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.]
65 static int mem_write(BIO *h,char *buf,int num);
66 static int mem_read(BIO *h,char *buf,int size);
67 static int mem_puts(BIO *h,char *str);
68 static int mem_gets(BIO *h,char *str,int size);
69 static long mem_ctrl(BIO *h,int cmd,long arg1,char *arg2);
70 static int mem_new(BIO *h);
71 static int mem_free(BIO *data);
73 static int mem_write();
74 static int mem_read();
75 static int mem_puts();
76 static int mem_gets();
77 static long mem_ctrl();
79 static int mem_free();
82 static BIO_METHOD mem_method=
95 /* bio->num is used to hold the value to return on 'empty', if it is
96 * 0, should_retry is not set */
98 BIO_METHOD *BIO_s_mem()
103 static int mem_new(bi)
108 if ((b=BUF_MEM_new()) == NULL)
117 static int mem_free(a)
120 if (a == NULL) return(0);
123 if ((a->init) && (a->ptr != NULL))
125 BUF_MEM_free((BUF_MEM *)a->ptr);
132 static int mem_read(b,out,outl)
142 bm=(BUF_MEM *)b->ptr;
143 BIO_clear_retry_flags(b);
144 ret=(outl > bm->length)?bm->length:outl;
145 if ((out != NULL) && (ret > 0))
147 memcpy(out,bm->data,ret);
149 /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
150 from=(char *)&(bm->data[ret]);
151 to=(char *)&(bm->data[0]);
152 for (i=0; i<bm->length; i++)
155 else if (bm->length == 0)
158 BIO_set_retry_read(b);
164 static int mem_write(b,in,inl)
173 bm=(BUF_MEM *)b->ptr;
176 BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
180 BIO_clear_retry_flags(b);
182 if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
184 memcpy(&(bm->data[blen]),in,inl);
190 static long mem_ctrl(b,cmd,num,ptr)
199 BUF_MEM *bm=(BUF_MEM *)b->ptr;
204 if (bm->data != NULL)
205 memset(bm->data,0,bm->max);
209 ret=(long)(bm->length == 0);
211 case BIO_C_SET_BUF_MEM_EOF_RETURN:
215 ret=(long)bm->length;
219 *pptr=(char *)&(bm->data[0]);
222 case BIO_C_SET_BUF_MEM:
224 b->shutdown=(int)num;
227 case BIO_C_GET_BUF_MEM_PTR:
234 case BIO_CTRL_GET_CLOSE:
235 ret=(long)b->shutdown;
237 case BIO_CTRL_SET_CLOSE:
238 b->shutdown=(int)num;
241 case BIO_CTRL_WPENDING:
244 case BIO_CTRL_PENDING:
245 ret=(long)bm->length;
260 static int mem_gets(bp,buf,size)
268 BUF_MEM *bm=(BUF_MEM *)bp->ptr;
270 BIO_clear_retry_flags(bp);
272 if (j <= 0) return(0);
276 if (p[i] == '\n') break;
280 BIO_set_retry_read(bp);
281 /* return(-1); change the semantics 0.6.6a */
285 /* i is the max to copy */
286 if ((size-1) < i) i=size-1;
287 i=mem_read(bp,buf,i);
288 if (i > 0) buf[i]='\0';
293 static int mem_puts(bp,str)
300 ret=mem_write(bp,str,n);
301 /* memory semantics is that it will always work */