From 5bb30c6397b736671a04857ac4e95a3e53a3ce25 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Thu, 22 Sep 2016 13:39:33 +0200
Subject: Add support for ICE16 baseband firmware files (iPhone 7/7+)

While not tested, the new Mav16 baseband firmware files should
also work with this update.
---
 src/mbn.c     | 11 +++++++++++
 src/mbn.h     | 22 ++++++++++++++++++++++
 src/restore.c |  9 ++++++++-
 3 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/mbn.c b/src/mbn.c
index a4f514e..101e29f 100644
--- a/src/mbn.c
+++ b/src/mbn.c
@@ -44,6 +44,17 @@ mbn_file* mbn_parse(unsigned char* data, unsigned int size)
 		mbn->version = 1;
 		memcpy(&mbn->header.v1, data, sizeof(mbn_header_v1));
 		mbn->parsed_size = mbn->header.v1.data_size + sizeof(mbn_header_v1);
+	} else if (memcmp(data, BIN_MAGIC, BIN_MAGIC_SIZE) == 0) {
+		mbn->version = 3;
+		memcpy(&mbn->header.bin, data, sizeof(bin_header));
+		mbn->parsed_size = mbn->header.bin.total_size;
+	} else if (memcmp(data, ELF_MAGIC, ELF_MAGIC_SIZE) == 0) {
+		mbn->version = 4;
+		memcpy(&mbn->header.elf, data, sizeof(elf_header));
+		// we cheat here since we don't parse the actual ELF file
+		mbn->parsed_size = mbn->size;
+	} else {
+		debug("DEBUG: Unknown file format passed to %s\n", __func__);
 	}
 	if (mbn->parsed_size != mbn->size) {
 		info("WARNING: size mismatch when parsing MBN file. Continuing anyway.\n");
diff --git a/src/mbn.h b/src/mbn.h
index f8f138d..008ba61 100644
--- a/src/mbn.h
+++ b/src/mbn.h
@@ -66,11 +66,33 @@ struct _mbn_header_v2 {
 } __attribute__((packed));
 typedef struct _mbn_header_v2 mbn_header_v2;
 
+#define BIN_MAGIC "\x7D\x04\x00\xEA\x6C\x69\x48\x55"
+#define BIN_MAGIC_SIZE 8
+
+struct _bin_header {
+	unsigned char magic[8];
+	uint32_t unk_0x08;
+	uint32_t version;
+	uint32_t total_size; // size including header
+	uint32_t unk_0x14; // some offset
+} __attribute__((packed));
+typedef struct _bin_header bin_header;
+
+#define ELF_MAGIC "\x7F\x45\x4C\x46\x01\x01\x01\x00" // ELF magic, 32bit, little endian, SYSV
+#define ELF_MAGIC_SIZE 8
+
+struct _elf_header {
+	unsigned char magic[8];
+} __attribute__((packed));
+typedef struct _elf_header elf_header;
+
 typedef struct {
 	uint32_t version;
 	union {
 		mbn_header_v1 v1;
 		mbn_header_v2 v2;
+		bin_header bin;
+		elf_header elf;
 	} header;
 	uint32_t parsed_size;
 	uint32_t parsed_sig_offset;
diff --git a/src/restore.c b/src/restore.c
index fd7be92..e9813f2 100644
--- a/src/restore.c
+++ b/src/restore.c
@@ -1102,6 +1102,9 @@ static const char* restore_get_bbfw_fn_for_element(const char* elem)
 		// Mav5 firmware files
 		{ "RestoreSBL1", "restoresbl1.mbn" },
 		{ "SBL1", "sbl1.mbn" },
+		// ICE16 firmware files
+		{ "RestorePSI", "restorepsi.bin", },
+		{ "PSI", "psi_ram.bin" },
 		{ NULL, NULL }
 	};
 
@@ -1171,6 +1174,10 @@ static int restore_sign_bbfw(const char* bbfwtmp, plist_t bbtss, const unsigned
 		if (node && (strcmp(key + (strlen(key) - 5), "-Blob") == 0) && (plist_get_node_type(node) == PLIST_DATA)) {
 			key[strlen(key)-5] = 0;
 			const char* signfn = restore_get_bbfw_fn_for_element(key);
+			if (!signfn) {
+				error("ERROR: can't match element name '%s' to baseband firmware file name.\n", key);
+				goto leave;
+			}
 			char* ext = strrchr(signfn, '.');
 			if (strcmp(ext, ".fls") == 0) {
 				is_fls = 1;
@@ -1304,7 +1311,7 @@ static int restore_sign_bbfw(const char* bbfwtmp, plist_t bbtss, const unsigned
 			const char* fn = zip_get_name(za, i, 0);
 			if (fn) {
 				char* ext = strrchr(fn, '.');
-				if (ext && (strcmp(ext, ".fls") == 0 || strcmp(ext, ".mbn") == 0)) {
+				if (ext && (!strcmp(ext, ".fls") || !strcmp(ext, ".mbn") || !strcmp(ext, ".elf") || !strcmp(ext, ".bin"))) {
 					skip = 1;
 				}
 			}
-- 
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