a_enum.c
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- /* crypto/asn1/a_enum.c */
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
- #include <stdio.h>
- #include "cryptlib.h"
- #include <openssl/asn1.h>
- #include <openssl/bn.h>
- /*
- * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
- * for comments on encoding see a_int.c
- */
- int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
- {
- int j,k;
- unsigned int i;
- unsigned char buf[sizeof(long)+1];
- long d;
- a->type=V_ASN1_ENUMERATED;
- if (a->length < (int)(sizeof(long)+1))
- {
- if (a->data != NULL)
- OPENSSL_free(a->data);
- if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
- memset((char *)a->data,0,sizeof(long)+1);
- }
- if (a->data == NULL)
- {
- ASN1err(ASN1_F_ASN1_ENUMERATED_SET,ERR_R_MALLOC_FAILURE);
- return(0);
- }
- d=v;
- if (d < 0)
- {
- d= -d;
- a->type=V_ASN1_NEG_ENUMERATED;
- }
- for (i=0; i<sizeof(long); i++)
- {
- if (d == 0) break;
- buf[i]=(int)d&0xff;
- d>>=8;
- }
- j=0;
- for (k=i-1; k >=0; k--)
- a->data[j++]=buf[k];
- a->length=j;
- return(1);
- }
- long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
- {
- int neg=0,i;
- long r=0;
- if (a == NULL) return(0L);
- i=a->type;
- if (i == V_ASN1_NEG_ENUMERATED)
- neg=1;
- else if (i != V_ASN1_ENUMERATED)
- return -1;
-
- if (a->length > (int)sizeof(long))
- {
- /* hmm... a bit ugly */
- return(0xffffffffL);
- }
- if (a->data == NULL)
- return 0;
- for (i=0; i<a->length; i++)
- {
- r<<=8;
- r|=(unsigned char)a->data[i];
- }
- if (neg) r= -r;
- return(r);
- }
- ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
- {
- ASN1_ENUMERATED *ret;
- int len,j;
- if (ai == NULL)
- ret=M_ASN1_ENUMERATED_new();
- else
- ret=ai;
- if (ret == NULL)
- {
- ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR);
- goto err;
- }
- if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED;
- else ret->type=V_ASN1_ENUMERATED;
- j=BN_num_bits(bn);
- len=((j == 0)?0:((j/8)+1));
- if (ret->length < len+4)
- {
- unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
- if (!new_data)
- {
- ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- ret->data=new_data;
- }
- ret->length=BN_bn2bin(bn,ret->data);
- return(ret);
- err:
- if (ret != ai) M_ASN1_ENUMERATED_free(ret);
- return(NULL);
- }
- BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
- {
- BIGNUM *ret;
- if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
- ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN,ASN1_R_BN_LIB);
- else if(ai->type == V_ASN1_NEG_ENUMERATED) BN_set_negative(ret,1);
- return(ret);
- }