[thirdparty/openssl.git] / include / openssl / dh.h

/*
 * Copyright 1995-2019 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 OPENSSL_DH_H
# define OPENSSL_DH_H
# pragma once

# include <openssl/macros.h>
# ifndef OPENSSL_NO_DEPRECATED_3_0
#  define HEADER_DH_H
# endif

# include <openssl/opensslconf.h>

# ifndef OPENSSL_NO_DH
#  include <openssl/e_os2.h>
#  include <openssl/bio.h>
#  include <openssl/asn1.h>
#  include <openssl/types.h>
#  ifndef OPENSSL_NO_DEPRECATED_1_1_0
#   include <openssl/bn.h>
#  endif
#  include <openssl/dherr.h>

#  ifdef  __cplusplus
extern "C" {
#  endif

#  ifndef OPENSSL_DH_MAX_MODULUS_BITS
#   define OPENSSL_DH_MAX_MODULUS_BITS    10000
#  endif

#  define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024

#  define DH_FLAG_CACHE_MONT_P     0x01

#  ifndef OPENSSL_NO_DEPRECATED_1_1_0
/*
 * Does nothing. Previously this switched off constant time behaviour.
 */
#   define DH_FLAG_NO_EXP_CONSTTIME 0x00
#  endif

#  ifndef OPENSSL_NO_DEPRECATED_3_0
/*
 * If this flag is set the DH method is FIPS compliant and can be used in
 * FIPS mode. This is set in the validated module method. If an application
 * sets this flag in its own methods it is its responsibility to ensure the
 * result is compliant.
 */

#   define DH_FLAG_FIPS_METHOD                     0x0400

/*
 * If this flag is set the operations normally disabled in FIPS mode are
 * permitted it is then the applications responsibility to ensure that the
 * usage is compliant.
 */

#   define DH_FLAG_NON_FIPS_ALLOW                  0x0400
#  endif

/* Already defined in ossl_typ.h */
/* typedef struct dh_st DH; */
/* typedef struct dh_method DH_METHOD; */

DECLARE_ASN1_ITEM(DHparams)

#  ifndef OPENSSL_NO_DEPRECATED_3_0
#   define DH_GENERATOR_2          2
#   define DH_GENERATOR_3          3
#   define DH_GENERATOR_5          5

/* DH_check error codes */
/*
 * NB: These values must align with the equivalently named macros in
 * internal/ffc.h.
 */
#   define DH_CHECK_P_NOT_PRIME            0x01
#   define DH_CHECK_P_NOT_SAFE_PRIME       0x02
#   define DH_UNABLE_TO_CHECK_GENERATOR    0x04
#   define DH_NOT_SUITABLE_GENERATOR       0x08
#   define DH_CHECK_Q_NOT_PRIME            0x10
#   define DH_CHECK_INVALID_Q_VALUE        0x20
#   define DH_CHECK_INVALID_J_VALUE        0x40
#   define DH_MODULUS_TOO_SMALL            0x80
#   define DH_MODULUS_TOO_LARGE            0x100

/* DH_check_pub_key error codes */
#   define DH_CHECK_PUBKEY_TOO_SMALL       0x01
#   define DH_CHECK_PUBKEY_TOO_LARGE       0x02
#   define DH_CHECK_PUBKEY_INVALID         0x04

/*
 * primes p where (p-1)/2 is prime too are called "safe"; we define this for
 * backward compatibility:
 */
#  define DH_CHECK_P_NOT_STRONG_PRIME     DH_CHECK_P_NOT_SAFE_PRIME

/* DH parameter generation types used by EVP_PKEY_CTX_set_dh_paramgen_type() */
#   define DH_PARAMGEN_TYPE_GENERATOR    0   /* Use a generator g */
#   define DH_PARAMGEN_TYPE_FIPS_186_2   1   /* Use legacy FIPS186-2 standard */
#   define DH_PARAMGEN_TYPE_FIPS_186_4   2   /* Use FIPS186-4 standard */

