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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 <openssl/bio.h>
63
64static int mem_write(BIO *h,char *buf,int num);
65static int mem_read(BIO *h,char *buf,int size);
66static int mem_puts(BIO *h,char *str);
67static int mem_gets(BIO *h,char *str,int size);
68static long mem_ctrl(BIO *h,int cmd,long arg1,char *arg2);
69static int mem_new(BIO *h);
70static int mem_free(BIO *data);
71static BIO_METHOD mem_method=
72 {
73 BIO_TYPE_MEM,
74 "memory buffer",
75 mem_write,
76 mem_read,
77 mem_puts,
78 mem_gets,
79 mem_ctrl,
80 mem_new,
81 mem_free,
82 NULL,
83 };
84
85/* bio->num is used to hold the value to return on 'empty', if it is
86 * 0, should_retry is not set */
87
88BIO_METHOD *BIO_s_mem(void)
89 {
90 return(&mem_method);
91 }
92
93BIO *BIO_new_mem_buf(void *buf, int len)
94{
95 BIO *ret;
96 BUF_MEM *b;
97 if (!buf) {
98 BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER);
99 return NULL;
100 }
101 if(len == -1) len = strlen(buf);
102 if(!(ret = BIO_new(BIO_s_mem())) ) return NULL;
103 b = (BUF_MEM *)ret->ptr;
104 b->data = buf;
105 b->length = len;
106 b->max = len;
107 ret->flags |= BIO_FLAGS_MEM_RDONLY;
108 /* Since this is static data retrying wont help */
109 ret->num = 0;
110 return ret;
111}
112
113static int mem_new(BIO *bi)
114 {
115 BUF_MEM *b;
116
117 if ((b=BUF_MEM_new()) == NULL)
118 return(0);
119 bi->shutdown=1;
120 bi->init=1;
121 bi->num= -1;
122 bi->ptr=(char *)b;
123 return(1);
124 }
125
126static int mem_free(BIO *a)
127 {
128 if (a == NULL) return(0);
129 if (a->shutdown)
130 {
131 if ((a->init) && (a->ptr != NULL))
132 {
133 BUF_MEM *b;
134 b = (BUF_MEM *)a->ptr;
135 if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL;
136 BUF_MEM_free(b);
137 a->ptr=NULL;
138 }
139 }
140 return(1);
141 }
142
143static int mem_read(BIO *b, char *out, int outl)
144 {
145 int ret= -1;
146 BUF_MEM *bm;
147 int i;
148 char *from,*to;
149
150 bm=(BUF_MEM *)b->ptr;
151 BIO_clear_retry_flags(b);
152 ret=(outl > bm->length)?bm->length:outl;
153 if ((out != NULL) && (ret > 0)) {
154 memcpy(out,bm->data,ret);
155 bm->length-=ret;
156 /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
157 if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret;
158 else {
159 from=(char *)&(bm->data[ret]);
160 to=(char *)&(bm->data[0]);
161 for (i=0; i<bm->length; i++)
162 to[i]=from[i];
163 }
164 } else if (bm->length == 0)
165 {
166 if (b->num != 0)
167 BIO_set_retry_read(b);
168 ret= b->num;
169 }
170 return(ret);
171 }
172
173static int mem_write(BIO *b, char *in, int inl)
174 {
175 int ret= -1;
176 int blen;
177 BUF_MEM *bm;
178
179 bm=(BUF_MEM *)b->ptr;
180 if (in == NULL)
181 {
182 BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
183 goto end;
184 }
185
186 if(b->flags & BIO_FLAGS_MEM_RDONLY) {
187 BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO);
188 goto end;
189 }
190
191 BIO_clear_retry_flags(b);
192 blen=bm->length;
193 if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
194 goto end;
195 memcpy(&(bm->data[blen]),in,inl);
196 ret=inl;
197end:
198 return(ret);
199 }
200
201static long mem_ctrl(BIO *b, int cmd, long num, char *ptr)
202 {
203 long ret=1;
204 char **pptr;
205
206 BUF_MEM *bm=(BUF_MEM *)b->ptr;
207
208 switch (cmd)
209 {
210 case BIO_CTRL_RESET:
211 if (bm->data != NULL) {
212 /* For read only case reset to the start again */
213 if(b->flags & BIO_FLAGS_MEM_RDONLY)
214 bm->data -= bm->max - bm->length;
215 else {
216 memset(bm->data,0,bm->max);
217 bm->length=0;
218 }
219 }
220 break;
221 case BIO_CTRL_EOF:
222 ret=(long)(bm->length == 0);
223 break;
224 case BIO_C_SET_BUF_MEM_EOF_RETURN:
225 b->num=(int)num;
226 break;
227 case BIO_CTRL_INFO:
228 ret=(long)bm->length;
229 if (ptr != NULL)
230 {
231 pptr=(char **)ptr;
232 *pptr=(char *)&(bm->data[0]);
233 }
234 break;
235 case BIO_C_SET_BUF_MEM:
236 mem_free(b);
237 b->shutdown=(int)num;
238 b->ptr=ptr;
239 break;
240 case BIO_C_GET_BUF_MEM_PTR:
241 if (ptr != NULL)
242 {
243 pptr=(char **)ptr;
244 *pptr=(char *)bm;
245 }
246 break;
247 case BIO_CTRL_GET_CLOSE:
248 ret=(long)b->shutdown;
249 break;
250 case BIO_CTRL_SET_CLOSE:
251 b->shutdown=(int)num;
252 break;
253
254 case BIO_CTRL_WPENDING:
255 ret=0L;
256 break;
257 case BIO_CTRL_PENDING:
258 ret=(long)bm->length;
259 break;
260 case BIO_CTRL_DUP:
261 case BIO_CTRL_FLUSH:
262 ret=1;
263 break;
264 case BIO_CTRL_PUSH:
265 case BIO_CTRL_POP:
266 default:
267 ret=0;
268 break;
269 }
270 return(ret);
271 }
272
273static int mem_gets(BIO *bp, char *buf, int size)
274 {
275 int i,j;
276 int ret= -1;
277 char *p;
278 BUF_MEM *bm=(BUF_MEM *)bp->ptr;
279
280 BIO_clear_retry_flags(bp);
281 j=bm->length;
282 if (j <= 0) return(0);
283 p=bm->data;
284 for (i=0; i<j; i++)
285 {
286 if (p[i] == '\n') break;
287 }
288 if (i == j)
289 {
290 BIO_set_retry_read(bp);
291 /* return(-1); change the semantics 0.6.6a */
292 }
293 else
294 i++;
295 /* i is the max to copy */
296 if ((size-1) < i) i=size-1;
297 i=mem_read(bp,buf,i);
298 if (i > 0) buf[i]='\0';
299 ret=i;
300 return(ret);
301 }
302
303static int mem_puts(BIO *bp, char *str)
304 {
305 int n,ret;
306
307 n=strlen(str);
308 ret=mem_write(bp,str,n);
309 /* memory semantics is that it will always work */
310 return(ret);
311 }
312
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