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mailu/core/admin/mailu/dkim.py

22 lines
619 B
Python

""" No crypto operation is done on keys.
They are thus represented as ASCII armored PEM.
"""
from OpenSSL import crypto
def gen_key(key_type=crypto.TYPE_RSA, bits=2048):
""" Generate and return a new RSA key.
"""
key = crypto.PKey()
key.generate_key(key_type, bits)
return crypto.dump_privatekey(crypto.FILETYPE_PEM, key)
def strip_key(pem):
""" Return only the b64 part of the ASCII armored PEM.
"""
key = crypto.load_privatekey(crypto.FILETYPE_PEM, pem)
public_pem = crypto.dump_publickey(crypto.FILETYPE_PEM, key)
return public_pem.replace(b"\n", b"").split(b"-----")[2]