#   define DH_CHECK_P_NOT_STRONG_PRIME     DH_CHECK_P_NOT_SAFE_PRIME

#   define d2i_DHparams_fp(fp, x) \
        (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
                          (char *(*)())d2i_DHparams, \
                          (fp), \
                          (unsigned char **)(x))
#   define i2d_DHparams_fp(fp, x) \
        ASN1_i2d_fp(i2d_DHparams,(fp), (unsigned char *)(x))
#   define d2i_DHparams_bio(bp, x) \
        ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, bp, x)
#   define i2d_DHparams_bio(bp, x) \
        ASN1_i2d_bio_of(DH, i2d_DHparams, bp, x)

#   define d2i_DHxparams_fp(fp,x) \
        (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
                          (char *(*)())d2i_DHxparams, \
                          (fp), \
                          (unsigned char **)(x))
#   define i2d_DHxparams_fp(fp, x) \
        ASN1_i2d_fp(i2d_DHxparams,(fp), (unsigned char *)(x))
#   define d2i_DHxparams_bio(bp, x) \
        ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, bp, x)
#   define i2d_DHxparams_bio(bp, x) \
        ASN1_i2d_bio_of(DH, i2d_DHxparams, bp, x)
#  endif

DECLARE_ASN1_DUP_FUNCTION_name(DH, DHparams)

DEPRECATEDIN_3_0(const DH_METHOD *DH_OpenSSL(void))

DEPRECATEDIN_3_0(void DH_set_default_method(const DH_METHOD *meth))
DEPRECATEDIN_3_0(const DH_METHOD *DH_get_default_method(void))
DEPRECATEDIN_3_0(int DH_set_method(DH *dh, const DH_METHOD *meth))
DEPRECATEDIN_3_0(DH *DH_new_method(ENGINE *engine))

DH *DH_new(void);
void DH_free(DH *dh);
int DH_up_ref(DH *dh);
DEPRECATEDIN_3_0(int DH_bits(const DH *dh))
DEPRECATEDIN_3_0(int DH_size(const DH *dh))
DEPRECATEDIN_3_0(int DH_security_bits(const DH *dh))
#  ifndef OPENSSL_NO_DEPRECATED_3_0
#   define DH_get_ex_new_index(l, p, newf, dupf, freef) \
        CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, l, p, newf, dupf, freef)
#  endif
DEPRECATEDIN_3_0(int DH_set_ex_data(DH *d, int idx, void *arg))
DEPRECATEDIN_3_0(void *DH_get_ex_data(DH *d, int idx))

/* Deprecated version */
DEPRECATEDIN_0_9_8(DH *DH_generate_parameters(int prime_len, int generator,
                                              void (*callback) (int, int,
                                                                void *),
                                              void *cb_arg))

/* New version */
DEPRECATEDIN_3_0(int DH_generate_parameters_ex(DH *dh, int prime_len,
                                               int generator, BN_GENCB *cb))

DEPRECATEDIN_3_0(int DH_check_params_ex(const DH *dh))
DEPRECATEDIN_3_0(int DH_check_ex(const DH *dh))
DEPRECATEDIN_3_0(int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key))
/*
 * TODO(3.0): deprecate DH_check_params once ssl/statem/statem_clnt.c is fixed.
 */
int DH_check_params(const DH *dh, int *ret);
DEPRECATEDIN_3_0(int DH_check(const DH *dh, int *codes))
DEPRECATEDIN_3_0(int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key,
                                      int *codes))
DEPRECATEDIN_3_0(int DH_generate_key(DH *dh))
DEPRECATEDIN_3_0(int DH_compute_key(unsigned char *key, const BIGNUM *pub_key,
                                    DH *dh))
DEPRECATEDIN_3_0(int DH_compute_key_padded(unsigned char *key,
                                           const BIGNUM *pub_key, DH *dh))
DECLARE_ASN1_ENCODE_FUNCTIONS_only(DH, DHparams)
DECLARE_ASN1_ENCODE_FUNCTIONS_only(DH, DHxparams)
#  ifndef OPENSSL_NO_STDIO
DEPRECATEDIN_3_0(int DHparams_print_fp(FILE *fp, const DH *x))
#  endif
DEPRECATEDIN_3_0(int DHparams_print(BIO *bp, const DH *x))

