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,char *buf,int num);
65 static int mem_read(BIO *h,char *buf,int size);
66 static int mem_puts(BIO *h,char *str);
67 static int mem_gets(BIO *h,char *str,int size);
68 static long mem_ctrl(BIO *h,int cmd,long arg1,char *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)
167 BIO_set_retry_read(b);
173 static int mem_write(BIO *b, 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(bm,blen+inl) != (blen+inl))
195 memcpy(&(bm->data[blen]),in,inl);
201 static long mem_ctrl(BIO *b, int cmd, long num, char *ptr)
206 BUF_MEM *bm=(BUF_MEM *)b->ptr;
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;
216 memset(bm->data,0,bm->max);
222 ret=(long)(bm->length == 0);
224 case BIO_C_SET_BUF_MEM_EOF_RETURN:
228 ret=(long)bm->length;
232 *pptr=(char *)&(bm->data[0]);
235 case BIO_C_SET_BUF_MEM:
237 b->shutdown=(int)num;
240 case BIO_C_GET_BUF_MEM_PTR:
247 case BIO_CTRL_GET_CLOSE:
248 ret=(long)b->shutdown;
250 case BIO_CTRL_SET_CLOSE:
251 b->shutdown=(int)num;
254 case BIO_CTRL_WPENDING:
257 case BIO_CTRL_PENDING:
258 ret=(long)bm->length;
273 static int mem_gets(BIO *bp, char *buf, int size)
278 BUF_MEM *bm=(BUF_MEM *)bp->ptr;
280 BIO_clear_retry_flags(bp);
282 if (j <= 0) return(0);
286 if (p[i] == '\n') break;
290 BIO_set_retry_read(bp);
291 /* return(-1); change the semantics 0.6.6a */
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';
303 static int mem_puts(BIO *bp, char *str)
308 ret=mem_write(bp,str,n);
309 /* memory semantics is that it will always work */