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-rw-r--r--src/lib/libcrypto/bio/bf_lbuf.c397
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diff --git a/src/lib/libcrypto/bio/bf_lbuf.c b/src/lib/libcrypto/bio/bf_lbuf.c
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1/* crypto/bio/bf_buff.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include <errno.h>
61#include "cryptlib.h"
62#include <openssl/bio.h>
63#include <openssl/evp.h>
64
65static int linebuffer_write(BIO *h, const char *buf,int num);
66static int linebuffer_read(BIO *h, char *buf, int size);
67static int linebuffer_puts(BIO *h, const char *str);
68static int linebuffer_gets(BIO *h, char *str, int size);
69static long linebuffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
70static int linebuffer_new(BIO *h);
71static int linebuffer_free(BIO *data);
72static long linebuffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
73
74/* A 10k maximum should be enough for most purposes */
75#define DEFAULT_LINEBUFFER_SIZE 1024*10
76
77/* #define DEBUG */
78
79static BIO_METHOD methods_linebuffer=
80 {
81 BIO_TYPE_LINEBUFFER,
82 "linebuffer",
83 linebuffer_write,
84 linebuffer_read,
85 linebuffer_puts,
86 linebuffer_gets,
87 linebuffer_ctrl,
88 linebuffer_new,
89 linebuffer_free,
90 linebuffer_callback_ctrl,
91 };
92
93BIO_METHOD *BIO_f_linebuffer(void)
94 {
95 return(&methods_linebuffer);
96 }
97
98typedef struct bio_linebuffer_ctx_struct
99 {
100 char *obuf; /* the output char array */
101 int obuf_size; /* how big is the output buffer */
102 int obuf_len; /* how many bytes are in it */
103 } BIO_LINEBUFFER_CTX;
104
105static int linebuffer_new(BIO *bi)
106 {
107 BIO_LINEBUFFER_CTX *ctx;
108
109 ctx=(BIO_LINEBUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_LINEBUFFER_CTX));
110 if (ctx == NULL) return(0);
111 ctx->obuf=(char *)OPENSSL_malloc(DEFAULT_LINEBUFFER_SIZE);
112 if (ctx->obuf == NULL) { OPENSSL_free(ctx); return(0); }
113 ctx->obuf_size=DEFAULT_LINEBUFFER_SIZE;
114 ctx->obuf_len=0;
115
116 bi->init=1;
117 bi->ptr=(char *)ctx;
118 bi->flags=0;
119 return(1);
120 }
121
122static int linebuffer_free(BIO *a)
123 {
124 BIO_LINEBUFFER_CTX *b;
125
126 if (a == NULL) return(0);
127 b=(BIO_LINEBUFFER_CTX *)a->ptr;
128 if (b->obuf != NULL) OPENSSL_free(b->obuf);
129 OPENSSL_free(a->ptr);
130 a->ptr=NULL;
131 a->init=0;
132 a->flags=0;
133 return(1);
134 }
135
136static int linebuffer_read(BIO *b, char *out, int outl)
137 {
138 int ret=0;
139
140 if (out == NULL) return(0);
141 if (b->next_bio == NULL) return(0);
142 ret=BIO_read(b->next_bio,out,outl);
143 BIO_clear_retry_flags(b);
144 BIO_copy_next_retry(b);
145 return(ret);
146 }
147
148static int linebuffer_write(BIO *b, const char *in, int inl)
149 {
150 int i,num=0,foundnl;
151 BIO_LINEBUFFER_CTX *ctx;
152
153 if ((in == NULL) || (inl <= 0)) return(0);
154 ctx=(BIO_LINEBUFFER_CTX *)b->ptr;
155 if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
156
157 BIO_clear_retry_flags(b);
158
159 do
160 {
161 const char *p;
162
163 for(p = in; p < in + inl && *p != '\n'; p++)
164 ;
165 if (*p == '\n')
166 {
167 p++;
168 foundnl = 1;
169 }
170 else
171 foundnl = 0;
172
173 /* If a NL was found and we already have text in the save
174 buffer, concatenate them and write */
175 while ((foundnl || p - in > ctx->obuf_size - ctx->obuf_len)
176 && ctx->obuf_len > 0)
177 {
178 int orig_olen = ctx->obuf_len;
179
180 i = ctx->obuf_size - ctx->obuf_len;
181 if (p - in > 0)
182 {
183 if (i >= p - in)
184 {
185 memcpy(&(ctx->obuf[ctx->obuf_len]),
186 in,p - in);
187 ctx->obuf_len += p - in;
188 inl -= p - in;
189 num += p - in;
190 in = p;
191 }
192 else
193 {
194 memcpy(&(ctx->obuf[ctx->obuf_len]),
195 in,i);
196 ctx->obuf_len += i;
197 inl -= i;
198 in += i;
199 num += i;
200 }
201 }
202
203#if 0
204BIO_write(b->next_bio, "<*<", 3);
205#endif
206 i=BIO_write(b->next_bio,
207 ctx->obuf, ctx->obuf_len);
208 if (i <= 0)
209 {
210 ctx->obuf_len = orig_olen;
211 BIO_copy_next_retry(b);
212
213#if 0
214BIO_write(b->next_bio, ">*>", 3);
215#endif
216 if (i < 0) return((num > 0)?num:i);
217 if (i == 0) return(num);
218 }