/* RFC 5114 parameters */
DH *DH_get_1024_160(void);
DH *DH_get_2048_224(void);
DH *DH_get_2048_256(void);

/* Named parameters, currently RFC7919 and RFC3526 */
/* TODO(3.0): deprecate DH_new_by_nid() after converting ssl/s3_lib.c */
DH *DH_new_by_nid(int nid);
DEPRECATEDIN_3_0(int DH_get_nid(DH *dh))

#  ifndef OPENSSL_NO_CMS
/* RFC2631 KDF */
DEPRECATEDIN_3_0(int DH_KDF_X9_42(unsigned char *out, size_t outlen,
                                  const unsigned char *Z, size_t Zlen,
                                  ASN1_OBJECT *key_oid,
                                  const unsigned char *ukm,
                                  size_t ukmlen, const EVP_MD *md))
#  endif

void DH_get0_pqg(const DH *dh,
                 const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
void DH_get0_key(const DH *dh,
                 const BIGNUM **pub_key, const BIGNUM **priv_key);
int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
const BIGNUM *DH_get0_p(const DH *dh);
const BIGNUM *DH_get0_q(const DH *dh);
const BIGNUM *DH_get0_g(const DH *dh);
const BIGNUM *DH_get0_priv_key(const DH *dh);
const BIGNUM *DH_get0_pub_key(const DH *dh);
void DH_clear_flags(DH *dh, int flags);
int DH_test_flags(const DH *dh, int flags);
void DH_set_flags(DH *dh, int flags);
DEPRECATEDIN_3_0(ENGINE *DH_get0_engine(DH *d))
DEPRECATEDIN_3_0(long DH_get_length(const DH *dh))
DEPRECATEDIN_3_0(int DH_set_length(DH *dh, long length))

DEPRECATEDIN_3_0(DH_METHOD *DH_meth_new(const char *name, int flags))
DEPRECATEDIN_3_0(void DH_meth_free(DH_METHOD *dhm))
DEPRECATEDIN_3_0(DH_METHOD *DH_meth_dup(const DH_METHOD *dhm))
DEPRECATEDIN_3_0(const char *DH_meth_get0_name(const DH_METHOD *dhm))
DEPRECATEDIN_3_0(int DH_meth_set1_name(DH_METHOD *dhm, const char *name))
DEPRECATEDIN_3_0(int DH_meth_get_flags(const DH_METHOD *dhm))
DEPRECATEDIN_3_0(int DH_meth_set_flags(DH_METHOD *dhm, int flags))
DEPRECATEDIN_3_0(void *DH_meth_get0_app_data(const DH_METHOD *dhm))
DEPRECATEDIN_3_0(int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data))
DEPRECATEDIN_3_0(int (*DH_meth_get_generate_key(const DH_METHOD *dhm)) (DH *))
DEPRECATEDIN_3_0(int DH_meth_set_generate_key(DH_METHOD *dhm,
                                              int (*generate_key) (DH *)))
DEPRECATEDIN_3_0(int (*DH_meth_get_compute_key(const DH_METHOD *dhm))
                                               (unsigned char *key,
                                               const BIGNUM *pub_key, DH *dh))
DEPRECATEDIN_3_0(int DH_meth_set_compute_key(DH_METHOD *dhm,
                                             int (*compute_key)
                                                (unsigned char *key,
                                                 const BIGNUM *pub_key,
                                                 DH *dh)))
DEPRECATEDIN_3_0(int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))
                                                  (const DH *, BIGNUM *,
                                                   const BIGNUM *,
                                                   const BIGNUM *,
                                                   const BIGNUM *, BN_CTX *,
                                                   BN_MONT_CTX *))
DEPRECATEDIN_3_0(int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
                                            int (*bn_mod_exp)
                                                (const DH *, BIGNUM *,
                                                 const BIGNUM *, const BIGNUM *,
                                                 const BIGNUM *, BN_CTX *,
                                                 BN_MONT_CTX *)))
DEPRECATEDIN_3_0(int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *))
DEPRECATEDIN_3_0(int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *)))
DEPRECATEDIN_3_0(int (*DH_meth_get_finish(const DH_METHOD *dhm)) (DH *))
DEPRECATEDIN_3_0(int DH_meth_set_finish(DH_METHOD *dhm, int (*finish) (DH *)))
DEPRECATEDIN_3_0(int (*DH_meth_get_generate_params(const DH_METHOD *dhm))
                                                       (DH *, int, int,
                                                        BN_GENCB *))
DEPRECATEDIN_3_0(int DH_meth_set_generate_params(DH_METHOD *dhm,
                                                 int (*generate_params)
                                                     (DH *, int, int,
                                                      BN_GENCB *)))

