1*0Sstevel@tonic-gate /* crypto/buffer/buffer.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/buffer.h> 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate BUF_MEM *BUF_MEM_new(void) 64*0Sstevel@tonic-gate { 65*0Sstevel@tonic-gate BUF_MEM *ret; 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate ret=OPENSSL_malloc(sizeof(BUF_MEM)); 68*0Sstevel@tonic-gate if (ret == NULL) 69*0Sstevel@tonic-gate { 70*0Sstevel@tonic-gate BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE); 71*0Sstevel@tonic-gate return(NULL); 72*0Sstevel@tonic-gate } 73*0Sstevel@tonic-gate ret->length=0; 74*0Sstevel@tonic-gate ret->max=0; 75*0Sstevel@tonic-gate ret->data=NULL; 76*0Sstevel@tonic-gate return(ret); 77*0Sstevel@tonic-gate } 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate void BUF_MEM_free(BUF_MEM *a) 80*0Sstevel@tonic-gate { 81*0Sstevel@tonic-gate if(a == NULL) 82*0Sstevel@tonic-gate return; 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate if (a->data != NULL) 85*0Sstevel@tonic-gate { 86*0Sstevel@tonic-gate memset(a->data,0,(unsigned int)a->max); 87*0Sstevel@tonic-gate OPENSSL_free(a->data); 88*0Sstevel@tonic-gate } 89*0Sstevel@tonic-gate OPENSSL_free(a); 90*0Sstevel@tonic-gate } 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate int BUF_MEM_grow(BUF_MEM *str, int len) 93*0Sstevel@tonic-gate { 94*0Sstevel@tonic-gate char *ret; 95*0Sstevel@tonic-gate unsigned int n; 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate if (str->length >= len) 98*0Sstevel@tonic-gate { 99*0Sstevel@tonic-gate str->length=len; 100*0Sstevel@tonic-gate return(len); 101*0Sstevel@tonic-gate } 102*0Sstevel@tonic-gate if (str->max >= len) 103*0Sstevel@tonic-gate { 104*0Sstevel@tonic-gate memset(&str->data[str->length],0,len-str->length); 105*0Sstevel@tonic-gate str->length=len; 106*0Sstevel@tonic-gate return(len); 107*0Sstevel@tonic-gate } 108*0Sstevel@tonic-gate n=(len+3)/3*4; 109*0Sstevel@tonic-gate if (str->data == NULL) 110*0Sstevel@tonic-gate ret=OPENSSL_malloc(n); 111*0Sstevel@tonic-gate else 112*0Sstevel@tonic-gate ret=OPENSSL_realloc(str->data,n); 113*0Sstevel@tonic-gate if (ret == NULL) 114*0Sstevel@tonic-gate { 115*0Sstevel@tonic-gate BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); 116*0Sstevel@tonic-gate len=0; 117*0Sstevel@tonic-gate } 118*0Sstevel@tonic-gate else 119*0Sstevel@tonic-gate { 120*0Sstevel@tonic-gate str->data=ret; 121*0Sstevel@tonic-gate str->max=n; 122*0Sstevel@tonic-gate memset(&str->data[str->length],0,len-str->length); 123*0Sstevel@tonic-gate str->length=len; 124*0Sstevel@tonic-gate } 125*0Sstevel@tonic-gate return(len); 126*0Sstevel@tonic-gate } 127*0Sstevel@tonic-gate 128*0Sstevel@tonic-gate int BUF_MEM_grow_clean(BUF_MEM *str, int len) 129*0Sstevel@tonic-gate { 130*0Sstevel@tonic-gate char *ret; 131*0Sstevel@tonic-gate unsigned int n; 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gate if (str->length >= len) 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate memset(&str->data[len],0,str->length-len); 136*0Sstevel@tonic-gate str->length=len; 137*0Sstevel@tonic-gate return(len); 138*0Sstevel@tonic-gate } 139*0Sstevel@tonic-gate if (str->max >= len) 140*0Sstevel@tonic-gate { 141*0Sstevel@tonic-gate memset(&str->data[str->length],0,len-str->length); 142*0Sstevel@tonic-gate str->length=len; 143*0Sstevel@tonic-gate return(len); 144*0Sstevel@tonic-gate } 145*0Sstevel@tonic-gate n=(len+3)/3*4; 146*0Sstevel@tonic-gate if (str->data == NULL) 147*0Sstevel@tonic-gate ret=OPENSSL_malloc(n); 148*0Sstevel@tonic-gate else 149*0Sstevel@tonic-gate ret=OPENSSL_realloc_clean(str->data,str->max,n); 150*0Sstevel@tonic-gate if (ret == NULL) 151*0Sstevel@tonic-gate { 152*0Sstevel@tonic-gate BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); 153*0Sstevel@tonic-gate len=0; 154*0Sstevel@tonic-gate } 155*0Sstevel@tonic-gate else 156*0Sstevel@tonic-gate { 157*0Sstevel@tonic-gate str->data=ret; 158*0Sstevel@tonic-gate str->max=n; 159*0Sstevel@tonic-gate memset(&str->data[str->length],0,len-str->length); 160*0Sstevel@tonic-gate str->length=len; 161*0Sstevel@tonic-gate } 162*0Sstevel@tonic-gate return(len); 163*0Sstevel@tonic-gate } 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate char *BUF_strdup(const char *str) 166*0Sstevel@tonic-gate { 167*0Sstevel@tonic-gate char *ret; 168*0Sstevel@tonic-gate int n; 169*0Sstevel@tonic-gate 170*0Sstevel@tonic-gate if (str == NULL) return(NULL); 171*0Sstevel@tonic-gate 172*0Sstevel@tonic-gate n=strlen(str); 173*0Sstevel@tonic-gate ret=OPENSSL_malloc(n+1); 174*0Sstevel@tonic-gate if (ret == NULL) 175*0Sstevel@tonic-gate { 176*0Sstevel@tonic-gate BUFerr(BUF_F_BUF_STRDUP,ERR_R_MALLOC_FAILURE); 177*0Sstevel@tonic-gate return(NULL); 178*0Sstevel@tonic-gate } 179*0Sstevel@tonic-gate memcpy(ret,str,n+1); 180*0Sstevel@tonic-gate return(ret); 181*0Sstevel@tonic-gate } 182*0Sstevel@tonic-gate 183*0Sstevel@tonic-gate size_t BUF_strlcpy(char *dst, const char *src, size_t size) 184*0Sstevel@tonic-gate { 185*0Sstevel@tonic-gate size_t l = 0; 186*0Sstevel@tonic-gate for(; size > 1 && *src; size--) 187*0Sstevel@tonic-gate { 188*0Sstevel@tonic-gate *dst++ = *src++; 189*0Sstevel@tonic-gate l++; 190*0Sstevel@tonic-gate } 191*0Sstevel@tonic-gate if (size) 192*0Sstevel@tonic-gate *dst = '\0'; 193*0Sstevel@tonic-gate return l + strlen(src); 194*0Sstevel@tonic-gate } 195*0Sstevel@tonic-gate 196*0Sstevel@tonic-gate size_t BUF_strlcat(char *dst, const char *src, size_t size) 197*0Sstevel@tonic-gate { 198*0Sstevel@tonic-gate size_t l = 0; 199*0Sstevel@tonic-gate for(; size > 0 && *dst; size--, dst++) 200*0Sstevel@tonic-gate l++; 201*0Sstevel@tonic-gate return l + BUF_strlcpy(dst, src, size); 202*0Sstevel@tonic-gate } 203