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fix ecdsa

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NIIBE Yutaka
2013-02-21 17:18:02 +09:00
parent 256bd5ab99
commit 00fc3d71c1
2 changed files with 10 additions and 2 deletions
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4
ChangeLog
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@@ -1,3 +1,7 @@
2013-02-21 Niibe Yutaka <gniibe@fsij.org>
* src/call-ec_p256.c (ecdsa_sign): Fix secret key access.
2013-02-20 Niibe Yutaka <gniibe@fsij.org>
* src/openpgp.c (cmd_internal_authenticate): Support ECDSA for

8
src/call-ec_p256.c
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@@ -40,14 +40,18 @@ ecdsa_sign (const uint8_t *hash, uint8_t *output,
const struct key_data *kd)
{
int i;
bn256 r[1], s[1], z[1];
bn256 r[1], s[1], z[1], d[1];
uint8_t *p;
p = (uint8_t *)d;
for (i = 0; i < ECDSA_BYTE_SIZE; i++)
p[ECDSA_BYTE_SIZE - i - 1] = kd->data[i];
p = (uint8_t *)z;
for (i = 0; i < ECDSA_BYTE_SIZE; i++)
p[ECDSA_BYTE_SIZE - i - 1] = hash[i];
ecdsa (r, s, z, (const bn256 *)kd);
ecdsa (r, s, z, d);
p = (uint8_t *)r;
for (i = 0; i < ECDSA_BYTE_SIZE; i++)
*output++ = p[ECDSA_BYTE_SIZE - i - 1];