1 files changed, 139 insertions, 0 deletions

diff --git a/src/lib/libcrypto/asn1/x_bignum.c b/src/lib/libcrypto/asn1/x_bignum.c
new file mode 100644
index 0000000000..869c05d931
--- /dev/null
+++ b/src/lib/libcrypto/asn1/x_bignum.c
@@ -0,0 +1,139 @@
+/* x_bignum.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 2000 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/asn1t.h>
+#include <openssl/bn.h>
+
+/* Custom primitive type for BIGNUM handling. This reads in an ASN1_INTEGER as a
+ * BIGNUM directly. Currently it ignores the sign which isn't a problem since all
+ * BIGNUMs used are non negative and anything that looks negative is normally due
+ * to an encoding error.
+ */
+
+#define BN_SENSITIVE    1
+
+static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
+static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
+
+static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
+static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
+
+static ASN1_PRIMITIVE_FUNCS bignum_pf = {
+        NULL, 0,
+        bn_new,
+        bn_free,
+        0,
+        bn_c2i,
+        bn_i2c
+};
+
+ASN1_ITEM_start(BIGNUM)
+        ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, 0, "BIGNUM"
+ASN1_ITEM_end(BIGNUM)
+
+ASN1_ITEM_start(CBIGNUM)
+        ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, BN_SENSITIVE, "BIGNUM"
+ASN1_ITEM_end(CBIGNUM)
+
+static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+        *pval = (ASN1_VALUE *)BN_new();
+        if(*pval) return 1;
+        else return 0;
+}
+
+static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+        if(!*pval) return;
+        if(it->size & BN_SENSITIVE) BN_clear_free((BIGNUM *)*pval);
+        else BN_free((BIGNUM *)*pval);
+        *pval = NULL;
+}
+
+static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it)
+{
+        BIGNUM *bn;
+        int pad;
+        if(!*pval) return -1;
+        bn = (BIGNUM *)*pval;
+        /* If MSB set in an octet we need a padding byte */
+        if(BN_num_bits(bn) & 0x7) pad = 0;
+        else pad = 1;
+        if(cont) {
+                if(pad) *cont++ = 0;
+                BN_bn2bin(bn, cont);
+        }
+        return pad + BN_num_bytes(bn);
+}
+
+static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
+                  int utype, char *free_cont, const ASN1_ITEM *it)
+{
+        BIGNUM *bn;
+        if(!*pval) bn_new(pval, it);
+        bn  = (BIGNUM *)*pval;
+        if(!BN_bin2bn(cont, len, bn)) {
+                bn_free(pval, it);
+                return 0;
+        }
+        return 1;
+}
+
+