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1. Moved the CopySessionInfo function to a better location for the additions.
2. Added accessors for a callback and application context data.
3. Added a callback that is called from ProcessClientKeyExchange when everything is known about the start of the current session.
4. Added the private key size and the server name indication to the SSLInfo record.
This commit is contained in:
John Safranek
2019-05-16 14:07:44 -07:00
parent 1781a9fd76
commit 245db5d5ce
2 changed files with 86 additions and 41 deletions
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119
src/sniffer.c
View File

@@ -406,6 +406,10 @@ static int RecoveryEnabled = 0; /* global switch */
static int MaxRecoveryMemory = -1; /* per session max recovery memory */
static word32 MissedDataSessions = 0; /* # of sessions with missed data */
/* Connection Info Callback */
static SSLConnCb ConnectionCb;
static void* ConnectionCbCtx = NULL;
static void UpdateMissedDataSessions(void)
{
@@ -1490,6 +1494,58 @@ static int GetRecordHeader(const byte* input, RecordLayerHeader* rh, int* size)
}
/* Copies the session's infomation to the provided sslInfo. Skip copy if
* SSLInfo is not provided. */
static void CopySessionInfo(SnifferSession* session, SSLInfo* sslInfo)
{
if (NULL != sslInfo) {
XMEMSET(sslInfo, 0, sizeof(SSLInfo));
/* Pass back Session Info after we have processed the Server Hello. */
if (0 != session->sslServer->options.cipherSuite) {
const char* pCipher;
sslInfo->isValid = 1;
sslInfo->protocolVersionMajor = session->sslServer->version.major;
sslInfo->protocolVersionMinor = session->sslServer->version.minor;
sslInfo->serverCipherSuite0 =
session->sslServer->options.cipherSuite0;
sslInfo->serverCipherSuite =
session->sslServer->options.cipherSuite;
pCipher = wolfSSL_get_cipher(session->sslServer);
if (NULL != pCipher) {
XSTRNCPY((char*)sslInfo->serverCipherSuiteName, pCipher,
sizeof(sslInfo->serverCipherSuiteName));
sslInfo->serverCipherSuiteName
[sizeof(sslInfo->serverCipherSuiteName) - 1] = '\0';
}
sslInfo->keySize = session->keySz;
#ifdef HAVE_SNI
if (NULL != session->sni) {
XSTRNCPY((char*)sslInfo->serverNameIndication,
session->sni, sizeof(sslInfo->serverNameIndication));
sslInfo->serverNameIndication
[sizeof(sslInfo->serverNameIndication) - 1] = '\0';
}
#endif
TraceSessionInfo(sslInfo);
}
}
}
/* Call the session connection start callback. */
static void CallConnectionCb(SnifferSession* session)
{
if (ConnectionCb != NULL) {
SSLInfo info;
CopySessionInfo(session, &info);
ConnectionCb((const void*)session, &info, ConnectionCbCtx);
}
}
/* Process Client Key Exchange, RSA or static ECDH */
static int ProcessClientKeyExchange(const byte* input, int* sslBytes,
SnifferSession* session, char* error)
@@ -1698,6 +1754,8 @@ static int ProcessClientKeyExchange(const byte* input, int* sslBytes,
}
#endif
CallConnectionCb(session);
return ret;
}
@@ -2521,6 +2579,10 @@ static SnifferSession* CreateSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
session->cliSeqStart = tcpInfo->sequence;
session->cliExpected = 1; /* relative */
session->lastUsed= time(NULL);
session->keySz = 0;
#ifdef HAVE_SNI
session->sni = NULL;
#endif
session->context = GetSnifferServer(ipInfo, tcpInfo);
if (session->context == NULL) {
@@ -3600,47 +3662,6 @@ static int RemoveFatalSession(IpInfo* ipInfo, TcpInfo* tcpInfo,
}
/* Copies the session's infomation to the provided sslInfo. Skip copy if
* SSLInfo is not provided. */
static void CopySessionInfo(SnifferSession* session, SSLInfo* sslInfo)
{
if (NULL != sslInfo) {
XMEMSET(sslInfo, 0, sizeof(SSLInfo));
/* Pass back Session Info after we have processed the Server Hello. */
if (0 != session->sslServer->options.cipherSuite) {
const char* pCipher;
sslInfo->isValid = 1;
sslInfo->protocolVersionMajor = session->sslServer->version.major;
sslInfo->protocolVersionMinor = session->sslServer->version.minor;
sslInfo->serverCipherSuite0 =
session->sslServer->options.cipherSuite0;
sslInfo->serverCipherSuite =
session->sslServer->options.cipherSuite;
pCipher = wolfSSL_get_cipher(session->sslServer);
if (NULL != pCipher) {
XSTRNCPY((char*)sslInfo->serverCipherSuiteName, pCipher,
sizeof(sslInfo->serverCipherSuiteName));
sslInfo->serverCipherSuiteName
[sizeof(sslInfo->serverCipherSuiteName) - 1] = '\0';
}
sslInfo->keySize = session->keySz;
#ifdef HAVE_SNI
if (NULL != session->sni) {
XSTRNCPY((char*)sslInfo->serverNameIndication,
session->sni, sizeof(sslInfo->serverNameIndication));
sslInfo->serverNameIndication
[sizeof(sslInfo->serverNameIndication) - 1] = '\0';
}
#endif
TraceSessionInfo(sslInfo);
}
}
}
/* Passes in an IP/TCP packet for decoding (ethernet/localhost frame) removed */
/* returns Number of bytes on success, 0 for no data yet, and -1 on error */
static int ssl_DecodePacketInternal(const byte* packet, int length,
@@ -3808,5 +3829,21 @@ int ssl_GetSessionStats(unsigned int* active, unsigned int* total,
int ssl_SetConnectionCb(SSLConnCb cb)
{
ConnectionCb = cb;
return 0;
}
int ssl_SetConnectionCtx(void* ctx)
{
ConnectionCbCtx = ctx;
return 0;
}
#endif /* WOLFSSL_SNIFFER */
#endif /* WOLFCRYPT_ONLY */

8
wolfssl/sniffer.h
View File

@@ -125,6 +125,14 @@ SSL_SNIFFER_API int ssl_DecodePacketWithSessionInfo(
const unsigned char* packet, int length,
unsigned char** data, SSLInfo* sslInfo, char* error);
typedef void (*SSLConnCb)(const void* session, SSLInfo* info, void* ctx);
WOLFSSL_API
SSL_SNIFFER_API int ssl_SetConnectionCb(SSLConnCb cb);
WOLFSSL_API
SSL_SNIFFER_API int ssl_SetConnectionCtx(void* ctx);
#ifdef __cplusplus
} /* extern "C" */