1 files changed, 174 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/x25519/ed25519_ref10.h b/third_party/heimdal/lib/hcrypto/x25519/ed25519_ref10.h
new file mode 100644
index 0000000..634dd2b
--- /dev/null
+++ b/third_party/heimdal/lib/hcrypto/x25519/ed25519_ref10.h
@@ -0,0 +1,174 @@
+/*
+ * ISC License
+ *
+ * Copyright (c) 2013-2019
+ * Frank Denis <j at pureftpd dot org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef ed25519_ref10_H
+#define ed25519_ref10_H
+
+#include <roken.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/*
+ fe means field element.
+ Here the field is \Z/(2^255-19).
+ */
+
+#ifdef HAVE_TI_MODE
+typedef uint64_t fe25519[5];
+#else
+typedef int32_t fe25519[10];
+#endif
+
+void fe25519_invert(fe25519 out, const fe25519 z);
+void fe25519_frombytes(fe25519 h, const unsigned char *s);
+void fe25519_tobytes(unsigned char *s, const fe25519 h);
+
+static inline int
+sodium_is_zero(const unsigned char *n, const size_t nlen)
+{
+    size_t                 i;
+    volatile unsigned char d = 0U;
+
+    for (i = 0U; i < nlen; i++) {
+        d |= n[i];
+    }
+    return 1 & ((d - 1) >> 8);
+}
+
+#ifdef HAVE_TI_MODE
+# include "ed25519_ref10_fe_51.h"
+#else
+# include "ed25519_ref10_fe_25_5.h"
+#endif
+
+
+/*
+ ge means group element.
+
+ Here the group is the set of pairs (x,y) of field elements
+ satisfying -x^2 + y^2 = 1 + d x^2y^2
+ where d = -121665/121666.
+
+ Representations:
+ ge25519_p2 (projective): (X:Y:Z) satisfying x=X/Z, y=Y/Z
+ ge25519_p3 (extended): (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT
+ ge25519_p1p1 (completed): ((X:Z),(Y:T)) satisfying x=X/Z, y=Y/T
+ ge25519_precomp (Duif): (y+x,y-x,2dxy)
+ */
+
+typedef struct {
+    fe25519 X;
+    fe25519 Y;
+    fe25519 Z;
+} ge25519_p2;
+
+typedef struct {
+    fe25519 X;
+    fe25519 Y;
+    fe25519 Z;
+    fe25519 T;
+} ge25519_p3;
+
+typedef struct {
+    fe25519 X;
+    fe25519 Y;
+    fe25519 Z;
+    fe25519 T;
+} ge25519_p1p1;
+
+typedef struct {
+    fe25519 yplusx;
+    fe25519 yminusx;
+    fe25519 xy2d;
+} ge25519_precomp;
+
+typedef struct {
+    fe25519 YplusX;
+    fe25519 YminusX;
+    fe25519 Z;
+    fe25519 T2d;
+} ge25519_cached;
+
+void ge25519_tobytes(unsigned char *s, const ge25519_p2 *h);
+
+void ge25519_p3_tobytes(unsigned char *s, const ge25519_p3 *h);
+
+int ge25519_frombytes(ge25519_p3 *h, const unsigned char *s);
+
+int ge25519_frombytes_negate_vartime(ge25519_p3 *h, const unsigned char *s);
+
+void ge25519_p3_to_cached(ge25519_cached *r, const ge25519_p3 *p);
+
+void ge25519_p1p1_to_p2(ge25519_p2 *r, const ge25519_p1p1 *p);
+
+void ge25519_p1p1_to_p3(ge25519_p3 *r, const ge25519_p1p1 *p);
+
+void ge25519_add(ge25519_p1p1 *r, const ge25519_p3 *p, const ge25519_cached *q);
+
+void ge25519_sub(ge25519_p1p1 *r, const ge25519_p3 *p, const ge25519_cached *q);
+
+void ge25519_scalarmult_base(ge25519_p3 *h, const unsigned char *a);
+
+void ge25519_double_scalarmult_vartime(ge25519_p2 *r, const unsigned char *a,
+                                       const ge25519_p3 *A,
+                                       const unsigned char *b);
+
+void ge25519_scalarmult(ge25519_p3 *h, const unsigned char *a,
+                        const ge25519_p3 *p);
+
+int ge25519_is_canonical(const unsigned char *s);
+
+int ge25519_is_on_curve(const ge25519_p3 *p);
+
+int ge25519_is_on_main_subgroup(const ge25519_p3 *p);
+
+int ge25519_has_small_order(const unsigned char s[32]);
+
+void ge25519_from_uniform(unsigned char s[32], const unsigned char r[32]);
+
+void ge25519_from_hash(unsigned char s[32], const unsigned char h[64]);
+
+/*
+ Ristretto group
+ */
+
+int ristretto255_frombytes(ge25519_p3 *h, const unsigned char *s);
+
+void ristretto255_p3_tobytes(unsigned char *s, const ge25519_p3 *h);
+
+void ristretto255_from_hash(unsigned char s[32], const unsigned char h[64]);
+
+/*
+ The set of scalars is \Z/l
+ where l = 2^252 + 27742317777372353535851937790883648493.
+ */
+
+void sc25519_invert(unsigned char recip[32], const unsigned char s[32]);
+
+void sc25519_reduce(unsigned char s[64]);
+
+void sc25519_mul(unsigned char s[32], const unsigned char a[32],
+                 const unsigned char b[32]);
+
+void sc25519_muladd(unsigned char s[32], const unsigned char a[32],
+                    const unsigned char b[32], const unsigned char c[32]);
+
+int sc25519_is_canonical(const unsigned char s[32]);
+
+#endif