/* crypto/asn1/t_x509.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/bn.h>
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
#include <openssl/dsa.h>
#endif
#ifndef OPENSSL_NO_EC
#include <openssl/ec.h>
#endif
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "asn1_locl.h"

#ifndef OPENSSL_NO_FP_API
int X509_print_fp(FILE *fp, X509 *x)
	{
	return X509_print_ex_fp(fp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
	}

int X509_print_ex_fp(FILE *fp, X509 *x, unsigned long nmflag, unsigned long cflag)
        {
        BIO *b;
        int ret;

        if ((b=BIO_new(BIO_s_file())) == NULL)
		{
		X509err(X509_F_X509_PRINT_EX_FP,ERR_R_BUF_LIB);
                return(0);
		}
        BIO_set_fp(b,fp,BIO_NOCLOSE);
        ret=X509_print_ex(b, x, nmflag, cflag);
        BIO_free(b);
        return(ret);
        }
#endif

int X509_print(BIO *bp, X509 *x)
{
	return X509_print_ex(bp, x, XN_FLAG_COMPAT, X509_FLAG_COMPAT);
}

int X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags, unsigned long cflag)
	{
	long l;
	int ret=0,i;
	char *m=NULL,mlch = ' ';
	int nmindent = 0;
	X509_CINF *ci;
	ASN1_INTEGER *bs;
	EVP_PKEY *pkey=NULL;
	const char *neg;

	if((nmflags & XN_FLAG_SEP_MASK) == XN_FLAG_SEP_MULTILINE) {
			mlch = '\n';
			nmindent = 12;
	}

	if(nmflags == X509_FLAG_COMPAT)
		nmindent = 16;

	ci=x->cert_info;
	if(!(cflag & X509_FLAG_NO_HEADER))
		{
		if (BIO_write(bp,"Certificate:\n",13) <= 0) goto err;
		if (BIO_write(bp,"    Data:\n",10) <= 0) goto err;
		}
	if(!(cflag & X509_FLAG_NO_VERSION))
		{
		l=X509_get_version(x);
		if (BIO_printf(bp,"%8sVersion: %lu (0x%lx)\n","",l+1,l) <= 0) goto err;
		}
	if(!(cflag & X509_FLAG_NO_SERIAL))
		{

		if (BIO_write(bp,"        Serial Number:",22) <= 0) goto err;

		bs=X509_get_serialNumber(x);
		if (bs->length <= (int)sizeof(long))
			{
			l=ASN1_INTEGER_get(bs);
			if (bs->type == V_ASN1_NEG_INTEGER)
				{
				l= -l;
				neg="-";
				}
			else
				neg="";
			if (BIO_printf(bp," %s%lu (%s0x%lx)\n",neg,l,neg,l) <= 0)
				goto err;
			}
		else
			{
			neg=(bs->type == V_ASN1_NEG_INTEGER)?" (Negative)":"";
			if (BIO_printf(bp,"\n%12s%s","",neg) <= 0) goto err;

			for (i=0; i<bs->length; i++)
				{
				if (BIO_printf(bp,"%02x%c",bs->data[i],
					((i+1 == bs->length)?'\n':':')) <= 0)
					goto err;
				}
			}

		}

	if(!(cflag & X509_FLAG_NO_SIGNAME))
		{
		if(X509_signature_print(bp, x->sig_alg, NULL) <= 0)
			goto err;
#if 0
		if (BIO_printf(bp,"%8sSignature Algorithm: ","") <= 0) 
			goto err;
		if (i2a_ASN1_OBJECT(bp, ci->signature->algorithm) <= 0)
			goto err;
		if (BIO_puts(bp, "\n") <= 0)
			goto err;
#endif
		}

