cpp: Allow export of secret subkeys

* lang/cpp/src/context.h (enum Context::ExportMode): Add value
ExportSecretSubkey.
(class Context): Add member functions exportSecretSubkeys and
startSecretSubkeyExport.
* lang/cpp/src/context.cpp (Context::exportPublicKeys,
Context::startPublicKeyExport): Return error if ExportSecretSubkey
mode flag is set.
(Context::exportSecretSubkeys, Context::startSecretSubkeyExport):
Implement.
--

GnuPG-bug-id: 5757

1 files changed, 6 insertions, 0 deletions

diff --git a/lang/cpp/src/context.h b/lang/cpp/src/context.h
index 2631678a..bfa6b8d8 100644
--- a/lang/cpp/src/context.h
+++ b/lang/cpp/src/context.h
@@ -191,6 +191,7 @@ public:
         ExportPKCS12 = 64,
         ExportNoUID = 128, // obsolete; has no effect
         ExportSSH = 256,
+        ExportSecretSubkey = 512,
     };
 
     GpgME::Error exportPublicKeys(const char *pattern, Data &keyData);
@@ -207,6 +208,11 @@ public:
     GpgME::Error startSecretKeyExport(const char *pattern, Data &keyData, unsigned int mode = ExportSecret);
     GpgME::Error startSecretKeyExport(const char *pattern[], Data &keyData, unsigned int mode = ExportSecret);
 
+    GpgME::Error exportSecretSubkeys(const char *pattern, Data &keyData, unsigned int mode = ExportSecretSubkey);
+    GpgME::Error exportSecretSubkeys(const char *pattern[], Data &keyData, unsigned int mode = ExportSecretSubkey);
+    GpgME::Error startSecretSubkeyExport(const char *pattern, Data &keyData, unsigned int mode = ExportSecretSubkey);
+    GpgME::Error startSecretSubkeyExport(const char *pattern[], Data &keyData, unsigned int mode = ExportSecretSubkey);
+
     // generic export functions; prefer using the specific public/secret key export functions
     GpgME::Error exportKeys(const char *pattern, Data &keyData, unsigned int mode = ExportDefault);
     GpgME::Error exportKeys(const char *pattern[], Data &keyData, unsigned int mode = ExportDefault);