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cevaris/generate_key.sh

Last active May 5, 2024 19:34
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Sign and Verify using Python pycrypto
Raw
generate_key.sh
#!/usr/bin/env bash
# Generate RSA private key
openssl genrsa -out private_key.pem 1024
Raw
sign_verify.py
#!/usr/bin/env python
from base64 import (
b64encode,
b64decode,
)
from Crypto.Hash import SHA256
from Crypto.Signature import PKCS1_v1_5
from Crypto.PublicKey import RSA
message = "I want this stream signed"
digest = SHA256.new()
digest.update(message)
# Read shared key from file
private_key = False
with open ("private_key.pem", "r") as myfile:
private_key = RSA.importKey(myfile.read())
# Load private key and sign message
signer = PKCS1_v1_5.new(private_key)
sig = signer.sign(digest)
# Load public key and verify message
verifier = PKCS1_v1_5.new(private_key.publickey())
verified = verifier.verify(digest, sig)
assert verified, 'Signature verification failed'
print 'Successfully verified message'
@ErpMstar
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Hi
I am using same using same Python code for getting md5 digest. And also doing similar to this in JavaScript to get md5 digest.
But getting different values for same message. I am confused, how to check which one correct and why the other one is wrong.
Any idea how to fix this?

@cevaris
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cevaris commented Jun 27, 2021 •
edited
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Any idea how to fix this?
@ErpMstar TBH, i have no idea.

You would not need to use this script for just calculating MD5 digests.
Perhaps these links can help..

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