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firmware: fix message processing, typos in recovery

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Jochen Hoenicke 2018-06-18 21:01:54 +01:00 committed by Pavol Rusnak
parent 0148ec6b23
commit c9113fd3f5
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
4 changed files with 15 additions and 9 deletions
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13
firmware/messages.c
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@ -233,7 +233,7 @@ void msg_process(char type, uint16_t msg_id, const pb_field_t *fields, uint8_t *
}
}
void msg_read_common(char type, const uint8_t *buf, int len)
void msg_read_common(char type, const uint8_t *buf, uint32_t len)
{
static char read_state = READSTATE_IDLE;
static CONFIDENTIAL uint8_t msg_in[MSG_IN_SIZE];
@ -271,8 +271,12 @@ void msg_read_common(char type, const uint8_t *buf, int len)
read_state = READSTATE_IDLE;
return;
}
memcpy(msg_in + msg_pos, buf + 1, len - 1);
msg_pos += len - 1;
/* raw data starts at buf + 1 with len - 1 bytes */
buf++;
len = MIN(len - 1, MSG_IN_SIZE - msg_pos);
memcpy(msg_in + msg_pos, buf, len);
msg_pos += len;
}
if (msg_pos >= msg_size) {
@ -329,8 +333,7 @@ void msg_read_tiny(const uint8_t *buf, int len)
}
const pb_field_t *fields = 0;
// upstream nanopb is missing const qualifier, so we have to cast :-/
pb_istream_t stream = pb_istream_from_buffer((uint8_t *)buf + 9, msg_size);
pb_istream_t stream = pb_istream_from_buffer(buf + 9, msg_size);
switch (msg_id) {
case MessageType_MessageType_PinMatrixAck:

3
firmware/messages.h
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@ -42,11 +42,10 @@ const uint8_t *msg_debug_out_data(void);
#endif
void msg_read_common(char type, const uint8_t *buf, int len);
void msg_read_common(char type, const uint8_t *buf, uint32_t len);
bool msg_write_common(char type, uint16_t msg_id, const void *msg_ptr);
void msg_read_tiny(const uint8_t *buf, int len);
void msg_debug_read_tiny(const uint8_t *buf, int len);
extern uint8_t msg_tiny[128];
extern uint16_t msg_tiny_id;

6
firmware/recovery.c
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@ -295,7 +295,7 @@ static void display_choices(bool twoColumn, char choices[9][12], int num)
/* avoid picking out of range numbers */
for (int i = 0; i < displayedChoices; i++) {
if (word_matrix[i] > num)
if (word_matrix[i] >= num)
word_matrix[i] = 0;
}
/* two column layout: middle column = right column */
@ -405,11 +405,13 @@ static void recovery_digit(const char digit) {
/* received final word */
/* Mark the chosen word for 250 ms */
int y = 54 - ((digit - '1')/3)*11;
int y = 54 - ((digit - '1') / 3) * 11;
int x = 64 * (((digit - '1') % 3) > 0);
oledInvert(x + 1, y, x + 62, y + 9);
oledRefresh();
usbTiny(1);
usbSleep(250);
usbTiny(0);
/* index of the chosen word */
int idx = TABLE2(TABLE1(word_pincode / 9) + (word_pincode % 9)) + choice;

2
firmware/storage.c
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@ -565,6 +565,7 @@ bool storage_getRootNode(HDNode *node, const char *curve, bool usePassphrase)
// decrypt hd node
uint8_t secret[64];
PBKDF2_HMAC_SHA512_CTX pctx;
char oldTiny = usbTiny(1);
pbkdf2_hmac_sha512_Init(&pctx, (const uint8_t *)sessionPassphrase, strlen(sessionPassphrase), (const uint8_t *)"TREZORHD", 8);
get_root_node_callback(0, BIP39_PBKDF2_ROUNDS);
for (int i = 0; i < 8; i++) {
@ -572,6 +573,7 @@ bool storage_getRootNode(HDNode *node, const char *curve, bool usePassphrase)
get_root_node_callback((i + 1) * BIP39_PBKDF2_ROUNDS / 8, BIP39_PBKDF2_ROUNDS);
}
pbkdf2_hmac_sha512_Final(&pctx, secret);
usbTiny(oldTiny);
aes_decrypt_ctx ctx;
aes_decrypt_key256(secret, &ctx);
aes_cbc_decrypt(node->chain_code, node->chain_code, 32, secret + 32, &ctx);