/* card-util.c - Utility functions for the OpenPGP card. * Copyright (C) 2003, 2004, 2005, 2009 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 3 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, see . */ #include #include #include #include #include #include #ifdef HAVE_LIBREADLINE # define GNUPG_LIBREADLINE_H_INCLUDED # include #endif /*HAVE_LIBREADLINE*/ #if GNUPG_MAJOR_VERSION != 1 # include "gpg.h" #endif /*GNUPG_MAJOR_VERSION != 1*/ #include "util.h" #include "i18n.h" #include "ttyio.h" #include "status.h" #include "options.h" #include "main.h" #include "keyserver-internal.h" #if GNUPG_MAJOR_VERSION == 1 # include "cardglue.h" #else /*GNUPG_MAJOR_VERSION!=1*/ # include "call-agent.h" #endif /*GNUPG_MAJOR_VERSION!=1*/ #define CONTROL_D ('D' - 'A' + 1) static void write_sc_op_status (gpg_error_t err) { switch (gpg_err_code (err)) { case 0: write_status (STATUS_SC_OP_SUCCESS); break; #if GNUPG_MAJOR_VERSION != 1 case GPG_ERR_CANCELED: write_status_text (STATUS_SC_OP_FAILURE, "1"); break; case GPG_ERR_BAD_PIN: write_status_text (STATUS_SC_OP_FAILURE, "2"); break; default: write_status (STATUS_SC_OP_FAILURE); break; #endif /* GNUPG_MAJOR_VERSION != 1 */ } } /* Change the PIN of a an OpenPGP card. This is an interactive function. */ void change_pin (int unblock_v2, int allow_admin) { struct agent_card_info_s info; int rc; rc = agent_learn (&info); if (rc) { log_error (_("OpenPGP card not available: %s\n"), gpg_strerror (rc)); return; } log_info (_("OpenPGP card no. %s detected\n"), info.serialno? info.serialno : "[none]"); agent_clear_pin_cache (info.serialno); if (opt.batch) { agent_release_card_info (&info); log_error (_("can't do this in batch mode\n")); return; } if (unblock_v2) { if (!info.is_v2) log_error (_("This command is only available for version 2 cards\n")); else if (!info.chvretry[1]) log_error (_("Reset Code not or not anymore available\n")); else { rc = agent_scd_change_pin (2, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } } else if (!allow_admin) { rc = agent_scd_change_pin (1, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } else for (;;) { char *answer; tty_printf ("\n"); tty_printf ("1 - change PIN\n" "2 - unblock PIN\n" "3 - change Admin PIN\n" "4 - set the Reset Code\n" "Q - quit\n"); tty_printf ("\n"); answer = cpr_get("cardutil.change_pin.menu",_("Your selection? ")); cpr_kill_prompt(); if (strlen (answer) != 1) continue; rc = 0; if (*answer == '1') { /* Change PIN. */ rc = agent_scd_change_pin (1, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } else if (*answer == '2') { /* Unblock PIN. */ rc = agent_scd_change_pin (101, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error unblocking the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN unblocked and new PIN set.\n"); } else if (*answer == '3') { /* Change Admin PIN. */ rc = agent_scd_change_pin (3, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error changing the PIN: %s\n", gpg_strerror (rc)); else tty_printf ("PIN changed.\n"); } else if (*answer == '4') { /* Set a new Reset Code. */ rc = agent_scd_change_pin (102, info.serialno); write_sc_op_status (rc); if (rc) tty_printf ("Error setting the Reset Code: %s\n", gpg_strerror (rc)); else tty_printf ("Reset Code set.\n"); } else if (*answer == 'q' || *answer == 'Q') { break; } } agent_release_card_info (&info); } static const char * get_manufacturer (unsigned int no) { /* Note: Make sure that there is no colon or linefeed in the string. */ switch (no) { case 0x0001: return "PPC Card Systems"; case 0x0002: return "Prism"; case 0x0003: return "OpenFortress"; case 0x0004: return "Wewid AB"; case 0x0005: return "ZeitControl"; case 0x002A: return "Magrathea"; case 0xF517: return "FSIJ"; /* 0x00000 and 0xFFFF are defined as test cards per spec, 0xFFF00 to 0xFFFE are assigned for use with randomly created serial numbers. */ case 0x0000: case 0xffff: return "test card"; default: return (no & 0xff00) == 0xff00? "unmanaged S/N range":"unknown"; } } static void print_sha1_fpr (FILE *fp, const unsigned char *fpr) { int i; if (fpr) { for (i=0; i < 20 ; i+=2, fpr += 2 ) { if (i == 10 ) tty_fprintf (fp, " "); tty_fprintf (fp, " %02X%02X", *fpr, fpr[1]); } } else tty_fprintf (fp, " [none]"); tty_fprintf (fp, "\n"); } static void print_sha1_fpr_colon (FILE *fp, const unsigned char *fpr) { int i; if (fpr) { for (i=0; i < 20 ; i++, fpr++) fprintf (fp, "%02X", *fpr); } putc (':', fp); } static void print_name (FILE *fp, const char *text, const char *name) { tty_fprintf (fp, "%s", text); /* FIXME: tty_printf_utf8_string2 eats everything after and including an @ - e.g. when printing an url. */ if (name && *name) { if (fp) print_utf8_string2 (fp, name, strlen (name), '\n'); else tty_print_utf8_string2 (name, strlen (name), 0); } else tty_fprintf (fp, _("[not set]")); tty_fprintf (fp, "\n"); } static void print_isoname (FILE *fp, const char *text, const char *tag, const char *name) { if (opt.with_colons) fprintf (fp, "%s:", tag); else tty_fprintf (fp, "%s", text); if (name && *name) { char *p, *given, *buf = xstrdup (name); given = strstr (buf, "<<"); for (p=buf; *p; p++) if (*p == '<') *p = ' '; if (given && given[2]) { *given = 0; given += 2; if (opt.with_colons) print_string (fp, given, strlen (given), ':'); else if (fp) print_utf8_string2 (fp, given, strlen (given), '\n'); else tty_print_utf8_string2 (given, strlen (given), 0); if (opt.with_colons) putc (':', fp); else if (*buf) tty_fprintf (fp, " "); } if (opt.with_colons) print_string (fp, buf, strlen (buf), ':'); else if (fp) print_utf8_string2 (fp, buf, strlen (buf), '\n'); else tty_print_utf8_string2 (buf, strlen (buf), 0); xfree (buf); } else { if (opt.with_colons) putc (':', fp); else tty_fprintf (fp, _("[not set]")); } if (opt.with_colons) fputs (":\n", fp); else tty_fprintf (fp, "\n"); } /* Return true if the SHA1 fingerprint FPR consists only of zeroes. */ static int fpr_is_zero (const char *fpr) { int i; for (i=0; i < 20 && !fpr[i]; i++) ; return (i == 20); } /* Return true if the SHA1 fingerprint FPR consists only of 0xFF. */ static int fpr_is_ff (const char *fpr) { int i; for (i=0; i < 20 && fpr[i] == '\xff'; i++) ; return (i == 20); } /* Print all available information about the current card. */ void card_status (FILE *fp, char *serialno, size_t serialnobuflen) { struct agent_card_info_s info; PKT_public_key *pk = xcalloc (1, sizeof *pk); int rc; unsigned int uval; const unsigned char *thefpr; int i; if (serialno && serialnobuflen) *serialno = 0; rc = agent_learn (&info); if (rc) { if (opt.with_colons) fputs ("AID:::\n", fp); log_error (_("OpenPGP card not available: %s\n"), gpg_strerror (rc)); xfree (pk); return; } if (opt.with_colons) fprintf (fp, "AID:%s:", info.serialno? info.serialno : ""); else tty_fprintf (fp, "Application ID ...: %s\n", info.serialno? info.serialno : "[none]"); if (!info.serialno || strncmp (info.serialno, "D27600012401", 12) || strlen (info.serialno) != 32 ) { if (info.apptype && !strcmp (info.apptype, "NKS")) { if (opt.with_colons) fputs ("netkey-card:\n", fp); log_info ("this is a NetKey card\n"); } else if (info.apptype && !strcmp (info.apptype, "DINSIG")) { if (opt.with_colons) fputs ("dinsig-card:\n", fp); log_info ("this is a DINSIG compliant card\n"); } else if (info.apptype && !strcmp (info.apptype, "P15")) { if (opt.with_colons) fputs ("pkcs15-card:\n", fp); log_info ("this is a PKCS#15 compliant card\n"); } else if (info.apptype && !strcmp (info.apptype, "GELDKARTE")) { if (opt.with_colons) fputs ("geldkarte-card:\n", fp); log_info ("this is a Geldkarte compliant card\n"); } else { if (opt.with_colons) fputs ("unknown:\n", fp); } log_info ("not an OpenPGP card\n"); agent_release_card_info (&info); xfree (pk); return; } if (!serialno) ; else if (strlen (serialno)+1 > serialnobuflen) log_error ("serial number longer than expected\n"); else strcpy (serialno, info.serialno); if (opt.with_colons) fputs ("openpgp-card:\n", fp); if (opt.with_colons) { fprintf (fp, "version:%.4s:\n", info.serialno+12); uval = xtoi_2(info.serialno+16)*256 + xtoi_2 (info.serialno+18); fprintf (fp, "vendor:%04x:%s:\n", uval, get_manufacturer (uval)); fprintf (fp, "serial:%.8s:\n", info.serialno+20); print_isoname (fp, "Name of cardholder: ", "name", info.disp_name); fputs ("lang:", fp); if (info.disp_lang) print_string (fp, info.disp_lang, strlen (info.disp_lang), ':'); fputs (":\n", fp); fprintf (fp, "sex:%c:\n", (info.disp_sex == 1? 'm': info.disp_sex == 2? 'f' : 'u')); fputs ("url:", fp); if (info.pubkey_url) print_string (fp, info.pubkey_url, strlen (info.pubkey_url), ':'); fputs (":\n", fp); fputs ("login:", fp); if (info.login_data) print_string (fp, info.login_data, strlen (info.login_data), ':'); fputs (":\n", fp); fprintf (fp, "forcepin:%d:::\n", !info.chv1_cached); for (i=0; i < DIM (info.key_attr); i++) if (info.key_attr[0].algo) fprintf (fp, "keyattr:%d:%d:%u:\n", i+1, info.key_attr[i].algo, info.key_attr[i].nbits); fprintf (fp, "maxpinlen:%d:%d:%d:\n", info.chvmaxlen[0], info.chvmaxlen[1], info.chvmaxlen[2]); fprintf (fp, "pinretry:%d:%d:%d:\n", info.chvretry[0], info.chvretry[1], info.chvretry[2]); fprintf (fp, "sigcount:%lu:::\n", info.sig_counter); for (i=0; i < 4; i++) { if (info.private_do[i]) { fprintf (fp, "private_do:%d:", i+1); print_string (fp, info.private_do[i], strlen (info.private_do[i]), ':'); fputs (":\n", fp); } } fputs ("cafpr:", fp); print_sha1_fpr_colon (fp, info.cafpr1valid? info.cafpr1:NULL); print_sha1_fpr_colon (fp, info.cafpr2valid? info.cafpr2:NULL); print_sha1_fpr_colon (fp, info.cafpr3valid? info.cafpr3:NULL); putc ('\n', fp); fputs ("fpr:", fp); print_sha1_fpr_colon (fp, info.fpr1valid? info.fpr1:NULL); print_sha1_fpr_colon (fp, info.fpr2valid? info.fpr2:NULL); print_sha1_fpr_colon (fp, info.fpr3valid? info.fpr3:NULL); putc ('\n', fp); fprintf (fp, "fprtime:%lu:%lu:%lu:\n", (unsigned long)info.fpr1time, (unsigned long)info.fpr2time, (unsigned long)info.fpr3time); } else { tty_fprintf (fp, "Version ..........: %.1s%c.