diff options
Diffstat (limited to 'crypto/bio/bss_mem.c')
| -rw-r--r-- | crypto/bio/bss_mem.c | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/crypto/bio/bss_mem.c b/crypto/bio/bss_mem.c new file mode 100644 index 000000000000..a4edb711aec1 --- /dev/null +++ b/crypto/bio/bss_mem.c @@ -0,0 +1,321 @@ +/* crypto/bio/bss_mem.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <errno.h> +#include "cryptlib.h" +#include <openssl/bio.h> + +static int mem_write(BIO *h, const char *buf, int num); +static int mem_read(BIO *h, char *buf, int size); +static int mem_puts(BIO *h, const char *str); +static int mem_gets(BIO *h, char *str, int size); +static long mem_ctrl(BIO *h, int cmd, long arg1, void *arg2); +static int mem_new(BIO *h); +static int mem_free(BIO *data); +static BIO_METHOD mem_method= + { + BIO_TYPE_MEM, + "memory buffer", + mem_write, + mem_read, + mem_puts, + mem_gets, + mem_ctrl, + mem_new, + mem_free, + NULL, + }; + +/* bio->num is used to hold the value to return on 'empty', if it is + * 0, should_retry is not set */ + +BIO_METHOD *BIO_s_mem(void) + { + return(&mem_method); + } + +BIO *BIO_new_mem_buf(void *buf, int len) +{ + BIO *ret; + BUF_MEM *b; + if (!buf) { + BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER); + return NULL; + } + if(len == -1) len = strlen(buf); + if(!(ret = BIO_new(BIO_s_mem())) ) return NULL; + b = (BUF_MEM *)ret->ptr; + b->data = buf; + b->length = len; + b->max = len; + ret->flags |= BIO_FLAGS_MEM_RDONLY; + /* Since this is static data retrying wont help */ + ret->num = 0; + return ret; +} + +static int mem_new(BIO *bi) + { + BUF_MEM *b; + + if ((b=BUF_MEM_new()) == NULL) + return(0); + bi->shutdown=1; + bi->init=1; + bi->num= -1; + bi->ptr=(char *)b; + return(1); + } + +static int mem_free(BIO *a) + { + if (a == NULL) return(0); + if (a->shutdown) + { + if ((a->init) && (a->ptr != NULL)) + { + BUF_MEM *b; + b = (BUF_MEM *)a->ptr; + if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL; + BUF_MEM_free(b); + a->ptr=NULL; + } + } + return(1); + } + +static int mem_read(BIO *b, char *out, int outl) + { + int ret= -1; + BUF_MEM *bm; + int i; + char *from,*to; + + bm=(BUF_MEM *)b->ptr; + BIO_clear_retry_flags(b); + ret=(outl > bm->length)?bm->length:outl; + if ((out != NULL) && (ret > 0)) { + memcpy(out,bm->data,ret); + bm->length-=ret; + /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */ + if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret; + else { + from=(char *)&(bm->data[ret]); + to=(char *)&(bm->data[0]); + for (i=0; i<bm->length; i++) + to[i]=from[i]; + } + } else if (bm->length == 0) + { + ret = b->num; + if (ret != 0) + BIO_set_retry_read(b); + } + return(ret); + } + +static int mem_write(BIO *b, const char *in, int inl) + { + int ret= -1; + int blen; + BUF_MEM *bm; + + bm=(BUF_MEM *)b->ptr; + if (in == NULL) + { + BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER); + goto end; + } + + if(b->flags & BIO_FLAGS_MEM_RDONLY) { + BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO); + goto end; + } + + BIO_clear_retry_flags(b); + blen=bm->length; + if (BUF_MEM_grow_clean(bm,blen+inl) != (blen+inl)) + goto end; + memcpy(&(bm->data[blen]),in,inl); + ret=inl; +end: + return(ret); + } + +static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) + { + long ret=1; + char **pptr; + + BUF_MEM *bm=(BUF_MEM *)b->ptr; + + switch (cmd) + { + case BIO_CTRL_RESET: + if (bm->data != NULL) + { + /* For read only case reset to the start again */ + if(b->flags & BIO_FLAGS_MEM_RDONLY) + { + bm->data -= bm->max - bm->length; + bm->length = bm->max; + } + else + { + memset(bm->data,0,bm->max); + bm->length=0; + } + } + break; + case BIO_CTRL_EOF: + ret=(long)(bm->length == 0); + break; + case BIO_C_SET_BUF_MEM_EOF_RETURN: + b->num=(int)num; + break; + case BIO_CTRL_INFO: + ret=(long)bm->length; + if (ptr != NULL) + { + pptr=(char **)ptr; + *pptr=(char *)&(bm->data[0]); + } + break; + case BIO_C_SET_BUF_MEM: + mem_free(b); + b->shutdown=(int)num; + b->ptr=ptr; + break; + case BIO_C_GET_BUF_MEM_PTR: + if (ptr != NULL) + { + pptr=(char **)ptr; + *pptr=(char *)bm; + } + break; + case BIO_CTRL_GET_CLOSE: + ret=(long)b->shutdown; + break; + case BIO_CTRL_SET_CLOSE: + b->shutdown=(int)num; + break; + + case BIO_CTRL_WPENDING: + ret=0L; + break; + case BIO_CTRL_PENDING: + ret=(long)bm->length; + break; + case BIO_CTRL_DUP: + case BIO_CTRL_FLUSH: + ret=1; + break; + case BIO_CTRL_PUSH: + case BIO_CTRL_POP: + default: + ret=0; + break; + } + return(ret); + } + +static int mem_gets(BIO *bp, char *buf, int size) + { + int i,j; + int ret= -1; + char *p; + BUF_MEM *bm=(BUF_MEM *)bp->ptr; + + BIO_clear_retry_flags(bp); + j=bm->length; + if (j <= 0) + { + *buf='\0'; + return 0; + } + p=bm->data; + for (i=0; i<j; i++) + { + if (p[i] == '\n') break; + } + if (i == j) + { + BIO_set_retry_read(bp); + /* return(-1); change the semantics 0.6.6a */ + } + else + i++; + /* i is the max to copy */ + if ((size-1) < i) i=size-1; + i=mem_read(bp,buf,i); + if (i > 0) buf[i]='\0'; + ret=i; + return(ret); + } + +static int mem_puts(BIO *bp, const char *str) + { + int n,ret; + + n=strlen(str); + ret=mem_write(bp,str,n); + /* memory semantics is that it will always work */ + return(ret); + } + |