155714Skris/* crypto/asn1/evp_asn1.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280304Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280304Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280304Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280304Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280304Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/asn1.h> 6255714Skris#include <openssl/asn1_mac.h> 6355714Skris 6455714Skrisint ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len) 65280304Sjkim{ 66280304Sjkim ASN1_STRING *os; 6755714Skris 68280304Sjkim if ((os = M_ASN1_OCTET_STRING_new()) == NULL) 69280304Sjkim return (0); 70280304Sjkim if (!M_ASN1_OCTET_STRING_set(os, data, len)) { 71280304Sjkim M_ASN1_OCTET_STRING_free(os); 72280304Sjkim return 0; 73280304Sjkim } 74280304Sjkim ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os); 75280304Sjkim return (1); 76280304Sjkim} 7755714Skris 7855714Skris/* int max_len: for returned value */ 79280304Sjkimint ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len) 80280304Sjkim{ 81280304Sjkim int ret, num; 82280304Sjkim unsigned char *p; 8355714Skris 84280304Sjkim if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) { 85280304Sjkim ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING, ASN1_R_DATA_IS_WRONG); 86280304Sjkim return (-1); 87280304Sjkim } 88280304Sjkim p = M_ASN1_STRING_data(a->value.octet_string); 89280304Sjkim ret = M_ASN1_STRING_length(a->value.octet_string); 90280304Sjkim if (ret < max_len) 91280304Sjkim num = ret; 92280304Sjkim else 93280304Sjkim num = max_len; 94280304Sjkim memcpy(data, p, num); 95280304Sjkim return (ret); 96280304Sjkim} 9755714Skris 9855714Skrisint ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data, 99280304Sjkim int len) 100280304Sjkim{ 101280304Sjkim int n, size; 102280304Sjkim ASN1_OCTET_STRING os, *osp; 103280304Sjkim ASN1_INTEGER in; 104280304Sjkim unsigned char *p; 105280304Sjkim unsigned char buf[32]; /* when they have 256bit longs, I'll be in 106280304Sjkim * trouble */ 107280304Sjkim in.data = buf; 108280304Sjkim in.length = 32; 109280304Sjkim os.data = data; 110280304Sjkim os.type = V_ASN1_OCTET_STRING; 111280304Sjkim os.length = len; 112280304Sjkim ASN1_INTEGER_set(&in, num); 113280304Sjkim n = i2d_ASN1_INTEGER(&in, NULL); 114280304Sjkim n += M_i2d_ASN1_OCTET_STRING(&os, NULL); 11555714Skris 116280304Sjkim size = ASN1_object_size(1, n, V_ASN1_SEQUENCE); 11755714Skris 118280304Sjkim if ((osp = ASN1_STRING_new()) == NULL) 119280304Sjkim return (0); 120280304Sjkim /* Grow the 'string' */ 121280304Sjkim if (!ASN1_STRING_set(osp, NULL, size)) { 122280304Sjkim ASN1_STRING_free(osp); 123280304Sjkim return (0); 124280304Sjkim } 12555714Skris 126280304Sjkim M_ASN1_STRING_length_set(osp, size); 127280304Sjkim p = M_ASN1_STRING_data(osp); 12855714Skris 129280304Sjkim ASN1_put_object(&p, 1, n, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL); 130280304Sjkim i2d_ASN1_INTEGER(&in, &p); 131280304Sjkim M_i2d_ASN1_OCTET_STRING(&os, &p); 13255714Skris 133280304Sjkim ASN1_TYPE_set(a, V_ASN1_SEQUENCE, osp); 134280304Sjkim return (1); 135280304Sjkim} 13655714Skris 137280304Sjkim/* 138280304Sjkim * we return the actual length..., num may be missing, in which case, set it 139280304Sjkim * to zero 140280304Sjkim */ 14155714Skris/* int max_len: for returned value */ 142280304Sjkimint ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, 143280304Sjkim unsigned char *data, int max_len) 144280304Sjkim{ 145280304Sjkim int ret = -1, n; 146280304Sjkim ASN1_INTEGER *ai = NULL; 147280304Sjkim ASN1_OCTET_STRING *os = NULL; 148280304Sjkim const unsigned char *p; 149280304Sjkim long length; 150280304Sjkim ASN1_const_CTX c; 15155714Skris 152280304Sjkim if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) { 153280304Sjkim goto err; 154280304Sjkim } 155280304Sjkim p = M_ASN1_STRING_data(a->value.sequence); 156280304Sjkim length = M_ASN1_STRING_length(a->value.sequence); 15755714Skris 158280304Sjkim c.pp = &p; 159280304Sjkim c.p = p; 160280304Sjkim c.max = p + length; 161280304Sjkim c.error = ASN1_R_DATA_IS_WRONG; 16255714Skris 163280304Sjkim M_ASN1_D2I_start_sequence(); 164280304Sjkim c.q = c.p; 165280304Sjkim if ((ai = d2i_ASN1_INTEGER(NULL, &c.p, c.slen)) == NULL) 166280304Sjkim goto err; 167280304Sjkim c.slen -= (c.p - c.q); 168280304Sjkim c.q = c.p; 169280304Sjkim if ((os = d2i_ASN1_OCTET_STRING(NULL, &c.p, c.slen)) == NULL) 170280304Sjkim goto err; 171280304Sjkim c.slen -= (c.p - c.q); 172280304Sjkim if (!M_ASN1_D2I_end_sequence()) 173280304Sjkim goto err; 17455714Skris 175280304Sjkim if (num != NULL) 176280304Sjkim *num = ASN1_INTEGER_get(ai); 17755714Skris 178280304Sjkim ret = M_ASN1_STRING_length(os); 179280304Sjkim if (max_len > ret) 180280304Sjkim n = ret; 181280304Sjkim else 182280304Sjkim n = max_len; 18355714Skris 184280304Sjkim if (data != NULL) 185280304Sjkim memcpy(data, M_ASN1_STRING_data(os), n); 186280304Sjkim if (0) { 187280304Sjkim err: 188280304Sjkim ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING, ASN1_R_DATA_IS_WRONG); 189280304Sjkim } 190280304Sjkim if (os != NULL) 191280304Sjkim M_ASN1_OCTET_STRING_free(os); 192280304Sjkim if (ai != NULL) 193280304Sjkim M_ASN1_INTEGER_free(ai); 194280304Sjkim return (ret); 195280304Sjkim} 196