diff options
Diffstat (limited to 'crypto/asn1/a_bitstr.c')
| -rw-r--r-- | crypto/asn1/a_bitstr.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/crypto/asn1/a_bitstr.c b/crypto/asn1/a_bitstr.c new file mode 100644 index 0000000000..eb99ebca2f --- /dev/null +++ b/crypto/asn1/a_bitstr.c @@ -0,0 +1,158 @@ +/* crypto/asn1/a_bitstr.c */ +/* Copyright (C) 1995-1997 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 "asn1.h" + +/* ASN1err(ASN1_F_ASN1_STRING_NEW,ASN1_R_STRING_TOO_SHORT); + * ASN1err(ASN1_F_D2I_ASN1_BIT_STRING,ASN1_R_EXPECTING_A_BIT_STRING); + */ + +int i2d_ASN1_BIT_STRING(a,pp) +ASN1_BIT_STRING *a; +unsigned char **pp; + { + int ret,j,r,bits; + unsigned char *p,*d; + + if (a == NULL) return(0); + + /* our bit strings are always a multiple of 8 :-) */ + bits=0; + ret=1+a->length; + r=ASN1_object_size(0,ret,V_ASN1_BIT_STRING); + if (pp == NULL) return(r); + p= *pp; + + ASN1_put_object(&p,0,ret,V_ASN1_BIT_STRING,V_ASN1_UNIVERSAL); + if (bits == 0) + j=0; + else j=8-bits; + *(p++)=(unsigned char)j; + d=a->data; + memcpy(p,d,a->length); + p+=a->length; + if (a->length > 0) p[-1]&=(0xff<<j); + *pp=p; + return(r); + } + +ASN1_BIT_STRING *d2i_ASN1_BIT_STRING(a, pp, length) +ASN1_BIT_STRING **a; +unsigned char **pp; +long length; + { + ASN1_BIT_STRING *ret=NULL; + unsigned char *p,*s; + long len; + int inf,tag,xclass; + int i; + + if ((a == NULL) || ((*a) == NULL)) + { + if ((ret=ASN1_BIT_STRING_new()) == NULL) return(NULL); + } + else + ret=(*a); + + p= *pp; + inf=ASN1_get_object(&p,&len,&tag,&xclass,length); + if (inf & 0x80) + { + i=ASN1_R_BAD_OBJECT_HEADER; + goto err; + } + + if (tag != V_ASN1_BIT_STRING) + { + i=ASN1_R_EXPECTING_A_BIT_STRING; + goto err; + } + if (len < 1) { i=ASN1_R_STRING_TOO_SHORT; goto err; } + + i= *(p++); + if (len-- > 1) /* using one because of the bits left byte */ + { + s=(unsigned char *)Malloc((int)len); + if (s == NULL) + { + i=ERR_R_MALLOC_FAILURE; + goto err; + } + memcpy(s,p,(int)len); + s[len-1]&=(0xff<<i); + p+=len; + } + else + s=NULL; + + ret->length=(int)len; + if (ret->data != NULL) Free((char *)ret->data); + ret->data=s; + ret->type=V_ASN1_BIT_STRING; + if (a != NULL) (*a)=ret; + *pp=p; + return(ret); +err: + ASN1err(ASN1_F_D2I_ASN1_BIT_STRING,i); + if ((ret != NULL) && ((a == NULL) || (*a != ret))) + ASN1_BIT_STRING_free(ret); + return(NULL); + } + |