%.1s%c\n", info.serialno[12] == '0'?"":info.serialno+12, info.serialno[13], info.serialno[14] == '0'?"":info.serialno+14, info.serialno[15]); tty_fprintf (fp, "Manufacturer .....: %s\n", get_manufacturer (xtoi_2(info.serialno+16)*256 + xtoi_2 (info.serialno+18))); tty_fprintf (fp, "Serial number ....: %.8s\n", info.serialno+20); print_isoname (fp, "Name of cardholder: ", "name", info.disp_name); print_name (fp, "Language prefs ...: ", info.disp_lang); tty_fprintf (fp, "Sex ..............: %s\n", info.disp_sex == 1? _("male"): info.disp_sex == 2? _("female") : _("unspecified")); print_name (fp, "URL of public key : ", info.pubkey_url); print_name (fp, "Login data .......: ", info.login_data); if (info.private_do[0]) print_name (fp, "Private DO 1 .....: ", info.private_do[0]); if (info.private_do[1]) print_name (fp, "Private DO 2 .....: ", info.private_do[1]); if (info.private_do[2]) print_name (fp, "Private DO 3 .....: ", info.private_do[2]); if (info.private_do[3]) print_name (fp, "Private DO 4 .....: ", info.private_do[3]); if (info.cafpr1valid) { tty_fprintf (fp, "CA fingerprint %d .:", 1); print_sha1_fpr (fp, info.cafpr1); } if (info.cafpr2valid) { tty_fprintf (fp, "CA fingerprint %d .:", 2); print_sha1_fpr (fp, info.cafpr2); } if (info.cafpr3valid) { tty_fprintf (fp, "CA fingerprint %d .:", 3); print_sha1_fpr (fp, info.cafpr3); } tty_fprintf (fp, "Signature PIN ....: %s\n", info.chv1_cached? _("not forced"): _("forced")); if (info.key_attr[0].algo) { tty_fprintf (fp, "Key attributes ...:"); for (i=0; i < DIM (info.key_attr); i++) tty_fprintf (fp, " %u%c", info.key_attr[i].nbits, info.key_attr[i].algo == 1? 'R': info.key_attr[i].algo == 17? 'D': '?'); tty_fprintf (fp, "\n"); } tty_fprintf (fp, "Max. PIN lengths .: %d %d %d\n", info.chvmaxlen[0], info.chvmaxlen[1], info.chvmaxlen[2]); tty_fprintf (fp, "PIN retry counter : %d %d %d\n", info.chvretry[0], info.chvretry[1], info.chvretry[2]); tty_fprintf (fp, "Signature counter : %lu\n", info.sig_counter); tty_fprintf (fp, "Signature key ....:"); print_sha1_fpr (fp, info.fpr1valid? info.fpr1:NULL); if (info.fpr1valid && info.fpr1time) tty_fprintf (fp, " created ....: %s\n", isotimestamp (info.fpr1time)); tty_fprintf (fp, "Encryption key....:"); print_sha1_fpr (fp, info.fpr2valid? info.fpr2:NULL); if (info.fpr2valid && info.fpr2time) tty_fprintf (fp, " created ....: %s\n", isotimestamp (info.fpr2time)); tty_fprintf (fp, "Authentication key:"); print_sha1_fpr (fp, info.fpr3valid? info.fpr3:NULL); if (info.fpr3valid && info.fpr3time) tty_fprintf (fp, " created ....: %s\n", isotimestamp (info.fpr3time)); tty_fprintf (fp, "General key info..: "); thefpr = (info.fpr1valid? info.fpr1 : info.fpr2valid? info.fpr2 : info.fpr3valid? info.fpr3 : NULL); /* If the fingerprint is all 0xff, the key has no asssociated OpenPGP certificate. */ if ( thefpr && !fpr_is_ff (thefpr) && !get_pubkey_byfprint (pk, thefpr, 20)) { KBNODE keyblock = NULL; print_pubkey_info (fp, pk); if ( !get_seckeyblock_byfprint (&keyblock, thefpr, 20) ) print_card_key_info (fp, keyblock); else if ( !get_keyblock_byfprint (&keyblock, thefpr, 20) ) { release_kbnode (keyblock); keyblock = NULL; if (!auto_create_card_key_stub (info.serialno, info.fpr1valid? info.fpr1:NULL, info.fpr2valid? info.fpr2:NULL, info.fpr3valid? info.fpr3:NULL)) { if ( !get_seckeyblock_byfprint (&keyblock, thefpr, 20) ) print_card_key_info (fp, keyblock); } } release_kbnode (keyblock); } else tty_fprintf (fp, "[none]\n"); } free_public_key (pk); agent_release_card_info (&info); } static char * get_one_name (const char *prompt1, const char *prompt2) { char *name; int i; for (;;) { name = cpr_get (prompt1, prompt2); if (!name) return NULL; trim_spaces (name); cpr_kill_prompt (); for (i=0; name[i] && name[i] >= ' ' && name[i] <= 126; i++) ; /* The name must be in Latin-1 and not UTF-8 - lacking the code to ensure this we restrict it to ASCII. */ if (name[i]) tty_printf (_("Error: Only plain ASCII is currently allowed.\n")); else if (strchr (name, '<')) tty_printf (_("Error: The \"<\" character may not be used.\n")); else if (strstr (name, " ")) tty_printf (_("Error: Double spaces are not allowed.\n")); else return name; xfree (name); } } static int change_name (void) { char *surname = NULL, *givenname = NULL; char *isoname, *p; int rc; surname = get_one_name ("keygen.smartcard.surname", _("Cardholder's surname: ")); givenname = get_one_name ("keygen.smartcard.givenname", _("Cardholder's given name: ")); if (!surname || !givenname || (!*surname && !*givenname)) { xfree (surname); xfree (givenname); return -1; /*canceled*/ } isoname = xmalloc ( strlen (surname) + 2 + strlen (givenname) + 1); strcpy (stpcpy (stpcpy (isoname, surname), "<<"), givenname); xfree (surname); xfree (givenname); for (p=isoname; *p; p++) if (*p == ' ') *p = '<'; if (strlen (isoname) > 39 ) { tty_printf (_("Error: Combined name too long " "(limit is %d characters).\n"), 39); xfree (isoname); return -1; } rc = agent_scd_setattr ("DISP-NAME", isoname, strlen (isoname), NULL ); if (rc) log_error ("error setting Name: %s\n", gpg_strerror (rc)); xfree (isoname); return rc; } static int change_url (void) { char *url; int rc; url = cpr_get ("cardedit.change_url", _("URL to retrieve public key: ")); if (!url) return -1; trim_spaces (url); cpr_kill_prompt (); if (strlen (url) > 254 ) { tty_printf (_("Error: URL too long " "(limit is %d characters).