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Read OTP digits, algorithm, period from uri, support Steam Guard

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This commit is contained in:
Dan Ho 2019-03-14 08:16:24 +08:00
parent 6d909abde8
commit b2eb150c0f
3 changed files with 57 additions and 10 deletions
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36
app/src/main/java/com/zeapo/pwdstore/PasswordEntry.kt
View file

@ -11,7 +11,10 @@ import java.io.UnsupportedEncodingException
class PasswordEntry(private val content: String) {
val password: String
val username: String?
val digits: String?
val totpSecret: String?
val totpPeriod: Long
val totpAlgorithm: String
val hotpSecret: String?
val hotpCounter: Long?
var extraContent: String? = null
@ -24,7 +27,10 @@ class PasswordEntry(private val content: String) {
init {
val passContent = content.split("\n".toRegex(), 2).toTypedArray()
password = passContent[0]
digits = findOtpDigits(content)
totpSecret = findTotpSecret(content)
totpPeriod = findTotpPeriod(content)
totpAlgorithm = findTotpAlgorithm(content)
hotpSecret = findHotpSecret(content)
hotpCounter = findHotpCounter(content)
extraContent = findExtraContent(passContent)
@ -81,6 +87,36 @@ class PasswordEntry(private val content: String) {
return null
}
private fun findOtpDigits(decryptedContent: String): String? {
decryptedContent.split("\n".toRegex()).forEach { line ->
if (line.startsWith("otpauth://totp/")) {
return Uri.parse(line).getQueryParameter("digits")
}
if (line.startsWith("otpauth://hotp/")) {
return Uri.parse(line).getQueryParameter("digits")
}
}
return "6"
}
private fun findTotpPeriod(decryptedContent: String): Long {
decryptedContent.split("\n".toRegex()).forEach { line ->
if (line.startsWith("otpauth://totp/") && Uri.parse(line).getQueryParameter("period") != null) {
return java.lang.Long.parseLong(Uri.parse(line).getQueryParameter("period")!!)
}
}
return 30
}
private fun findTotpAlgorithm(decryptedContent: String): String {
decryptedContent.split("\n".toRegex()).forEach { line ->
if (line.startsWith("otpauth://totp/") && Uri.parse(line).getQueryParameter("algorithm") != null) {
return Uri.parse(line).getQueryParameter("algorithm")
}
}
return "sha1"
}
private fun findHotpSecret(decryptedContent: String): String? {
decryptedContent.split("\n".toRegex()).forEach { line ->
if (line.startsWith("otpauth://hotp/")) {

10
app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt
View file

@ -305,12 +305,14 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound {
copyOtpToClipBoard(
Otp.calculateCode(
entry.totpSecret,
Date().time / (1000 * Otp.TIME_WINDOW)
Date().time / (1000 * entry.totpPeriod),
entry.totpAlgorithm,
entry.digits
)
)
}
crypto_otp_show.text =
Otp.calculateCode(entry.totpSecret, Date().time / (1000 * Otp.TIME_WINDOW))
Otp.calculateCode(entry.totpSecret, Date().time / (1000 * entry.totpPeriod), entry.totpAlgorithm, entry.digits)
} else {
// we only want to calculate and show HOTP if the user requests it
crypto_copy_otp.setOnClickListener {
@ -494,8 +496,8 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound {
}
private fun calculateHotp(entry: PasswordEntry) {
copyOtpToClipBoard(Otp.calculateCode(entry.hotpSecret, entry.hotpCounter!! + 1))
crypto_otp_show.text = Otp.calculateCode(entry.hotpSecret, entry.hotpCounter!! + 1)
copyOtpToClipBoard(Otp.calculateCode(entry.hotpSecret, entry.hotpCounter!! + 1, "sha1", entry.digits))
crypto_otp_show.text = Otp.calculateCode(entry.hotpSecret, entry.hotpCounter!! + 1, "sha1", entry.digits)
crypto_extra_show.text = entry.extraContent
}

21
app/src/main/java/com/zeapo/pwdstore/utils/Otp.java
View file

@ -12,17 +12,17 @@ import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
public class Otp {
public static final int TIME_WINDOW = 30;
private static final String ALGORITHM = "HmacSHA1";
private static final int CODE_DIGITS = 6;
private static final Base32 BASE_32 = new Base32();
private Otp() {
}
public static String calculateCode(String secret, long counter) {
public static String calculateCode(String secret, long counter, String algorithm, String digits) {
String[] steam = {"2", "3", "4", "5", "6", "7", "8", "9", "B", "C",
"D", "F", "G", "H", "J", "K", "M", "N", "P", "Q",
"R", "T", "V", "W", "X", "Y"};
String ALGORITHM = "Hmac" + algorithm.toUpperCase();
SecretKeySpec signingKey = new SecretKeySpec(BASE_32.decode(secret), ALGORITHM);
Mac mac;
@ -42,6 +42,15 @@ public class Otp {
byte[] code = Arrays.copyOfRange(digest, offset, offset + 4);
code[0] = (byte) (0x7f & code[0]);
String strCode = new BigInteger(code).toString();
return strCode.substring(strCode.length() - CODE_DIGITS);
if (digits.equals("s")) {
String output = "";
int bigInt = new BigInteger(code).intValue();
for (int i = 0; i != 5; i++) {
output += steam[bigInt % 26];
bigInt /= 26;
}
return output;
}
else return strCode.substring(strCode.length() - Integer.parseInt(digits));
}
}