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Make the TOTP face use the filesystem for secret storage (#95)

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* TOTP using filesystem

* Filesystem: ability to read files line by line
This commit is contained in:
James Haggerty
2022-11-01 17:08:05 +11:00
committed by GitHub
parent 54495d2d29
commit b7a461d280
8 changed files with 626 additions and 2 deletions
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39
movement/filesystem.c
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@@ -166,6 +166,29 @@ bool filesystem_read_file(char *filename, char *buf, int32_t length) {
return false;
}
bool filesystem_read_line(char *filename, char *buf, int32_t *offset, int32_t length) {
memset(buf, 0, length + 1);
int32_t file_size = filesystem_get_file_size(filename);
if (file_size > 0) {
int err = lfs_file_open(&lfs, &file, filename, LFS_O_RDONLY);
if (err < 0) return false;
err = lfs_file_seek(&lfs, &file, *offset, LFS_SEEK_SET);
if (err < 0) return false;
err = lfs_file_read(&lfs, &file, buf, min(length - 1, file_size - *offset));
if (err < 0) return false;
for(int i = 0; i < length; i++) {
(*offset)++;
if (buf[i] == '\n') {
buf[i] = 0;
break;
}
}
return lfs_file_close(&lfs, &file) == LFS_ERR_OK;
}
return false;
}
static void filesystem_cat(char *filename) {
info.type = 0;
lfs_stat(&lfs, filename, &info);
@@ -191,6 +214,14 @@ bool filesystem_write_file(char *filename, char *text, int32_t length) {
return lfs_file_close(&lfs, &file) == LFS_ERR_OK;
}
bool filesystem_append_file(char *filename, char *text, int32_t length) {
int err = lfs_file_open(&lfs, &file, filename, LFS_O_WRONLY | LFS_O_CREAT | LFS_O_APPEND);
if (err < 0) return false;
err = lfs_file_write(&lfs, &file, text, length);
if (err < 0) return false;
return lfs_file_close(&lfs, &file) == LFS_ERR_OK;
}
void filesystem_process_command(char *line) {
printf("$ %s", line);
char *command = strtok(line, " \n");
@@ -223,7 +254,7 @@ void filesystem_process_command(char *line) {
memset(text, 0, 248);
size_t pos = 0;
char *word = strtok(NULL, " \n");
while (strcmp(word, ">")) {
while (strcmp(word, ">") && strcmp(word, ">>")) {
sprintf(text + pos, "%s ", word);
pos += strlen(word) + 1;
word = strtok(NULL, " \n");
@@ -235,8 +266,12 @@ void filesystem_process_command(char *line) {
printf("usage: echo text > file\n");
} else if (strchr(filename, '/') || strchr(filename, '\\')) {
printf("subdirectories are not supported\n");
} else {
} else if (!strcmp(word, ">")) {
filesystem_write_file(filename, text, strlen(text));
filesystem_append_file(filename, "\n", 1);
} else if (!strcmp(word, ">>")) {
filesystem_append_file(filename, text, strlen(text));
filesystem_append_file(filename, "\n", 1);
}
free(text);
} else {