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key2header.py
79 lines (64 loc) · 2.71 KB
/
key2header.py
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# Author Vysakh P Pillai
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from string import Template
import binascii
from cryptography import x509
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.backends import default_backend
import sys
def make_sublist_group(lst: list, grp: int) -> list:
"""
Group list elements into sublists.
make_sublist_group([1, 2, 3, 4, 5, 6, 7], 3) = [[1, 2, 3], [4, 5, 6], 7]
"""
return [lst[i:i+grp] for i in range(0, len(lst), grp)]
def do_convension(content: bytes) -> str:
hexstr = binascii.hexlify(content).decode("UTF-8")
hexstr = hexstr.upper()
array = ["0x" + hexstr[i:i + 2] + "" for i in range(0, len(hexstr), 2)]
array = make_sublist_group(array, 10)
return sum(len(a) for a in array ), "\n".join([", ".join(e) + ", " for e in array])
#Creating a Certificate
with open(sys.argv[1], "rb") as keyfile:
private_key = serialization.load_pem_private_key(
keyfile.read(),
password=None,
backend=default_backend()
)
key_der = private_key.private_bytes(
serialization.Encoding.DER,
serialization.PrivateFormat.TraditionalOpenSSL,
serialization.NoEncryption()
)
key_length , keyArray=do_convension(key_der)
keyHeaderTemplate=Template("""
/*GENERATED FILE*/
#ifndef _KEY_TEST_H_
#define _KEY_TEST_H_
static const unsigned char private_key_der[] =
{
$privKey
};
/* size is $keySize */
static const int sizeof_private_key_der = sizeof(private_key_der);
#endif /*_KEY_TEST_H_*/
""")
with open('key_header.h', 'w') as file:
file.write(keyHeaderTemplate.substitute(privKey=keyArray,keySize=key_length))