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-rw-r--r--nvme-rpmb.c1057
1 files changed, 1057 insertions, 0 deletions
diff --git a/nvme-rpmb.c b/nvme-rpmb.c
new file mode 100644
index 0000000..345e6ea
--- /dev/null
+++ b/nvme-rpmb.c
@@ -0,0 +1,1057 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Micron Technology Inc. All rights reserved.
+ *
+ * This program 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.
+ *
+ * This program 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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * nvme-rpmb.c - Implementation of NVMe RPMB support commands in Nvme
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <linux/if_alg.h>
+#include <linux/socket.h>
+#include <limits.h>
+
+#include "common.h"
+#include "nvme.h"
+#include "libnvme.h"
+#include "nvme-print.h"
+
+#define CREATE_CMD
+
+
+#ifndef AF_ALG
+#define AF_ALG 38
+#endif
+#ifndef SOL_ALG
+#define SOL_ALG 279
+#endif
+
+#define HMAC_SHA256_ALGO_NAME "hmac(sha256)"
+#define MD5_HASH_ALGO_NAME "md5"
+#define HMAC_SHA256_HASH_SIZE 32
+#define MD5_HASH_HASH_SIZE 16
+
+/*
+ * Utility function to create hash value of given data (with given key) using
+ * given hash algorithm; this function uses kernel crypto services
+ */
+unsigned char *create_hash(const char *algo,
+ int hash_size,
+ unsigned char *data,
+ int datalen,
+ unsigned char *key,
+ int keylen)
+{
+ int error, infd, outfd = -1;
+ unsigned char *hash = NULL;
+ struct sockaddr_alg provider_sa = {
+ .salg_family = AF_ALG,
+ .salg_type = "hash",
+ .salg_name = { 0 }
+ };
+
+ /* copy algorithm name */
+ if (strlen(algo) > sizeof(provider_sa.salg_name)) {
+ fprintf(stderr, "%s: algorithm name overflow", __func__);
+ return hash;
+ }
+ memcpy(provider_sa.salg_name, algo, strlen(algo));
+
+ /* open netlink socket connection to algorigm provider and bind */
+ infd = socket(AF_ALG, SOCK_SEQPACKET, 0);
+ if (infd < 0) {
+ perror("socket");
+ return hash;
+ }
+ error = bind(infd, (struct sockaddr *)&provider_sa, sizeof(provider_sa));
+ if (error < 0) {
+ perror("bind");
+ goto out_close_infd;
+ }
+
+ /* if algorithm requires key, set it first - empty keys not accepted !*/
+ if (key != NULL && keylen > 0) {
+ error = setsockopt(infd, SOL_ALG, ALG_SET_KEY, key, keylen);
+ if (error < 0) {
+ perror("setsockopt");
+ goto out_close_infd;
+ }
+ }
+
+ /* now send data to hash */
+ outfd = accept(infd, NULL, 0);
+ if (outfd < 0) {
+ perror("accept");
+ goto out_close_infd;
+ }
+ error = send(outfd, data, datalen, 0);
+ if (error < 0) {
+ perror("send");
+ goto out_close_outfd;
+ }
+
+ /* read computed hash */
+ hash = (unsigned char *)calloc(hash_size, 1);
+ if (hash == NULL) {
+ perror("calloc");
+ goto out_close_outfd;
+ }
+
+ error = read(outfd, hash, hash_size);
+ if (error != hash_size) {
+ perror("read");
+ free(hash);
+ hash = NULL;
+ }
+out_close_outfd:
+ close(outfd);
+out_close_infd:
+ close(infd);
+
+ return hash;
+}
+
+/* Function that computes hmac-sha256 hash of given data and key pair. Returns
+ * byte stream (non-null terminated) upon success, NULL otherwise.
+ */
+unsigned char *
+hmac_sha256(unsigned char *data, int datalen, unsigned char *key, int keylen)
+{
+ return create_hash(HMAC_SHA256_ALGO_NAME,
+ HMAC_SHA256_HASH_SIZE,
+ data,
+ datalen,
+ key,
+ keylen);
+}
+
+/* Function that computes md5 of given buffer - md5 hash is used as nonce
+ * Returns byte stream (non-null terminated) upon success, NULL otherwise.