#  define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
                          EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)

#  define EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
                          EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, len, NULL)

#  define EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
                          EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL)

#  define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
                          EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)

#  define EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
                          EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)

#  define EVP_PKEY_CTX_set_dhx_rfc5114(ctx, gen) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
                          EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)

#  define EVP_PKEY_CTX_set_dh_nid(ctx, nid) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, \
                        EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN, \
                        EVP_PKEY_CTRL_DH_NID, nid, NULL)

int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad);

#  define EVP_PKEY_CTX_set_dh_kdf_type(ctx, kdf) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_DH_KDF_TYPE, kdf, NULL)

#  define EVP_PKEY_CTX_get_dh_kdf_type(ctx) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_DH_KDF_TYPE, -2, NULL)

#  define EVP_PKEY_CTX_set0_dh_kdf_oid(ctx, oid) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_DH_KDF_OID, 0, (void *)(oid))

#  define EVP_PKEY_CTX_get0_dh_kdf_oid(ctx, poid) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX,  EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_GET_DH_KDF_OID, 0, (void *)(poid))

#  define EVP_PKEY_CTX_set_dh_kdf_md(ctx, md) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_DH_KDF_MD, 0, (void *)(md))

#  define EVP_PKEY_CTX_get_dh_kdf_md(ctx, pmd) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_GET_DH_KDF_MD, 0, (void *)(pmd))

#  define EVP_PKEY_CTX_set_dh_kdf_outlen(ctx, len) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_DH_KDF_OUTLEN, len, NULL)

#  define EVP_PKEY_CTX_get_dh_kdf_outlen(ctx, plen) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN, 0, (void *)(plen))

#  define EVP_PKEY_CTX_set0_dh_kdf_ukm(ctx, p, plen) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX,  EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_DH_KDF_UKM, plen, (void *)(p))

#  define EVP_PKEY_CTX_get0_dh_kdf_ukm(ctx, p) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX,  EVP_PKEY_OP_DERIVE, \
                          EVP_PKEY_CTRL_GET_DH_KDF_UKM, 0, (void *)(p))

#  define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN     (EVP_PKEY_ALG_CTRL + 1)
#  define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR     (EVP_PKEY_ALG_CTRL + 2)
#  define EVP_PKEY_CTRL_DH_RFC5114                (EVP_PKEY_ALG_CTRL + 3)
#  define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN  (EVP_PKEY_ALG_CTRL + 4)
#  define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE          (EVP_PKEY_ALG_CTRL + 5)
#  define EVP_PKEY_CTRL_DH_KDF_TYPE               (EVP_PKEY_ALG_CTRL + 6)
#  define EVP_PKEY_CTRL_DH_KDF_MD                 (EVP_PKEY_ALG_CTRL + 7)
#  define EVP_PKEY_CTRL_GET_DH_KDF_MD             (EVP_PKEY_ALG_CTRL + 8)
#  define EVP_PKEY_CTRL_DH_KDF_OUTLEN             (EVP_PKEY_ALG_CTRL + 9)
#  define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN         (EVP_PKEY_ALG_CTRL + 10)
#  define EVP_PKEY_CTRL_DH_KDF_UKM                (EVP_PKEY_ALG_CTRL + 11)
#  define EVP_PKEY_CTRL_GET_DH_KDF_UKM            (EVP_PKEY_ALG_CTRL + 12)
#  define EVP_PKEY_CTRL_DH_KDF_OID                (EVP_PKEY_ALG_CTRL + 13)
#  define EVP_PKEY_CTRL_GET_DH_KDF_OID            (EVP_PKEY_ALG_CTRL + 14)
#  define EVP_PKEY_CTRL_DH_NID                    (EVP_PKEY_ALG_CTRL + 15)
#  define EVP_PKEY_CTRL_DH_PAD                    (EVP_PKEY_ALG_CTRL + 16)

