bss_mem.c revision 59191
155714Skris/* crypto/bio/bss_mem.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. 855714Skris * 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). 1555714Skris * 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. 2255714Skris * 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 :-). 3755714Skris * 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)" 4055714Skris * 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. 5255714Skris * 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 <errno.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/bio.h> 6355714Skris 6455714Skrisstatic int mem_write(BIO *h,char *buf,int num); 6555714Skrisstatic int mem_read(BIO *h,char *buf,int size); 6655714Skrisstatic int mem_puts(BIO *h,char *str); 6755714Skrisstatic int mem_gets(BIO *h,char *str,int size); 6855714Skrisstatic long mem_ctrl(BIO *h,int cmd,long arg1,char *arg2); 6955714Skrisstatic int mem_new(BIO *h); 7055714Skrisstatic int mem_free(BIO *data); 7155714Skrisstatic BIO_METHOD mem_method= 7255714Skris { 7355714Skris BIO_TYPE_MEM, 7455714Skris "memory buffer", 7555714Skris mem_write, 7655714Skris mem_read, 7755714Skris mem_puts, 7855714Skris mem_gets, 7955714Skris mem_ctrl, 8055714Skris mem_new, 8155714Skris mem_free, 8259191Skris NULL, 8355714Skris }; 8455714Skris 8555714Skris/* bio->num is used to hold the value to return on 'empty', if it is 8655714Skris * 0, should_retry is not set */ 8755714Skris 8855714SkrisBIO_METHOD *BIO_s_mem(void) 8955714Skris { 9055714Skris return(&mem_method); 9155714Skris } 9255714Skris 9359191SkrisBIO *BIO_new_mem_buf(void *buf, int len) 9459191Skris{ 9559191Skris BIO *ret; 9659191Skris BUF_MEM *b; 9759191Skris if (!buf) { 9859191Skris BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER); 9959191Skris return NULL; 10059191Skris } 10159191Skris if(len == -1) len = strlen(buf); 10259191Skris if(!(ret = BIO_new(BIO_s_mem())) ) return NULL; 10359191Skris b = (BUF_MEM *)ret->ptr; 10459191Skris b->data = buf; 10559191Skris b->length = len; 10659191Skris b->max = len; 10759191Skris ret->flags |= BIO_FLAGS_MEM_RDONLY; 10859191Skris /* Since this is static data retrying wont help */ 10959191Skris ret->num = 0; 11059191Skris return ret; 11159191Skris} 11259191Skris 11355714Skrisstatic int mem_new(BIO *bi) 11455714Skris { 11555714Skris BUF_MEM *b; 11655714Skris 11755714Skris if ((b=BUF_MEM_new()) == NULL) 11855714Skris return(0); 11955714Skris bi->shutdown=1; 12055714Skris bi->init=1; 12155714Skris bi->num= -1; 12255714Skris bi->ptr=(char *)b; 12355714Skris return(1); 12455714Skris } 12555714Skris 12655714Skrisstatic int mem_free(BIO *a) 12755714Skris { 12855714Skris if (a == NULL) return(0); 12955714Skris if (a->shutdown) 13055714Skris { 13155714Skris if ((a->init) && (a->ptr != NULL)) 13255714Skris { 13359191Skris BUF_MEM *b; 13459191Skris b = (BUF_MEM *)a->ptr; 13559191Skris if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL; 13659191Skris BUF_MEM_free(b); 13755714Skris a->ptr=NULL; 13855714Skris } 13955714Skris } 14055714Skris return(1); 14155714Skris } 14255714Skris 14355714Skrisstatic int mem_read(BIO *b, char *out, int outl) 14455714Skris { 14555714Skris int ret= -1; 14655714Skris BUF_MEM *bm; 14755714Skris int i; 14855714Skris char *from,*to; 14955714Skris 15055714Skris bm=(BUF_MEM *)b->ptr; 15155714Skris BIO_clear_retry_flags(b); 15255714Skris ret=(outl > bm->length)?bm->length:outl; 15359191Skris if ((out != NULL) && (ret > 0)) { 15455714Skris memcpy(out,bm->data,ret); 15555714Skris bm->length-=ret; 15655714Skris /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */ 15759191Skris if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret; 15859191Skris else { 15959191Skris from=(char *)&(bm->data[ret]); 16059191Skris to=(char *)&(bm->data[0]); 16159191Skris for (i=0; i<bm->length; i++) 16259191Skris to[i]=from[i]; 16355714Skris } 16459191Skris } else if (bm->length == 0) 16555714Skris { 16655714Skris if (b->num != 0) 16755714Skris BIO_set_retry_read(b); 16855714Skris ret= b->num; 16955714Skris } 17055714Skris return(ret); 17155714Skris } 17255714Skris 17355714Skrisstatic