/*      $NetBSD: libssl_compat.h,v 1.2 2020/05/25 20:47:19 christos Exp $       */

/*
* libssl_compat.h -- OpenSSL v1.1 compatibility shims
*
* ---------------------------------------------------------------------
*
* Written by Juergen Perlinger <[email protected]> for the NTP project
*
* Based on an idea by Kurt Roeckx <[email protected]>
*
* ---------------------------------------------------------------------
* This is a clean room implementation of shim functions that have
* counterparts in the OpenSSL v1.1 API but not in earlier versions.
*
* If the OpenSSL version used for compilation needs the shims (that is,
* does not provide the new functions) the names of these functions are
* redirected to our shims.
* ---------------------------------------------------------------------
*/

#ifndef NTP_LIBSSL_COMPAT_H
#define NTP_LIBSSL_COMPAT_H

#include "openssl/evp.h"
#include "openssl/dsa.h"
#include "openssl/rsa.h"

#ifndef OPENSSL_VERSION_NUMBER
#define OPENSSL_VERSION_NUMBER SSLEAY_VERSION_NUMBER
#endif

#ifndef OPENSSL_VERSION_TEXT
#define OPENSSL_VERSION_TEXT SSLEAY_VERSION_TEXT
#endif

#ifndef OPENSSL_VERSION
#define OPENSSL_VERSION SSLEAY_VERSION
#endif

/* ----------------------------------------------------------------- */
#if OPENSSL_VERSION_NUMBER < 0x10100000L
/* ----------------------------------------------------------------- */

# include <openssl/objects.h>
# include <openssl/x509.h>

/* shim the new-style API on an old-style OpenSSL */

extern BN_GENCB*        sslshimBN_GENCB_new(void);
extern void             sslshimBN_GENCB_free(BN_GENCB*);

extern EVP_MD_CTX*      sslshim_EVP_MD_CTX_new(void);
extern void             sslshim_EVP_MD_CTX_free(EVP_MD_CTX *ctx);

extern int      sslshim_EVP_PKEY_id(const EVP_PKEY * pkey);
extern int      sslshim_EVP_PKEY_base_id(const EVP_PKEY * pkey);
extern RSA*     sslshim_EVP_PKEY_get0_RSA(EVP_PKEY * pkey);
extern DSA*     sslshim_EVP_PKEY_get0_DSA(EVP_PKEY * pkey);

extern void     sslshim_RSA_get0_key(const RSA *prsa, const BIGNUM **pn,
                                    const BIGNUM **pe, const BIGNUM **pd);
extern int      sslshim_RSA_set0_key(RSA *prsa, BIGNUM *n,
                                    BIGNUM *e, BIGNUM *d);
extern void     sslshim_RSA_get0_factors(const RSA *prsa, const BIGNUM **pp,
                                        const BIGNUM **pq);
extern int      sslshim_RSA_set0_factors(RSA *prsar, BIGNUM *p, BIGNUM *q);
extern int      sslshim_RSA_set0_crt_params(RSA *prsa, BIGNUM *dmp1,
                                       BIGNUM *dmq1, BIGNUM *iqmp);

extern void     sslshim_DSA_SIG_get0(const DSA_SIG *psig, const BIGNUM **pr,
                                    const BIGNUM **ps);
extern int      sslshim_DSA_SIG_set0(DSA_SIG *psig, BIGNUM *r, BIGNUM *s);
extern void     sslshim_DSA_get0_pqg(const DSA *pdsa, const BIGNUM **pp,
                                const BIGNUM **pq, const BIGNUM **pg);
extern int      sslshim_DSA_set0_pqg(DSA *pdsa, BIGNUM *p, BIGNUM *q, BIGNUM *g);
extern void     sslshim_DSA_get0_key(const DSA *pdsa, const BIGNUM **ppub_key,
                                const BIGNUM **ppriv_key);
extern int      sslshim_DSA_set0_key(DSA *pdsa, BIGNUM *pub_key,
                                    BIGNUM *priv_key);

extern int      sslshim_X509_get_signature_nid(const X509 *x);

#define BN_GENCB_new            sslshimBN_GENCB_new
#define BN_GENCB_free           sslshimBN_GENCB_free

#define EVP_MD_CTX_new          sslshim_EVP_MD_CTX_new
#define EVP_MD_CTX_free         sslshim_EVP_MD_CTX_free

#define EVP_PKEY_id             sslshim_EVP_PKEY_id
#define EVP_PKEY_base_id        sslshim_EVP_PKEY_base_id
#define EVP_PKEY_get0_RSA       sslshim_EVP_PKEY_get0_RSA
#define EVP_PKEY_get0_DSA       sslshim_EVP_PKEY_get0_DSA

#define RSA_get0_key            sslshim_RSA_get0_key
#define RSA_set0_key            sslshim_RSA_set0_key
#define RSA_get0_factors        sslshim_RSA_get0_factors
#define RSA_set0_factors        sslshim_RSA_set0_factors
#define RSA_set0_crt_params     sslshim_RSA_set0_crt_params

#define DSA_SIG_get0            sslshim_DSA_SIG_get0
#define DSA_SIG_set0            sslshim_DSA_SIG_set0
#define DSA_get0_pqg            sslshim_DSA_get0_pqg
#define DSA_set0_pqg            sslshim_DSA_set0_pqg
#define DSA_get0_key            sslshim_DSA_get0_key
#define DSA_set0_key            sslshim_DSA_set0_key

#define X509_get_signature_nid  sslshim_X509_get_signature_nid

#define OpenSSL_version_num     SSLeay
#define OpenSSL_version         SSLeay_version
#define X509_get0_notBefore     X509_get_notBefore
#define X509_getm_notBefore     X509_get_notBefore
#define X509_get0_notAfter      X509_get_notAfter
#define X509_getm_notAfter      X509_get_notAfter

/* ----------------------------------------------------------------- */
#endif /* OPENSSL_VERSION_NUMBER < v1.1.0 */
/* ----------------------------------------------------------------- */

#endif /* NTP_LIBSSL_COMPAT_H */

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