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| 1 # Authors: | 1 # Authors: |
| 2 # Trevor Perrin | 2 # Trevor Perrin |
| 3 # Dave Baggett (Arcode Corporation) - MD5 support for MAC_SSL | 3 # Dave Baggett (Arcode Corporation) - MD5 support for MAC_SSL |
| 4 # Yngve Pettersen (ported by Paul Sokolovsky) - TLS 1.2 | 4 # Yngve Pettersen (ported by Paul Sokolovsky) - TLS 1.2 |
| 5 # | 5 # |
| 6 # See the LICENSE file for legal information regarding use of this file. | 6 # See the LICENSE file for legal information regarding use of this file. |
| 7 | 7 |
| 8 """Miscellaneous helper functions.""" | 8 """Miscellaneous helper functions.""" |
| 9 | 9 |
| 10 from .utils.compat import * | 10 from .utils.compat import * |
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| 60 A = bytearray([ord('A')+x] * (x+1)) # 'A', 'BB', 'CCC', etc.. | 60 A = bytearray([ord('A')+x] * (x+1)) # 'A', 'BB', 'CCC', etc.. |
| 61 input = secret + SHA1(A + secret + seed) | 61 input = secret + SHA1(A + secret + seed) |
| 62 output = MD5(input) | 62 output = MD5(input) |
| 63 for c in output: | 63 for c in output: |
| 64 if index >= length: | 64 if index >= length: |
| 65 return bytes | 65 return bytes |
| 66 bytes[index] = c | 66 bytes[index] = c |
| 67 index += 1 | 67 index += 1 |
| 68 return bytes | 68 return bytes |
| 69 | 69 |
| 70 def calcMasterSecret(version, premasterSecret, clientRandom, serverRandom): | 70 def calcMasterSecret(version, premasterSecret, clientRandom, serverRandom, |
| 71 handshakeHash, useExtendedMasterSecret): |
| 72 label = b"master secret" |
| 73 seed = clientRandom + serverRandom |
| 74 if useExtendedMasterSecret: |
| 75 label = b"extended master secret" |
| 76 seed = handshakeHash |
| 77 |
| 71 if version == (3,0): | 78 if version == (3,0): |
| 72 masterSecret = PRF_SSL(premasterSecret, | 79 masterSecret = PRF_SSL(premasterSecret, seed, 48) |
| 73 clientRandom + serverRandom, 48) | |
| 74 elif version in ((3,1), (3,2)): | 80 elif version in ((3,1), (3,2)): |
| 75 masterSecret = PRF(premasterSecret, b"master secret", | 81 masterSecret = PRF(premasterSecret, label, seed, 48) |
| 76 clientRandom + serverRandom, 48) | |
| 77 elif version == (3,3): | 82 elif version == (3,3): |
| 78 masterSecret = PRF_1_2(premasterSecret, b"master secret", | 83 masterSecret = PRF_1_2(premasterSecret, label, seed, 48) |
| 79 clientRandom + serverRandom, 48) | |
| 80 else: | 84 else: |
| 81 raise AssertionError() | 85 raise AssertionError() |
| 82 return masterSecret | 86 return masterSecret |
| 83 | 87 |
| 84 | 88 |
| 85 def makeX(salt, username, password): | 89 def makeX(salt, username, password): |
| 86 if len(username)>=256: | 90 if len(username)>=256: |
| 87 raise ValueError("username too long") | 91 raise ValueError("username too long") |
| 88 if len(salt)>=256: | 92 if len(salt)>=256: |
| 89 raise ValueError("salt too long") | 93 raise ValueError("salt too long") |
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| 142 new.ihash = self.ihash.copy() | 146 new.ihash = self.ihash.copy() |
| 143 new.ohash = self.ohash.copy() | 147 new.ohash = self.ohash.copy() |
| 144 new.digestmod = self.digestmod | 148 new.digestmod = self.digestmod |
| 145 new.digest_size = self.digest_size | 149 new.digest_size = self.digest_size |
| 146 return new | 150 return new |
| 147 | 151 |
| 148 def digest(self): | 152 def digest(self): |
| 149 ohash2 = self.ohash.copy() | 153 ohash2 = self.ohash.copy() |
| 150 ohash2.update(self.ihash.digest()) | 154 ohash2.update(self.ihash.digest()) |
| 151 return bytearray(ohash2.digest()) | 155 return bytearray(ohash2.digest()) |
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Chromium Code Reviews
Issue 1283373002:
Implement extended master secret in tlslite (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master