+ */
+unsigned char *
+rpmb_md5(unsigned char *data, int datalen)
+{
+ return create_hash(MD5_HASH_ALGO_NAME,
+ MD5_HASH_HASH_SIZE,
+ data,
+ datalen,
+ NULL,
+ 0);
+}
+
+/* Read data from given file into buffer and return its length */
+static int read_file(const char *file, unsigned char **data, unsigned int *len)
+{
+ struct stat sb;
+ size_t size;
+ unsigned char *buf = NULL;
+ int fd;
+ int err = -EINVAL;
+
+ if (file == NULL) return err;
+
+ if ((fd = open(file, O_RDONLY)) < 0) {
+ fprintf(stderr, "Failed to open %s: %s\n", file, strerror(errno));
+ return fd;
+ }
+
+ err = fstat(fd, &sb);
+ if (err < 0) {
+ perror("fstat");
+ goto out;
+ }
+
+ size = sb.st_size;
+ if (posix_memalign((void **)&buf, getpagesize(), size)) {
+ fprintf(stderr, "No memory for reading file :%s\n", file);
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = read(fd, buf, size);
+ if (err < 0) {
+ err = -errno;
+ fprintf(stderr, "Failed to read data from file"
+ " %s with %s\n", file, strerror(errno));
+ free(buf);
+ goto out;
+ }
+ *data = buf;
+ *len = err;
+ err = 0;
+out:
+ close(fd);
+ return err;
+}
+
+/* Write given buffer data to specified file */
+static void write_file(unsigned char *data, size_t len, const char *dir,
+ const char *file, const char *msg)
+{
+ char temp_folder[PATH_MAX] = { 0 };
+ FILE *fp = NULL;
+
+ if (dir != NULL)
+ sprintf(temp_folder, "%s/%s", dir, file);
+ else
+ sprintf(temp_folder, "./%s", file);
+
+ if ((fp = fopen(temp_folder, "ab+")) != NULL) {
+ if (fwrite(data, 1, len, fp) != len) {
+ fprintf(stderr, "Failed to write %s data to %s\n",
+ msg ? msg : "", temp_folder);
+ }
+ fclose(fp);
+ } else {
+ fprintf(stderr, "Failed to open %s file to write %s\n",
+ temp_folder, msg ? msg : "");
+ }
+}
+
+/* Various definitions used in RPMB related support */
+enum rpmb_request_type {
+ RPMB_REQ_AUTH_KEY_PROGRAM = 0x0001,
+ RPMB_REQ_READ_WRITE_CNTR = 0x0002,
+ RPMB_REQ_AUTH_DATA_WRITE = 0x0003,
+ RPMB_REQ_AUTH_DATA_READ = 0x0004,
+ RPMB_REQ_READ_RESULT = 0x0005,
+ RPMB_REQ_AUTH_DCB_WRITE = 0x0006,
+ RPMB_REQ_AUTH_DCB_READ = 0x0007
+};
+
+enum rpmb_response_type {
+ RPMB_RSP_AUTH_KEY_PROGRAM = (RPMB_REQ_AUTH_KEY_PROGRAM << 8),
+ RPMB_RSP_READ_WRITE_CNTR = (RPMB_REQ_READ_WRITE_CNTR << 8),
+ RPMB_RSP_AUTH_DATA_WRITE = (RPMB_REQ_AUTH_DATA_WRITE << 8),
+ RPMB_RSP_AUTH_DATA_READ = (RPMB_REQ_AUTH_DATA_READ << 8),
+ RPMB_RSP_READ_RESULT = (RPMB_REQ_READ_RESULT << 8),
+ RPMB_RSP_AUTH_DCB_WRITE = (RPMB_REQ_AUTH_DCB_WRITE << 8),
+ RPMB_RSP_AUTH_DCB_READ = (RPMB_REQ_AUTH_DCB_READ << 8)
+};
+
+/* RPMB data frame structure */
+#pragma pack(1)
+struct rpmb_data_frame_t {
+ unsigned char pad[191];
+ unsigned char mac[32];
+ unsigned char target; /* 0-6, should match with NSSF with SS, SR */
+ unsigned char nonce[16];
+ unsigned int write_counter;
+ unsigned int address;
+ unsigned int sectors;
+ unsigned short result;
+ unsigned short type; /* req or response */
+ unsigned char data[0]; /* in sector count times */
+};
+#pragma pack()
+
+struct rpmb_config_block_t {
+ unsigned char bp_enable;
+ unsigned char bp_lock;
+ unsigned char rsvd[510];
+};
+
+#define RPMB_DATA_FRAME_SIZE 256
+#define RPMB_NVME_SECP 0xEA
+#define RPMB_NVME_SPSP 0x0001
+
+static int send_rpmb_req(int fd, unsigned char tgt, int size,
+ struct rpmb_data_frame_t *req)
+{
+ struct nvme_security_send_args args = {
+ .args_size = sizeof(args),
+ .fd = fd,
+ .nsid = 0,
+ .nssf = tgt,
+ .spsp0 = RPMB_NVME_SPSP,
+ .spsp1 = 0,
+ .secp = RPMB_NVME_SECP,
+ .tl = 0,
+ .data_len = size,
