/usr/share/pyshared/gdata/tlslite/utils/keyfactory.py is in python-gdata 2.0.14-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 | """Factory functions for asymmetric cryptography.
@sort: generateRSAKey, parseXMLKey, parsePEMKey, parseAsPublicKey,
parseAsPrivateKey
"""
from compat import *
from RSAKey import RSAKey
from Python_RSAKey import Python_RSAKey
import cryptomath
if cryptomath.m2cryptoLoaded:
from OpenSSL_RSAKey import OpenSSL_RSAKey
if cryptomath.pycryptoLoaded:
from PyCrypto_RSAKey import PyCrypto_RSAKey
# **************************************************************************
# Factory Functions for RSA Keys
# **************************************************************************
def generateRSAKey(bits, implementations=["openssl", "python"]):
"""Generate an RSA key with the specified bit length.
@type bits: int
@param bits: Desired bit length of the new key's modulus.
@rtype: L{tlslite.utils.RSAKey.RSAKey}
@return: A new RSA private key.
"""
for implementation in implementations:
if implementation == "openssl" and cryptomath.m2cryptoLoaded:
return OpenSSL_RSAKey.generate(bits)
elif implementation == "python":
return Python_RSAKey.generate(bits)
raise ValueError("No acceptable implementations")
def parseXMLKey(s, private=False, public=False, implementations=["python"]):
"""Parse an XML-format key.
The XML format used here is specific to tlslite and cryptoIDlib. The
format can store the public component of a key, or the public and
private components. For example::
<publicKey xmlns="http://trevp.net/rsa">
<n>4a5yzB8oGNlHo866CAspAC47M4Fvx58zwK8pou...
<e>Aw==</e>
</publicKey>
<privateKey xmlns="http://trevp.net/rsa">
<n>4a5yzB8oGNlHo866CAspAC47M4Fvx58zwK8pou...
<e>Aw==</e>
<d>JZ0TIgUxWXmL8KJ0VqyG1V0J3ern9pqIoB0xmy...
<p>5PreIj6z6ldIGL1V4+1C36dQFHNCQHJvW52GXc...
<q>/E/wDit8YXPCxx126zTq2ilQ3IcW54NJYyNjiZ...
<dP>mKc+wX8inDowEH45Qp4slRo1YveBgExKPROu6...
<dQ>qDVKtBz9lk0shL5PR3ickXDgkwS576zbl2ztB...
<qInv>j6E8EA7dNsTImaXexAmLA1DoeArsYeFAInr...
</privateKey>
@type s: str
@param s: A string containing an XML public or private key.
@type private: bool
@param private: If True, a L{SyntaxError} will be raised if the private
key component is not present.
@type public: bool
@param public: If True, the private key component (if present) will be
discarded, so this function will always return a public key.
@rtype: L{tlslite.utils.RSAKey.RSAKey}
@return: An RSA key.
@raise SyntaxError: If the key is not properly formatted.
"""
for implementation in implementations:
if implementation == "python":
key = Python_RSAKey.parseXML(s)
break
else:
raise ValueError("No acceptable implementations")
return _parseKeyHelper(key, private, public)
#Parse as an OpenSSL or Python key
def parsePEMKey(s, private=False, public=False, passwordCallback=None,
implementations=["openssl", "python"]):
"""Parse a PEM-format key.
The PEM format is used by OpenSSL and other tools. The
format is typically used to store both the public and private
components of a key. For example::
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
To generate a key like this with OpenSSL, run::
openssl genrsa 2048 > key.pem
This format also supports password-encrypted private keys. TLS
Lite can only handle password-encrypted private keys when OpenSSL
and M2Crypto are installed. In this case, passwordCallback will be
invoked to query the user for the password.
@type s: str
@param s: A string containing a PEM-encoded public or private key.
@type private: bool
@param private: If True, a L{SyntaxError} will be raised if the
private key component is not present.
@type public: bool
@param public: If True, the private key component (if present) will
be discarded, so this function will always return a public key.
@type passwordCallback: callable
@param passwordCallback: This function will be called, with no
arguments, if the PEM-encoded private key is password-encrypted.
The callback should return the password string. If the password is
incorrect, SyntaxError will be raised. If no callback is passed
and the key is password-encrypted, a prompt will be displayed at
the console.
@rtype: L{tlslite.utils.RSAKey.RSAKey}
@return: An RSA key.
@raise SyntaxError: If the key is not properly formatted.
"""
for implementation in implementations:
if implementation == "openssl" and cryptomath.m2cryptoLoaded:
key = OpenSSL_RSAKey.parse(s, passwordCallback)
break
elif implementation == "python":
key = Python_RSAKey.parsePEM(s)
break
else:
raise ValueError("No acceptable implementations")
return _parseKeyHelper(key, private, public)
def _parseKeyHelper(key, private, public):
if private:
if not key.hasPrivateKey():
raise SyntaxError("Not a private key!")
if public:
return _createPublicKey(key)
if private:
if hasattr(key, "d"):
return _createPrivateKey(key)
else:
return key
return key
def parseAsPublicKey(s):
"""Parse an XML or PEM-formatted public key.
@type s: str
@param s: A string containing an XML or PEM-encoded public or private key.
@rtype: L{tlslite.utils.RSAKey.RSAKey}
@return: An RSA public key.
@raise SyntaxError: If the key is not properly formatted.
"""
try:
return parsePEMKey(s, public=True)
except:
return parseXMLKey(s, public=True)
def parsePrivateKey(s):
"""Parse an XML or PEM-formatted private key.
@type s: str
@param s: A string containing an XML or PEM-encoded private key.
@rtype: L{tlslite.utils.RSAKey.RSAKey}
@return: An RSA private key.
@raise SyntaxError: If the key is not properly formatted.
"""
try:
return parsePEMKey(s, private=True)
except:
return parseXMLKey(s, private=True)
def _createPublicKey(key):
"""
Create a new public key. Discard any private component,
and return the most efficient key possible.
"""
if not isinstance(key, RSAKey):
raise AssertionError()
return _createPublicRSAKey(key.n, key.e)
def _createPrivateKey(key):
"""
Create a new private key. Return the most efficient key possible.
"""
if not isinstance(key, RSAKey):
raise AssertionError()
if not key.hasPrivateKey():
raise AssertionError()
return _createPrivateRSAKey(key.n, key.e, key.d, key.p, key.q, key.dP,
key.dQ, key.qInv)
def _createPublicRSAKey(n, e, implementations = ["openssl", "pycrypto",
"python"]):
for implementation in implementations:
if implementation == "openssl" and cryptomath.m2cryptoLoaded:
return OpenSSL_RSAKey(n, e)
elif implementation == "pycrypto" and cryptomath.pycryptoLoaded:
return PyCrypto_RSAKey(n, e)
elif implementation == "python":
return Python_RSAKey(n, e)
raise ValueError("No acceptable implementations")
def _createPrivateRSAKey(n, e, d, p, q, dP, dQ, qInv,
implementations = ["pycrypto", "python"]):
for implementation in implementations:
if implementation == "pycrypto" and cryptomath.pycryptoLoaded:
return PyCrypto_RSAKey(n, e, d, p, q, dP, dQ, qInv)
elif implementation == "python":
return Python_RSAKey(n, e, d, p, q, dP, dQ, qInv)
raise ValueError("No acceptable implementations")
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