60 lines
1.9 KiB
Python
60 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 PublicKey
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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 verify")
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parser.add_argument("--key", help="The public key to verify with (hex encoded)")
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parser.add_argument("--signature", help="The signature to verify 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 verify")
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if args.key == None:
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raise Exception("Missing public key")
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if args.signature == None:
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raise Exception("Missing signature")
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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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publicKey = PublicKey(bytes(bytearray.fromhex(args.key)), raw=True)
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signature = publicKey.ecdsa_deserialize(bytes(bytearray.fromhex(args.signature)))
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if not publicKey.ecdsa_verify(bytes(dataToSign), signature, raw=True):
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raise Exception("Signature not verified")
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print("Signature verified")
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