1 /* $OpenBSD: bf_lbuf.c,v 1.14 2017/01/29 17:49:22 beck Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <openssl/bio.h>
63 #include <openssl/evp.h>
65 static int linebuffer_write(BIO
*h
, const char *buf
, int num
);
66 static int linebuffer_read(BIO
*h
, char *buf
, int size
);
67 static int linebuffer_puts(BIO
*h
, const char *str
);
68 static int linebuffer_gets(BIO
*h
, char *str
, int size
);
69 static long linebuffer_ctrl(BIO
*h
, int cmd
, long arg1
, void *arg2
);
70 static int linebuffer_new(BIO
*h
);
71 static int linebuffer_free(BIO
*data
);
72 static long linebuffer_callback_ctrl(BIO
*h
, int cmd
, bio_info_cb
*fp
);
74 /* A 10k maximum should be enough for most purposes */
75 #define DEFAULT_LINEBUFFER_SIZE 1024*10
79 static BIO_METHOD methods_linebuffer
= {
80 .type
= BIO_TYPE_LINEBUFFER
,
82 .bwrite
= linebuffer_write
,
83 .bread
= linebuffer_read
,
84 .bputs
= linebuffer_puts
,
85 .bgets
= linebuffer_gets
,
86 .ctrl
= linebuffer_ctrl
,
87 .create
= linebuffer_new
,
88 .destroy
= linebuffer_free
,
89 .callback_ctrl
= linebuffer_callback_ctrl
93 BIO_f_linebuffer(void)
95 return (&methods_linebuffer
);
98 typedef struct bio_linebuffer_ctx_struct
{
99 char *obuf
; /* the output char array */
100 int obuf_size
; /* how big is the output buffer */
101 int obuf_len
; /* how many bytes are in it */
102 } BIO_LINEBUFFER_CTX
;
105 linebuffer_new(BIO
*bi
)
107 BIO_LINEBUFFER_CTX
*ctx
;
109 ctx
= malloc(sizeof(BIO_LINEBUFFER_CTX
));
112 ctx
->obuf
= malloc(DEFAULT_LINEBUFFER_SIZE
);
113 if (ctx
->obuf
== NULL
) {
117 ctx
->obuf_size
= DEFAULT_LINEBUFFER_SIZE
;
121 bi
->ptr
= (char *)ctx
;
127 linebuffer_free(BIO
*a
)
129 BIO_LINEBUFFER_CTX
*b
;
133 b
= (BIO_LINEBUFFER_CTX
*)a
->ptr
;
143 linebuffer_read(BIO
*b
, char *out
, int outl
)
149 if (b
->next_bio
== NULL
)
151 ret
= BIO_read(b
->next_bio
, out
, outl
);
152 BIO_clear_retry_flags(b
);
153 BIO_copy_next_retry(b
);
158 linebuffer_write(BIO
*b
, const char *in
, int inl
)
160 int i
, num
= 0, foundnl
;
161 BIO_LINEBUFFER_CTX
*ctx
;
163 if ((in
== NULL
) || (inl
<= 0))
165 ctx
= (BIO_LINEBUFFER_CTX
*)b
->ptr
;
166 if ((ctx
== NULL
) || (b
->next_bio
== NULL
))
169 BIO_clear_retry_flags(b
);
174 for (p
= in
; p
< in
+ inl
&& *p
!= '\n'; p
++)
182 /* If a NL was found and we already have text in the save
183 buffer, concatenate them and write */
184 while ((foundnl
|| p
- in
> ctx
->obuf_size
- ctx
->obuf_len
) &&
186 int orig_olen
= ctx
->obuf_len
;
188 i
= ctx
->obuf_size
- ctx
->obuf_len
;
191 memcpy(&(ctx
->obuf
[ctx
->obuf_len
]),
193 ctx
->obuf_len
+= p
- in
;
198 memcpy(&(ctx
->obuf
[ctx
->obuf_len
]),
207 i
= BIO_write(b
->next_bio
, ctx
->obuf
, ctx
->obuf_len
);
209 ctx
->obuf_len
= orig_olen
;
210 BIO_copy_next_retry(b
);
212 return ((num
> 0) ? num
: i
);
216 if (i
< ctx
->obuf_len
)
217 memmove(ctx
->obuf
, ctx
->obuf
+ i
,
222 /* Now that the save buffer is emptied, let's write the input
223 buffer if a NL was found and there is anything to write. */
224 if ((foundnl
|| p
- in
> ctx
->obuf_size
) && p
- in
> 0) {
225 i
= BIO_write(b
->next_bio
, in
, p
- in
);
227 BIO_copy_next_retry(b
);
229 return ((num
> 0) ? num
: i
);
237 } while (foundnl
&& inl
> 0);
238 /* We've written as much as we can. The rest of the input buffer, if
239 any, is text that doesn't and with a NL and therefore needs to be
240 saved for the next trip. */
242 memcpy(&(ctx
->obuf
[ctx
->obuf_len
]), in
, inl
);
243 ctx
->obuf_len
+= inl
;
250 linebuffer_ctrl(BIO
*b
, int cmd
, long num
, void *ptr
)
253 BIO_LINEBUFFER_CTX
*ctx
;
259 ctx
= (BIO_LINEBUFFER_CTX
*)b
->ptr
;
264 if (b
->next_bio
== NULL
)
266 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
269 ret
= (long)ctx
->obuf_len
;
271 case BIO_CTRL_WPENDING
:
272 ret
= (long)ctx
->obuf_len
;
274 if (b
->next_bio
== NULL
)
276 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
279 case BIO_C_SET_BUFF_SIZE
:
282 if ((obs
> DEFAULT_LINEBUFFER_SIZE
) && (obs
!= ctx
->obuf_size
)) {
287 if (ctx
->obuf
!= p
) {
288 if (ctx
->obuf_len
> obs
) {
291 memcpy(p
, ctx
->obuf
, ctx
->obuf_len
);
294 ctx
->obuf_size
= obs
;
297 case BIO_C_DO_STATE_MACHINE
:
298 if (b
->next_bio
== NULL
)
300 BIO_clear_retry_flags(b
);
301 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
302 BIO_copy_next_retry(b
);
306 if (b
->next_bio
== NULL
)
308 if (ctx
->obuf_len
<= 0) {
309 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
314 BIO_clear_retry_flags(b
);
315 if (ctx
->obuf_len
> 0) {
316 r
= BIO_write(b
->next_bio
,
317 ctx
->obuf
, ctx
->obuf_len
);
318 BIO_copy_next_retry(b
);
321 if (r
< ctx
->obuf_len
)
322 memmove(ctx
->obuf
, ctx
->obuf
+ r
,
331 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
335 if (!BIO_set_write_buffer_size(dbio
, ctx
->obuf_size
))
339 if (b
->next_bio
== NULL
)
341 ret
= BIO_ctrl(b
->next_bio
, cmd
, num
, ptr
);
346 BIOerror(ERR_R_MALLOC_FAILURE
);
351 linebuffer_callback_ctrl(BIO
*b
, int cmd
, bio_info_cb
*fp
)
355 if (b
->next_bio
== NULL
)
359 ret
= BIO_callback_ctrl(b
->next_bio
, cmd
, fp
);
366 linebuffer_gets(BIO
*b
, char *buf
, int size
)
368 if (b
->next_bio
== NULL
)
370 return (BIO_gets(b
->next_bio
, buf
, size
));
374 linebuffer_puts(BIO
*b
, const char *str
)
376 return (linebuffer_write(b
, str
, strlen(str
)));