The Android Open Source Project | 656d9c7 | 2009-03-03 19:30:25 -0800 | [diff] [blame] | 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 | #include <openssl/bn.h> |
| 63 | |
| 64 | /* |
| 65 | * Code for ENUMERATED type: identical to INTEGER apart from a different tag. |
| 66 | * for comments on encoding see a_int.c |
| 67 | */ |
| 68 | |
| 69 | int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v) |
| 70 | { |
| 71 | int j,k; |
| 72 | unsigned int i; |
| 73 | unsigned char buf[sizeof(long)+1]; |
| 74 | long d; |
| 75 | |
| 76 | a->type=V_ASN1_ENUMERATED; |
| 77 | if (a->length < (int)(sizeof(long)+1)) |
| 78 | { |
| 79 | if (a->data != NULL) |
| 80 | OPENSSL_free(a->data); |
| 81 | if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL) |
| 82 | memset((char *)a->data,0,sizeof(long)+1); |
| 83 | } |
| 84 | if (a->data == NULL) |
| 85 | { |
| 86 | ASN1err(ASN1_F_ASN1_ENUMERATED_SET,ERR_R_MALLOC_FAILURE); |
| 87 | return(0); |
| 88 | } |
| 89 | d=v; |
| 90 | if (d < 0) |
| 91 | { |
| 92 | d= -d; |
| 93 | a->type=V_ASN1_NEG_ENUMERATED; |
| 94 | } |
| 95 | |
| 96 | for (i=0; i<sizeof(long); i++) |
| 97 | { |
| 98 | if (d == 0) break; |
| 99 | buf[i]=(int)d&0xff; |
| 100 | d>>=8; |
| 101 | } |
| 102 | j=0; |
| 103 | for (k=i-1; k >=0; k--) |
| 104 | a->data[j++]=buf[k]; |
| 105 | a->length=j; |
| 106 | return(1); |
| 107 | } |
| 108 | |
| 109 | long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a) |
| 110 | { |
| 111 | int neg=0,i; |
| 112 | long r=0; |
| 113 | |
| 114 | if (a == NULL) return(0L); |
| 115 | i=a->type; |
| 116 | if (i == V_ASN1_NEG_ENUMERATED) |
| 117 | neg=1; |
| 118 | else if (i != V_ASN1_ENUMERATED) |
| 119 | return -1; |
| 120 | |
| 121 | if (a->length > (int)sizeof(long)) |
| 122 | { |
| 123 | /* hmm... a bit ugly */ |
| 124 | return(0xffffffffL); |
| 125 | } |
| 126 | if (a->data == NULL) |
| 127 | return 0; |
| 128 | |
| 129 | for (i=0; i<a->length; i++) |
| 130 | { |
| 131 | r<<=8; |
| 132 | r|=(unsigned char)a->data[i]; |
| 133 | } |
| 134 | if (neg) r= -r; |
| 135 | return(r); |
| 136 | } |
| 137 | |
| 138 | ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai) |
| 139 | { |
| 140 | ASN1_ENUMERATED *ret; |
| 141 | int len,j; |
| 142 | |
| 143 | if (ai == NULL) |
| 144 | ret=M_ASN1_ENUMERATED_new(); |
| 145 | else |
| 146 | ret=ai; |
| 147 | if (ret == NULL) |
| 148 | { |
| 149 | ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR); |
| 150 | goto err; |
| 151 | } |
| 152 | if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED; |
| 153 | else ret->type=V_ASN1_ENUMERATED; |
| 154 | j=BN_num_bits(bn); |
| 155 | len=((j == 0)?0:((j/8)+1)); |
| 156 | if (ret->length < len+4) |
| 157 | { |
| 158 | unsigned char *new_data=OPENSSL_realloc(ret->data, len+4); |
| 159 | if (!new_data) |
| 160 | { |
| 161 | ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,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) M_ASN1_ENUMERATED_free(ret); |
| 171 | return(NULL); |
| 172 | } |
| 173 | |
| 174 | BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn) |
| 175 | { |
| 176 | BIGNUM *ret; |
| 177 | |
| 178 | if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL) |
| 179 | ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN,ASN1_R_BN_LIB); |
| 180 | else if(ai->type == V_ASN1_NEG_ENUMERATED) BN_set_negative(ret,1); |
| 181 | return(ret); |
| 182 | } |