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dev-python/rsa: delete unnecessary package
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Dongsu Park
parent
6f44bbc88a
commit
7e019a57c3
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DIST rsa-3.2.3.tar.gz 35628 SHA256 14db288cc40d6339dedf60d7a47053ab004b4a8976a5c59402a211d8fc5bf21f SHA512 52b33e0278e6e1fed64b1cdebed29f7caa31fae733c2d5875e6cba5a045aaa829616799d8de84fdb63c546780dbdafcabf1f85f25930b8e663861151479ef7e2 WHIRLPOOL 5814f912849bed4f98f8bef20dcf2fb9b28af70b970f324cadab90f0c67ff42c32792f7a6306edf1884d4cf6fe35d27f47c833358c2d03c582faba60fba1490d
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DIST rsa-3.4.2.tar.gz 40956 SHA256 25df4e10c263fb88b5ace923dd84bf9aa7f5019687b5e55382ffcdb8bede9db5 SHA512 62b0ff31fb3b9c18ae65bd102329e69726b853560576b1b66b9b89b26d3ff79154239af7e7a581b6a27c7017cc013f738762cd9662777ef594cc11c5b1f8e267 WHIRLPOOL d8d51f7ffc47af5fbc48199860171c38fe6f08b5a510bfed20513c22df8a614565703c9d89939ff1092a7c6392fbdef8bacf41cc839a9943b120b1fa4cf8d496
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# HG changeset patch
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# User Filippo Valsorda <hi@filippo.io>
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# Date 1450226563 0
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# Node ID 0cbcc529926afd61c6df4f50cfc29971beafd2c2
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# Parent 2baab06c8b867b01ec82b02118d4872a931a0437
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Fix BB'06 attack in verify() by switching from parsing to comparison
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diff --git a/rsa/pkcs1.py b/rsa/pkcs1.py
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--- a/rsa/pkcs1.py
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+++ b/rsa/pkcs1.py
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@@ -22,10 +22,10 @@
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At least 8 bytes of random padding is used when encrypting a message. This makes
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these methods much more secure than the ones in the ``rsa`` module.
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-WARNING: this module leaks information when decryption or verification fails.
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-The exceptions that are raised contain the Python traceback information, which
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-can be used to deduce where in the process the failure occurred. DO NOT PASS
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-SUCH INFORMATION to your users.
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+WARNING: this module leaks information when decryption fails. The exceptions
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+that are raised contain the Python traceback information, which can be used to
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+deduce where in the process the failure occurred. DO NOT PASS SUCH INFORMATION
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+to your users.
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'''
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import hashlib
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@@ -288,37 +288,23 @@
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:param pub_key: the :py:class:`rsa.PublicKey` of the person signing the message.
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:raise VerificationError: when the signature doesn't match the message.
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- .. warning::
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-
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- Never display the stack trace of a
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- :py:class:`rsa.pkcs1.VerificationError` exception. It shows where in
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- the code the exception occurred, and thus leaks information about the
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- key. It's only a tiny bit of information, but every bit makes cracking
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- the keys easier.
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-
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'''
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- blocksize = common.byte_size(pub_key.n)
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+ keylength = common.byte_size(pub_key.n)
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encrypted = transform.bytes2int(signature)
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decrypted = core.decrypt_int(encrypted, pub_key.e, pub_key.n)
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- clearsig = transform.int2bytes(decrypted, blocksize)
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-
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- # If we can't find the signature marker, verification failed.
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- if clearsig[0:2] != b('\x00\x01'):
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- raise VerificationError('Verification failed')
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+ clearsig = transform.int2bytes(decrypted, keylength)
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- # Find the 00 separator between the padding and the payload
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- try:
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- sep_idx = clearsig.index(b('\x00'), 2)
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- except ValueError:
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- raise VerificationError('Verification failed')
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-
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- # Get the hash and the hash method
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- (method_name, signature_hash) = _find_method_hash(clearsig[sep_idx+1:])
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+ # Get the hash method
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+ method_name = _find_method_hash(clearsig)
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message_hash = _hash(message, method_name)
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- # Compare the real hash to the hash in the signature
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- if message_hash != signature_hash:
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+ # Reconstruct the expected padded hash
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+ cleartext = HASH_ASN1[method_name] + message_hash
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+ expected = _pad_for_signing(cleartext, keylength)
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+
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+ # Compare with the signed one
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+ if expected != clearsig:
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raise VerificationError('Verification failed')
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return True
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@@ -351,24 +337,20 @@
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return hasher.digest()
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-def _find_method_hash(method_hash):
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- '''Finds the hash method and the hash itself.