+ .data = (void *)req,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ return nvme_security_send(&args);
+}
+
+static int recv_rpmb_rsp(int fd, int tgt, int size,
+ struct rpmb_data_frame_t *rsp)
+{
+
+ struct nvme_security_receive_args args = {
+ .args_size = sizeof(args),
+ .fd = fd,
+ .nsid = 0,
+ .nssf = tgt,
+ .spsp0 = RPMB_NVME_SPSP,
+ .spsp1 = 0,
+ .secp = RPMB_NVME_SECP,
+ .al = 0,
+ .data_len = size,
+ .data = (void *)rsp,
+ .timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+ .result = NULL,
+ };
+
+ return nvme_security_receive(&args);
+}
+
+/* Initialize nonce value in rpmb request frame */
+static void rpmb_nonce_init(struct rpmb_data_frame_t *req)
+{
+ int num = rand();
+ unsigned char *hash = rpmb_md5((unsigned char *)&num, sizeof(num));
+ if (hash) memcpy(req->nonce, hash, sizeof(req->nonce));
+}
+
+/* Read key from a given key buffer or key file */
+static unsigned char *read_rpmb_key(char *keystr, char *keyfile, unsigned int *keysize)
+{
+ unsigned char *keybuf = NULL;
+ int err;
+
+ if (keystr == NULL) {
+ if (keyfile != NULL) {
+ err = read_file(keyfile, &keybuf, keysize);
+ if (err < 0)
+ return NULL;
+ }
+ } else if ((keybuf = (unsigned char *)malloc(strlen(keystr))) != NULL) {
+ *keysize = strlen(keystr);
+ memcpy(keybuf, keystr, *keysize);
+ }
+
+ return keybuf;
+}
+
+/* Initialize RPMB request frame with given values */
+static struct rpmb_data_frame_t *
+rpmb_request_init(unsigned int req_size,
+ unsigned short type,
+ unsigned char target,
+ unsigned char nonce,
+ unsigned int addr,
+ unsigned int sectors,
+ unsigned char *data,
+ unsigned short data_offset,
+ unsigned int data_size)
+{
+ struct rpmb_data_frame_t *req = NULL;
+
+ if ((req = (struct rpmb_data_frame_t *)calloc(req_size, 1)) == NULL) {
+ fprintf(stderr, "Memory allocation failed for request 0x%04x\n",
+ type);
+ return req;
+ }
+
+ req->type = type;
+ req->target = target;
+ req->address = addr;
+ req->sectors = sectors;
+
+ if (nonce) rpmb_nonce_init(req);
+ if (data) memcpy((unsigned char *)req + data_offset, data, data_size);
+
+ return req;
+}
+
+/* Process rpmb response and print appropriate error message */
+static int check_rpmb_response( struct rpmb_data_frame_t *req,
+ struct rpmb_data_frame_t *rsp,
+ char *msg)
+{
+ const char *rpmb_result_string [] = {
+ "Operation successful",
+ "General failure",
+ "Authentication (MAC) failure",
+ "Counter failure (not matching/incrementing failure)",
+ "Address failure (out of range or wrong alignment)",
+ "Write (data/counter/result) failure",
+ "Read (data/counter/result) failure",
+ "Authentication key not yet programmed",
+ "Invalid device configuration block",
+ "Unknown error"
+ };
+
+ /* check error status before comparing nonce and mac */
+ if (rsp->result != 0) {
+ if (rsp->type != ((req->type << 8) & 0xFF00)) {
+ fprintf(stderr, "%s ! non-matching response 0x%04x for"
+ " 0x%04x\n", msg, rsp->type, req->type);
+ } else if ((rsp->result & 0x80) == 0x80) {
+ fprintf(stderr, "%s ! Expired write-counter !\n", msg);
+ } else if (rsp->result) {
+ fprintf(stderr, "%s ! %s\n", msg,
+ rpmb_result_string[rsp->result & 0x7F]);
+ } else if (memcmp(req->nonce, rsp->nonce, 16)) {
+ fprintf(stderr, "%s ! non-matching nonce\n", msg);
+ } else if (memcmp(req->mac, rsp->mac, 32)) {
+ fprintf(stderr, "%s ! non-matching MAC\n", msg);
+ } else if ((req->write_counter + 1) != rsp->write_counter) {
+ fprintf(stderr, "%s ! out-of-sync write-counters\n", msg);
+ }
+ }
+
+ return (int)(rsp->result);
+}
+