	if(!(cflag & X509_FLAG_NO_ISSUER))
		{
		if (BIO_printf(bp,"        Issuer:%c",mlch) <= 0) goto err;
		if (X509_NAME_print_ex(bp,X509_get_issuer_name(x),nmindent, nmflags) < 0) goto err;
		if (BIO_write(bp,"\n",1) <= 0) goto err;
		}
	if(!(cflag & X509_FLAG_NO_VALIDITY))
		{
		if (BIO_write(bp,"        Validity\n",17) <= 0) goto err;
		if (BIO_write(bp,"            Not Before: ",24) <= 0) goto err;
		if (!ASN1_TIME_print(bp,X509_get_notBefore(x))) goto err;
		if (BIO_write(bp,"\n            Not After : ",25) <= 0) goto err;
		if (!ASN1_TIME_print(bp,X509_get_notAfter(x))) goto err;
		if (BIO_write(bp,"\n",1) <= 0) goto err;
		}
	if(!(cflag & X509_FLAG_NO_SUBJECT))
		{
		if (BIO_printf(bp,"        Subject:%c",mlch) <= 0) goto err;
		if (X509_NAME_print_ex(bp,X509_get_subject_name(x),nmindent, nmflags) < 0) goto err;
		if (BIO_write(bp,"\n",1) <= 0) goto err;
		}
	if(!(cflag & X509_FLAG_NO_PUBKEY))
		{
		if (BIO_write(bp,"        Subject Public Key Info:\n",33) <= 0)
			goto err;
		if (BIO_printf(bp,"%12sPublic Key Algorithm: ","") <= 0)
			goto err;
		if (i2a_ASN1_OBJECT(bp, ci->key->algor->algorithm) <= 0)
			goto err;
		if (BIO_puts(bp, "\n") <= 0)
			goto err;

		pkey=X509_get_pubkey(x);
		if (pkey == NULL)
			{
			BIO_printf(bp,"%12sUnable to load Public Key\n","");
			ERR_print_errors(bp);
			}
		else
			{
			EVP_PKEY_print_public(bp, pkey, 16, NULL);
			EVP_PKEY_free(pkey);
			}
		}

	if (!(cflag & X509_FLAG_NO_EXTENSIONS))
		X509V3_extensions_print(bp, "X509v3 extensions",
					ci->extensions, cflag, 8);

	if(!(cflag & X509_FLAG_NO_SIGDUMP))
		{
		if(X509_signature_print(bp, x->sig_alg, x->signature) <= 0) goto err;
		}
	if(!(cflag & X509_FLAG_NO_AUX))
		{
		if (!X509_CERT_AUX_print(bp, x->aux, 0)) goto err;
		}
	ret=1;
err:
	if (m != NULL) OPENSSL_free(m);
	return(ret);
	}

int X509_ocspid_print (BIO *bp, X509 *x)
	{
	unsigned char *der=NULL ;
	unsigned char *dertmp;
	int derlen;
	int i;
	unsigned char SHA1md[SHA_DIGEST_LENGTH];

	/* display the hash of the subject as it would appear
	   in OCSP requests */
	if (BIO_printf(bp,"        Subject OCSP hash: ") <= 0)
		goto err;
	derlen = i2d_X509_NAME(x->cert_info->subject, NULL);
	if ((der = dertmp = (unsigned char *)OPENSSL_malloc (derlen)) == NULL)
		goto err;
	i2d_X509_NAME(x->cert_info->subject, &dertmp);

	if (!EVP_Digest(der, derlen, SHA1md, NULL, EVP_sha1(), NULL))
		goto err;
	for (i=0; i < SHA_DIGEST_LENGTH; i++)
		{
		if (BIO_printf(bp,"%02X",SHA1md[i]) <= 0) goto err;
		}
	OPENSSL_free (der);
	der=NULL;

