I know the string "foobar" generates the SHA-256 hash c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2 using
http://hash.online-convert.com/sha256-generator
However the command line shell:
hendry@x201 ~$ echo foobar | sha256sum
aec070645fe53ee3b3763059376134f058cc337247c978add178b6ccdfb0019f -
Generates a different hash. What am I missing?
If the command sha256sum is not available (on Mac OS X v10.9 (Mavericks) for example), you can use:
echo -n "foobar" | shasum -a 256
For the sha256 hash in base64, use:
echo -n foo | openssl dgst -binary -sha256 | openssl base64
echo -n foo | openssl dgst -binary -sha256 | openssl base64
C+7Hteo/D9vJXQ3UfzxbwnXaijM=
Use printf instead of echo to avoid adding an extra newline.
printf foobar | sha256sum
For an arbitrary string, the %s format specifier should be used.
printf '%s' 'somestring' | sha256sum