我用Python gnupg模块验证签名有问题.
使用此模块,我可以加密和签名文件：
gpg.encrypt_file(stream,encrypt_for,sign=sign_by,passphrase=key_passwd,output=file_out)
这样的加密文件可以通过命令行gpg解密,输出：
gpg: encrypted with 2048-bit ELG-E key,ID 518CD1AD,created 2011-04-14
"client"
gpg: Signature made 04/14/11 13:36:14 using DSA key ID C7C006DD
gpg: Good signature from "server"
它也可以通过Python gnupg模块解密,输出文件有解密内容,
但我无法验证签名.解密和验证的代码：
def decrypt_file(file_in,file_out,key_passwd):
gpg = gnupg.GPG()
f = open(file_in,"rb")
data = f.read()
f.close()
gpg.decrypt(data,output=file_out)
verified = gpg.verify(data)
if not verified:
raise ValueError("Signature could not be verified!")
我得到的例外：
decrypting file...
Exception in thread Thread-12:
Traceback (most recent call last):
File "c:Python26libthreading.py",line 534,in __bootstrap_inner
self.run()
File "c:Python26libthreading.py",line 486,in run
self.__target(*self.__args,**self.__kwargs)
File "c:Python26libsite-packagesgnupg.py",line 202,in _read_response
result.handle_status(keyword,value)
File "c:Python26libsite-packagesgnupg.py",line 731,in handle_status
raise ValueError("Unknown status message: %r" % key)
ValueError: Unknown status message: u'UNEXPECTED'
Traceback (most recent call last):
File "ht_gnupg.py",line 32,in
我使用来自python-gnupg-0.2.7.win32.exe的gnupg-0.2.7和ActiveStatus Python 2.6.
我也试过gpg.verify_file()但是我得到了同样的错误.文件是ASCII装甲,看起来像：
-----BEGIN PGP MESSAGE-----
Version: GnuPG v1.4.9 (MingW32)
hQIOA0EAndRRjNGtEAf/YxMQaFMnBwT3Per6ypoMYaO1AKQikRgJJMJ90a/EoZ44
...
=G6Ai
-----END PGP MESSAGE-----
如何验证命令行gpg的签名？ 最佳答案
有关示例脚本的信息,请参阅this gist,其中显示了解密时如何验证签名.
代码(截至2011-04-05)如下：
from cStringIO import StringIO
import gnupg
import logging
import os
import shutil
def generate_key(gpg,first_name,last_name,domain,passphrase=None):
"Generate a key"
params = {
'Key-Type': 'DSA','Key-Length': 1024,'Subkey-Type': 'ELG-E','Subkey-Length': 2048,'Name-Comment': 'A test user','Expire-Date': 0,}
params['Name-Real'] = '%s %s' % (first_name,last_name)
params['Name-Email'] = ("%s.%s@%s" % (first_name,domain)).lower()
if passphrase is None:
passphrase = ("%s%s" % (first_name[0],last_name)).lower()
params['Passphrase'] = passphrase
cmd = gpg.gen_key_input(**params)
return gpg.gen_key(cmd)
def init_logging():
logging.basicConfig(level=logging.DEBUG,filename="gpg.log",filemode="w",format="%(asctime)s %(levelname)-5s %(name)-10s %(threadName)-10s %(message)s")
def print_info(decrypted):
print('User name: %s' % decrypted.username)
print('Key id: %s' % decrypted.key_id)
print('Signature id: %s' % decrypted.signature_id)
#print('Signature timestamp: %s' % decrypted.sig_timestamp)
print('Fingerprint: %s' % decrypted.fingerprint)
def main():
init_logging()
if os.path.exists('keys'):
shutil.rmtree('keys')
gpg = gnupg.GPG(gnupghome='keys')
key = generate_key(gpg,"Andrew","Able","alpha.com",passphrase="andy")
andrew = key.fingerprint
key = generate_key(gpg,"Barbara","Brown","beta.com")
barbara = key.fingerprint
#First - without signing
data = 'Top secret'
encrypted = gpg.encrypt_file(StringIO(data),barbara,#sign=andrew,passphrase='andy',output='encrypted.txt')
assert encrypted.status == 'encryption ok'
# Data is in encrypted.txt. Read it in and verify/decrypt it.
data = open('encrypted.txt','r').read()
decrypted = gpg.decrypt(data,passphrase='bbrown',output='decrypted.txt')
print_info(decrypted)
#Now with signing
data = 'Top secret'
encrypted = gpg.encrypt_file(StringIO(data),sign=andrew,output='decrypted.txt')
print_info(decrypted)
if __name__ == '__main__':
main()
（编辑：李大同）
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