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-rw-r--r--src/lib/libcrypto/bio/bss_mem.c276
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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 };
83
84/* bio->num is used to hold the value to return on 'empty', if it is
85 * 0, should_retry is not set */
86
87BIO_METHOD *BIO_s_mem(void)
88 {
89 return(&mem_method);
90 }
91
92static int mem_new(BIO *bi)
93 {
94 BUF_MEM *b;
95
96 if ((b=BUF_MEM_new()) == NULL)
97 return(0);
98 bi->shutdown=1;
99 bi->init=1;
100 bi->num= -1;
101 bi->ptr=(char *)b;
102 return(1);
103 }
104
105static int mem_free(BIO *a)
106 {
107 if (a == NULL) return(0);
108 if (a->shutdown)
109 {
110 if ((a->init) && (a->ptr != NULL))
111 {
112 BUF_MEM_free((BUF_MEM *)a->ptr);
113 a->ptr=NULL;
114 }
115 }
116 return(1);
117 }
118
119static int mem_read(BIO *b, char *out, int outl)
120 {
121 int ret= -1;
122 BUF_MEM *bm;
123 int i;
124 char *from,*to;
125
126 bm=(BUF_MEM *)b->ptr;
127 BIO_clear_retry_flags(b);
128 ret=(outl > bm->length)?bm->length:outl;
129 if ((out != NULL) && (ret > 0))
130 {
131 memcpy(out,bm->data,ret);
132 bm->length-=ret;
133 /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
134 from=(char *)&(bm->data[ret]);
135 to=(char *)&(bm->data[0]);
136 for (i=0; i<bm->length; i++)
137 to[i]=from[i];
138 }
139 else if (bm->length == 0)
140 {
141 if (b->num != 0)
142 BIO_set_retry_read(b);
143 ret= b->num;
144 }
145 return(ret);
146 }
147
148static int mem_write(BIO *b, char *in, int inl)
149 {
150 int ret= -1;
151 int blen;
152 BUF_MEM *bm;
153
154 bm=(BUF_MEM *)b->ptr;
155 if (in == NULL)
156 {
157 BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
158 goto end;
159 }
160
161 BIO_clear_retry_flags(b);
162 blen=bm->length;
163 if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
164 goto end;
165 memcpy(&(bm->data[blen]),in,inl);
166 ret=inl;
167end:
168 return(ret);
169 }
170
171static long mem_ctrl(BIO *b, int cmd, long num, char *ptr)
172 {
173 long ret=1;
174 char **pptr;
175
176 BUF_MEM *bm=(BUF_MEM *)b->ptr;
177
178 switch (cmd)
179 {
180 case BIO_CTRL_RESET:
181 if (bm->data != NULL)
182 memset(bm->data,0,bm->max);
183 bm->length=0;
184 break;
185 case BIO_CTRL_EOF:
186 ret=(long)(bm->length == 0);
187 break;
188 case BIO_C_SET_BUF_MEM_EOF_RETURN:
189 b->num=(int)num;
190 break;
191 case BIO_CTRL_INFO:
192 ret=(long)bm->length;
193 if (ptr != NULL)
194 {
195 pptr=(char **)ptr;
196 *pptr=(char *)&(bm->data[0]);
197 }
198 break;
199 case BIO_C_SET_BUF_MEM:
200 mem_free(b);
201 b->shutdown=(int)num;
202 b->ptr=ptr;
203 break;
204 case BIO_C_GET_BUF_MEM_PTR:
205 if (ptr != NULL)
206 {
207 pptr=(char **)ptr;
208 *pptr=(char *)bm;
209 }
210 break;
211 case BIO_CTRL_GET_CLOSE:
212 ret=(long)b->shutdown;
213 break;
214 case BIO_CTRL_SET_CLOSE:
215 b->shutdown=(int)num;
216 break;
217
218 case BIO_CTRL_WPENDING:
219 ret=0L;
220 break;
221 case BIO_CTRL_PENDING:
222 ret=(long)bm->length;
223 break;
224 case BIO_CTRL_DUP:
225 case BIO_CTRL_FLUSH:
226 ret=1;
227 break;
228 case BIO_CTRL_PUSH:
229 case BIO_CTRL_POP:
230 default:
231 ret=0;
232 break;
233 }
234 return(ret);
235 }
236
237static int mem_gets(BIO *bp, char *buf, int size)
238 {
239 int i,j;
240 int ret= -1;
241 char *p;
242 BUF_MEM *bm=(BUF_MEM *)bp->ptr;
243
244 BIO_clear_retry_flags(bp);
245 j=bm->length;
246 if (j <= 0) return(0);
247 p=bm->data;
248 for (i=0; i<j; i++)
249 {
250 if (p[i] == '\n') break;
251 }
252 if (i == j)
253 {
254 BIO_set_retry_read(bp);
255 /* return(-1); change the semantics 0.6.6a */
256 }
257 else
258 i++;
259 /* i is the max to copy */
260 if ((size-1) < i) i=size-1;
261 i=mem_read(bp,buf,i);
262 if (i > 0) buf[i]='\0';
263 ret=i;
264 return(ret);
265 }
266
267static int mem_puts(BIO *bp, char *str)
268 {
269 int n,ret;
270
271 n=strlen(str);
272 ret=mem_write(bp,str,n);
273 /* memory semantics is that it will always work */
274 return(ret);
275 }
276
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