sl@0: /* crypto/x509/x509_cmp.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <ctype.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/asn1.h>
sl@0: #include <openssl/objects.h>
sl@0: #include <openssl/x509.h>
sl@0: #include <openssl/x509v3.h>
sl@0: 
sl@0: EXPORT_C int X509_issuer_and_serial_cmp(const X509 *a, const X509 *b)
sl@0: 	{
sl@0: 	int i;
sl@0: 	X509_CINF *ai,*bi;
sl@0: 
sl@0: 	ai=a->cert_info;
sl@0: 	bi=b->cert_info;
sl@0: 	i=M_ASN1_INTEGER_cmp(ai->serialNumber,bi->serialNumber);
sl@0: 	if (i) return(i);
sl@0: 	return(X509_NAME_cmp(ai->issuer,bi->issuer));
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_MD5
sl@0: EXPORT_C unsigned long X509_issuer_and_serial_hash(X509 *a)
sl@0: 	{
sl@0: 	unsigned long ret=0;
sl@0: 	EVP_MD_CTX ctx;
sl@0: 	unsigned char md[16];
sl@0: 	char *f;
sl@0: 
sl@0: 	EVP_MD_CTX_init(&ctx);
sl@0: 	f=X509_NAME_oneline(a->cert_info->issuer,NULL,0);
sl@0: 	ret=strlen(f);
sl@0: 	EVP_DigestInit_ex(&ctx, EVP_md5(), NULL);
sl@0: 	EVP_DigestUpdate(&ctx,(unsigned char *)f,ret);
sl@0: 	OPENSSL_free(f);
sl@0: 	EVP_DigestUpdate(&ctx,(unsigned char *)a->cert_info->serialNumber->data,
sl@0: 		(unsigned long)a->cert_info->serialNumber->length);
sl@0: 	EVP_DigestFinal_ex(&ctx,&(md[0]),NULL);
sl@0: 	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
sl@0: 		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
sl@0: 		)&0xffffffffL;
sl@0: 	EVP_MD_CTX_cleanup(&ctx);
sl@0: 	return(ret);
sl@0: 	}
sl@0: #endif
sl@0: 	
sl@0: EXPORT_C int X509_issuer_name_cmp(const X509 *a, const X509 *b)
sl@0: 	{
sl@0: 	return(X509_NAME_cmp(a->cert_info->issuer,b->cert_info->issuer));
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int X509_subject_name_cmp(const X509 *a, const X509 *b)
sl@0: 	{
sl@0: 	return(X509_NAME_cmp(a->cert_info->subject,b->cert_info->subject));
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
sl@0: 	{
sl@0: 	return(X509_NAME_cmp(a->crl->issuer,b->crl->issuer));
sl@0: 	}
sl@0: 
sl@0: EXPORT_C X509_NAME *X509_get_issuer_name(X509 *a)
sl@0: 	{
sl@0: 	return(a->cert_info->issuer);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C unsigned long X509_issuer_name_hash(X509 *x)
sl@0: 	{
sl@0: 	return(X509_NAME_hash(x->cert_info->issuer));
sl@0: 	}
sl@0: 
sl@0: EXPORT_C X509_NAME *X509_get_subject_name(X509 *a)
sl@0: 	{
sl@0: 	return(a->cert_info->subject);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C ASN1_INTEGER *X509_get_serialNumber(X509 *a)
sl@0: 	{
sl@0: 	return(a->cert_info->serialNumber);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C unsigned long X509_subject_name_hash(X509 *x)
sl@0: 	{
sl@0: 	return(X509_NAME_hash(x->cert_info->subject));
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_SHA
sl@0: /* Compare two certificates: they must be identical for
sl@0:  * this to work. NB: Although "cmp" operations are generally
sl@0:  * prototyped to take "const" arguments (eg. for use in
sl@0:  * STACKs), the way X509 handling is - these operations may
sl@0:  * involve ensuring the hashes are up-to-date and ensuring
sl@0:  * certain cert information is cached. So this is the point
sl@0:  * where the "depth-first" constification tree has to halt
sl@0:  * with an evil cast.
