feat(pgpainless): add detection for passphrase-less messages (#3069)

* WIP: feat(pgpainless): add detection for passphrase-less messages

* refactor: test keys instead of the message

This makes more logical sense

3 files changed, 15 insertions, 2 deletions

diff --git a/app/src/main/java/app/passwordstore/data/crypto/CryptoRepository.kt b/app/src/main/java/app/passwordstore/data/crypto/CryptoRepository.kt
index 50d7a841..773a355a 100644
--- a/app/src/main/java/app/passwordstore/data/crypto/CryptoRepository.kt
+++ b/app/src/main/java/app/passwordstore/data/crypto/CryptoRepository.kt
@@ -45,6 +45,11 @@ constructor(
     out: ByteArrayOutputStream,
   ) = withContext(dispatcherProvider.io()) { decryptPgp(password, identities, message, out) }
 
+  suspend fun isPasswordProtected(identifiers: List<PGPIdentifier>): Boolean {
+    val keys = identifiers.map { pgpKeyManager.getKeyById(it) }.filterValues()
+    return pgpCryptoHandler.isPassphraseProtected(keys)
+  }
+
   suspend fun encrypt(
     identities: List<PGPIdentifier>,
     content: ByteArrayInputStream,
diff --git a/app/src/main/java/app/passwordstore/ui/autofill/AutofillDecryptActivity.kt b/app/src/main/java/app/passwordstore/ui/autofill/AutofillDecryptActivity.kt
index 1af46a89..4518e62f 100644
--- a/app/src/main/java/app/passwordstore/ui/autofill/AutofillDecryptActivity.kt
+++ b/app/src/main/java/app/passwordstore/ui/autofill/AutofillDecryptActivity.kt
@@ -131,12 +131,16 @@ class AutofillDecryptActivity : BasePGPActivity() {
     }
   }
 
-  private fun askPassphrase(
+  private suspend fun askPassphrase(
     filePath: String,
     identifiers: List<PGPIdentifier>,
     clientState: Bundle,
     action: AutofillAction,
   ) {
+    if (!repository.isPasswordProtected(identifiers)) {
+      decryptWithPassphrase(File(filePath), identifiers, clientState, action, password = "")
+      return
+    }
     val dialog = PasswordDialog()
     dialog.show(supportFragmentManager, "PASSWORD_DIALOG")
     dialog.setFragmentResultListener(PasswordDialog.PASSWORD_RESULT_KEY) { key, bundle ->
diff --git a/app/src/main/java/app/passwordstore/ui/crypto/DecryptActivity.kt b/app/src/main/java/app/passwordstore/ui/crypto/DecryptActivity.kt
index b222f2ea..6f14bdea 100644
--- a/app/src/main/java/app/passwordstore/ui/crypto/DecryptActivity.kt
+++ b/app/src/main/java/app/passwordstore/ui/crypto/DecryptActivity.kt
@@ -179,7 +179,7 @@ class DecryptActivity : BasePGPActivity() {
     }
   }
 
-  private fun askPassphrase(
+  private suspend fun askPassphrase(
     isError: Boolean,
     gpgIdentifiers: List<PGPIdentifier>,
     authResult: BiometricResult,
@@ -189,6 +189,10 @@ class DecryptActivity : BasePGPActivity() {
     } else {
       finish()
     }
+    if (!repository.isPasswordProtected(gpgIdentifiers)) {
+      decryptWithPassphrase(passphrase = "", gpgIdentifiers, authResult)
+      return
+    }
     val dialog = PasswordDialog()
     if (isError) {
       dialog.setError()