int mem_write(BIO *b, char *in, int inl) 17455714Skris { 17555714Skris int ret= -1; 17655714Skris int blen; 17755714Skris BUF_MEM *bm; 17855714Skris 17955714Skris bm=(BUF_MEM *)b->ptr; 18055714Skris if (in == NULL) 18155714Skris { 18255714Skris BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER); 18355714Skris goto end; 18455714Skris } 18555714Skris 18659191Skris if(b->flags & BIO_FLAGS_MEM_RDONLY) { 18759191Skris BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO); 18859191Skris goto end; 18959191Skris } 19059191Skris 19155714Skris BIO_clear_retry_flags(b); 19255714Skris blen=bm->length; 19355714Skris if (BUF_MEM_grow(bm,blen+inl) != (blen+inl)) 19455714Skris goto end; 19555714Skris memcpy(&(bm->data[blen]),in,inl); 19655714Skris ret=inl; 19755714Skrisend: 19855714Skris return(ret); 19955714Skris } 20055714Skris 20155714Skrisstatic long mem_ctrl(BIO *b, int cmd, long num, char *ptr) 20255714Skris { 20355714Skris long ret=1; 20455714Skris char **pptr; 20555714Skris 20655714Skris BUF_MEM *bm=(BUF_MEM *)b->ptr; 20755714Skris 20855714Skris switch (cmd) 20955714Skris { 21055714Skris case BIO_CTRL_RESET: 21159191Skris if (bm->data != NULL) { 21259191Skris /* For read only case reset to the start again */ 21359191Skris if(b->flags & BIO_FLAGS_MEM_RDONLY) 21459191Skris bm->data -= bm->max - bm->length; 21559191Skris else { 21659191Skris memset(bm->data,0,bm->max); 21759191Skris bm->length=0; 21859191Skris } 21959191Skris } 22055714Skris break; 22155714Skris case BIO_CTRL_EOF: 22255714Skris ret=(long)(bm->length == 0); 22355714Skris break; 22455714Skris case BIO_C_SET_BUF_MEM_EOF_RETURN: 22555714Skris b->num=(int)num; 22655714Skris break; 22755714Skris case BIO_CTRL_INFO: 22855714Skris ret=(long)bm->length; 22955714Skris if (ptr != NULL) 23055714Skris { 23155714Skris pptr=(char **)ptr; 23255714Skris *pptr=(char *)&(bm->data[0]); 23355714Skris } 23455714Skris break; 23555714Skris case BIO_C_SET_BUF_MEM: 23655714Skris mem_free(b); 23755714Skris b->shutdown=(int)num; 23855714Skris b->ptr=ptr; 23955714Skris break; 24055714Skris case BIO_C_GET_BUF_MEM_PTR: 24155714Skris if (ptr != NULL) 24255714Skris { 24355714Skris pptr=(char **)ptr; 24455714Skris *pptr=(char *)bm; 24555714Skris } 24655714Skris break; 24755714Skris case BIO_CTRL_GET_CLOSE: 24855714Skris ret=(long)b->shutdown; 24955714Skris break; 25055714Skris case BIO_CTRL_SET_CLOSE: 25155714Skris b->shutdown=(int)num; 25255714Skris break; 25355714Skris 25455714Skris case BIO_CTRL_WPENDING: 25555714Skris ret=0L; 25655714Skris break; 25755714Skris case BIO_CTRL_PENDING: 25855714Skris ret=(long)bm->length; 25955714Skris break; 26055714Skris case BIO_CTRL_DUP: 26155714Skris case BIO_CTRL_FLUSH: 26255714Skris ret=1; 26355714Skris break; 26455714Skris case BIO_CTRL_PUSH: 26555714Skris case BIO_CTRL_POP: 26655714Skris default: 26755714Skris ret=0; 26855714Skris break; 26955714Skris } 27055714Skris return(ret); 27155714Skris } 27255714Skris 27355714Skrisstatic int mem_gets(BIO *bp, char *buf, int size) 27455714Skris { 27555714Skris int i,j; 27655714Skris int ret= -1; 27755714Skris char *p; 27855714Skris BUF_MEM *bm=(BUF_MEM *)bp->ptr; 27955714Skris 28055714Skris BIO_clear_retry_flags(bp); 28155714Skris j=bm->length; 28255714Skris if (j <= 0) return(0); 28355714Skris p=bm->data; 28455714Skris for (i=0; i<j; i++) 28555714Skris { 28655714Skris if (p[i] == '\n') break; 28755714Skris } 28855714Skris if (i == j) 28955714Skris { 29055714Skris BIO_set_retry_read(bp); 29155714Skris /* return(-1); change the semantics 0.6.6a */ 29255714Skris } 29355714Skris else 29455714Skris i++; 29555714Skris /* i is the max to copy */ 29655714Skris if ((size-1) < i) i=size-1; 29755714Skris i=mem_read(bp,buf,i); 29855714Skris if (i > 0) buf[i]='\0'; 29955714Skris ret=i; 30055714Skris return(ret); 30155714Skris } 30255714Skris 30355714Skrisstatic int mem_puts(BIO *bp, char *str) 30455714Skris { 30555714Skris int n,ret; 30655714Skris 30755714Skris n=strlen(str); 30855714Skris ret=mem_write(bp,str,n); 30955714Skris /* memory semantics is that it will always work */ 31055714Skris return(ret); 31155714Skris } 31255714Skris 313