Where did you get the hex version of the point?
It does not look correct, its the wrong length.
For the curve you picked, The field size is 21 bytes.
The hex should be 04|x|y which would be 43 bytes, so string
should be 86 bytes with a leading 04.
On 12/13/2012 12:23 AM, jeetendra gangele wrote:
Hi
I have written below code but it always failed with
EC_KEY_check_key failed:
error:100A0066:lib(16):func(160):reason(102)
1 #include <stdio.h>
2 #include "openssl/sha.h"
3 #include <time.h>
4
5 #include <openssl/ecdsa.h>
6 #include <openssl/obj_mac.h>
7 #include <openssl/aes.h>
8 #include <openssl/ecdh.h>
9 #include <openssl/rand.h>
10 #include <string.h>
11 #include <openssl/ecdh.h>
12 #include <openssl/bn.h>
13 int main()
14 {
15 EC_KEY *key = NULL;
16 EC_POINT *pub_key;
17 const EC_GROUP *group;
18
19
20 key = EC_KEY_new_by_curve_name(NID_sect163k1);
21 group = EC_KEY_get0_group(key);
22 pub_key = EC_POINT_new(group);
23
24 EC_POINT_hex2point(group,
25
"369368AF243193D001E39CE76BB1D5DA08A9BC0A63307AB352338E5EA5C0E05A0C2531866F3E3C2702",
pub_key, NULL);
26
27 EC_KEY_set_public_key(key, pub_key);
28
29 if (!EC_KEY_check_key(key)) {
30 printf("EC_KEY_check_key failed:\n");
31 printf("%s\n",ERR_error_string(ERR_get_error(),NULL));
32 } else {
33 printf("Public key verified OK\n");
34 }
35 return 1;
36 }
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