129 lines
5.0 KiB
C
Executable File
129 lines
5.0 KiB
C
Executable File
/* $OpenBSD: x509_internal.h,v 1.3 2020/09/15 11:55:14 beck Exp $ */
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/*
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* Copyright (c) 2020 Bob Beck <beck@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef HEADER_X509_INTERNAL_H
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#define HEADER_X509_INTERNAL_H
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/* Internal use only, not public API */
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#include <netinet/in.h>
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#include <openssl/x509_verify.h>
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/* Hard limits on structure size and number of signature checks. */
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#define X509_VERIFY_MAX_CHAINS 8 /* Max validated chains */
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#define X509_VERIFY_MAX_CHAIN_CERTS 32 /* Max depth of a chain */
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#define X509_VERIFY_MAX_SIGCHECKS 256 /* Max signature checks */
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/*
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* Limit the number of names and constraints we will check in a chain
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* to avoid a hostile input DOS
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*/
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#define X509_VERIFY_MAX_CHAIN_NAMES 512
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#define X509_VERIFY_MAX_CHAIN_CONSTRAINTS 512
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/*
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* Hold the parsed and validated result of names from a certificate.
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* these typically come from a GENERALNAME, but we store the parsed
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* and validated results, not the ASN1 bytes.
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*/
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struct x509_constraints_name {
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int type; /* GEN_* types from GENERAL_NAME */
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char *name; /* Name to check */
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char *local; /* holds the local part of GEN_EMAIL */
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uint8_t *der; /* DER encoded value or NULL*/
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size_t der_len;
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int af; /* INET and INET6 are supported */
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uint8_t address[32]; /* Must hold ipv6 + mask */
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};
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struct x509_constraints_names {
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struct x509_constraints_name **names;
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size_t names_len;
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size_t names_count;
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};
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struct x509_verify_chain {
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STACK_OF(X509) *certs; /* Kept in chain order, includes leaf */
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struct x509_constraints_names *names; /* All names from all certs */
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};
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struct x509_verify_ctx {
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X509_STORE_CTX *xsc;
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struct x509_verify_chain **chains; /* Validated chains */
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size_t chains_count;
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STACK_OF(X509) *roots; /* Trusted roots for this validation */
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STACK_OF(X509) *intermediates; /* Intermediates provided by peer */
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time_t *check_time; /* Time for validity checks */
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int purpose; /* Cert purpose we are validating */
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size_t max_chains; /* Max chains to return */
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size_t max_depth; /* Max chain depth for validation */
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size_t max_sigs; /* Max number of signature checks */
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size_t sig_checks; /* Number of signature checks done */
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size_t error_depth; /* Depth of last error seen */
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int error; /* Last error seen */
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};
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int ASN1_time_tm_clamp_notafter(struct tm *tm);
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__BEGIN_HIDDEN_DECLS
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int x509_vfy_check_id(X509_STORE_CTX *ctx);
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int x509_vfy_check_revocation(X509_STORE_CTX *ctx);
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int x509_vfy_check_policy(X509_STORE_CTX *ctx);
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int x509_vfy_check_trust(X509_STORE_CTX *ctx);
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int x509_vfy_check_chain_extensions(X509_STORE_CTX *ctx);
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void x509v3_cache_extensions(X509 *x);
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int x509_verify_asn1_time_to_tm(const ASN1_TIME *atime, struct tm *tm,
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int notafter);
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struct x509_verify_ctx *x509_verify_ctx_new_from_xsc(X509_STORE_CTX *xsc,
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STACK_OF(X509) *roots);
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void x509_constraints_name_clear(struct x509_constraints_name *name);
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int x509_constraints_names_add(struct x509_constraints_names *names,
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struct x509_constraints_name *name);
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struct x509_constraints_names *x509_constraints_names_dup(
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struct x509_constraints_names *names);
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void x509_constraints_names_clear(struct x509_constraints_names *names);
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struct x509_constraints_names *x509_constraints_names_new(void);
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void x509_constraints_names_free(struct x509_constraints_names *names);
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int x509_constraints_valid_host(uint8_t *name, size_t len);
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int x509_constraints_valid_sandns(uint8_t *name, size_t len);
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int x509_constraints_domain(char *domain, size_t dlen, char *constraint,
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size_t len);
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int x509_constraints_parse_mailbox(uint8_t *candidate, size_t len,
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struct x509_constraints_name *name);
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int x509_constraints_valid_domain_constraint(uint8_t *constraint,
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size_t len);
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int x509_constraints_uri_host(uint8_t *uri, size_t len, char **hostp);
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int x509_constraints_uri(uint8_t *uri, size_t ulen, uint8_t *constraint,
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size_t len, int *error);
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int x509_constraints_extract_names(struct x509_constraints_names *names,
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X509 *cert, int include_cn, int *error);
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int x509_constraints_extract_constraints(X509 *cert,
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struct x509_constraints_names *permitted,
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struct x509_constraints_names *excluded, int *error);
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int x509_constraints_check(struct x509_constraints_names *names,
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struct x509_constraints_names *permitted,
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struct x509_constraints_names *excluded, int *error);
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int x509_constraints_chain(STACK_OF(X509) *chain, int *error,
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int *depth);
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__END_HIDDEN_DECLS
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#endif
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