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This commit is contained in:
Juliusz Sosinowicz
2020-05-19 19:49:45 +02:00
committed by Unknown
parent 651a7a97b9
commit eb910a64d0
4 changed files with 77 additions and 45 deletions
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104
src/internal.c
View File

@@ -6904,6 +6904,9 @@ void DtlsMsgListDelete(DtlsMsg* head, void* heap)
} }
} }
/**
* Drop messages when they are no longer going to be retransmitted
*/
void DtlsTxMsgListClean(WOLFSSL* ssl) void DtlsTxMsgListClean(WOLFSSL* ssl)
{ {
DtlsMsg* head = ssl->dtls_tx_msg_list; DtlsMsg* head = ssl->dtls_tx_msg_list;
@@ -7149,8 +7152,13 @@ DtlsMsg* DtlsMsgInsert(DtlsMsg* head, DtlsMsg* item)
} }
/* DtlsMsgPoolSave() adds the message to the end of the stored transmit list. */ /**
int DtlsMsgPoolSave(WOLFSSL* ssl, const byte* data, word32 dataSz, enum HandShakeType type) * DtlsMsgPoolSave() adds the message to the end of the stored transmit
* list. Must be called BEFORE BuildMessage or DtlsSEQIncrement or
* anything else that increments ssl->keys.dtls_handshake_number.
*/
int DtlsMsgPoolSave(WOLFSSL* ssl, const byte* data, word32 dataSz,
enum HandShakeType type)
{ {
DtlsMsg* item; DtlsMsg* item;
int ret = 0; int ret = 0;
@@ -7170,8 +7178,7 @@ int DtlsMsgPoolSave(WOLFSSL* ssl, const byte* data, word32 dataSz, enum HandShak
XMEMCPY(item->buf, data, dataSz); XMEMCPY(item->buf, data, dataSz);
item->sz = dataSz; item->sz = dataSz;
item->epoch = ssl->keys.dtls_epoch; item->epoch = ssl->keys.dtls_epoch;
/* save is called after something incremented this var */ item->seq = ssl->keys.dtls_handshake_number;
item->seq = ssl->keys.dtls_handshake_number - 1;
item->type = type; item->type = type;
if (cur == NULL) if (cur == NULL)
@@ -7251,7 +7258,9 @@ int VerifyForTxDtlsMsgDelete(WOLFSSL* ssl, DtlsMsg* item)
case WOLFSSL_SERVER_END: case WOLFSSL_SERVER_END:
if (ssl->options.clientState >= CLIENT_FINISHED_COMPLETE && if (ssl->options.clientState >= CLIENT_FINISHED_COMPLETE &&
item->type <= server_hello_done) item->type <= server_hello_done)
return 1; return 1; /* server can forget everything up to ServerHelloDone if
* a client finished message has been received and
* successfully processed */
else else
return 0; return 0;
default: default:
@@ -7324,7 +7333,6 @@ int DtlsMsgPoolSend(WOLFSSL* ssl, int sendOnlyFirstPacket)
sendSz = inputSz + MAX_MSG_EXTRA; sendSz = inputSz + MAX_MSG_EXTRA;
#ifdef HAVE_SECURE_RENEGOTIATION #ifdef HAVE_SECURE_RENEGOTIATION
/* /*
* CUR_ORDER will use ssl->secure_renegotiation from epoch 2+. * CUR_ORDER will use ssl->secure_renegotiation from epoch 2+.
* ssl->keys otherwise * ssl->keys otherwise
@@ -13132,7 +13140,7 @@ static int DoDtlsHandShakeMsg(WOLFSSL* ssl, byte* input, word32* inOutIdx,
if (type == finished && ssl->keys.dtls_peer_handshake_number >= if (type == finished && ssl->keys.dtls_peer_handshake_number >=
ssl->keys.dtls_expected_peer_handshake_number && ssl->keys.dtls_expected_peer_handshake_number &&
ssl->keys.curEpoch == ssl->keys.dtls_epoch) { ssl->keys.curEpoch == ssl->keys.dtls_epoch) {
/* finished msg should be ignore if it is in the current epoch /* finished msg should be ignore from the current epoch
* if it comes from a previous handshake */ * if it comes from a previous handshake */
if (ssl->options.side == WOLFSSL_CLIENT_END) { if (ssl->options.side == WOLFSSL_CLIENT_END) {
ignoreFinished = ssl->options.connectState < FINISHED_DONE; ignoreFinished = ssl->options.connectState < FINISHED_DONE;
@@ -13153,7 +13161,10 @@ static int DoDtlsHandShakeMsg(WOLFSSL* ssl, byte* input, word32* inOutIdx,
*/ */
if (ssl->keys.dtls_peer_handshake_number > if (ssl->keys.dtls_peer_handshake_number >
ssl->keys.dtls_expected_peer_handshake_number && ssl->keys.dtls_expected_peer_handshake_number &&
(type == client_hello || ssl->options.handShakeState != HANDSHAKE_DONE) && /* Only client_hello shouldn't be ignored if the handshake
* num is greater */
(type == client_hello ||
ssl->options.handShakeState != HANDSHAKE_DONE) &&
!ignoreFinished) { !ignoreFinished) {
/* Current message is out of order. It will get stored in the list. /* Current message is out of order. It will get stored in the list.
