# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import sys
from pyasn1.codec.der
import decoder
from pyasn1.type
import univ
from pyasn1_modules
import pem
def public_key_to_string(file, name):
out =
"static const unsigned char " + name +
"[65] = { "
with open(file)
as f:
substrate = pem.readPemFromFile(
f,
"-----BEGIN PUBLIC KEY-----",
"-----END PUBLIC KEY-----"
)
key = decoder.decode(substrate)
ident = key[0][0]
assert ident[0] == univ.ObjectIdentifier(
"1.2.840.10045.2.1"
),
"should be an ECPublicKey"
assert ident[1] == univ.ObjectIdentifier(
"1.2.840.10045.3.1.7"
),
"should be a EcdsaP256 key"
bits = key[0][1]
assert isinstance(bits, univ.BitString),
"Should be a bit string"
assert len(bits) == 520,
"Should be 520 bits (65 bytes)"
for byte
in bits.asOctets():
out += hex(byte) +
", "
out +=
"};"
return out
def generate(output, test_key, prod_key):
output.write(public_key_to_string(test_key,
"kTestKey"))
output.write(
"\n\n")
output.write(public_key_to_string(prod_key,
"kProdKey"))
if __name__ ==
"__main__":
generate(sys.stdout, *sys.argv[1:])
