1 /* crypto/asn1/evp_asn1.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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)) 70 { 71 M_ASN1_OCTET_STRING_free(os); 72 return 0; 73 } 74 ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os); 75 return(1); 76 } 77 78 /* int max_len: for returned value */ 79 int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, 80 int max_len) 81 { 82 int ret,num; 83 unsigned char *p; 84 85 if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) 86 { 87 ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG); 88 return(-1); 89 } 90 p=M_ASN1_STRING_data(a->value.octet_string); 91 ret=M_ASN1_STRING_length(a->value.octet_string); 92 if (ret < max_len) 93 num=ret; 94 else 95 num=max_len; 96 memcpy(data,p,num); 97 return(ret); 98 } 99 100 int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data, 101 int len) 102 { 103 int n,size; 104 ASN1_OCTET_STRING os,*osp; 105 ASN1_INTEGER in; 106 unsigned char *p; 107 unsigned char buf[32]; /* when they have 256bit longs, 108 * I'll be in trouble */ 109 in.data=buf; 110 in.length=32; 111 os.data=data; 112 os.type=V_ASN1_OCTET_STRING; 113 os.length=len; 114 ASN1_INTEGER_set(&in,num); 115 n = i2d_ASN1_INTEGER(&in,NULL); 116 n+=M_i2d_ASN1_OCTET_STRING(&os,NULL); 117 118 size=ASN1_object_size(1,n,V_ASN1_SEQUENCE); 119 120 if ((osp=ASN1_STRING_new()) == NULL) return(0); 121 /* Grow the 'string' */ 122 if (!ASN1_STRING_set(osp,NULL,size)) 123 { 124 ASN1_STRING_free(osp); 125 return(0); 126 } 127 128 M_ASN1_STRING_length_set(osp, size); 129 p=M_ASN1_STRING_data(osp); 130 131 ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL); 132 i2d_ASN1_INTEGER(&in,&p); 133 M_i2d_ASN1_OCTET_STRING(&os,&p); 134 135 ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp); 136 return(1); 137 } 138 139 /* we return the actual length..., num may be missing, in which 140 * case, set it to zero */ 141 /* int max_len: for returned value */ 142 int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data, 143 int max_len) 144 { 145 int ret= -1,n; 146 ASN1_INTEGER *ai=NULL; 147 ASN1_OCTET_STRING *os=NULL; 148 const unsigned char *p; 149 long length; 150 ASN1_const_CTX c; 151 152 if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) 153 { 154 goto err; 155 } 156 p=M_ASN1_STRING_data(a->value.sequence); 157 length=M_ASN1_STRING_length(a->value.sequence); 158 159 c.pp= &p; 160 c.p=p; 161 c.max=p+length; 162 c.error=ASN1_R_DATA_IS_WRONG; 163 164 M_ASN1_D2I_start_sequence(); 165 c.q=c.p; 166 if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err; 167 c.slen-=(c.p-c.q); 168 c.q=c.p; 169 if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err; 170 c.slen-=(c.p-c.q); 171 if (!M_ASN1_D2I_end_sequence()) goto err; 172 173 if (num != NULL) 174 *num=ASN1_INTEGER_get(ai); 175 176 ret=M_ASN1_STRING_length(os); 177 if (max_len > ret) 178 n=ret; 179 else 180 n=max_len; 181 182 if (data != NULL) 183 memcpy(data,M_ASN1_STRING_data(os),n); 184 if (0) 185 { 186 err: 187 ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG); 188 } 189 if (os != NULL) M_ASN1_OCTET_STRING_free(os); 190 if (ai != NULL) M_ASN1_INTEGER_free(ai); 191 return(ret); 192 } 193 194
