mirror of
git://git.gnupg.org/gnupg.git
synced 2025-07-02 22:46:30 +02:00
Doc fixes, moved some fizmes to TODO, fixed minor bugs.
This commit is contained in:
Werner Koch
parent
c6736b6435
commit
c39b866d2a
14 changed files with 208 additions and 421 deletions
549
scd/card.c
549
scd/card.c
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@ -29,19 +29,10 @@
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#include <ksba.h>
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#include "scdaemon.h"
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struct card_ctx_s {
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int reader; /* used reader */
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struct sc_context *ctx;
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struct sc_card *scard;
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struct sc_pkcs15_card *p15card; /* only if there is a pkcs15 application */
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};
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#include "card-common.h"
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/* Map the SC error codes to the GNUPG ones */
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static int
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int
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map_sc_err (int rc)
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{
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switch (rc)
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@ -84,9 +75,40 @@ map_sc_err (int rc)
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return rc;
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}
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/* Get the keygrip from CERT, return 0 on success */
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int
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card_help_get_keygrip (KsbaCert cert, unsigned char *array)
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{
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GCRY_SEXP s_pkey;
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int rc;
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KsbaSexp p;
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size_t n;
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p = ksba_cert_get_public_key (cert);
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if (!p)
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return -1; /* oops */
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n = gcry_sexp_canon_len (p, 0, NULL, NULL);
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if (!n)
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return -1; /* libksba did not return a proper S-expression */
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rc = gcry_sexp_sscan ( &s_pkey, NULL, p, n);
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xfree (p);
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if (rc)
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return -1; /* can't parse that S-expression */
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array = gcry_pk_get_keygrip (s_pkey, array);
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gcry_sexp_release (s_pkey);
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if (!array)
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return -1; /* failed to calculate the keygrip */
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return 0;
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}
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/* Create a new context for the card and figures out some basic
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information of the card. Detects whether a PKCS_15 application is
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information of the card. Detects whgether a PKCS_15 application is
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stored.
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Common errors: GNUPG_Card_Not_Present */
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@ -114,7 +136,11 @@ card_open (CARD *rcard)
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rc = GNUPG_Card_Error;
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}
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card->ctx->error_file = log_get_stream ();
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card->ctx->debug_file = log_get_stream ();
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if (opt.debug)
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{
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card->ctx->debug = 1;
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card->ctx->debug_file = log_get_stream ();
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}
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if (sc_detect_card_presence (card->ctx->reader[card->reader], 0) != 1)
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{
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rc = GNUPG_Card_Not_Present;
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@ -142,16 +168,6 @@ card_open (CARD *rcard)
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goto leave;
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}
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rc = sc_pkcs15_bind (card->scard, &card->p15card);
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if (rc == SC_ERROR_PKCS15_APP_NOT_FOUND)
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rc = 0; /* okay */
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else if (rc)
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{
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log_error ("binding of existing PKCS-15 failed in reader %d: %s\n",
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card->reader, sc_strerror (rc));
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rc = map_sc_err (rc);
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goto leave;
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}
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leave:
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if (rc)
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@ -188,6 +204,8 @@ card_close (CARD card)
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}
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}
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/* Retrieve the serial number and the time of the last update of the
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card. The serial number is returned as a malloced string (hex
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encoded) in SERIAL and the time of update is returned in STAMP.
