1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/asn1.h> 58 59 #include <openssl/err.h> 60 #include <openssl/mem.h> 61 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 int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v) 69 { 70 int j,k; 71 unsigned int i; 72 unsigned char buf[sizeof(long)+1]; 73 long d; 74 75 a->type=V_ASN1_ENUMERATED; 76 if (a->length < (int)(sizeof(long)+1)) 77 { 78 if (a->data != NULL) 79 OPENSSL_free(a->data); 80 if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL) 81 memset((char *)a->data,0,sizeof(long)+1); 82 } 83 if (a->data == NULL) 84 { 85 OPENSSL_PUT_ERROR(ASN1, ASN1_ENUMERATED_set, ERR_R_MALLOC_FAILURE); 86 return(0); 87 } 88 d=v; 89 if (d < 0) 90 { 91 d= -d; 92 a->type=V_ASN1_NEG_ENUMERATED; 93 } 94 95 for (i=0; i<sizeof(long); i++) 96 { 97 if (d == 0) break; 98 buf[i]=(int)d&0xff; 99 d>>=8; 100 } 101 j=0; 102 for (k=i-1; k >=0; k--) 103 a->data[j++]=buf[k]; 104 a->length=j; 105 return(1); 106 } 107 108 long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a) 109 { 110 int neg=0,i; 111 long r=0; 112 113 if (a == NULL) return(0L); 114 i=a->type; 115 if (i == V_ASN1_NEG_ENUMERATED) 116 neg=1; 117 else if (i != V_ASN1_ENUMERATED) 118 return -1; 119 120 if (a->length > (int)sizeof(long)) 121 { 122 /* hmm... a bit ugly */ 123 return(0xffffffffL); 124 } 125 if (a->data == NULL) 126 return 0; 127 128 for (i=0; i<a->length; i++) 129 { 130 r<<=8; 131 r|=(unsigned char)a->data[i]; 132 } 133 if (neg) r= -r; 134 return(r); 135 } 136 137 ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai) 138 { 139 ASN1_ENUMERATED *ret; 140 int len,j; 141 142 if (ai == NULL) 143 ret=M_ASN1_ENUMERATED_new(); 144 else 145 ret=ai; 146 if (ret == NULL) 147 { 148 OPENSSL_PUT_ERROR(ASN1, BN_to_ASN1_ENUMERATED, ASN1_R_NESTED_ASN1_ERROR); 149 goto err; 150 } 151 if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED; 152 else ret->type=V_ASN1_ENUMERATED; 153 j=BN_num_bits(bn); 154 len=((j == 0)?0:((j/8)+1)); 155 if (ret->length < len+4) 156 { 157 unsigned char *new_data=OPENSSL_realloc(ret->data, len+4); 158 if (!new_data) 159 { 160 OPENSSL_PUT_ERROR(ASN1, BN_to_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE); 161 goto err; 162 } 163 ret->data=new_data; 164 } 165 166 ret->length=BN_bn2bin(bn,ret->data); 167 return(ret); 168 err: 169 if (ret != ai) M_ASN1_ENUMERATED_free(ret); 170 return(NULL); 171 } 172 173 BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn) 174 { 175 BIGNUM *ret; 176 177 if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL) 178 OPENSSL_PUT_ERROR(ASN1, ASN1_ENUMERATED_to_BN, ASN1_R_BN_LIB); 179 else if(ai->type == V_ASN1_NEG_ENUMERATED) BN_set_negative(ret,1); 180 return(ret); 181 } 182