\n"), 254); xfree (url); return -1; } rc = agent_scd_setattr ("PUBKEY-URL", url, strlen (url), NULL ); if (rc) log_error ("error setting URL: %s\n", gpg_strerror (rc)); xfree (url); write_sc_op_status (rc); return rc; } /* Fetch the key from the URL given on the card or try to get it from the default keyserver. */ static int fetch_url(void) { int rc; struct agent_card_info_s info; memset(&info,0,sizeof(info)); rc=agent_scd_getattr("PUBKEY-URL",&info); if(rc) log_error("error retrieving URL from card: %s\n",gpg_strerror(rc)); else { struct keyserver_spec *spec=NULL; rc=agent_scd_getattr("KEY-FPR",&info); if(rc) log_error("error retrieving key fingerprint from card: %s\n", gpg_strerror(rc)); else if (info.pubkey_url && *info.pubkey_url) { spec=parse_keyserver_uri(info.pubkey_url,1,NULL,0); if(spec && info.fpr1valid) { /* This is not perfectly right. Currently, all card fingerprints are 20 digits, but what about fingerprints for a future v5 key? We should get the length from somewhere lower in the code. In any event, the fpr/keyid is not meaningful for straight HTTP fetches, but using it allows the card to point to HKP and LDAP servers as well. */ rc=keyserver_import_fprint(info.fpr1,20,spec); free_keyserver_spec(spec); } } else if (info.fpr1valid) { rc = keyserver_import_fprint (info.fpr1, 20, opt.keyserver); } } return rc; } /* Read data from file FNAME up to MAXLEN characters. On error return -1 and store NULL at R_BUFFER; on success return the number of bytes read and store the address of a newly allocated buffer at R_BUFFER. */ static int get_data_from_file (const char *fname, size_t maxlen, char **r_buffer) { FILE *fp; char *data; int n; *r_buffer = NULL; fp = fopen (fname, "rb"); #if GNUPG_MAJOR_VERSION == 1 if (fp && is_secured_file (fileno (fp))) { fclose (fp); fp = NULL; errno = EPERM; } #endif if (!fp) { tty_printf (_("can't open `%s': %s\n"), fname, strerror (errno)); return -1; } data = xtrymalloc (maxlen? maxlen:1); if (!data) { tty_printf (_("error allocating enough memory: %s\n"), strerror (errno)); fclose (fp); return -1; } if (maxlen) n = fread (data, 1, maxlen, fp); else n = 0; fclose (fp); if (n < 0) { tty_printf (_("error reading `%s': %s\n"), fname, strerror (errno)); xfree (data); return -1; } *r_buffer = data; return n; } /* Write LENGTH bytes from BUFFER to file FNAME. Return 0 on success. */ static int put_data_to_file (const char *fname, const void *buffer, size_t length) { FILE *fp; fp = fopen (fname, "wb"); #if GNUPG_MAJOR_VERSION == 1 if (fp && is_secured_file (fileno (fp))) { fclose (fp); fp = NULL; errno = EPERM; } #endif if (!fp) { tty_printf (_("can't create `%s': %s\n"), fname, strerror (errno)); return -1; } if (length && fwrite (buffer, length, 1, fp) != 1) { tty_printf (_("error writing `%s': %s\n"), fname, strerror (errno)); fclose (fp); return -1; } fclose (fp); return 0; } static int change_login (const char *args) { char *data; int n; int rc; if (args && *args == '<') /* Read it from a file */ { for (args++; spacep (args); args++) ; n = get_data_from_file (args, 254, &data); if (n < 0) return -1; } else { data = cpr_get ("cardedit.change_login", _("Login data (account name): ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); n = strlen (data); } if (n > 254 ) { tty_printf (_("Error: Login data too long " "(limit is %d characters).\n"), 254); xfree (data); return -1; } rc = agent_scd_setattr ("LOGIN-DATA", data, n, NULL ); if (rc) log_error ("error setting login data: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_private_do (const char *args, int nr) { char do_name[] = "PRIVATE-DO-X"; char *data; int n; int rc; assert (nr >= 1 && nr <= 4); do_name[11] = '0' + nr; if (args && (args = strchr (args, '<'))) /* Read it from a file */ { for (args++; spacep (args); args++) ; n = get_data_from_file (args, 254, &data); if (n < 0) return -1; } else { data = cpr_get ("cardedit.change_private_do", _("Private DO data: ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); n = strlen (data); } if (n > 254 ) { tty_printf (_("Error: Private DO too long " "(limit is %d characters).\n"), 254); xfree (data); return -1; } rc = agent_scd_setattr (do_name, data, n, NULL ); if (rc) log_error ("error setting private DO: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_cert (const char *args) { char *data; int n; int rc; if (args && *args == '<') /* Read it from a file */ { for (args++; spacep (args); args++) ; n = get_data_from_file (args, 16384, &data); if (n < 0) return -1; } else { tty_printf ("usage error: redirection to file required\n"); return -1; } rc = agent_scd_writecert ("OPENPGP.3", data, n); if (rc) log_error ("error writing certificate to card: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int read_cert (const char *args) { const char *fname; void *buffer; size_t length; int rc; if (args && *args == '>') /* Write it to a file */ { for (args++; spacep (args); args++) ; fname = args; } else { tty_printf ("usage error: redirection to file required\n"); return -1; } rc = agent_scd_readcert ("OPENPGP.3", &buffer, &length); if (rc) log_error ("error reading certificate from card: %s\n", gpg_strerror (rc)); else rc = put_data_to_file (fname, buffer, length); xfree (buffer); write_sc_op_status (rc); return rc; } static int change_lang (void) { char *data, *p; int rc; data = cpr_get ("cardedit.change_lang", _("Language preferences: ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); if (strlen (data) > 8 || (strlen (data) & 1)) { tty_printf (_("Error: invalid length of preference string.