New maxq 1065/1080 LWIP example.

Author: anhu

maxq10xx/README.md

@@ -146,3 +146,12 @@ you fa shizzle!" and then terminate.
 The client will print the message it received from the server along with more
 debug and status logging and then terminate.
 
+## LWIP Example
+
+You will also find `wolfssl-lwip-client.c`.
+
+This example shows how to write a simple TLS client that uses the features
+of the Analog Devices MAXQ1065 and 1080 USS. Note that this is not a
+stand-alone application. This is part of an example that can be found in the
+SDK supplied by Analog Devices.
+

maxq10xx/wolfssl-lwip-client.c

@@ -0,0 +1,318 @@
+/* wolfssl-lwip-client.c
+ *
+ * Based on client-tls-pkcallback.c
+ *
+ * Copyright (C) 2006-2024 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/* This example shows how to write a simple TLS client that uses the features
+ * of the Analog Devices MAXQ1065 and 1080 USS. Note that this is not a
+ * stand-alone application. This is part of an example that can be found in the
+ * SDK supplied by Analog Devices. */
+
+#include "lwip/opt.h"
+
+#if !NO_SYS /* don't build if not configured to run an OS in lwipopts.h */
+
+/***** Includes *****/
+#include <stdio.h>
+
+#include <wolfssl/wolfcrypt/sha256.h>
+#include <wolfssl/wolfcrypt/cryptocb.h>
+#include <wolfssl/wolfcrypt/ecc.h>
+#include <wolfssl/wolfcrypt/rsa.h>
+#include <wolfssl/wolfcrypt/asn.h>
+#include <wolfssl/wolfcrypt/error-crypt.h>
+
+#include "lwip_crypto_libs_app.h"
+#include "crypto_keys.h"
+
+#define TLS12 1
+#define TLS13 2
+
+#define ECC 1
+#define RSA 2
+#define PSK 3
+
+#if defined(TEST_TLS_1_3)
+static int tls_version = TLS13;
+#elif defined(TEST_TLS_1_2)
+static int tls_version = TLS12;
+#else
+#error TEST_TLS_1_3 or TEST_TLS_1_2 MUST be defined in project.mk to test TLS
+#endif
+
+#if defined(TEST_PSK)
+static int alg = PSK;
+#elif defined(TEST_RSA)
+static int alg = RSA;
+#else
+static int alg = ECC;
+#endif
+
+static char *ciphersuite = NULL;
+static const char* kIdentityStr = "Client_identity";
+
+static unsigned int my_psk_client_cb(struct WOLFSSL* ssl, const char* hint,
+                                char* identity, unsigned int id_max_len,
+                                uint8_t* key, unsigned int key_max_len)
+{
+    (void)ssl;
+    (void)hint;
+    (void)key;
+    (void)key_max_len;
+
+    /* see internal.h MAX_PSK_ID_LEN for PSK identity limit */
+    XSTRNCPY(identity, kIdentityStr, id_max_len);
+
+    /* For TLS 1.2, we indicate that MAXQ has the PSK. */
+    return USE_HW_PSK;
+}
+
+#ifdef WOLFSSL_TLS13
+static unsigned int my_psk_client_cs_cb(struct WOLFSSL* ssl, const char* hint,
+                                char* identity, unsigned int id_max_len,
+                                unsigned char* key, unsigned int key_max_len,
+                                const char* ciphersuite)
+{
+    (void)ssl;
+    (void)hint;
+    (void)key;
+    (void)key_max_len;
+
+#ifdef WOLFSSL_PSK_MULTI_ID_PER_CS
+    /* Multiple calls for each cipher suite. First identity byte indicates the
+     * number of identites seen so far for cipher suite. */
+    if (identity[0] != 0) {
+        return 0;
+    }
+#endif  /* WOLFSSL_PSK_MULTI_ID_PER_CS */