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@ -195,22 +213,95 @@ card_close (CARD card)
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is mandatory for a PKCS_15 application and an error will be
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returned if this value is not availbale. For non-PKCS-15 cards a
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serial number is constructed by other means. Caller must free
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SERIAL unless the fucntion returns an error. */
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SERIAL unless the function returns an error. */
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int
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card_get_serial_and_stamp (CARD card, char **serial, time_t *stamp)
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{
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char *s;
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int rc;
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if (!card || !serial || !stamp)
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return GNUPG_Invalid_Value;
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*serial = NULL;
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*stamp = 0; /* not available */
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if (!card->fnc.initialized)
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{
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card->fnc.initialized = 1;
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/* The first use of this card tries to figure out the type of the card
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and sets up the function pointers. */
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rc = sc_pkcs15_bind (card->scard, &card->p15card);
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if (rc)
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{
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if (rc != SC_ERROR_PKCS15_APP_NOT_FOUND)
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log_error ("binding of existing PKCS-15 failed in reader %d: %s\n",
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card->reader, sc_strerror (rc));
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card->p15card = NULL;
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rc = 0;
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}
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if (card->p15card)
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card_p15_bind (card);
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else
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card_dinsig_bind (card);
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card->fnc.initialized = 1;
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}
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if (!card->p15card)
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{ /* fixme: construct a serial number */
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/* We should lookup the iso 7812-1 and 8583-3 - argh ISO practice is
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suppressing innovation - IETF rules! */
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return GNUPG_No_PKCS15_App;
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/* We should lookup the iso 7812-1 and 8583-3 - argh ISO
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practice is suppressing innovation - IETF rules! Anyway,
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we try to get the serialnumber from the 2F00 GDO file. */
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struct sc_path path;
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struct sc_file *file;
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unsigned char buf[12];
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int i;
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sc_format_path ("3F002F02", &path);
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rc = sc_select_file (card->scard, &path, &file);
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if (rc)
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{
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log_error ("sc_select_file failed: %s\n", sc_strerror (rc));
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return GNUPG_Card_Error;
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}
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if (file->type != SC_FILE_TYPE_WORKING_EF
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|| file->ef_structure != SC_FILE_EF_TRANSPARENT)
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{
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log_error ("wrong type or structure of GDO file\n");
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sc_file_free (file);
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return GNUPG_Card_Error;
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}
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if (file->size != 12)
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{ /* FIXME: Use a real parser */
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log_error ("unsupported size of GDO file\n");
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sc_file_free (file);
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return GNUPG_Card_Error;
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}
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rc = sc_read_binary (card->scard, 0, buf, DIM (buf), 0);
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sc_file_free (file);
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if (rc < 0)
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{
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log_error ("error reading GDO file: %s\n", sc_strerror (rc));
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return GNUPG_Card_Error;
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}
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if (rc != file->size)
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{
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log_error ("short read on GDO file\n");
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return GNUPG_Card_Error;
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}
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if (buf[0] != 0x5a || buf[1] != 10)
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{
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log_error ("invalid structure of GDO file\n");
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return GNUPG_Card_Error;
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}
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*serial = s = xtrymalloc (21);
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if (!*serial)
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return GNUPG_Out_Of_Core;
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for (i=0; i < 10; i++, s += 2)
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sprintf (s, "%02X", buf[2+i]);
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return 0;
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}
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s = card->p15card->serial_number;
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if (!s || !hexdigitp (s) )
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@ -222,41 +313,12 @@ card_get_serial_and_stamp (CARD card, char **serial, time_t *stamp)
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}
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/* Get the keygrip from CERT, return 0 on success */
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static int
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get_keygrip (KsbaCert cert, unsigned char *array)
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{
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GCRY_SEXP s_pkey;
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int rc;
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KsbaSexp p;
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size_t n;
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p = ksba_cert_get_public_key (cert);