\n")); xfree (data); return -1; } for (p=data; *p && *p >= 'a' && *p <= 'z'; p++) ; if (*p) { tty_printf (_("Error: invalid characters in preference string.\n")); xfree (data); return -1; } rc = agent_scd_setattr ("DISP-LANG", data, strlen (data), NULL ); if (rc) log_error ("error setting lang: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_sex (void) { char *data; const char *str; int rc; data = cpr_get ("cardedit.change_sex", _("Sex ((M)ale, (F)emale or space): ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); if (!*data) str = "9"; else if ((*data == 'M' || *data == 'm') && !data[1]) str = "1"; else if ((*data == 'F' || *data == 'f') && !data[1]) str = "2"; else { tty_printf (_("Error: invalid response.\n")); xfree (data); return -1; } rc = agent_scd_setattr ("DISP-SEX", str, 1, NULL ); if (rc) log_error ("error setting sex: %s\n", gpg_strerror (rc)); xfree (data); write_sc_op_status (rc); return rc; } static int change_cafpr (int fprno) { char *data; const char *s; int i, c, rc; unsigned char fpr[20]; data = cpr_get ("cardedit.change_cafpr", _("CA fingerprint: ")); if (!data) return -1; trim_spaces (data); cpr_kill_prompt (); for (i=0, s=data; i < 20 && *s; ) { while (spacep(s)) s++; if (*s == ':') s++; while (spacep(s)) s++; c = hextobyte (s); if (c == -1) break; fpr[i++] = c; s += 2; } xfree (data); if (i != 20 || *s) { tty_printf (_("Error: invalid formatted fingerprint.\n")); return -1; } rc = agent_scd_setattr (fprno==1?"CA-FPR-1": fprno==2?"CA-FPR-2": fprno==3?"CA-FPR-3":"x", fpr, 20, NULL ); if (rc) log_error ("error setting cafpr: %s\n", gpg_strerror (rc)); write_sc_op_status (rc); return rc; } static void toggle_forcesig (void) { struct agent_card_info_s info; int rc; int newstate; memset (&info, 0, sizeof info); rc = agent_scd_getattr ("CHV-STATUS", &info); if (rc) { log_error ("error getting current status: %s\n", gpg_strerror (rc)); return; } newstate = !info.chv1_cached; agent_release_card_info (&info); rc = agent_scd_setattr ("CHV-STATUS-1", newstate? "\x01":"", 1, NULL); if (rc) log_error ("error toggling signature PIN flag: %s\n", gpg_strerror (rc)); write_sc_op_status (rc); } /* Helper for the key generation/edit functions. */ static int get_info_for_key_operation (struct agent_card_info_s *info) { int rc; memset (info, 0, sizeof *info); rc = agent_scd_getattr ("SERIALNO", info); if (rc || !info->serialno || strncmp (info->serialno, "D27600012401", 12) || strlen (info->serialno) != 32 ) { log_error (_("key operation not possible: %s\n"), rc ? gpg_strerror (rc) : _("not an OpenPGP card")); return rc? rc: -1; } rc = agent_scd_getattr ("KEY-FPR", info); if (!rc) rc = agent_scd_getattr ("CHV-STATUS", info); if (!rc) rc = agent_scd_getattr ("DISP-NAME", info); if (!rc) rc = agent_scd_getattr ("EXTCAP", info); if (!rc) rc = agent_scd_getattr ("KEY-ATTR", info); if (rc) log_error (_("error getting current key info: %s\n"), gpg_strerror (rc)); return rc; } /* Helper for the key generation/edit functions. */ static int check_pin_for_key_operation (struct agent_card_info_s *info, int *forced_chv1) { int rc = 0; agent_clear_pin_cache (info->serialno); *forced_chv1 = !info->chv1_cached; if (*forced_chv1) { /* Switch off the forced mode so that during key generation we don't get bothered with PIN queries for each self-signature. */ rc = agent_scd_setattr ("CHV-STATUS-1", "\x01", 1, info->serialno); if (rc) { log_error ("error clearing forced signature PIN flag: %s\n", gpg_strerror (rc)); *forced_chv1 = 0; } } if (!rc) { /* Check the PIN now, so that we won't get asked later for each binding signature. */ rc = agent_scd_checkpin (info->serialno); if (rc) { log_error ("error checking the PIN: %s\n", gpg_strerror (rc)); write_sc_op_status (rc); } } return rc; } /* Helper for the key generation/edit functions. */ static void restore_forced_chv1 (int *forced_chv1) { int rc; if (*forced_chv1) { /* Switch back to forced state. */ rc = agent_scd_setattr ("CHV-STATUS-1", "", 1, NULL); if (rc) { log_error ("error setting forced signature PIN flag: %s\n", gpg_strerror (rc)); } } } /* Helper for the key generation/edit functions. */ static void show_card_key_info (struct agent_card_info_s *info) { tty_fprintf (NULL, "Signature key ....:"); print_sha1_fpr (NULL, info->fpr1valid? info->fpr1:NULL); tty_fprintf (NULL, "Encryption key....:"); print_sha1_fpr (NULL, info->fpr2valid? info->fpr2:NULL); tty_fprintf (NULL, "Authentication key:"); print_sha1_fpr (NULL, info->fpr3valid? info->fpr3:NULL); tty_printf ("\n"); } /* Helper for the key generation/edit functions. */ static int replace_existing_key_p (struct agent_card_info_s *info, int keyno) { assert (keyno >= 0 && keyno <= 3); if ((keyno == 1 && info->fpr1valid) || (keyno == 2 && info->fpr2valid) || (keyno == 3 && info->fpr3valid)) { tty_printf ("\n"); log_info ("WARNING: such a key has already been stored on the card!\n"); tty_printf ("\n"); if ( !cpr_get_answer_is_yes( "cardedit.genkeys.replace_key", _("Replace existing key? (y/N) "))) return -1; } return 0; } static void show_keysize_warning (void) { static int shown; if (shown) return; shown = 1; tty_printf (_("NOTE: There is no guarantee that the card " "supports the requested size.