* Storing also takes care of defragmentation. If the messages is a * Storing also takes care of defragmentation. If the messages is a
@@ -13201,6 +13212,8 @@ static int DoDtlsHandShakeMsg(WOLFSSL* ssl, byte* input, word32* inOutIdx,
} }
else if (ssl->keys.dtls_peer_handshake_number < else if (ssl->keys.dtls_peer_handshake_number <
ssl->keys.dtls_expected_peer_handshake_number || ssl->keys.dtls_expected_peer_handshake_number ||
/* ignore all handshake messages if we are done with the
* handshake */
(ssl->keys.dtls_peer_handshake_number > (ssl->keys.dtls_peer_handshake_number >
ssl->keys.dtls_expected_peer_handshake_number && ssl->keys.dtls_expected_peer_handshake_number &&
ssl->options.handShakeState == HANDSHAKE_DONE) || ssl->options.handShakeState == HANDSHAKE_DONE) ||
@@ -14060,8 +14073,10 @@ static WC_INLINE int DecryptDo(WOLFSSL* ssl, byte* plain, const byte* input,
#if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION) #if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION)
if (ssl->options.dtls && ssl->secure_renegotiation && if (ssl->options.dtls && ssl->secure_renegotiation &&
ssl->secure_renegotiation->tmp_keys.dtls_epoch != 0) { ssl->secure_renegotiation->tmp_keys.dtls_epoch != 0) {
if (ssl->keys.curEpoch == ssl->secure_renegotiation->tmp_keys.dtls_epoch) if (ssl->keys.curEpoch ==
XMEMCPY(ssl->decrypt.nonce, ssl->secure_renegotiation->tmp_keys.aead_dec_imp_IV, ssl->secure_renegotiation->tmp_keys.dtls_epoch)
XMEMCPY(ssl->decrypt.nonce,
ssl->secure_renegotiation->tmp_keys.aead_dec_imp_IV,
AESGCM_IMP_IV_SZ); AESGCM_IMP_IV_SZ);
else else
XMEMCPY(ssl->decrypt.nonce, ssl->keys.aead_dec_imp_IV, XMEMCPY(ssl->decrypt.nonce, ssl->keys.aead_dec_imp_IV,
@@ -14197,17 +14212,22 @@ static WC_INLINE int Decrypt(WOLFSSL* ssl, byte* plain, const byte* input,
#if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION) #if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION)
if (ssl->options.dtls && ssl->secure_renegotiation && if (ssl->options.dtls && ssl->secure_renegotiation &&
ssl->secure_renegotiation->tmp_keys.dtls_epoch != 0) { ssl->secure_renegotiation->tmp_keys.dtls_epoch != 0) {
if (ssl->keys.curEpoch == ssl->secure_renegotiation->tmp_keys.dtls_epoch) { /* For epochs >1 the current cipher parameters are located in
* ssl->secure_renegotiation->tmp_keys. Previous cipher
* parameters and for epoch 1 use ssl->keys */
if (ssl->keys.curEpoch ==
ssl->secure_renegotiation->tmp_keys.dtls_epoch) {
if (ssl->decrypt.src != SCR) { if (ssl->decrypt.src != SCR) {
ssl->secure_renegotiation->cache_status = SCR_CACHE_NEEDED; ssl->secure_renegotiation->cache_status =
SCR_CACHE_NEEDED;
if ((ret = SetKeysSide(ssl, DECRYPT_SIDE_ONLY)) != 0) if ((ret = SetKeysSide(ssl, DECRYPT_SIDE_ONLY)) != 0)
break; break;
} }
WOLFSSL_BUFFER(ssl->secure_renegotiation->tmp_keys.client_write_key, MAX_SYM_KEY_SIZE);
} }
else { else {
if (ssl->decrypt.src != KEYS) { if (ssl->decrypt.src != KEYS) {
