start on ecdsa keys

1 files changed, 53 insertions, 0 deletions

diff --git a/ecdsa.c b/ecdsa.c
new file mode 100644
index 0000000..b29ef1f
--- /dev/null
+++ b/ecdsa.c
@@ -0,0 +1,53 @@
+#include "includes.h"
+#include "dbutil.h"
+#include "crypto_desc.h"
+
+#ifdef DROPBEAR_ECDSA
+
+ecc_key *gen_ecdsa_priv_key(unsigned int bit_size) {
+	const ltc_ecc_set_type *dp = NULL; // curve domain parameters
+	// TODO: use raw bytes for the dp rather than the hex strings in libtomcrypt's ecc.c
+	switch (bit_size) {
+#ifdef DROPBEAR_ECC_256
+		case 256:
+			dp = &ltc_ecc_sets[0];
+			break;
+#endif
+#ifdef DROPBEAR_ECC_384
+		case 384:
+			dp = &ltc_ecc_sets[0];
+			break;
+#endif
+#ifdef DROPBEAR_ECC_521
+		case 521:
+			dp = &ltc_ecc_sets[0];
+			break;
+#endif
+	}
+	if (!dp) {
+		dropbear_exit("Key size %d isn't valid. Try "
+#ifdef DROPBEAR_ECC_256
+			"256 "
+#endif
+#ifdef DROPBEAR_ECC_384
+			"384 "
+#endif
+#ifdef DROPBEAR_ECC_521
+			"521 "
+#endif
+			, bit_size);
+	}
+
+	ecc_key *new_key = m_malloc(sizeof(*new_key));
+	if (ecc_make_key_ex(NULL, dropbear_ltc_prng, new_key, dp) != CRYPT_OK) {
+		dropbear_exit("ECC error");
+	}
+	return new_key;
+}
+
+int buf_get_ecdsa_pub_key(buffer* buf, ecc_key *key) {
+
+}
+
+
+#endif // DROPBEAR_ECDSA