/* Write an S-expression formatted key to our key storage. With FORCE passed as true an existing key with the given GRIP will get overwritten. */ int agent_write_private_key (const unsigned char *grip, const void *buffer, size_t length, int force) { char *fname; estream_t fp; char hexgrip[40+4+1]; bin2hex (grip, 20, hexgrip); strcpy (hexgrip+40, ".key"); fname = make_filename (opt.homedir, GNUPG_PRIVATE_KEYS_DIR, hexgrip, NULL); /* FIXME: Write to a temp file first so that write failures during key updates won't lead to a key loss. */ if (!force && !access (fname, F_OK)) { log_error ("secret key file '%s' already exists\n", fname); xfree (fname); return gpg_error (GPG_ERR_EEXIST); } fp = es_fopen (fname, force? "wb,mode=-rw" : "wbx,mode=-rw"); if (!fp) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("can't create '%s': %s\n", fname, gpg_strerror (tmperr)); xfree (fname); return tmperr; } if (es_fwrite (buffer, length, 1, fp) != 1) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("error writing '%s': %s\n", fname, gpg_strerror (tmperr)); es_fclose (fp); gnupg_remove (fname); xfree (fname); return tmperr; } if (es_fclose (fp)) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("error closing '%s': %s\n", fname, gpg_strerror (tmperr)); gnupg_remove (fname); xfree (fname); return tmperr; } bump_key_eventcounter (); xfree (fname); return 0; }
/* Write the RECORD of size RECORDSIZE to STREAM. FILENAME is the name of the file used for diagnostics. */ gpg_error_t write_record (estream_t stream, const void *record) { gpg_error_t err; size_t nwritten; nwritten = es_fwrite (record, 1, RECORDSIZE, stream); if (nwritten != RECORDSIZE) { err = gpg_error_from_syserror (); log_error ("error writing '%s': %s\n", es_fname_get (stream), gpg_strerror (err)); } else err = 0; return err; }
/* Construct an OCSP request, send it to the configured OCSP responder and parse the response. On success the OCSP context may be used to further process the reponse. */ static gpg_error_t do_ocsp_request (ctrl_t ctrl, ksba_ocsp_t ocsp, gcry_md_hd_t md, const char *url, ksba_cert_t cert, ksba_cert_t issuer_cert) { gpg_error_t err; unsigned char *request, *response; size_t requestlen, responselen; http_t http; ksba_ocsp_response_status_t response_status; const char *t; int redirects_left = 2; char *free_this = NULL; (void)ctrl; if (opt.disable_http) { log_error (_("OCSP request not possible due to disabled HTTP\n")); return gpg_error (GPG_ERR_NOT_SUPPORTED); } err = ksba_ocsp_add_target (ocsp, cert, issuer_cert); if (err) { log_error (_("error setting OCSP target: %s\n"), gpg_strerror (err)); return err; } { size_t n; unsigned char nonce[32]; n = ksba_ocsp_set_nonce (ocsp, NULL, 0); if (n > sizeof nonce) n = sizeof nonce; gcry_create_nonce (nonce, n); ksba_ocsp_set_nonce (ocsp, nonce, n); } err = ksba_ocsp_build_request (ocsp, &request, &requestlen); if (err) { log_error (_("error building OCSP request: %s\n"), gpg_strerror (err)); return err; } once_more: err = http_open (&http, HTTP_REQ_POST, url, NULL, (opt.honor_http_proxy? HTTP_FLAG_TRY_PROXY:0), opt.http_proxy, NULL, NULL, NULL); if (err) { log_error (_("error connecting to '%s': %s\n"), url, gpg_strerror (err)); xfree (free_this); return err; } es_fprintf (http_get_write_ptr (http), "Content-Type: application/ocsp-request\r\n" "Content-Length: %lu\r\n", (unsigned long)requestlen ); http_start_data (http); if (es_fwrite (request, requestlen, 1, http_get_write_ptr (http)) != 1) { err = gpg_error_from_errno (errno); log_error ("error sending request to '%s': %s\n", url, strerror (errno)); http_close (http, 0); xfree (request); xfree (free_this); return err; } xfree (request); request = NULL; err = http_wait_response (http); if (err || http_get_status_code (http) != 200) { if (err) log_error (_("error reading HTTP response for '%s': %s\n"), url, gpg_strerror (err)); else { switch (http_get_status_code (http)) { case 301: case 302: { const char *s = http_get_header (http, "Location"); log_info (_("URL '%s' redirected to '%s' (%u)\n"), url, s?s:"[none]", http_get_status_code (http)); if (s && *s && redirects_left-- ) { xfree (free_this); url = NULL; free_this = xtrystrdup (s); if (!free_this) err = gpg_error_from_errno (errno); else { url = free_this; http_close (http, 0); goto once_more; } } else err = gpg_error (GPG_ERR_NO_DATA); log_error (_("too many redirections\n")); } break; default: log_error (_("error accessing '%s': http status %u\n"), url, http_get_status_code (http)); err = gpg_error (GPG_ERR_NO_DATA); break; } } http_close (http, 0); xfree (free_this); return err; } err = read_response (http_get_read_ptr (http), &response, &responselen); http_close (http, 0); if (err) { log_error (_("error reading HTTP response for '%s': %s\n"), url, gpg_strerror (err)); xfree (free_this); return err; } err = ksba_ocsp_parse_response (ocsp, response, responselen, &response_status); if (err) { log_error (_("error parsing OCSP