universal7885: host_tools: Introduce a tool to update fp

.github/workflows/update_fp.yml

@@ -0,0 +1,17 @@
+name: check fp update
+
+on:
+  schedule:
+    - cron: '0 7 * * 2,5'
+  push:
+  workflow_dispatch:
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+    
+      - name: Install dependencies
+        run: bash universal7885-common/host-tools/update_fp.sh

universal7885-common/host-tools/.gitignore

@@ -0,0 +1 @@
+updater

universal7885-common/host-tools/BuildFpUpdater.cc

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+#include <curl/curl.h>
+
+#include <iostream>
+#include <string>
+#include <sstream>
+#include <vector>
+#include <fstream>
+
+// Tracking Evolution-X's PixelPropsUtils
+#define UPSTREAM_URL "https://raw.githubusercontent.com/Evolution-X/frameworks_base/tiramisu/core/java/com/android/internal/util/evolution/PixelPropsUtils.java"
+
+// Use Pixel 6 Pro's fingerprint
+#define DEVICE_CODENAME "raven"
+#define DEVICE_VENDOR "google"
+
+#define STD_STRING_CONTAINS(str, search) (str.find(search) != std::string::npos)
+		
+typedef struct result {
+	bool vaild = false;
+	std::string data = "";
+} result_t;
+
+struct build_data {
+	std::string vendor;
+	std::string codename;
+	int android_version;
+	std::string buildid;
+	std::string vendordata;
+};
+
+static size_t WriteCallback(void *contents, size_t size, size_t nmemb,
+                            void *userp) {
+  static_cast<std::string *>(userp)->append(static_cast<char *>(contents), size * nmemb);
+  return size * nmemb;
+}
+
+static std::vector<std::string> splitNewLines (const std::string& buffer) 
+{
+    auto result = std::vector<std::string>{};
+    auto ss = std::stringstream{buffer};
+
+    for (std::string line; std::getline(ss, line, '\n');)
+	    result.push_back(line);
+
+    return result;
+}
+
+static result_t *checkIfVaild(const std::string& line)
+{
+	auto res = new result_t;
+
+	// Is it related to <codename>?
+	if (!STD_STRING_CONTAINS(line, DEVICE_CODENAME))
+		return res;
+
+	// Remove non-fingerprint stuff.
+	// It should be <vendor>/<codename>/.. format
+	if (!STD_STRING_CONTAINS(line, DEVICE_VENDOR))
+		return res;
+
+	res->vaild = true;
+	res->data = line;
+	return res;
+}
+
+static result_t *parseJavaFile(const std::string& buffer)
+{
+	auto kLines = splitNewLines(buffer);
+	for (const auto line : kLines) {
+		const auto res = checkIfVaild(line);
+		if (res->vaild) {
+			std::string data = res->data;
+			res->data = data.substr(data.find(DEVICE_VENDOR));
+			data = res->data;
+			res->data = data.substr(0, data.find_last_of('"'));
+			return res;
+		} else
+			delete res;
+	}
+	// We failed to find the line. return nothing.
+	return new result_t;
+}
+
+static std::string dirname(const std::string& arg)
+{
+	auto idx = arg.find_last_of("/\\");
+	return arg.substr(0, idx);
+}
+
+static std::string fromBuildDataToFP(struct build_data *data)
+{
+	const char *fmt = "%s/%s/%s:%d/%s/%s:user/release-keys";
+	int size = std::snprintf(nullptr, 0, fmt, data->vendor.c_str(), data->codename.c_str(), data->codename.c_str(), data->android_version, data->buildid.c_str(), data->vendordata.c_str());
+	std::vector<char> buf(size + 1);
+	std::snprintf(&buf[0], buf.size(), fmt, data->vendor.c_str(), data->codename.c_str(), data->codename.c_str(), data->android_version, data->buildid.c_str(), data->vendordata.c_str());
+
+	return std::string(buf.begin(), buf.end());
+}
+
+static std::string fromBuildDataToDesc(struct build_data *data)
+{
+	const char *fmt = "%s-user %d %s %s release-keys";
+	int size = std::snprintf(nullptr, 0, fmt, data->codename.c_str(), data->android_version, data->buildid.c_str(), data->vendordata.c_str());
+	std::vector<char> buf(size + 1);
+	std::snprintf(&buf[0], buf.size(), fmt, data->codename.c_str(), data->android_version, data->buildid.c_str(), data->vendordata.c_str());
+
+	return std::string(buf.begin(), buf.end());
+}
+
+static struct build_data *serialize(const std::string& fpdata)
+{
+	auto split = std::vector<std::string>{};
+	auto ss = std::stringstream{fpdata};
+	auto data = new struct build_data;
+	for (std::string line; std::getline(ss, line, '/');)
+		split.push_back(line);
+
+	// Fingerprint: "<VENDOR>/<CODENAME>/<CODENAME>:<AND_VER>/<BUILDID>/<VENDORDATA>:user/release-keys"
+	data->vendor = split[0];
+	std::string mixed = split[2];
+	int idx = mixed.find(':');
+	data->codename = mixed.substr(0, idx);
+	data->android_version = stoi(mixed.substr(idx + 1));
+	data->buildid = split[3];
+	mixed = split[4];
+	idx = mixed.find(':');
+	data->vendordata = mixed.substr(0, idx);
+	return data;
+}
+
+static void apply(const std::string& path, struct build_data *data)
+{
+	std::remove(path.c_str());
+	std::ofstream file(path);
+	if (file.is_open()) {
+		std::string str;
+		file << "# Autogenerated by " << __FILE__ << std::endl;
+		file << "PRODUCT_GMS_CLIENTID_BASE := android-google" << std::endl;
+		file << std::endl;
+		str = fromBuildDataToFP(data);
+		str.resize(str.find('\0'));
+		file << "BUILD_FINGERPRINT := \"" << str << "\"" << std::endl;
+		file << std::endl;
+		file << "PRODUCT_BUILD_PROP_OVERRIDES += \\" << std::endl;
+		str = fromBuildDataToDesc(data);
+		str.resize(str.find('\0'));
+		file << "\tPRIVATE_BUILD_DESC=\"" << str << "\"" << std::endl;
+		file.close();
+	}
+}
+
+int main(int argc, const char **argv) {
+  CURL *curl;
+  CURLcode res;
+  std::string readBuffer = "";
+  std::string execDir = dirname(argv[0]);
+
+  curl = curl_easy_init();
+  if (curl != nullptr) {
+    curl_easy_setopt(curl, CURLOPT_URL, UPSTREAM_URL);
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
+    curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+    if (res)
+	    return res;
+  }
+
+  auto parseRes = parseJavaFile(readBuffer);
+  if (!parseRes->vaild)
+	  return 1;
+
+  auto build = serialize(parseRes->data);
+  delete parseRes;
+  apply(execDir + "/../fingerprint.mk", build);
+  
+  return 0;
+}

universal7885-common/host-tools/update_fp.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
+git config --local user.name "github-actions[bot]"
+
+sudo apt update
+sudo apt install -y libcurl4-openssl-dev clang
+cd universal7885-common/host-tools/
+clang++ BuildFpUpdater.cc -o updater -lcurl
+./updater
+git add ..
+git commit -m "universal7885: Update fp [`date`]"
+git push