Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206

1 files changed, 342 insertions, 0 deletions

diff --git a/programs/ssl/dtls_client.c b/programs/ssl/dtls_client.c
new file mode 100644
index 00000000000..ddb3c34b915
--- /dev/null
+++ b/programs/ssl/dtls_client.c
@@ -0,0 +1,342 @@
+/*
+ *  Simple DTLS client demonstration program
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/platform.h"
+
+#if !defined(MBEDTLS_SSL_CLI_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) ||    \
+    !defined(MBEDTLS_NET_C)  || !defined(MBEDTLS_TIMING_C) ||             \
+    !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) ||        \
+    !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_RSA_C) ||      \
+    !defined(MBEDTLS_PEM_PARSE_C)
+int main(void)
+{
+    mbedtls_printf("MBEDTLS_SSL_CLI_C and/or MBEDTLS_SSL_PROTO_DTLS and/or "
+                   "MBEDTLS_NET_C and/or MBEDTLS_TIMING_C and/or "
+                   "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or "
+                   "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_RSA_C and/or "
+                   "MBEDTLS_PEM_PARSE_C not defined.\n");
+    mbedtls_exit(0);
+}
+#else
+
+#include <string.h>
+
+#include "mbedtls/net_sockets.h"
+#include "mbedtls/debug.h"
+#include "mbedtls/ssl.h"
+#include "mbedtls/entropy.h"
+#include "mbedtls/ctr_drbg.h"
+#include "mbedtls/error.h"
+#include "mbedtls/timing.h"
+#include "test/certs.h"
+
+/* Uncomment out the following line to default to IPv4 and disable IPv6 */
+//#define FORCE_IPV4
+
+#define SERVER_PORT "4433"
+#define SERVER_NAME "localhost"
+
+#ifdef FORCE_IPV4
+#define SERVER_ADDR "127.0.0.1"     /* Forces IPv4 */
+#else
+#define SERVER_ADDR "::1"
+#endif
+
+#define MESSAGE     "Echo this"
+
+#define READ_TIMEOUT_MS 1000
+#define MAX_RETRY       5
+
+#define DEBUG_LEVEL 0
+
+
+static void my_debug(void *ctx, int level,
+                     const char *file, int line,
+                     const char *str)
+{
+    ((void) level);
+
+    mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str);
+    fflush((FILE *) ctx);
+}
+
+int main(int argc, char *argv[])
+{
+    int ret, len;
+    mbedtls_net_context server_fd;
+    uint32_t flags;
+    unsigned char buf[1024];
+    const char *pers = "dtls_client";
+    int retry_left = MAX_RETRY;
+
+    mbedtls_entropy_context entropy;
+    mbedtls_ctr_drbg_context ctr_drbg;
+    mbedtls_ssl_context ssl;
+    mbedtls_ssl_config conf;
+    mbedtls_x509_crt cacert;
+    mbedtls_timing_delay_context timer;
+
+    ((void) argc);
+    ((void) argv);
+
+#if defined(MBEDTLS_DEBUG_C)
+    mbedtls_debug_set_threshold(DEBUG_LEVEL);
+#endif
+
+    /*
+     * 0. Initialize the RNG and the session data
+     */
+    mbedtls_net_init(&server_fd);
+    mbedtls_ssl_init(&ssl);
+    mbedtls_ssl_config_init(&conf);
+    mbedtls_x509_crt_init(&cacert);
+    mbedtls_ctr_drbg_init(&ctr_drbg);
+    mbedtls_entropy_init(&entropy);
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_status_t status = psa_crypto_init();
+    if (status != PSA_SUCCESS) {
+        mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
+                        (int) status);
+        ret = MBEDTLS_ERR_SSL_HW_ACCEL_FAILED;
+        goto exit;
+    }
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
+    mbedtls_printf("\n  . Seeding the random number generator...");
+    fflush(stdout);
+
+    if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
+                                     (const unsigned char *) pers,
+                                     strlen(pers))) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret);
+        goto exit;
+    }
+
+    mbedtls_printf(" ok\n");
+
+    /*
+     * 0. Load certificates
+     */
+    mbedtls_printf("  . Loading the CA root certificate ...");
+    fflush(stdout);
+
+    ret = mbedtls_x509_crt_parse(&cacert, (const unsigned char *) mbedtls_test_cas_pem,
+                                 mbedtls_test_cas_pem_len);
+    if (ret < 0) {
+        mbedtls_printf(" failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n",
+                       (unsigned int) -ret);
+        goto exit;
+    }
+
+    mbedtls_printf(" ok (%d skipped)\n", ret);
+
+    /*
+     * 1. Start the connection
+     */
+    mbedtls_printf("  . Connecting to udp/%s/%s...", SERVER_NAME, SERVER_PORT);
+    fflush(stdout);
+
+    if ((ret = mbedtls_net_connect(&server_fd, SERVER_ADDR,
+                                   SERVER_PORT, MBEDTLS_NET_PROTO_UDP)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_net_connect returned %d\n\n", ret);
+        goto exit;
+    }
+
+    mbedtls_printf(" ok\n");
+
+    /*
+     * 2. Setup stuff
+     */
+    mbedtls_printf("  . Setting up the DTLS structure...");
+    fflush(stdout);
+
+    if ((ret = mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_DATAGRAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
+        goto exit;
+    }
+
+    /* OPTIONAL is usually a bad choice for security, but makes interop easier
+     * in this simplified example, in which the ca chain is hardcoded.
