from cryptography.x509 import load_pem_x509_certificate
from cryptography.hazmat.primitives.serialization import (
load_pem_private_key, load_pem_public_key, load_ssh_public_key,
)
from cryptography.hazmat.backends import default_backend
from authlib.common.encoding import to_bytes
def load_pem_key(raw, ssh_type=None, key_type=None, password=None):
raw = to_bytes(raw)
if ssh_type and raw.startswith(ssh_type):
return load_ssh_public_key(raw, backend=default_backend())
if key_type == 'public':
return load_pem_public_key(raw, backend=default_backend())
if key_type == 'private' or password is not None:
return load_pem_private_key(raw, password=password, backend=default_backend())
if b'PUBLIC' in raw:
return load_pem_public_key(raw, backend=default_backend())
if b'PRIVATE' in raw:
return load_pem_private_key(raw, password=password, backend=default_backend())
if b'CERTIFICATE' in raw:
cert = load_pem_x509_certificate(raw, default_backend())
return cert.public_key()
try:
return load_pem_private_key(raw, password=password, backend=default_backend())
except ValueError:
return load_pem_public_key(raw, backend=default_backend())