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wolfssl
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Code Issues Releases Wiki Activity

respond to negotiation attempt with alert warning no_renegotiation to try graceful continue if possible

pull/1/head
toddouska 2012-02-01 17:18:40 -08:00
parent e98715ee11
commit 9b5ab7c914
2 changed files with 38 additions and 1 deletions
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4
cyassl/internal.h
View File

@ -1160,7 +1160,9 @@ enum AlertDescription {
certificate_expired = 45,
certificate_unknown = 46,
illegal_parameter = 47,
decrypt_error = 51
decrypt_error = 51,
protocol_version = 70,
no_renegotiation = 100
};

35
src/internal.c
View File

@ -1709,6 +1709,36 @@ static int DoCertificate(CYASSL* ssl, byte* input, word32* inOutIdx)
}
static int DoHelloRequest(CYASSL* ssl, const byte* input, word32* inOutIdx)
{
if (ssl->keys.encryptionOn) {
const byte* mac;
int padSz = ssl->keys.encryptSz - HANDSHAKE_HEADER_SZ -
ssl->specs.hash_size;
byte verify[SHA256_DIGEST_SIZE];
ssl->hmac(ssl, verify, input + *inOutIdx - HANDSHAKE_HEADER_SZ,
HANDSHAKE_HEADER_SZ, handshake, 1);
/* read mac and fill */
mac = input + *inOutIdx;
*inOutIdx += ssl->specs.hash_size;
if (ssl->options.tls1_1 && ssl->specs.cipher_type == block)
padSz -= ssl->specs.block_size;
*inOutIdx += padSz;
/* verify */
if (XMEMCMP(mac, verify, ssl->specs.hash_size)) {
CYASSL_MSG(" hello_request verify mac error");
return VERIFY_MAC_ERROR;
}
}
return SendAlert(ssl, alert_warning, no_renegotiation);
}
int DoFinished(CYASSL* ssl, const byte* input, word32* inOutIdx, int sniff)
{
byte verifyMAC[SHA256_DIGEST_SIZE];
@ -1802,6 +1832,11 @@ static int DoHandShakeMsg(CYASSL* ssl, byte* input, word32* inOutIdx,
switch (type) {
case hello_request:
CYASSL_MSG("processing hello request");
ret = DoHelloRequest(ssl, input, inOutIdx);
break;
#ifndef NO_CYASSL_CLIENT
case hello_verify_request:
CYASSL_MSG("processing hello verify request");