1*0Sstevel@tonic-gate /* crypto/asn1/a_bitstr.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #include <stdio.h> 60*0Sstevel@tonic-gate #include "cryptlib.h" 61*0Sstevel@tonic-gate #include <openssl/asn1.h> 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, unsigned char *d, int len) 64*0Sstevel@tonic-gate { return M_ASN1_BIT_STRING_set(x, d, len); } 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp) 67*0Sstevel@tonic-gate { 68*0Sstevel@tonic-gate int ret,j,bits,len; 69*0Sstevel@tonic-gate unsigned char *p,*d; 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate if (a == NULL) return(0); 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate len=a->length; 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate if (len > 0) 76*0Sstevel@tonic-gate { 77*0Sstevel@tonic-gate if (a->flags & ASN1_STRING_FLAG_BITS_LEFT) 78*0Sstevel@tonic-gate { 79*0Sstevel@tonic-gate bits=(int)a->flags&0x07; 80*0Sstevel@tonic-gate } 81*0Sstevel@tonic-gate else 82*0Sstevel@tonic-gate { 83*0Sstevel@tonic-gate for ( ; len > 0; len--) 84*0Sstevel@tonic-gate { 85*0Sstevel@tonic-gate if (a->data[len-1]) break; 86*0Sstevel@tonic-gate } 87*0Sstevel@tonic-gate j=a->data[len-1]; 88*0Sstevel@tonic-gate if (j & 0x01) bits=0; 89*0Sstevel@tonic-gate else if (j & 0x02) bits=1; 90*0Sstevel@tonic-gate else if (j & 0x04) bits=2; 91*0Sstevel@tonic-gate else if (j & 0x08) bits=3; 92*0Sstevel@tonic-gate else if (j & 0x10) bits=4; 93*0Sstevel@tonic-gate else if (j & 0x20) bits=5; 94*0Sstevel@tonic-gate else if (j & 0x40) bits=6; 95*0Sstevel@tonic-gate else if (j & 0x80) bits=7; 96*0Sstevel@tonic-gate else bits=0; /* should not happen */ 97*0Sstevel@tonic-gate } 98*0Sstevel@tonic-gate } 99*0Sstevel@tonic-gate else 100*0Sstevel@tonic-gate bits=0; 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate ret=1+len; 103*0Sstevel@tonic-gate if (pp == NULL) return(ret); 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate p= *pp; 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate *(p++)=(unsigned char)bits; 108*0Sstevel@tonic-gate d=a->data; 109*0Sstevel@tonic-gate memcpy(p,d,len); 110*0Sstevel@tonic-gate p+=len; 111*0Sstevel@tonic-gate if (len > 0) p[-1]&=(0xff<<bits); 112*0Sstevel@tonic-gate *pp=p; 113*0Sstevel@tonic-gate return(ret); 114*0Sstevel@tonic-gate } 115*0Sstevel@tonic-gate 116*0Sstevel@tonic-gate ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, unsigned char **pp, 117*0Sstevel@tonic-gate long len) 118*0Sstevel@tonic-gate { 119*0Sstevel@tonic-gate ASN1_BIT_STRING *ret=NULL; 120*0Sstevel@tonic-gate unsigned char *p,*s; 121*0Sstevel@tonic-gate int i; 122*0Sstevel@tonic-gate 123*0Sstevel@tonic-gate if (len < 1) 124*0Sstevel@tonic-gate { 125*0Sstevel@tonic-gate i=ASN1_R_STRING_TOO_SHORT; 126*0Sstevel@tonic-gate goto err; 127*0Sstevel@tonic-gate } 128*0Sstevel@tonic-gate 129*0Sstevel@tonic-gate if ((a == NULL) || ((*a) == NULL)) 130*0Sstevel@tonic-gate { 131*0Sstevel@tonic-gate if ((ret=M_ASN1_BIT_STRING_new()) == NULL) return(NULL); 132*0Sstevel@tonic-gate } 133*0Sstevel@tonic-gate else 134*0Sstevel@tonic-gate ret=(*a); 135*0Sstevel@tonic-gate 136*0Sstevel@tonic-gate p= *pp; 137*0Sstevel@tonic-gate i= *(p++); 138*0Sstevel@tonic-gate /* We do this to preserve the settings. If we modify 139*0Sstevel@tonic-gate * the settings, via the _set_bit function, we will recalculate 140*0Sstevel@tonic-gate * on output */ 141*0Sstevel@tonic-gate ret->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear */ 142*0Sstevel@tonic-gate ret->flags|=(ASN1_STRING_FLAG_BITS_LEFT|(i&0x07)); /* set */ 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate if (len-- > 1) /* using one because of the bits left byte */ 145*0Sstevel@tonic-gate { 146*0Sstevel@tonic-gate s=(unsigned char *)OPENSSL_malloc((int)len); 147*0Sstevel@tonic-gate if (s == NULL) 148*0Sstevel@tonic-gate { 149*0Sstevel@tonic-gate i=ERR_R_MALLOC_FAILURE; 150*0Sstevel@tonic-gate goto err; 151*0Sstevel@tonic-gate } 152*0Sstevel@tonic-gate memcpy(s,p,(int)len); 153*0Sstevel@tonic-gate s[len-1]&=(0xff<<i); 154*0Sstevel@tonic-gate p+=len; 155*0Sstevel@tonic-gate } 156*0Sstevel@tonic-gate else 157*0Sstevel@tonic-gate s=NULL; 158*0Sstevel@tonic-gate 159*0Sstevel@tonic-gate ret->length=(int)len; 160*0Sstevel@tonic-gate if (ret->data != NULL) OPENSSL_free(ret->data); 161*0Sstevel@tonic-gate ret->data=s; 162*0Sstevel@tonic-gate ret->type=V_ASN1_BIT_STRING; 163*0Sstevel@tonic-gate if (a != NULL) (*a)=ret; 164*0Sstevel@tonic-gate *pp=p; 165*0Sstevel@tonic-gate return(ret); 166*0Sstevel@tonic-gate err: 167*0Sstevel@tonic-gate ASN1err(ASN1_F_D2I_ASN1_BIT_STRING,i); 168*0Sstevel@tonic-gate if ((ret != NULL) && ((a == NULL) || (*a != ret))) 169*0Sstevel@tonic-gate M_ASN1_BIT_STRING_free(ret); 170*0Sstevel@tonic-gate return(NULL); 171*0Sstevel@tonic-gate } 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate /* These next 2 functions from Goetz Babin-Ebell <babinebell@trustcenter.de> 174*0Sstevel@tonic-gate */ 175*0Sstevel@tonic-gate int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value) 176*0Sstevel@tonic-gate { 177*0Sstevel@tonic-gate int w,v,iv; 178*0Sstevel@tonic-gate unsigned char *c; 179*0Sstevel@tonic-gate 180*0Sstevel@tonic-gate w=n/8; 181*0Sstevel@tonic-gate v=1<<(7-(n&0x07)); 182*0Sstevel@tonic-gate iv= ~v; 183*0Sstevel@tonic-gate if (!value) v=0; 184*0Sstevel@tonic-gate 185*0Sstevel@tonic-gate a->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear, set on write */ 186*0Sstevel@tonic-gate 187*0Sstevel@tonic-gate if (a == NULL) return(0); 188*0Sstevel@tonic-gate if ((a->length < (w+1)) || (a->data == NULL)) 189*0Sstevel@tonic-gate { 190*0Sstevel@tonic-gate if (!value) return(1); /* Don't need to set */ 191*0Sstevel@tonic-gate if (a->data == NULL) 192*0Sstevel@tonic-gate c=(unsigned char *)OPENSSL_malloc(w+1); 193*0Sstevel@tonic-gate else 194*0Sstevel@tonic-gate c=(unsigned char *)OPENSSL_realloc_clean(a->data, 195*0Sstevel@tonic-gate a->length, 196*0Sstevel@tonic-gate w+1); 197*0Sstevel@tonic-gate if (c == NULL) return(0); 198*0Sstevel@tonic-gate if (w+1-a->length > 0) memset(c+a->length, 0, w+1-a->length); 199*0Sstevel@tonic-gate a->data=c; 200*0Sstevel@tonic-gate a->length=w+1; 201*0Sstevel@tonic-gate } 202*0Sstevel@tonic-gate a->data[w]=((a->data[w])&iv)|v; 203*0Sstevel@tonic-gate while ((a->length > 0) && (a->data[a->length-1] == 0)) 204*0Sstevel@tonic-gate a->length--; 205*0Sstevel@tonic-gate return(1); 206*0Sstevel@tonic-gate } 207*0Sstevel@tonic-gate 208*0Sstevel@tonic-gate int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n) 209*0Sstevel@tonic-gate { 210*0Sstevel@tonic-gate int w,v; 211*0Sstevel@tonic-gate 212*0Sstevel@tonic-gate w=n/8; 213*0Sstevel@tonic-gate v=1<<(7-(n&0x07)); 214*0Sstevel@tonic-gate if ((a == NULL) || (a->length < (w+1)) || (a->data == NULL)) 215*0Sstevel@tonic-gate return(0); 216*0Sstevel@tonic-gate return((a->data[w]&v) != 0); 217*0Sstevel@tonic-gate } 218*0Sstevel@tonic-gate 219