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handle OpenSSL.EC_KEY_get0_group() exception

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Jonathan Warren 2015-02-06 16:31:23 -05:00
parent d0676233ed
commit 642c5858f4
1 changed files with 32 additions and 16 deletions
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16
src/highlevelcrypto.py
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@ -40,6 +40,15 @@ def verify(msg,sig,hexPubkey):
# Does an EC point multiplication; turns a private key into a public key. # Does an EC point multiplication; turns a private key into a public key.
def pointMult(secret): def pointMult(secret):
while True:
try:
"""
Evidently, this type of error can occur very rarely:
File "highlevelcrypto.py", line 54, in pointMult
group = OpenSSL.EC_KEY_get0_group(k)
WindowsError: exception: access violation reading 0x0000000000000008
"""
k = OpenSSL.EC_KEY_new_by_curve_name(OpenSSL.get_curve('secp256k1')) k = OpenSSL.EC_KEY_new_by_curve_name(OpenSSL.get_curve('secp256k1'))
priv_key = OpenSSL.BN_bin2bn(secret, 32, None) priv_key = OpenSSL.BN_bin2bn(secret, 32, None)
group = OpenSSL.EC_KEY_get0_group(k) group = OpenSSL.EC_KEY_get0_group(k)
@ -57,3 +66,10 @@ def pointMult(secret):
OpenSSL.BN_free(priv_key) OpenSSL.BN_free(priv_key)
OpenSSL.EC_KEY_free(k) OpenSSL.EC_KEY_free(k)
return mb.raw return mb.raw
except Exception as e:
import traceback
import time
traceback.print_exc()
time.sleep(0.2)