X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/34e8a998eb9e4f75f989acc6f8b9db8010e56b7c..84b286f65c55e21b4734a17474f1cba464cbbd9c:/methods/gpgv.cc diff --git a/methods/gpgv.cc b/methods/gpgv.cc index c58e6cc45..4071cbac6 100644 --- a/methods/gpgv.cc +++ b/methods/gpgv.cc @@ -1,16 +1,28 @@ -#include +#include + #include +#include +#include +#include #include #include -#include -#include -#include -#include +#include #include +#include +#include +#include +#include #include +#include #include -#include +#include +#include + +#include + +using std::string; +using std::vector; #define GNUPGPREFIX "[GNUPG:]" #define GNUPGBADSIG "[GNUPG:] BADSIG" @@ -45,114 +57,24 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile, vector &NoPubKeySigners) { bool const Debug = _config->FindB("Debug::Acquire::gpgv", false); - // setup a (empty) stringstream for formating the return value - std::stringstream ret; - ret.str(""); if (Debug == true) std::clog << "inside VerifyGetSigners" << std::endl; - pid_t pid; int fd[2]; - FILE *pipein; - int status; - string const gpgvpath = _config->Find("Dir::Bin::gpg", "/usr/bin/gpgv"); - // FIXME: remove support for deprecated APT::GPGV setting - string const trustedFile = _config->FindFile("Dir::Etc::Trusted", - _config->Find("APT::GPGV::TrustedKeyring", "/etc/apt/trusted.gpg").c_str()); - string const trustedPath = _config->FindDir("Dir::Etc::TrustedParts", "/etc/apt/trusted.gpg.d"); - if (Debug == true) - { - std::clog << "gpgv path: " << gpgvpath << std::endl; - std::clog << "Keyring file: " << trustedFile << std::endl; - std::clog << "Keyring path: " << trustedPath << std::endl; - } - - vector keyrings = GetListOfFilesInDir(trustedPath, "gpg", false); - if (FileExists(trustedFile) == true) - keyrings.push_back(trustedFile); - - if (keyrings.empty() == true) - { - // TRANSLATOR: %s is the trusted keyring parts directory - ioprintf(ret, _("No keyring installed in %s."), trustedPath.c_str()); - return ret.str(); - } if (pipe(fd) < 0) return "Couldn't create pipe"; - pid = fork(); + pid_t pid = fork(); if (pid < 0) return string("Couldn't spawn new process") + strerror(errno); else if (pid == 0) - { - const char *Args[400]; - unsigned int i = 0; - - Args[i++] = gpgvpath.c_str(); - Args[i++] = "--status-fd"; - Args[i++] = "3"; - Args[i++] = "--ignore-time-conflict"; - for (vector::const_iterator K = keyrings.begin(); - K != keyrings.end(); ++K) - { - Args[i++] = "--keyring"; - Args[i++] = K->c_str(); - // check overflow (minus a bit of extra space at the end) - if(i >= sizeof(Args)/sizeof(char*)-5) { - std::clog << _("E: Too many keyrings should be passed to gpgv. Exiting.") << std::endl; - exit(111); - } - } - - Configuration::Item const *Opts; - Opts = _config->Tree("Acquire::gpgv::Options"); - if (Opts != 0) - { - Opts = Opts->Child; - for (; Opts != 0; Opts = Opts->Next) - { - if (Opts->Value.empty() == true) - continue; - Args[i++] = Opts->Value.c_str(); - // check overflow (minus a bit of extra space at the end) - if(i >= sizeof(Args)/sizeof(char*)-5) { - std::clog << _("E: Argument list from Acquire::gpgv::Options too long. Exiting.") << std::endl; - exit(111); - } - } - } - Args[i++] = file; - Args[i++] = outfile; - Args[i++] = NULL; - - if (Debug == true) - { - std::clog << "Preparing to exec: " << gpgvpath; - for(unsigned int j=0;Args[j] != NULL; j++) - std::clog << " " << Args[j]; - std::clog << std::endl; - } - int const nullfd = open("/dev/null", O_RDONLY); - close(fd[0]); - // Redirect output to /dev/null; we read from the status fd - dup2(nullfd, STDOUT_FILENO); - dup2(nullfd, STDERR_FILENO); - // Redirect the pipe to the status fd (3) - dup2(fd[1], 3); - - putenv((char *)"LANG="); - putenv((char *)"LC_ALL="); - putenv((char *)"LC_MESSAGES="); - execvp(gpgvpath.c_str(), (char **)Args); - - exit(111); - } + ExecGPGV(outfile, file, 3, fd); close(fd[1]); - pipein = fdopen(fd[0], "r"); - + FILE *pipein = fdopen(fd[0], "r"); + // Loop over the output of gpgv, and check the signatures. size_t buffersize = 64; char *buffer = (char *) malloc(buffersize); @@ -164,8 +86,16 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile, // Read a line. Sigh. while ((c = getc(pipein)) != EOF && c != '\n') { - if (bufferoff == buffersize) - buffer = (char *) realloc(buffer, buffersize *= 2); + if (bufferoff == buffersize) + { + char* newBuffer = (char *) realloc(buffer, buffersize *= 2); + if (newBuffer == NULL) + { + free(buffer); + return "Couldn't allocate a buffer big enough for reading"; + } + buffer = newBuffer; + } *(buffer+bufferoff) = c; bufferoff++; } @@ -224,7 +154,9 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile, } } fclose(pipein); + free(buffer); + int status; waitpid(pid, &status, 0); if (Debug == true) { @@ -238,18 +170,19 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile, return ""; } else if (WEXITSTATUS(status) == 1) - { return _("At least one invalid signature was encountered."); - } else if (WEXITSTATUS(status) == 111) + return _("Could not execute 'gpgv' to verify signature (is gpgv installed?)"); + else if (WEXITSTATUS(status) == 112) { - ioprintf(ret, _("Could not execute '%s' to verify signature (is gpgv installed?)"), gpgvpath.c_str()); - return ret.str(); + // acquire system checks for "NODATA" to generate GPG errors (the others are only warnings) + std::string errmsg; + //TRANSLATORS: %s is a single techy word like 'NODATA' + strprintf(errmsg, _("Clearsigned file isn't valid, got '%s' (does the network require authentication?)"), "NODATA"); + return errmsg; } else - { return _("Unknown error executing gpgv"); - } } bool GPGVMethod::Fetch(FetchItem *Itm) @@ -284,21 +217,21 @@ bool GPGVMethod::Fetch(FetchItem *Itm) { errmsg += _("The following signatures were invalid:\n"); for (vector::iterator I = BadSigners.begin(); - I != BadSigners.end(); I++) + I != BadSigners.end(); ++I) errmsg += (*I + "\n"); } if (!WorthlessSigners.empty()) { errmsg += _("The following signatures were invalid:\n"); for (vector::iterator I = WorthlessSigners.begin(); - I != WorthlessSigners.end(); I++) + I != WorthlessSigners.end(); ++I) errmsg += (*I + "\n"); } if (!NoPubKeySigners.empty()) { errmsg += _("The following signatures couldn't be verified because the public key is not available:\n"); for (vector::iterator I = NoPubKeySigners.begin(); - I != NoPubKeySigners.end(); I++) + I != NoPubKeySigners.end(); ++I) errmsg += (*I + "\n"); } } @@ -329,8 +262,10 @@ bool GPGVMethod::Fetch(FetchItem *Itm) int main() { setlocale(LC_ALL, ""); - + GPGVMethod Mth; + Mth.DropPrivsOrDie(); + return Mth.Run(); }