+/* 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>
+#include <openssl/evp.h>
+
+static int linebuffer_write(BIO *h, const char *buf,int num);
+static int linebuffer_read(BIO *h, char *buf, int size);
+static int linebuffer_puts(BIO *h, const char *str);
+static int linebuffer_gets(BIO *h, char *str, int size);
+static long linebuffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int linebuffer_new(BIO *h);
+static int linebuffer_free(BIO *data);
+static long linebuffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
+
+/* A 10k maximum should be enough for most purposes */
+#define DEFAULT_LINEBUFFER_SIZE 1024*10
+
+/* #define DEBUG */
+
+static BIO_METHOD methods_linebuffer=
+ {
+ BIO_TYPE_LINEBUFFER,
+ "linebuffer",
+ linebuffer_write,
+ linebuffer_read,
+ linebuffer_puts,
+ linebuffer_gets,
+ linebuffer_ctrl,
+ linebuffer_new,
+ linebuffer_free,
+ linebuffer_callback_ctrl,
+ };
+
+BIO_METHOD *BIO_f_linebuffer(void)
+ {
+ return(&methods_linebuffer);
+ }
+
+typedef struct bio_linebuffer_ctx_struct
+ {
+ char *obuf; /* the output char array */
+ int obuf_size; /* how big is the output buffer */
+ int obuf_len; /* how many bytes are in it */
+ } BIO_LINEBUFFER_CTX;
+
+static int linebuffer_new(BIO *bi)
+ {
+ BIO_LINEBUFFER_CTX *ctx;
+
+ ctx=(BIO_LINEBUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_LINEBUFFER_CTX));
+ if (ctx == NULL) return(0);
+ ctx->obuf=(char *)OPENSSL_malloc(DEFAULT_LINEBUFFER_SIZE);
+ if (ctx->obuf == NULL) { OPENSSL_free(ctx); return(0); }
+ ctx->obuf_size=DEFAULT_LINEBUFFER_SIZE;
+ ctx->obuf_len=0;
+
+ bi->init=1;
+ bi->ptr=(char *)ctx;
+ bi->flags=0;
+ return(1);
+ }
+
+static int linebuffer_free(BIO *a)
+ {
+ BIO_LINEBUFFER_CTX *b;
+
+ if (a == NULL) return(0);
+ b=(BIO_LINEBUFFER_CTX *)a->ptr;
+ 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 linebuffer_read(BIO *b, char *out, int outl)
+ {
+ int ret=0;
+
+ if (out == NULL) return(0);
+ if (b->next_bio == NULL) return(0);
+ ret=BIO_read(b->next_bio,out,outl);
+ BIO_clear_retry_flags(b);
+ BIO_copy_next_retry(b);
+ return(ret);
+ }
+
+static int linebuffer_write(BIO *b, const char *in, int inl)
+ {
+ int i,num=0,foundnl;
+ BIO_LINEBUFFER_CTX *ctx;
+
+ if ((in == NULL) || (inl <= 0)) return(0);
+ ctx=(BIO_LINEBUFFER_CTX *)b->ptr;
+ if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
+
+ BIO_clear_retry_flags(b);
+
+ do
+ {
+ const char *p;
+
+ for(p = in; p < in + inl && *p != '\n'; p++)
+ ;
+ if (*p == '\n')
+ {
+ p++;
+ foundnl = 1;
+ }
+ else
+ foundnl = 0;
+
+ /* If a NL was found and we already have text in the save
+ buffer, concatenate them and write */
+ while ((foundnl || p - in > ctx->obuf_size - ctx->obuf_len)
+ && ctx->obuf_len > 0)
+ {
+ int orig_olen = ctx->obuf_len;
+
+ i = ctx->obuf_size - ctx->obuf_len;
+ if (p - in > 0)
+ {
+ if (i >= p - in)
+ {
+ memcpy(&(ctx->obuf[ctx->obuf_len]),
+ in,p - in);
+ ctx->obuf_len += p - in;
+ inl -= p - in;
+ num += p - in;
+ in = p;
+ }
+ else
+ {
+ memcpy(&(ctx->obuf[ctx->obuf_len]),
+ in,i);
+ ctx->obuf_len += i;
+ inl -= i;
