1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* mgmt-cli.c
* ---------
* Management CLI code.
*
* Copyright (c) 2016-2017, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the NORDUnet nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <string.h>
/* Rename both CMSIS HAL_OK and libhal HAL_OK to disambiguate */
#define HAL_OK CMSIS_HAL_OK
#include "stm-init.h"
#include "stm-uart.h"
#include "stm-led.h"
#include "task.h"
#include "mgmt-cli.h"
#include "mgmt-firmware.h"
#include "mgmt-bootloader.h"
#include "mgmt-fpga.h"
#include "mgmt-misc.h"
#include "mgmt-keystore.h"
#include "mgmt-masterkey.h"
#include "mgmt-task.h"
#include "mgmt-keywrap.h"
#undef HAL_OK
#define HAL_OK LIBHAL_OK
#include "hal.h"
#warning Refactor so we do not need to include hal_internal.h here
#include "hal_internal.h"
#undef HAL_OK
static tcb_t *cli_task;
#ifndef CLI_UART_RECVBUF_SIZE
#define CLI_UART_RECVBUF_SIZE 256
#endif
typedef struct {
unsigned ridx;
unsigned widx;
mgmt_cli_dma_state_t rx_state;
uint8_t buf[CLI_UART_RECVBUF_SIZE];
} ringbuf_t;
inline void ringbuf_init(ringbuf_t *rb)
{
memset(rb, 0, sizeof(*rb));
}
/* return number of characters read */
inline int ringbuf_read_char(ringbuf_t *rb, uint8_t *c)
{
if (rb->ridx != rb->widx) {
*c = rb->buf[rb->ridx];
if (++rb->ridx >= sizeof(rb->buf))
rb->ridx = 0;
return 1;
}
return 0;
}
inline void ringbuf_write_char(ringbuf_t *rb, uint8_t c)
{
rb->buf[rb->widx] = c;
if (++rb->widx >= sizeof(rb->buf))
rb->widx = 0;
}
static ringbuf_t uart_ringbuf;
/* current character received from UART */
static uint8_t uart_rx;
/* Callback for HAL_UART_Receive_DMA().
*/
void HAL_UART1_RxCpltCallback(UART_HandleTypeDef *huart)
{
huart = huart;
ringbuf_write_char(&uart_ringbuf, uart_rx);
task_wake(cli_task);
}
static void uart_cli_print(struct cli_def *cli __attribute__ ((unused)), const char *buf)
{
char crlf[] = "\r\n";
uart_send_string(buf);
uart_send_string(crlf);
}
static ssize_t uart_cli_read(struct cli_def *cli __attribute__ ((unused)), void *buf, size_t count)
{
for (size_t i = 0; i < count; ++i) {
while (ringbuf_read_char(&uart_ringbuf, (uint8_t *)(buf + i)) == 0)
task_sleep();
}
return (ssize_t)count;
}
static ssize_t uart_cli_write(struct cli_def *cli __attribute__ ((unused)), const void *buf, size_t count)
{
uart_send_bytes((uint8_t *) buf, count);
return (ssize_t)count;
}
int control_mgmt_uart_dma_rx(mgmt_cli_dma_state_t state)
{
if (state == DMA_RX_START) {
if (uart_ringbuf.rx_state != DMA_RX_START) {
ringbuf_init(&uart_ringbuf);
HAL_UART_Receive_DMA(&huart_mgmt, &uart_rx, 1);
uart_ringbuf.rx_state = DMA_RX_START;
}
return 1;
} else if (state == DMA_RX_STOP) {
if (HAL_UART_DMAStop(&huart_mgmt) != CMSIS_HAL_OK) return 0;
uart_ringbuf.rx_state = DMA_RX_STOP;
return 1;
}
return 0;
}
hal_user_t user;
static int check_auth(const char *username, const char *password)
{
hal_client_handle_t client = { -1 };
/* PIN-based login */
if (strcmp(username, "wheel") == 0)
user = HAL_USER_WHEEL;
else if (strcmp(username, "so") == 0)
user = HAL_USER_SO;
else if (strcmp(username, "user") == 0)
user = HAL_USER_NORMAL;
else
user = HAL_USER_NONE;
if (hal_rpc_login(client, user, password, strlen(password)) == LIBHAL_OK)
return CLI_OK;
user = HAL_USER_NONE;
return CLI_ERROR;
}
int cli_main(void)
{
cli_task = task_get_tcb();
struct cli_def *cli;
cli = cli_init();
if (cli == NULL)
Error_Handler();
cli_read_callback(cli, uart_cli_read);
cli_write_callback(cli, uart_cli_write);
cli_print_callback(cli, uart_cli_print);
cli_set_banner(cli, "Cryptech Alpha");
cli_set_hostname(cli, "cryptech");
cli_set_auth_callback(cli, check_auth);
/* we don't have any privileged commands at the moment */
cli_unregister_command(cli, "enable");
configure_cli_fpga(cli);
configure_cli_keystore(cli);
configure_cli_masterkey(cli);
configure_cli_firmware(cli);
configure_cli_bootloader(cli);
configure_cli_misc(cli);
configure_cli_task(cli);
configure_cli_keywrap(cli);
while (1) {
control_mgmt_uart_dma_rx(DMA_RX_START);
cli_loop(cli, 0);
/* cli_loop returns when the user enters 'quit' or 'exit' */
cli_print(cli, "\nLogging out...\n");
user = HAL_USER_NONE;
}
/*NOTREACHED*/
return -1;
}
|
