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diff --git a/src/lib/libcrypto/bio/bss_mem.c b/src/lib/libcrypto/bio/bss_mem.c
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1/* crypto/bio/bss_mem.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 "bio.h"
63
64#ifndef NOPROTO
65static int mem_write(BIO *h,char *buf,int num);
66static int mem_read(BIO *h,char *buf,int size);
67static int mem_puts(BIO *h,char *str);
68static int mem_gets(BIO *h,char *str,int size);
69static long mem_ctrl(BIO *h,int cmd,long arg1,char *arg2);
70static int mem_new(BIO *h);
71static int mem_free(BIO *data);
72#else
73static int mem_write();
74static int mem_read();
75static int mem_puts();
76static int mem_gets();
77static long mem_ctrl();
78static int mem_new();
79static int mem_free();
80#endif
81
82static BIO_METHOD mem_method=
83 {
84 BIO_TYPE_MEM,
85 "memory buffer",
86 mem_write,
87 mem_read,
88 mem_puts,
89 mem_gets,
90 mem_ctrl,
91 mem_new,
92 mem_free,
93 };
94
95BIO_METHOD *BIO_s_mem()
96 {
97 return(&mem_method);
98 }
99
100static int mem_new(bi)
101BIO *bi;
102 {
103 BUF_MEM *b;
104
105 if ((b=BUF_MEM_new()) == NULL)
106 return(0);
107 bi->shutdown=1;
108 bi->init=1;
109 bi->num=0;
110 bi->ptr=(char *)b;
111 return(1);
112 }
113
114static int mem_free(a)
115BIO *a;
116 {
117 if (a == NULL) return(0);
118 if (a->shutdown)
119 {
120 if ((a->init) && (a->ptr != NULL))
121 {
122 BUF_MEM_free((BUF_MEM *)a->ptr);
123 a->ptr=NULL;
124 }
125 }
126 return(1);
127 }
128
129static int mem_read(b,out,outl)
130BIO *b;
131char *out;
132int outl;
133 {
134 int ret= -1;
135 BUF_MEM *bm;
136 int i;
137 char *from,*to;
138
139 bm=(BUF_MEM *)b->ptr;
140 BIO_clear_retry_flags(b);
141 ret=(outl > bm->length)?bm->length:outl;
142 if ((out != NULL) && (ret > 0))
143 {
144 memcpy(out,bm->data,ret);
145 bm->length-=ret;
146 /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
147 from=(char *)&(bm->data[ret]);
148 to=(char *)&(bm->data[0]);
149 for (i=0; i<bm->length; i++)
150 to[i]=from[i];
151 }
152 else if (bm->length == 0)
153 {
154 BIO_set_retry_read(b);
155 ret= -1;
156 }
157 return(ret);
158 }
159
160static int mem_write(b,in,inl)
161BIO *b;
162char *in;
163int inl;
164 {
165 int ret= -1;
166 int blen;
167 BUF_MEM *bm;
168
169 bm=(BUF_MEM *)b->ptr;
170 if (in == NULL)
171 {
172 BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
173 goto end;
174 }
175
176 BIO_clear_retry_flags(b);
177 blen=bm->length;
178 if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
179 goto end;
180 memcpy(&(bm->data[blen]),in,inl);
181 ret=inl;
182end:
183 return(ret);
184 }
185
186static long mem_ctrl(b,cmd,num,ptr)
187BIO *b;
188int cmd;
189long num;
190char *ptr;
191 {
192 long ret=1;
193 char **pptr;
194
195 BUF_MEM *bm=(BUF_MEM *)b->ptr;
196
197 switch (cmd)
198 {
199 case BIO_CTRL_RESET:
200 if (bm->data != NULL)
201 memset(bm->data,0,bm->max);
202 bm->length=0;
203 break;
204 case BIO_CTRL_EOF:
205 ret=(long)(bm->length == 0);
206 break;
207 case BIO_CTRL_INFO:
208 ret=(long)bm->length;
209 if (ptr != NULL)
210 {
211 pptr=(char **)ptr;
212 *pptr=(char *)&(bm->data[0]);
213 }
214 break;
215 case BIO_C_SET_BUF_MEM:
216 mem_free(b);
217 b->shutdown=(int)num;
218 b->ptr=ptr;
219 break;
220 case BIO_C_GET_BUF_MEM_PTR:
221 if (ptr != NULL)
222 {
223 pptr=(char **)ptr;
224 *pptr=(char *)bm;
225 }
226 break;
227 case BIO_CTRL_GET_CLOSE:
228 ret=(long)b->shutdown;
229 break;
230 case BIO_CTRL_SET_CLOSE:
231 b->shutdown=(int)num;
232 break;
233
234 case BIO_CTRL_WPENDING:
235 ret=0L;
236 break;
237 case BIO_CTRL_PENDING:
238 ret=(long)bm->length;
239 break;
240 case BIO_CTRL_DUP:
241 case BIO_CTRL_FLUSH:
242 ret=1;
243 break;
244 case BIO_CTRL_PUSH:
245 case BIO_CTRL_POP:
246 default:
247 ret=0;
248 break;
249 }
250 return(ret);
251 }
252
253static int mem_gets(bp,buf,size)
254BIO *bp;
255char *buf;
256int size;
257 {
258 int i,j;
259 int ret= -1;
260 char *p;
261 BUF_MEM *bm=(BUF_MEM *)bp->ptr;
262
263 BIO_clear_retry_flags(bp);
264 j=bm->length;
265 if (j <= 0) return(0);
266 p=bm->data;
267 for (i=0; i<j; i++)
268 {
269 if (p[i] == '\n') break;
270 }
271 if (i == j)
272 {
273 BIO_set_retry_read(bp);
274 /* return(-1); change the semantics 0.6.6a */
275 }
276 else
277 i++;
278 /* i is the max to copy */
279 if ((size-1) < i) i=size-1;
280 i=mem_read(bp,buf,i);
281 if (i > 0) buf[i]='\0';
282 ret=i;
283 return(ret);
284 }
285
286static int mem_puts(bp,str)
287BIO *bp;
288char *str;
289 {
290 int n,ret;
291
292 n=strlen(str);
293 ret=mem_write(bp,str,n);
294 /* memory semantics is that it will always work */
295 return(ret);
296 }
297
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