · Accepted Answer · edited Jul 22 '19 at 10:18

47

A SHA256 hash represented in hexadecimal consists of 64 hexadecimal characters, i.e. it matches the following regex:

^[A-Fa-f0-9]{64}$

Example:

7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069

edited Jul 22 '19 at 10:18

Wiktor Stribiżew

answered Jul 08 '11 at 20:41

dtb

In .NET it may also contain hyphens between the bytes. See http://dotnetfiddle.net/qrZsni – Thomas Weller Jan 28 '14 at 15:45
11

Note that the above regex will also match longer strings which happen to contain a sha256 hexadecimal hash. ^[A-Fa-f0-9]{64}$ will strictly match – Olivier Lalonde May 02 '16 at 20:11
`\b[A-Fa-f0-9]{64}\b` if you need to match a sha256 "word" within a text – Ricardo Apr 24 '17 at 23:44
1

Turn off case sensitivity with `i` and you don't have to do "A-Fa-f" e.g. `/^[0-9a-f]{64}$/i` – cameck Mar 23 '18 at 15:38

1 Answers1