diff options
Diffstat (limited to 'openssl/crypto/asn1/a_d2i_fp.c')
| -rw-r--r-- | openssl/crypto/asn1/a_d2i_fp.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/a_d2i_fp.c b/openssl/crypto/asn1/a_d2i_fp.c new file mode 100644 index 000000000..ece40bc4c --- /dev/null +++ b/openssl/crypto/asn1/a_d2i_fp.c @@ -0,0 +1,260 @@ +/* crypto/asn1/a_d2i_fp.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 "cryptlib.h" +#include <openssl/buffer.h> +#include <openssl/asn1_mac.h> + +static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb); + +#ifndef NO_OLD_ASN1 +#ifndef OPENSSL_NO_FP_API + +void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x) + { + BIO *b; + void *ret; + + if ((b=BIO_new(BIO_s_file())) == NULL) + { + ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB); + return(NULL); + } + BIO_set_fp(b,in,BIO_NOCLOSE); + ret=ASN1_d2i_bio(xnew,d2i,b,x); + BIO_free(b); + return(ret); + } +#endif + +void *ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x) + { + BUF_MEM *b = NULL; + const unsigned char *p; + void *ret=NULL; + int len; + + len = asn1_d2i_read_bio(in, &b); + if(len < 0) goto err; + + p=(unsigned char *)b->data; + ret=d2i(x,&p,len); +err: + if (b != NULL) BUF_MEM_free(b); + return(ret); + } + +#endif + +void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x) + { + BUF_MEM *b = NULL; + const unsigned char *p; + void *ret=NULL; + int len; + + len = asn1_d2i_read_bio(in, &b); + if(len < 0) goto err; + + p=(const unsigned char *)b->data; + ret=ASN1_item_d2i(x,&p,len, it); +err: + if (b != NULL) BUF_MEM_free(b); + return(ret); + } + +#ifndef OPENSSL_NO_FP_API +void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x) + { + BIO *b; + char *ret; + + if ((b=BIO_new(BIO_s_file())) == NULL) + { + ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB); + return(NULL); + } + BIO_set_fp(b,in,BIO_NOCLOSE); + ret=ASN1_item_d2i_bio(it,b,x); + BIO_free(b); + return(ret); + } +#endif + +#define HEADER_SIZE 8 +static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb) + { + BUF_MEM *b; + unsigned char *p; + int i; + int ret=-1; + ASN1_const_CTX c; + int want=HEADER_SIZE; + int eos=0; +#if defined(__GNUC__) && defined(__ia64) + /* pathetic compiler bug in all known versions as of Nov. 2002 */ + long off=0; +#else + int off=0; +#endif + int len=0; + + b=BUF_MEM_new(); + if (b == NULL) + { + ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); + return -1; + } + + ERR_clear_error(); + for (;;) + { + if (want >= (len-off)) + { + want-=(len-off); + + if (!BUF_MEM_grow_clean(b,len+want)) + { + ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); + goto err; + } + i=BIO_read(in,&(b->data[len]),want); + if ((i < 0) && ((len-off) == 0)) + { + ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOUGH_DATA); + goto err; + } + if (i > 0) + len+=i; + } + /* else data already loaded */ + + p=(unsigned char *)&(b->data[off]); + c.p=p; + c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass), + len-off); + if (c.inf & 0x80) + { + unsigned long e; + + e=ERR_GET_REASON(ERR_peek_error()); + if (e != ASN1_R_TOO_LONG) + goto err; + else + ERR_clear_error(); /* clear error */ + } + i=c.p-p;/* header length */ + off+=i; /* end of data */ + + if (c.inf & 1) + { + /* no data body so go round again */ + eos++; + want=HEADER_SIZE; + } + else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) + { + /* eos value, so go back and read another header */ + eos--; + if (eos <= 0) + break; + else + want=HEADER_SIZE; + } + else + { + /* suck in c.slen bytes of data */ + want=(int)c.slen; + if (want > (len-off)) + { + want-=(len-off); + if (!BUF_MEM_grow_clean(b,len+want)) + { + ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE); + goto err; + } + while (want > 0) + { + i=BIO_read(in,&(b->data[len]),want); + if (i <= 0) + { + ASN1err(ASN1_F_ASN1_D2I_READ_BIO, + ASN1_R_NOT_ENOUGH_DATA); + goto err; + } + len+=i; + want -= i; + } + } + off+=(int)c.slen; + if (eos <= 0) + { + break; + } + else + want=HEADER_SIZE; + } + } + + *pb = b; + return off; +err: + if (b != NULL) BUF_MEM_free(b); + return(ret); + } |