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if (!p)
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return -1; /* oops */
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n = gcry_sexp_canon_len (p, 0, NULL, NULL);
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if (!n)
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return -1; /* libksba did not return a proper S-expression */
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rc = gcry_sexp_sscan ( &s_pkey, NULL, p, n);
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xfree (p);
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if (rc)
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return -1; /* can't parse that S-expression */
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array = gcry_pk_get_keygrip (s_pkey, array);
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gcry_sexp_release (s_pkey);
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if (!array)
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return -1; /* failed to calculate the keygrip */
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return 0;
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}
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/* Enumerate all keypairs on the card and return the Keygrip as well
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as the internal identification of the key. KEYGRIP must be a
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caller provided buffer with a size of 20 bytes which will receive
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the KEYGRIP of the keypair. If KEYID is not NULL, it returns the
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ID field of the key in allocated memory, NKEYID will then receive
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the length of it. The function returns -1 when all keys have been
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ID field of the key in allocated memory; this is a string without
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spaces. The function returns -1 when all keys have been
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enumerated. Note that the error GNUPG_Missing_Certificate may be
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returned if there is just the private key but no public key (ie.e a
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certificate) available. Applications might want to continue
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@ -264,129 +326,29 @@ get_keygrip (KsbaCert cert, unsigned char *array)
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int
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card_enum_keypairs (CARD card, int idx,
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unsigned char *keygrip,
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unsigned char **keyid, size_t *nkeyid)
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char **keyid)
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{
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int rc;
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KsbaError krc;
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struct sc_pkcs15_object *objs[32], *tmpobj;
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int nobjs;
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struct sc_pkcs15_prkey_info *pinfo;
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struct sc_pkcs15_cert_info *certinfo;
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struct sc_pkcs15_cert *certder;
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KsbaCert cert;
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if (keyid)
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*keyid = NULL;
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if (nkeyid)
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*nkeyid = 0;
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if (!card || !keygrip || !card->p15card)
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if (!card || !keygrip)
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return GNUPG_Invalid_Value;
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if (idx < 0)
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return GNUPG_Invalid_Index;
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rc = sc_pkcs15_get_objects (card->p15card, SC_PKCS15_TYPE_PRKEY_RSA,
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objs, DIM (objs));
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if (rc < 0)
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{
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log_error ("private keys enumeration failed: %s\n", sc_strerror (rc));
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return GNUPG_Card_Error;
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}
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nobjs = rc;
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rc = 0;
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if (idx >= nobjs)
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return -1;
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pinfo = objs[idx]->data;
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/* now we need to read the certificate so that we can calculate the
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keygrip */
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rc = sc_pkcs15_find_cert_by_id (card->p15card, &pinfo->id, &tmpobj);
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if (rc)
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{
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log_info ("certificate for private key %d not found: %s\n",
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idx, sc_strerror (rc));
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/* but we should return the ID anyway */
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if (keyid)
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{
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*keyid = xtrymalloc (pinfo->id.len);
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if (!*keyid)
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return GNUPG_Out_Of_Core;
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memcpy (*keyid, pinfo->id.value, pinfo->id.len);
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}
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if (nkeyid)
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*nkeyid = pinfo->id.len;
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return GNUPG_Missing_Certificate;
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}
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certinfo = tmpobj->data;
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rc = sc_pkcs15_read_certificate (card->p15card, certinfo, &certder);
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if (rc)
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{
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log_info ("failed to read certificate for private key %d: %s\n",
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idx, sc_strerror (rc));
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return GNUPG_Card_Error;
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}
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cert = ksba_cert_new ();
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if (!cert)
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{
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sc_pkcs15_free_certificate (certder);
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return GNUPG_Out_Of_Core;
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}
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krc = ksba_cert_init_from_mem (cert, certder->data, certder->data_len);
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sc_pkcs15_free_certificate (certder);
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if (krc)
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{
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log_error ("failed to parse the certificate for private key %d: %s\n",
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idx, ksba_strerror (krc));
