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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>
+
+/*
+ * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
+ * for comments on encoding see a_int.c
+ */
+
+int i2d_ASN1_ENUMERATED(ASN1_ENUMERATED *a, unsigned char **pp)
+ {
+ int pad=0,ret,r,i,t;
+ unsigned char *p,*n,pb=0;
+
+ if ((a == NULL) || (a->data == NULL)) return(0);
+ t=a->type;
+ if (a->length == 0)
+ ret=1;
+ else
+ {
+ ret=a->length;
+ i=a->data[0];
+ if ((t == V_ASN1_ENUMERATED) && (i > 127)) {
+ pad=1;
+ pb=0;
+ } else if(t == V_ASN1_NEG_ENUMERATED) {
+ if(i>128) {
+ pad=1;
+ pb=0xFF;
+ } else if(i == 128) {
+ for(i = 1; i < a->length; i++) if(a->data[i]) {
+ pad=1;
+ pb=0xFF;
+ break;
+ }
+ }
+ }
+ ret+=pad;
+ }
+ r=ASN1_object_size(0,ret,V_ASN1_ENUMERATED);
+ if (pp == NULL) return(r);
+ p= *pp;
+
+ ASN1_put_object(&p,0,ret,V_ASN1_ENUMERATED,V_ASN1_UNIVERSAL);
+ if (pad) *(p++)=pb;
+ if (a->length == 0)
+ *(p++)=0;
+ else if (t == V_ASN1_ENUMERATED)
+ {
+ memcpy(p,a->data,(unsigned int)a->length);
+ p+=a->length;
+ }
+ else {
+ /* Begin at the end of the encoding */
+ n=a->data + a->length - 1;
+ p += a->length - 1;
+ i = a->length;
+ /* Copy zeros to destination as long as source is zero */
+ while(!*n) {
+ *(p--) = 0;
+ n--;
+ i--;
+ }
+ /* Complement and increment next octet */
+ *(p--) = ((*(n--)) ^ 0xff) + 1;
+ i--;
+ /* Complement any octets left */
+ for(;i > 0; i--) *(p--) = *(n--) ^ 0xff;
+ p += a->length;
+ }
+
+ *pp=p;
+ return(r);
+ }
+
+ASN1_ENUMERATED *d2i_ASN1_ENUMERATED(ASN1_ENUMERATED **a, unsigned char **pp,
+ long length)
+ {
+ ASN1_ENUMERATED *ret=NULL;
+ unsigned char *p,*to,*s;
+ long len;
+ int inf,tag,xclass;
+ int i;
+
+ if ((a == NULL) || ((*a) == NULL))
+ {
+ if ((ret=ASN1_ENUMERATED_new()) == NULL) return(NULL);
+ ret->type=V_ASN1_ENUMERATED;
+ }
+ else
+ ret=(*a);
+
+ p= *pp;
+ inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
+ if (inf & 0x80)
+ {
+ i=ASN1_R_BAD_OBJECT_HEADER;
+ goto err;
+ }
+
+ if (tag != V_ASN1_ENUMERATED)
+ {
+ i=ASN1_R_EXPECTING_AN_ENUMERATED;
+ goto err;
+ }
+
+ /* We must Malloc stuff, even for 0 bytes otherwise it
+ * signifies a missing NULL parameter. */
+ s=(unsigned char *)Malloc((int)len+1);
+ if (s == NULL)
+ {
+ i=ERR_R_MALLOC_FAILURE;
+ goto err;
+ }
+ to=s;
+ if (*p & 0x80) /* a negative number */
+ {
+ ret->type=V_ASN1_NEG_ENUMERATED;
+ if ((*p == 0xff) && (len != 1)) {
+ p++;
+ len--;
+ }
+ i = len;
+ p += i - 1;
+ to += i - 1;
+ while((!*p) && i) {
+ *(to--) = 0;
+ i--;
+ p--;
+ }
+ if(!i) {
+ *s = 1;
+ s[len] = 0;
+ p += len;
+ len++;
+ } else {
+ *(to--) = (*(p--) ^ 0xff) + 1;
+ i--;
+ for(;i > 0; i--) *(to--) = *(p--) ^ 0xff;
+ p += len;
+ }
+ } else {
+ ret->type=V_ASN1_ENUMERATED;
+ if ((*p == 0) && (len != 1))
+ {
+ p++;
+ len--;
+ }
+ memcpy(s,p,(int)len);
+ p+=len;
+ }
+
+ if (ret->data != NULL) Free((char *)ret->data);
+ ret->data=s;
+ ret->length=(int)len;
+ if (a != NULL) (*a)=ret;
+ *pp=p;
+ return(ret);
+err:
+ ASN1err(ASN1_F_D2I_ASN1_ENUMERATED,i);
+ if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+ ASN1_ENUMERATED_free(ret);
+ return(NULL);
+ }
+
+int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
+ {
+ int i,j,k;
+ unsigned char buf[sizeof(long)+1];
+ long d;
+
+ a->type=V_ASN1_ENUMERATED;
+ if (a->length < (sizeof(long)+1))
+ {
+ if (a->data != NULL)
+ Free((char *)a->data);
+ if ((a->data=(unsigned char *)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(0);
+
+ if (a->length > 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=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->neg) ret->type = V_ASN1_NEG_ENUMERATED;
+ else ret->type=V_ASN1_ENUMERATED;
+ j=BN_num_bits(bn);
+ len=((j == 0)?0:((j/8)+1));
+ ret->data=(unsigned char *)Malloc(len+4);
+ ret->length=BN_bn2bin(bn,ret->data);
+ return(ret);
+err:
+ if (ret != ai) 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);
+ if(ai->type == V_ASN1_NEG_ENUMERATED) bn->neg = 1;
+ return(ret);
+ }
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