/* KDF types */
#  define EVP_PKEY_DH_KDF_NONE                            1
#  ifndef OPENSSL_NO_CMS
#   define EVP_PKEY_DH_KDF_X9_42                          2
#  endif

#  ifdef  __cplusplus
}
#  endif
# endif
#endif
Commit	Line	Data
	1	/*
	2	* Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
	10	#ifndef OPENSSL_DH_H
	11	# define OPENSSL_DH_H
	12	# pragma once
	13
	14	# include <openssl/macros.h>
	15	# ifndef OPENSSL_NO_DEPRECATED_3_0
	16	# define HEADER_DH_H
	17	# endif
	18
	19	# include <openssl/opensslconf.h>
	20
	21	# ifndef OPENSSL_NO_DH
	22	# include <openssl/e_os2.h>
	23	# include <openssl/bio.h>
	24	# include <openssl/asn1.h>
	25	# include <openssl/types.h>
	26	# ifndef OPENSSL_NO_DEPRECATED_1_1_0
	27	# include <openssl/bn.h>
	28	# endif
	29	# include <openssl/dherr.h>
	30
	31	# ifdef __cplusplus
	32	extern "C" {
	33	# endif
	34
	35	# ifndef OPENSSL_DH_MAX_MODULUS_BITS
	36	# define OPENSSL_DH_MAX_MODULUS_BITS 10000
	37	# endif
	38
	39	# define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
	40
	41	# define DH_FLAG_CACHE_MONT_P 0x01
	42
	43	# ifndef OPENSSL_NO_DEPRECATED_1_1_0
	44	/*
	45	* Does nothing. Previously this switched off constant time behaviour.
	46	*/
	47	# define DH_FLAG_NO_EXP_CONSTTIME 0x00
	48	# endif
	49
	50	# ifndef OPENSSL_NO_DEPRECATED_3_0
	51	/*
	52	* If this flag is set the DH method is FIPS compliant and can be used in
	53	* FIPS mode. This is set in the validated module method. If an application
	54	* sets this flag in its own methods it is its responsibility to ensure the
	55	* result is compliant.
	56	*/
	57
	58	# define DH_FLAG_FIPS_METHOD 0x0400
	59
	60	/*
	61	* If this flag is set the operations normally disabled in FIPS mode are
	62	* permitted it is then the applications responsibility to ensure that the
	63	* usage is compliant.
	64	*/
	65
	66	# define DH_FLAG_NON_FIPS_ALLOW 0x0400
	67	# endif
	68
	69	/* Already defined in ossl_typ.h */
	70	/* typedef struct dh_st DH; */
	71	/* typedef struct dh_method DH_METHOD; */
	72
	73	DECLARE_ASN1_ITEM(DHparams)
	74
	75	# ifndef OPENSSL_NO_DEPRECATED_3_0
	76	# define DH_GENERATOR_2 2
	77	# define DH_GENERATOR_3 3
	78	# define DH_GENERATOR_5 5
	79
	80	/* DH_check error codes */
	81	/*
	82	* NB: These values must align with the equivalently named macros in
	83	* internal/ffc.h.
	84	*/
	85	# define DH_CHECK_P_NOT_PRIME 0x01
	86	# define DH_CHECK_P_NOT_SAFE_PRIME 0x02
	87	# define DH_UNABLE_TO_CHECK_GENERATOR 0x04
	88	# define DH_NOT_SUITABLE_GENERATOR 0x08
	89	# define DH_CHECK_Q_NOT_PRIME 0x10
	90	# define DH_CHECK_INVALID_Q_VALUE 0x20
	91	# define DH_CHECK_INVALID_J_VALUE 0x40
	92	# define DH_MODULUS_TOO_SMALL 0x80
	93	# define DH_MODULUS_TOO_LARGE 0x100
	94
	95	/* DH_check_pub_key error codes */
	96	# define DH_CHECK_PUBKEY_TOO_SMALL 0x01
	97	# define DH_CHECK_PUBKEY_TOO_LARGE 0x02
