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Diffstat (limited to 'openssl/crypto/asn1/x_bignum.c')
-rw-r--r--openssl/crypto/asn1/x_bignum.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/x_bignum.c b/openssl/crypto/asn1/x_bignum.c
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index 000000000..9cf3204a1
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+++ b/openssl/crypto/asn1/x_bignum.c
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+/* x_bignum.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) 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;
+}
+
+