Use Ed25519 keys.

[tinc] / src / ed25519 / ecdsa.c

diff --git a/src/ed25519/ecdsa.c b/src/ed25519/ecdsa.c
new file mode 100644 (file)
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--- /dev/null
+++ b/src/ed25519/ecdsa.c
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+/*
+    ecdsa.c -- ECDSA key handling
+    Copyright (C) 2011-2013 Guus Sliepen <guus@tinc-vpn.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "../system.h"
+
+#include "ed25519.h"
+
+#define __TINC_ECDSA_INTERNAL__
+typedef struct {
+       uint8_t private[64];
+       uint8_t public[32];
+} ecdsa_t;
+
+#include "../logger.h"
+#include "../ecdsa.h"
+#include "../utils.h"
+#include "../xalloc.h"
+
+// Get and set ECDSA keys
+//
+ecdsa_t *ecdsa_set_base64_public_key(const char *p) {
+       int len = strlen(p);
+
+       if(len != 43) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Invalid size %s for public key!", len);
+               return 0;
+       }
+
+       ecdsa_t *ecdsa = xzalloc(sizeof *ecdsa);
+       len = b64decode(p, ecdsa->public, len);
+       if(len != 32) {
+               logger(DEBUG_ALWAYS, LOG_ERR, "Invalid format of public key! len = %d", len);
+               free(ecdsa);
+               return 0;
+       }
+
+       return ecdsa;
+}
+
+char *ecdsa_get_base64_public_key(ecdsa_t *ecdsa) {
+       char *base64 = xmalloc(44);
+       b64encode(ecdsa->public, base64, sizeof ecdsa->public);
+
+       return base64;
+}
+
+// Read PEM ECDSA keys
+
+ecdsa_t *ecdsa_read_pem_public_key(FILE *fp) {
+       ecdsa_t *ecdsa = xzalloc(sizeof *ecdsa);
+       if(fread(ecdsa->public, sizeof ecdsa->public, 1, fp) == 1)
+               return ecdsa;
+       free(ecdsa);
+       return 0;
+}
+
+ecdsa_t *ecdsa_read_pem_private_key(FILE *fp) {
+       ecdsa_t *ecdsa = xmalloc(sizeof *ecdsa);
+       if(fread(ecdsa, sizeof *ecdsa, 1, fp) == 1)
+               return ecdsa;
+       free(ecdsa);
+       return 0;
+}
+
+size_t ecdsa_size(ecdsa_t *ecdsa) {
+       return 64;
+}
+
+// TODO: standardise output format?
+
+bool ecdsa_sign(ecdsa_t *ecdsa, const void *in, size_t len, void *sig) {
+       ed25519_sign(sig, in, len, ecdsa->public, ecdsa->private);
+       return true;
+}
+
+bool ecdsa_verify(ecdsa_t *ecdsa, const void *in, size_t len, const void *sig) {
+       return ed25519_verify(sig, in, len, ecdsa->public);
+}
+
+bool ecdsa_active(ecdsa_t *ecdsa) {
+       return ecdsa;
+}
+
+void ecdsa_free(ecdsa_t *ecdsa) {
+       free(ecdsa);
+}