x509_cmp.c
/* crypto/x509/x509_cmp.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 <ctype.h>
#include "cryptlib.h"
#include <openssl/asn1.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
int X509_issuer_and_serial_cmp(const X509 *a, const X509 *b)
{
int i;
X509_CINF *ai, *bi;
ai = a->cert_info;
bi = b->cert_info;
i = M_ASN1_INTEGER_cmp(ai->serialNumber, bi->serialNumber);
if (i)
return (i);
return (X509_NAME_cmp(ai->issuer, bi->issuer));
}
#ifndef OPENSSL_NO_MD5
unsigned long X509_issuer_and_serial_hash(X509 *a)
{
unsigned long ret = 0;
EVP_MD_CTX ctx;
unsigned char md[16];
char *f;
EVP_MD_CTX_init(&ctx);
f = X509_NAME_oneline(a->cert_info->issuer, NULL, 0);
ret = strlen(f);
EVP_DigestInit_ex(&ctx, EVP_md5(), NULL);
EVP_DigestUpdate(&ctx, (unsigned char *)f, ret);
OPENSSL_free(f);
EVP_DigestUpdate(&ctx, (unsigned char *)a->cert_info->serialNumber->data,
(unsigned long)a->cert_info->serialNumber->length);
EVP_DigestFinal_ex(&ctx, &(md[0]), NULL);
ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) |
((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)
) & 0xffffffffL;
EVP_MD_CTX_cleanup(&ctx);
return (ret);
}
#endif
int X509_issuer_name_cmp(const X509 *a, const X509 *b)
{
return (X509_NAME_cmp(a->cert_info->issuer, b->cert_info->issuer));
}
int X509_subject_name_cmp(const X509 *a, const X509 *b)
{
return (X509_NAME_cmp(a->cert_info->subject, b->cert_info->subject));
}
int X509_CRL_cmp(const X509_CRL *a, const X509_CRL *b)
{
return (X509_NAME_cmp(a->crl->issuer, b->crl->issuer));
}
X509_NAME *X509_get_issuer_name(X509 *a)
{
return (a->cert_info->issuer);
}
unsigned long X509_issuer_name_hash(X509 *x)
{
return (X509_NAME_hash(x->cert_info->issuer));
}
X509_NAME *X509_get_subject_name(X509 *a)
{
return (a->cert_info->subject);
}
ASN1_INTEGER *X509_get_serialNumber(X509 *a)
{
return (a->cert_info->serialNumber);
}
unsigned long X509_subject_name_hash(X509 *x)
{
return (X509_NAME_hash(x->cert_info->subject));
}
#ifndef OPENSSL_NO_SHA
/*
* Compare two certificates: they must be identical for this to work. NB:
* Although "cmp" operations are generally prototyped to take "const"
* arguments (eg. for use in STACKs), the way X509 handling is - these
* operations may involve ensuring the hashes are up-to-date and ensuring
* certain cert information is cached. So this is the point where the
* "depth-first" constification tree has to halt with an evil cast.
*/
int X509_cmp(const X509 *a, const X509 *b)
{
/* ensure hash is valid */
X509_check_purpose((X509 *)a, -1, 0);
X509_check_purpose((X509 *)b, -1, 0);
return memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH);
}
#endif
/* Case insensitive string comparision */
static int nocase_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
{
int i;
if (a->length != b->length)
return (a->length - b->length);
for (i = 0; i < a->length; i++) {
int ca, cb;
ca = tolower(a->data[i]);
cb = tolower(b->data[i]);
if (ca != cb)
return (ca - cb);
}
return 0;
}
/*
* Case insensitive string comparision with space normalization Space
* normalization - ignore leading, trailing spaces, multiple spaces between
* characters are replaced by single space
*/
static int nocase_spacenorm_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
{
unsigned char *pa = NULL, *pb = NULL;
int la, lb;
la = a->length;
lb = b->length;
pa = a->data;
pb = b->data;
/* skip leading spaces */
while (la > 0 && isspace(*pa)) {
la--;
pa++;
}
while (lb > 0 && isspace(*pb)) {
lb--;
pb++;
}
/* skip trailing spaces */
while (la > 0 && isspace(pa[la - 1]))
la--;
while (lb > 0 && isspace(pb[lb - 1]))
lb--;
/* compare strings with space normalization */
while (la > 0 && lb > 0) {
int ca, cb;
/* compare character */
ca = tolower(*pa);
cb = tolower(*pb);
if (ca != cb)
return (ca - cb);
pa++;
pb++;
la--;
lb--;
if (la <= 0 || lb <= 0)
break;
/* is white space next character ? */
if (isspace(*pa) && isspace(*pb)) {
/* skip remaining white spaces */
while (la > 0 && isspace(*pa)) {
la--;
pa++;
}
while (lb > 0 && isspace(*pb)) {
lb--;
pb++;
}
}
}