+ in += i;
+ num += i;
+ }
+ }
+
+#ifdef DEBUG
+BIO_write(b->next_bio, "<*<", 3);
+#endif
+ i=BIO_write(b->next_bio,
+ ctx->obuf, ctx->obuf_len);
+ if (i <= 0)
+ {
+ ctx->obuf_len = orig_olen;
+ BIO_copy_next_retry(b);
+
+#ifdef DEBUG
+BIO_write(b->next_bio, ">*>", 3);
+#endif
+ if (i < 0) return((num > 0)?num:i);
+ if (i == 0) return(num);
+ }
+#ifdef DEBUG
+BIO_write(b->next_bio, ">*>", 3);
+#endif
+ if (i < ctx->obuf_len)
+ memmove(ctx->obuf, ctx->obuf + i,
+ ctx->obuf_len - i);
+ ctx->obuf_len-=i;
+ }
+
+ /* Now that the save buffer is emptied, let's write the input
+ buffer if a NL was found and there is anything to write. */
+ if ((foundnl || p - in > ctx->obuf_size) && p - in > 0)
+ {
+#ifdef DEBUG
+BIO_write(b->next_bio, "<*<", 3);
+#endif
+ i=BIO_write(b->next_bio,in,p - in);
+ if (i <= 0)
+ {
+ BIO_copy_next_retry(b);
+#ifdef DEBUG
+BIO_write(b->next_bio, ">*>", 3);
+#endif
+ if (i < 0) return((num > 0)?num:i);
+ if (i == 0) return(num);
+ }
+#ifdef DEBUG
+BIO_write(b->next_bio, ">*>", 3);
+#endif
+ num+=i;
+ in+=i;
+ inl-=i;
+ }
+ }
+ while(foundnl && inl > 0);
+ /* We've written as much as we can. The rest of the input buffer, if
+ any, is text that doesn't and with a NL and therefore needs to be
+ saved for the next trip. */
+ if (inl > 0)
+ {
+ memcpy(&(ctx->obuf[ctx->obuf_len]), in, inl);
+ ctx->obuf_len += inl;
+ num += inl;
+ }
+ return num;
+ }
+
+static long linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr)
+ {
+ BIO *dbio;
+ BIO_LINEBUFFER_CTX *ctx;
+ long ret=1;
+ char *p;
+ int r;
+ int obs;
+
+ ctx=(BIO_LINEBUFFER_CTX *)b->ptr;
+
+ switch (cmd)
+ {
+ case BIO_CTRL_RESET:
+ 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_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_C_SET_BUFF_SIZE:
+ obs=(int)num;
+ p=ctx->obuf;
+ if ((obs > DEFAULT_LINEBUFFER_SIZE) && (obs != ctx->obuf_size))
+ {
+ p=(char *)OPENSSL_malloc((int)num);
+ if (p == NULL)
+ goto malloc_error;
+ }
+ if (ctx->obuf != p)
+ {
+ if (ctx->obuf_len > obs)
+ {
+ ctx->obuf_len = obs;
+ }
+ memcpy(p, ctx->obuf, ctx->obuf_len);
+ OPENSSL_free(ctx->obuf);
+ ctx->obuf=p;
+ 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_len);
+#if 0
+fprintf(stderr,"FLUSH %3d -> %3d\n",ctx->obuf_len,r);
+#endif
+ BIO_copy_next_retry(b);
+ if (r <= 0) return((long)r);
+ if (r < ctx->obuf_len)
+ memmove(ctx->obuf, ctx->obuf + r,
+ ctx->obuf_len - r);
+ ctx->obuf_len-=r;
+ }
+ else
+ {
+ ctx->obuf_len=0;
+ ret=1;
+ break;
+ }
+ }
+ ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+ break;
+ case BIO_CTRL_DUP:
+ dbio=(BIO *)ptr;
+ if ( !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_LINEBUFFER_CTRL,ERR_R_MALLOC_FAILURE);
+ return(0);
+ }
+
+static long linebuffer_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 linebuffer_gets(BIO *b, char *buf, int size)
+ {
+ if (b->next_bio == NULL) return(0);
+ return(BIO_gets(b->next_bio,buf,size));
+ }
+
+static int linebuffer_puts(BIO *b, const char *str)
+ {
+ return(linebuffer_write(b,str,strlen(str)));
+ }
+
projects / openssl.git / commitdiff