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scd: Support KDF Data Object of OpenPGPcard V3.3.
* scd/app-openpgp.c (do_getattr, do_setattr): Add KDF support. (pin2hash_if_kdf): New. (verify_a_chv): Add PINLEN arg. Use pin2hash_if_kdf. (verify_chv2, do_sign): Follow the change of verify_a_chv. (verify_chv3, do_change_pin): Use pin2hash_if_kdf. -- GnuPG-bug-id: 3152 Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka
parent
380bce13d9
commit
526d144b1b
@ -121,6 +121,7 @@ static struct {
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/* V3.0 */
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{ 0x7F74, 0, 0, 1, 0, 0, 0, 0, "General Feature Management"},
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{ 0x00D5, 0, 0, 1, 0, 0, 0, 0, "AES key data"},
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{ 0x00F9, 0, 0, 1, 0, 0, 0, 0, "KDF data object"},
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{ 0 }
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};
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@ -199,7 +200,7 @@ struct app_local_s {
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unsigned int private_dos:1;
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unsigned int algo_attr_change:1; /* Algorithm attributes changeable. */
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unsigned int has_decrypt:1; /* Support symmetric decryption. */
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unsigned int kdf_do:1; /* Support KDF DOs. */
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unsigned int kdf_do:1; /* Support KDF DO. */
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unsigned int sm_algo:2; /* Symmetric crypto algo for SM. */
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unsigned int pin_blk2:1; /* PIN block 2 format supported. */
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@ -980,6 +981,7 @@ do_getattr (app_t app, ctrl_t ctrl, const char *name)
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{ "PRIVATE-DO-4", 0x0104 },
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{ "$AUTHKEYID", 0x0000, -3 },
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{ "$DISPSERIALNO",0x0000, -4 },
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{ "KDF", 0x00F9 },
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{ NULL, 0 }
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};
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int idx, i, rc;
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@ -2054,6 +2056,47 @@ get_prompt_info (app_t app, int chvno, unsigned long sigcount, int remaining)
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return result;
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}
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/* Compute hash if KDF-DO is available. CHVNO must be 0 for reset
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code, 1 or 2 for user pin and 3 for admin pin.
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*/
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static gpg_error_t
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pin2hash_if_kdf (app_t app, int chvno, char *pinvalue, int *r_pinlen)
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{
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gpg_error_t err = 0;
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void *relptr;
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unsigned char *buffer;
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size_t buflen;
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if (app->app_local->extcap.kdf_do
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&& (relptr = get_one_do (app, 0x00F9, &buffer, &buflen, NULL)))
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{
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char *salt;
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unsigned long s2k_count;
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char dek[32];
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salt = &buffer[(chvno==3 ? 34 : (chvno==0 ? 24 : 14))];
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s2k_count = (((unsigned int)buffer[8] << 24)
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| (buffer[9] << 16) | (buffer[10] << 8) | buffer[11]);
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err = gcry_kdf_derive (pinvalue, strlen (pinvalue),
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GCRY_KDF_ITERSALTED_S2K,
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DIGEST_ALGO_SHA256, salt, 8,
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s2k_count, sizeof (dek), dek);
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if (!err)
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{
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/* pinvalue has a buffer of MAXLEN_PIN+1, 32 is OK. */
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*r_pinlen = 32;
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memcpy (pinvalue, dek, *r_pinlen);
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wipememory (dek, *r_pinlen);
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}
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xfree (relptr);
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}
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else
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*r_pinlen = strlen (pinvalue);
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return err;
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}
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/* Verify a CHV either using the pinentry or if possible by
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using a pinpad. PINCB and PINCB_ARG describe the usual callback
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@ -2068,8 +2111,8 @@ get_prompt_info (app_t app, int chvno, unsigned long sigcount, int remaining)
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static gpg_error_t
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verify_a_chv (app_t app,
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gpg_error_t (*pincb)(void*, const char *, char **),
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void *pincb_arg,
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int chvno, unsigned long sigcount, char **pinvalue)
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void *pincb_arg, int chvno, unsigned long sigcount,
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char **pinvalue, int *pinlen)
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{
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int rc = 0;
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char *prompt_buffer = NULL;
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@ -2081,6 +2124,7 @@ verify_a_chv (app_t app,
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log_assert (chvno == 1 || chvno == 2);
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*pinvalue = NULL;
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*pinlen = 0;
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remaining = get_remaining_tries (app, 0);
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if (remaining == -1)
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@ -2169,8 +2213,9 @@ verify_a_chv (app_t app,
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return gpg_error (GPG_ERR_BAD_PIN);
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}
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rc = iso7816_verify (app->slot, 0x80+chvno,
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*pinvalue, strlen (*pinvalue));
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rc = pin2hash_if_kdf (app, chvno, *pinvalue, pinlen);
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if (!rc)
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rc = iso7816_verify (app->slot, 0x80+chvno, *pinvalue, *pinlen);
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}
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if (rc)
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@ -2194,11 +2239,12 @@ verify_chv2 (app_t app,
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{
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int rc;
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char *pinvalue;
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int pinlen;
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if (app->did_chv2)
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return 0; /* We already verified CHV2. */
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rc = verify_a_chv (app, pincb, pincb_arg, 2, 0, &pinvalue);
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rc = verify_a_chv (app, pincb, pincb_arg, 2, 0, &pinvalue, &pinlen);
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if (rc)
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return rc;
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app->did_chv2 = 1;
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@ -2209,7 +2255,7 @@ verify_chv2 (app_t app,
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the card is not configured to require a verification before
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each CHV1 controlled operation (force_chv1) and if we are not
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using the pinpad (PINVALUE == NULL). */
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rc = iso7816_verify (app->slot, 0x81, pinvalue, strlen (pinvalue));
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rc = iso7816_verify (app->slot, 0x81, pinvalue, pinlen);
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if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
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rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
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if (rc)
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@ -2319,6 +2365,7 @@ verify_chv3 (app_t app,
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else
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{
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char *pinvalue;
