1656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* x_long.c */ 2e45f106cb6b47af1f21efe76e933bdea2f5dd1caNagendra Modadugu/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * project 2000. 4656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 5656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* ==================================================================== 6656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Copyright (c) 2000 The OpenSSL Project. All rights reserved. 7656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 8656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Redistribution and use in source and binary forms, with or without 9656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * modification, are permitted provided that the following conditions 10656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * are met: 11656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 12656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 1. Redistributions of source code must retain the above copyright 13656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer. 14656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 15656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 16656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * notice, this list of conditions and the following disclaimer in 17656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * the documentation and/or other materials provided with the 18656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * distribution. 19656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 20656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 3. All advertising materials mentioning features or use of this 21656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * software must display the following acknowledgment: 22656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 23656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 25656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * endorse or promote products derived from this software without 27656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * prior written permission. For written permission, please contact 28656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * licensing@OpenSSL.org. 29656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 30656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 5. Products derived from this software may not be called "OpenSSL" 31656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * nor may "OpenSSL" appear in their names without prior written 32656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * permission of the OpenSSL Project. 33656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 34656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 6. Redistributions of any form whatsoever must retain the following 35656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * acknowledgment: 36656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * "This product includes software developed by the OpenSSL Project 37656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 39656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * OF THE POSSIBILITY OF SUCH DAMAGE. 51656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * ==================================================================== 52656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 53656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * This product includes cryptographic software written by Eric Young 54656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * (eay@cryptsoft.com). This product includes software written by Tim 55656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * Hudson (tjh@cryptsoft.com). 56656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * 57656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 58656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 59656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <stdio.h> 60656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include "cryptlib.h" 61656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/asn1t.h> 62656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project#include <openssl/bn.h> 63656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 64656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project/* Custom primitive type for long handling. This converts between an ASN1_INTEGER 65656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * and a long directly. 66656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 67656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 68656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 69656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 70656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 71656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 72656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it); 73656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it); 74221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromstatic int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx); 75656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 76656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic ASN1_PRIMITIVE_FUNCS long_pf = { 77656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project NULL, 0, 78656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long_new, 79656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long_free, 80656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long_free, /* Clear should set to initial value */ 81656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long_c2i, 82221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom long_i2c, 83221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom long_print 84656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project}; 85656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 86656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectASN1_ITEM_start(LONG) 87656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG" 88656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectASN1_ITEM_end(LONG) 89656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 90656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectASN1_ITEM_start(ZLONG) 91656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG" 92656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source ProjectASN1_ITEM_end(ZLONG) 93656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 94656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it) 95656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ 96656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *(long *)pval = it->size; 97656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 98656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 99656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 100656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it) 101656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ 102656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project *(long *)pval = it->size; 103656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 104656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 105656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it) 106656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ 107656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long ltmp; 108656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned long utmp; 109656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int clen, pad, i; 110656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* this exists to bypass broken gcc optimization */ 111656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project char *cp = (char *)pval; 112656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 113656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* use memcpy, because we may not be long aligned */ 114656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(<mp, cp, sizeof(long)); 115656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 116656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(ltmp == it->size) return -1; 117656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Convert the long to positive: we subtract one if negative so 118656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * we can cleanly handle the padding if only the MSB of the leading 119656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project * octet is set. 120656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project */ 121656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(ltmp < 0) utmp = -ltmp - 1; 122656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else utmp = ltmp; 123656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project clen = BN_num_bits_word(utmp); 124656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* If MSB of leading octet set we need to pad */ 125656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(!(clen & 0x7)) pad = 1; 126656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else pad = 0; 127656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 128656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Convert number of bits to number of octets */ 129656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project clen = (clen + 7) >> 3; 130656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 131656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(cont) { 132656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(pad) *cont++ = (ltmp < 0) ? 0xff : 0; 133656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for(i = clen - 1; i >= 0; i--) { 134656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project cont[i] = (unsigned char)(utmp & 0xff); 135656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(ltmp < 0) cont[i] ^= 0xff; 136656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project utmp >>= 8; 137656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 138656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 139656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return clen + pad; 140656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 141656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project 142656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Projectstatic int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, 143656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int utype, char *free_cont, const ASN1_ITEM *it) 144656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project{ 145656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project int neg, i; 146656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project long ltmp; 147656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project unsigned long utmp = 0; 148656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project char *cp = (char *)pval; 149656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(len > (int)sizeof(long)) { 150656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); 151656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 152656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 153656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project /* Is it negative? */ 154656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(len && (cont[0] & 0x80)) neg = 1; 155656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else neg = 0; 156656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project utmp = 0; 157656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project for(i = 0; i < len; i++) { 158656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project utmp <<= 8; 159656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(neg) utmp |= cont[i] ^ 0xff; 160656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project else utmp |= cont[i]; 161656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 162656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ltmp = (long)utmp; 163656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(neg) { 164656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ltmp++; 165656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ltmp = -ltmp; 166656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 167656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project if(ltmp == it->size) { 168656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG); 169656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 0; 170656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project } 171656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project memcpy(cp, <mp, sizeof(long)); 172656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project return 1; 173656d9c7f52f88b3a3daccafa7655dec086c4756eThe Android Open Source Project} 174221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom 175221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstromstatic int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, 176221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom int indent, const ASN1_PCTX *pctx) 177221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom { 178221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom return BIO_printf(out, "%ld\n", *(long *)pval); 179221304ee937bc0910948a8be1320cb8cc4eb6d36Brian Carlstrom } 180