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Add supported_curves/groups extension

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This allows us to use a ciphersuite that will still be supported in 4.0.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
This commit is contained in:
Manuel Pégourié-Gonnard 2025-02-12 12:36:28 +01:00
parent 6637ef798f
commit e916652390
2 changed files with 30 additions and 13 deletions
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30
tests/suites/test_suite_ssl.data
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@ -3330,7 +3330,7 @@ tls13_srv_max_early_data_size:TEST_EARLY_DATA_HRR:3:3
TLS 1.3 srv, max early data size, HRR, 98, wsz=49
tls13_srv_max_early_data_size:TEST_EARLY_DATA_HRR:97:0
# 1.2 minimal ClientHello breakdown:
# (Minimal) ClientHello breakdown:
# 160303rlrl - record header, 2-byte record contents len
# 01hlhlhl - handshake header, 3-byte handshake message len
# 0303 - protocol version: 1.2
@ -3338,23 +3338,37 @@ tls13_srv_max_early_data_size:TEST_EARLY_DATA_HRR:97:0
# 00 - session ID (empty)
# 0002cvcv - ciphersuite list: 2-byte len + list of 2-byte values (see below)
# 0100 - compression methods: 1-byte len then "null" (only legal value now)
# [then end, or extensions]
# [then end, or extensions, see notes below]
# elel - 2-byte extensions length
# ...
# 000a - elliptic_curves aka supported_groups
# 0004 - extension length
# 0002 - length of named_curve_list / named_group_list
# 0017 - secp256r1 aka NIST P-256
# ...
#
# Note: currently our TLS "1.3 or 1.2" code requires extension length to be
# present even it it's 0. This is not strictly compliant but doesn't matter
# much in practice as these days everyone wants to use signature_algorithms
# (for hashes better than SHA-1), secure_renego (even if you have renego
# disabled), and most people want either ECC or PSK related extensions.
# See https://github.com/Mbed-TLS/mbedtls/issues/9963
#
# Also, currently we won't negotiate ECC ciphersuites unless at least the
# supported_groups extension is present, see
# https://github.com/Mbed-TLS/mbedtls/issues/7458
#
# Note: cccc is currently not assigned, so can be used get a consistent
# "no matching ciphersuite" behaviour regardless of the configuration.
# 002f is MBEDTLS_TLS_RSA_WITH_AES_128_CBC_SHA, MTI in 1.2, but removed in 4.0.
Inject ClientHello - TLS 1.2 good (for reference)
depends_on:MBEDTLS_SSL_PROTO_TLS1_2:MBEDTLS_KEY_EXCHANGE_RSA_ENABLED:MBEDTLS_SSL_HAVE_AES:MBEDTLS_MD_CAN_SHA1:MBEDTLS_SSL_HAVE_CBC
inject_client_content_on_the_wire:MBEDTLS_SSL_CLIENT_HELLO:"160303002f0100002b03030123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef000002002f01000000":"<= parse client hello":0
# c02b is MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (1.2)
# See "ClientHello breakdown" above
# MBEDTLS_TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 with secp256r1
Inject ClientHello - TLS 1.2 good (for reference)
depends_on:MBEDTLS_SSL_PROTO_TLS1_2:MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED:MBEDTLS_SSL_HAVE_AES:MBEDTLS_MD_CAN_SHA256:MBEDTLS_SSL_HAVE_GCM:MBEDTLS_ECP_HAVE_SECP256R1
inject_client_content_on_the_wire:MBEDTLS_PK_ECDSA:MBEDTLS_SSL_CLIENT_HELLO:"16030300370100003303030123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef000002c02b01000008000a000400020017":"<= parse client hello":0
# See "ClientHello breakdown" above
Inject ClientHello - TLS 1.2 unknown ciphersuite (for reference)
depends_on:MBEDTLS_SSL_PROTO_TLS1_2
inject_client_content_on_the_wire:MBEDTLS_SSL_CLIENT_HELLO:"160303002f0100002b03030123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef000002cccc01000000":"got no ciphersuites in common":MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE
depends_on:MBEDTLS_SSL_PROTO_TLS1_2:MBEDTLS_RSA_C
inject_client_content_on_the_wire:MBEDTLS_PK_RSA:MBEDTLS_SSL_CLIENT_HELLO:"160303002f0100002b03030123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef000002cccc01000000":"got no ciphersuites in common":MBEDTLS_ERR_SSL_HANDSHAKE_FAILURE

13
tests/suites/test_suite_ssl.function
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@ -5015,8 +5015,9 @@ exit:
/* END_CASE */
/* BEGIN_CASE */
void inject_client_content_on_the_wire(int state, data_t *hello, char *log_pattern,
int expected_ret)
void inject_client_content_on_the_wire(int pk_alg,
int state, data_t *data,
char *log_pattern, int expected_ret)
{
/* This function allows us to inject content at a specific state
* in the handshake, or when it's completed. The content is injected
@ -5045,7 +5046,9 @@ void inject_client_content_on_the_wire(int state, data_t *hello, char *log_patte
srv_pattern.pattern = log_pattern;
options.srv_log_obj = &srv_pattern;
options.srv_log_fun = mbedtls_test_ssl_log_analyzer;
mbedtls_debug_set_threshold(3);
mbedtls_debug_set_threshold(5);
options.pk_alg = pk_alg;
ret = mbedtls_test_ssl_endpoint_init(&server, MBEDTLS_SSL_IS_SERVER,
&options, NULL, NULL, NULL);
@ -5064,8 +5067,8 @@ void inject_client_content_on_the_wire(int state, data_t *hello, char *log_patte
TEST_EQUAL(ret, 0);
/* Send the crafted message */
ret = mbedtls_test_mock_tcp_send_b(&client.socket, hello->x, hello->len);
TEST_ASSERT(ret >= 0 && (size_t) ret == hello->len);
ret = mbedtls_test_mock_tcp_send_b(&client.socket, data->x, data->len);
TEST_ASSERT(ret >= 0 && (size_t) ret == data->len);
/* Have the server process it.
* Need the loop because a server that support 1.3 and 1.2