+/* send an initialized rpmb request to the controller and read its response
+ * expected response size give in 'rsp_size'. returns response buffer upon
+ * successful completion (caller must free), NULL otherwise
+ */
+static struct rpmb_data_frame_t *
+rpmb_read_request(int fd,
+ struct rpmb_data_frame_t *req,
+ int req_size,
+ int rsp_size)
+{
+ struct rpmb_data_frame_t *rsp = NULL;
+ unsigned char msg[1024] = { 0 };
+ int error;
+
+ sprintf((char *)msg, "RPMB request 0x%04x to target 0x%x",
+ req->type, req->target);
+
+ error = send_rpmb_req(fd, req->target, req_size, req);
+ if (error != 0) {
+ fprintf(stderr, "%s failed with error = 0x%x\n",
+ msg, error);
+ goto error_out;
+ }
+
+ /* read the result back */
+ rsp = (struct rpmb_data_frame_t *)calloc(rsp_size, 1);
+ if (rsp == NULL) {
+ fprintf(stderr, "memory alloc failed for %s\n", msg);
+ goto error_out;
+ }
+
+ /* Read result of previous request */
+ error = recv_rpmb_rsp(fd, req->target, rsp_size, rsp);
+ if (error) {
+ fprintf(stderr, "error 0x%x receiving response for %s\n",
+ error, msg);
+ goto error_out;
+ }
+
+ /* validate response buffer - match target, nonce, and mac */
+ error = check_rpmb_response(req, rsp, (char *)msg);
+ if (error == 0) return rsp;
+
+error_out:
+ free(rsp);
+ return NULL;
+}
+
+/* read current write counter value from controller */
+static int rpmb_read_write_counter(int fd,
+ unsigned char target,
+ unsigned int *counter)
+{
+ int error = -1;
+ int req_size = sizeof(struct rpmb_data_frame_t);
+ struct rpmb_data_frame_t *req = NULL;
+ struct rpmb_data_frame_t *rsp = NULL;
+
+ req = rpmb_request_init(req_size, RPMB_REQ_READ_WRITE_CNTR,
+ target, 1, 0, 0, NULL, 0, 0);
+ if (req == NULL) goto out;
+ if ((rsp = rpmb_read_request(fd, req, req_size, req_size)) == NULL) {
+ goto out;
+ }
+ *counter = rsp->write_counter;
+ error = 0;
+
+out:
+ free(req);
+ free(rsp);
+ return error;
+}
+
+/* Read current device configuration block into specified buffer. It also returns
+ * current write counter value returned as part of response, in case of error it
+ * returns 0
+ */
+static unsigned int rpmb_read_config_block(int fd, unsigned char **config_buf)
+{
+ int req_size = sizeof(struct rpmb_data_frame_t);
+ int cfg_size = sizeof(struct rpmb_config_block_t);
+ int rsp_size = req_size + cfg_size;
+
+ struct rpmb_data_frame_t *req = NULL;
+ struct rpmb_data_frame_t *rsp = NULL;
+ struct rpmb_config_block_t *cfg = NULL;
+ unsigned int retval = 0;
+
+ /* initialize request with nonce, no data on input */
+ req = rpmb_request_init(req_size, RPMB_REQ_AUTH_DCB_READ, 0, 1, 0, 1,
+ 0, 0, 0);
+ if (!req)
+ return 0;
+ if ((rsp = rpmb_read_request(fd, req, req_size, rsp_size)) == NULL)
+ {
+ free(req);
+ return 0;
+ }
+
+ /* copy configuration data to be sent back to caller */
+ cfg = (struct rpmb_config_block_t *)calloc(cfg_size, 1);
+ if (cfg == NULL) {
+ fprintf(stderr, "failed to allocate RPMB config buffer\n");
+ goto out;
+ }
+
+ memcpy(cfg, rsp->data, cfg_size);
+ *config_buf = (unsigned char *)cfg;
+ cfg = NULL;
+ retval = rsp->write_counter;
+out:
+ free(req);
+ free(rsp);
+ return retval;
+}
+
+
+static int rpmb_auth_data_read(int fd, unsigned char target,
+ unsigned int offset,
+ unsigned char **msg_buf,
+ int msg_size, int acc_size)
+{
+ struct rpmb_data_frame_t *req = NULL;
+ struct rpmb_data_frame_t *rsp = NULL;
+ int req_size = sizeof(struct rpmb_data_frame_t);
+ int chunk_size = (acc_size < msg_size) ? acc_size : msg_size;
+ int xfer = chunk_size;
+ unsigned char *bufp = (unsigned char *)malloc(msg_size * 512);
