61 lines
1.9 KiB
Python
61 lines
1.9 KiB
Python
"""
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*******************************************************************************
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* Ledger Blue
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* (c) 2016 Ledger
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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********************************************************************************
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"""
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from .hexParser import IntelHexParser
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from .hexParser import IntelHexPrinter
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from .ecWrapper import PrivateKey
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import hashlib
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import binascii
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import argparse
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def auto_int(x):
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return int(x, 0)
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parser = argparse.ArgumentParser()
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parser.add_argument("--hex", help="Hex file to be signed")
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parser.add_argument("--key", help="The private key to sign with (hex encoded)")
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args = parser.parse_args()
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if args.hex == None:
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raise Exception("Missing hex filename to sign")
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if args.key == None:
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raise Exception("Missing private key")
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# parse
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parser = IntelHexParser(args.hex)
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# prepare data
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m = hashlib.sha256()
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# consider areas are ordered by ascending address and non-overlaped
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for a in parser.getAreas():
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m.update(a.data)
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dataToSign = m.digest()
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MASTER_PRIVATE = bytearray.fromhex(args.key)
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testMaster = PrivateKey(bytes(MASTER_PRIVATE))
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#testMasterPublic = bytearray(testMaster.pubkey.serialize(compressed=False))
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signature = testMaster.ecdsa_sign(bytes(dataToSign), raw=True)
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# test signature before printing it
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if testMaster.pubkey.ecdsa_verify(dataToSign, signature, raw=True):
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#print("Signer's public: " + binascii.hexlify(testMasterPublic))
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print(str(testMaster.ecdsa_serialize(signature)).encode('hex'))
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