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scd: do_decipher change for OpenPGPcard v3.0.

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* scd/app-openpgp.c (do_decipher): Add a header for ECDH.
This commit is contained in:
NIIBE Yutaka 2015-06-05 14:02:40 +09:00
parent a4a15195c2
commit cf508a1f7f
1 changed files with 21 additions and 3 deletions
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22
scd/app-openpgp.c
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@ -4046,6 +4046,7 @@ do_decipher (app_t app, const char *keyidstr,
int exmode, le_value;
unsigned char *fixbuf = NULL;
int padind = 0;
int fixuplen = 0;
if (!keyidstr || !*keyidstr || !indatalen)
return gpg_error (GPG_ERR_INV_VALUE);
@ -4092,8 +4093,6 @@ do_decipher (app_t app, const char *keyidstr,
if (app->app_local->keyattr[1].key_type == KEY_TYPE_RSA)
{
int fixuplen;
/* We might encounter a couple of leading zeroes in the
cryptogram. Due to internal use of MPIs these leading zeroes
are stripped. However the OpenPGP card expects exactly 128
@ -4146,7 +4145,26 @@ do_decipher (app_t app, const char *keyidstr,
}
}
else if (app->app_local->keyattr[1].key_type == KEY_TYPE_ECC)
{
fixuplen = 7;
fixbuf = xtrymalloc (fixuplen + indatalen);
if (!fixbuf)
return gpg_error_from_syserror ();
/* Build 'Cipher DO' */
fixbuf[0] = '\xa6';
fixbuf[1] = (char)(indatalen+5);
fixbuf[2] = '\x7f';
fixbuf[3] = '\x49';
fixbuf[4] = (char)(indatalen+2);
fixbuf[5] = '\x86';
fixbuf[6] = (char)indatalen;
memcpy (fixbuf+fixuplen, indata, indatalen);
indata = fixbuf;
indatalen = fixuplen + indatalen;
padind = -1;
}
else
return gpg_error (GPG_ERR_INV_VALUE);