+ unsigned char *tbufp = bufp;
+ int data_size, rsp_size;
+ int error = -1;
+
+ if (bufp == NULL) {
+ fprintf(stderr, "Failed to allocated memory for read-data req\n");
+ goto out;
+ }
+
+ while (xfer > 0) {
+ rsp_size = req_size + xfer * 512;
+ req = rpmb_request_init(req_size, RPMB_REQ_AUTH_DATA_READ,
+ target, 1, offset, xfer, 0, 0, 0);
+ if (req == NULL)
+ break;
+ if ((rsp = rpmb_read_request(fd, req, req_size, rsp_size)) == NULL)
+ {
+ fprintf(stderr, "read_request failed\n");
+ free(req);
+ break;
+ }
+
+ data_size = rsp->sectors * 512;
+ memcpy(tbufp, rsp->data, data_size);
+ offset += rsp->sectors;
+ tbufp += data_size;
+ if (offset + chunk_size > msg_size)
+ xfer = msg_size - offset;
+ else
+ xfer = chunk_size;
+ free(req);
+ free(rsp);
+ }
+
+ *msg_buf = bufp;
+ error = offset;
+out:
+ return error;
+}
+
+/* Implementation of programming authentication key to given RPMB target */
+static int rpmb_program_auth_key(int fd, unsigned char target,
+ unsigned char *key_buf, int key_size)
+{
+ int req_size = sizeof(struct rpmb_data_frame_t);
+ int rsp_size = sizeof(struct rpmb_data_frame_t);
+
+ struct rpmb_data_frame_t *req = NULL;
+ struct rpmb_data_frame_t *rsp = NULL;
+
+ int err = -ENOMEM;
+
+ req = rpmb_request_init(req_size, RPMB_REQ_AUTH_KEY_PROGRAM, target,
+ 0, 0, 0, key_buf, (223 - key_size), key_size);
+ if (req == NULL) {
+ fprintf(stderr, "failed to allocate request buffer memory\n");
+ goto out;
+ }
+
+ /* send request and read the result first */
+ rsp = rpmb_read_request(fd, req, req_size, rsp_size);
+ if (rsp == NULL || rsp->result != 0) {
+ goto out;
+ }
+
+ /* reuse response buffer */
+ memset(rsp, 0, rsp_size);
+ err = recv_rpmb_rsp(fd, req->target, rsp_size, rsp);
+ if (err != 0) {
+ err = check_rpmb_response(req, rsp, "Failed to Program Key");
+ }
+out:
+ free(req);
+ free(rsp);
+
+ return err;
+}
+
+
+/* Implementation of RPMB authenticated data write command; this function
+ * transfers msg_size bytes from msg_buf to controller 'addr'. Returns
+ * number of bytes actually written to, otherwise negetive error code
+ * on failures.
+ */
+static int auth_data_write_chunk(int fd, unsigned char tgt, unsigned int addr,
+ unsigned char *msg_buf, int msg_size,
+ unsigned char *keybuf, int keysize)
+{
+ int req_size = sizeof(struct rpmb_data_frame_t) + msg_size;
+ int rsp_size = sizeof(struct rpmb_data_frame_t);
+
+ struct rpmb_data_frame_t *req = NULL;
+ struct rpmb_data_frame_t *rsp = NULL;
+
+ unsigned int write_cntr = 0;
+ unsigned char *mac = NULL;
+ int error = -ENOMEM;
+
+ /* get current write counter and copy to the request */
+ error = rpmb_read_write_counter(fd, tgt, &write_cntr);
+ if (error != 0) {
+ fprintf(stderr, "Failed to read write counter for write-data\n");
+ goto out;
+ }
+
+ req = rpmb_request_init(req_size, RPMB_REQ_AUTH_DATA_WRITE, tgt, 0,
+ addr, (msg_size / 512), msg_buf,
+ offsetof(struct rpmb_data_frame_t, data), msg_size);
+ if (req == NULL) {
+ fprintf(stderr, "Memory alloc failed for write-data command\n");
+ goto out;
+ }
+
+ req->write_counter = write_cntr;
+
+ /* compute HMAC hash */
+ mac = hmac_sha256(((unsigned char *)req + 223), req_size - 223,
+ keybuf, keysize);
+ if (mac == NULL) {
+ fprintf(stderr, "failed to compute HMAC-SHA256\n");
+ error = -1;
+ goto out;
+ }
+
+ memcpy(req->mac, mac, 32);
+
+ /* send the request and get response */
+ error = send_rpmb_req(fd, tgt, req_size, req);
+ if (error != 0) {
+ fprintf(stderr, "RPMB request 0x%04x for 0x%x, error: %d\n",
