From 7633ef9d605057ac26cbce354edc4c0fc9b18e3f Mon Sep 17 00:00:00 2001
From: SET <nmset@yandex.com>
Date: Sun, 15 Nov 2020 11:58:07 +0100
Subject: [PATCH] Add function to export public keys.

Expects a fingerprint to export a single public key in armor mode.
---
 GpgMEWorker.cpp | 17 ++++++++++++++++-
 GpgMEWorker.h   | 10 ++++++++--
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/GpgMEWorker.cpp b/GpgMEWorker.cpp
index 7a2d03f..20f4aa9 100644
--- a/GpgMEWorker.cpp
+++ b/GpgMEWorker.cpp
@@ -273,10 +273,25 @@ const Error GpgMEWorker::ExportPrivateKey(const char * pattern, string& buffer,
 
     Error e = ctx->exportPublicKeys(pattern, kData, flags);
     buffer = kData.toString(); // Empty
-    
+
     delete ppp;
     delete ctx;
 
     return e;
 }
 #endif
+
+const Error GpgMEWorker::ExportPublicKey(const char* pattern, string& buffer)
+{
+    GpgME::Data kData;
+    Context * ctx = Context::createForProtocol(Protocol::OpenPGP);
+    ctx->setArmor(true);
+    uint flags = Context::ExportDefault;
+
+    Error e = ctx->exportPublicKeys(pattern, kData, flags);
+    buffer = kData.toString();
+
+    delete ctx;
+
+    return e;
+}
diff --git a/GpgMEWorker.h b/GpgMEWorker.h
index 8bdee87..31b6535 100644
--- a/GpgMEWorker.h
+++ b/GpgMEWorker.h
@@ -146,9 +146,15 @@ public:
      * @return 
      */
     const Error ExportPrivateKey(const char * pattern, string& buffer,
-                          const string& passphrase = "");
+                                 const string& passphrase = "");
 #endif
-
+    /**
+     * Export a public key.
+     * @param pattern : a key fingerprint
+     * @param buffer : returns data in armor mode
+     * @return 
+     */
+    const Error ExportPublicKey(const char * pattern, string& buffer);
 private:
     Context * m_ctx;
     // GPG will fetch a password here.