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| 1 """ | |
| 2 A helper class for using TLS Lite with stdlib clients | |
| 3 (httplib, xmlrpclib, imaplib, poplib). | |
| 4 """ | |
| 5 | |
| 6 from tlslite.Checker import Checker | |
| 7 | |
| 8 class ClientHelper: | |
| 9 """This is a helper class used to integrate TLS Lite with various | |
| 10 TLS clients (e.g. poplib, smtplib, httplib, etc.)""" | |
| 11 | |
| 12 def __init__(self, | |
| 13 username=None, password=None, sharedKey=None, | |
| 14 certChain=None, privateKey=None, | |
| 15 cryptoID=None, protocol=None, | |
| 16 x509Fingerprint=None, | |
| 17 x509TrustList=None, x509CommonName=None, | |
| 18 settings = None): | |
| 19 """ | |
| 20 For client authentication, use one of these argument | |
| 21 combinations: | |
| 22 - username, password (SRP) | |
| 23 - username, sharedKey (shared-key) | |
| 24 - certChain, privateKey (certificate) | |
| 25 | |
| 26 For server authentication, you can either rely on the | |
| 27 implicit mutual authentication performed by SRP or | |
| 28 shared-keys, or you can do certificate-based server | |
| 29 authentication with one of these argument combinations: | |
| 30 - cryptoID[, protocol] (requires cryptoIDlib) | |
| 31 - x509Fingerprint | |
| 32 - x509TrustList[, x509CommonName] (requires cryptlib_py) | |
| 33 | |
| 34 Certificate-based server authentication is compatible with | |
| 35 SRP or certificate-based client authentication. It is | |
| 36 not compatible with shared-keys. | |
| 37 | |
| 38 The constructor does not perform the TLS handshake itself, but | |
| 39 simply stores these arguments for later. The handshake is | |
| 40 performed only when this class needs to connect with the | |
| 41 server. Then you should be prepared to handle TLS-specific | |
| 42 exceptions. See the client handshake functions in | |
| 43 L{tlslite.TLSConnection.TLSConnection} for details on which | |
| 44 exceptions might be raised. | |
| 45 | |
| 46 @type username: str | |
| 47 @param username: SRP or shared-key username. Requires the | |
| 48 'password' or 'sharedKey' argument. | |
| 49 | |
| 50 @type password: str | |
| 51 @param password: SRP password for mutual authentication. | |
| 52 Requires the 'username' argument. | |
| 53 | |
| 54 @type sharedKey: str | |
| 55 @param sharedKey: Shared key for mutual authentication. | |
| 56 Requires the 'username' argument. | |
| 57 | |
| 58 @type certChain: L{tlslite.X509CertChain.X509CertChain} or | |
| 59 L{cryptoIDlib.CertChain.CertChain} | |
| 60 @param certChain: Certificate chain for client authentication. | |
| 61 Requires the 'privateKey' argument. Excludes the SRP or | |
| 62 shared-key related arguments. | |
| 63 | |
| 64 @type privateKey: L{tlslite.utils.RSAKey.RSAKey} | |
| 65 @param privateKey: Private key for client authentication. | |
| 66 Requires the 'certChain' argument. Excludes the SRP or | |
| 67 shared-key related arguments. | |
| 68 | |
| 69 @type cryptoID: str | |
| 70 @param cryptoID: cryptoID for server authentication. Mutually | |
| 71 exclusive with the 'x509...' arguments. | |
| 72 | |
| 73 @type protocol: str | |
| 74 @param protocol: cryptoID protocol URI for server | |
| 75 authentication. Requires the 'cryptoID' argument. | |
| 76 | |
| 77 @type x509Fingerprint: str | |
| 78 @param x509Fingerprint: Hex-encoded X.509 fingerprint for | |
| 79 server authentication. Mutually exclusive with the 'cryptoID' | |
| 80 and 'x509TrustList' arguments. | |
| 81 | |
