/* import.c - Import certificates * Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ #include #include #include #include #include #include #include #include "gpgsm.h" #include #include #include "keydb.h" #include "exechelp.h" #include "i18n.h" struct stats_s { unsigned long count; unsigned long imported; unsigned long unchanged; unsigned long not_imported; unsigned long secret_read; unsigned long secret_imported; unsigned long secret_dups; }; static gpg_error_t parse_p12 (ctrl_t ctrl, ksba_reader_t reader, FILE **retfp, struct stats_s *stats); static void print_imported_status (CTRL ctrl, ksba_cert_t cert, int new_cert) { char *fpr; fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1); if (new_cert) gpgsm_status2 (ctrl, STATUS_IMPORTED, fpr, "[X.509]", NULL); gpgsm_status2 (ctrl, STATUS_IMPORT_OK, new_cert? "1":"0", fpr, NULL); xfree (fpr); } /* Print an IMPORT_PROBLEM status. REASON is one of: 0 := "No specific reason given". 1 := "Invalid Certificate". 2 := "Issuer Certificate missing". 3 := "Certificate Chain too long". 4 := "Error storing certificate". */ static void print_import_problem (CTRL ctrl, ksba_cert_t cert, int reason) { char *fpr = NULL; char buf[25]; int i; sprintf (buf, "%d", reason); if (cert) { fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1); /* detetect an error (all high) value */ for (i=0; fpr[i] == 'F'; i++) ; if (!fpr[i]) { xfree (fpr); fpr = NULL; } } gpgsm_status2 (ctrl, STATUS_IMPORT_PROBLEM, buf, fpr, NULL); xfree (fpr); } void print_imported_summary (CTRL ctrl, struct stats_s *stats) { char buf[14*25]; if (!opt.quiet) { log_info (_("total number processed: %lu\n"), stats->count); if (stats->imported) { log_info (_(" imported: %lu"), stats->imported ); log_printf ("\n"); } if (stats->unchanged) log_info (_(" unchanged: %lu\n"), stats->unchanged); if (stats->secret_read) log_info (_(" secret keys read: %lu\n"), stats->secret_read ); if (stats->secret_imported) log_info (_(" secret keys imported: %lu\n"), stats->secret_imported ); if (stats->secret_dups) log_info (_(" secret keys unchanged: %lu\n"), stats->secret_dups ); if (stats->not_imported) log_info (_(" not imported: %lu\n"), stats->not_imported); } sprintf(buf, "%lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", stats->count, 0l /*stats->no_user_id*/, stats->imported, 0l /*stats->imported_rsa*/, stats->unchanged, 0l /*stats->n_uids*/, 0l /*stats->n_subk*/, 0l /*stats->n_sigs*/, 0l /*stats->n_revoc*/, stats->secret_read, stats->secret_imported, stats->secret_dups, 0l /*stats->skipped_new_keys*/, stats->not_imported ); gpgsm_status (ctrl, STATUS_IMPORT_RES, buf); } static void check_and_store (CTRL ctrl, struct stats_s *stats, ksba_cert_t cert, int depth) { int rc; if (stats) stats->count++; if ( depth >= 50 ) { log_error (_("certificate chain too long\n")); if (stats) stats->not_imported++; print_import_problem (ctrl, cert, 3); return; } /* Some basic checks, but don't care about missing certificates; this is so that we are able to import entire certificate chains w/o requiring a special order (i.e. root-CA first). This used to be different but because gpgsm_verify even imports certificates without any checks, it doesn't matter much and the code gets much cleaner. A housekeeping function to remove certificates w/o an anchor would be nice, though. Optionally we do a full validation in addition to the basic test. */ rc = gpgsm_basic_cert_check (cert); if (!rc && ctrl->with_validation) rc = gpgsm_validate_chain (ctrl, cert, NULL, 0, NULL, 0); if (!rc || (!ctrl->with_validation && gpg_err_code (rc) == GPG_ERR_MISSING_CERT) ) { int existed; if (!keydb_store_cert (cert, 0, &existed)) { ksba_cert_t next = NULL; if (!existed) { print_imported_status (ctrl, cert, 1); if (stats) stats->imported++; } else { print_imported_status (ctrl, cert, 0); if (stats) stats->unchanged++; } if (opt.verbose > 1 && existed) { if (depth) log_info ("issuer certificate already in DB\n"); else log_info ("certificate already in DB\n"); } else if (opt.verbose && !existed) { if (depth) log_info ("issuer certificate imported\n"); else log_info ("certificate imported\n"); } /* Now lets walk up the chain and import all certificates up the chain. This is required in case we already stored parent certificates in the ephemeral keybox. Do not update the statistics, though. */ if (!gpgsm_walk_cert_chain (cert, &next)) { check_and_store (ctrl, NULL, next, depth+1); ksba_cert_release (next); } } else { log_error (_("error storing certificate\n")); if (stats) stats->not_imported++; print_import_problem (ctrl, cert, 4); } } else { log_error (_("basic certificate checks failed - not imported\n")); if (stats) stats->not_imported++; print_import_problem (ctrl, cert, gpg_err_code (rc) == GPG_ERR_MISSING_CERT? 2 : gpg_err_code (rc) == GPG_ERR_BAD_CERT? 1 : 0); } } static int import_one (CTRL ctrl, struct stats_s *stats, int in_fd) { int rc; Base64Context b64reader = NULL; ksba_reader_t reader; ksba_cert_t cert = NULL; ksba_cms_t cms = NULL; FILE *fp = NULL; ksba_content_type_t ct; int any = 0; fp = fdopen ( dup (in_fd), "rb"); if (!fp) { rc = gpg_error (gpg_err_code_from_errno (errno)); log_error ("fdopen() failed: %s\n", strerror (errno)); goto leave; } rc = gpgsm_create_reader (&b64reader, ctrl, fp, 1, &reader); if (rc) { log_error ("can't create reader: %s\n", gpg_strerror (rc)); goto leave; } /* We need to loop here to handle multiple PEM objects in one file. */ do { ksba_cms_release (cms); cms = NULL; ksba_cert_release (cert); cert = NULL; ct = ksba_cms_identify (reader); if (ct == KSBA_CT_SIGNED_DATA) { /* This is probably a signed-only message - import the certs */ ksba_stop_reason_t stopreason; int i; rc = ksba_cms_new (&cms); if (rc) goto leave; rc = ksba_cms_set_reader_writer (cms, reader, NULL); if (rc) { log_error ("ksba_cms_set_reader_writer failed: %s\n", gpg_strerror (rc)); goto leave; } do { rc = ksba_cms_parse (cms, &stopreason); if (rc) { log_error ("ksba_cms_parse failed: %s\n", gpg_strerror (rc)); goto leave; } if (stopreason == KSBA_SR_BEGIN_DATA) log_info ("not a certs-only message\n"); } while (stopreason != KSBA_SR_READY); for (i=0; (cert=ksba_cms_get_cert (cms, i)); i++) { check_and_store (ctrl, stats, cert, 0); ksba_cert_release (cert); cert = NULL; } if (!i) log_error ("no certificate found\n"); else any = 1; } else if (ct == KSBA_CT_PKCS12) { /* This seems to be a pkcs12 message. We use an external tool to parse the message and to store the private keys. We need to use a another reader here to parse the certificate we included in the p12 file; then we continue to look for other pkcs12 files (works only if they are in PEM format. */ FILE *certfp; Base64Context b64p12rdr; ksba_reader_t p12rdr; rc = parse_p12 (ctrl, reader, &certfp, stats); if (!rc) { any = 1; rewind (certfp); rc = gpgsm_create_reader (&b64p12rdr, ctrl, certfp, 1, &p12rdr); if (rc) { log_error ("can't create reader: %s\n", gpg_strerror (rc)); fclose (certfp); goto leave; } do { ksba_cert_release (cert); cert = NULL; rc = ksba_cert_new (&cert); if (!rc) { rc = ksba_cert_read_der (cert, p12rdr); if (!rc) check_and_store (ctrl, stats, cert, 0); } ksba_reader_clear (p12rdr, NULL, NULL); } while (!rc && !gpgsm_reader_eof_seen (b64p12rdr)); if (gpg_err_code (rc) == GPG_ERR_EOF) rc = 0; gpgsm_destroy_reader (b64p12rdr); fclose (certfp); if (rc) goto leave; } } else if (ct == KSBA_CT_NONE) { /* Failed to identify this message - assume a certificate */ rc = ksba_cert_new (&cert); if (rc) goto leave; rc = ksba_cert_read_der (cert, reader); if (rc) goto leave; check_and_store (ctrl, stats, cert, 0); any = 1; } else { log_error ("can't extract certificates from input\n"); rc = gpg_error (GPG_ERR_NO_DATA); } ksba_reader_clear (reader, NULL, NULL); } while (!gpgsm_reader_eof_seen (b64reader)); leave: if (any && gpg_err_code (rc) == GPG_ERR_EOF) rc = 0; ksba_cms_release (cms); ksba_cert_release (cert); gpgsm_destroy_reader (b64reader); if (fp) fclose (fp); return rc; } int gpgsm_import (CTRL ctrl, int in_fd) { int rc; struct stats_s stats; memset (&stats, 0, sizeof stats); rc = import_one (ctrl, &stats, in_fd); print_imported_summary (ctrl, &stats); /* If we never printed an error message do it now so that a command line invocation will return with an error (log_error keeps a global errorcount) */ if (rc && !log_get_errorcount (0)) log_error (_("error importing certificate: %s\n"), gpg_strerror (rc)); return rc; } int gpgsm_import_files (CTRL ctrl, int nfiles, char **files, int (*of)(const char *fname)) { int rc = 0; struct stats_s stats; memset (&stats, 0, sizeof stats); if (!nfiles) rc = import_one (ctrl, &stats, 0); else { for (; nfiles && !rc ; nfiles--, files++) { int fd = of (*files); rc = import_one (ctrl, &stats, fd); close (fd); if (rc == -1) rc = 0; } } print_imported_summary (ctrl, &stats); /* If we never printed an error message do it now so that a command line invocation will return with an error (log_error keeps a global errorcount) */ if (rc && !log_get_errorcount (0)) log_error (_("error importing certificate: %s\n"), gpg_strerror (rc)); return rc; } /* Fork and exec the protecttool, connect the file descriptor of INFILE to stdin, return a new stream in STATUSFILE, write the output to OUTFILE and the pid of the process in PID. Returns 0 on success or an error code. */ static gpg_error_t popen_protect_tool (const char *pgmname, FILE *infile, FILE *outfile, FILE **statusfile, pid_t *pid) { const char *argv[20]; int i=0; argv[i++] = "--homedir"; argv[i++] = opt.homedir; argv[i++] = "--p12-import"; argv[i++] = "--store"; argv[i++] = "--no-fail-on-exist"; argv[i++] = "--enable-status-msg"; if (opt.fixed_passphrase) { argv[i++] = "--passphrase"; argv[i++] = opt.fixed_passphrase; } argv[i++] = "--", argv[i] = NULL; assert (i < sizeof argv); return gnupg_spawn_process (pgmname, argv, infile, outfile, setup_pinentry_env, statusfile, pid); } /* Assume that the reader is at a pkcs#12 message and try to import certificates from that stupid format. We will also store secret keys. All of the pkcs#12 parsing and key storing is handled by the gpg-protect-tool, we merely have to take care of receiving the certificates. On success RETFP returns a temporary file with certificates. */ static gpg_error_t parse_p12 (ctrl_t ctrl, ksba_reader_t reader, FILE **retfp, struct stats_s *stats) { const char *pgmname; gpg_error_t err = 0, child_err = 0; int c, cont_line; unsigned int pos; FILE *tmpfp, *certfp = NULL, *fp = NULL; char buffer[1024]; size_t nread; pid_t pid = -1; int bad_pass = 0; if (!opt.protect_tool_program || !