\n" " If the key generation does not succeed, " "please check the\n" " documentation of your card to see what " "sizes are allowed.\n")); } /* Ask for the size of a card key. NBITS is the current size configured for the card. KEYNO is the number of the key used to select the prompt. Returns 0 to use the default size (i.e. NBITS) or the selected size. */ static unsigned int ask_card_keysize (int keyno, unsigned int nbits) { unsigned int min_nbits = 1024; unsigned int max_nbits = 3072; /* GnuPG limit due to Assuan. */ char *prompt, *answer; unsigned int req_nbits; for (;;) { prompt = xasprintf (keyno == 0? _("What keysize do you want for the Signature key? (%u) "): keyno == 1? _("What keysize do you want for the Encryption key? (%u) "): _("What keysize do you want for the Authentication key? (%u) "), nbits); answer = cpr_get ("cardedit.genkeys.size", prompt); cpr_kill_prompt (); req_nbits = *answer? atoi (answer): nbits; xfree (prompt); xfree (answer); if (req_nbits != nbits && (req_nbits % 32) ) { req_nbits = ((req_nbits + 31) / 32) * 32; tty_printf (_("rounded up to %u bits\n"), req_nbits); } if (req_nbits == nbits) return 0; /* Use default. */ if (req_nbits < min_nbits || req_nbits > max_nbits) { tty_printf (_("%s keysizes must be in the range %u-%u\n"), "RSA", min_nbits, max_nbits); } else { tty_printf (_("The card will now be re-configured " "to generate a key of %u bits\n"), req_nbits); show_keysize_warning (); return req_nbits; } } } /* Change the size of key KEYNO (0..2) to NBITS and show an error message if that fails. */ static gpg_error_t do_change_keysize (int keyno, unsigned int nbits) { gpg_error_t err; char args[100]; snprintf (args, sizeof args, "--force %d 1 %u", keyno+1, nbits); err = agent_scd_setattr ("KEY-ATTR", args, strlen (args), NULL); if (err) log_error (_("error changing size of key %d to %u bits: %s\n"), keyno+1, nbits, gpg_strerror (err)); return err; } static void generate_card_keys (void) { struct agent_card_info_s info; int forced_chv1; int want_backup; int keyno; if (get_info_for_key_operation (&info)) return; if (info.extcap.ki) { char *answer; answer = cpr_get ("cardedit.genkeys.backup_enc", _("Make off-card backup of encryption key? (Y/n) ")); want_backup = answer_is_yes_no_default (answer, 1/*(default to Yes)*/); cpr_kill_prompt (); xfree (answer); } else want_backup = 0; if ( (info.fpr1valid && !fpr_is_zero (info.fpr1)) || (info.fpr2valid && !fpr_is_zero (info.fpr2)) || (info.fpr3valid && !fpr_is_zero (info.fpr3))) { tty_printf ("\n"); log_info (_("NOTE: keys are already stored on the card!\n")); tty_printf ("\n"); if ( !cpr_get_answer_is_yes ("cardedit.genkeys.replace_keys", _("Replace existing keys? (y/N) "))) { agent_release_card_info (&info); return; } } /* If no displayed name has been set, we assume that this is a fresh card and print a hint about the default PINs. */ if (!info.disp_name || !*info.disp_name) { tty_printf ("\n"); tty_printf (_("Please note that the factory settings of the PINs are\n" " PIN = `%s' Admin PIN = `%s'\n" "You should change them using the command --change-pin\n"), "123456", "12345678"); tty_printf ("\n"); } if (check_pin_for_key_operation (&info, &forced_chv1)) goto leave; /* If the cards features changeable key attributes, we ask for the key size. */ if (info.is_v2 && info.extcap.aac) { unsigned int nbits; for (keyno = 0; keyno < DIM (info.key_attr); keyno++) { nbits = ask_card_keysize (keyno, info.key_attr[keyno].nbits); if (nbits && do_change_keysize (keyno, nbits)) { /* Error: Better read the default key size again. */ agent_release_card_info (&info); if (get_info_for_key_operation (&info)) goto leave; /* Ask again for this key size. */ keyno--; } } /* Note that INFO has not be synced. However we will only use the serialnumber and thus it won't harm. */ } generate_keypair (NULL, info.serialno, want_backup? opt.homedir:NULL); leave: agent_release_card_info (&info); restore_forced_chv1 (&forced_chv1); } /* This function is used by the key edit menu to generate an arbitrary subkey. */ int card_generate_subkey (KBNODE pub_keyblock, KBNODE sec_keyblock) { struct agent_card_info_s info; int okay = 0; int forced_chv1 = 0; int keyno; if (get_info_for_key_operation (&info)) return 0; show_card_key_info (&info); tty_printf (_("Please select the type of key to generate:\n")); tty_printf (_(" (1) Signature key\n")); tty_printf (_(" (2) Encryption key\n")); tty_printf (_(" (3) Authentication key\n")); for (;;) { char *answer = cpr_get ("cardedit.genkeys.subkeytype", _("Your selection? ")); cpr_kill_prompt(); if (*answer == CONTROL_D) { xfree (answer); goto leave; } keyno = *answer? atoi(answer): 0; xfree(answer); if (keyno >= 1 && keyno <= 3) break; /* Okay. */ tty_printf(_("Invalid selection.