android 獲取apk md5值

 

android 獲取apk md5值

1， 獲取 Signature

2. 根據Signature計算md5和sha1信息，獲取簽名公鑰信息

 

 

TextView text = null;

StringBuffer sb = new StringBuffer();

 

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

text = (TextView) findViewById(R.id.text);

try {

PackageInfo pi = getPackageManager().getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);

 

Signature signatures = pi.signatures[0];

 

MessageDigest md = MessageDigest.getInstance("MD5");

md.update(signatures.toByteArray());

byte[] digest = md.digest();

String res = toHexString(digest);

Log.e(TAG, "apk md5 = "+res);

sb.append("apk md5 = "+res);

 

MessageDigest md2 = MessageDigest.getInstance("SHA1");

md2.update(signatures.toByteArray());

byte[] digest2 = md.digest();

String res2 = toHexString(digest2);

Log.e(TAG, "apk SHA1 = "+res2);

sb.append("\napk SHA1 = "+res2);

 

 

 

ByteArrayInputStream bais = new ByteArrayInputStream(signatures.toByteArray());

CertificateFactory cf = CertificateFactory.getInstance("X.509");

X509Certificate cert = (X509Certificate)cf.generateCertificate(bais);

 

String sigAlgName = cert.getSigAlgName();

String subjectDN = cert.getSubjectDN().toString();

Log.e(TAG, "sigAlgName = "+sigAlgName);

Log.e(TAG, "subjectDN = "+subjectDN);

sb.append("\n sigAlgName = "+sigAlgName);

sb.append("\n subjectDN = "+subjectDN);

bais.close();

 

 

} catch (NameNotFoundException e) {

e.printStackTrace();

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

} catch (CertificateException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

 

text.setText(sb.toString());

 

}

 

 

private void byte2hex(byte b, StringBuffer buf) {

char[] hexChars = { '0', '1', '2', '3', '4', '5', '6', '7', '8',

'9', 'A', 'B', 'C', 'D', 'E', 'F' };

int high = ((b & 0xf0) >> 4);

int low = (b & 0x0f);

buf.append(hexChars[high]);

buf.append(hexChars[low]);

}

 

/*

* Converts a byte array to hex string

*/

private String toHexString(byte[] block) {

StringBuffer buf = new StringBuffer();

 

int len = block.length;

 

for (int i = 0; i < len; i++) {

byte2hex(block[i], buf);

if (i < len-1) {

buf.append(":");

}

}

return buf.toString();

}