avoid triggering gcc's -Wunsafe-loop-optimizations in EDSP

[apt.git] / apt-pkg / contrib / gpgv.h

diff --git a/apt-pkg/contrib/gpgv.h b/apt-pkg/contrib/gpgv.h
index 8aeea2fb33c6170943274bd40584608464034304..2a4cdad72f7a6aa4372c252559dd66b94d725194 100644 (file)
--- a/apt-pkg/contrib/gpgv.h
+++ b/apt-pkg/contrib/gpgv.h
@@ -9,30 +9,84 @@
 #ifndef CONTRIB_GPGV_H
 #define CONTRIB_GPGV_H
 
+#include <apt-pkg/macros.h>
+
 #include <string>
+#include <vector>
 
-#if __GNUC__ >= 4
-       #define APT_noreturn    __attribute__ ((noreturn))
-#else
-       #define APT_noreturn    /* no support */
+#ifndef APT_10_CLEANER_HEADERS
+#include <apt-pkg/fileutl.h>
 #endif
 
+class FileFd;
+
 /** \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.
+ * deal with a clear-signed message. Note that the method will accept
+ * and validate files which include additional (unsigned) messages
+ * without complaining. Do NOT open files accepted by this method
+ * for reading. Use #OpenMaybeClearSignedFile to access the message
+ * instead to ensure you are only reading signed data.
+ *
+ * The method does not return, but has some notable exit-codes:
+ * 111 signals an internal error like the inability to execute gpgv,
+ * 112 indicates a clear-signed file which doesn't include a message,
+ *  which can happen if APT is run while on a network requiring
+ *  authentication before usage (e.g. in hotels)
+ * All other exit-codes are passed-through from gpgv.
  *
  * @param File is the message (unsigned or clear-signed)
  * @param FileSig is the signature (detached or clear-signed)
+ * @param statusfd is the fd given to gpgv as --status-fd
+ * @param fd is used as a pipe for the standard output of gpgv
+ * @param key is the specific one to be used instead of using all
  */
 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, int fd[2], std::string const &Key = "") APT_NORETURN;
+inline APT_NORETURN 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 a FileFd pointers is NULL it will not be used and the content
+ *  which would have been written to it is silently discarded.
+ *
+ *  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 FileFd the message will be written to
+ *  @param ContentHeader is a list of all required Amored Headers for the message
+ *  @param SignatureFile is the FileFd all signatures will be written to
+ *  @return true if the splitting was successful, false otherwise
+ */
+bool SplitClearSignedFile(std::string const &InFile, FileFd * const ContentFile,
+      std::vector<std::string> * const ContentHeader, FileFd * 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