diff options
author | Ralf S. Engelschall <rse@openssl.org> | 1998-12-21 10:52:47 +0000 |
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committer | Ralf S. Engelschall <rse@openssl.org> | 1998-12-21 10:52:47 +0000 |
commit | d02b48c63a58ea4367a0e905979f140b7d090f86 (patch) | |
tree | 504f62ed3d84799f785b9cd9fab255a21b0e1b0e /crypto/bio/bf_buff.c |
Import of old SSLeay release: SSLeay 0.8.1b
Diffstat (limited to 'crypto/bio/bf_buff.c')
-rw-r--r-- | crypto/bio/bf_buff.c | 489 |
1 files changed, 489 insertions, 0 deletions
diff --git a/crypto/bio/bf_buff.c b/crypto/bio/bf_buff.c new file mode 100644 index 0000000000..ac3ba14fe0 --- /dev/null +++ b/crypto/bio/bf_buff.c @@ -0,0 +1,489 @@ +/* crypto/bio/bf_buff.c */ +/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <errno.h> +#include "cryptlib.h" +#include "bio.h" +#include "evp.h" + +#ifndef NOPROTO +static int buffer_write(BIO *h,char *buf,int num); +static int buffer_read(BIO *h,char *buf,int size); +static int buffer_puts(BIO *h,char *str); +static int buffer_gets(BIO *h,char *str,int size); +static long buffer_ctrl(BIO *h,int cmd,long arg1,char *arg2); +static int buffer_new(BIO *h); +static int buffer_free(BIO *data); +#else +static int buffer_write(); +static int buffer_read(); +static int buffer_puts(); +static int buffer_gets(); +static long buffer_ctrl(); +static int buffer_new(); +static int buffer_free(); +#endif + +#define DEFAULT_BUFFER_SIZE 1024 + +static BIO_METHOD methods_buffer= + { + BIO_TYPE_BUFFER,"buffer", + buffer_write, + buffer_read, + buffer_puts, + buffer_gets, + buffer_ctrl, + buffer_new, + buffer_free, + }; + +BIO_METHOD *BIO_f_buffer() + { + return(&methods_buffer); + } + +static int buffer_new(bi) +BIO *bi; + { + BIO_F_BUFFER_CTX *ctx; + + ctx=(BIO_F_BUFFER_CTX *)Malloc(sizeof(BIO_F_BUFFER_CTX)); + if (ctx == NULL) return(0); + ctx->ibuf=(char *)Malloc(DEFAULT_BUFFER_SIZE); + if (ctx->ibuf == NULL) { Free(ctx); return(0); } + ctx->obuf=(char *)Malloc(DEFAULT_BUFFER_SIZE); + if (ctx->obuf == NULL) { Free(ctx->ibuf); Free(ctx); return(0); } + ctx->ibuf_size=DEFAULT_BUFFER_SIZE; + ctx->obuf_size=DEFAULT_BUFFER_SIZE; + ctx->ibuf_len=0; + ctx->ibuf_off=0; + ctx->obuf_len=0; + ctx->obuf_off=0; + + bi->init=1; + bi->ptr=(char *)ctx; + bi->flags=0; + return(1); + } + +static int buffer_free(a) +BIO *a; + { + BIO_F_BUFFER_CTX *b; + + if (a == NULL) return(0); + b=(BIO_F_BUFFER_CTX *)a->ptr; + if (b->ibuf != NULL) Free(b->ibuf); + if (b->obuf != NULL) Free(b->obuf); + Free(a->ptr); + a->ptr=NULL; + a->init=0; + a->flags=0; + return(1); + } + +static int buffer_read(b,out,outl) +BIO *b; +char *out; +int outl; + { + int i,num=0; + BIO_F_BUFFER_CTX *ctx; + + if (out == NULL) return(0); + ctx=(BIO_F_BUFFER_CTX *)b->ptr; + + if ((ctx == NULL) || (b->next_bio == NULL)) return(0); + num=0; + BIO_clear_retry_flags(b); + +start: + i=ctx->ibuf_len; + /* If there is stuff left over, grab it */ + if (i != 0) + { + if (i > outl) i=outl; + memcpy(out,&(ctx->ibuf[ctx->ibuf_off]),i); + ctx->ibuf_off+=i; + ctx->ibuf_len-=i; + num+=i; + if (outl == i) return(num); + outl-=i; + out+=i; + } + + /* We may have done a partial read. try to do more. + * We have nothing in the buffer. + * If we get an error and have read some data, just return it + * and let them retry to get the error again. + * copy direct to parent address space */ + if (outl > ctx->ibuf_size) + { + for (;;) + { + i=BIO_read(b->next_bio,out,outl); + if (i <= 0) + { + BIO_copy_next_retry(b); + if (i < 0) return((num > 0)?num:i); + if (i == 0) return(num); + } + num+=i; + if (outl == i) return(num); + out+=i; + outl-=i; + } + } + /* else */ + + /* we are going to be doing some buffering */ + i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size); + if (i <= 0) + { + BIO_copy_next_retry(b); + if (i < 0) return((num > 0)?num:i); + if (i == 0) return(num); + } + ctx->ibuf_off=0; + ctx->ibuf_len=i; + + /* Lets re-read using ourselves :-) */ + goto start; + } + +static int buffer_write(b,in,inl) +BIO *b; +char *in; +int inl; + { + int i,num=0; + BIO_F_BUFFER_CTX *ctx; + + if ((in == NULL) || (inl <= 0)) return(0); + ctx=(BIO_F_BUFFER_CTX *)b->ptr; + if ((ctx == NULL) || (b->next_bio == NULL)) return(0); + + BIO_clear_retry_flags(b); +start: + i=ctx->obuf_size-(ctx->obuf_len+ctx->obuf_off); + /* add to buffer and return */ + if (i >= inl) + { + memcpy(&(ctx->obuf[ctx->obuf_len]),in,inl); + ctx->obuf_len+=inl; + return(num+inl); + } + /* else */ + /* stuff already in buffer, so add to it first, then flush */ + if (ctx->obuf_len != 0) + { + if (i > 0) /* lets fill it up if we can */ + { + memcpy(&(ctx->obuf[ctx->obuf_len]),in,i); + in+=i; + inl-=i; + num+=i; + ctx->obuf_len+=i; + } + /* we now have a full buffer needing flushing */ + for (;;) + { + i=BIO_write(b->next_bio,&(ctx->obuf[ctx->obuf_off]), + ctx->obuf_len); + if (i <= 0) + { + BIO_copy_next_retry(b); + + if (i < 0) return((num > 0)?num:i); + if (i == 0) return(num); + } + ctx->obuf_off+=i; + ctx->obuf_len-=i; + if (ctx->obuf_len == 0) break; + } + } + /* we only get here if the buffer has been flushed and we + * still have stuff to write */ + ctx->obuf_off=0; + + /* we now have inl bytes to write */ + while (inl >= ctx->obuf_size) + { + i=BIO_write(b->next_bio,in,inl); + if (i <= 0) + { + BIO_copy_next_retry(b); + if (i < 0) return((num > 0)?num:i); + if (i == 0) return(num); + } + num+=i; + in+=i; + inl-=i; + if (inl == 0) return(num); + } + + /* copy the rest into the buffer since we have only a small + * amount left */ + goto start; + } + +static long buffer_ctrl(b,cmd,num,ptr) +BIO *b; +int cmd; +long num; +char *ptr; + { + BIO *dbio; + BIO_F_BUFFER_CTX *ctx; + long ret=1; + char *p1,*p2; + int r,i,*ip; + int ibs,obs; + + ctx=(BIO_F_BUFFER_CTX *)b->ptr; + + switch (cmd) + { + case BIO_CTRL_RESET: + ctx->ibuf_off=0; + ctx->ibuf_len=0; + ctx->obuf_off=0; + ctx->obuf_len=0; + ret=BIO_ctrl(b->next_bio,cmd,num,ptr); + break; + case BIO_CTRL_INFO: + ret=(long)ctx->obuf_len; + break; + case BIO_C_GET_BUFF_NUM_LINES: + ret=0; + p1=ctx->ibuf; + for (i=ctx->ibuf_off; i<ctx->ibuf_len; i++) + { + if (p1[i] == '\n') ret++; + } + break; + case BIO_CTRL_WPENDING: + ret=(long)ctx->obuf_len; + if (ret == 0) + ret=BIO_ctrl(b->next_bio,cmd,num,ptr); + break; + case BIO_CTRL_PENDING: + ret=(long)ctx->ibuf_len; + if (ret == 0) + ret=BIO_ctrl(b->next_bio,cmd,num,ptr); + break; + case BIO_C_SET_BUFF_SIZE: + if (ptr != NULL) + { + ip=(int *)ptr; + if (*ip == 0) + { + ibs=(int)num; + obs=ctx->obuf_size; + } + else /* if (*ip == 1) */ + { + ibs=ctx->ibuf_size; + obs=(int)num; + } + } + else + { + ibs=(int)num; + obs=(int)num; + } + p1=ctx->ibuf; + p2=ctx->obuf; + if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) + { + p1=(char *)Malloc((int)num); + if (p1 == NULL) { ret=0; break; } + } + if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) + { + p2=(char *)Malloc((int)num); + if (p2 == NULL) + { + ret=0; + if (p1 != ctx->ibuf) Free(p1); + break; + } + } + if (ctx->ibuf != p1) + { + Free(ctx->ibuf); + ctx->ibuf=p1; + ctx->ibuf_off=0; + ctx->ibuf_len=0; + ctx->ibuf_size=ibs; + } + if (ctx->obuf != p2) + { + Free(ctx->obuf); + ctx->obuf=p2; + ctx->obuf_off=0; + ctx->obuf_len=0; + ctx->obuf_size=obs; + } + break; + case BIO_C_DO_STATE_MACHINE: + BIO_clear_retry_flags(b); + ret=BIO_ctrl(b->next_bio,cmd,num,ptr); + BIO_copy_next_retry(b); + break; + + case BIO_CTRL_FLUSH: + if (ctx->obuf_len <= 0) + break; + + for (;;) + { + BIO_clear_retry_flags(b); + if (ctx->obuf_len > ctx->obuf_off) + { + r=BIO_write(b->next_bio, + &(ctx->obuf[ctx->obuf_off]), + ctx->obuf_len-ctx->obuf_off); +#if 0 +fprintf(stderr,"FLUSH [%3d] %3d -> %3d\n",ctx->obuf_off,ctx->obuf_len-ctx->obuf_off,r); +#endif + BIO_copy_next_retry(b); + if (r <= 0) return((long)r); + ctx->obuf_off+=r; + } + else + { + ctx->obuf_len=0; + ctx->obuf_off=0; + ret=1; + break; + } + } + break; + case BIO_CTRL_DUP: + dbio=(BIO *)ptr; + if ( !BIO_set_read_buffer_size(dbio,ctx->ibuf_size) || + !BIO_set_write_buffer_size(dbio,ctx->obuf_size)) + ret=0; + break; + default: + ret=BIO_ctrl(b->next_bio,cmd,num,ptr); + break; + } + return(ret); + } + +static int buffer_gets(b,buf,size) +BIO *b; +char *buf; +int size; + { + BIO_F_BUFFER_CTX *ctx; + int num=0,i; + char *p; + + ctx=(BIO_F_BUFFER_CTX *)b->ptr; + size--; + BIO_clear_retry_flags(b); + + for (;;) + { + if (ctx->ibuf_len != 0) + { + p= &(ctx->ibuf[ctx->ibuf_off]); + for (i=0; (i<ctx->ibuf_len) && (i<(size-1)); i++) + { + *(buf++)=p[i]; + if (p[i] == '\n') break; + } + num+=i; + size-=i; + ctx->ibuf_len-=i; + ctx->ibuf_off+=i; + if (p[i] == '\n') + { + buf[i+1]='\0'; + ctx->ibuf_len--; + ctx->ibuf_off++; + return(num); + } + } + else /* read another chunk */ + { + i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size); + if (i <= 0) + { + BIO_copy_next_retry(b); + if (i < 0) return((num > 0)?num:i); + if (i == 0) return(num); + } + ctx->ibuf_len=i; + ctx->ibuf_off=0; + } + } + } + +static int buffer_puts(b,str) +BIO *b; +char *str; + { + return(BIO_write(b,str,strlen(str))); + } + |