+
+    /* see internal.h MAX_PSK_ID_LEN for PSK identity limit */
+    XSTRNCPY(identity, kIdentityStr, id_max_len);
+    XSTRNCAT(identity, ciphersuite + XSTRLEN(ciphersuite) - 6, id_max_len);
+
+    /* For TLS 1.3, we just return an unmodified key. */
+    return 32;
+}
+#endif /* WOLFSSL_TLS13 */
+
+void mxc_wolfssl_create(int sockfd, WOLFSSL **ssl)
+{
+    int ret;
+    int exit_clean = 0;
+
+    /* declare wolfSSL objects */
+    WOLFSSL_CTX* ctx = NULL;
+
+    /*---------------------------------------------------*/
+    /* Start of wolfSSL initialization and configuration */
+    /*---------------------------------------------------*/
+#ifdef DEBUG_WOLFSSL
+    wolfSSL_Debugging_ON();
+#endif
+
+    /* Initialize wolfSSL */
+    if ((ret = wolfSSL_Init()) != WOLFSSL_SUCCESS) {
+        MXC_ERR_MSG("ERROR: Failed to initialize the library\n");
+        exit_clean = 1;
+        goto exit;
+    }
+
+    /* Create and initialize WOLFSSL_CTX */
+#ifdef WOLFSSL_TLS13
+    if (tls_version == TLS13) {
+        MXC_DEBUG_MSG_GRN("TLS v1.3\n");
+        ctx = wolfSSL_CTX_new(wolfTLSv1_3_client_method());
+    } else
+#endif /* WOLFSSL_TLS13 */
+    {
+        MXC_DEBUG_MSG_GRN("TLS v1.2\n");
+        ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method());
+    }
+
+    if (ctx == NULL) {
+        MXC_ERR_MSG("ERROR: failed to create WOLFSSL_CTX\n");
+        ret = -1;
+        exit_clean = 1;
+        goto exit;
+    }
+
+    /* At this point you would normally register a CA certificate, however, it
+     * resides in MAXQ10xx and has already been registered. */
+#ifndef NO_FILESYSTEM
+    /* Load the dummy private key; actually a public key. The actual private
+     * key resides in MAXQ 10xx. */
+    if (key_file != NULL) {
+        if ((ret = wolfSSL_CTX_use_PrivateKey_file(ctx, key_file,
+                            WOLFSSL_FILETYPE_PEM)) != WOLFSSL_SUCCESS) {
+            MXC_ERR_MSG("ERROR: failed to load %s, please check the "
+                    "file.\n", key_file);
+            exit_clean = 1;
+            goto exit;
+        }
+    }
+#else
+
+#if defined (TEST_RSA)
+ret = wolfSSL_CTX_use_PrivateKey_buffer(ctx, rsa_key_der_2048,
+            sizeof(rsa_key_der_2048), WOLFSSL_FILETYPE_ASN1);
+#elif defined (HAVE_ECC)
+    ret = wolfSSL_CTX_use_PrivateKey_buffer(ctx, ecc_key_der_256,
+            sizeof(ecc_key_der_256), WOLFSSL_FILETYPE_ASN1);
+#else
+    ret = wolfSSL_CTX_use_PrivateKey_buffer(srv_ctx, server_key_der_2048,
+            sizeof_server_key_der_2048, WOLFSSL_FILETYPE_ASN1);
+#endif
+
+    if (ret != WOLFSSL_SUCCESS) {
+        MXC_DEBUG_MSG("error loading private key\n");
+        goto exit;
+    }
+#endif
+    /* If specified, set the ciphersuite. */
+    if (ciphersuite != NULL) {
+        if (wolfSSL_CTX_set_cipher_list(ctx, ciphersuite) != WOLFSSL_SUCCESS) {
+            MXC_ERR_MSG("Invalid cipher suite.\n");
+            exit_clean = 1;
+            goto exit;
+        }
+    }
+#ifndef NO_PSK
+    if (alg == PSK) {
+        wolfSSL_CTX_set_psk_client_callback(ctx, my_psk_client_cb);
+#ifdef WOLFSSL_TLS13
+        if (tls_version == TLS13) {
+            wolfSSL_CTX_set_psk_client_cs_callback(ctx, my_psk_client_cs_cb);
