/* 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); }