+ req->type, tgt, error);
+ goto out;
+ }
+
+ /* send the request to get the result and then request to get the response */
+ rsp = (struct rpmb_data_frame_t *)calloc(rsp_size, 1);
+ rsp->target = req->target;
+ rsp->type = RPMB_REQ_READ_RESULT;
+ error = send_rpmb_req(fd, tgt, rsp_size, rsp);
+ if (error != 0 || rsp->result != 0) {
+ fprintf(stderr, "Write-data read result 0x%x, error = 0x%x\n",
+ rsp->result, error);
+ goto out;
+ }
+
+ /* Read final response */
+ memset(rsp, 0, rsp_size);
+ error = recv_rpmb_rsp(fd, tgt, rsp_size, rsp);
+ if (error != 0)
+ fprintf(stderr, "Auth data write recv error = 0x%x\n", error);
+ else
+ error = check_rpmb_response(req, rsp, "Failed to write-data");
+out:
+ free(req);
+ free(rsp);
+ free(mac);
+
+ return error;
+}
+
+/* send the request and get response */
+static int rpmb_auth_data_write(int fd, unsigned char target,
+ unsigned int addr, int acc_size,
+ unsigned char *msg_buf, int msg_size,
+ unsigned char *keybuf, int keysize)
+{
+ int chunk_size = acc_size < msg_size ? acc_size : msg_size;
+ int xfer = chunk_size;
+ int offset = 0;
+
+ while (xfer > 0 ) {
+ if (auth_data_write_chunk(fd, target, (addr + offset / 512),
+ msg_buf + offset, xfer,
+ keybuf, keysize) != 0)
+ {
+ /* error writing chunk data */
+ break;
+ }
+
+ offset += xfer;
+ if (offset + chunk_size > msg_size)
+ xfer = msg_size - offset;
+ else
+ xfer = chunk_size;
+ }
+
+ return offset;
+}
+
+/* writes given config_block buffer to the drive target 0 */
+static int rpmb_write_config_block(int fd, unsigned char *cfg_buf,
+ unsigned char *keybuf, int keysize)
+{
+ int cfg_size = sizeof(struct rpmb_config_block_t);
+ int rsp_size = sizeof(struct rpmb_data_frame_t);
+ int req_size = rsp_size + cfg_size;
+
+ struct rpmb_data_frame_t *req = NULL;
+ struct rpmb_data_frame_t *rsp = NULL;
+ unsigned char *cfg_buf_read = NULL, *mac = NULL;
+ unsigned int write_cntr = 0;
+ int error = -ENOMEM;
+
+ /* initialize request */
+ req = rpmb_request_init(req_size, RPMB_REQ_AUTH_DCB_WRITE, 0, 0, 0, 1,
+ cfg_buf, offsetof(struct rpmb_data_frame_t, data),
+ cfg_size);
+ if (req == NULL) {
+ fprintf(stderr, "failed to allocate rpmb request buffer\n");
+ goto out;
+ }
+
+ /* read config block write_counter from controller */
+ write_cntr = rpmb_read_config_block(fd, &cfg_buf_read);
+ if (cfg_buf_read == NULL) {
+ fprintf(stderr, "failed to read config block write counter\n");
+ error = -EIO;
+ goto out;
+ }
+
+ free(cfg_buf_read);
+ req->write_counter = write_cntr;
+ mac = hmac_sha256(((unsigned char *)req + 223), req_size - 223,
+ keybuf, keysize);
+ if (mac == NULL) {
+ fprintf(stderr, "failed to compute hmac-sha256 hash\n");
+ error = -EINVAL;
+ goto out;
+ }
+
+ memcpy(req->mac, mac, sizeof(req->mac));
+
+ error = send_rpmb_req(fd, 0, req_size, req);
+ if (error != 0) {
+ fprintf(stderr, "Write-config RPMB request, error = 0x%x\n",
+ error);
+ goto out;
+ }
+
+ /* get response */
+ rsp = (struct rpmb_data_frame_t *)calloc(rsp_size, 1);
+ if (rsp == NULL) {
+ fprintf(stderr, "failed to allocate response buffer memory\n");
+ error = -ENOMEM;
+ goto out;
+ }
+
+ /* get result first */
+ memset(rsp, 0, rsp_size);
+ rsp->target = req->target;
+ rsp->type = RPMB_REQ_READ_RESULT;
+ /* get the response and validate */
+ error = recv_rpmb_rsp(fd, req->target, rsp_size, rsp);
+ if (error != 0) {
+ fprintf(stderr,"Failed getting write-config response\
+ error = 0x%x\n", error);
+ goto out;
+ }
+ error = check_rpmb_response(req, rsp,
+ "Failed to retrieve write-config response");