	98	# define DH_CHECK_PUBKEY_INVALID 0x04
	99
	100	/*
	101	* primes p where (p-1)/2 is prime too are called "safe"; we define this for
	102	* backward compatibility:
	103	*/
	104	# define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
	105
	106	/* DH parameter generation types used by EVP_PKEY_CTX_set_dh_paramgen_type() */
	107	# define DH_PARAMGEN_TYPE_GENERATOR 0 /* Use a generator g */
	108	# define DH_PARAMGEN_TYPE_FIPS_186_2 1 /* Use legacy FIPS186-2 standard */
	109	# define DH_PARAMGEN_TYPE_FIPS_186_4 2 /* Use FIPS186-4 standard */
	110
	111	# define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
	112
	113	# define d2i_DHparams_fp(fp, x) \
	114	(DH )ASN1_d2i_fp((char (*)())DH_new, \
	115	(char ()())d2i_DHparams, \
	116	(fp), \
	117	(unsigned char **)(x))
	118	# define i2d_DHparams_fp(fp, x) \
	119	ASN1_i2d_fp(i2d_DHparams,(fp), (unsigned char *)(x))
	120	# define d2i_DHparams_bio(bp, x) \
	121	ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, bp, x)
	122	# define i2d_DHparams_bio(bp, x) \
	123	ASN1_i2d_bio_of(DH, i2d_DHparams, bp, x)
	124
	125	# define d2i_DHxparams_fp(fp,x) \
	126	(DH )ASN1_d2i_fp((char (*)())DH_new, \
	127	(char ()())d2i_DHxparams, \
	128	(fp), \
	129	(unsigned char **)(x))
	130	# define i2d_DHxparams_fp(fp, x) \
	131	ASN1_i2d_fp(i2d_DHxparams,(fp), (unsigned char *)(x))
	132	# define d2i_DHxparams_bio(bp, x) \
	133	ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, bp, x)
	134	# define i2d_DHxparams_bio(bp, x) \
	135	ASN1_i2d_bio_of(DH, i2d_DHxparams, bp, x)
	136	# endif
	137
	138	DECLARE_ASN1_DUP_FUNCTION_name(DH, DHparams)
	139
	140	DEPRECATEDIN_3_0(const DH_METHOD *DH_OpenSSL(void))
	141
	142	DEPRECATEDIN_3_0(void DH_set_default_method(const DH_METHOD *meth))
	143	DEPRECATEDIN_3_0(const DH_METHOD *DH_get_default_method(void))
	144	DEPRECATEDIN_3_0(int DH_set_method(DH dh, const DH_METHOD meth))
	145	DEPRECATEDIN_3_0(DH DH_new_method(ENGINE engine))
	146
	147	DH *DH_new(void);
	148	void DH_free(DH *dh);
	149	int DH_up_ref(DH *dh);
	150	DEPRECATEDIN_3_0(int DH_bits(const DH *dh))
	151	DEPRECATEDIN_3_0(int DH_size(const DH *dh))
	152	DEPRECATEDIN_3_0(int DH_security_bits(const DH *dh))
	153	# ifndef OPENSSL_NO_DEPRECATED_3_0
	154	# define DH_get_ex_new_index(l, p, newf, dupf, freef) \
	155	CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, l, p, newf, dupf, freef)
	156	# endif
	157	DEPRECATEDIN_3_0(int DH_set_ex_data(DH d, int idx, void arg))
	158	DEPRECATEDIN_3_0(void DH_get_ex_data(DH d, int idx))
	159
	160	/* Deprecated version */
	161	DEPRECATEDIN_0_9_8(DH *DH_generate_parameters(int prime_len, int generator,
	162	void (*callback) (int, int,
	163	void *),
	164	void *cb_arg))
	165
	166	/* New version */
	167	DEPRECATEDIN_3_0(int DH_generate_parameters_ex(DH *dh, int prime_len,
	168	int generator, BN_GENCB *cb))