	/* display the hash of the public key as it would appear
	   in OCSP requests */
	if (BIO_printf(bp,"\n        Public key OCSP hash: ") <= 0)
		goto err;

	if (!EVP_Digest(x->cert_info->key->public_key->data,
			x->cert_info->key->public_key->length,
			SHA1md, NULL, EVP_sha1(), NULL))
		goto err;
	for (i=0; i < SHA_DIGEST_LENGTH; i++)
		{
		if (BIO_printf(bp,"%02X",SHA1md[i]) <= 0)
			goto err;
		}
	BIO_printf(bp,"\n");

	return (1);
err:
	if (der != NULL) OPENSSL_free(der);
	return(0);
	}

int X509_signature_dump(BIO *bp, const ASN1_STRING *sig, int indent)
{
	const unsigned char *s;
	int i, n;

	n=sig->length;
	s=sig->data;
	for (i=0; i<n; i++)
		{
		if ((i%18) == 0)
			{
			if (BIO_write(bp,"\n",1) <= 0) return 0;
			if (BIO_indent(bp, indent, indent) <= 0) return 0;
			}
			if (BIO_printf(bp,"%02x%s",s[i],
				((i+1) == n)?"":":") <= 0) return 0;
		}
	if (BIO_write(bp,"\n",1) != 1) return 0;

	return 1;
}

int X509_signature_print(BIO *bp, X509_ALGOR *sigalg, ASN1_STRING *sig)
{
	int sig_nid;
	if (BIO_puts(bp,"    Signature Algorithm: ") <= 0) return 0;
	if (i2a_ASN1_OBJECT(bp, sigalg->algorithm) <= 0) return 0;

	sig_nid = OBJ_obj2nid(sigalg->algorithm);
	if (sig_nid != NID_undef)
		{
		int pkey_nid, dig_nid;
		const EVP_PKEY_ASN1_METHOD *ameth;
		if (OBJ_find_sigid_algs(sig_nid, &dig_nid, &pkey_nid))
			{
			ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
			if (ameth && ameth->sig_print)
				return ameth->sig_print(bp, sigalg, sig, 9, 0);
			}
		}
	if (sig)
		return X509_signature_dump(bp, sig, 9);
	else if (BIO_puts(bp, "\n") <= 0)
		return 0;
	return 1;
}

int ASN1_STRING_print(BIO *bp, const ASN1_STRING *v)
	{
	int i,n;
	char buf[80];
	const char *p;

	if (v == NULL) return(0);
	n=0;
	p=(const char *)v->data;
	for (i=0; i<v->length; i++)
		{
		if ((p[i] > '~') || ((p[i] < ' ') &&
			(p[i] != '\n') && (p[i] != '\r')))
			buf[n]='.';
		else
			buf[n]=p[i];
		n++;
		if (n >= 80)
			{
			if (BIO_write(bp,buf,n) <= 0)
				return(0);
			n=0;
			}
		}
	if (n > 0)
		if (BIO_write(bp,buf,n) <= 0)
			return(0);
	return(1);
	}

int ASN1_TIME_print(BIO *bp, const ASN1_TIME *tm)
{
	if(tm->type == V_ASN1_UTCTIME) return ASN1_UTCTIME_print(bp, tm);
	if(tm->type == V_ASN1_GENERALIZEDTIME)
				return ASN1_GENERALIZEDTIME_print(bp, tm);
	BIO_write(bp,"Bad time value",14);
	return(0);
}

static const char *mon[12]=
    {
    "Jan","Feb","Mar","Apr","May","Jun",
    "Jul","Aug","Sep","Oct","Nov","Dec"
    };

int ASN1_GENERALIZEDTIME_print(BIO *bp, const ASN1_GENERALIZEDTIME *tm)
	{
	char *v;
	int gmt=0;
	int i;
	int y=0,M=0,d=0,h=0,m=0,s=0;
	char *f = NULL;
	int f_len = 0;

	i=tm->length;
	v=(char *)tm->data;

