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diff --git a/lib/openssl/crypto/rsa/rsa_x931.c b/lib/openssl/crypto/rsa/rsa_x931.c
new file mode 100644
index 0000000..21548e3
--- /dev/null
+++ b/lib/openssl/crypto/rsa/rsa_x931.c
@@ -0,0 +1,177 @@
+/* rsa_x931.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2005.
+ */
+/* ====================================================================
+ * Copyright (c) 2005 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+
+int RSA_padding_add_X931(unsigned char *to, int tlen,
+	     const unsigned char *from, int flen)
+	{
+	int j;
+	unsigned char *p;
+
+	/* Absolute minimum amount of padding is 1 header nibble, 1 padding
+	 * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
+	 */
+
+	j = tlen - flen - 2;
+
+	if (j < 0)
+		{
+		RSAerr(RSA_F_RSA_PADDING_ADD_X931,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
+		return -1;
+		}
+	
+	p=(unsigned char *)to;
+
+	/* If no padding start and end nibbles are in one byte */
+	if (j == 0)
+		*p++ = 0x6A;
+	else
+		{
+		*p++ = 0x6B;
+		if (j > 1)
+			{
+			memset(p, 0xBB, j - 1);
+			p += j - 1;
+			}
+		*p++ = 0xBA;
+		}
+	memcpy(p,from,(unsigned int)flen);
+	p += flen;
+	*p = 0xCC;
+	return(1);
+	}
+
+int RSA_padding_check_X931(unsigned char *to, int tlen,
+	     const unsigned char *from, int flen, int num)
+	{
+	int i = 0,j;
+	const unsigned char *p;
+
+	p=from;
+	if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B)))
+		{
+		RSAerr(RSA_F_RSA_PADDING_CHECK_X931,RSA_R_INVALID_HEADER);
+		return -1;
+		}
+
+	if (*p++ == 0x6B)
+		{
+		j=flen-3;
+		for (i = 0; i < j; i++)
+			{
+			unsigned char c = *p++;
+			if (c == 0xBA)
+				break;
+			if (c != 0xBB)
+				{
+				RSAerr(RSA_F_RSA_PADDING_CHECK_X931,
+					RSA_R_INVALID_PADDING);
+				return -1;
+				}
+			}
+
+		j -= i;
+
+		if (i == 0)
+			{
+			RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
+			return -1;
+			}
+
+		}
+	else j = flen - 2;
+
+	if (p[j] != 0xCC)
+		{
+		RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
+		return -1;
+		}
+
+	memcpy(to,p,(unsigned int)j);
+
+	return(j);
+	}
+
+/* Translate between X931 hash ids and NIDs */
+
+int RSA_X931_hash_id(int nid)
+	{
+	switch (nid)
+		{
+		case NID_sha1:
+		return 0x33;
+
+		case NID_sha256:
+		return 0x34;
+
+		case NID_sha384:
+		return 0x36;
+
+		case NID_sha512:
+		return 0x35;
+
+		}
+	return -1;
+	}
+