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Code Issues Releases Activity

proper handshake messages hash calculations

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orignal 2015-02-19 22:13:41 -05:00
parent 64a4799c8c
commit d1b26b72e3
1 changed files with 11 additions and 12 deletions
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23
Reseed.cpp
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@ -563,14 +563,14 @@ namespace data
CryptoPP::SHA256 finishedHash;
// send ClientHello
site.write ((char *)clientHello, sizeof (clientHello));
finishedHash.Update (clientHello, sizeof (clientHello));
finishedHash.Update (clientHello + 5, sizeof (clientHello) - 5);
// read ServerHello
uint8_t type;
site.read ((char *)&type, 1); finishedHash.Update ((uint8_t *)&type, 1);
site.read ((char *)&type, 1);
uint16_t version;
site.read ((char *)&version, 2); finishedHash.Update ((uint8_t *)&version, 2);
site.read ((char *)&version, 2);
uint16_t length;
site.read ((char *)&length, 2); finishedHash.Update ((uint8_t *)&length, 2);
site.read ((char *)&length, 2);
length = be16toh (length);
char * serverHello = new char[length];
site.read (serverHello, length);
@ -582,9 +582,9 @@ namespace data
LogPrint (eLogError, "Unexpected handshake type ", (int)serverHello[0]);
delete[] serverHello;
// read Certificate
site.read ((char *)&type, 1); finishedHash.Update ((uint8_t *)&type, 1);
site.read ((char *)&version, 2); finishedHash.Update ((uint8_t *)&version, 2);
site.read ((char *)&length, 2); finishedHash.Update ((uint8_t *)&length, 2);
site.read ((char *)&type, 1);
site.read ((char *)&version, 2);
site.read ((char *)&length, 2);
length = be16toh (length);
char * certificate = new char[length];
site.read (certificate, length);
@ -600,9 +600,9 @@ namespace data
LogPrint (eLogError, "Unexpected handshake type ", (int)certificate[0]);
delete[] certificate;
// read ServerHelloDone
site.read ((char *)&type, 1); finishedHash.Update ((uint8_t *)&type, 1);
site.read ((char *)&version, 2); finishedHash.Update ((uint8_t *)&version, 2);
site.read ((char *)&length, 2); finishedHash.Update ((uint8_t *)&length, 2);
site.read ((char *)&type, 1);
site.read ((char *)&version, 2);
site.read ((char *)&length, 2);
length = be16toh (length);
char * serverHelloDone = new char[length];
site.read (serverHelloDone, length);
@ -622,14 +622,13 @@ namespace data
// send ClientKeyExchange
site.write ((char *)clientKeyExchange, sizeof (clientKeyExchange));
site.write ((char *)encrypted, 256);
finishedHash.Update (clientKeyExchange, sizeof (clientKeyExchange));
finishedHash.Update (clientKeyExchange + 5, sizeof (clientKeyExchange) - 5);
finishedHash.Update (encrypted, 256);
uint8_t masterSecret[48], random[64];
memcpy (random, clientHello + 11, 32);
memcpy (random + 32, serverRandom, 32);
// send ChangeCipherSpecs
site.write ((char *)changeCipherSpecs, sizeof (changeCipherSpecs));
finishedHash.Update (changeCipherSpecs, sizeof (changeCipherSpecs));
// calculate master secret
PRF (secret, "master secret", random, 64, 48, masterSecret);
// expand master secret