sl@0:  */
sl@0: EXPORT_C int X509_cmp(const X509 *a, const X509 *b)
sl@0: {
sl@0: 	/* ensure hash is valid */
sl@0: 	X509_check_purpose((X509 *)a, -1, 0);
sl@0: 	X509_check_purpose((X509 *)b, -1, 0);
sl@0: 
sl@0: 	return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
sl@0: }
sl@0: #endif
sl@0: 
sl@0: 
sl@0: /* Case insensitive string comparision */
sl@0: static int nocase_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
sl@0: {
sl@0: 	int i;
sl@0: 
sl@0: 	if (a->length != b->length)
sl@0: 		return (a->length - b->length);
sl@0: 
sl@0: 	for (i=0; i<a->length; i++)
sl@0: 	{
sl@0: 		int ca, cb;
sl@0: 
sl@0: 		ca = tolower(a->data[i]);
sl@0: 		cb = tolower(b->data[i]);
sl@0: 
sl@0: 		if (ca != cb)
sl@0: 			return(ca-cb);
sl@0: 	}
sl@0: 	return 0;
sl@0: }
sl@0: 
sl@0: /* Case insensitive string comparision with space normalization 
sl@0:  * Space normalization - ignore leading, trailing spaces, 
sl@0:  *       multiple spaces between characters are replaced by single space  
sl@0:  */
sl@0: static int nocase_spacenorm_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
sl@0: {
sl@0: 	unsigned char *pa = NULL, *pb = NULL;
sl@0: 	int la, lb;
sl@0: 	
sl@0: 	la = a->length;
sl@0: 	lb = b->length;
sl@0: 	pa = a->data;
sl@0: 	pb = b->data;
sl@0: 
sl@0: 	/* skip leading spaces */
sl@0: 	while (la > 0 && isspace(*pa))
sl@0: 	{
sl@0: 		la--;
sl@0: 		pa++;
sl@0: 	}
sl@0: 	while (lb > 0 && isspace(*pb))
sl@0: 	{
sl@0: 		lb--;
sl@0: 		pb++;
sl@0: 	}
sl@0: 
sl@0: 	/* skip trailing spaces */
sl@0: 	while (la > 0 && isspace(pa[la-1]))
sl@0: 		la--;
sl@0: 	while (lb > 0 && isspace(pb[lb-1]))
sl@0: 		lb--;
sl@0: 
sl@0: 	/* compare strings with space normalization */
sl@0: 	while (la > 0 && lb > 0)
sl@0: 	{
sl@0: 		int ca, cb;
sl@0: 
sl@0: 		/* compare character */
sl@0: 		ca = tolower(*pa);
sl@0: 		cb = tolower(*pb);
sl@0: 		if (ca != cb)
sl@0: 			return (ca - cb);
sl@0: 
sl@0: 		pa++; pb++;
sl@0: 		la--; lb--;
sl@0: 
sl@0: 		if (la <= 0 || lb <= 0)
sl@0: 			break;
sl@0: 
sl@0: 		/* is white space next character ? */
sl@0: 		if (isspace(*pa) && isspace(*pb))
sl@0: 		{
sl@0: 			/* skip remaining white spaces */
sl@0: 			while (la > 0 && isspace(*pa))
sl@0: 			{
sl@0: 				la--;
sl@0: 				pa++;
sl@0: 			}
sl@0: 			while (lb > 0 && isspace(*pb))
sl@0: 			{
sl@0: 				lb--;
sl@0: 				pb++;
sl@0: 			}
sl@0: 		}
sl@0: 	}
sl@0: 	if (la > 0 || lb > 0)
sl@0: 		return la - lb;
sl@0: 
sl@0: 	return 0;
sl@0: }
sl@0: 
sl@0: static int asn1_string_memcmp(ASN1_STRING *a, ASN1_STRING *b)
sl@0: 	{
sl@0: 	int j;
sl@0: 	j = a->length - b->length;
sl@0: 	if (j)
sl@0: 		return j;
sl@0: 	return memcmp(a->data, b->data, a->length);
sl@0: 	}
sl@0: 
sl@0: #define STR_TYPE_CMP (B_ASN1_PRINTABLESTRING|B_ASN1_T61STRING|B_ASN1_UTF8STRING)
sl@0: 
sl@0: EXPORT_C int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
sl@0: 	{
sl@0: 	int i,j;
sl@0: 	X509_NAME_ENTRY *na,*nb;
sl@0: 
sl@0: 	unsigned long nabit, nbbit;
sl@0: 
sl@0: 	j = sk_X509_NAME_ENTRY_num(a->entries)
sl@0: 		  - sk_X509_NAME_ENTRY_num(b->entries);
sl@0: 	if (j)
sl@0: 		return j;
sl@0: 	for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
sl@0: 		{
sl@0: 		na=sk_X509_NAME_ENTRY_value(a->entries,i);
sl@0: 		nb=sk_X509_NAME_ENTRY_value(b->entries,i);
sl@0: 		j=na->value->type-nb->value->type;
sl@0: 		if (j)
sl@0: 			{
sl@0: 			nabit = ASN1_tag2bit(na->value->type);
sl@0: 			nbbit = ASN1_tag2bit(nb->value->type);
sl@0: 			if (!(nabit & STR_TYPE_CMP) ||
sl@0: 				!(nbbit & STR_TYPE_CMP))
sl@0: 				return j;
sl@0: 			j = asn1_string_memcmp(na->value, nb->value);
sl@0: 			}
sl@0: 		else if (na->value->type == V_ASN1_PRINTABLESTRING)
sl@0: 			j=nocase_spacenorm_cmp(na->value, nb->value);
sl@0: 		else if (na->value->type == V_ASN1_IA5STRING
