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 <string.h> 60 61 #include <openssl/err.h> 62 #include <openssl/mem.h> 63 64 #include "../internal.h" 65 66 67 /* 68 * Code for ENUMERATED type: identical to INTEGER apart from a different tag. 69 * for comments on encoding see a_int.c 70 */ 71 72 int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v) 73 { 74 int j, k; 75 unsigned int i; 76 unsigned char buf[sizeof(long) + 1]; 77 long d; 78 79 a->type = V_ASN1_ENUMERATED; 80 if (a->length < (int)(sizeof(long) + 1)) { 81 if (a->data != NULL) 82 OPENSSL_free(a->data); 83 if ((a->data = 84 (unsigned char *)OPENSSL_malloc(sizeof(long) + 1)) != NULL) 85 OPENSSL_memset((char *)a->data, 0, sizeof(long) + 1); 86 } 87 if (a->data == NULL) { 88 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 89 return (0); 90 } 91 d = v; 92 if (d < 0) { 93 d = -d; 94 a->type = V_ASN1_NEG_ENUMERATED; 95 } 96 97 for (i = 0; i < sizeof(long); i++) { 98 if (d == 0) 99 break; 100 buf[i] = (int)d & 0xff; 101 d >>= 8; 102 } 103 j = 0; 104 for (k = i - 1; k >= 0; k--) 105 a->data[j++] = buf[k]; 106 a->length = j; 107 return (1); 108 } 109 110 long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a) 111 { 112 int neg = 0, i; 113 long r = 0; 114 115 if (a == NULL) 116 return (0L); 117 i = a->type; 118 if (i == V_ASN1_NEG_ENUMERATED) 119 neg = 1; 120 else if (i != V_ASN1_ENUMERATED) 121 return -1; 122 123 if (a->length > (int)sizeof(long)) { 124 /* hmm... a bit ugly */ 125 return (0xffffffffL); 126 } 127 if (a->data == NULL) 128 return 0; 129 130 for (i = 0; i < a->length; i++) { 131 r <<= 8; 132 r |= (unsigned char)a->data[i]; 133 } 134 if (neg) 135 r = -r; 136 return (r); 137 } 138 139 ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai) 140 { 141 ASN1_ENUMERATED *ret; 142 int len, j; 143 144 if (ai == NULL) 145 ret = M_ASN1_ENUMERATED_new(); 146 else 147 ret = ai; 148 if (ret == NULL) { 149 OPENSSL_PUT_ERROR(ASN1, ASN1_R_NESTED_ASN1_ERROR); 150 goto err; 151 } 152 if (BN_is_negative(bn)) 153 ret->type = V_ASN1_NEG_ENUMERATED; 154 else 155 ret->type = V_ASN1_ENUMERATED; 156 j = BN_num_bits(bn); 157 len = ((j == 0) ? 0 : ((j / 8) + 1)); 158 if (ret->length < len + 4) { 159 unsigned char *new_data = OPENSSL_realloc(ret->data, len + 4); 160 if (!new_data) { 161 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 162 goto err; 163 } 164 ret->data = new_data; 165 } 166 167 ret->length = BN_bn2bin(bn, ret->data); 168 return (ret); 169 err: 170 if (ret != ai) 171 M_ASN1_ENUMERATED_free(ret); 172 return (NULL); 173 } 174 175 BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn) 176 { 177 BIGNUM *ret; 178 179 if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL) 180 OPENSSL_PUT_ERROR(ASN1, ASN1_R_BN_LIB); 181 else if (ai->type == V_ASN1_NEG_ENUMERATED) 182 BN_set_negative(ret, 1); 183 return (ret); 184 } 185
