CODEWITHSUNDEEP
linuxperlunixencryptionhash
rkj
rkj

Reputation: 711

sha256sum hashing of email address

I am trying to use sha256sum hashing command to hash email address.

$ echo -n example@gmail.com | sha256sum | awk '{print $1}'
264e53d93759bde067fd01ef2698f98d1253c730d12f021116f02eebcfa9ace6

Now I want to apply the same on an input file with email_address only,but the below shows a different hash and looks like CAT is the culprit here,let me know how to overcome the issue.

$ echo -n | cat test.txt | sha256sum | awk '{print $1}'
5c98fab97a397b50d060913638c18f7fd42345248bb973c486b6347232e8013e

ideally ,I would like to see below if the test.txt has only one record example@gmail.com (it can have n number of email address)

example@gmail.com|264e53d93759bde067fd01ef2698f98d1253c730d12f021116f02eebcfa9ace6

Upvotes: 0

Views: 687

Answers (1)

Sean Bright
Sean Bright

Reputation: 120704

It's a bit unclear, but I think your test.txt file looks like this:

example@gmail.com
rkj@stackoverflow.com
sean@stackoverflow.com

And you want to produce the output:

example@gmail.com|264e53d93759bde067fd01ef2698f98d1253c730d12f021116f02eebcfa9ace6
rkj@stackoverflow.com|2a583d8e55db9bac7247cac8dc4b52780010583217844e864e159c458ce0185c
sean@stackoverflow.com|797f02327b00f12486f2ed5e85e61680ecb75a0f969b54a627e329506aaf595c

If that is the case, this will do it:

while read email; do SHA=$(echo -n $email | sha256sum | awk '{print $1}'); echo "$email|$SHA"; done < test.txt

In your initial command, you are using echo -n which prints the arguments without a trailing newline. So you are getting the hash of just the e-mail address itself. Once you start working with a file, every line is going to have a newline on it, so for each line you have to strip off the newline and get the hash. That is effectively what my suggested solution is doing.

Upvotes: 1

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