From 3d5dd65e306ba3ca560b3c221830ee4cdb4363fb Mon Sep 17 00:00:00 2001 From: Wiktor Kwapisiewicz Date: Mon, 6 Nov 2017 12:41:00 +0100 Subject: Display TOTP code if entry contains OTP secret TOTP is calculated on display and on copy to clipboard from secret embedded in entry (either in password or in extra) and the current time. --- .../java/com/zeapo/pwdstore/PasswordEntry.java | 19 ++++++++ .../java/com/zeapo/pwdstore/crypto/PgpActivity.kt | 22 ++++++++++ .../main/java/com/zeapo/pwdstore/utils/Totp.java | 50 ++++++++++++++++++++++ app/src/main/res/layout/decrypt_layout.xml | 39 ++++++++++++++++- app/src/main/res/values/strings.xml | 2 + 5 files changed, 131 insertions(+), 1 deletion(-) create mode 100644 app/src/main/java/com/zeapo/pwdstore/utils/Totp.java (limited to 'app/src/main') diff --git a/app/src/main/java/com/zeapo/pwdstore/PasswordEntry.java b/app/src/main/java/com/zeapo/pwdstore/PasswordEntry.java index d4d3fe81..ba689fe9 100644 --- a/app/src/main/java/com/zeapo/pwdstore/PasswordEntry.java +++ b/app/src/main/java/com/zeapo/pwdstore/PasswordEntry.java @@ -1,5 +1,7 @@ package com.zeapo.pwdstore; +import android.net.Uri; + import java.io.ByteArrayOutputStream; import java.io.UnsupportedEncodingException; @@ -13,6 +15,7 @@ public class PasswordEntry { private final String extraContent; private final String password; private final String username; + private final String totpSecret; public PasswordEntry(final ByteArrayOutputStream os) throws UnsupportedEncodingException { this(os.toString("UTF-8")); @@ -23,6 +26,7 @@ public class PasswordEntry { password = passContent[0]; extraContent = passContent.length > 1 ? passContent[1] : ""; username = findUsername(); + totpSecret = findTotpSecret(decryptedContent); } public String getPassword() { @@ -37,6 +41,10 @@ public class PasswordEntry { return username; } + public String getTotpSecret() { + return totpSecret; + } + public boolean hasExtraContent() { return extraContent.length() != 0; } @@ -45,6 +53,8 @@ public class PasswordEntry { return username != null; } + public boolean hasTotp() { return totpSecret != null; } + private String findUsername() { final String[] extraLines = extraContent.split("\n"); for (String line : extraLines) { @@ -56,4 +66,13 @@ public class PasswordEntry { } return null; } + + private String findTotpSecret(String decryptedContent) { + for (String line : decryptedContent.split("\n")) { + if (line.startsWith("otpauth://totp/")) { + return Uri.parse(line).getQueryParameter("secret"); + } + } + return null; + } } diff --git a/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt b/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt index db2acfac..905f37bf 100644 --- a/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt +++ b/app/src/main/java/com/zeapo/pwdstore/crypto/PgpActivity.kt @@ -20,6 +20,7 @@ import com.zeapo.pwdstore.PasswordEntry import com.zeapo.pwdstore.R import com.zeapo.pwdstore.UserPreference import com.zeapo.pwdstore.pwgenDialogFragment +import com.zeapo.pwdstore.utils.Totp import kotlinx.android.synthetic.main.decrypt_layout.* import kotlinx.android.synthetic.main.encrypt_layout.