1
/* crypto/bio/bss_mem.c */
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>
64
static int mem_write(BIO *h, const char *buf, int num);
65
static int mem_read(BIO *h, char *buf, int size);
66
static int mem_puts(BIO *h, const char *str);
67
static int mem_gets(BIO *h, char *str, int size);
68
static long mem_ctrl(BIO *h, int cmd, long arg1, void *arg2);
69
static int mem_new(BIO *h);
70
static int mem_free(BIO *data);
71
static BIO_METHOD mem_method=
85
/* bio->num is used to hold the value to return on 'empty', if it is
86
* 0, should_retry is not set */
88
BIO_METHOD *BIO_s_mem(void)
93
BIO *BIO_new_mem_buf(void *buf, int len)
98
BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER);
101
if(len == -1) len = strlen(buf);
102
if(!(ret = BIO_new(BIO_s_mem())) ) return NULL;
103
b = (BUF_MEM *)ret->ptr;
107
ret->flags |= BIO_FLAGS_MEM_RDONLY;
108
/* Since this is static data retrying wont help */
113
static int mem_new(BIO *bi)
117
if ((b=BUF_MEM_new()) == NULL)
126
static int mem_free(BIO *a)
128
if (a == NULL) return(0);
131
if ((a->init) && (a->ptr != NULL))
134
b = (BUF_MEM *)a->ptr;
135
if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL;
143
static int mem_read(BIO *b, char *out, int outl)
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);
156
/* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
157
if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret;
159
from=(char *)&(bm->data[ret]);
160
to=(char *)&(bm->data[0]);
161
for (i=0; i<bm->length; i++)
164
} else if (bm->length == 0)
168
BIO_set_retry_read(b);
173
static int mem_write(BIO *b, const char *in, int inl)
179
bm=(BUF_MEM *)b->ptr;
182
BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
186
if(b->flags & BIO_FLAGS_MEM_RDONLY) {
187
BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO);
191
BIO_clear_retry_flags(b);
193
if (BUF_MEM_grow_clean(bm,blen+inl) != (blen+inl))
195
memcpy(&(bm->data[blen]),in,inl);
201
static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
206
BUF_MEM *bm=(BUF_MEM *)b->ptr;
211
if (bm->data != NULL)
213
/* For read only case reset to the start again */
214
if(b->flags & BIO_FLAGS_MEM_RDONLY)
216
bm->data -= bm->max - bm->length;
217
bm->length = bm->max;
221
memset(bm->data,0,bm->max);
227
ret=(long)(bm->length == 0);
229
case BIO_C_SET_BUF_MEM_EOF_RETURN:
233
ret=(long)bm->length;
237
*pptr=(char *)&(bm->data[0]);
240
case BIO_C_SET_BUF_MEM:
242
b->shutdown=(int)num;
245
case BIO_C_GET_BUF_MEM_PTR:
252
case BIO_CTRL_GET_CLOSE:
253
ret=(long)b->shutdown;
255
case BIO_CTRL_SET_CLOSE:
256
b->shutdown=(int)num;
259
case BIO_CTRL_WPENDING:
262
case BIO_CTRL_PENDING:
263
ret=(long)bm->length;
278
static int mem_gets(BIO *bp, char *buf, int size)
283
BUF_MEM *bm=(BUF_MEM *)bp->ptr;
285
BIO_clear_retry_flags(bp);
295
if (p[i] == '\n') break;
299
BIO_set_retry_read(bp);
300
/* return(-1); change the semantics 0.6.6a */
304
/* i is the max to copy */
305
if ((size-1) < i) i=size-1;
306
i=mem_read(bp,buf,i);
307
if (i > 0) buf[i]='\0';
312
static int mem_puts(BIO *bp, const char *str)
317
ret=mem_write(bp,str,n);
318
/* memory semantics is that it will always work */