Provide EC_curve_nid2nist() and EC_curve_nist2nid().

From OpenSSL.

Rides libcrypto bump.

ok miod@ (a while ago)

2 files changed, 57 insertions, 2 deletions

diff --git a/lib/libcrypto/ec/ec.h b/lib/libcrypto/ec/ec.h
index db0b99a8e9d..3b409ff92d1 100644
--- a/lib/libcrypto/ec/ec.h
+++ b/lib/libcrypto/ec/ec.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec.h,v 1.9 2014/06/12 15:49:29 deraadt Exp $ */
+/* $OpenBSD: ec.h,v 1.10 2015/06/20 13:26:08 jsing Exp $ */
 /*
  * Originally written by Bodo Moeller for the OpenSSL project.
  */
@@ -395,6 +395,8 @@ typedef struct {
  * are filled with the data of the first nitems internal groups */
 size_t EC_get_builtin_curves(EC_builtin_curve *r, size_t nitems);
 
+const char *EC_curve_nid2nist(int nid);
+int EC_curve_nist2nid(const char *name);
 
 /********************************************************************/
 /*                    EC_POINT functions                            */
diff --git a/lib/libcrypto/ec/ec_curve.c b/lib/libcrypto/ec/ec_curve.c
index d913867b760..9278e5593b4 100644
--- a/lib/libcrypto/ec/ec_curve.c
+++ b/lib/libcrypto/ec/ec_curve.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_curve.c,v 1.11 2015/02/09 01:12:03 doug Exp $ */
+/* $OpenBSD: ec_curve.c,v 1.12 2015/06/20 13:26:08 jsing Exp $ */
 /*
  * Written by Nils Larsch for the OpenSSL project.
  */
@@ -69,6 +69,8 @@
  *
  */
 
+#include <string.h>
+
 #include <openssl/opensslconf.h>
 
 #include "ec_lcl.h"
@@ -3285,3 +3287,54 @@ EC_get_builtin_curves(EC_builtin_curve * r, size_t nitems)
 
 	return curve_list_length;
 }
+
+/*
+ * Functions to translate between common NIST curve names and NIDs.
+ */
+
+typedef struct {
+	const char *name;	/* NIST Name of curve */
+	int nid;		/* Curve NID */
+} EC_NIST_NAME;
+
+static EC_NIST_NAME nist_curves[] = {
+	{ "B-163", NID_sect163r2 },
+	{ "B-233", NID_sect233r1 },
+	{ "B-283", NID_sect283r1 },
+	{ "B-409", NID_sect409r1 },
+	{ "B-571", NID_sect571r1 },
+	{ "K-163", NID_sect163k1 },
+	{ "K-233", NID_sect233k1 },
+	{ "K-283", NID_sect283k1 },
+	{ "K-409", NID_sect409k1 },
+	{ "K-571", NID_sect571k1 },
+	{ "P-192", NID_X9_62_prime192v1 },
+	{ "P-224", NID_secp224r1 },
+	{ "P-256", NID_X9_62_prime256v1 },
+	{ "P-384", NID_secp384r1 },
+	{ "P-521", NID_secp521r1 }
+};
+
+const char *
+EC_curve_nid2nist(int nid)
+{
+	size_t i;
+
+	for (i = 0; i < sizeof(nist_curves) / sizeof(EC_NIST_NAME); i++) {
+		if (nist_curves[i].nid == nid)
+			return (nist_curves[i].name);
+	}
+	return (NULL);
+}
+
+int
+EC_curve_nist2nid(const char *name)
+{
+	size_t i;
+
+	for (i = 0; i < sizeof(nist_curves) / sizeof(EC_NIST_NAME); i++) {
+		if (!strcmp(nist_curves[i].name, name))
+			return (nist_curves[i].nid);
+	}
+	return (NID_undef);
+}