+out:
+ free(req);
+ free(rsp);
+ free(mac);
+
+ return error;
+}
+
+static bool invalid_xfer_size(int blocks, unsigned int bpsz)
+{
+ return ((blocks <= 0) ||
+ (blocks * 512) > ((bpsz + 1) * 128 * 1024));
+}
+
+/* Handling rpmb sub-command */
+int rpmb_cmd_option(int argc, char **argv, struct command *cmd, struct plugin *plugin)
+{
+ const char *desc = "Run RPMB command on the supporting controller";
+ const char *msg = "data to be written on write-data or write-config commands";
+ const char *mfile = "data file for read/write-data, read/write-config options";
+ const char *kfile = "key file that has authentication key to be used";
+ const char *target = "RPMB target - numerical value of 0 to 6, default 0";
+ const char *address = "Sector offset to read from or write to for an RPMB target, default 0";
+ const char *blocks = "Number of 512 blocks to read or write";
+ const char *key = "key to be used for authentication";
+ const char *opt = "RPMB action - info, program-key, read-counter, write-data, " \
+ "read-data, write-config and read-config";
+
+ struct config {
+ char *cmd;
+ char *key;
+ char *msg;
+ char *keyfile;
+ char *msgfile;
+ int opt;
+ int address;
+ int blocks;
+ char target;
+ };
+
+ struct config cfg = {
+ .cmd = "info",
+ .key = NULL,
+ .msg = NULL,
+ .msgfile = NULL,
+ .keyfile = NULL,
+ .opt = 0,
+ .address = 0,
+ .blocks = 0,
+ .target = 0,
+ };
+
+ OPT_ARGS(opts) = {
+ OPT_STRING("cmd", 'c', "command", &cfg.cmd, opt),
+ OPT_STRING("msgfile", 'f', "FILE", &cfg.msgfile, mfile),
+ OPT_STRING("keyfile", 'g', "FILE", &cfg.keyfile, kfile),
+ OPT_STRING("key", 'k', "key", &cfg.key, key),
+ OPT_STRING("msg", 'd', "data", &cfg.msg, msg),
+ OPT_UINT("address", 'o', &cfg.address, address),
+ OPT_UINT("blocks", 'b', &cfg.blocks, blocks),
+ OPT_UINT("target", 't', &cfg.target, target),
+ OPT_END()
+ };
+
+ unsigned int write_cntr = 0;
+ unsigned char *key_buf = NULL;
+ unsigned char *msg_buf = NULL;
+ unsigned int msg_size = 0;
+ unsigned int key_size = 0;
+ struct nvme_id_ctrl ctrl;
+ struct nvme_dev *dev;
+ int err = -1;
+
+ union ctrl_rpmbs_reg {
+ struct {
+ unsigned int num_targets:3;
+ unsigned int auth_method:3;
+ unsigned int reserved:10;
+ unsigned int total_size:8; /* 128K units */
+ unsigned int access_size:8; /* in 512 byte count */
+ };
+ unsigned int rpmbs;
+ } regs;
+
+ if ((err = parse_and_open(&dev, argc, argv, desc, opts)))
+ return err;
+
+ /* before parsing commands, check if controller supports any RPMB targets */
+ err = nvme_identify_ctrl(dev_fd(dev), &ctrl);
+ if (err)
+ goto out;
+
+ regs.rpmbs = le32_to_cpu(ctrl.rpmbs);
+ if (regs.num_targets == 0) {
+ fprintf(stderr, "No RPMB targets are supported by the drive\n");
+ goto out;
+ }
+
+ /* parse and validate options; default print rpmb support info */
+ if (cfg.cmd == 0 || strcmp(cfg.cmd, "info") == 0) {
+ nvme_show_id_ctrl_rpmbs(regs.rpmbs, 0);
+ goto out;
+ }
+
+ if (strcmp(cfg.cmd, "program-key") == 0)
+ cfg.opt = RPMB_REQ_AUTH_KEY_PROGRAM;
+ else if (strcmp(cfg.cmd, "read-counter") == 0)
+ cfg.opt = RPMB_REQ_READ_WRITE_CNTR;
+ else if (strcmp(cfg.cmd, "write-data") == 0)
+ cfg.opt = RPMB_REQ_AUTH_DATA_WRITE;
+ else if (strcmp(cfg.cmd, "read-data") == 0)
+ cfg.opt = RPMB_REQ_AUTH_DATA_READ;
+ else if (strcmp(cfg.cmd, "write-config") == 0)
+ cfg.opt = RPMB_REQ_AUTH_DCB_WRITE;
+ else if (strcmp(cfg.cmd, "read-config") == 0)
+ cfg.opt = RPMB_REQ_AUTH_DCB_READ;
+ else {
+ fprintf(stderr, "Invalid option %s for rpmb command\n", cfg.cmd);
+ goto out;
