- add method to open (maybe) clearsigned files transparently

* ftparchive/writer.cc:
  - use OpenMaybeClearSignedFile to be free from detecting and
    skipping clearsigning metadata in dsc files

1 files changed, 22 insertions, 0 deletions

diff --git a/apt-pkg/contrib/gpgv.h b/apt-pkg/contrib/gpgv.h
index 8e04855e4..ab7d35ab1 100644
--- a/apt-pkg/contrib/gpgv.h
+++ b/apt-pkg/contrib/gpgv.h
@@ -12,6 +12,8 @@
 #include <string>
 #include <vector>
 
+#include <apt-pkg/fileutl.h>
+
 #if __GNUC__ >= 4
 	#define APT_noreturn	__attribute__ ((noreturn))
 #else
@@ -52,10 +54,17 @@ inline void ExecGPGV(std::string const &File, std::string const &FileSig,
  *  The code doesn't support dash-encoded lines as these are not
  *  expected to be present in files we have to deal with.
  *
+ *  The content of the split files is undefined if the splitting was
+ *  unsuccessful.
+ *
+ *  Note that trying to split an unsigned file will fail, but
+ *  not generate an error message.
+ *
  *  @param InFile is the clear-signed file
  *  @param ContentFile is the Fd the message will be written to
  *  @param ContentHeader is a list of all required Amored Headers for the message
  *  @param SignatureFile is the Fd all signatures will be written to
+ *  @return true if the splitting was successful, false otherwise
  */
 bool SplitClearSignedFile(std::string const &InFile, int const ContentFile,
       std::vector<std::string> * const ContentHeader, int const SignatureFile);
@@ -74,4 +83,17 @@ bool SplitClearSignedFile(std::string const &InFile, int const ContentFile,
 bool RecombineToClearSignedFile(std::string const &OutFile, int const ContentFile,
       std::vector<std::string> const &ContentHeader, int const SignatureFile);
 
+/** \brief open a file which might be clear-signed
+ *
+ * This method tries to extract the (signed) message of a file.
+ * If the file isn't signed it will just open the given filename.
+ * Otherwise the message is extracted to a temporary file which
+ * will be opened instead.
+ *
+ * @param ClearSignedFileName is the name of the file to open
+ * @param[out] MessageFile is the FileFd in which the file will be opened
+ * @return true if opening was successful, otherwise false
+ */
+bool OpenMaybeClearSignedFile(std::string const &ClearSignedFileName, FileFd &MessageFile);
+
 #endif