| 82 @type x509TrustList: list of L{tlslite.X509.X509} | |
| 83 @param x509TrustList: A list of trusted root certificates. The | |
| 84 other party must present a certificate chain which extends to | |
| 85 one of these root certificates. The cryptlib_py module must be | |
| 86 installed to use this parameter. Mutually exclusive with the | |
| 87 'cryptoID' and 'x509Fingerprint' arguments. | |
| 88 | |
| 89 @type x509CommonName: str | |
| 90 @param x509CommonName: The end-entity certificate's 'CN' field | |
| 91 must match this value. For a web server, this is typically a | |
| 92 server name such as 'www.amazon.com'. Mutually exclusive with | |
| 93 the 'cryptoID' and 'x509Fingerprint' arguments. Requires the | |
| 94 'x509TrustList' argument. | |
| 95 | |
| 96 @type settings: L{tlslite.HandshakeSettings.HandshakeSettings} | |
| 97 @param settings: Various settings which can be used to control | |
| 98 the ciphersuites, certificate types, and SSL/TLS versions | |
| 99 offered by the client. | |
| 100 """ | |
| 101 | |
| 102 self.username = None | |
| 103 self.password = None | |
| 104 self.sharedKey = None | |
| 105 self.certChain = None | |
| 106 self.privateKey = None | |
| 107 self.checker = None | |
| 108 | |
| 109 #SRP Authentication | |
| 110 if username and password and not \ | |
| 111 (sharedKey or certChain or privateKey): | |
| 112 self.username = username | |
| 113 self.password = password | |
| 114 | |
| 115 #Shared Key Authentication | |
| 116 elif username and sharedKey and not \ | |
| 117 (password or certChain or privateKey): | |
| 118 self.username = username | |
| 119 self.sharedKey = sharedKey | |
| 120 | |
| 121 #Certificate Chain Authentication | |
| 122 elif certChain and privateKey and not \ | |
| 123 (username or password or sharedKey): | |
| 124 self.certChain = certChain | |
| 125 self.privateKey = privateKey | |
| 126 | |
| 127 #No Authentication | |
| 128 elif not password and not username and not \ | |
| 129 sharedKey and not certChain and not privateKey: | |
| 130 pass | |
| 131 | |
| 132 else: | |
| 133 raise ValueError("Bad parameters") | |
| 134 | |
| 135 #Authenticate the server based on its cryptoID or fingerprint | |
| 136 if sharedKey and (cryptoID or protocol or x509Fingerprint): | |
| 137 raise ValueError("Can't use shared keys with other forms of"\ | |
| 138 "authentication") | |
| 139 | |
| 140 self.checker = Checker(cryptoID, protocol, x509Fingerprint, | |
| 141 x509TrustList, x509CommonName) | |
| 142 self.settings = settings | |
| 143 | |
| 144 self.tlsSession = None | |
| 145 | |
| 146 def _handshake(self, tlsConnection): | |
| 147 if self.username and self.password: | |
| 148 tlsConnection.handshakeClientSRP(username=self.username, | |
| 149 password=self.password, | |
| 150 checker=self.checker, | |
| 151 settings=self.settings, | |
| 152 session=self.tlsSession) | |
| 153 elif self.username and self.sharedKey: | |
| 154 tlsConnection.handshakeClientSharedKey(username=self.username, | |
| 155 sharedKey=self.sharedKey, | |
| 156 settings=self.settings) | |
| 157 else: | |
| 158 tlsConnection.handshakeClientCert(certChain=self.certChain, | |
| 159 privateKey=self.privateKey, | |
| 160 checker=self.checker, | |
| 161 settings=self.settings, | |
| 162 session=self.tlsSession) | |
| 163 self.tlsSession = tlsConnection.session | |
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Chromium Code Reviews
Issue 211173006:
Perform tlslite 0.3.8 -> 0.4.6 renames ahead of time. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src