From d6408ce471c294c3e6f901d183b87d521b9bcc56 Mon Sep 17 00:00:00 2001
From: Justus Winter <justus@g10code.com>
Date: Wed, 8 Jun 2016 18:58:57 +0200
Subject: python: idiomatic interface prototype

Signed-off-by: Justus Winter <justus@g10code.com>
---
 lang/python/pyme/errors.py | 59 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 57 insertions(+), 2 deletions(-)

(limited to 'lang/python/pyme/errors.py')

diff --git a/lang/python/pyme/errors.py b/lang/python/pyme/errors.py
index f96877b6..0194931c 100644
--- a/lang/python/pyme/errors.py
+++ b/lang/python/pyme/errors.py
@@ -20,7 +20,10 @@ from . import util
 
 util.process_constants('GPG_ERR_', globals())
 
-class GPGMEError(Exception):
+class PymeError(Exception):
+    pass
+
+class GPGMEError(PymeError):
     def __init__(self, error = None, message = None):
         self.error = error
         self.message = message
@@ -43,8 +46,60 @@ class GPGMEError(Exception):
         return pygpgme.gpgme_err_source(self.error)
 
     def __str__(self):
-        return "%s (%d,%d)"%(self.getstring(), self.getsource(), self.getcode())
+        return self.getstring()
 
 def errorcheck(retval, extradata = None):
     if retval:
         raise GPGMEError(retval, extradata)
+
+# These errors are raised in the idiomatic interface code.
+
+class EncryptionError(PymeError):
+    pass
+
+class InvalidRecipients(EncryptionError):
+    def __init__(self, recipients):
+        self.recipients = recipients
+    def __str__(self):
+        return ", ".join("{}: {}".format(r.fpr,
+                                         pygpgme.gpgme_strerror(r.reason))
+                         for r in self.recipients)
+
+class DeryptionError(PymeError):
+    pass
+
+class UnsupportedAlgorithm(DeryptionError):
+    def __init__(self, algorithm):
+        self.algorithm = algorithm
+    def __str__(self):
+        return self.algorithm
+
+class SigningError(PymeError):
+    pass
+
+class InvalidSigners(SigningError):
+    def __init__(self, signers):
+        self.signers = signers
+    def __str__(self):
+        return ", ".join("{}: {}".format(s.fpr,
+                                         pygpgme.gpgme_strerror(s.reason))
+                         for s in self.signers)
+
+class VerificationError(PymeError):
+    pass
+
+class BadSignatures(VerificationError):
+    def __init__(self, result):
+        self.result = result
+    def __str__(self):
+        return ", ".join("{}: {}".format(s.fpr,
+                                         pygpgme.gpgme_strerror(s.status))
+                         for s in self.result.signatures
+                         if s.status != NO_ERROR)
+
+class MissingSignatures(VerificationError):
+    def __init__(self, result, missing):
+        self.result = result
+        self.missing = missing
+    def __str__(self):
+        return ", ".join(k.subkeys[0].fpr for k in self.missing)
-- 
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