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 */