amazon-web-servicesaws-lambdam2crypto

Script works on AWS EC2, but not on AWS Lambda after zipping

I am creating a simple AWS Lambda function using M2Crypto library. I followed the steps for creating deployment package from here. The lambda function works perfectly on an EC2 Linux instance (AMI).

This is my Function definition:

CloudOAuth.py

from M2Crypto import BIO, RSA, EVP
def verify(event, context):
  pem = "-----BEGIN PUBLIC KEY-----\n{0}\n-----END PUBLIC KEY-----".format("hello")
  bio = BIO.MemoryBuffer(str.encode(pem))
  print(bio)
  return

Deployment Package structure:

Lambda Deployment Package skeleton

When I run the Lambda, I get the following issue and I also tried including libcrypto.so.10 from /lib64 directory, but didn't help.

Issue when running Lambda

/var/task/M2Crypto/_m2crypto.so: symbol sk_deep_copy, version libcrypto.so.10 not defined in file libcrypto.so.10 with link time reference`

Python: 2.7
M2Crypto: 0.27.0
Solution

  • I would guess that the M2Crypto was built with different version of OpenSSL than what's on Lambda. See the relevant code. If not (the upstream maintainer speaking here), please, file a bug at https://gitlab.com/m2crypto/m2crypto/issues