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recover_pk: seach with and without sha256

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This commit is contained in:
Philippe Teuwen 2020-09-24 11:58:17 +02:00
parent 55224eed75
commit 56c99d223c
1 changed files with 28 additions and 21 deletions
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49
tools/recover_pk.py
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@ -8,11 +8,8 @@ import sys
debug = False
def recover(data, signature):
def recover(data, signature, alghash=None):
recovered = set()
# Some, like Vivokey Spark1, are doing a SHA256
# alghash = "sha256"
alghash = None
if len(signature) == 32:
curve = sslcrypto.ecc.get_curve("secp128r1")
recoverable = False
@ -50,28 +47,38 @@ def recover(data, signature):
pass
return recovered
def recover_multiple(uids, sigs, alghash=None):
recovered = set()
assert len(uids) == len(sigs)
for i in range(len(uids)):
data = binascii.unhexlify(uids[i])
if debug:
print("UID (%2i): " % len(data), binascii.hexlify(data))
signature = binascii.unhexlify(sigs[i])
if debug:
print("Signature (%2i): " % len(signature), binascii.hexlify(signature))
recovered_tmp = recover(data, signature, alghash)
if i == 0:
if recovered_tmp == set():
break
else:
recovered = recovered_tmp
else:
recovered &= recovered_tmp
return recovered
if len(sys.argv) < 3 or len(sys.argv) % 2 == 0:
print("Usage: \n%s UID SIGN [UID SIGN] [...]" % sys.argv[0])
print("Example: \n%s 04ee45daa34084 ebb6102bff74b087d18a57a54bc375159a04ea9bc61080b7f4a85afe1587d73b" % sys.argv[0])
exit(1)
recovered = set()
for i in range(1, len(sys.argv), 2):
data = binascii.unhexlify(sys.argv[i])
if debug:
print("UID (%2i): " % len(data), binascii.hexlify(data))
signature = binascii.unhexlify(sys.argv[i+1])
if debug:
print("Signature (%2i): " % len(signature), binascii.hexlify(signature))
recovered_tmp = recover(data, signature)
if i == 1:
if recovered_tmp == set():
break
else:
recovered = recovered_tmp
else:
recovered &= recovered_tmp
print("Assuming no hash was used in the signature generation:")
recovered = recover_multiple(sys.argv[1:][::2], sys.argv[1:][1::2])
print("Possible uncompressed Pk(s):")
for pk in list(recovered):
print(binascii.hexlify(pk).decode('utf8'))
print("Assuming SHA-256 was used in the signature generation:")
recovered = recover_multiple(sys.argv[1:][::2], sys.argv[1:][1::2], alghash="sha256")
print("Possible uncompressed Pk(s):")
for pk in list(recovered):
print(binascii.hexlify(pk).decode('utf8'))