// -*- 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> #include <apt-pkg/fileutl.h> #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. 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 noteable 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) */ 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 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