219#if 0
220BIO_write(b->next_bio, ">*>", 3);
221#endif
222 if (i < ctx->obuf_len)
223 memmove(ctx->obuf, ctx->obuf + i,
224 ctx->obuf_len - i);
225 ctx->obuf_len-=i;
226 }
227
228 /* Now that the save buffer is emptied, let's write the input
229 buffer if a NL was found and there is anything to write. */
230 if ((foundnl || p - in > ctx->obuf_size) && p - in > 0)
231 {
232#if 0
233BIO_write(b->next_bio, "<*<", 3);
234#endif
235 i=BIO_write(b->next_bio,in,p - in);
236 if (i <= 0)
237 {
238 BIO_copy_next_retry(b);
239#if 0
240BIO_write(b->next_bio, ">*>", 3);
241#endif
242 if (i < 0) return((num > 0)?num:i);
243 if (i == 0) return(num);
244 }
245#if 0
246BIO_write(b->next_bio, ">*>", 3);
247#endif
248 num+=i;
249 in+=i;
250 inl-=i;
251 }
252 }
253 while(foundnl && inl > 0);
254 /* We've written as much as we can. The rest of the input buffer, if
255 any, is text that doesn't and with a NL and therefore needs to be
256 saved for the next trip. */
257 if (inl > 0)
258 {
259 memcpy(&(ctx->obuf[ctx->obuf_len]), in, inl);
260 ctx->obuf_len += inl;
261 num += inl;
262 }
263 return num;
264 }
265
266static long linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr)
267 {
268 BIO *dbio;
269 BIO_LINEBUFFER_CTX *ctx;
270 long ret=1;
271 char *p;
272 int r;
273 int obs;
274
275 ctx=(BIO_LINEBUFFER_CTX *)b->ptr;
276
277 switch (cmd)
278 {
279 case BIO_CTRL_RESET:
280 ctx->obuf_len=0;
281 if (b->next_bio == NULL) return(0);
282 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
283 break;
284 case BIO_CTRL_INFO:
285 ret=(long)ctx->obuf_len;
286 break;
287 case BIO_CTRL_WPENDING:
288 ret=(long)ctx->obuf_len;
289 if (ret == 0)
290 {
291 if (b->next_bio == NULL) return(0);
292 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
293 }
294 break;
295 case BIO_C_SET_BUFF_SIZE:
296 obs=(int)num;
297 p=ctx->obuf;
298 if ((obs > DEFAULT_LINEBUFFER_SIZE) && (obs != ctx->obuf_size))
299 {
300 p=(char *)OPENSSL_malloc((int)num);
301 if (p == NULL)
302 goto malloc_error;
303 }
304 if (ctx->obuf != p)
305 {
306 if (ctx->obuf_len > obs)
307 {
308 ctx->obuf_len = obs;
309 }
310 memcpy(p, ctx->obuf, ctx->obuf_len);
311 OPENSSL_free(ctx->obuf);
312 ctx->obuf=p;
313 ctx->obuf_size=obs;
314 }
315 break;
316 case BIO_C_DO_STATE_MACHINE:
317 if (b->next_bio == NULL) return(0);
318 BIO_clear_retry_flags(b);
319 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
320 BIO_copy_next_retry(b);
321 break;
322
323 case BIO_CTRL_FLUSH:
324 if (b->next_bio == NULL) return(0);
325 if (ctx->obuf_len <= 0)
326 {
327 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
328 break;
329 }
330
331 for (;;)
332 {
333 BIO_clear_retry_flags(b);
334 if (ctx->obuf_len > 0)
335 {
336 r=BIO_write(b->next_bio,
337 ctx->obuf, ctx->obuf_len);
338#if 0
339fprintf(stderr,"FLUSH %3d -> %3d\n",ctx->obuf_len,r);
340#endif
341 BIO_copy_next_retry(b);
342 if (r <= 0) return((long)r);
343 if (r < ctx->obuf_len)
344 memmove(ctx->obuf, ctx->obuf + r,
345 ctx->obuf_len - r);
346 ctx->obuf_len-=r;
347 }
348 else
349 {
350 ctx->obuf_len=0;
351 ret=1;
352 break;
353 }
354 }
355 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
356 break;
357 case BIO_CTRL_DUP:
358 dbio=(BIO *)ptr;
359 if ( !BIO_set_write_buffer_size(dbio,ctx->obuf_size))
360 ret=0;
361 break;
362 default:
363 if (b->next_bio == NULL) return(0);
364 ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
365 break;
366 }
367 return(ret);
368malloc_error:
369 BIOerr(BIO_F_LINEBUFFER_CTRL,ERR_R_MALLOC_FAILURE);
370 return(0);
371 }
372
373static long linebuffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
374 {
375 long ret=1;
376
377 if (b->next_bio == NULL) return(0);
378 switch (cmd)
379 {
380 default:
381 ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
382 break;
383 }
384 return(ret);
385 }
386
387static int linebuffer_gets(BIO *b, char *buf, int size)
388 {
389 if (b->next_bio == NULL) return(0);
390 return(BIO_gets(b->next_bio,buf,size));
391 }
392
393static int linebuffer_puts(BIO *b, const char *str)
394 {
395 return(linebuffer_write(b,str,strlen(str)));
396 }
397
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