Initial Commit

src/openssl/ec.cpp

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+/**
+ * MIT License
+ *
+ * Copyright (c) 2019-2020 EOS Sw/eden
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <openssl/ec.h>
+#include <openssl/bn.h>
+#include <openssl/hmac.h>
+#include <libeosio/ec.h>
+
+namespace libeosio {
+
+int ec_generate_key(struct ec_keypair *pair) {
+
+	int ret = -1;
+	EC_KEY *k;
+	BN_CTX *ctx;
+
+	// Create BIGNUM context.
+	ctx = BN_CTX_new();
+	if (ctx == NULL) {
+		return -1;
+	}
+
+	// Construct curve.
+	k = EC_KEY_new_by_curve_name(NID_secp256k1);
+	if (k == NULL) {
+		goto fail1;
+	}
+
+	// Generate new key pair.
+	if (EC_KEY_generate_key(k) != 1)  {
+		goto fail2;
+	}
+
+	// Copy private key to binary format.
+	EC_KEY_priv2oct(k, pair->secret.data(), EC_PRIVKEY_SIZE);
+
+	// Copy public key
+	EC_POINT_point2oct(EC_KEY_get0_group(k),
+		EC_KEY_get0_public_key(k), POINT_CONVERSION_COMPRESSED,
+	   	pair->pub.data(), EC_PUBKEY_SIZE, ctx);
+
+	ret = 0;
+fail2:
+	EC_KEY_free(k);
+fail1:
+	BN_CTX_free(ctx);
+	return ret;
+}
+
+} // namespace libeosio