/* $OpenBSD: x509_cmp.c,v 1.35 2019/03/13 20:34:00 tb Exp $ */ /* 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 #include #include #include #include #include #include #include #include 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 = 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); if (f == NULL) goto err; if (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL)) goto err; if (!EVP_DigestUpdate(&ctx, (unsigned char *)f, strlen(f))) goto err; free(f); f = NULL; if (!EVP_DigestUpdate(&ctx, (unsigned char *)a->cert_info->serialNumber->data, (unsigned long)a->cert_info->serialNumber->length)) goto err; if (!EVP_DigestFinal_ex(&ctx, &(md[0]), NULL)) goto err; ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)) & 0xffffffffL; err: EVP_MD_CTX_cleanup(&ctx); free(f); 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)); } #ifndef OPENSSL_NO_SHA int X509_CRL_match(const X509_CRL *a, const X509_CRL *b) { return memcmp(a->sha1_hash, b->sha1_hash, 20); } #endif X509_NAME * X509_get_issuer_name(const X509 *a) { return (a->cert_info->issuer); } unsigned long X509_issuer_name_hash(X509 *x) { return (X509_NAME_hash(x->cert_info->issuer)); } #ifndef OPENSSL_NO_MD5 unsigned long X509_issuer_name_hash_old(X509 *x) { return (X509_NAME_hash_old(x->cert_info->issuer)); } #endif X509_NAME * X509_get_subject_name(const X509 *a) { return (a->cert_info->subject); } ASN1_INTEGER * X509_get_serialNumber(X509 *a) { return (a->cert_info->serialNumber); } const ASN1_INTEGER * X509_get0_serialNumber(const 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_MD5 unsigned long X509_subject_name_hash_old(X509 *x) { return (X509_NAME_hash_old(x->cert_info->subject)); } #endif #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 int X509_NAME_cmp(const X509_NAME *a, const X509_NAME *b) { int ret; /* Ensure canonical encoding is present and up to date */ if (!a->canon_enc || a->modified) { ret = i2d_X509_NAME((X509_NAME *)a, NULL); if (ret < 0) return -2; } if (!b->canon_enc || b->modified) { ret = i2d_X509_NAME((X509_NAME *)b, NULL); if (ret < 0) return -2; } ret = a->canon_enclen - b->canon_enclen; if (ret) return ret; return memcmp(a->canon_enc, b->canon_enc, a->canon_enclen); } unsigned long X509_NAME_hash(X509_NAME *x) { unsigned long ret = 0; unsigned char md[SHA_DIGEST_LENGTH]; /* Make sure X509_NAME structure contains valid cached encoding */ i2d_X509_NAME(x, NULL); if (!EVP_Digest(x->canon_enc, x->canon_enclen, md, NULL, EVP_sha1(), NULL)) return 0; ret = (((unsigned long)md[0]) | ((unsigned long)md[1] << 8L) | ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)) & 0xffffffffL; return (ret); } #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_old(X509_NAME *x) { EVP_MD_CTX md_ctx; unsigned long ret = 0; unsigned char md[16]; /* Make sure X509_NAME structure contains valid cached encoding */ i2d_X509_NAME(x, NULL); EVP_MD_CTX_init(&md_ctx); if (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)) 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(&md_ctx); 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)); } EVP_PKEY * X509_get0_pubkey(const X509 *x) { if (x == NULL || x->cert_info == NULL) return (NULL); return (X509_PUBKEY_get0(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(const X509 *x, const EVP_PKEY *k) { const EVP_PKEY *xk; int ret; xk = X509_get0_pubkey(x); if (xk) ret = EVP_PKEY_cmp(xk, k); else ret = -2; switch (ret) { case 1: break; case 0: X509error(X509_R_KEY_VALUES_MISMATCH); break; case -1: X509error(X509_R_KEY_TYPE_MISMATCH); break; case -2: X509error(X509_R_UNKNOWN_KEY_TYPE); } if (ret > 0) return 1; return 0; } /* * Not strictly speaking an "up_ref" as a STACK doesn't have a reference * count but it has the same effect by duping the STACK and upping the ref of * each X509 structure. */ STACK_OF(X509) * X509_chain_up_ref(STACK_OF(X509) *chain) { STACK_OF(X509) *ret; size_t i; ret = sk_X509_dup(chain); for (i = 0; i < sk_X509_num(ret); i++) X509_up_ref(sk_X509_value(ret, i)); return ret; }