OpenSSL create SHA hash from shell stdin

Question

How to generate the SHA-512 hash with OpenSSL from command line without using a file?

I've tried this

echo "password" | openssl dgst -sha512

but the hash looks wrong (compared with http://hash.online-convert.com/sha512-generator).

The link above to verify SHA hash is broken. [Try this](https://fe-tool.com/en-us/hash/sha512?inputText=password) — cwtuan, Oct 11 '22 at 08:10

score 28 · Accepted Answer · edited Jan 28 '16 at 02:40

28

Try echo -n "password".

What's happening is the new line character(s) that echo adds to the end of the string are getting hashed. The -n to echo suppresses this behavior.

edited Jan 28 '16 at 02:40

slm

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answered Jun 16 '12 at 18:55

Dave G

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Or `openssl dgst -sha512 <<< $password_to_hash` – randomuser5215 Mar 28 '19 at 16:49

score 4 · Answer 2 · answered Apr 01 '19 at 18:29

4

If you're using MacOS, you might stumble upon a case where the echo is ignoring the -n argument. To workaround that, call the binary directly:

/bin/echo -n "password" | openssl sha512

answered Apr 01 '19 at 18:29

Micho

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OpenSSL create SHA hash from shell stdin

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