1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@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@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@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@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/asn1t.h> 62#include <openssl/bn.h> 63#include <openssl/err.h> 64#include <openssl/mem.h> 65 66 67/* Custom primitive type for long handling. This converts between an ASN1_INTEGER 68 * and a long directly. 69 */ 70 71 72static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 73static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 74 75static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it); 76static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it); 77static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx); 78 79static const ASN1_PRIMITIVE_FUNCS long_pf = { 80 NULL, 0, 81 long_new, 82 long_free, 83 long_free, /* Clear should set to initial value */ 84 long_c2i, 85 long_i2c, 86 long_print 87}; 88 89ASN1_ITEM_start(LONG) 90 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG" 91ASN1_ITEM_end(LONG) 92 93ASN1_ITEM_start(ZLONG) 94 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG" 95ASN1_ITEM_end(ZLONG) 96 97static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 98{ 99 *(long *)pval = it->size; 100 return 1; 101} 102 103static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it) 104{ 105 *(long *)pval = it->size; 106} 107 108static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it) 109{ 110 long ltmp; 111 unsigned long utmp; 112 int clen, pad, i; 113 /* this exists to bypass broken gcc optimization */ 114 char *cp = (char *)pval; 115 116 /* use memcpy, because we may not be long aligned */ 117 memcpy(<mp, cp, sizeof(long)); 118 119 if(ltmp == it->size) return -1; 120 /* Convert the long to positive: we subtract one if negative so 121 * we can cleanly handle the padding if only the MSB of the leading 122 * octet is set. 123 */ 124 if(ltmp < 0) utmp = -ltmp - 1; 125 else utmp = ltmp; 126 clen = BN_num_bits_word(utmp); 127 /* If MSB of leading octet set we need to pad */ 128 if(!(clen & 0x7)) pad = 1; 129 else pad = 0; 130 131 /* Convert number of bits to number of octets */ 132 clen = (clen + 7) >> 3; 133 134 if(cont) { 135 if(pad) *cont++ = (ltmp < 0) ? 0xff : 0; 136 for(i = clen - 1; i >= 0; i--) { 137 cont[i] = (unsigned char)(utmp & 0xff); 138 if(ltmp < 0) cont[i] ^= 0xff; 139 utmp >>= 8; 140 } 141 } 142 return clen + pad; 143} 144 145static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, 146 int utype, char *free_cont, const ASN1_ITEM *it) 147{ 148 int neg, i; 149 long ltmp; 150 unsigned long utmp = 0; 151 char *cp = (char *)pval; 152 if(len > (int)sizeof(long)) { 153 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); 154 return 0; 155 } 156 /* Is it negative? */ 157 if(len && (cont[0] & 0x80)) neg = 1; 158 else neg = 0; 159 utmp = 0; 160 for(i = 0; i < len; i++) { 161 utmp <<= 8; 162 if(neg) utmp |= cont[i] ^ 0xff; 163 else utmp |= cont[i]; 164 } 165 ltmp = (long)utmp; 166 if(neg) { 167 ltmp++; 168 ltmp = -ltmp; 169 } 170 if(ltmp == it->size) { 171 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); 172 return 0; 173 } 174 memcpy(cp, <mp, sizeof(long)); 175 return 1; 176} 177 178static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, 179 int indent, const ASN1_PCTX *pctx) 180 { 181 return BIO_printf(out, "%ld\n", *(long *)pval); 182 } 183