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Merge pull request #5448 from julek-wolfssl/ext-msg-check

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Validate that extensions appear in correct messages
This commit is contained in:
Sean Parkinson
2022-08-12 08:39:42 +10:00
committed by GitHub
parent 2b38ba0300 a317126509
commit d4646696ed
1 changed files with 124 additions and 75 deletions
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199
src/tls.c
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@ -12264,17 +12264,18 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_SNI) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != encrypted_extensions) { msgType != encrypted_extensions)
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
}
else if (!IsAtLeastTLSv1_3(ssl->version) &&
msgType == encrypted_extensions) {
return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello)
return EXT_NOT_ALLOWED;
}
ret = SNI_PARSE(ssl, input + offset, size, isRequest); ret = SNI_PARSE(ssl, input + offset, size, isRequest);
break; break;
#endif #endif
@ -12285,13 +12286,18 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_TRUSTED_CA) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != encrypted_extensions) { msgType != encrypted_extensions)
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello)
return EXT_NOT_ALLOWED;
}
ret = TCA_PARSE(ssl, input + offset, size, isRequest); ret = TCA_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12301,19 +12307,23 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_MAX_FRAGMENT) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != encrypted_extensions) { msgType != encrypted_extensions) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED); WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
else if (!IsAtLeastTLSv1_3(ssl->version) &&
msgType == encrypted_extensions) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello &&
msgType != server_hello) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
}
}
ret = MFL_PARSE(ssl, input + offset, size, isRequest); ret = MFL_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12323,10 +12333,12 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_TRUNCATED_HMAC) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version)) if (IsAtLeastTLSv1_3(ssl->version))
break; break;
#endif #endif
if (msgType != client_hello)
return EXT_NOT_ALLOWED;
ret = THM_PARSE(ssl, input + offset, size, isRequest); ret = THM_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12336,19 +12348,22 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_SUPPORTED_CURVES) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != encrypted_extensions) { msgType != encrypted_extensions) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED); WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
else if (!IsAtLeastTLSv1_3(ssl->version) &&
msgType == encrypted_extensions) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
}
}
ret = EC_PARSE(ssl, input + offset, size, isRequest); ret = EC_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12358,10 +12373,16 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_SUPPORTED_CURVES) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version)) if (IsAtLeastTLSv1_3(ssl->version))
break; break;
#endif #endif
if (msgType != client_hello &&
msgType != server_hello) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
}
ret = PF_PARSE(ssl, input + offset, size, isRequest); ret = PF_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12371,14 +12392,20 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_CERTIFICATE_STATUS_REQUEST) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != certificate_request && msgType != certificate_request &&
msgType != certificate) { msgType != certificate)
break; return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
}
ret = CSR_PARSE(ssl, input + offset, size, isRequest); ret = CSR_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12389,13 +12416,19 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2) #if defined(WOLFSSL_TLS13) && defined(HAVE_CERTIFICATE_STATUS_REQUEST_V2)
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != certificate_request && msgType != certificate_request &&
msgType != certificate) { msgType != certificate)
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
}
ret = CSR2_PARSE(ssl, input + offset, size, isRequest); ret = CSR2_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12410,6 +12443,9 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
if (IsAtLeastTLSv1_3(ssl->version)) if (IsAtLeastTLSv1_3(ssl->version))
break; break;
#endif #endif
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
if (size != 0) if (size != 0)
