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-rw-r--r--util/ldid.cpp243
1 files changed, 217 insertions, 26 deletions
diff --git a/util/ldid.cpp b/util/ldid.cpp
index b1c114a8c..7c225e1e9 100644
--- a/util/ldid.cpp
+++ b/util/ldid.cpp
@@ -38,10 +38,14 @@
#include "minimal/stdlib.h"
#include "minimal/mapping.h"
+#include "sha1.h"
+
#include <cstring>
#include <string>
#include <vector>
+#include <sys/wait.h>
+
struct fat_header {
uint32_t magic;
uint32_t nfat_arch;
@@ -68,12 +72,12 @@ struct mach_header {
uint32_t flags;
};
-#define MH_MAGIC 0xfeedface
+#define MH_MAGIC 0xfeedface
#define MH_CIGAM 0xcefaedfe
-#define MH_EXECUTE 0x2
-#define MH_DYLIB 0x6
-#define MH_BUNDLE 0x8
+#define MH_EXECUTE 0x2
+#define MH_DYLIB 0x6
+#define MH_BUNDLE 0x8
struct load_command {
uint32_t cmd;
@@ -82,9 +86,10 @@ struct load_command {
#define LC_REQ_DYLD 0x80000000
-#define LC_LOAD_DYLIB 0x0c
-#define LC_ID_DYLIB 0x0d
-#define LC_UUID 0x1b
+#define LC_LOAD_DYLIB 0x0c
+#define LC_ID_DYLIB 0x0d
+#define LC_UUID 0x1b
+#define LC_CODE_SIGNATURE 0x1d
#define LC_REEXPORT_DYLIB (0x1f | LC_REQ_DYLD)
struct dylib {
@@ -106,6 +111,51 @@ struct uuid_command {
uint8_t uuid[16];
};
+struct linkedit_data_command {
+ uint32_t cmd;
+ uint32_t cmdsize;
+ uint32_t dataoff;
+ uint32_t datasize;
+};
+
+uint16_t Swap_(uint16_t value) {
+ return
+ ((value >> 8) & 0x00ff) |
+ ((value << 8) & 0xff00);
+}
+
+uint32_t Swap_(uint32_t value) {
+ value = ((value >> 8) & 0x00ff00ff) |
+ ((value << 8) & 0xff00ff00);
+ value = ((value >> 16) & 0x0000ffff) |
+ ((value << 16) & 0xffff0000);
+ return value;
+}
+
+int16_t Swap_(int16_t value) {
+ return Swap_(static_cast<uint16_t>(value));
+}
+
+int32_t Swap_(int32_t value) {
+ return Swap_(static_cast<uint32_t>(value));
+}
+
+uint16_t Swap(uint16_t value) {
+ return true ? Swap_(value) : value;
+}
+
+uint32_t Swap(uint32_t value) {
+ return true ? Swap_(value) : value;
+}
+
+int16_t Swap(int16_t value) {
+ return Swap(static_cast<uint16_t>(value));
+}
+
+int32_t Swap(int32_t value) {
+ return Swap(static_cast<uint32_t>(value));
+}
+
class Framework {
private:
void *base_;
@@ -114,30 +164,20 @@ class Framework {
bool swapped_;
public:
- int16_t Swap(int16_t value) const {
- return Swap(static_cast<uint16_t>(value));
+ uint16_t Swap(uint16_t value) const {
+ return swapped_ ? Swap_(value) : value;
}
- int32_t Swap(int32_t value) const {
- return Swap(static_cast<uint32_t>(value));
+ uint32_t Swap(uint32_t value) const {
+ return swapped_ ? Swap_(value) : value;
}
- uint16_t Swap(uint16_t value) const {
- return !swapped_ ? value :
- ((value >> 8) & 0x00ff) |
- ((value << 8) & 0xff00);
+ int16_t Swap(int16_t value) const {
+ return Swap(static_cast<uint16_t>(value));
}
- uint32_t Swap(uint32_t value) const {
- if (!swapped_)
- return value;
- else {
