From ae3506413067af8d209d16ffc10c2e7c99dc6bba Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Sun, 3 Jan 2016 08:14:17 +1100
Subject: bignum: Add fromBinary constructor

Closes #44
---
 src/openssl.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/openssl.c b/src/openssl.c
index 82f3298..0a444c8 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -1598,6 +1598,17 @@ static int bn_new(lua_State *L) {
 } /* bn_new() */
 
 
+static int bn_fromBinary(lua_State *L) {
+	size_t len;
+	const char *s = luaL_checklstring(L, 1, &len);
+	BIGNUM *bn = bn_push(L);
+	if (!BN_bin2bn((const unsigned char*)s, len, bn)) {
+		auxL_error(L, auxL_EOPENSSL, "bignum");
+	}
+	return 1;
+} /* bn_fromBinary() */
+
+
 static int bn_interpose(lua_State *L) {
 	return interpose(L, BIGNUM_CLASS);
 } /* bn_interpose() */
@@ -2119,6 +2130,7 @@ static const luaL_Reg bn_metatable[] = {
 static const luaL_Reg bn_globals[] = {
 	{ "new",           &bn_new },
 	{ "interpose",     &bn_interpose },
+	{ "fromBinary",    &bn_fromBinary },
 	{ "generatePrime", &bn_generatePrime },
 	{ NULL,            NULL },
 };
-- 
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