*opt.protect_tool_program) pgmname = GNUPG_DEFAULT_PROTECT_TOOL; else pgmname = opt.protect_tool_program; *retfp = NULL; /* To avoid an extra feeder process or doing selects and because gpg-protect-tool will anyway parse the entire pkcs#12 message in memory, we simply use tempfiles here and pass them to the gpg-protect-tool. */ tmpfp = tmpfile (); if (!tmpfp) { err = gpg_error_from_errno (errno); log_error (_("error creating temporary file: %s\n"), strerror (errno)); goto cleanup; } while (!(err = ksba_reader_read (reader, buffer, sizeof buffer, &nread))) { if (nread && fwrite (buffer, nread, 1, tmpfp) != 1) { err = gpg_error_from_errno (errno); log_error (_("error writing to temporary file: %s\n"), strerror (errno)); goto cleanup; } } if (gpg_err_code (err) == GPG_ERR_EOF) err = 0; if (err) { log_error (_("error reading input: %s\n"), gpg_strerror (err)); goto cleanup; } certfp = tmpfile (); if (!certfp) { err = gpg_error_from_errno (errno); log_error (_("error creating temporary file: %s\n"), strerror (errno)); goto cleanup; } err = popen_protect_tool (pgmname, tmpfp, certfp, &fp, &pid); if (err) { pid = -1; goto cleanup; } fclose (tmpfp); tmpfp = NULL; /* Read stderr of the protect tool. */ pos = 0; cont_line = 0; while ((c=getc (fp)) != EOF) { /* fixme: We could here grep for status information of the protect tool to figure out better error codes for CHILD_ERR. */ buffer[pos++] = c; if (pos >= sizeof buffer - 5 || c == '\n') { buffer[pos - (c == '\n')] = 0; if (cont_line) log_printf ("%s", buffer); else { if (!strncmp (buffer, "gpg-protect-tool: [PROTECT-TOOL:] ",34)) { char *p, *pend; p = buffer + 34; pend = strchr (p, ' '); if (pend) *pend = 0; if ( !strcmp (p, "secretkey-stored")) { stats->count++; stats->secret_read++; stats->secret_imported++; } else if ( !strcmp (p, "secretkey-exists")) { stats->count++; stats->secret_read++; stats->secret_dups++; } else if ( !strcmp (p, "bad-passphrase")) ; } else { log_info ("%s", buffer); if (!strncmp (buffer, "gpg-protect-tool: " "possibly bad passphrase given",46)) bad_pass++; } } pos = 0; cont_line = (c != '\n'); } } if (pos) { buffer[pos] = 0; if (cont_line) log_printf ("%s\n", buffer); else log_info ("%s\n", buffer); } /* If we found no error in the output of the cild, setup a suitable error code, which will later be reset if the exit status of the child is 0. */ if (!child_err) child_err = gpg_error (GPG_ERR_DECRYPT_FAILED); cleanup: if (tmpfp) fclose (tmpfp); if (fp) fclose (fp); if (pid != -1) { if (!gnupg_wait_process (pgmname, pid)) child_err = 0; } if (!err) err = child_err; if (err) { if (certfp) fclose (certfp); } else *retfp = certfp; if (bad_pass) { /* We only write a plain error code and not direct BAD_PASSPHRASE because the pkcs12 parser might issue this message multiple times, BAd_PASSPHRASE in general requires a keyID and parts of the import might actually succeed so that IMPORT_PROBLEM is also not appropriate. */ gpgsm_status_with_err_code (ctrl, STATUS_ERROR, "import.parsep12", GPG_ERR_BAD_PASSPHRASE); } return err; }