return BUFFER_ERROR; return BUFFER_ERROR;
@ -12427,10 +12463,13 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_SERVER_RENEGOTIATION_INFO) #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version)) if (IsAtLeastTLSv1_3(ssl->version))
break; break;
#endif #endif
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
ret = SCR_PARSE(ssl, input + offset, size, isRequest); ret = SCR_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12441,11 +12480,17 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET) #if defined(WOLFSSL_TLS13) && defined(HAVE_SESSION_TICKET)
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello) { if (msgType != client_hello)
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
}
ret = WOLF_STK_PARSE(ssl, input + offset, size, isRequest); ret = WOLF_STK_PARSE(ssl, input + offset, size, isRequest);
break; break;
@ -12457,16 +12502,18 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
#endif #endif
#if defined(WOLFSSL_TLS13) && defined(HAVE_ALPN) #if defined(WOLFSSL_TLS13) && defined(HAVE_ALPN)
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != encrypted_extensions) { msgType != encrypted_extensions)
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
}
else if (!IsAtLeastTLSv1_3(ssl->version) &&
msgType == encrypted_extensions) {
return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
}
ret = ALPN_PARSE(ssl, input + offset, size, isRequest); ret = ALPN_PARSE(ssl, input + offset, size, isRequest);
break; break;
#if !defined(NO_CERTS) && !defined(WOLFSSL_NO_SIGALG) #if !defined(NO_CERTS) && !defined(WOLFSSL_NO_SIGALG)
@ -12479,12 +12526,17 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
if (!IsAtLeastTLSv1_2(ssl)) if (!IsAtLeastTLSv1_2(ssl))
break; break;
#ifdef WOLFSSL_TLS13 #ifdef WOLFSSL_TLS13
if (IsAtLeastTLSv1_3(ssl->version) && if (IsAtLeastTLSv1_3(ssl->version)) {
msgType != client_hello && if (msgType != client_hello &&
msgType != certificate_request) { msgType != certificate_request)
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
else
#endif #endif
{
if (msgType != client_hello)
return EXT_NOT_ALLOWED;
}
ret = SA_PARSE(ssl, input + offset, size, isRequest, suites); ret = SA_PARSE(ssl, input + offset, size, isRequest, suites);
break; break;
#endif #endif
@ -12496,6 +12548,9 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
/* Ignore for TLS 1.3+ */ /* Ignore for TLS 1.3+ */
if (IsAtLeastTLSv1_3(ssl->version)) if (IsAtLeastTLSv1_3(ssl->version))
break; break;
if (msgType != client_hello &&
msgType != server_hello)
return EXT_NOT_ALLOWED;
ret = ETM_PARSE(ssl, input + offset, size, msgType); ret = ETM_PARSE(ssl, input + offset, size, msgType);
break; break;
@ -12507,6 +12562,10 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
#ifdef WOLFSSL_DEBUG_TLS #ifdef WOLFSSL_DEBUG_TLS
WOLFSSL_BUFFER(input + offset, size); WOLFSSL_BUFFER(input + offset, size);
#endif #endif
if (msgType != client_hello &&
msgType != server_hello &&
msgType != hello_retry_request)
return EXT_NOT_ALLOWED;
break; break;
@ -12521,7 +12580,7 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
break; break;
if (msgType != client_hello && if (msgType != client_hello &&
msgType != hello_retry_request) { msgType != hello_retry_request) {
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
@ -12539,7 +12598,8 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
if (!IsAtLeastTLSv1_3(ssl->version)) if (!IsAtLeastTLSv1_3(ssl->version))
break; break;
if (msgType != client_hello && msgType != server_hello) { if (msgType != client_hello &&
msgType != server_hello) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED); WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
@ -12577,13 +12637,7 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
break; break;
if (msgType != client_hello && msgType != session_ticket && if (msgType != client_hello && msgType != session_ticket &&
msgType != encrypted_extensions) { msgType != encrypted_extensions) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
}
if (!IsAtLeastTLSv1_3(ssl->version) &&
(msgType == session_ticket ||
msgType == encrypted_extensions)) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED); WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
@ -12625,11 +12679,6 @@ int TLSX_Parse(WOLFSSL* ssl, const byte* input, word16 length, byte msgType,
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED); WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED; return EXT_NOT_ALLOWED;
} }
if (!IsAtLeastTLSv1_3(ssl->version) &&
msgType == certificate_request) {
WOLFSSL_ERROR_VERBOSE(EXT_NOT_ALLOWED);
return EXT_NOT_ALLOWED;
}
ret = SAC_PARSE(ssl, input + offset, size, isRequest); ret = SAC_PARSE(ssl, input + offset, size, isRequest);
break; break;