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-rw-r--r--test/monniaux/BearSSL/src/ec/ec_pubkey.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/test/monniaux/BearSSL/src/ec/ec_pubkey.c b/test/monniaux/BearSSL/src/ec/ec_pubkey.c
new file mode 100644
index 00000000..383ff286
--- /dev/null
+++ b/test/monniaux/BearSSL/src/ec/ec_pubkey.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2018 Thomas Pornin <pornin@bolet.org>
+ *
+ * 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 "inner.h"
+
+static const unsigned char POINT_LEN[] = {
+ 0, /* 0: not a valid curve ID */
+ 43, /* sect163k1 */
+ 43, /* sect163r1 */
+ 43, /* sect163r2 */
+ 51, /* sect193r1 */
+ 51, /* sect193r2 */
+ 61, /* sect233k1 */
+ 61, /* sect233r1 */
+ 61, /* sect239k1 */
+ 73, /* sect283k1 */
+ 73, /* sect283r1 */
+ 105, /* sect409k1 */
+ 105, /* sect409r1 */
+ 145, /* sect571k1 */
+ 145, /* sect571r1 */
+ 41, /* secp160k1 */
+ 41, /* secp160r1 */
+ 41, /* secp160r2 */
+ 49, /* secp192k1 */
+ 49, /* secp192r1 */
+ 57, /* secp224k1 */
+ 57, /* secp224r1 */
+ 65, /* secp256k1 */
+ 65, /* secp256r1 */
+ 97, /* secp384r1 */
+ 133, /* secp521r1 */
+ 65, /* brainpoolP256r1 */
+ 97, /* brainpoolP384r1 */
+ 129, /* brainpoolP512r1 */
+ 32, /* curve25519 */
+ 56, /* curve448 */
+};
+
+/* see bearssl_ec.h */
+size_t
+br_ec_compute_pub(const br_ec_impl *impl, br_ec_public_key *pk,
+ void *kbuf, const br_ec_private_key *sk)
+{
+ int curve;
+ size_t len;
+
+ curve = sk->curve;
+ if (curve < 0 || curve >= 32 || curve >= (int)(sizeof POINT_LEN)
+ || ((impl->supported_curves >> curve) & 1) == 0)
+ {
+ return 0;
+ }
+ if (kbuf == NULL) {
+ return POINT_LEN[curve];
+ }
+ len = impl->mulgen(kbuf, sk->x, sk->xlen, curve);
+ if (pk != NULL) {
+ pk->curve = curve;
+ pk->q = kbuf;
+ pk->qlen = len;
+ }
+ return len;
+}