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__pycache__	-	Open
DSA.py	21.85 MB	View DL Edit
DSA.pyi	1.35 MB	View DL Edit
ECC.py	63.25 MB	View DL Edit
ECC.pyi	2.5 MB	View DL Edit
ElGamal.py	8.41 MB	View DL Edit
ElGamal.pyi	674 B	View DL Edit
RSA.py	29.26 MB	View DL Edit
RSA.pyi	1.98 MB	View DL Edit
_ec_ws.abi3.so	690.9 MB	View DL Edit
_ed448.abi3.so	50.15 MB	View DL Edit
_ed25519.abi3.so	36.18 MB	View DL Edit
_openssh.py	5.01 MB	View DL Edit
_openssh.pyi	324 B	View DL Edit
_x25519.abi3.so	23.59 MB	View DL Edit
__init__.py	3.07 MB	View DL Edit
__init__.pyi	0 B	View DL Edit

Edit file: /opt/imunify360/venv/lib/python3.11/site-packages/Crypto/PublicKey/__init__.py

# -*- coding: utf-8 -*-
#
# ===================================================================
# The contents of this file are dedicated to the public domain.  To
# the extent that dedication to the public domain is not available,
# everyone is granted a worldwide, perpetual, royalty-free,
# non-exclusive license to exercise all rights associated with the
# contents of this file for any purpose whatsoever.
# No rights are reserved.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# ===================================================================

from Crypto.Util.asn1 import (DerSequence, DerInteger, DerBitString,
                             DerObjectId, DerNull)

def _expand_subject_public_key_info(encoded):
    """Parse a SubjectPublicKeyInfo structure.

It returns a triple with:
        * OID (string)
        * encoded public key (bytes)
        * Algorithm parameters (bytes or None)
    """

#
    # SubjectPublicKeyInfo  ::=  SEQUENCE  {
    #   algorithm         AlgorithmIdentifier,
    #   subjectPublicKey  BIT STRING
    # }
    #
    # AlgorithmIdentifier  ::=  SEQUENCE  {
    #   algorithm   OBJECT IDENTIFIER,
    #   parameters  ANY DEFINED BY algorithm OPTIONAL
    # }
    #

spki = DerSequence().decode(encoded, nr_elements=2)
    algo = DerSequence().decode(spki[0], nr_elements=(1,2))
    algo_oid = DerObjectId().decode(algo[0])
    spk = DerBitString().decode(spki[1]).value

if len(algo) == 1:
        algo_params = None
    else:
        try:
            DerNull().decode(algo[1])
            algo_params = None
        except:
            algo_params = algo[1]

return algo_oid.value, spk, algo_params

def _create_subject_public_key_info(algo_oid, public_key, params):

if params is None:
        algorithm = DerSequence([DerObjectId(algo_oid)])
    else:
        algorithm = DerSequence([DerObjectId(algo_oid), params])

spki = DerSequence([algorithm,
                        DerBitString(public_key)
                        ])
    return spki.encode()

def _extract_subject_public_key_info(x509_certificate):
    """Extract subjectPublicKeyInfo from a DER X.509 certificate."""

certificate = DerSequence().decode(x509_certificate, nr_elements=3)
    tbs_certificate = DerSequence().decode(certificate[0],
                                           nr_elements=range(6, 11))

index = 5
    try:
        tbs_certificate[0] + 1
        # Version not present
        version = 1
    except TypeError:
        version = DerInteger(explicit=0).decode(tbs_certificate[0]).value
        if version not in (2, 3):
            raise ValueError("Incorrect X.509 certificate version")
        index = 6

return tbs_certificate[index]

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