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int pinlen;
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rc = pincb (pincb_arg, prompt, &pinvalue);
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xfree (prompt);
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@ -2338,7 +2385,9 @@ verify_chv3 (app_t app,
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return gpg_error (GPG_ERR_BAD_PIN);
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}
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rc = iso7816_verify (app->slot, 0x83, pinvalue, strlen (pinvalue));
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rc = pin2hash_if_kdf (app, 3, pinvalue, &pinlen);
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if (!rc)
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rc = iso7816_verify (app->slot, 0x83, pinvalue, pinlen);
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xfree (pinvalue);
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}
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@ -2389,6 +2438,7 @@ do_setattr (app_t app, const char *name,
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{ "SM-KEY-MAC", 0x00D2, 3, 0, 1 },
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{ "KEY-ATTR", 0, 0, 3, 1 },
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{ "AESKEY", 0x00D5, 3, 0, 1 },
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{ "KDF", 0x00F9, 3, 0, 1 },
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{ NULL, 0 }
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};
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int exmode;
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@ -2501,6 +2551,8 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
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pininfo_t pininfo;
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int use_pinpad = 0;
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int minlen = 6;
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int pinlen0 = 0;
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int pinlen = 0;
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(void)ctrl;
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memset (&pininfo, 0, sizeof pininfo);
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@ -2685,10 +2737,17 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
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rc = gpg_error_from_syserror ();
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else
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{
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strcpy (stpcpy (buffer, resetcode), pinvalue);
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strcpy (buffer, resetcode);
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rc = pin2hash_if_kdf (app, 0, buffer, &pinlen0);
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if (!rc)
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{
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strcpy (buffer+pinlen0, pinvalue);
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rc = pin2hash_if_kdf (app, 0, buffer+pinlen0, &pinlen);
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}
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if (!rc)
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rc = iso7816_reset_retry_counter_with_rc (app->slot, 0x81,
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buffer, strlen (buffer));
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wipememory (buffer, strlen (buffer));
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buffer, pinlen0+pinlen);
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wipememory (buffer, pinlen0 + pinlen);
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xfree (buffer);
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}
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}
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@ -2700,16 +2759,19 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
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rc = gpg_error (GPG_ERR_BAD_PIN);
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}
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else
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rc = iso7816_put_data (app->slot, 0, 0xD3,
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pinvalue, strlen (pinvalue));
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{
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rc = pin2hash_if_kdf (app, 0, pinvalue, &pinlen);
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if (!rc)
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rc = iso7816_put_data (app->slot, 0, 0xD3, pinvalue, pinlen);
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}
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}
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else if (reset_mode)
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{
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rc = iso7816_reset_retry_counter (app->slot, 0x81,
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pinvalue, strlen (pinvalue));
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rc = pin2hash_if_kdf (app, 1, pinvalue, &pinlen);
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if (!rc)
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rc = iso7816_reset_retry_counter (app->slot, 0x81, pinvalue, pinlen);
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if (!rc && !app->app_local->extcap.is_v2)
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rc = iso7816_reset_retry_counter (app->slot, 0x82,
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pinvalue, strlen (pinvalue));
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rc = iso7816_reset_retry_counter (app->slot, 0x82, pinvalue, pinlen);
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}
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else if (!app->app_local->extcap.is_v2)
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{
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@ -2750,14 +2812,20 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
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pincb (pincb_arg, NULL, NULL); /* Dismiss the prompt. */
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}
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else
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{
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rc = pin2hash_if_kdf (app, chvno, oldpinvalue, &pinlen0);
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if (!rc)
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rc = pin2hash_if_kdf (app, chvno, pinvalue, &pinlen);
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if (!rc)
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rc = iso7816_change_reference_data (app->slot, 0x80 + chvno,
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oldpinvalue, strlen (oldpinvalue),
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pinvalue, strlen (pinvalue));
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oldpinvalue, pinlen0,
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pinvalue, pinlen);
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}
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}
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if (pinvalue)
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{
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wipememory (pinvalue, strlen (pinvalue));
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wipememory (pinvalue, pinlen);
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xfree (pinvalue);
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}
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if (rc)
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@ -2771,7 +2839,7 @@ do_change_pin (app_t app, ctrl_t ctrl, const char *chvnostr,
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}
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if (oldpinvalue)
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{
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wipememory (oldpinvalue, strlen (oldpinvalue));
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wipememory (oldpinvalue, pinlen0);
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xfree (oldpinvalue);
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}
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return rc;
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@ -4277,8 +4345,9 @@ do_sign (app_t app, const char *keyidstr, int hashalgo,
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if (!app->did_chv1 || app->force_chv1 )
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{
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char *pinvalue;
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int pinlen;
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rc = verify_a_chv (app, pincb, pincb_arg, 1, sigcount, &pinvalue);
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rc = verify_a_chv (app, pincb, pincb_arg, 1, sigcount, &pinvalue, &pinlen);
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if (rc)
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return rc;
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@ -4291,7 +4360,7 @@ do_sign (app_t app, const char *keyidstr, int hashalgo,
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pinpad has been used. */
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if (!app->did_chv2 && pinvalue && !app->app_local->extcap.is_v2)
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{
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rc = iso7816_verify (app->slot, 0x82, pinvalue, strlen (pinvalue));
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rc = iso7816_verify (app->slot, 0x82, pinvalue, pinlen);
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if (gpg_err_code (rc) == GPG_ERR_BAD_PIN)
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rc = gpg_error (GPG_ERR_PIN_NOT_SYNCED);
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if (rc)
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