254 lines
6.7 KiB
C
254 lines
6.7 KiB
C
/* crypto/x509/v3_x509.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include "stack.h"
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#include "cryptlib.h"
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#include "bio.h"
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#include "asn1.h"
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#include "objects.h"
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#include "x509.h"
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#if 0
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static int i2a_key_usage(BIO *bp, X509 *x);
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static int a2i_key_usage(X509 *x, char *str, int len);
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#endif
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int X509v3_get_key_usage(X509 *x);
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int X509v3_set_key_usage(X509 *x,unsigned int use);
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int i2a_X509v3_key_usage(BIO *bp, unsigned int use);
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unsigned int a2i_X509v3_key_usage(char *p);
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#define STD_X509_EXT_NUM 9
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#if 0
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static X509_OBJECTS std_x509_ext[STD_X509_EXT_NUM]={
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{NID_subject_key_identifier, NULL,NULL},
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{NID_key_usage, a2i_key_usage,i2a_key_usage}, /**/
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{NID_private_key_usage_period, NULL,NULL},
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{NID_subject_alt_name, NULL,NULL},
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{NID_issuer_alt_name, NULL,NULL},
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{NID_basic_constraints, NULL,NULL},
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{NID_crl_number, NULL,NULL},
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{NID_certificate_policies, NULL,NULL},
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{NID_authority_key_identifier, NULL,NULL},
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};
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#endif
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int X509v3_add_standard_extensions()
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{
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#if 0
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for (i=0; i<STD_X509_EXT_NUM; i++)
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if (!X509v3_add_extension(&(std_x509_ext[i])))
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return(0);
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#endif
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return(1);
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}
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int X509v3_get_key_usage(x)
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X509 *x;
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{
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X509_EXTENSION *ext;
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ASN1_STRING *st;
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char *p;
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int i;
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i=X509_get_ext_by_NID(x,NID_key_usage,-1);
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if (i < 0) return(X509v3_KU_UNDEF);
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ext=X509_get_ext(x,i);
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st=X509v3_unpack_string(NULL,V_ASN1_BIT_STRING,
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X509_EXTENSION_get_data(X509_get_ext(x,i)));
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p=(char *)ASN1_STRING_data(st);
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if (ASN1_STRING_length(st) == 1)
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i=p[0];
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else if (ASN1_STRING_length(st) == 2)
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i=p[0]|(p[1]<<8);
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else
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i=0;
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return(i);
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}
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static struct
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{
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char *name;
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unsigned int value;
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} key_usage_data[] ={
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{"digitalSignature", X509v3_KU_DIGITAL_SIGNATURE},
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{"nonRepudiation", X509v3_KU_NON_REPUDIATION},
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{"keyEncipherment", X509v3_KU_KEY_ENCIPHERMENT},
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{"dataEncipherment", X509v3_KU_DATA_ENCIPHERMENT},
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{"keyAgreement", X509v3_KU_KEY_AGREEMENT},
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{"keyCertSign", X509v3_KU_KEY_CERT_SIGN},
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{"cRLSign", X509v3_KU_CRL_SIGN},
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{"encipherOnly", X509v3_KU_ENCIPHER_ONLY},
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{"decipherOnly", X509v3_KU_DECIPHER_ONLY},
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{NULL,0},
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};
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#if 0
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static int a2i_key_usage(x,str,len)
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X509 *x;
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char *str;
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int len;
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{
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return(X509v3_set_key_usage(x,a2i_X509v3_key_usage(str)));
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}
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static int i2a_key_usage(bp,x)
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BIO *bp;
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X509 *x;
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{
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return(i2a_X509v3_key_usage(bp,X509v3_get_key_usage(x)));
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}
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#endif
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int i2a_X509v3_key_usage(bp,use)
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BIO *bp;
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unsigned int use;
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{
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int i=0,first=1;
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for (;;)
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{
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if (use | key_usage_data[i].value)
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{
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BIO_printf(bp,"%s%s",((first)?"":" "),
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key_usage_data[i].name);
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first=0;
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}
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break;
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}
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return(1);
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}
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unsigned int a2i_X509v3_key_usage(p)
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char *p;
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{
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unsigned int ret=0;
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char *q,*s;
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int i,n;
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q=p;
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for (;;)
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{
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while ((*q != '\0') && isalnum(*q))
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q++;
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if (*q == '\0') break;
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s=q++;
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while (isalnum(*q))
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q++;
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n=q-s;
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i=0;
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for (;;)
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{
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if (strncmp(key_usage_data[i].name,s,n) == 0)
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{
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ret|=key_usage_data[i].value;
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break;
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}
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i++;
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if (key_usage_data[i].name == NULL)
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return(X509v3_KU_UNDEF);
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}
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}
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return(ret);
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}
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int X509v3_set_key_usage(x,use)
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X509 *x;
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unsigned int use;
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{
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ASN1_OCTET_STRING *os;
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X509_EXTENSION *ext;
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int i;
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unsigned char data[4];
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i=X509_get_ext_by_NID(x,NID_key_usage,-1);
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if (i < 0)
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{
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i=X509_get_ext_count(x)+1;
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if ((ext=X509_EXTENSION_new()) == NULL) return(0);
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if (!X509_add_ext(x,ext,i))
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{
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X509_EXTENSION_free(ext);
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return(0);
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}
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}
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else
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ext=X509_get_ext(x,i);
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/* fill in 'ext' */
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os=X509_EXTENSION_get_data(ext);
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i=0;
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if (use > 0)
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{
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i=1;
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data[0]=use&0xff;
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}
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if (use > 0xff)
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{
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i=2;
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data[1]=(use>>8)&0xff;
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}
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return((X509v3_pack_string(&os,V_ASN1_BIT_STRING,data,i) == NULL)?0:1);
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}
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