qt: Allow appending a detached signature to an existing file

* lang/qt/src/qgpgmesignjob.cpp (sign_to_filename): Add argument
"appendSignature". Append new detached signature to an existing file if
requested.
* lang/qt/src/signjob.cpp, lang/qt/src/signjob.h (class SignJob): Add
member functions setAppendSignature, appendSignatureEnabled.
* lang/qt/src/signjob_p.h (struct SignJobPrivate): Add member
m_appendSignature.

* lang/qt/tests/run-signjob.cpp (struct CommandLineOptions): Add members
signingFlags, appendSignature. Initialize armor.
(parseCommandLine): Add command line options --detach-sign and --append.
(main): Do not exit if output file exists and append is enabled.
Pass new options to the job.
--

This change simplifies cross-signing a document by appending additional
detached signatures to a file with already existing detached signatures.

GnuPG-bug-id: 6867

1 files changed, 4 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 796e3c9e..c317d2f3 100644
--- a/NEWS
+++ b/NEWS
@@ -24,6 +24,8 @@ Noteworthy changes in version 1.24.0 (unrelease)
 
  * qt: Allow specifying import options when importing keys.  [T7152]
 
+ * qt: Allow appending a detached signature to an existing file.  [T6867]
+
  * Interface changes relative to the 1.23.2 release:
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  GPGME_ENCRYPT_FILE                      NEW.
@@ -67,6 +69,8 @@ Noteworthy changes in version 1.24.0 (unrelease)
  qt: SignJob::outputFile                 NEW.
  qt: SignJob::setSigningFlags            NEW.
  qt: SignJob::signingFlags               NEW.
+ qt: SignJob::setAppendSignature         NEW.
+ qt: SignJob::appendSignatureEnabled     NEW.
  qt: VerifyDetachedJob::setSignatureFile NEW.
  qt: VerifyDetachedJob::signatureFile    NEW.
  qt: VerifyDetachedJob::setSignedFile    NEW.