Magisk/native/jni/magiskboot/format.c

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#include <string.h>
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#include "format.h"
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#define MATCH(s) (len >= (sizeof(s) - 1) && memcmp(buf, s, sizeof(s) - 1) == 0)
format_t check_fmt(const void *buf, size_t len) {
if (MATCH(CHROMEOS_MAGIC)) {
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return CHROMEOS;
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} else if (MATCH(BOOT_MAGIC)) {
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return AOSP;
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} else if (MATCH(ELF32_MAGIC)) {
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return ELF32;
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} else if (MATCH(ELF64_MAGIC)) {
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return ELF64;
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} else if (MATCH(GZIP_MAGIC)) {
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return GZIP;
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} else if (MATCH(LZOP_MAGIC)) {
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return LZOP;
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} else if (MATCH(XZ_MAGIC)) {
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return XZ;
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} else if (len >= 13 && memcmp(buf, "\x5d\x00\x00", 3) == 0
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&& (((char *)buf)[12] == '\xff' || ((char *)buf)[12] == '\x00')) {
return LZMA;
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} else if (MATCH(BZIP_MAGIC)) {
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return BZIP2;
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} else if (MATCH(LZ4_MAGIC)) {
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return LZ4;
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} else if (MATCH(LZ4_LEG_MAGIC)) {
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return LZ4_LEGACY;
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} else if (MATCH(MTK_MAGIC)) {
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return MTK;
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} else if (MATCH(DTB_MAGIC)) {
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return DTB;
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} else if (MATCH(DHTB_MAGIC)) {
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return DHTB;
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} else if (MATCH(TEGRABLOB_MAGIC)) {
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return BLOB;
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} else {
return UNKNOWN;
}
}
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void get_fmt_name(format_t fmt, char *name) {
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char *s;
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switch (fmt) {
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case CHROMEOS:
s = "chromeos";
break;
case AOSP:
s = "aosp";
break;
case GZIP:
s = "gzip";
break;
case LZOP:
s = "lzop";
break;
case XZ:
s = "xz";
break;
case LZMA:
s = "lzma";
break;
case BZIP2:
s = "bzip2";
break;
case LZ4:
s = "lz4";
break;
case LZ4_LEGACY:
s = "lz4_legacy";
break;
case MTK:
s = "mtk";
break;
case DTB:
s = "dtb";
break;
default:
s = "raw";
}
strcpy(name, s);
}