* import org.apache.commons.io.FileUtils @@ -32,6 +33,7 @@ import java.io.ByteArrayInputStream import java.io.ByteArrayOutputStream import java.io.File import java.nio.charset.Charset +import java.util.Date class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound { private val clipboard: ClipboardManager by lazy { @@ -231,6 +233,20 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound { } } + if (entry.hasTotp()) { + crypto_totp_show.visibility = View.VISIBLE + crypto_totp_show_label.visibility = View.VISIBLE + crypto_copy_totp.visibility = View.VISIBLE + + crypto_copy_totp.setOnClickListener { copyTotpToClipBoard(Totp.calculateCode(entry.totpSecret, Date().time / 1000)) } + crypto_totp_show.typeface = monoTypeface + crypto_totp_show.text = Totp.calculateCode(entry.totpSecret, Date().time / 1000); + } else { + crypto_totp_show.visibility = View.GONE + crypto_totp_show_label.visibility = View.GONE + crypto_copy_totp.visibility = View.GONE + } + if (settings.getBoolean("copy_on_decrypt", true)) { copyPasswordToClipBoard() } @@ -460,6 +476,12 @@ class PgpActivity : AppCompatActivity(), OpenPgpServiceConnection.OnBound { showToast(resources.getString(R.string.clipboard_username_toast_text)) } + private fun copyTotpToClipBoard(code: String) { + val clip = ClipData.newPlainText("pgp_handler_result_pm", code) + clipboard.primaryClip = clip + showToast(resources.getString(R.string.clipboard_totp_toast_text)) + } + private fun shareAsPlaintext() { if (findViewById(R.id.share_password_as_plaintext) == null) diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/Totp.java b/app/src/main/java/com/zeapo/pwdstore/utils/Totp.java new file mode 100644 index 00000000..5e4326e2 --- /dev/null +++ b/app/src/main/java/com/zeapo/pwdstore/utils/Totp.java @@ -0,0 +1,50 @@ +package com.zeapo.pwdstore.utils; + +import android.util.Log; + +import org.apache.commons.codec.binary.Base32; + +import java.math.BigInteger; +import java.nio.ByteBuffer; +import java.security.InvalidKeyException; +import java.security.NoSuchAlgorithmException; +import java.util.Arrays; + +import javax.crypto.Mac; +import javax.crypto.spec.SecretKeySpec; + +public class Totp { + + private static final String ALGORITHM = "HmacSHA1"; + private static final int TIME_WINDOW = 30; + private static final int CODE_DIGITS = 6; + + private static final Base32 BASE_32 = new Base32(); + + private Totp() { + } + + public static String calculateCode(String secret, long epochSeconds) { + SecretKeySpec signingKey = new SecretKeySpec(BASE_32.decode(secret), ALGORITHM); + + Mac mac = null; + try { + mac = Mac.getInstance(ALGORITHM); + mac.init(signingKey); + } catch (NoSuchAlgorithmException e) { + Log.e("TOTP", ALGORITHM + " unavailable - should never happen", e); + return null; + } catch (InvalidKeyException e) { + Log.e("TOTP", "Key is malformed", e); + return null; + } + + long time = epochSeconds / TIME_WINDOW; + byte[] digest = mac.doFinal(ByteBuffer.allocate(8).putLong(time).array()); + int offset = digest[digest.length - 1] & 0xf; + 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); + } +} diff --git a/app/src/main/res/layout/decrypt_layout.xml b/app/src/main/res/layout/decrypt_layout.xml index 971331a9..727b6376 100644 --- a/app/src/main/res/layout/decrypt_layout.xml +++ b/app/src/main/res/layout/decrypt_layout.xml @@ -148,13 +148,50 @@ android:textIsSelectable="true" android:typeface="monospace" /> + + + + + + diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml index 65591586..dd286625 100644 --- a/app/src/main/res/values/strings.xml +++ b/app/src/main/res/values/strings.xml @@ -30,6 +30,7 @@ No OpenPGP Provider selected! Password copied to clipboard, you have %d seconds to paste it somewhere. Username copied to clipboard + TOTP code copied to clipboard Please provide a file name You cannot use an empty password or empty extra content @@ -92,6 +93,7 @@ Password: Extra content: Username: + TOTP: Edit password Copy password Copy username -- cgit v1.2.3