+     * Production code should set a proper ca chain and use REQUIRED. */
+    mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
+    mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
+    mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
+    mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
+    mbedtls_ssl_conf_read_timeout(&conf, READ_TIMEOUT_MS);
+
+    if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret);
+        goto exit;
+    }
+
+    if ((ret = mbedtls_ssl_set_hostname(&ssl, SERVER_NAME)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n", ret);
+        goto exit;
+    }
+
+    mbedtls_ssl_set_bio(&ssl, &server_fd,
+                        mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout);
+
+    mbedtls_ssl_set_timer_cb(&ssl, &timer, mbedtls_timing_set_delay,
+                             mbedtls_timing_get_delay);
+
+    mbedtls_printf(" ok\n");
+
+    /*
+     * 4. Handshake
+     */
+    mbedtls_printf("  . Performing the DTLS handshake...");
+    fflush(stdout);
+
+    do {
+        ret = mbedtls_ssl_handshake(&ssl);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+             ret == MBEDTLS_ERR_SSL_WANT_WRITE);
+
+    if (ret != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n",
+                       (unsigned int) -ret);
+        goto exit;
+    }
+
+    mbedtls_printf(" ok\n");
+
+    /*
+     * 5. Verify the server certificate
+     */
+    mbedtls_printf("  . Verifying peer X.509 certificate...");
+
+    /* In real life, we would have used MBEDTLS_SSL_VERIFY_REQUIRED so that the
+     * handshake would not succeed if the peer's cert is bad.  Even if we used
+     * MBEDTLS_SSL_VERIFY_OPTIONAL, we would bail out here if ret != 0 */
+    if ((flags = mbedtls_ssl_get_verify_result(&ssl)) != 0) {
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+        char vrfy_buf[512];
+#endif
+
+        mbedtls_printf(" failed\n");
+
+#if !defined(MBEDTLS_X509_REMOVE_INFO)
+        mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), "  ! ", flags);
+
+        mbedtls_printf("%s\n", vrfy_buf);
+#endif
+    } else {
+        mbedtls_printf(" ok\n");
+    }
+
+    /*
+     * 6. Write the echo request
+     */
+send_request:
+    mbedtls_printf("  > Write to server:");
+    fflush(stdout);
+
+    len = sizeof(MESSAGE) - 1;
+
+    do {
+        ret = mbedtls_ssl_write(&ssl, (unsigned char *) MESSAGE, len);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+             ret == MBEDTLS_ERR_SSL_WANT_WRITE);
+
+    if (ret < 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_write returned %d\n\n", ret);
+        goto exit;
+    }
+
+    len = ret;
+    mbedtls_printf(" %d bytes written\n\n%s\n\n", len, MESSAGE);
+
+    /*
+     * 7. Read the echo response
+     */
+    mbedtls_printf("  < Read from server:");
+    fflush(stdout);
+
+    len = sizeof(buf) - 1;
+    memset(buf, 0, sizeof(buf));
+
+    do {
+        ret = mbedtls_ssl_read(&ssl, buf, len);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+             ret == MBEDTLS_ERR_SSL_WANT_WRITE);
+
+    if (ret <= 0) {
+        switch (ret) {
+            case MBEDTLS_ERR_SSL_TIMEOUT:
+                mbedtls_printf(" timeout\n\n");
+                if (retry_left-- > 0) {
+                    goto send_request;
+                }
+                goto exit;
+
+            case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
+                mbedtls_printf(" connection was closed gracefully\n");
+                goto close_notify;
+
+            default:
+                mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n\n", (unsigned int) -ret);
+                goto exit;
+        }
+    }
+
+    len = ret;
+    mbedtls_printf(" %d bytes read\n\n%s\n\n", len, buf);
+
+    /*
+     * 8. Done, cleanly close the connection
+     */
+close_notify:
+    mbedtls_printf("  . Closing the connection...");
+
+    /* No error checking, the connection might be closed already */
+    do {
+        ret = mbedtls_ssl_close_notify(&ssl);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_WRITE);
+    ret = 0;
+
+    mbedtls_printf(" done\n");
+
+    /*
+     * 9. Final clean-ups and exit
+     */
+exit:
+
+#ifdef MBEDTLS_ERROR_C
+    if (ret != 0) {
+        char error_buf[100];
+        mbedtls_strerror(ret, error_buf, 100);
+        mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
+    }
+#endif
+
+    mbedtls_net_free(&server_fd);
+    mbedtls_x509_crt_free(&cacert);
+    mbedtls_ssl_free(&ssl);
+    mbedtls_ssl_config_free(&conf);
+    mbedtls_ctr_drbg_free(&ctr_drbg);
+    mbedtls_entropy_free(&entropy);
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    mbedtls_psa_crypto_free();
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
+    /* Shell can not handle large exit numbers -> 1 for errors */
+    if (ret < 0) {
+        ret = 1;
+    }
+
+    mbedtls_exit(ret);
+}
+#endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_PROTO_DTLS && MBEDTLS_NET_C &&
+          MBEDTLS_TIMING_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
+          MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_RSA_C && MBEDTLS_PEM_PARSE_C */