\n")); } if (replace_existing_key_p (&info, keyno)) goto leave; if (check_pin_for_key_operation (&info, &forced_chv1)) goto leave; /* If the cards features changeable key attributes, we ask for the key size. */ if (info.is_v2 && info.extcap.aac) { unsigned int nbits; ask_again: nbits = ask_card_keysize (keyno-1, info.key_attr[keyno-1].nbits); if (nbits && do_change_keysize (keyno-1, nbits)) { /* Error: Better read the default key size again. */ agent_release_card_info (&info); if (get_info_for_key_operation (&info)) goto leave; goto ask_again; } /* Note that INFO has not be synced. However we will only use the serialnumber and thus it won't harm. */ } okay = generate_card_subkeypair (pub_keyblock, sec_keyblock, keyno, info.serialno); leave: agent_release_card_info (&info); restore_forced_chv1 (&forced_chv1); return okay; } /* Store the key at NODE into the smartcard and modify NODE to carry the serialno stuff instead of the actual secret key parameters. USE is the usage for that key; 0 means any usage. */ int card_store_subkey (KBNODE node, int use) { struct agent_card_info_s info; int okay = 0; int rc; int keyno, i; PKT_secret_key *copied_sk = NULL; PKT_secret_key *sk; size_t n; const char *s; int allow_keyno[3]; unsigned int nbits; assert (node->pkt->pkttype == PKT_SECRET_KEY || node->pkt->pkttype == PKT_SECRET_SUBKEY); sk = node->pkt->pkt.secret_key; if (get_info_for_key_operation (&info)) return 0; if (!info.extcap.ki) { tty_printf ("The card does not support the import of keys\n"); tty_printf ("\n"); goto leave; } show_card_key_info (&info); nbits = nbits_from_sk (sk); if (!is_RSA (sk->pubkey_algo) || (!info.is_v2 && nbits != 1024) ) { tty_printf ("You may only store a 1024 bit RSA key on the card\n"); tty_printf ("\n"); goto leave; } allow_keyno[0] = (!use || (use & (PUBKEY_USAGE_SIG))); allow_keyno[1] = (!use || (use & (PUBKEY_USAGE_ENC))); allow_keyno[2] = (!use || (use & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_AUTH))); tty_printf (_("Please select where to store the key:\n")); if (allow_keyno[0]) tty_printf (_(" (1) Signature key\n")); if (allow_keyno[1]) tty_printf (_(" (2) Encryption key\n")); if (allow_keyno[2]) tty_printf (_(" (3) Authentication key\n")); for (;;) { char *answer = cpr_get ("cardedit.genkeys.storekeytype", _("Your selection? ")); cpr_kill_prompt(); if (*answer == CONTROL_D || !*answer) { xfree (answer); goto leave; } keyno = *answer? atoi(answer): 0; xfree(answer); if (keyno >= 1 && keyno <= 3 && allow_keyno[keyno-1]) { if (info.is_v2 && !info.extcap.aac && info.key_attr[keyno-1].nbits != nbits) { tty_printf ("Key does not match the card's capability.\n"); } else break; /* Okay. */ } else tty_printf(_("Invalid selection.\n")); } if (replace_existing_key_p (&info, keyno)) goto leave; /* Unprotect key. */ switch (is_secret_key_protected (sk) ) { case 0: /* Not protected. */ break; case -1: log_error (_("unknown key protection algorithm\n")); goto leave; default: if (sk->protect.s2k.mode == 1001) { log_error (_("secret parts of key are not available\n")); goto leave; } if (sk->protect.s2k.mode == 1002) { log_error (_("secret key already stored on a card\n")); goto leave; } /* We better copy the key before we unprotect it. */ copied_sk = sk = copy_secret_key (NULL, sk); rc = check_secret_key (sk, 0); if (rc) goto leave; } rc = save_unprotected_key_to_card (sk, keyno); if (rc) { log_error (_("error writing key to card: %s\n"), gpg_strerror (rc)); goto leave; } /* Get back to the maybe protected original secret key. */ if (copied_sk) { free_secret_key (copied_sk); copied_sk = NULL; } sk = node->pkt->pkt.secret_key; /* Get rid of the secret key parameters and store the serial numer. */ n = pubkey_get_nskey (sk->pubkey_algo); for (i=pubkey_get_npkey (sk->pubkey_algo); i < n; i++) { gcry_mpi_release (sk->skey[i]); sk->skey[i] = NULL; } i = pubkey_get_npkey (sk->pubkey_algo); sk->skey[i] = gcry_mpi_set_opaque (NULL, xstrdup ("dummydata"), 10*8); sk->is_protected = 1; sk->protect.s2k.mode = 1002; s = info.serialno; for (sk->protect.ivlen=0; sk->protect.ivlen < 16 && *s && s[1]; sk->protect.ivlen++, s += 2) sk->protect.iv[sk->protect.ivlen] = xtoi_2 (s); okay = 1; leave: if (copied_sk) free_secret_key (copied_sk); agent_release_card_info (&info); return okay; } /* Data used by the command parser. This needs to be outside of the function scope to allow readline based command completion. */ enum cmdids { cmdNOP = 0, cmdQUIT, cmdADMIN, cmdHELP, cmdLIST, cmdDEBUG, cmdVERIFY, cmdNAME, cmdURL, cmdFETCH, cmdLOGIN, cmdLANG, cmdSEX, cmdCAFPR, cmdFORCESIG, cmdGENERATE, cmdPASSWD, cmdPRIVATEDO, cmdWRITECERT, cmdREADCERT, cmdUNBLOCK, cmdINVCMD }; static struct { const char *name; enum cmdids id; int admin_only; const char *desc; } cmds[] = { { "quit" , cmdQUIT , 0, N_("quit this menu")}, { "q" , cmdQUIT , 0, NULL }, { "admin" , cmdADMIN , 0, N_("show admin commands")}, { "help" , cmdHELP , 0, N_("show this help")}, { "?" , cmdHELP , 0, NULL }, { "list" , cmdLIST , 0, N_("list all available data")}, { "l" , cmdLIST , 0, NULL }, { "debug" , cmdDEBUG , 0, NULL }, { "name" , cmdNAME , 1, N_("change card holder's name")}, { "url" , cmdURL , 1, N_("change URL to retrieve key")}, { "fetch" , cmdFETCH , 0, N_("fetch the key specified in the card URL")}, { "login" , cmdLOGIN , 1, N_("change the login name")}, { "lang" , cmdLANG , 1, N_("change the language preferences")}, { "sex" , cmdSEX , 1, N_("change card holder's sex")}, { "cafpr" , cmdCAFPR , 1, N_("change a CA fingerprint")}, { "forcesig", cmdFORCESIG, 1, N_("toggle the signature force PIN flag")}, { "generate", cmdGENERATE, 1, N_("generate new keys")}, { "passwd" , cmdPASSWD, 0, N_("menu to change or unblock the PIN")}, { "verify" , cmdVERIFY, 0, N_("verify the PIN and list