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ksba_cert_release (cert);
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return GNUPG_Card_Error;
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}
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if (get_keygrip (cert, keygrip))
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{
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log_error ("failed to calculate the keygrip of private key %d\n", idx);
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ksba_cert_release (cert);
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return GNUPG_Card_Error;
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}
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ksba_cert_release (cert);
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/* return the iD */
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if (keyid)
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{
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*keyid = xtrymalloc (pinfo->id.len);
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if (!*keyid)
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return GNUPG_Out_Of_Core;
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memcpy (*keyid, pinfo->id.value, pinfo->id.len);
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}
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if (nkeyid)
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*nkeyid = pinfo->id.len;
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return 0;
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if (!card->fnc.initialized)
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return GNUPG_Card_Not_Initialized;
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if (!card->fnc.enum_keypairs)
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return GNUPG_Unsupported_Operation;
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rc = card->fnc.enum_keypairs (card, idx, keygrip, keyid);
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if (opt.verbose)
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log_info ("card operation enum_keypairs result: %s\n",
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gnupg_strerror (rc));
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return rc;
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}
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static int
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idstr_to_id (const char *idstr, struct sc_pkcs15_id *id)
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{
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const char *s;
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int n;
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/* For now we only support the standard DF */
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if (strncmp (idstr, "3F005015.", 9) )
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return GNUPG_Invalid_Id;
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for (s=idstr+9, n=0; hexdigitp (s); s++, n++)
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;
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if (*s || (n&1))
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return GNUPG_Invalid_Id; /* invalid or odd number of digits */
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n /= 2;
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if (!n || n > SC_PKCS15_MAX_ID_SIZE)
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return GNUPG_Invalid_Id; /* empty or too large */
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for (s=idstr+9, n=0; *s; s += 2, n++)
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id->value[n] = xtoi_2 (s);
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id->len = n;
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return 0;
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}
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/* Read the certificate identified by CERTIDSTR which is the
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hexadecimal encoded ID of the certificate, prefixed with the string
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"3F005015.". The certificate is return in DER encoded form in CERT
|
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@ -395,148 +357,45 @@ int
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card_read_cert (CARD card, const char *certidstr,
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unsigned char **cert, size_t *ncert)
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{
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struct sc_pkcs15_object *tmpobj;
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struct sc_pkcs15_id certid;
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struct sc_pkcs15_cert_info *certinfo;
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struct sc_pkcs15_cert *certder;
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int rc;
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if (!card || !certidstr || !card->p15card || !cert || !ncert)
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if (!card || !certidstr || !cert || !ncert)
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return GNUPG_Invalid_Value;
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rc = idstr_to_id (certidstr, &certid);
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if (rc)
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return rc;
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rc = sc_pkcs15_find_cert_by_id (card->p15card, &certid, &tmpobj);
|
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if (rc)
|
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{
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log_info ("certificate '%s' not found: %s\n",
|
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certidstr, sc_strerror (rc));
|
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return -1;
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}
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certinfo = tmpobj->data;
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rc = sc_pkcs15_read_certificate (card->p15card, certinfo, &certder);
|
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if (rc)
|
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{
|
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log_info ("failed to read certificate '%s': %s\n",
|
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certidstr, sc_strerror (rc));
|
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return GNUPG_Card_Error;
|
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}
|
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|
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*cert = xtrymalloc (certder->data_len);
|
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if (!*cert)
|
||||
{
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sc_pkcs15_free_certificate (certder);
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return GNUPG_Out_Of_Core;
|
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}
|
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memcpy (*cert, certder->data, certder->data_len);
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*ncert = certder->data_len;
|
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sc_pkcs15_free_certificate (certder);
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return 0;
|
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if (!card->fnc.initialized)
|
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return GNUPG_Card_Not_Initialized;
|
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if (!card->fnc.read_cert)
|
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return GNUPG_Unsupported_Operation;
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rc = card->fnc.read_cert (card, certidstr, cert, ncert);
|
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if (opt.verbose)
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log_info ("card operation read_cert result: %s\n", gnupg_strerror (rc));
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return rc;
|
||||
}
|
||||
|
||||
|
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|
||||
/* Create the signature and return the allocated result in OUTDATA.