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+def _find_method_hash(clearsig):
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+ '''Finds the hash method.
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- :param method_hash: ASN1 code for the hash method concatenated with the
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- hash itself.
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+ :param clearsig: full padded ASN1 and hash.
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- :return: tuple (method, hash) where ``method`` is the used hash method, and
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- ``hash`` is the hash itself.
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+ :return: the used hash method.
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:raise VerificationFailed: when the hash method cannot be found
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'''
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for (hashname, asn1code) in HASH_ASN1.items():
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- if not method_hash.startswith(asn1code):
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- continue
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-
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- return (hashname, method_hash[len(asn1code):])
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+ if asn1code in clearsig:
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+ return hashname
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raise VerificationError('Verification failed')
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@ -1,11 +0,0 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
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<pkgmetadata>
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<maintainer type="project">
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<email>python@gentoo.org</email>
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<name>Python</name>
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</maintainer>
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<upstream>
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<remote-id type="pypi">rsa</remote-id>
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</upstream>
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</pkgmetadata>
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# Copyright 1999-2017 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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EAPI=5
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PYTHON_COMPAT=( python2_7 python3_{4,5,6} pypy )
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inherit distutils-r1
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DESCRIPTION="Pure-Python RSA implementation"
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HOMEPAGE="http://stuvel.eu/rsa https://pypi.python.org/pypi/rsa"
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SRC_URI="mirror://pypi/${P:0:1}/${PN}/${P}.tar.gz"
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LICENSE="Apache-2.0"
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SLOT="0"
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KEYWORDS="amd64 arm x86"
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IUSE="test"
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RDEPEND="
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>=dev-python/pyasn1-0.1.3[${PYTHON_USEDEP}]
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dev-python/traceback2[${PYTHON_USEDEP}]
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"
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DEPEND="${RDEPEND}
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>=dev-python/setuptools-0.6.10[${PYTHON_USEDEP}]
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test? (
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dev-python/nose[${PYTHON_USEDEP}]
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dev-python/unittest2[${PYTHON_USEDEP}]
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)
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"
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PATCHES=(
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"${FILESDIR}"/${P}-CVE-2016-1494.patch
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)
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python_test() {
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nosetests --verbose || die
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}
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@ -1,33 +0,0 @@
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# Copyright 1999-2017 Gentoo Foundation
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# Distributed under the terms of the GNU General Public License v2
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EAPI=5
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PYTHON_COMPAT=( python2_7 python3_{4,5,6} pypy )
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inherit distutils-r1
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DESCRIPTION="Pure-Python RSA implementation"
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HOMEPAGE="http://stuvel.eu/rsa https://pypi.python.org/pypi/rsa"
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SRC_URI="mirror://pypi/${P:0:1}/${PN}/${P}.tar.gz"
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LICENSE="Apache-2.0"
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SLOT="0"
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KEYWORDS="~amd64 ~arm ~arm64 ~x86"
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IUSE="test"
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RDEPEND="
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>=dev-python/pyasn1-0.1.3[${PYTHON_USEDEP}]
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dev-python/traceback2[${PYTHON_USEDEP}]
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"
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DEPEND="${RDEPEND}
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>=dev-python/setuptools-0.6.10[${PYTHON_USEDEP}]
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test? (
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dev-python/nose[${PYTHON_USEDEP}]
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dev-python/unittest2[${PYTHON_USEDEP}]
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)
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"
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python_test() {
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nosetests --verbose || die
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}
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