public class AppSigning{
public final static StringMD5 ="MD5";
public final static StringSHA1 ="SHA1";
public final static StringSHA256 ="SHA256";
private static final StringTAG ="AppSigning";
private static final HashMap<String, ArrayList<String>> mSignMap =new HashMap<>();
/**
* 返回一个签名的对应类型的字符串
*
* @param context
* @param type
* @return 因为一个安装包可以被多个签名文件签名，所以返回一个签名信息的list
*/
public static ArrayList<String> getSignInfo(Context context, String type) {
if (context ==null || type ==null) {
return null;
}
String packageName = context.getPackageName();
if (packageName ==null) {
return null;
}
if (mSignMap.get(type) !=null) {
return mSignMap.get(type);
}
ArrayList<String> mList =new ArrayList<String>();
try {
Signature[] signs =getSignatures(context, packageName);
for (Signature sig : signs) {
String tmp ="error!";
if (MD5.equals(type)) {
tmp =getSignatureByteString(sig, MD5);
} else if (SHA1.equals(type)) {
tmp =getSignatureByteString(sig, SHA1);
} else if (SHA256.equals(type)) {
tmp =getSignatureByteString(sig, SHA256);
}
mList.add(tmp);
}
} catch (Exception e) {
Log.e(TAG, e.toString());
}
mSignMap.put(type, mList);
return mList;
}
/**
* 获取签名sha1值
*
* @param context
* @return
*/
public static StringgetSha1(Context context) {
String res ="";
ArrayList<String> mlist =getSignInfo(context, SHA1);
if (mlist !=null && mlist.size() !=0) {
res = mlist.get(0);
}
return res;
}
/**
* 获取签名MD5值
*
* @param context
* @return
*/
public static StringgetMD5(Context context) {
String res ="";
ArrayList<String> mlist =getSignInfo(context, MD5);
if (mlist !=null && mlist.size() !=0) {
res = mlist.get(0);
}
return res;
}
/**
* 获取签名SHA256值
*
* @param context
* @return
*/
public static StringgetSHA256(Context context) {
String res ="";
ArrayList<String> mlist =getSignInfo(context, SHA256);
if (mlist !=null && mlist.size() !=0) {
res = mlist.get(0);
}
return res;
}
/**
* 返回对应包的签名信息
*
* @param context
* @param packageName
* @return
*/
private static Signature[] getSignatures(Context context, String packageName) {
PackageInfo packageInfo =null;
try {
packageInfo = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
return packageInfo.signatures;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 获取相应的类型的字符串（把签名的byte[]信息转换成16进制）
*
* @param sig
* @param type
* @return
*/
private static StringgetSignatureString(Signature sig, String type) {
byte[] hexBytes = sig.toByteArray();
String fingerprint ="error!";
try {
MessageDigest digest = MessageDigest.getInstance(type);
if (digest !=null) {
byte[] digestBytes = digest.digest(hexBytes);
StringBuilder sb =new StringBuilder();
for (byte digestByte : digestBytes) {
sb.append((Integer.toHexString((digestByte &0xFF) |0x100)).substring(1, 3));
}
fingerprint = sb.toString();
}
} catch (Exception e) {
Log.e(TAG, "getSignatureString: ", e);
}
return fingerprint;
}
/**
* 获取相应的类型的字符串（把签名的byte[]信息转换成 95:F4:D4:FG 这样的字符串形式）
*
* @param sig
* @param type
* @return
*/
private static StringgetSignatureByteString(Signature sig, String type) {
byte[] hexBytes = sig.toByteArray();
String fingerprint ="error!";
try {
MessageDigest digest = MessageDigest.getInstance(type);
if (digest !=null) {
byte[] digestBytes = digest.digest(hexBytes);
StringBuilder sb =new StringBuilder();
for (byte digestByte : digestBytes) {
sb.append(((Integer.toHexString((digestByte &0xFF) |0x100)).substring(1, 3)).toUpperCase());
sb.append(":");
}
fingerprint = sb.substring(0, sb.length() -1);
}
} catch (Exception e) {
Log.e(TAG, "getSignatureByteString failed", e);
}
return fingerprint;
}
}