sl@0: 			&& OBJ_obj2nid(na->object) == NID_pkcs9_emailAddress)
sl@0: 			j=nocase_cmp(na->value, nb->value);
sl@0: 		else
sl@0: 			j = asn1_string_memcmp(na->value, nb->value);
sl@0: 		if (j) return(j);
sl@0: 		j=na->set-nb->set;
sl@0: 		if (j) return(j);
sl@0: 		}
sl@0: 
sl@0: 	/* We will check the object types after checking the values
sl@0: 	 * since the values will more often be different than the object
sl@0: 	 * types. */
sl@0: 	for (i=sk_X509_NAME_ENTRY_num(a->entries)-1; i>=0; i--)
sl@0: 		{
sl@0: 		na=sk_X509_NAME_ENTRY_value(a->entries,i);
sl@0: 		nb=sk_X509_NAME_ENTRY_value(b->entries,i);
sl@0: 		j=OBJ_cmp(na->object,nb->object);
sl@0: 		if (j) return(j);
sl@0: 		}
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_MD5
sl@0: /* I now DER encode the name and hash it.  Since I cache the DER encoding,
sl@0:  * this is reasonably efficient. */
sl@0: EXPORT_C unsigned long X509_NAME_hash(X509_NAME *x)
sl@0: 	{
sl@0: 	unsigned long ret=0;
sl@0: 	unsigned char md[16];
sl@0: 
sl@0: 	/* Make sure X509_NAME structure contains valid cached encoding */
sl@0: 	i2d_X509_NAME(x,NULL);
sl@0: 	EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL);
sl@0: 
sl@0: 	ret=(	((unsigned long)md[0]     )|((unsigned long)md[1]<<8L)|
sl@0: 		((unsigned long)md[2]<<16L)|((unsigned long)md[3]<<24L)
sl@0: 		)&0xffffffffL;
sl@0: 	return(ret);
sl@0: 	}
sl@0: #endif
sl@0: 
sl@0: /* Search a stack of X509 for a match */
sl@0: EXPORT_C X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
sl@0: 		ASN1_INTEGER *serial)
sl@0: 	{
sl@0: 	int i;
sl@0: 	X509_CINF cinf;
sl@0: 	X509 x,*x509=NULL;
sl@0: 
sl@0: 	if(!sk) return NULL;
sl@0: 
sl@0: 	x.cert_info= &cinf;
sl@0: 	cinf.serialNumber=serial;
sl@0: 	cinf.issuer=name;
sl@0: 
sl@0: 	for (i=0; i<sk_X509_num(sk); i++)
sl@0: 		{
sl@0: 		x509=sk_X509_value(sk,i);
sl@0: 		if (X509_issuer_and_serial_cmp(x509,&x) == 0)
sl@0: 			return(x509);
sl@0: 		}
sl@0: 	return(NULL);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
sl@0: 	{
sl@0: 	X509 *x509;
sl@0: 	int i;
sl@0: 
sl@0: 	for (i=0; i<sk_X509_num(sk); i++)
sl@0: 		{
sl@0: 		x509=sk_X509_value(sk,i);
sl@0: 		if (X509_NAME_cmp(X509_get_subject_name(x509),name) == 0)
sl@0: 			return(x509);
sl@0: 		}
sl@0: 	return(NULL);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C EVP_PKEY *X509_get_pubkey(X509 *x)
sl@0: 	{
sl@0: 	if ((x == NULL) || (x->cert_info == NULL))
sl@0: 		return(NULL);
sl@0: 	return(X509_PUBKEY_get(x->cert_info->key));
sl@0: 	}
sl@0: 
sl@0: EXPORT_C ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
sl@0: 	{
sl@0: 	if(!x) return NULL;
sl@0: 	return x->cert_info->key->public_key;
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int X509_check_private_key(X509 *x, EVP_PKEY *k)
sl@0: 	{
sl@0: 	EVP_PKEY *xk=NULL;
sl@0: 	int ok=0;
sl@0: 
sl@0: 	xk=X509_get_pubkey(x);
sl@0: 	switch (EVP_PKEY_cmp(xk, k))
sl@0: 		{
sl@0: 	case 1:
sl@0: 		ok=1;
sl@0: 		break;
sl@0: 	case 0:
sl@0: 		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_VALUES_MISMATCH);
sl@0: 		break;
sl@0: 	case -1:
sl@0: 		X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_KEY_TYPE_MISMATCH);
sl@0: 		break;
sl@0: 	case -2:
sl@0: #ifndef OPENSSL_NO_EC
sl@0: 		if (k->type == EVP_PKEY_EC)
sl@0: 			{
sl@0: 			X509err(X509_F_X509_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);
sl@0: 			break;
sl@0: 			}
sl@0: #endif
sl@0: #ifndef OPENSSL_NO_DH
sl@0: 		if (k->type == EVP_PKEY_DH)
sl@0: 			{
sl@0: 			/* No idea */
sl@0: 			X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_CANT_CHECK_DH_KEY);
sl@0: 			break;
sl@0: 			}
sl@0: #endif
sl@0: 	        X509err(X509_F_X509_CHECK_PRIVATE_KEY,X509_R_UNKNOWN_KEY_TYPE);
sl@0: 		}
sl@0: 
sl@0: 	EVP_PKEY_free(xk);
sl@0: 	return(ok);
sl@0: 	}