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include/libeosio/ec.hpp: adding ec_generate_privkey() and ec_get_publickey()

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This commit is contained in:
Henrik Hautakoski 2023-03-19 21:44:41 +01:00
parent 4b8c1c7733
commit 171876bbfa
4 changed files with 214 additions and 0 deletions
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61
src/openssl/ec.cpp
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@ -60,6 +60,67 @@ void ec_shutdown() {
}
}
int ec_generate_privkey(ec_privkey_t *priv) {
// Generate new private key.
if (EC_KEY_generate_key(k) == 0) {
return -1;
}
if (EC_KEY_priv2oct(k, priv->data(), EC_PRIVKEY_SIZE) == 0) {
return -1;
}
return 0;
}
// Calcualte a public key from a EC_KEY object.
int calculate_pubkey(EC_KEY *ec_key, ec_pubkey_t *pub) {
const BIGNUM* pk;
const EC_GROUP *group;
EC_POINT *point;
int rc;
// Get the curve (group) number first.
if ((group = EC_KEY_get0_group(ec_key)) == NULL) {
return 0;
}
// Then get the private key number
if ((pk = EC_KEY_get0_private_key(ec_key)) == NULL) {
return 0;
}
// Create a new point.
if ((point = EC_POINT_new(group)) == NULL) {
return 0;
}
// Multiply curve (group) and private key to get the public key.
rc = EC_POINT_mul(group, point, pk, NULL, NULL, ctx);
if (rc != 0) {
// Encode public key
rc = EC_POINT_point2oct(group, point, POINT_CONVERSION_COMPRESSED,
pub->data(), EC_PUBKEY_SIZE, ctx);
}
EC_POINT_free(point);
return rc;
}
int ec_get_publickey(const ec_privkey_t *priv, ec_pubkey_t* pub) {
const BIGNUM* n;
const EC_GROUP *group;
EC_POINT *point;
// Load private key
if (EC_KEY_oct2priv(k, priv->data(), EC_PRIVKEY_SIZE) == 0) {
return -1;
}
return calculate_pubkey(k, pub) == 0 ? -1 : 0;
}
int ec_generate_key(struct ec_keypair *pair) {