response for '%s': %s\n"), url, gpg_strerror (err)); xfree (response); xfree (free_this); return err; } switch (response_status) { case KSBA_OCSP_RSPSTATUS_SUCCESS: t = "success"; break; case KSBA_OCSP_RSPSTATUS_MALFORMED: t = "malformed"; break; case KSBA_OCSP_RSPSTATUS_INTERNAL: t = "internal error"; break; case KSBA_OCSP_RSPSTATUS_TRYLATER: t = "try later"; break; case KSBA_OCSP_RSPSTATUS_SIGREQUIRED: t = "must sign request"; break; case KSBA_OCSP_RSPSTATUS_UNAUTHORIZED: t = "unauthorized"; break; case KSBA_OCSP_RSPSTATUS_REPLAYED: t = "replay detected"; break; case KSBA_OCSP_RSPSTATUS_OTHER: t = "other (unknown)"; break; case KSBA_OCSP_RSPSTATUS_NONE: t = "no status"; break; default: t = "[unknown status]"; break; } if (response_status == KSBA_OCSP_RSPSTATUS_SUCCESS) { if (opt.verbose) log_info (_("OCSP responder at '%s' status: %s\n"), url, t); err = ksba_ocsp_hash_response (ocsp, response, responselen, HASH_FNC, md); if (err) log_error (_("hashing the OCSP response for '%s' failed: %s\n"), url, gpg_strerror (err)); } else { log_error (_("OCSP responder at '%s' status: %s\n"), url, t); err = gpg_error (GPG_ERR_GENERAL); } xfree (response); xfree (free_this); return err; }
/* * Write a status line with a buffer using %XX escapes. If WRAP is > * 0 wrap the line after this length. If STRING is not NULL it will * be prepended to the buffer, no escaping is done for string. * A wrap of -1 forces spaces not to be encoded as %20. */ void write_status_text_and_buffer (int no, const char *string, const char *buffer, size_t len, int wrap) { const char *s, *text; int esc, first; int lower_limit = ' '; size_t n, count, dowrap; if (!statusfp || !status_currently_allowed (no)) return; /* Not enabled or allowed. */ if (wrap == -1) { lower_limit--; wrap = 0; } text = get_status_string (no); count = dowrap = first = 1; do { if (dowrap) { es_fprintf (statusfp, "[GNUPG:] %s ", text); count = dowrap = 0; if (first && string) { es_fputs (string, statusfp); count += strlen (string); /* Make sure that there is a space after the string. */ if (*string && string[strlen (string)-1] != ' ') { es_putc (' ', statusfp); count++; } } first = 0; } for (esc=0, s=buffer, n=len; n && !esc; s++, n--) { if (*s == '%' || *(const byte*)s <= lower_limit || *(const byte*)s == 127 ) esc = 1; if (wrap && ++count > wrap) { dowrap=1; break; } } if (esc) { s--; n++; } if (s != buffer) es_fwrite (buffer, s-buffer, 1, statusfp); if ( esc ) { es_fprintf (statusfp, "%%%02X", *(const byte*)s ); s++; n--; } buffer = s; len = n; if (dowrap && len) es_putc ('\n', statusfp); } while (len); es_putc ('\n',statusfp); if (es_fflush (statusfp) && opt.exit_on_status_write_error) g10_exit (0); }
/* Write an S-expression formatted key to our key storage. With FORCE passed as true an existing key with the given GRIP will get overwritten. */ int agent_write_private_key (const unsigned char *grip, const void *buffer, size_t length, int force) { char *fname; estream_t fp; char hexgrip[40+4+1]; bin2hex (grip, 20, hexgrip); strcpy (hexgrip+40, ".key"); fname = make_filename (opt.homedir, GNUPG_PRIVATE_KEYS_DIR, hexgrip, NULL); /* FIXME: Write to a temp file first so that write failures during key updates won't lead to a key loss. */ if (!force && !access (fname, F_OK)) { log_error ("secret key file '%s' already exists\n", fname); xfree (fname); return gpg_error (GPG_ERR_EEXIST); } fp = es_fopen (fname, force? "rb+,mode=-rw" : "wbx,mode=-rw"); if (!fp) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("can't create '%s': %s\n", fname, gpg_strerror (tmperr)); xfree (fname); return tmperr; } /* See if an existing key is in extended format. */ if (force) { gpg_error_t rc; char first; if (es_fread (&first, 1, 1, fp) != 1) { rc = gpg_error_from_syserror (); log_error ("error reading first byte from '%s': %s\n", fname, strerror (errno)); xfree (fname); es_fclose (fp); return rc; } rc = es_fseek (fp, 0, SEEK_SET); if (rc) { log_error ("error seeking in '%s': %s\n", fname, strerror (errno)); xfree (fname); es_fclose (fp); return rc; } if (first != '(') { /* Key is in extended format. */ return write_extended_private_key (fname, fp, buffer, length); } } if (es_fwrite (buffer, length, 1, fp) != 1) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("error writing '%s': %s\n", fname, gpg_strerror (tmperr)); es_fclose (fp); gnupg_remove (fname); xfree (fname); return tmperr; } /* When force is given, the file might have to be truncated. */ if (force && ftruncate (es_fileno (fp), es_ftello (fp))) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("error truncating '%s': %s\n", fname, gpg_strerror (tmperr)); es_fclose (fp); gnupg_remove (fname); xfree (fname); return tmperr; } if (es_fclose (fp)) { gpg_error_t tmperr = gpg_error_from_syserror (); log_error ("error closing '%s': %s\n", fname, gpg_strerror (tmperr)); gnupg_remove (fname); xfree (fname); return tmperr; } bump_key_eventcounter (); xfree (fname); return 0; }