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Merge pull request #8697 from BensonLiou/random_bye_on_hrr

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Do not generate new random number while receiving HRR
This commit is contained in:
Gilles Peskine
2024-03-14 15:59:21 +00:00
committed by GitHub
parent 50da462fc8 93b305dc8e
commit 1c5ebf4352
3 changed files with 21 additions and 5 deletions
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3
ChangeLog.d/fix-new-rn-on-hrr.txt Normal file
View File

@ -0,0 +1,3 @@
Bugfix
* In TLS 1.3 clients, fix an interoperability problem due to the client
generating a new random after a HelloRetryRequest. Fixes #8669.

13
library/ssl_client.c
View File

@ -792,10 +792,15 @@ static int ssl_prepare_client_hello(mbedtls_ssl_context *ssl)
(ssl->handshake->cookie == NULL))
#endif
{
ret = ssl_generate_random(ssl);
if (ret != 0) {
MBEDTLS_SSL_DEBUG_RET(1, "Random bytes generation failed", ret);
return ret;
#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
if (!ssl->handshake->hello_retry_request_flag)
#endif
{
ret = ssl_generate_random(ssl);
if (ret != 0) {
MBEDTLS_SSL_DEBUG_RET(1, "Random bytes generation failed", ret);
return ret;
}
}
}

10
tests/suites/test_suite_ssl.function
View File

@ -2396,7 +2396,7 @@ void ssl_session_serialize_version_check(int corrupt_major,
* corrupt them bit-by-bit. */
for (cur_byte = 0; cur_byte < sizeof(should_corrupt_byte); cur_byte++) {
int cur_bit;
unsigned char * const byte = &serialized_session[cur_byte];
unsigned char *const byte = &serialized_session[cur_byte];
if (should_corrupt_byte[cur_byte] == 0) {
continue;
@ -3850,6 +3850,7 @@ void tls13_cli_early_data_state(int scenario)
MBEDTLS_SSL_IANA_TLS_GROUP_SECP384R1,
MBEDTLS_SSL_IANA_TLS_GROUP_NONE
};
uint8_t client_random[MBEDTLS_CLIENT_HELLO_RANDOM_LEN];
mbedtls_platform_zeroize(&client_ep, sizeof(client_ep));
mbedtls_platform_zeroize(&server_ep, sizeof(server_ep));
@ -3987,9 +3988,16 @@ void tls13_cli_early_data_state(int scenario)
if (!client_ep.ssl.handshake->hello_retry_request_flag) {
TEST_EQUAL(client_ep.ssl.early_data_state,
MBEDTLS_SSL_EARLY_DATA_STATE_CAN_WRITE);
memcpy(client_random,
client_ep.ssl.handshake->randbytes,
MBEDTLS_CLIENT_HELLO_RANDOM_LEN);
} else {
TEST_EQUAL(client_ep.ssl.early_data_state,
MBEDTLS_SSL_EARLY_DATA_STATE_REJECTED);
TEST_MEMORY_COMPARE(client_random,
MBEDTLS_CLIENT_HELLO_RANDOM_LEN,
client_ep.ssl.handshake->randbytes,
MBEDTLS_CLIENT_HELLO_RANDOM_LEN);
}
break;