x509_cmp.c
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- /* 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;
- j = asn1_string_memcmp(na->value, nb->value);
- }
- 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];
- /* Make sure X509_NAME structure contains valid cached encoding */
- i2d_X509_NAME(x,NULL);
- EVP_Digest(x->bytes->data, x->bytes->length, md, NULL, EVP_md5(), NULL);
- 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);
- }