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Code Issues Releases Activity

Improve sprintf semantics and usage

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This commit is contained in:
shchmue 2019-05-12 14:05:58 -04:00
parent f73bb0b7b7
commit 83b75af726
2 changed files with 16 additions and 16 deletions
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31
source/keys/keys.c
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@ -55,8 +55,8 @@ emmc_part_t *system_part;
#define TPRINTFARGS(text, args...) \ #define TPRINTFARGS(text, args...) \
end_time = get_tmr_ms(); \ end_time = get_tmr_ms(); \
gfx_printf(text" done @ %d.%03ds\n", args, (end_time - start_time) / 1000, (end_time - start_time) % 1000) gfx_printf(text" done @ %d.%03ds\n", args, (end_time - start_time) / 1000, (end_time - start_time) % 1000)
#define SAVE_KEY(name, src, len) _save_key(name, src, len, text_buffer, &buf_index) #define SAVE_KEY(name, src, len) _save_key(name, src, len, text_buffer)
#define SAVE_KEY_FAMILY(name, src, count, len) _save_key_family(name, src, count, len, text_buffer, &buf_index) #define SAVE_KEY_FAMILY(name, src, count, len) _save_key_family(name, src, count, len, text_buffer)
static u8 temp_key[0x10], static u8 temp_key[0x10],
bis_key[4][0x20] = {0}, bis_key[4][0x20] = {0},
@ -87,8 +87,8 @@ static const u32 colors[6] = {COLOR_RED, COLOR_ORANGE, COLOR_YELLOW, COLOR_GREEN
// key functions // key functions
static bool _key_exists(const void *data) { return memcmp(data, zeros, 0x10); }; static bool _key_exists(const void *data) { return memcmp(data, zeros, 0x10); };
static void _save_key(const char *name, const void *data, const u32 len, char *outbuf, u32 *buf_index); static void _save_key(const char *name, const void *data, const u32 len, char *outbuf);
static void _save_key_family(const char *name, const void *data, const u32 num_keys, const u32 len, char *outbuf, u32 *buf_index); static void _save_key_family(const char *name, const void *data, const u32 num_keys, const u32 len, char *outbuf);
static void _generate_kek(u32 ks, const void *key_source, void *master_key, const void *kek_seed, const void *key_seed); static void _generate_kek(u32 ks, const void *key_source, void *master_key, const void *kek_seed, const void *key_seed);
// nca functions // nca functions
static void *_nca_process(u32 hk_ks1, u32 hk_ks2, FIL *fp, u32 key_offset, u32 len); static void *_nca_process(u32 hk_ks1, u32 hk_ks2, FIL *fp, u32 key_offset, u32 len);
@ -682,8 +682,7 @@ dismount:
} }
key_output: ; key_output: ;
char *text_buffer = (char *)calloc(0x4000, 1); __attribute__ ((aligned (16))) char text_buffer[0x3000] = {0};
u32 buf_index = 0;
SAVE_KEY("aes_kek_generation_source", aes_kek_generation_source, 0x10); SAVE_KEY("aes_kek_generation_source", aes_kek_generation_source, 0x10);
SAVE_KEY("aes_key_generation_source", aes_key_generation_source, 0x10); SAVE_KEY("aes_key_generation_source", aes_key_generation_source, 0x10);
@ -746,12 +745,11 @@ key_output: ;
TPRINTFARGS("\n%kFound %d keys.\n%kLockpick totally", colors[0], _key_count, colors[1]); TPRINTFARGS("\n%kFound %d keys.\n%kLockpick totally", colors[0], _key_count, colors[1]);
f_mkdir("switch"); f_mkdir("switch");
if (!sd_save_to_file(text_buffer, buf_index, "sd:/switch/prod.keys")) if (!sd_save_to_file(text_buffer, strlen(text_buffer), "sd:/switch/prod.keys") && !f_stat("sd:/switch/prod.keys", &fno)) {
gfx_printf("%kWrote %d bytes to /switch/prod.keys\n", colors[2], buf_index); gfx_printf("%kWrote %d bytes to /switch/prod.keys\n", colors[2], (u32)fno.fsize);
else } else
EPRINTF("Failed to save keys to SD."); EPRINTF("Failed to save keys to SD.");
sd_unmount(); sd_unmount();
free(text_buffer);
out_wait: out_wait:
gfx_printf("\n%kVOL + -> Reboot to RCM\n%kVOL - -> Reboot normally\n%kPower -> Power off", colors[3], colors[4], colors[5]); gfx_printf("\n%kVOL + -> Reboot to RCM\n%kVOL - -> Reboot normally\n%kPower -> Power off", colors[3], colors[4], colors[5]);
@ -765,21 +763,22 @@ out_wait:
power_off(); power_off();
} }
static void _save_key(const char *name, const void *data, const u32 len, char *outbuf, u32 *buf_index) { static void _save_key(const char *name, const void *data, const u32 len, char *outbuf) {
if (!_key_exists(data)) if (!_key_exists(data))
return; return;
*buf_index += sprintf(outbuf + *buf_index, "%s = ", name); u32 pos = strlen(outbuf);
pos += sprintf(&outbuf[pos], "%s = ", name);
for (u32 i = 0; i < len; i++) for (u32 i = 0; i < len; i++)
*buf_index += sprintf(outbuf + *buf_index, "%02x", *(u8*)(data + i)); pos += sprintf(&outbuf[pos], "%02x", *(u8*)(data + i));
*buf_index += sprintf(outbuf + *buf_index, "\n"); sprintf(&outbuf[pos], "\n");
_key_count++; _key_count++;
} }
static void _save_key_family(const char *name, const void *data, const u32 num_keys, const u32 len, char *outbuf, u32 *buf_index) { static void _save_key_family(const char *name, const void *data, const u32 num_keys, const u32 len, char *outbuf) {
char temp_name[0x40] = {0}; char temp_name[0x40] = {0};
for (u32 i = 0; i < num_keys; i++) { for (u32 i = 0; i < num_keys; i++) {
sprintf(temp_name, "%s_%02x", name, i); sprintf(temp_name, "%s_%02x", name, i);
_save_key(temp_name, data + i * len, len, outbuf, buf_index); _save_key(temp_name, data + i * len, len, outbuf);
} }
} }

1
source/utils/sprintf.c
View file

@ -116,6 +116,7 @@ u32 sprintf(char *buffer, const char *fmt, ...) {
} }
out: out:
buffer[count] = 0;
va_end(ap); va_end(ap);
return count; return count;
} }