- value = ((value >> 8) & 0x00ff00ff) |
- ((value << 8) & 0xff00ff00);
- value = ((value >> 16) & 0x0000ffff) |
- ((value << 16) & 0xffff0000);
- return value;
- }
+ int32_t Swap(int32_t value) const {
+ return Swap(static_cast<uint32_t>(value));
}
Framework(const char *framework_path) :
@@ -198,8 +238,50 @@ class Framework {
}
};
+#define CSMAGIC_CODEDIRECTORY 0xfade0c02
+#define CSMAGIC_EMBEDDED_SIGNATURE 0xfade0cc0
+#define CSSLOT_CODEDIRECTORY 0
+
+struct BlobIndex {
+ uint32_t type;
+ uint32_t offset;
+};
+
+struct SuperBlob {
+ uint32_t magic;
+ uint32_t length;
+ uint32_t count;
+ struct BlobIndex index[];
+};
+
+struct CodeDirectory {
+ uint32_t magic;
+ uint32_t length;
+ uint32_t version;
+ uint32_t flags;
+ uint32_t hashOffset;
+ uint32_t identOffset;
+ uint32_t nSpecialSlots;
+ uint32_t nCodeSlots;
+ uint32_t codeLimit;
+ uint8_t hashSize;
+ uint8_t hashType;
+ uint8_t spare1;
+ uint8_t pageSize;
+ uint32_t spare2;
+};
+
extern "C" uint32_t hash(uint8_t *k, uint32_t length, uint32_t initval);
+#define CODESIGN_ALLOCATE "arm-apple-darwin9-codesign_allocate"
+
+void sha1(uint8_t *hash, uint8_t *data, size_t size) {
+ SHA1Context context;
+ SHA1Reset(&context);
+ SHA1Input(&context, data, size);
+ SHA1Result(&context, hash);
+}
+
int main(int argc, const char *argv[]) {
bool flag_R(false);
bool flag_t(false);
@@ -207,6 +289,7 @@ int main(int argc, const char *argv[]) {
bool flag_u(false);
bool flag_T(false);
+ bool flag_S(false);
bool timeh(false);
uint32_t timev(0);
@@ -222,6 +305,7 @@ int main(int argc, const char *argv[]) {
case 't': flag_t = true; break;
case 'u': flag_u = true; break;
case 'p': flag_p = true; break;
+ case 'S': flag_S = true; break;
case 'T': {
flag_T = true;
@@ -245,7 +329,46 @@ int main(int argc, const char *argv[]) {
size_t filei(0), filee(0);
_foreach (file, files) try {
- Framework framework(file->c_str());
+ const char *path(file->c_str());
+ const char *base = strrchr(path, '/');
+ char *temp(NULL), *dir;
+
+ if (base != NULL)
+ dir = strndup(path, base++ - path + 1);
+ else {
+ dir = strdup("");
+ base = path;
+ }
+
+ if (flag_S) {
+ asprintf(&temp, "%s.%s.cs", dir, base);
+ const char *allocate = getenv("CODESIGN_ALLOCATE");
+ if (allocate == NULL)
+ allocate = "codesign_allocate";
+
+ size_t size; {
+ Framework framework(path);
+ size = framework.GetSize();
+ }
+
+ pid_t pid = fork();
+ _syscall(pid);
+ if (pid == 0) {
+ char *ssize;
+ asprintf(&ssize, "%u", (sizeof(struct SuperBlob) + sizeof(struct BlobIndex) + sizeof(struct CodeDirectory) + strlen(base) + 1 + (size + 0x1000 - 1) / 0x1000 * 0x14 + 15) / 16 * 16);
+ printf("%s\n", ssize);
+ execlp(allocate, allocate, "-i", path, "-a", "arm", ssize, "-o", temp, NULL);
+ _assert(false);
+ }
+
+ int status;
+ _syscall(waitpid(pid, &status, 0));
+ _assert(WIFEXITED(status));
