1 files changed, 77 insertions, 0 deletions
diff --git a/apt-pkg/contrib/gpgv.h b/apt-pkg/contrib/gpgv.h
new file mode 100644
index 000000000..8e04855e4
--- /dev/null
+++ b/apt-pkg/contrib/gpgv.h
@@ -0,0 +1,77 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   Helpers to deal with gpgv better and more easily
+
+   ##################################################################### */
+									/*}}}*/
+#ifndef CONTRIB_GPGV_H
+#define CONTRIB_GPGV_H
+
+#include <string>
+#include <vector>
+
+#if __GNUC__ >= 4
+	#define APT_noreturn	__attribute__ ((noreturn))
+#else
+	#define APT_noreturn	/* no support */
+#endif
+
+/** \brief generates and run the command to verify a file with gpgv
+ *
+ * If File and FileSig specify the same file it is assumed that we
+ * deal with a clear-signed message. In that case the file will be
+ * rewritten to be in a good-known format without uneeded whitespaces
+ * and additional messages (unsigned or signed).
+ *
+ * @param File is the message (unsigned or clear-signed)
+ * @param FileSig is the signature (detached or clear-signed)
+ */
+void ExecGPGV(std::string const &File, std::string const &FileSig,
+      int const &statusfd, int fd[2]) APT_noreturn;
+inline void ExecGPGV(std::string const &File, std::string const &FileSig,
+      int const &statusfd = -1) {
+   int fd[2];
+   ExecGPGV(File, FileSig, statusfd, fd);
+};
+
+#undef APT_noreturn
+
+/** \brief Split an inline signature into message and signature
+ *
+ *  Takes a clear-signed message and puts the first signed message
+ *  in the content file and all signatures following it into the
+ *  second. Unsigned messages, additional messages as well as
+ *  whitespaces are discarded. The resulting files are suitable to
+ *  be checked with gpgv.
+ *
+ *  If one or all Fds are -1 they will not be used and the content
+ *  which would have been written to them is discarded.
+ *
+ *  The code doesn't support dash-encoded lines as these are not
+ *  expected to be present in files we have to deal with.
+ *
+ *  @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
+ */
+bool SplitClearSignedFile(std::string const &InFile, int const ContentFile,
+      std::vector<std::string> * const ContentHeader, int const SignatureFile);
+
+/** \brief recombines message and signature to an inline signature
+ *
+ *  Reverses the splitting down by #SplitClearSignedFile by writing
+ *  a well-formed clear-signed message without unsigned messages,
+ *  additional signed messages or just trailing whitespaces
+ *
+ *  @param OutFile will be clear-signed file
+ *  @param ContentFile is the Fd the message will be read from
+ *  @param ContentHeader is a list of all required Amored Headers for the message
+ *  @param SignatureFile is the Fd all signatures will be read from
+ */
+bool RecombineToClearSignedFile(std::string const &OutFile, int const ContentFile,
+      std::vector<std::string> const &ContentHeader, int const SignatureFile);
+
+#endif