+        }
+#endif /* WOLFSSL_TLS13 */
+
+        if (ciphersuite != NULL) {
+            wolfSSL_CTX_set_psk_callback_ctx(ctx, (void*)ciphersuite);
+        }
+    }
+#endif
+    /* Validate peer certificate */
+    wolfSSL_CTX_set_verify(ctx, WOLFSSL_VERIFY_PEER, NULL);
+
+    /* Create a WOLFSSL object */
+    if ((*ssl = wolfSSL_new(ctx)) == NULL) {
+        MXC_ERR_MSG("ERROR: failed to create WOLFSSL object\n");
+        ret = -1;
+        exit_clean = 1;
+        goto exit;
+    }
+exit:
+    /* Cleanup and return */
+    if (ctx != NULL)
+        wolfSSL_CTX_free(ctx);
+    if (exit_clean)
+        mxc_wolfssl_close(sockfd, *ssl);
+}
+
+void mxc_wolfssl_connect(int sockfd, WOLFSSL *ssl)
+{
+    int ret, err;
+    int exit_clean = 0;
+
+#ifdef WOLFSSL_TLS13
+    if (alg == RSA) {
+        if (wolfSSL_UseKeyShare(ssl, WOLFSSL_FFDHE_2048) != WOLFSSL_SUCCESS) {
+            MXC_ERR_MSG("ERROR: failed to create WOLFSSL object\n");
+            ret = -1;
+            exit_clean = 1;
+            goto exit;
+        }
+    }
+#endif /* WOLFSSL_TLS13 */
+    //MXC_DEBUG_MSG("mxc_wolfssl_connect->wolfSSL_set_fd\n");
+    /* Attach wolfSSL to the socket */
+    if ((ret = wolfSSL_set_fd(ssl, sockfd)) != WOLFSSL_SUCCESS) {
+        MXC_ERR_MSG("ERROR: Failed to set the file descriptor\n");
+        exit_clean = 1;
+        goto exit;
+    }
+
+    wolfSSL_SSLSetIORecv(ssl, mxc_wolfssl_receive);
+    wolfSSL_SSLSetIOSend(ssl, mxc_wolfssl_send);
+
+    //MXC_DEBUG_MSG("mxc_wolfssl_connect->wolfSSL_connect\n");
+    /* Connect to wolfSSL on the server side */
+    do {
+        ret = wolfSSL_connect(ssl);
+        err = wolfSSL_get_error(ssl, ret);
+    } while (err == WC_PENDING_E);
+    if (ret != WOLFSSL_SUCCESS) {
+        MXC_ERR_MSG("ERROR: failed to connect to wolfSSL\n");
+        exit_clean = 1;
+        goto exit;
+    }
+
+    MXC_DEBUG_MSG_GRN("\nmxc_wolfssl_connect-> Done\n\n");
+
+exit:
+    if (exit_clean)
+        mxc_wolfssl_close(sockfd, ssl);
+}
+
+void mxc_wolfssl_write(WOLFSSL* ssl, const void* data, int sz)
+{
+    int ret;
+
+    MXC_DEBUG_MSG(". mxc_wolfssl_write...\n");
+
+    /* Send the message to the server */
+    if ((ret = wolfSSL_write(ssl, data, sz)) != sz) {
+        MXC_ERR_MSG("ERROR: failed to write entire message\n");
+        MXC_ERR_MSG("%d bytes of %d bytes were sent", ret, sz);
+    }
+}
+
+int mxc_wolfssl_read(WOLFSSL* ssl)
+{
+    int ret;
+    char buff[SOCKET_BUF_SIZE];
+
+    /* Read the server data into our buff array */
+    memset(buff, 0, sizeof(buff));
+    if ((ret = wolfSSL_read(ssl, buff, sizeof(buff)-1)) == -1) {
+        MXC_ERR_MSG("ERROR: failed to read\n");
+    }
+
+    /* Print to stdout any data the server sends */
+    MXC_DEBUG_MSG("Server: %s\n", buff);
+    return ret;
+    // ret = 0; /* success */
+}
+
+void mxc_wolfssl_close(int sockfd, WOLFSSL* ssl)
+{
+    unsigned char lBuff[SOCKET_BUF_SIZE];
+    /* Cleanup and return */
+    if (ssl != NULL)
+        wolfSSL_free(ssl);
+
+    wolfSSL_Cleanup();
+
+    if (sockfd >= 0)
+        lwip_close(sockfd);
+    while(lwip_read(sockfd,lBuff, SOCKET_BUF_SIZE) > 0);
+}
+
+#endif /* !NO_SYS */