extract-pem.py

import sys
from OpenSSL import crypto

def generate_pem_file(string, filename):
    with open(filename, 'w') as fl:
        fl.write(string)

def extract_pem_certificate():
    path_file = sys.argv[1]
    password = sys.argv[2]

    try:
        certificate = open(path_file, 'r').read()
    except IOError:
        print('Não foi possivel encontrar o arquivo')
        return False

    try:
        cert = crypto.load_pkcs12(certificate, password)
    except crypto.Error:
        print('Senha incorreta para o certificado.')
        return False

    private_key = cert.get_privatekey()
    x509 = cert.get_certificate()
    cert_pem = crypto.dump_certificate(crypto.FILETYPE_PEM, x509)
    key_pem = crypto.dump_privatekey(crypto.FILETYPE_PEM, private_key)

    generate_pem_file(cert_pem, 'certificate.pem')
    generate_pem_file(key_pem, 'private_key.pem')

    print('Certificado e chave extraidos com sucesso.')
    return True

if __name__ == '__main__':
    extract_pem_certificate()