all data")}, { "unblock" , cmdUNBLOCK,0, N_("unblock the PIN using a Reset Code") }, /* Note, that we do not announce these command yet. */ { "privatedo", cmdPRIVATEDO, 0, NULL }, { "readcert", cmdREADCERT, 0, NULL }, { "writecert", cmdWRITECERT, 1, NULL }, { NULL, cmdINVCMD, 0, NULL } }; #ifdef HAVE_LIBREADLINE /* These two functions are used by readline for command completion. */ static char * command_generator(const char *text,int state) { static int list_index,len; const char *name; /* If this is a new word to complete, initialize now. This includes saving the length of TEXT for efficiency, and initializing the index variable to 0. */ if(!state) { list_index=0; len=strlen(text); } /* Return the next partial match */ while((name=cmds[list_index].name)) { /* Only complete commands that have help text */ if(cmds[list_index++].desc && strncmp(name,text,len)==0) return strdup(name); } return NULL; } static char ** card_edit_completion(const char *text, int start, int end) { (void)end; /* If we are at the start of a line, we try and command-complete. If not, just do nothing for now. */ if(start==0) return rl_completion_matches(text,command_generator); rl_attempted_completion_over=1; return NULL; } #endif /*HAVE_LIBREADLINE*/ /* Menu to edit all user changeable values on an OpenPGP card. Only Key creation is not handled here. */ void card_edit (strlist_t commands) { enum cmdids cmd = cmdNOP; int have_commands = !!commands; int redisplay = 1; char *answer = NULL; int allow_admin=0; char serialnobuf[50]; if (opt.command_fd != -1) ; else if (opt.batch && !have_commands) { log_error(_("can't do this in batch mode\n")); goto leave; } for (;;) { int arg_number; const char *arg_string = ""; const char *arg_rest = ""; char *p; int i; int cmd_admin_only; tty_printf("\n"); if (redisplay ) { if (opt.with_colons) { card_status (stdout, serialnobuf, DIM (serialnobuf)); fflush (stdout); } else { card_status (NULL, serialnobuf, DIM (serialnobuf)); tty_printf("\n"); } redisplay = 0; } do { xfree (answer); if (have_commands) { if (commands) { answer = xstrdup (commands->d); commands = commands->next; } else if (opt.batch) { answer = xstrdup ("quit"); } else have_commands = 0; } if (!have_commands) { tty_enable_completion (card_edit_completion); answer = cpr_get_no_help("cardedit.prompt", _("gpg/card> ")); cpr_kill_prompt(); tty_disable_completion (); } trim_spaces(answer); } while ( *answer == '#' ); arg_number = 0; /* Yes, here is the init which egcc complains about */ cmd_admin_only = 0; if (!*answer) cmd = cmdLIST; /* Default to the list command */ else if (*answer == CONTROL_D) cmd = cmdQUIT; else { if ((p=strchr (answer,' '))) { *p++ = 0; trim_spaces (answer); trim_spaces (p); arg_number = atoi(p); arg_string = p; arg_rest = p; while (digitp (arg_rest)) arg_rest++; while (spacep (arg_rest)) arg_rest++; } for (i=0; cmds[i].name; i++ ) if (!ascii_strcasecmp (answer, cmds[i].name )) break; cmd = cmds[i].id; cmd_admin_only = cmds[i].admin_only; } if (!allow_admin && cmd_admin_only) { tty_printf ("\n"); tty_printf (_("Admin-only command\n")); continue; } switch (cmd) { case cmdHELP: for (i=0; cmds[i].name; i++ ) if(cmds[i].desc && (!cmds[i].admin_only || (cmds[i].admin_only && allow_admin))) tty_printf("%-10s %s\n", cmds[i].name, _(cmds[i].desc) ); break; case cmdADMIN: if ( !strcmp (arg_string, "on") ) allow_admin = 1; else if ( !strcmp (arg_string, "off") ) allow_admin = 0; else if ( !strcmp (arg_string, "verify") ) { /* Force verification of the Admin Command. However, this is only done if the retry counter is at initial state. */ char *tmp = xmalloc (strlen (serialnobuf) + 6 + 1); strcpy (stpcpy (tmp, serialnobuf), "[CHV3]"); allow_admin = !agent_scd_checkpin (tmp); xfree (tmp); } else /* Toggle. */ allow_admin=!allow_admin; if(allow_admin) tty_printf(_("Admin commands are allowed\n")); else tty_printf(_("Admin commands are not allowed\n")); break; case cmdVERIFY: agent_scd_checkpin (serialnobuf); redisplay = 1; break; case cmdLIST: redisplay = 1; break; case cmdNAME: change_name (); break; case cmdURL: change_url (); break; case cmdFETCH: fetch_url(); break; case cmdLOGIN: change_login (arg_string); break; case cmdLANG: change_lang (); break; case cmdSEX: change_sex (); break; case cmdCAFPR: if ( arg_number < 1 || arg_number > 3 ) tty_printf ("usage: cafpr N\n" " 1 <= N <= 3\n"); else change_cafpr (arg_number); break; case cmdPRIVATEDO: if ( arg_number < 1 || arg_number > 4 ) tty_printf ("usage: privatedo N\n" " 1 <= N <= 4\n"); else change_private_do (arg_string, arg_number); break; case cmdWRITECERT: if ( arg_number != 3 ) tty_printf ("usage: writecert 3 < FILE\n"); else change_cert (arg_rest); break; case cmdREADCERT: if ( arg_number != 3 ) tty_printf ("usage: readcert 3 > FILE\n"); else read_cert (arg_rest); break; case cmdFORCESIG: toggle_forcesig (); break; case cmdGENERATE: generate_card_keys (); break; case cmdPASSWD: change_pin (0, allow_admin); break; case cmdUNBLOCK: change_pin (1, allow_admin); break; case cmdQUIT: goto leave; case cmdNOP: break; case cmdINVCMD: default: tty_printf ("\n"); tty_printf (_("Invalid command (try \"help\")\n")); break; } /* End command switch. */ } /* End of main menu loop. */ leave: xfree (answer); }