1 /* crypto/asn1/a_enum.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include "cryptlib.h" 61 #include <openssl/asn1.h> 62 63 /* 64 * Code for ENUMERATED type: identical to INTEGER apart from a different tag. 65 * for comments on encoding see a_int.c 66 */ 67 68 ASN1_ENUMERATED *ASN1_ENUMERATED_new(void) 69 { return M_ASN1_ENUMERATED_new(); } 70 71 void ASN1_ENUMERATED_free(ASN1_ENUMERATED *x) 72 { M_ASN1_ENUMERATED_free(x); } 73 74 75 int i2d_ASN1_ENUMERATED(ASN1_ENUMERATED *a, unsigned char **pp) 76 { 77 int len, ret; 78 if(!a) return 0; 79 len = i2c_ASN1_INTEGER(a, NULL); 80 ret=ASN1_object_size(0,len,V_ASN1_ENUMERATED); 81 if(pp) { 82 ASN1_put_object(pp,0,len,V_ASN1_ENUMERATED,V_ASN1_UNIVERSAL); 83 i2c_ASN1_INTEGER(a, pp); 84 } 85 return ret; 86 } 87 88 ASN1_ENUMERATED *d2i_ASN1_ENUMERATED(ASN1_ENUMERATED **a, unsigned char **pp, 89 long length) 90 { 91 unsigned char *p; 92 long len; 93 int i; 94 int inf,tag,xclass; 95 ASN1_ENUMERATED *ret; 96 97 p= *pp; 98 inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 99 if (inf & 0x80) 100 { 101 i=ASN1_R_BAD_OBJECT_HEADER; 102 goto err; 103 } 104 105 if (tag != V_ASN1_ENUMERATED) 106 { 107 i=ASN1_R_EXPECTING_AN_ENUMERATED; 108 goto err; 109 } 110 ret = c2i_ASN1_INTEGER(a, &p, len); 111 if(ret) { 112 ret->type = (V_ASN1_NEG & ret->type) | V_ASN1_ENUMERATED; 113 *pp = p; 114 } 115 return ret; 116 err: 117 ASN1err(ASN1_F_D2I_ASN1_ENUMERATED,i); 118 return(NULL); 119 120 } 121 122 int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v) 123 { 124 int i,j,k; 125 unsigned char buf[sizeof(long)+1]; 126 long d; 127 128 a->type=V_ASN1_ENUMERATED; 129 if (a->length < (sizeof(long)+1)) 130 { 131 if (a->data != NULL) 132 OPENSSL_free(a->data); 133 if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL) 134 memset((char *)a->data,0,sizeof(long)+1); 135 } 136 if (a->data == NULL) 137 { 138 ASN1err(ASN1_F_ASN1_ENUMERATED_SET,ERR_R_MALLOC_FAILURE); 139 return(0); 140 } 141 d=v; 142 if (d < 0) 143 { 144 d= -d; 145 a->type=V_ASN1_NEG_ENUMERATED; 146 } 147 148 for (i=0; i<sizeof(long); i++) 149 { 150 if (d == 0) break; 151 buf[i]=(int)d&0xff; 152 d>>=8; 153 } 154 j=0; 155 for (k=i-1; k >=0; k--) 156 a->data[j++]=buf[k]; 157 a->length=j; 158 return(1); 159 } 160 161 long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a) 162 { 163 int neg=0,i; 164 long r=0; 165 166 if (a == NULL) return(0L); 167 i=a->type; 168 if (i == V_ASN1_NEG_ENUMERATED) 169 neg=1; 170 else if (i != V_ASN1_ENUMERATED) 171 return(0); 172 173 if (a->length > sizeof(long)) 174 { 175 /* hmm... a bit ugly */ 176 return(0xffffffffL); 177 } 178 if (a->data == NULL) 179 return(0); 180 181 for (i=0; i<a->length; i++) 182 { 183 r<<=8; 184 r|=(unsigned char)a->data[i]; 185 } 186 if (neg) r= -r; 187 return(r); 188 } 189 190 ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai) 191 { 192 ASN1_ENUMERATED *ret; 193 int len,j; 194 195 if (ai == NULL) 196 ret=M_ASN1_ENUMERATED_new(); 197 else 198 ret=ai; 199 if (ret == NULL) 200 { 201 ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR); 202 goto err; 203 } 204 if(bn->neg) ret->type = V_ASN1_NEG_ENUMERATED; 205 else ret->type=V_ASN1_ENUMERATED; 206 j=BN_num_bits(bn); 207 len=((j == 0)?0:((j/8)+1)); 208 ret->data=(unsigned char *)OPENSSL_malloc(len+4); 209 ret->length=BN_bn2bin(bn,ret->data); 210 return(ret); 211 err: 212 if (ret != ai) M_ASN1_ENUMERATED_free(ret); 213 return(NULL); 214 } 215 216 BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn) 217 { 218 BIGNUM *ret; 219 220 if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL) 221 ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN,ASN1_R_BN_LIB); 222 else if(ai->type == V_ASN1_NEG_ENUMERATED) ret->neg = 1; 223 return(ret); 224 } 225