From 1f444e915ec8e8abfb11dccb7b9d8340096695b4 Mon Sep 17 00:00:00 2001 From: Javier Tia Date: Sun, 10 Nov 2024 10:28:39 +0200 Subject: [PATCH] net: lwip: Add Support Server Name Indication support SNI, or Server Name Indication, is an addition to the TLS encryption protocol that enables a client device to specify the domain name it is trying to reach in the first step of the TLS handshake, preventing common name mismatch errors and not reaching to HTTPS server that enforce this condition. Since most of the websites require it nowadays add support for it. It's worth noting that this is already sent to lwIP [0] [0] https://github.com/lwip-tcpip/lwip/pull/47 Signed-off-by: Javier Tia Reviewed-by: Jerome Forissier Signed-off-by: Ilias Apalodimas --- .../lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c | 14 +++++++++----- lib/lwip/lwip/src/core/tcp_out.c | 2 +- lib/lwip/lwip/src/include/lwip/altcp_tls.h | 2 +- 3 files changed, 11 insertions(+), 7 deletions(-) diff --git a/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c b/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c index ef19821b89..6643b05ee9 100644 --- a/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c +++ b/lib/lwip/lwip/src/apps/altcp_tls/altcp_tls_mbedtls.c @@ -3,7 +3,7 @@ * Application layered TCP/TLS connection API (to be used from TCPIP thread) * * This file provides a TLS layer using mbedTLS - * + * * This version is currently compatible with the 2.x.x branch (current LTS). */ @@ -106,6 +106,7 @@ struct altcp_tls_config { u8_t pkey_count; u8_t pkey_max; mbedtls_x509_crt *ca; + char host[256]; #if defined(MBEDTLS_SSL_CACHE_C) && ALTCP_MBEDTLS_USE_SESSION_CACHE /** Inter-connection cache for fast connection startup */ struct mbedtls_ssl_cache_context cache; @@ -642,6 +643,7 @@ altcp_mbedtls_setup(void *conf, struct altcp_pcb *conn, struct altcp_pcb *inner_ /* tell mbedtls about our I/O functions */ mbedtls_ssl_set_bio(&state->ssl_context, conn, altcp_mbedtls_bio_send, altcp_mbedtls_bio_recv, NULL); + mbedtls_ssl_set_hostname(&state->ssl_context, config->host); altcp_mbedtls_setup_callbacks(conn, inner_conn); conn->inner_conn = inner_conn; conn->fns = &altcp_mbedtls_functions; @@ -951,7 +953,7 @@ altcp_tls_create_config_server_privkey_cert(const u8_t *privkey, size_t privkey_ } static struct altcp_tls_config * -altcp_tls_create_config_client_common(const u8_t *ca, size_t ca_len, int is_2wayauth) +altcp_tls_create_config_client_common(const u8_t *ca, size_t ca_len, int is_2wayauth, char *host) { int ret; struct altcp_tls_config *conf = altcp_tls_create_config(0, (is_2wayauth) ? 1 : 0, (is_2wayauth) ? 1 : 0, ca != NULL); @@ -973,13 +975,15 @@ altcp_tls_create_config_client_common(const u8_t *ca, size_t ca_len, int is_2way mbedtls_ssl_conf_ca_chain(&conf->conf, conf->ca, NULL); } + strlcpy(conf->host, host, sizeof(conf->host)); + return conf; } struct altcp_tls_config * -altcp_tls_create_config_client(const u8_t *ca, size_t ca_len) +altcp_tls_create_config_client(const u8_t *ca, size_t ca_len, char *host) { - return altcp_tls_create_config_client_common(ca, ca_len, 0); + return altcp_tls_create_config_client_common(ca, ca_len, 0, host); } struct altcp_tls_config * @@ -995,7 +999,7 @@ altcp_tls_create_config_client_2wayauth(const u8_t *ca, size_t ca_len, const u8_ return NULL; } - conf = altcp_tls_create_config_client_common(ca, ca_len, 1); + conf = altcp_tls_create_config_client_common(ca, ca_len, 1, NULL); if (conf == NULL) { return NULL; } diff --git a/lib/lwip/lwip/src/core/tcp_out.c b/lib/lwip/lwip/src/core/tcp_out.c index b5d3121373..6dbc5f96b6 100644 --- a/lib/lwip/lwip/src/core/tcp_out.c +++ b/lib/lwip/lwip/src/core/tcp_out.c @@ -2028,7 +2028,7 @@ tcp_rst(const struct tcp_pcb *pcb, u32_t seqno, u32_t ackno, u16_t local_port, u16_t remote_port) { struct pbuf *p; - + p = tcp_rst_common(pcb, seqno, ackno, local_ip, remote_ip, local_port, remote_port); if (p != NULL) { tcp_output_control_segment(pcb, p, local_ip, remote_ip); diff --git a/lib/lwip/lwip/src/include/lwip/altcp_tls.h b/lib/lwip/lwip/src/include/lwip/altcp_tls.h index fcb784d89d..fb06182344 100644 --- a/lib/lwip/lwip/src/include/lwip/altcp_tls.h +++ b/lib/lwip/lwip/src/include/lwip/altcp_tls.h @@ -92,7 +92,7 @@ struct altcp_tls_config *altcp_tls_create_config_server_privkey_cert(const u8_t /** @ingroup altcp_tls * Create an ALTCP_TLS client configuration handle */ -struct altcp_tls_config *altcp_tls_create_config_client(const u8_t *cert, size_t cert_len); +struct altcp_tls_config *altcp_tls_create_config_client(const u8_t *cert, size_t cert_len, char *host); /** @ingroup altcp_tls * Create an ALTCP_TLS client configuration handle with two-way server/client authentication -- 2.39.5