我正在尝试在python3上创建一个非分离的签名。我目前有代码在python2上用m2crypto执行此操作,但m2crypto不适用于python3。
我一直在尝试rsa,pycrypto和openssl,但还没有看到如何找到。
这是等效的OpenSSL命令:
openssl smime -sign -signer $CRTFILE -inkey $KEYFILE -outformDER -nodetach
这是nodetach
选项,我无法模仿rsa,pyopenssl或pycrypto。
有没有人在python3上这样做?我想尽可能避免使用Popen + openssl。
答案 0 :(得分:1)
我实际上最终用OpenSSL.crypto
解决了这个问题,尽管有一些内部方法:
from OpenSSL import crypto
PKCS7_NOSIGS = 0x4 # defined in pkcs7.h
def create_embeded_pkcs7_signature(data, cert, key):
"""
Creates an embeded ("nodetached") pkcs7 signature.
This is equivalent to the output of::
openssl smime -sign -signer cert -inkey key -outform DER -nodetach < data
:type data: bytes
:type cert: str
:type key: str
""" # noqa: E501
assert isinstance(data, bytes)
assert isinstance(cert, str)
try:
pkey = crypto.load_privatekey(crypto.FILETYPE_PEM, key)
signcert = crypto.load_certificate(crypto.FILETYPE_PEM, cert)
except crypto.Error as e:
raise ValueError('Certificates files are invalid') from e
bio_in = crypto._new_mem_buf(data)
pkcs7 = crypto._lib.PKCS7_sign(
signcert._x509, pkey._pkey, crypto._ffi.NULL, bio_in, PKCS7_NOSIGS
)
bio_out = crypto._new_mem_buf()
crypto._lib.i2d_PKCS7_bio(bio_out, pkcs7)
signed_data = crypto._bio_to_string(bio_out)
return signed_data