if (la > 0 || lb > 0)
return la - lb;
return 0;
}
static int asn1_string_memcmp(ASN1_STRING *a, ASN1_STRING *b)
{
int j;
j = a->length - b->length;
if (j)
return j;
return memcmp(a->data, b->data, a->length);
}
#define STR_TYPE_CMP (B_ASN1_PRINTABLESTRING|B_ASN1_T61STRING|B_ASN1_UTF8STRING)
int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b)
{
int i, j;
X509_NAME_ENTRY *na, *nb;
unsigned long nabit, nbbit;
j = sk_X509_NAME_ENTRY_num(a->entries)
- sk_X509_NAME_ENTRY_num(b->entries);
if (j)
return j;
for (i = sk_X509_NAME_ENTRY_num(a->entries) - 1; i >= 0; i--) {
na = sk_X509_NAME_ENTRY_value(a->entries, i);
nb = sk_X509_NAME_ENTRY_value(b->entries, i);
j = na->value->type - nb->value->type;
if (j) {
nabit = ASN1_tag2bit(na->value->type);
nbbit = ASN1_tag2bit(nb->value->type);
if (!(nabit & STR_TYPE_CMP) || !(nbbit & STR_TYPE_CMP))
return j;
if (!asn1_string_memcmp(na->value, nb->value))
j = 0;
} else if (na->value->type == V_ASN1_PRINTABLESTRING)
j = nocase_spacenorm_cmp(na->value, nb->value);
else if (na->value->type == V_ASN1_IA5STRING
&& OBJ_obj2nid(na->object) == NID_pkcs9_emailAddress)
j = nocase_cmp(na->value, nb->value);
else
j = asn1_string_memcmp(na->value, nb->value);
if (j)
return (j);
j = na->set - nb->set;
if (j)
return (j);
}
/*
* We will check the object types after checking the values since the
* values will more often be different than the object types.
*/
for (i = sk_X509_NAME_ENTRY_num(a->entries) - 1; i >= 0; i--) {
na = sk_X509_NAME_ENTRY_value(a->entries, i);
nb = sk_X509_NAME_ENTRY_value(b->entries, i);
j = OBJ_cmp(na->object, nb->object);
if (j)
return (j);
}
return (0);
}
#ifndef OPENSSL_NO_MD5
/*
* I now DER encode the name and hash it. Since I cache the DER encoding,
* this is reasonably efficient.
*/
unsigned long X509_NAME_hash(X509_NAME *x)
{
unsigned long ret = 0;
unsigned char md[16];
EVP_MD_CTX md_ctx;
/* Make sure X509_NAME structure contains valid cached encoding */
i2d_X509_NAME(x, NULL);
EVP_MD_CTX_init(&md_ctx);
EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
EVP_DigestInit_ex(&md_ctx, EVP_md5(), NULL);
EVP_DigestUpdate(&md_ctx, x->bytes->data, x->bytes->length);
EVP_DigestFinal_ex(&md_ctx, md, NULL);
EVP_MD_CTX_cleanup(&md_ctx);
ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) |
((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)
) & 0xffffffffL;
return (ret);
}
#endif
/* Search a stack of X509 for a match */
X509 *X509_find_by_issuer_and_serial(STACK_OF(X509) *sk, X509_NAME *name,
ASN1_INTEGER *serial)
{
int i;
X509_CINF cinf;
X509 x, *x509 = NULL;
if (!sk)
return NULL;
x.cert_info = &cinf;
cinf.serialNumber = serial;
cinf.issuer = name;
for (i = 0; i < sk_X509_num(sk); i++) {
x509 = sk_X509_value(sk, i);
if (X509_issuer_and_serial_cmp(x509, &x) == 0)
return (x509);
}
return (NULL);
}
X509 *X509_find_by_subject(STACK_OF(X509) *sk, X509_NAME *name)
{
X509 *x509;
int i;
for (i = 0; i < sk_X509_num(sk); i++) {
x509 = sk_X509_value(sk, i);
if (X509_NAME_cmp(X509_get_subject_name(x509), name) == 0)
return (x509);
}
return (NULL);
}
EVP_PKEY *X509_get_pubkey(X509 *x)
{
if ((x == NULL) || (x->cert_info == NULL))
return (NULL);
return (X509_PUBKEY_get(x->cert_info->key));
}
ASN1_BIT_STRING *X509_get0_pubkey_bitstr(const X509 *x)
{
if (!x)
return NULL;
return x->cert_info->key->public_key;
}
int X509_check_private_key(X509 *x, EVP_PKEY *k)
{
EVP_PKEY *xk = NULL;
int ok = 0;
xk = X509_get_pubkey(x);
switch (EVP_PKEY_cmp(xk, k)) {
case 1:
ok = 1;
break;
case 0:
X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_VALUES_MISMATCH);
break;
case -1:
X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_KEY_TYPE_MISMATCH);
break;
case -2:
#ifndef OPENSSL_NO_EC
if (k->type == EVP_PKEY_EC) {
X509err(X509_F_X509_CHECK_PRIVATE_KEY, ERR_R_EC_LIB);
break;
}
#endif
#ifndef OPENSSL_NO_DH
if (k->type == EVP_PKEY_DH) {
/* No idea */
X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_CANT_CHECK_DH_KEY);
break;
}
#endif
X509err(X509_F_X509_CHECK_PRIVATE_KEY, X509_R_UNKNOWN_KEY_TYPE);
}
EVP_PKEY_free(xk);
return (ok);
}
