HI
I tried the below code but still failed. below is my keys also
ec -in ec_key.pem -noout -text
read EC key
Private-Key: (224 bit)
priv:
00:ca:9e:dd:d8:f0:e0:48:35:2c:f7:82:33:24:61:
78:36:df:0d:83:8f:b6:02:97:b1:e3:29:4e:e4
pub:
04:ca:92:89:e7:00:51:43:28:64:89:e5:ed:36:2e:
65:64:76:dd:af:5e:ff:a4:ee:a2:d8:f5:94:e3:35:
a1:62:4a:8a:09:c7:45:0d:00:9d:a5:00:fd:72:21:
16:d4:b8:bb:74:d3:88:5c:9d:de:13:04
Can i load only private part of the key while signing the data?
In the below code check check itself failing.
Can you guide me? what worong here
static int loadkey_ecdsa()
36 {
37 BIGNUM start;
38 BIGNUM *res;
39 EC_KEY *pkey=EC_KEY_new_by_curve_name(NID_secp224r1);
40 BN_CTX *ctx;
41 int ret =0;
42 ERR_load_crypto_strings();
43 BN_init(&start);
44 ctx = BN_CTX_new();
45 EC_POINT *pub_key;
46 res = &start;
47 char b1[] =
"00ca9eddd8f0e048352cf7823324617836df0d838fb60297b1e3294ee4";
48 EC_GROUP *ecgroup= EC_GROUP_new_by_curve_name(NID_secp224r1);
49 int set_group_status = EC_KEY_set_group(pkey,ecgroup);
50 pub_key = EC_POINT_new(ecgroup);
51 BN_hex2bn(&res,b1);
52 EC_KEY_set_private_key(pkey, res);
53 res = BN_copy(res, EC_KEY_get0_private_key(pkey));
54
55 char *result_str = NULL;
56 if(res == NULL)
57 {
58 printf("hello");
59 }
60 result_str = BN_bn2hex(res);
61 if(result_str == NULL)
62 {
63 printf("hello");
64 }
65 char err[120];
66 printf("%s\n",result_str );
67
68 if (!EC_KEY_check_key(pkey)) {
69 printf("EC_KEY_check_key failed:\n");
70 printf("%d%s\n",__LINE__,ERR_error_string(ERR_get_error(),err));
71 printf("and erro is %s\n",err);
72 } else {
73 printf("Public key verified OK\n");
74 }
75
76 BN_free(res);
77
78 BN_CTX_free(ctx);
79 }
On 14 December 2012 15:00, Dave Thompson <[email protected]> wrote:
> openssl ecparam -out ec_key.pem -name secp224r1 -genkey
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