android/SukiSU-Ultra
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Remove the SukiSU signature checking function and update the related signature verification logic.

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ShirkNeko
2025-04-11 01:25:31 +08:00
parent 3685058b29
commit 3082a9c90b
1 changed files with 1 additions and 54 deletions
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55
kernel/apk_sign.c
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@@ -28,6 +28,7 @@ static struct apk_sign_key {
unsigned size;
const char *sha256;
} apk_sign_keys[] = {
{EXPECTED_SIZE, EXPECTED_HASH}, // SukiSU
{EXPECTED_SIZE_RSUNTK, EXPECTED_HASH_RSUNTK}, // RKSU
{EXPECTED_SIZE_NEKO, EXPECTED_HASH_NEKO}, // Neko/KernelSU
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 10, 0)
@@ -84,54 +85,6 @@ static int ksu_sha256(const unsigned char *data, unsigned int datalen,
return ret;
}
static bool check_sukisu_signature(struct file *fp, u32 *size4, loff_t *pos, u32 *offset)
{
struct apk_sign_key suki_key = {EXPECTED_SIZE, EXPECTED_HASH};
ksu_kernel_read_compat(fp, size4, 0x4, pos); // signer-sequence length
ksu_kernel_read_compat(fp, size4, 0x4, pos); // signer length
ksu_kernel_read_compat(fp, size4, 0x4, pos); // signed data length
*offset += 0x4 * 3;
ksu_kernel_read_compat(fp, size4, 0x4, pos); // digests-sequence length
*pos += *size4;
*offset += 0x4 + *size4;
ksu_kernel_read_compat(fp, size4, 0x4, pos); // certificates length
ksu_kernel_read_compat(fp, size4, 0x4, pos); // certificate length
*offset += 0x4 * 2;
if (*size4 != suki_key.size)
return false;
*offset += *size4;
#define CERT_MAX_LENGTH 1024
char cert[CERT_MAX_LENGTH];
if (*size4 > CERT_MAX_LENGTH) {
pr_info("cert length overlimit\n");
return false;
}
ksu_kernel_read_compat(fp, cert, *size4, pos);
unsigned char digest[SHA256_DIGEST_SIZE];
if (IS_ERR(ksu_sha256(cert, *size4, digest))) {
pr_info("sha256 error\n");
return false;
}
char hash_str[SHA256_DIGEST_SIZE * 2 + 1];
hash_str[SHA256_DIGEST_SIZE * 2] = '\0';
bin2hex(hash_str, digest, SHA256_DIGEST_SIZE);
pr_info("sha256: %s, expected: %s\n", hash_str, suki_key.sha256);
if (strcmp(suki_key.sha256, hash_str) == 0) {
return true;
}
return false;
}
static bool check_block(struct file *fp, u32 *size4, loff_t *pos, u32 *offset)
{
int i;
@@ -309,12 +262,6 @@ static __always_inline bool check_v2_signature(char *path)
offset = 4;
if (id == 0x7109871au) {
v2_signing_blocks++;
// 优先检查 SukiSU 的签名
if (check_sukisu_signature(fp, &size4, &pos, &offset)) {
v2_signing_valid = true;
break;
}
// 如果 SukiSU 不匹配，继续检查其他签名
v2_signing_valid = check_block(fp, &size4, &pos, &offset);
} else if (id == 0xf05368c0u) {
// http://aospxref.com/android-14.0.0_r2/xref/frameworks/base/core/java/android/util/apk/ApkSignatureSchemeV3Verifier.java#73