+ }
+
+ /* input file/data processing */
+ if (cfg.opt == RPMB_REQ_AUTH_DCB_WRITE ||
+ cfg.opt == RPMB_REQ_AUTH_DATA_WRITE ||
+ cfg.opt == RPMB_REQ_AUTH_KEY_PROGRAM)
+ {
+ key_buf = read_rpmb_key(cfg.key, cfg.keyfile, &key_size);
+ if (key_buf == NULL) {
+ fprintf(stderr, "Failed to read key\n");
+ goto out;
+ }
+
+ if (key_size > 223 || key_size <= 0) {
+ fprintf(stderr, "Invalid key size %d, valid input 1 to 223\n",
+ key_size);
+ goto out;
+ }
+
+ if (cfg.opt == RPMB_REQ_AUTH_DCB_WRITE ||
+ cfg.opt == RPMB_REQ_AUTH_DATA_WRITE) {
+ if (cfg.msg != NULL) {
+ msg_size = strlen(cfg.msg);
+ msg_buf = (unsigned char *)malloc(msg_size);
+ memcpy(msg_buf, cfg.msg, msg_size);
+ } else {
+ err = read_file(cfg.msgfile, &msg_buf, &msg_size);
+ if (err || msg_size <= 0) {
+ fprintf(stderr, "Failed to read file %s\n",
+ cfg.msgfile);
+ goto out;
+ }
+ }
+ }
+ }
+
+ switch (cfg.opt) {
+ case RPMB_REQ_READ_WRITE_CNTR:
+ err = rpmb_read_write_counter(dev_fd(dev), cfg.target,
+ &write_cntr);
+ if (err == 0)
+ printf("Write Counter is: %u\n", write_cntr);
+ break;
+
+ case RPMB_REQ_AUTH_DCB_READ:
+ write_cntr = rpmb_read_config_block(dev_fd(dev),
+ &msg_buf);
+ if (msg_buf == NULL) {
+ fprintf(stderr, "failed read config blk\n");
+ goto out;
+ }
+
+ /* no output file is given, print the data on stdout */
+ if (cfg.msgfile == 0) {
+ struct rpmb_config_block_t *cfg =
+ (struct rpmb_config_block_t *)msg_buf;
+ printf("Boot Partition Protection is %s\n",
+ ((cfg->bp_enable & 0x1) ? "Enabled" : "Disabled"));
+ printf("Boot Partition 1 is %s\n",
+ ((cfg->bp_lock & 0x2) ? "Locked" : "Unlocked"));
+ printf("Boot Partition 0 is %s\n",
+ ((cfg->bp_lock & 0x1) ? "Locked" : "Unlocked"));
+ } else {
+ printf("Saving received config data to %s file\n", cfg.msgfile);
+ write_file(msg_buf, sizeof(struct rpmb_config_block_t), NULL,
+ cfg.msgfile, NULL);
+ }
+ err = (write_cntr == 0);
+ break;
+
+ case RPMB_REQ_AUTH_DATA_READ:
+ /* check if requested data is beyond what target supports */
+ msg_size = cfg.blocks * 512;
+ if (invalid_xfer_size(cfg.blocks, regs.total_size)) {
+ fprintf(stderr, "invalid transfer size %d \n",
+ msg_size);
+ break;
+ }
+ err = rpmb_auth_data_read(dev_fd(dev), cfg.target,
+ cfg.address, &msg_buf,
+ cfg.blocks,
+ (regs.access_size + 1));
+ if (err > 0 && msg_buf != NULL) {
+ printf("Writing %d bytes to file %s\n",
+ err * 512, cfg.msgfile);
+ write_file(msg_buf, err * 512, NULL,
+ cfg.msgfile, NULL);
+ }
+ break;
+
+ case RPMB_REQ_AUTH_DATA_WRITE:
+ if (invalid_xfer_size(cfg.blocks, regs.total_size) ||
+ (cfg.blocks * 512) > msg_size) {
+ fprintf(stderr, "invalid transfer size %d\n",
+ cfg.blocks * 512);
+ break;
+ } else if ((cfg.blocks * 512) < msg_size) {
+ msg_size = cfg.blocks * 512;
+ }
+ err = rpmb_auth_data_write(dev_fd(dev), cfg.target,
+ cfg.address,
+ ((regs.access_size + 1) * 512),
+ msg_buf, msg_size,
+ key_buf, key_size);
+
+ /* print whatever extent of data written to target */
+ printf("Written %d sectors out of %d @target(%d):0x%x\n",
+ err/512, msg_size/512, cfg.target, cfg.address);
+ break;
+
+ case RPMB_REQ_AUTH_DCB_WRITE:
+ err = rpmb_write_config_block(dev_fd(dev), msg_buf,
+ key_buf, key_size);
+ break;
+
+ case RPMB_REQ_AUTH_KEY_PROGRAM:
+ err = rpmb_program_auth_key(dev_fd(dev), cfg.target,
+ key_buf, key_size);
+ break;
+ default:
+ break;
+ }
+
+out:
+ /* release memory */
+ free(key_buf);
+ free(msg_buf);
+
+ /* close device */
+ dev_close(dev);
+
+ return err;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 16:01:32 +0000