+ _assert(WEXITSTATUS(status) == 0);
+ }
+
+ Framework framework(temp == NULL ? path : temp);
+ struct linkedit_data_command *signature(NULL);
if (flag_p)
printf("path%zu='%s'\n", filei, file->c_str());
@@ -255,6 +378,8 @@ int main(int argc, const char *argv[]) {
if (flag_R && cmd == LC_REEXPORT_DYLIB)
(*load_command)->cmd = framework.Swap(LC_LOAD_DYLIB);
+ else if (cmd == LC_CODE_SIGNATURE)
+ signature = reinterpret_cast<struct linkedit_data_command *>(*load_command);
else if (cmd == LC_UUID) {
volatile struct uuid_command *uuid_command(reinterpret_cast<struct uuid_command *>(*load_command));
@@ -287,6 +412,72 @@ int main(int argc, const char *argv[]) {
}
}
+ if (flag_S) {
+ _assert(signature != NULL);
+
+ uint32_t data = framework.Swap(signature->dataoff);
+ uint32_t size = framework.Swap(signature->datasize);
+
+ uint8_t *top = reinterpret_cast<uint8_t *>(framework.GetBase());
+ uint8_t *blob = top + data;
+ struct SuperBlob *super = reinterpret_cast<struct SuperBlob *>(blob);
+ super->magic = Swap(CSMAGIC_EMBEDDED_SIGNATURE);
+
+ uint32_t count = 1;
+ uint32_t offset = sizeof(struct SuperBlob) + count * sizeof(struct BlobIndex);
+
+ super->index[0].type = Swap(CSSLOT_CODEDIRECTORY);
+ super->index[0].offset = Swap(offset);
+
+ uint32_t begin = offset;
+ struct CodeDirectory *directory = reinterpret_cast<struct CodeDirectory *>(blob + begin);
+ offset += sizeof(struct CodeDirectory);
+
+ directory->magic = Swap(CSMAGIC_CODEDIRECTORY);
+ directory->version = Swap(0x00020001);
+ directory->flags = Swap(0);
+ directory->codeLimit = Swap(data);
+ directory->hashSize = 0x14;
+ directory->hashType = 0x01;
+ directory->spare1 = 0x00;
+ directory->pageSize = 0x0c;
+ directory->spare2 = Swap(0);
+
+ directory->identOffset = Swap(offset - begin);
+ strcpy(reinterpret_cast<char *>(blob + offset), base);
+ offset += strlen(base) + 1;
+
+ uint8_t (*hashes)[20] = reinterpret_cast<uint8_t (*)[20]>(blob + offset);
+ uint32_t special = 0;
+
+ uint32_t pages = (data + 0x1000 - 1) / 0x1000;
+ directory->nSpecialSlots = Swap(special);
+ directory->nCodeSlots = Swap(pages);
+
+ if (pages != 1)
+ for (size_t i = 0; i != pages - 1; ++i)
+ sha1(hashes[special + i], top + 0x1000 * i, 0x1000);
+ if (pages != 0)
+ sha1(hashes[special + pages - 1], top + 0x1000 * (pages - 1), data % 0x1000);
+
+ directory->hashOffset = Swap(offset - begin);
+ offset += sizeof(*hashes) * (special + pages);
+ directory->length = Swap(offset - begin);
+
+ super->count = Swap(count);
+ super->length = Swap(offset);
+
+ _assert(offset < size);
+ memset(blob + offset, 0, size - offset);
+ }
+
+ if (temp) {
+ _syscall(unlink(path));
+ _syscall(rename(temp, path));
+ free(temp);
+ }
+
+ free(dir);
++filei;
} catch (const char *) {
++filee;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-14 01:44:54 +0000