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Flasher: factorize and prompt also wehn we can't check the version

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This commit is contained in:
Philippe Teuwen 2022-02-16 03:32:59 +01:00
commit 6ead44933a
1 changed files with 45 additions and 37 deletions
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82
client/src/flash.c
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@ -235,6 +235,34 @@ static int check_segs(flash_file_t *ctx, int can_write_bl, uint32_t flash_size)
return PM3_SUCCESS; return PM3_SUCCESS;
} }
static int ask_confirmation(void) {
PrintAndLogEx(INFO, "Make sure to flash a correct and up-to-date version");
PrintAndLogEx(NORMAL, "Do you want to flash the current image? (yes/no)");
char answer[10];
if ((fgets (answer, sizeof(answer), stdin) == NULL) || (strncmp(answer, "yes", 3) != 0)) {
return PM3_EOPABORTED;
} else {
return PM3_SUCCESS;
}
}
static int print_and_validate_version(struct version_information_t *vi) {
if (vi->magic != VERSION_INFORMATION_MAGIC)
return PM3_EFILE;
char temp[PM3_CMD_DATA_SIZE - 12]; // same limit as for ARM image
FormatVersionInformation(temp, sizeof(temp), "", vi);
PrintAndLogEx(SUCCESS, _CYAN_("ELF file version") _YELLOW_(" %s"), temp);
if (strlen(g_version_information.armsrc) == 9) {
if (strncmp(vi->armsrc, g_version_information.armsrc, 9) != 0) {
PrintAndLogEx(WARNING, _RED_("ARM firmware does not match the source at the time the client was compiled"));
return ask_confirmation();
} else {
return PM3_SUCCESS;
}
}
return PM3_EUNDEF;
}
// Load an ELF file for flashing // Load an ELF file for flashing
int flash_load(flash_file_t *ctx) { int flash_load(flash_file_t *ctx) {
FILE *fd; FILE *fd;
@ -316,53 +344,33 @@ int flash_load(flash_file_t *ctx) {
shdrs = (Elf32_Shdr_t *)(ctx->elf + le32(ehdr->e_shoff)); shdrs = (Elf32_Shdr_t *)(ctx->elf + le32(ehdr->e_shoff));
shstr = ctx->elf + le32(shdrs[ehdr->e_shstrndx].sh_offset); shstr = ctx->elf + le32(shdrs[ehdr->e_shstrndx].sh_offset);
char temp[PM3_CMD_DATA_SIZE - 12]; // same limit as for ARM image
for (uint16_t i = 0; i < le16(ehdr->e_shnum); i++) { for (uint16_t i = 0; i < le16(ehdr->e_shnum); i++) {
if (strcmp(((char *)shstr) + shdrs[i].sh_name, ".version_information") == 0) { if (strcmp(((char *)shstr) + shdrs[i].sh_name, ".version_information") == 0) {
vi = (struct version_information_t *)(ctx->elf + le32(shdrs[i].sh_offset)); vi = (struct version_information_t *)(ctx->elf + le32(shdrs[i].sh_offset));
FormatVersionInformation(temp, sizeof(temp), "", vi); res = print_and_validate_version(vi);
PrintAndLogEx(SUCCESS, _CYAN_("ELF file version") _YELLOW_(" %s"), temp); break;
if (strlen(g_version_information.armsrc) == 9) {
if (strncmp(vi->armsrc, g_version_information.armsrc, 9) != 0) {
PrintAndLogEx(WARNING, _RED_("ARM firmware does not match the source at the time the client was compiled"));
PrintAndLogEx(INFO, "Make sure to flash a correct and up-to-date version");
PrintAndLogEx(NORMAL, "Do you want to flash the current image? (yes/no)");
char answer[10];
if ((fgets (answer, sizeof(answer), stdin) == NULL) || (strncmp(answer, "yes", 3) != 0)) {
res = PM3_EOPABORTED;
goto fail;
}
}
}
} }
if (strcmp(((char *)shstr) + shdrs[i].sh_name, ".bootphase1") == 0) { if (strcmp(((char *)shstr) + shdrs[i].sh_name, ".bootphase1") == 0) {
uint32_t offset = *(uint32_t*)(ctx->elf + le32(shdrs[i].sh_offset) + le32(shdrs[i].sh_size) - 4); uint32_t offset = *(uint32_t*)(ctx->elf + le32(shdrs[i].sh_offset) + le32(shdrs[i].sh_size) - 4);
if (offset < le32(shdrs[i].sh_addr)) if (offset >= le32(shdrs[i].sh_addr)) {
continue; offset -= le32(shdrs[i].sh_addr);
offset -= le32(shdrs[i].sh_addr); if (offset < le32(shdrs[i].sh_size)) {
if (offset >= le32(shdrs[i].sh_size)) vi = (struct version_information_t *)(ctx->elf + le32(shdrs[i].sh_offset) + offset);
continue; res = print_and_validate_version(vi);
vi = (struct version_information_t *)(ctx->elf + le32(shdrs[i].sh_offset) + offset);
if (vi->magic != VERSION_INFORMATION_MAGIC)
continue;
FormatVersionInformation(temp, sizeof(temp), "", vi);
PrintAndLogEx(SUCCESS, _CYAN_("ELF file version") _YELLOW_(" %s"), temp);
if (strlen(g_version_information.armsrc) == 9) {
if (strncmp(vi->armsrc, g_version_information.armsrc, 9) != 0) {
PrintAndLogEx(WARNING, _RED_("ARM firmware does not match the source at the time the client was compiled"));
PrintAndLogEx(INFO, "Make sure to flash a correct and up-to-date version");
PrintAndLogEx(NORMAL, "Do you want to flash the current image? (yes/no)");
char answer[10];
if ((fgets (answer, sizeof(answer), stdin) == NULL) || (strncmp(answer, "yes", 3) != 0)) {
res = PM3_EOPABORTED;
goto fail;
}
} }
} }
break;
} }
} }
return PM3_SUCCESS; if (res == PM3_SUCCESS)
return res;
if (res == PM3_EOPABORTED)
goto fail;
// We could not find proper version_information, so we ask for confirmation
PrintAndLogEx(WARNING, "Unable to check version_information");
res = ask_confirmation();
if (res == PM3_SUCCESS)
return res;
fail: fail:
flash_free(ctx); flash_free(ctx);
return res; return res;