ssl->secure_renegotiation->cache_status = SCR_CACHE_NULL; ssl->secure_renegotiation->cache_status =
SCR_CACHE_NULL;
if ((ret = SetKeysSide(ssl, DECRYPT_SIDE_ONLY)) != 0) if ((ret = SetKeysSide(ssl, DECRYPT_SIDE_ONLY)) != 0)
break; break;
} }
@@ -15685,9 +15705,9 @@ int SendChangeCipher(WOLFSSL* ssl)
#ifdef WOLFSSL_DTLS #ifdef WOLFSSL_DTLS
else { else {
if (IsDtlsNotSctpMode(ssl)) { if (IsDtlsNotSctpMode(ssl)) {
DtlsSEQIncrement(ssl, CUR_ORDER);
if ((ret = DtlsMsgPoolSave(ssl, output, sendSz, change_cipher_hs)) != 0) if ((ret = DtlsMsgPoolSave(ssl, output, sendSz, change_cipher_hs)) != 0)
return ret; return ret;
DtlsSEQIncrement(ssl, CUR_ORDER);
} }
} }
#endif #endif
@@ -16087,35 +16107,42 @@ int BuildMessage(WOLFSSL* ssl, byte* output, int outSz, const byte* input,
#if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION) #if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION)
if (ssl->options.dtls && ssl->secure_renegotiation && if (ssl->options.dtls && ssl->secure_renegotiation &&
ssl->secure_renegotiation->tmp_keys.dtls_epoch != 0) { ssl->secure_renegotiation->tmp_keys.dtls_epoch != 0) {
/* For epochs >1 the current cipher parameters are located in
* ssl->secure_renegotiation->tmp_keys. Previous cipher
* parameters and for epoch 1 use ssl->keys */
switch (epochOrder) { switch (epochOrder) {
case PREV_ORDER: case PREV_ORDER:
if (ssl->encrypt.src != KEYS) { if (ssl->encrypt.src != KEYS) {
ssl->secure_renegotiation->cache_status = SCR_CACHE_NULL; ssl->secure_renegotiation->cache_status =
SCR_CACHE_NULL;
if ((ret = SetKeysSide(ssl, ENCRYPT_SIDE_ONLY)) != 0) if ((ret = SetKeysSide(ssl, ENCRYPT_SIDE_ONLY)) != 0)
ERROR_OUT(ret, exit_buildmsg); ERROR_OUT(ret, exit_buildmsg);
WOLFSSL_BUFFER(ssl->keys.client_write_key, MAX_SYM_KEY_SIZE);
} }
break; break;
case CUR_ORDER: case CUR_ORDER:
if (ssl->keys.dtls_epoch == ssl->secure_renegotiation->tmp_keys.dtls_epoch) { if (ssl->keys.dtls_epoch ==
ssl->secure_renegotiation->tmp_keys.dtls_epoch) {
if (ssl->encrypt.src != SCR) { if (ssl->encrypt.src != SCR) {
ssl->secure_renegotiation->cache_status = SCR_CACHE_NEEDED; ssl->secure_renegotiation->cache_status =
if ((ret = SetKeysSide(ssl, ENCRYPT_SIDE_ONLY)) != 0) SCR_CACHE_NEEDED;
if ((ret = SetKeysSide(ssl, ENCRYPT_SIDE_ONLY))
!= 0)
ERROR_OUT(ret, exit_buildmsg); ERROR_OUT(ret, exit_buildmsg);
WOLFSSL_BUFFER(ssl->secure_renegotiation->tmp_keys.client_write_key, MAX_SYM_KEY_SIZE);
} }
} }
else { else {
if (ssl->encrypt.src != KEYS) { if (ssl->encrypt.src != KEYS) {
ssl->secure_renegotiation->cache_status = SCR_CACHE_NULL; ssl->secure_renegotiation->cache_status =
if ((ret = SetKeysSide(ssl, ENCRYPT_SIDE_ONLY)) != 0) SCR_CACHE_NULL;
if ((ret = SetKeysSide(ssl, ENCRYPT_SIDE_ONLY))
!= 0)
ERROR_OUT(ret, exit_buildmsg); ERROR_OUT(ret, exit_buildmsg);
WOLFSSL_BUFFER(ssl->keys.client_write_key, MAX_SYM_KEY_SIZE);
} }
} }
break; break;
default: default:
WOLFSSL_MSG("BuildMessage only supports PREV_ORDER and CUR_ORDER"); WOLFSSL_MSG("BuildMessage only supports PREV_ORDER and "
"CUR_ORDER");
