/*

 * Copyright 2015-2021 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#ifndef OSSL_INTERNAL_DANE_H

#define OSSL_INTERNAL_DANE_H

# pragma once

# include <openssl/safestack.h>

/*-

 * Certificate usages:

 * https://tools.ietf.org/html/rfc6698#section-2.1.1

 */

#define DANETLS_USAGE_PKIX_TA   0

#define DANETLS_USAGE_PKIX_EE   1

#define DANETLS_USAGE_DANE_TA   2

#define DANETLS_USAGE_DANE_EE   3

#define DANETLS_USAGE_LAST      DANETLS_USAGE_DANE_EE

/*-

 * Selectors:

 * https://tools.ietf.org/html/rfc6698#section-2.1.2

 */

#define DANETLS_SELECTOR_CERT   0

#define DANETLS_SELECTOR_SPKI   1

#define DANETLS_SELECTOR_LAST   DANETLS_SELECTOR_SPKI

/*-

 * Matching types:

 * https://tools.ietf.org/html/rfc6698#section-2.1.3

 */

#define DANETLS_MATCHING_FULL   0

#define DANETLS_MATCHING_2256   1

#define DANETLS_MATCHING_2512   2

#define DANETLS_MATCHING_LAST   DANETLS_MATCHING_2512

typedef struct danetls_record_st {

    uint8_t usage;

    uint8_t selector;

    uint8_t mtype;

    unsigned char *data;

    size_t dlen;

    EVP_PKEY *spki;

} danetls_record;

DEFINE_STACK_OF(danetls_record)

/*

 * Shared DANE context

 */

struct dane_ctx_st {

    const EVP_MD  **mdevp;      /* mtype -> digest */

    uint8_t        *mdord;      /* mtype -> preference */

    uint8_t         mdmax;      /* highest supported mtype */

    unsigned long   flags;      /* feature bitmask */

};

/*

 * Per connection DANE state

 */

struct ssl_dane_st {

    struct dane_ctx_st *dctx;

    STACK_OF(danetls_record) *trecs;

    STACK_OF(X509) *certs;      /* DANE-TA(2) Cert(0) Full(0) certs */

    danetls_record *mtlsa;      /* Matching TLSA record */

    X509           *mcert;      /* DANE matched cert */

    uint32_t        umask;      /* Usages present */

    int             mdpth;      /* Depth of matched cert */

    int             pdpth;      /* Depth of PKIX trust */

    unsigned long   flags;      /* feature bitmask */

};

#define DANETLS_ENABLED(dane)  \

    ((dane) != NULL && sk_danetls_record_num((dane)->trecs) > 0)

#define DANETLS_USAGE_BIT(u)   (((uint32_t)1) << u)

#define DANETLS_PKIX_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_TA))

#define DANETLS_PKIX_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_PKIX_EE))

#define DANETLS_DANE_TA_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_TA))

#define DANETLS_DANE_EE_MASK (DANETLS_USAGE_BIT(DANETLS_USAGE_DANE_EE))

#define DANETLS_PKIX_MASK (DANETLS_PKIX_TA_MASK | DANETLS_PKIX_EE_MASK)

#define DANETLS_DANE_MASK (DANETLS_DANE_TA_MASK | DANETLS_DANE_EE_MASK)

#define DANETLS_TA_MASK (DANETLS_PKIX_TA_MASK | DANETLS_DANE_TA_MASK)

#define DANETLS_EE_MASK (DANETLS_PKIX_EE_MASK | DANETLS_DANE_EE_MASK)

#define DANETLS_HAS_PKIX(dane) ((dane) && ((dane)->umask & DANETLS_PKIX_MASK))

#define DANETLS_HAS_DANE(dane) ((dane) && ((dane)->umask & DANETLS_DANE_MASK))

#define DANETLS_HAS_TA(dane)   ((dane) && ((dane)->umask & DANETLS_TA_MASK))

#define DANETLS_HAS_EE(dane)   ((dane) && ((dane)->umask & DANETLS_EE_MASK))

#define DANETLS_HAS_PKIX_TA(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_TA_MASK))

#define DANETLS_HAS_PKIX_EE(dane) ((dane)&&((dane)->umask & DANETLS_PKIX_EE_MASK))

#define DANETLS_HAS_DANE_TA(dane) ((dane)&&((dane)->umask & DANETLS_DANE_TA_MASK))

#define DANETLS_HAS_DANE_EE(dane) ((dane)&&((dane)->umask & DANETLS_DANE_EE_MASK))

#endif /* OSSL_INTERNAL_DANE_H */