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scd: Fix zero-byte handling in ECC.

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* scd/app-openpgp.c (ecc_writekey): Don't remove zero-byte.

--

Fixes-commit: a25c99b156ca9acaa7712e9c09a6df0a7a23c833
GnuPG-bug-id: 5163
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2021-05-28 11:30:02 +09:00
parent 2b50f94267
commit 5b1806454c
1 changed files with 3 additions and 11 deletions
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14
scd/app-openpgp.c
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@ -4577,12 +4577,11 @@ ecc_writekey (app_t app, ctrl_t ctrl,
{
const unsigned char **buf2;
size_t *buf2len;
int native = flag_djb_tweak;
switch (*tok)
{
case 'q': buf2 = &ecc_q; buf2len = &ecc_q_len; break;
case 'd': buf2 = &ecc_d; buf2len = &ecc_d_len; native = 0; break;
case 'd': buf2 = &ecc_d; buf2len = &ecc_d_len; break;
default: buf2 = NULL; buf2len = NULL; break;
}
if (buf2 && *buf2)
@ -4594,11 +4593,6 @@ ecc_writekey (app_t app, ctrl_t ctrl,
goto leave;
if (tok && buf2)
{
if (!native)
/* Strip off leading zero bytes and save. */
for (;toklen && !*tok; toklen--, tok++)
;
*buf2 = tok;
*buf2len = toklen;
}
@ -4658,11 +4652,9 @@ ecc_writekey (app_t app, ctrl_t ctrl,
err = gpg_error (GPG_ERR_INV_VALUE);
goto leave;
}
if (flag_djb_tweak && keyno != 1)
algo = PUBKEY_ALGO_EDDSA;
else if (keyno == 1)
if (keyno == 1)
algo = PUBKEY_ALGO_ECDH;
else if (!strcmp (curve, "Ed448"))
else if (!strcmp (curve, "Ed25519") || !strcmp (curve, "Ed448"))
algo = PUBKEY_ALGO_EDDSA;
else
algo = PUBKEY_ALGO_ECDSA;