Python write_string_to_file Examples

Example #1

def create_signed_data(key_path, signed_data_pem_path, cert_path):
  # Use some random data as the message.
  data_to_sign = os.urandom(256)

  sha1_signature = sign_data(key_path, data_to_sign, 'sha1')
  sha256_signature = sign_data(key_path, data_to_sign, 'sha256')

  # Write a final PEM file which incorporates the message, and signatures.
  signed_data_pem_data = """
These signatures were generated using the device certificate key from:
  %s

The data being signed is a bunch of random data.

-----BEGIN MESSAGE-----
%s
-----END MESSAGE-----

Signature Algorithm: RSASSA PKCS#1 v1.5 with SHA1

-----BEGIN SIGNATURE SHA1-----
%s
-----END SIGNATURE SHA1-----

Signature Algorithm: RSASSA PKCS#1 v1.5 with SHA256

-----BEGIN SIGNATURE SHA256-----
%s
-----END SIGNATURE SHA256----- """ % (cert_path,
       base64.b64encode(data_to_sign),
       base64.b64encode(sha1_signature),
       base64.b64encode(sha256_signature))

  common.write_string_to_file(signed_data_pem_data, signed_data_pem_path)

Example #2

def sign_data(key_path, data_to_sign, digest):
  """Returns the signature of |data_to_sign| using the key at |key_path| and
  the digest algorithm |digest|. The |digest| parameter should be either
  "sha256" or "sha1"""

  data_to_sign_path = 'out/tmp_data_to_sign'
  signed_data_path = 'out/tmp_signed_data'

  common.write_string_to_file(data_to_sign, data_to_sign_path)

  subprocess.check_call(['openssl', 'dgst', '-' + digest,
                         '-sign', key_path,
                         '-out', signed_data_path,
                         data_to_sign_path ])

  signature = common.read_file_to_string(signed_data_path)

  # Delete the temporary files.
  os.remove(data_to_sign_path)
  os.remove(signed_data_path)

  return signature

Example #3

File: generate-certs.py Project: Samsung/ChromiumGStreamerBackend

def write_cert_to_file(cert, filename):
  common.write_string_to_file(
      "Generated by %s.\n"
      "Refer to generator script docstring for details.\n%s" % (
          sys.argv[0], cert.get_cert_pem()),
      filename)

Example #4

File: generate-certs.py Project: Jubata/Cheetah-browser

def write_cert_to_file(cert, filename):
  common.write_string_to_file(
      "Generated by %s.\n"
      "Refer to generator script docstring for details.\n%s" % (
          sys.argv[0], cert.get_cert_pem()),
      filename)

Example #5

File: generate-certs.py Project: bopopescu/proto-quic

import common

common.set_default_validity_range(common.JANUARY_1_2015_UTC,
                                  common.JANUARY_1_2021_UTC)

# Generate the keys -- the same key is used for all intermediates and end entity
# certificates.
root_key = common.get_or_generate_rsa_key(2048, common.create_key_path('root'))
i_key = common.get_or_generate_rsa_key(2048, common.create_key_path('i'))
target_key = common.get_or_generate_rsa_key(2048,
                                            common.create_key_path('target'))

# Self-signed root certificate.
root = common.create_self_signed_root_certificate('Root')
root.set_key(root_key)
common.write_string_to_file(root.get_cert_pem(), 'root.pem')

# Intermediate certificates. All have the same subject and key.
i_base = common.create_intermediate_certificate('I', root)
i_base.set_key(i_key)
common.write_string_to_file(i_base.get_cert_pem(), 'i.pem')

i2 = common.create_intermediate_certificate('I', root)
i2.set_key(i_key)
common.write_string_to_file(i2.get_cert_pem(), 'i2.pem')

i3 = common.create_intermediate_certificate('I', root)
i3.set_key(i_key)
common.write_string_to_file(i3.get_cert_pem(), 'i3.pem')

# More Intermediate certificates, which are just to generate the proper config

Example #6

File: generate-certs.py Project: Samsung/ChromiumGStreamerBackend

import os
import sys
sys.path += [os.path.join('..', 'verify_certificate_chain_unittest')]

import common


# Self-signed root certificate. Not saved to a .pem since the test doesn't need
# it.
root = common.create_self_signed_root_certificate('Root')


# Intermediate certificates. All have the same subject and key.
i_base = common.create_intermediate_certificate('I', root)
common.write_string_to_file(i_base.get_cert_pem(), 'i.pem')

i2 = common.create_intermediate_certificate('I', root)
i2.set_key_path(i_base.get_key_path())
common.write_string_to_file(i2.get_cert_pem(), 'i2.pem')

i3 = common.create_intermediate_certificate('I', root)
i3.set_key_path(i_base.get_key_path())
common.write_string_to_file(i3.get_cert_pem(), 'i3.pem')


# More Intermediate certificates, which are just to generate the proper config
# files so the target certs will have the desired Authority Information Access
# values. These ones aren't saved to files.
i_no_aia = common.create_intermediate_certificate('I', root)
i_no_aia.set_key_path(i_base.get_key_path())