ERROR_OUT(BAD_FUNC_ARG, exit_buildmsg); ERROR_OUT(BAD_FUNC_ARG, exit_buildmsg);
} }
} }
@@ -16326,8 +16353,8 @@ int BuildMessage(WOLFSSL* ssl, byte* output, int outSz, const byte* input,
case BUILD_MSG_ENCRYPT: case BUILD_MSG_ENCRYPT:
{ {
#if defined(HAVE_SECURE_RENEGOTIATION) && defined(WOLFSSL_DTLS) #if defined(HAVE_SECURE_RENEGOTIATION) && defined(WOLFSSL_DTLS)
/* Modify CUR_ORDER sequence number for all encryption algos /* If we want the PREV_ORDER then modify CUR_ORDER sequence number
* that use it for encryption parameters */ * for all encryption algos that use it for encryption parameters */
word16 dtls_epoch; word16 dtls_epoch;
word16 dtls_sequence_number_hi; word16 dtls_sequence_number_hi;
word32 dtls_sequence_number_lo; word32 dtls_sequence_number_lo;
@@ -16341,8 +16368,10 @@ int BuildMessage(WOLFSSL* ssl, byte* output, int outSz, const byte* input,
dtls_sequence_number_hi = ssl->keys.dtls_sequence_number_hi; dtls_sequence_number_hi = ssl->keys.dtls_sequence_number_hi;
dtls_sequence_number_lo = ssl->keys.dtls_sequence_number_lo; dtls_sequence_number_lo = ssl->keys.dtls_sequence_number_lo;
ssl->keys.dtls_epoch--; ssl->keys.dtls_epoch--;
ssl->keys.dtls_sequence_number_hi = ssl->keys.dtls_prev_sequence_number_hi; ssl->keys.dtls_sequence_number_hi =
ssl->keys.dtls_sequence_number_lo = ssl->keys.dtls_prev_sequence_number_lo; ssl->keys.dtls_prev_sequence_number_hi;
ssl->keys.dtls_sequence_number_lo =
ssl->keys.dtls_prev_sequence_number_lo;
} }
#endif #endif
#if defined(HAVE_ENCRYPT_THEN_MAC) && !defined(WOLFSSL_AEAD_ONLY) #if defined(HAVE_ENCRYPT_THEN_MAC) && !defined(WOLFSSL_AEAD_ONLY)
@@ -17145,12 +17174,12 @@ int SendCertificateRequest(WOLFSSL* ssl)
} else { } else {
sendSz = i; sendSz = i;
#ifdef WOLFSSL_DTLS #ifdef WOLFSSL_DTLS
if (ssl->options.dtls)
DtlsSEQIncrement(ssl, CUR_ORDER);
if (IsDtlsNotSctpMode(ssl)) { if (IsDtlsNotSctpMode(ssl)) {
if ((ret = DtlsMsgPoolSave(ssl, output, sendSz, certificate_request)) != 0) if ((ret = DtlsMsgPoolSave(ssl, output, sendSz, certificate_request)) != 0)
return ret; return ret;
} }
if (ssl->options.dtls)
DtlsSEQIncrement(ssl, CUR_ORDER);
#endif #endif
ret = HashOutput(ssl, output, sendSz, 0); ret = HashOutput(ssl, output, sendSz, 0);
if (ret != 0) if (ret != 0)
@@ -17244,6 +17273,8 @@ static int BuildCertificateStatus(WOLFSSL* ssl, byte type, buffer* status,
return MEMORY_E; return MEMORY_E;
XMEMCPY(input, output + recordHeaderSz, inputSz); XMEMCPY(input, output + recordHeaderSz, inputSz);
ret = DtlsMsgPoolSave(ssl, input, inputSz, certificate_status);
if (ret == 0)
sendSz = BuildMessage(ssl, output, sendSz, input, inputSz, sendSz = BuildMessage(ssl, output, sendSz, input, inputSz,
handshake, 1, 0, 0, CUR_ORDER); handshake, 1, 0, 0, CUR_ORDER);
XFREE(input, ssl->heap, DYNAMIC_TYPE_IN_BUFFER); XFREE(input, ssl->heap, DYNAMIC_TYPE_IN_BUFFER);
@@ -17253,17 +17284,14 @@ static int BuildCertificateStatus(WOLFSSL* ssl, byte type, buffer* status,
} }
else { else {