	if (i < 12) goto err;
	if (v[i-1] == 'Z') gmt=1;
	for (i=0; i<12; i++)
		if ((v[i] > '9') || (v[i] < '0')) goto err;
	y= (v[0]-'0')*1000+(v[1]-'0')*100 + (v[2]-'0')*10+(v[3]-'0');
	M= (v[4]-'0')*10+(v[5]-'0');
	if ((M > 12) || (M < 1)) goto err;
	d= (v[6]-'0')*10+(v[7]-'0');
	h= (v[8]-'0')*10+(v[9]-'0');
	m=  (v[10]-'0')*10+(v[11]-'0');
	if (tm->length >= 14 &&
	    (v[12] >= '0') && (v[12] <= '9') &&
	    (v[13] >= '0') && (v[13] <= '9'))
		{
		s=  (v[12]-'0')*10+(v[13]-'0');
		/* Check for fractions of seconds. */
		if (tm->length >= 15 && v[14] == '.')
			{
			int l = tm->length;
			f = &v[14];	/* The decimal point. */
			f_len = 1;
			while (14 + f_len < l && f[f_len] >= '0' && f[f_len] <= '9')
				++f_len;
			}
		}

	if (BIO_printf(bp,"%s %2d %02d:%02d:%02d%.*s %d%s",
		mon[M-1],d,h,m,s,f_len,f,y,(gmt)?" GMT":"") <= 0)
		return(0);
	else
		return(1);
err:
	BIO_write(bp,"Bad time value",14);
	return(0);
	}

int ASN1_UTCTIME_print(BIO *bp, const ASN1_UTCTIME *tm)
	{
	const char *v;
	int gmt=0;
	int i;
	int y=0,M=0,d=0,h=0,m=0,s=0;

	i=tm->length;
	v=(const char *)tm->data;

	if (i < 10) goto err;
	if (v[i-1] == 'Z') gmt=1;
	for (i=0; i<10; i++)
		if ((v[i] > '9') || (v[i] < '0')) goto err;
	y= (v[0]-'0')*10+(v[1]-'0');
	if (y < 50) y+=100;
	M= (v[2]-'0')*10+(v[3]-'0');
	if ((M > 12) || (M < 1)) goto err;
	d= (v[4]-'0')*10+(v[5]-'0');
	h= (v[6]-'0')*10+(v[7]-'0');
	m=  (v[8]-'0')*10+(v[9]-'0');
	if (tm->length >=12 &&
	    (v[10] >= '0') && (v[10] <= '9') &&
	    (v[11] >= '0') && (v[11] <= '9'))
		s=  (v[10]-'0')*10+(v[11]-'0');

	if (BIO_printf(bp,"%s %2d %02d:%02d:%02d %d%s",
		mon[M-1],d,h,m,s,y+1900,(gmt)?" GMT":"") <= 0)
		return(0);
	else
		return(1);
err:
	BIO_write(bp,"Bad time value",14);
	return(0);
	}

int X509_NAME_print(BIO *bp, X509_NAME *name, int obase)
	{
	char *s,*c,*b;
	int ret=0,l,i;

	l=80-2-obase;

	b=X509_NAME_oneline(name,NULL,0);
	if (!b)
		return 0;
	if (!*b)
		{
		OPENSSL_free(b);
		return 1;
		}
	s=b+1; /* skip the first slash */

	c=s;
	for (;;)
		{
#ifndef CHARSET_EBCDIC
		if (	((*s == '/') &&
				((s[1] >= 'A') && (s[1] <= 'Z') && (
					(s[2] == '=') ||
					((s[2] >= 'A') && (s[2] <= 'Z') &&
					(s[3] == '='))
				 ))) ||
			(*s == '\0'))
#else
		if (	((*s == '/') &&
				(isupper(s[1]) && (
					(s[2] == '=') ||
					(isupper(s[2]) &&
					(s[3] == '='))
				 ))) ||
			(*s == '\0'))
#endif
			{
			i=s-c;
			if (BIO_write(bp,c,i) != i) goto err;
			c=s+1;	/* skip following slash */
			if (*s != '\0')
				{
				if (BIO_write(bp,", ",2) != 2) goto err;
				}
			l--;
			}
		if (*s == '\0') break;
		s++;
		l--;
		}
	
	ret=1;
	if (0)
		{
err:
		X509err(X509_F_X509_NAME_PRINT,ERR_R_BUF_LIB);
		}
	OPENSSL_free(b);
	return(ret);
	}