Restructure native codebase

native/jni/boot/pattern.cpp

@@ -0,0 +1,64 @@
+#include <base.hpp>
+
+#include "magiskboot.hpp"
+
+#define MATCH(p) else if (strncmp(s + skip, p, sizeof(p) - 1) == 0) skip += (sizeof(p) - 1)
+
+static int skip_verity_pattern(const char *s) {
+    int skip = s[0] == ',';
+
+    if (0) {}
+    MATCH("verifyatboot");
+    MATCH("verify");
+    MATCH("avb_keys");
+    MATCH("avb");
+    MATCH("support_scfs");
+    MATCH("fsverity");
+    else return -1;
+
+    if (s[skip] == '=') {
+        while (!strchr(" \n,", s[skip]))
+            ++skip;
+    }
+    return skip;
+}
+
+static int skip_encryption_pattern(const char *s) {
+    int skip = s[0] == ',';
+
+    if (0) {}
+    MATCH("forceencrypt");
+    MATCH("forcefdeorfbe");
+    MATCH("fileencryption");
+    else return -1;
+
+    if (s[skip] == '=') {
+        while (!strchr(" \n,", s[skip]))
+            ++skip;
+    }
+    return skip;
+}
+
+static uint32_t remove_pattern(char *src, uint32_t size, int(*pattern_skip)(const char *)) {
+    int orig_sz = size;
+    int write = 0;
+    for (int read = 0; read < orig_sz;) {
+        if (int skip = pattern_skip(src + read); skip > 0) {
+            fprintf(stderr, "Remove pattern [%.*s]\n", skip, src + read);
+            size -= skip;
+            read += skip;
+        } else {
+            src[write++] = src[read++];
+        }
+    }
+    memset(src + write, 0, orig_sz - write);
+    return size;
+}
+
+uint32_t patch_verity(void *buf, uint32_t size) {
+    return remove_pattern(static_cast<char *>(buf), size, skip_verity_pattern);
+}
+
+uint32_t patch_encryption(void *buf, uint32_t size) {
+    return remove_pattern(static_cast<char *>(buf), size, skip_encryption_pattern);
+}