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Diffstat (limited to 'src/crypto/x509/x509_cmp.c')
-rw-r--r-- | src/crypto/x509/x509_cmp.c | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/src/crypto/x509/x509_cmp.c b/src/crypto/x509/x509_cmp.c new file mode 100644 index 0000000..712e36b --- /dev/null +++ b/src/crypto/x509/x509_cmp.c @@ -0,0 +1,490 @@ +/* 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 <string.h> + +#include <openssl/asn1.h> +#include <openssl/buf.h> +#include <openssl/digest.h> +#include <openssl/err.h> +#include <openssl/mem.h> +#include <openssl/obj.h> +#include <openssl/stack.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)); + } + +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 (!EVP_DigestInit_ex(&ctx, EVP_md5(), NULL)) + goto err; + if (!EVP_DigestUpdate(&ctx,(unsigned char *)f,strlen(f))) + goto err; + OPENSSL_free(f); + 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); + return(ret); + } + +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)); + } + +int X509_CRL_match(const X509_CRL *a, const X509_CRL *b) + { + return memcmp(a->sha1_hash, b->sha1_hash, 20); + } + +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)); + } + +unsigned long X509_issuer_name_hash_old(X509 *x) + { + return(X509_NAME_hash_old(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)); + } + +unsigned long X509_subject_name_hash_old(X509 *x) + { + return(X509_NAME_hash_old(x->cert_info->subject)); + } + +/* 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) +{ + int rv; + /* ensure hash is valid */ + X509_check_purpose((X509 *)a, -1, 0); + X509_check_purpose((X509 *)b, -1, 0); + + rv = memcmp(a->sha1_hash, b->sha1_hash, SHA_DIGEST_LENGTH); + if (rv) + return rv; + /* Check for match against stored encoding too */ + if (!a->cert_info->enc.modified && !b->cert_info->enc.modified) + { + rv = (int)(a->cert_info->enc.len - b->cert_info->enc.len); + if (rv) + return rv; + return memcmp(a->cert_info->enc.enc, b->cert_info->enc.enc, + a->cert_info->enc.len); + } + return rv; +} + + +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); + } + + +/* 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); + /* EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); */ + 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); + } + +/* 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) + { + size_t 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; + size_t 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; + int ret; + + xk=X509_get_pubkey(x); + + if (xk) + ret = EVP_PKEY_cmp(xk, k); + else + ret = -2; + + switch (ret) + { + case 1: + break; + case 0: + OPENSSL_PUT_ERROR(X509, X509_check_private_key, X509_R_KEY_VALUES_MISMATCH); + break; + case -1: + OPENSSL_PUT_ERROR(X509, X509_check_private_key, X509_R_KEY_TYPE_MISMATCH); + break; + case -2: + OPENSSL_PUT_ERROR(X509, X509_check_private_key, X509_R_UNKNOWN_KEY_TYPE); + } + if (xk) + EVP_PKEY_free(xk); + if (ret > 0) + return 1; + return 0; + } + +/* Check a suite B algorithm is permitted: pass in a public key and + * the NID of its signature (or 0 if no signature). The pflags is + * a pointer to a flags field which must contain the suite B verification + * flags. + */ + + +static int check_suite_b(EVP_PKEY *pkey, int sign_nid, unsigned long *pflags) + { + const EC_GROUP *grp = NULL; + int curve_nid; + if (pkey && pkey->type == EVP_PKEY_EC) + grp = EC_KEY_get0_group(pkey->pkey.ec); + if (!grp) + return X509_V_ERR_SUITE_B_INVALID_ALGORITHM; + curve_nid = EC_GROUP_get_curve_name(grp); + /* Check curve is consistent with LOS */ + if (curve_nid == NID_secp384r1) /* P-384 */ + { + /* Check signature algorithm is consistent with + * curve. + */ + if (sign_nid != -1 && sign_nid != NID_ecdsa_with_SHA384) + return X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM; + if (!(*pflags & X509_V_FLAG_SUITEB_192_LOS)) + return X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED; + /* If we encounter P-384 we cannot use P-256 later */ + *pflags &= ~X509_V_FLAG_SUITEB_128_LOS_ONLY; + } + else if (curve_nid == NID_X9_62_prime256v1) /* P-256 */ + { + if (sign_nid != -1 && sign_nid != NID_ecdsa_with_SHA256) + return X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM; + if (!(*pflags & X509_V_FLAG_SUITEB_128_LOS_ONLY)) + return X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED; + } + else + return X509_V_ERR_SUITE_B_INVALID_CURVE; + + return X509_V_OK; + } + +int X509_chain_check_suiteb(int *perror_depth, X509 *x, STACK_OF(X509) *chain, + unsigned long flags) + { + int rv, sign_nid; + size_t i; + EVP_PKEY *pk = NULL; + unsigned long tflags; + if (!(flags & X509_V_FLAG_SUITEB_128_LOS)) + return X509_V_OK; + tflags = flags; + /* If no EE certificate passed in must be first in chain */ + if (x == NULL) + { + x = sk_X509_value(chain, 0); + i = 1; + } + else + i = 0; + + if (X509_get_version(x) != 2) + { + rv = X509_V_ERR_SUITE_B_INVALID_VERSION; + /* Correct error depth */ + i = 0; + goto end; + } + + pk = X509_get_pubkey(x); + /* Check EE key only */ + rv = check_suite_b(pk, -1, &tflags); + if (rv != X509_V_OK) + { + /* Correct error depth */ + i = 0; + goto end; + } + for(; i < sk_X509_num(chain); i++) + { + sign_nid = X509_get_signature_nid(x); + x = sk_X509_value(chain, i); + if (X509_get_version(x) != 2) + { + rv = X509_V_ERR_SUITE_B_INVALID_VERSION; + goto end; + } + EVP_PKEY_free(pk); + pk = X509_get_pubkey(x); + rv = check_suite_b(pk, sign_nid, &tflags); + if (rv != X509_V_OK) + goto end; + } + + /* Final check: root CA signature */ + rv = check_suite_b(pk, X509_get_signature_nid(x), &tflags); + end: + if (pk) + EVP_PKEY_free(pk); + if (rv != X509_V_OK) + { + /* Invalid signature or LOS errors are for previous cert */ + if ((rv == X509_V_ERR_SUITE_B_INVALID_SIGNATURE_ALGORITHM + || rv == X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED) && i) + i--; + /* If we have LOS error and flags changed then we are signing + * P-384 with P-256. Use more meaninggul error. + */ + if (rv == X509_V_ERR_SUITE_B_LOS_NOT_ALLOWED && flags != tflags) + rv = X509_V_ERR_SUITE_B_CANNOT_SIGN_P_384_WITH_P_256; + if (perror_depth) + *perror_depth = i; + } + return rv; + } + +int X509_CRL_check_suiteb(X509_CRL *crl, EVP_PKEY *pk, unsigned long flags) + { + int sign_nid; + if (!(flags & X509_V_FLAG_SUITEB_128_LOS)) + return X509_V_OK; + sign_nid = OBJ_obj2nid(crl->crl->sig_alg->algorithm); + return check_suite_b(pk, sign_nid, &flags); + } + +/* 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; + } |