#ifdef WOLFSSL_DTLS #ifdef WOLFSSL_DTLS
if (ssl->options.dtls) if (ret == 0 && IsDtlsNotSctpMode(ssl))
ret = DtlsMsgPoolSave(ssl, output, sendSz, certificate_status);
if (ret == 0 && ssl->options.dtls)
DtlsSEQIncrement(ssl, CUR_ORDER); DtlsSEQIncrement(ssl, CUR_ORDER);
#endif #endif
ret = HashOutput(ssl, output, sendSz, 0); ret = HashOutput(ssl, output, sendSz, 0);
} }
#ifdef WOLFSSL_DTLS
if (ret == 0 && IsDtlsNotSctpMode(ssl))
ret = DtlsMsgPoolSave(ssl, output, sendSz, certificate_status);
#endif
#if defined(WOLFSSL_CALLBACKS) || defined(OPENSSL_EXTRA) #if defined(WOLFSSL_CALLBACKS) || defined(OPENSSL_EXTRA)
if (ret == 0 && ssl->hsInfoOn) if (ret == 0 && ssl->hsInfoOn)
AddPacketName(ssl, "CertificateStatus"); AddPacketName(ssl, "CertificateStatus");
@@ -17614,7 +17642,7 @@ int SendData(WOLFSSL* ssl, const void* data, int sz)
else { else {
#ifdef WOLFSSL_TLS13 #ifdef WOLFSSL_TLS13
sendSz = BuildTls13Message(ssl, out, outputSz, sendBuffer, buffSz, sendSz = BuildTls13Message(ssl, out, outputSz, sendBuffer, buffSz,
application_data, 0, 0, 1, CUR_ORDER); application_data, 0, 0, 1);
#else #else
sendSz = BUFFER_ERROR; sendSz = BUFFER_ERROR;
#endif #endif

2
src/keys.c
View File

@@ -3241,7 +3241,7 @@ int StoreKeys(WOLFSSL* ssl, const byte* keyData, int side)
ssl->secure_renegotiation->cache_status == SCR_CACHE_NEEDED) { ssl->secure_renegotiation->cache_status == SCR_CACHE_NEEDED) {
keys = &ssl->secure_renegotiation->tmp_keys; keys = &ssl->secure_renegotiation->tmp_keys;
#ifdef WOLFSSL_DTLS #ifdef WOLFSSL_DTLS
/* epoch is incremented after StoreKeys call */ /* epoch is incremented after StoreKeys is called */
ssl->secure_renegotiation->tmp_keys.dtls_epoch = ssl->keys.dtls_epoch + 1; ssl->secure_renegotiation->tmp_keys.dtls_epoch = ssl->keys.dtls_epoch + 1;
/* we only need to copy keys on second and future renegotiations */ /* we only need to copy keys on second and future renegotiations */
if (ssl->keys.dtls_epoch > 1) if (ssl->keys.dtls_epoch > 1)

3
src/ssl.c
View File

@@ -3240,6 +3240,9 @@ const byte* wolfSSL_GetDtlsMacSecret(WOLFSSL* ssl, int verify, int epochOrder)
return NULL; return NULL;
#ifdef HAVE_SECURE_RENEGOTIATION #ifdef HAVE_SECURE_RENEGOTIATION
/* ssl->keys contains the current cipher parameters only for epoch 1. For
* epochs >1 ssl->secure_renegotiation->tmp_keys contains the current
* cipher parameters */
switch (epochOrder) { switch (epochOrder) {
case PEER_ORDER: case PEER_ORDER:
if (ssl->secure_renegotiation && if (ssl->secure_renegotiation &&

3
wolfssl/internal.h
View File

@@ -3050,7 +3050,8 @@ typedef struct Ciphers {
byte state; byte state;
byte setup; /* have we set it up flag for detection */ byte setup; /* have we set it up flag for detection */
#if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION) #if defined(WOLFSSL_DTLS) && defined(HAVE_SECURE_RENEGOTIATION)
enum CipherSrc src; enum CipherSrc src; /* DTLS uses this to determine which keys
* are currently loaded */
#endif #endif
} Ciphers; } Ciphers;