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/* $OpenBSD: x509_internal.h,v 1.1 2020/09/11 18:34:29 beck Exp $ */
/*
* Copyright (c) 2020 Bob Beck <beck@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef HEADER_X509_INTERNAL_H
#define HEADER_X509_INTERNAL_H
/* Internal use only, not public API */
#include <netinet/in.h>
/*
* Limit the number of names and constraints we will check in a chain
* to avoid a hostile input DOS
*/
#define X509_VERIFY_MAX_CHAIN_NAMES 512
#define X509_VERIFY_MAX_CHAIN_CONSTRAINTS 512
/*
* Hold the parsed and validated result of names from a certificate.
* these typically come from a GENERALNAME, but we store the parsed
* and validated results, not the ASN1 bytes.
*/
struct x509_constraints_name {
int type; /* GEN_* types from GENERAL_NAME */
char *name; /* Name to check */
char *local; /* holds the local part of GEN_EMAIL */
uint8_t *der; /* DER encoded value or NULL*/
size_t der_len;
int af; /* INET and INET6 are supported */
uint8_t address[32]; /* Must hold ipv6 + mask */
};
struct x509_constraints_names {
struct x509_constraints_name **names;
size_t names_len;
size_t names_count;
};
struct x509_verify_chain {
STACK_OF(X509) *certs; /* Kept in chain order, includes leaf */
struct x509_constraints_names *names; /* All names from all certs */
};
__BEGIN_HIDDEN_DECLS
void x509_constraints_name_clear(struct x509_constraints_name *name);
int x509_constraints_names_add(struct x509_constraints_names *names,
struct x509_constraints_name *name);
struct x509_constraints_names *x509_constraints_names_dup(
struct x509_constraints_names *names);
void x509_constraints_names_clear(struct x509_constraints_names *names);
struct x509_constraints_names *x509_constraints_names_new(void);
void x509_constraints_names_free(struct x509_constraints_names *names);
int x509_constraints_valid_host(uint8_t *name, size_t len);
int x509_constraints_valid_sandns(uint8_t *name, size_t len);
int x509_constraints_domain(char *domain, size_t dlen, char *constraint,
size_t len);
int x509_constraints_parse_mailbox(uint8_t *candidate, size_t len,
struct x509_constraints_name *name);
int x509_constraints_valid_domain_constraint(uint8_t *constraint,
size_t len);
int x509_constraints_uri_host(uint8_t *uri, size_t len, char **hostp);
int x509_constraints_uri(uint8_t *uri, size_t ulen, uint8_t *constraint,
size_t len, int *error);
int x509_constraints_extract_names(struct x509_constraints_names *names,
X509 *cert, int include_cn, int *error);
int x509_constraints_extract_constraints(X509 *cert,
struct x509_constraints_names *permitted,
struct x509_constraints_names *excluded, int *error);
int x509_constraints_check(struct x509_constraints_names *names,
struct x509_constraints_names *permitted,
struct x509_constraints_names *excluded, int *error);
int x509_constraints_chain(STACK_OF(X509) *chain, int *error,
int *depth);
__END_HIDDEN_DECLS
#endif
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