|
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If a PIN is required the PINCB will be used to ask for the PIN; it
|
||||
should return the PIN in an allocated buffer and put it into PIN. */
|
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int
|
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card_create_signature (CARD card, const char *keyidstr, int hashalgo,
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int (pincb)(void*, const char *, char **),
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void *pincb_arg,
|
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const void *indata, size_t indatalen,
|
||||
void **outdata, size_t *outdatalen )
|
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card_sign (CARD card, const char *keyidstr, int hashalgo,
|
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int (pincb)(void*, const char *, char **),
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void *pincb_arg,
|
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const void *indata, size_t indatalen,
|
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void **outdata, size_t *outdatalen )
|
||||
{
|
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unsigned int cryptflags = 0;
|
||||
struct sc_pkcs15_id keyid;
|
||||
struct sc_pkcs15_prkey_info *key;
|
||||
struct sc_pkcs15_pin_info *pin;
|
||||
struct sc_pkcs15_object *keyobj, *pinobj;
|
||||
char *pinvalue;
|
||||
int rc;
|
||||
unsigned char *outbuf = NULL;
|
||||
size_t outbuflen;
|
||||
|
||||
if (!card || !card->p15card || !indata || !indatalen
|
||||
|| !outdata || !outdatalen || !pincb)
|
||||
if (!card || !indata || !indatalen || !outdata || !outdatalen || !pincb)
|
||||
return GNUPG_Invalid_Value;
|
||||
|
||||
if (hashalgo != GCRY_MD_SHA1)
|
||||
return GNUPG_Unsupported_Algorithm;
|
||||
|
||||
rc = idstr_to_id (keyidstr, &keyid);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
rc = sc_pkcs15_find_prkey_by_id (card->p15card, &keyid, &keyobj);
|
||||
if (rc < 0)
|
||||
{
|
||||
log_error ("private key not found: %s\n", sc_strerror(rc));
|
||||
rc = GNUPG_No_Secret_Key;
|
||||
goto leave;
|
||||
}
|
||||
rc = 0;
|
||||
key = keyobj->data;
|
||||
|
||||
rc = sc_pkcs15_find_pin_by_auth_id (card->p15card,
|
||||
&keyobj->auth_id, &pinobj);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("failed to find PIN by auth ID: %s\n", sc_strerror (rc));
|
||||
rc = GNUPG_Bad_PIN_Method;
|
||||
goto leave;
|
||||
}
|
||||
pin = pinobj->data;
|
||||
|
||||
/* Fixme: pack this into a verification loop */
|
||||
/* Fixme: we might want to pass pin->min_length and
|
||||
pin->stored_length */
|
||||
rc = pincb (pincb_arg, pinobj->label, &pinvalue);
|
||||
if (rc)
|
||||
{
|
||||
log_info ("PIN callback returned error: %s\n", gnupg_strerror (rc));
|
||||
goto leave;
|
||||
}
|
||||
|
||||
rc = sc_pkcs15_verify_pin (card->p15card, pin,
|
||||
pinvalue, strlen (pinvalue));
|
||||
xfree (pinvalue);
|
||||
if (rc)
|
||||
{
|
||||
log_info ("PIN verification failed: %s\n", sc_strerror (rc));
|
||||
rc = GNUPG_Bad_PIN;
|
||||
goto leave;
|
||||
}
|
||||
|
||||
/* cryptflags |= SC_PKCS15_HASH_SHA1; */
|
||||
/* cryptflags |= SC_PKCS15_PAD_PKCS1_V1_5; */
|
||||
|
||||
outbuflen = 1024;
|
||||
outbuf = xtrymalloc (outbuflen);
|
||||
if (!outbuf)
|
||||
return GNUPG_Out_Of_Core;
|
||||
|
||||
rc = sc_pkcs15_compute_signature (card->p15card, key,
|
||||
cryptflags,
|
||||
indata, indatalen,
|
||||
outbuf, outbuflen );
|
||||
if (rc < 0)
|
||||
{
|
||||
log_error ("failed to create signature: %s\n", sc_strerror (rc));
|
||||
rc = GNUPG_Card_Error;
|
||||
}
|
||||
else
|
||||
{
|
||||
*outdatalen = rc;
|
||||
*outdata = outbuf;
|
||||
