--- /dev/null
+/* crypto/bio/bf_buff.c */
+/* Copyright (C) 1995-1998 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 <openssl/bio.h>
+
+static int buffer_write(BIO *h, const char *buf,int num);
+static int buffer_read(BIO *h, char *buf, int size);
+static int buffer_puts(BIO *h, const char *str);
+static int buffer_gets(BIO *h, char *str, int size);
+static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int buffer_new(BIO *h);
+static int buffer_free(BIO *data);
+static long buffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
+#define DEFAULT_BUFFER_SIZE 4096
+
+static BIO_METHOD methods_buffer=
+ {
+ BIO_TYPE_BUFFER,
+ "buffer",
+ buffer_write,
+ buffer_read,
+ buffer_puts,
+ buffer_gets,
+ buffer_ctrl,
+ buffer_new,
+ buffer_free,
+ buffer_callback_ctrl,
+ };
+
+BIO_METHOD *BIO_f_buffer(void)
+ {
+ return(&methods_buffer);
+ }
+
+static int buffer_new(BIO *bi)
+ {
+ BIO_F_BUFFER_CTX *ctx;
+
+ ctx=(BIO_F_BUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_F_BUFFER_CTX));
+ if (ctx == NULL) return(0);
+ ctx->ibuf=(char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
+ if (ctx->ibuf == NULL) { OPENSSL_free(ctx); return(0); }
+ ctx->obuf=(char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
+ if (ctx->obuf == NULL) { OPENSSL_free(ctx->ibuf); OPENSSL_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(BIO *a)
+ {
+ BIO_F_BUFFER_CTX *b;
+
+ if (a == NULL) return(0);
+ b=(BIO_F_BUFFER_CTX *)a->ptr;
+ if (b->ibuf != NULL) OPENSSL_free(b->ibuf);
+ if (b->obuf != NULL) OPENSSL_free(b->obuf);
+ OPENSSL_free(a->ptr);
+ a->ptr=NULL;
+ a->init=0;
+ a->flags=0;
+ return(1);
+ }
+
+static int buffer_read(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(BIO *b, const 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_off+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_off+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(BIO *b, int cmd, long num, void *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;
+ if (b->next_bio == NULL) return(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=0; i<ctx->ibuf_len; i++)
+ {
+ if (p1[ctx->ibuf_off + i] == '\n') ret++;
+ }
+ break;
+ case BIO_CTRL_WPENDING:
+ ret=(long)ctx->obuf_len;
+ if (ret == 0)
+ {
+ if (b->next_bio == NULL) return(0);
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ }
+ break;
+ case BIO_CTRL_PENDING:
+ ret=(long)ctx->ibuf_len;
+ if (ret == 0)
+ {
+ if (b->next_bio == NULL) return(0);
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ }
+ break;
+ case BIO_C_SET_BUFF_READ_DATA:
+ if (num > ctx->ibuf_size)
+ {
+ p1=OPENSSL_malloc((int)num);
+ if (p1 == NULL) goto malloc_error;
+ if (ctx->ibuf != NULL) OPENSSL_free(ctx->ibuf);
+ ctx->ibuf=p1;
+ }
+ ctx->ibuf_off=0;
+ ctx->ibuf_len=(int)num;
+ memcpy(ctx->ibuf,ptr,(int)num);
+ ret=1;
+ 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 *)OPENSSL_malloc((int)num);
+ if (p1 == NULL) goto malloc_error;
+ }
+ if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size))
+ {
+ p2=(char *)OPENSSL_malloc((int)num);
+ if (p2 == NULL)
+ {
+ if (p1 != ctx->ibuf) OPENSSL_free(p1);
+ goto malloc_error;
+ }
+ }
+ if (ctx->ibuf != p1)
+ {
+ OPENSSL_free(ctx->ibuf);
+ ctx->ibuf=p1;
+ ctx->ibuf_off=0;
+ ctx->ibuf_len=0;
+ ctx->ibuf_size=ibs;
+ }
+ if (ctx->obuf != p2)
+ {
+ OPENSSL_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:
+ if (b->next_bio == NULL) return(0);
+ 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 (b->next_bio == NULL) return(0);
+ if (ctx->obuf_len <= 0)
+ {
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ }
+
+ for (;;)
+ {
+ BIO_clear_retry_flags(b);
+ if (ctx->obuf_len > 0)
+ {
+ r=BIO_write(b->next_bio,
+ &(ctx->obuf[ctx->obuf_off]),
+ ctx->obuf_len);
+#if 0
+fprintf(stderr,"FLUSH [%3d] %3d -> %3d\n",ctx->obuf_off,ctx->obuf_len,r);
+#endif
+ BIO_copy_next_retry(b);
+ if (r <= 0) return((long)r);
+ ctx->obuf_off+=r;
+ ctx->obuf_len-=r;
+ }
+ else
+ {
+ ctx->obuf_len=0;
+ ctx->obuf_off=0;
+ ret=1;
+ break;
+ }
+ }
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ 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:
+ if (b->next_bio == NULL) return(0);
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ }
+ return(ret);
+malloc_error:
+ BIOerr(BIO_F_BUFFER_CTRL,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+
+static long buffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
+ {
+ long ret=1;
+
+ if (b->next_bio == NULL) return(0);
+ switch (cmd)
+ {
+ default:
+ ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
+ break;
+ }
+ return(ret);
+ }
+
+static int buffer_gets(BIO *b, char *buf, int size)
+ {
+ BIO_F_BUFFER_CTX *ctx;
+ int num=0,i,flag;
+ char *p;
+
+ ctx=(BIO_F_BUFFER_CTX *)b->ptr;
+ size--; /* reserve space for a '\0' */
+ BIO_clear_retry_flags(b);
+
+ for (;;)
+ {
+ if (ctx->ibuf_len > 0)
+ {
+ p= &(ctx->ibuf[ctx->ibuf_off]);
+ flag=0;
+ for (i=0; (i<ctx->ibuf_len) && (i<size); i++)
+ {
+ *(buf++)=p[i];
+ if (p[i] == '\n')
+ {
+ flag=1;
+ i++;
+ break;
+ }
+ }
+ num+=i;
+ size-=i;
+ ctx->ibuf_len-=i;
+ ctx->ibuf_off+=i;
+ if (flag || size == 0)
+ {
+ *buf='\0';
+ 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);
+ *buf='\0';
+ 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(BIO *b, const char *str)
+ {
+ return(buffer_write(b,str,strlen(str)));
+ }
+
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