Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/asn1/evp_asn1.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/asn1_mac.h> |
| 63 | |
| 64 | int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len) |
| 65 | { |
| 66 | ASN1_STRING *os; |
| 67 | |
| 68 | if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0); |
| 69 | if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0); |
| 70 | ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os); |
| 71 | return(1); |
| 72 | } |
| 73 | |
| 74 | /* int max_len: for returned value */ |
| 75 | int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, |
| 76 | int max_len) |
| 77 | { |
| 78 | int ret,num; |
| 79 | unsigned char *p; |
| 80 | |
| 81 | if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) |
| 82 | { |
| 83 | ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG); |
| 84 | return(-1); |
| 85 | } |
| 86 | p=M_ASN1_STRING_data(a->value.octet_string); |
| 87 | ret=M_ASN1_STRING_length(a->value.octet_string); |
| 88 | if (ret < max_len) |
| 89 | num=ret; |
| 90 | else |
| 91 | num=max_len; |
| 92 | memcpy(data,p,num); |
| 93 | return(ret); |
| 94 | } |
| 95 | |
| 96 | int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data, |
| 97 | int len) |
| 98 | { |
| 99 | int n,size; |
| 100 | ASN1_OCTET_STRING os,*osp; |
| 101 | ASN1_INTEGER in; |
| 102 | unsigned char *p; |
| 103 | unsigned char buf[32]; /* when they have 256bit longs, |
| 104 | * I'll be in trouble */ |
| 105 | in.data=buf; |
| 106 | in.length=32; |
| 107 | os.data=data; |
| 108 | os.type=V_ASN1_OCTET_STRING; |
| 109 | os.length=len; |
| 110 | ASN1_INTEGER_set(&in,num); |
| 111 | n = i2d_ASN1_INTEGER(&in,NULL); |
| 112 | n+=M_i2d_ASN1_OCTET_STRING(&os,NULL); |
| 113 | |
| 114 | size=ASN1_object_size(1,n,V_ASN1_SEQUENCE); |
| 115 | |
| 116 | if ((osp=ASN1_STRING_new()) == NULL) return(0); |
| 117 | /* Grow the 'string' */ |
| 118 | if (!ASN1_STRING_set(osp,NULL,size)) |
| 119 | { |
| 120 | ASN1_STRING_free(osp); |
| 121 | return(0); |
| 122 | } |
| 123 | |
| 124 | M_ASN1_STRING_length_set(osp, size); |
| 125 | p=M_ASN1_STRING_data(osp); |
| 126 | |
| 127 | ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL); |
| 128 | i2d_ASN1_INTEGER(&in,&p); |
| 129 | M_i2d_ASN1_OCTET_STRING(&os,&p); |
| 130 | |
| 131 | ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp); |
| 132 | return(1); |
| 133 | } |
| 134 | |
| 135 | /* we return the actual length..., num may be missing, in which |
| 136 | * case, set it to zero */ |
| 137 | /* int max_len: for returned value */ |
| 138 | int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data, |
| 139 | int max_len) |
| 140 | { |
| 141 | int ret= -1,n; |
| 142 | ASN1_INTEGER *ai=NULL; |
| 143 | ASN1_OCTET_STRING *os=NULL; |
| 144 | const unsigned char *p; |
| 145 | long length; |
| 146 | ASN1_const_CTX c; |
| 147 | |
| 148 | if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) |
| 149 | { |
| 150 | goto err; |
| 151 | } |
| 152 | p=M_ASN1_STRING_data(a->value.sequence); |
| 153 | length=M_ASN1_STRING_length(a->value.sequence); |
| 154 | |
| 155 | c.pp= &p; |
| 156 | c.p=p; |
| 157 | c.max=p+length; |
| 158 | c.error=ASN1_R_DATA_IS_WRONG; |
| 159 | |
| 160 | M_ASN1_D2I_start_sequence(); |
| 161 | c.q=c.p; |
| 162 | if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err; |
| 163 | c.slen-=(c.p-c.q); |
| 164 | c.q=c.p; |
| 165 | if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err; |
| 166 | c.slen-=(c.p-c.q); |
| 167 | if (!M_ASN1_D2I_end_sequence()) goto err; |
| 168 | |
| 169 | if (num != NULL) |
| 170 | *num=ASN1_INTEGER_get(ai); |
| 171 | |
| 172 | ret=M_ASN1_STRING_length(os); |
| 173 | if (max_len > ret) |
| 174 | n=ret; |
| 175 | else |
| 176 | n=max_len; |
| 177 | |
| 178 | if (data != NULL) |
| 179 | memcpy(data,M_ASN1_STRING_data(os),n); |
| 180 | if (0) |
| 181 | { |
| 182 | err: |
| 183 | ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG); |
| 184 | } |
| 185 | if (os != NULL) M_ASN1_OCTET_STRING_free(os); |
| 186 | if (ai != NULL) M_ASN1_INTEGER_free(ai); |
| 187 | return(ret); |
| 188 | } |
| 189 | |