outbuf = NULL;
|
||||
rc = 0;
|
||||
}
|
||||
|
||||
|
||||
leave:
|
||||
xfree (outbuf);
|
||||
if (!card->fnc.initialized)
|
||||
return GNUPG_Card_Not_Initialized;
|
||||
if (!card->fnc.sign)
|
||||
return GNUPG_Unsupported_Operation;
|
||||
rc = card->fnc.sign (card, keyidstr, hashalgo,
|
||||
pincb, pincb_arg,
|
||||
indata, indatalen,
|
||||
outdata, outdatalen);
|
||||
if (opt.verbose)
|
||||
log_info ("card operation sign result: %s\n", gnupg_strerror (rc));
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
|
@ -551,93 +410,19 @@ card_decipher (CARD card, const char *keyidstr,
|
|||
const void *indata, size_t indatalen,
|
||||
void **outdata, size_t *outdatalen )
|
||||
{
|
||||
struct sc_pkcs15_id keyid;
|
||||
struct sc_pkcs15_prkey_info *key;
|
||||
struct sc_pkcs15_pin_info *pin;
|
||||
struct sc_pkcs15_object *keyobj, *pinobj;
|
||||
char *pinvalue;
|
||||
int rc;
|
||||
unsigned char *outbuf = NULL;
|
||||
size_t outbuflen;
|
||||
|
||||
if (!card || !card->p15card || !indata || !indatalen
|
||||
|| !outdata || !outdatalen || !pincb)
|
||||
if (!card || !indata || !indatalen || !outdata || !outdatalen || !pincb)
|
||||
return GNUPG_Invalid_Value;
|
||||
|
||||
rc = idstr_to_id (keyidstr, &keyid);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
rc = sc_pkcs15_find_prkey_by_id (card->p15card, &keyid, &keyobj);
|
||||
if (rc < 0)
|
||||
{
|
||||
log_error ("private key not found: %s\n", sc_strerror(rc));
|
||||
rc = GNUPG_No_Secret_Key;
|
||||
goto leave;
|
||||
}
|
||||
rc = 0;
|
||||
key = keyobj->data;
|
||||
|
||||
rc = sc_pkcs15_find_pin_by_auth_id (card->p15card,
|
||||
&keyobj->auth_id, &pinobj);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("failed to find PIN by auth ID: %s\n", sc_strerror (rc));
|
||||
rc = GNUPG_Bad_PIN_Method;
|
||||
goto leave;
|
||||
}
|
||||
pin = pinobj->data;
|
||||
|
||||
/* Fixme: pack this into a verification loop */
|
||||
/* Fixme: we might want to pass pin->min_length and
|
||||
pin->stored_length */
|
||||
rc = pincb (pincb_arg, pinobj->label, &pinvalue);
|
||||
if (rc)
|
||||
{
|
||||
log_info ("PIN callback returned error: %s\n", gnupg_strerror (rc));
|
||||
goto leave;
|
||||
}
|
||||
|
||||
rc = sc_pkcs15_verify_pin (card->p15card, pin,
|
||||
pinvalue, strlen (pinvalue));
|
||||
xfree (pinvalue);
|
||||
if (rc)
|
||||
{
|
||||
log_info ("PIN verification failed: %s\n", sc_strerror (rc));
|
||||
rc = GNUPG_Bad_PIN;
|
||||
goto leave;
|
||||
}
|
||||
|
||||
outbuflen = indatalen < 256? 256 : indatalen;
|
||||
outbuf = xtrymalloc (outbuflen);
|
||||
if (!outbuf)
|
||||
return GNUPG_Out_Of_Core;
|
||||
|
||||
/* OpenSC does not yet support decryption for cryptflex cards */
|
||||
/* rc = sc_pkcs15_decipher (card->p15card, key, */
|
||||
/* indata, indatalen, */
|
||||
/* outbuf, outbuflen); */
|
||||
rc = sc_pkcs15_compute_signature (card->p15card, key,
|
||||
0,
|
||||
indata, indatalen,
|
||||
outbuf, outbuflen );
|
||||
if (rc < 0)
|
||||
{
|
||||
log_error ("failed to decipger the data: %s\n", sc_strerror (rc));
|
||||
rc = GNUPG_Card_Error;
|
||||
}
|
||||
else
|
||||
{
|
||||
*outdatalen = rc;
|
||||
*outdata = outbuf;
|
||||
outbuf = NULL;
|
||||
rc = 0;
|
||||
}
|
||||
|
||||
|
||||
leave:
|
||||
xfree (outbuf);
|
||||
if (!card->fnc.initialized)
|
||||
return GNUPG_Card_Not_Initialized;
|
||||
if (!card->fnc.decipher)
|
||||
return GNUPG_Unsupported_Operation;
|
||||
rc = card->fnc.decipher (card, keyidstr,
|
||||
pincb, pincb_arg,
|
||||
indata, indatalen,
|
||||
outdata, outdatalen);
|
||||
if (opt.verbose)
|
||||
log_info ("card operation decipher result: %s\n", gnupg_strerror (rc));
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue