add example

main/sshd_task.c

@@ -0,0 +1,113 @@
+#include <esp_littlefs.h>
+#include <libssh/libssh.h>
+#include <libssh/server.h>
+#include <libssh/callbacks.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include <sys/queue.h>
+#include "example.h"
+#include "sshd.h"
+
+#define BASE_PATH "/littlefs"
+#define CERT_KEY_PATH BASE_PATH "/key"
+#define CERT_PUB_PATH BASE_PATH "/key.pub"
+
+#define BUF_SIZE 256
+
+static char key[BUF_SIZE];
+
+static struct ssh_user hardcoded_example_users[] = {
+	{
+		.su_user = "odroid",
+		.su_password = "odroid",
+	},
+	{
+	}
+};
+
+static esp_err_t init_storage()
+{
+	esp_err_t ret;
+	esp_vfs_littlefs_conf_t conf = {
+		.base_path = "/littlefs",
+		.partition_label = "storage",
+		.format_if_mount_failed = true,
+		.dont_mount = false,
+	};
+
+	ret = esp_vfs_littlefs_register(&conf);
+	if (ret != ESP_OK)
+	{
+		return ret;
+	}
+	return ESP_OK;
+}
+
+static esp_err_t load_key_pair(char *path, char* buf, size_t buf_size)
+{
+	FILE *fp;
+	size_t size;
+	fp = fopen(path, "r");
+	esp_err_t ret;
+	if (fp == NULL)
+	{
+		return ESP_FAIL;
+	}
+
+	memset(buf, 0, buf_size);
+
+	fseek(fp, 0, SEEK_END);
+	size = ftell(fp);
+	rewind(fp);
+
+	if (fread(buf, 1, buf_size, fp) == size)
+	{
+		ret = ESP_OK;
+	}
+	else
+	{
+		ret = ESP_FAIL;
+	}
+
+	fclose(fp);
+	return ret;
+}
+
+static struct ssh_user *
+lookup_user(struct server_ctx *sc, const char *user)
+{
+	struct ssh_user *su;
+	for (su = hardcoded_example_users; su->su_user; su++) {
+		if (strcmp(user, su->su_user) == 0)
+			return su;
+	}
+	return NULL;
+
+}
+
+void
+sshd_task(void *arg)
+{
+	struct server_ctx *sc;
+	sc = calloc(1, sizeof(struct server_ctx));
+	if (!sc)
+		return;
+	sc->sc_host_key = key;
+	sc->sc_lookup_user = lookup_user;
+	sc->sc_begin_interactive_session = minicli_begin_interactive_session;
+	sc->sc_auth_methods = SSH_AUTH_METHOD_PASSWORD;
+	sshd_main(sc);
+
+	vTaskDelete(NULL);
+}
+
+void
+start_sshd(void)
+{
+	init_storage();
+	load_key_pair(CERT_KEY_PATH, key, BUF_SIZE);
+
+	puts(key);
+
+	xTaskCreate(sshd_task, "sshd", 32768, NULL, 10, NULL);
+}