	169
	170	DEPRECATEDIN_3_0(int DH_check_params_ex(const DH *dh))
	171	DEPRECATEDIN_3_0(int DH_check_ex(const DH *dh))
	172	DEPRECATEDIN_3_0(int DH_check_pub_key_ex(const DH dh, const BIGNUM pub_key))
	173	/*
	174	* TODO(3.0): deprecate DH_check_params once ssl/statem/statem_clnt.c is fixed.
	175	*/
	176	int DH_check_params(const DH dh, int ret);
	177	DEPRECATEDIN_3_0(int DH_check(const DH dh, int codes))
	178	DEPRECATEDIN_3_0(int DH_check_pub_key(const DH dh, const BIGNUM pub_key,
	179	int *codes))
	180	DEPRECATEDIN_3_0(int DH_generate_key(DH *dh))
	181	DEPRECATEDIN_3_0(int DH_compute_key(unsigned char key, const BIGNUM pub_key,
	182	DH *dh))
	183	DEPRECATEDIN_3_0(int DH_compute_key_padded(unsigned char *key,
	184	const BIGNUM pub_key, DH dh))
	185	DECLARE_ASN1_ENCODE_FUNCTIONS_only(DH, DHparams)
	186	DECLARE_ASN1_ENCODE_FUNCTIONS_only(DH, DHxparams)
	187	# ifndef OPENSSL_NO_STDIO
	188	DEPRECATEDIN_3_0(int DHparams_print_fp(FILE fp, const DH x))
	189	# endif
	190	DEPRECATEDIN_3_0(int DHparams_print(BIO bp, const DH x))
	191
	192	/* RFC 5114 parameters */
	193	DH *DH_get_1024_160(void);
	194	DH *DH_get_2048_224(void);
	195	DH *DH_get_2048_256(void);
	196
	197	/* Named parameters, currently RFC7919 and RFC3526 */
	198	/* TODO(3.0): deprecate DH_new_by_nid() after converting ssl/s3_lib.c */
	199	DH *DH_new_by_nid(int nid);
	200	DEPRECATEDIN_3_0(int DH_get_nid(DH *dh))
	201
	202	# ifndef OPENSSL_NO_CMS
	203	/* RFC2631 KDF */
	204	DEPRECATEDIN_3_0(int DH_KDF_X9_42(unsigned char *out, size_t outlen,
	205	const unsigned char *Z, size_t Zlen,
	206	ASN1_OBJECT *key_oid,
	207	const unsigned char *ukm,
	208	size_t ukmlen, const EVP_MD *md))
	209	# endif
	210
	211	void DH_get0_pqg(const DH *dh,
	212	const BIGNUM p, const BIGNUM q, const BIGNUM **g);
	213	int DH_set0_pqg(DH dh, BIGNUM p, BIGNUM q, BIGNUM g);
	214	void DH_get0_key(const DH *dh,
	215	const BIGNUM pub_key, const BIGNUM priv_key);
	216	int DH_set0_key(DH dh, BIGNUM pub_key, BIGNUM *priv_key);
	217	const BIGNUM DH_get0_p(const DH dh);
	218	const BIGNUM DH_get0_q(const DH dh);
	219	const BIGNUM DH_get0_g(const DH dh);
	220	const BIGNUM DH_get0_priv_key(const DH dh);
	221	const BIGNUM DH_get0_pub_key(const DH dh);
	222	void DH_clear_flags(DH *dh, int flags);
	223	int DH_test_flags(const DH *dh, int flags);
	224	void DH_set_flags(DH *dh, int flags);
	225	DEPRECATEDIN_3_0(ENGINE DH_get0_engine(DH d))
	226	DEPRECATEDIN_3_0(long DH_get_length(const DH *dh))
	227	DEPRECATEDIN_3_0(int DH_set_length(DH *dh, long length))
	228
	229	DEPRECATEDIN_3_0(DH_METHOD DH_meth_new(const char name, int flags))
	230	DEPRECATEDIN_3_0(void DH_meth_free(DH_METHOD *dhm))
	231	DEPRECATEDIN_3_0(DH_METHOD DH_meth_dup(const DH_METHOD dhm))
	232	DEPRECATEDIN_3_0(const char DH_meth_get0_name(const DH_METHOD dhm))
	233	DEPRECATEDIN_3_0(int DH_meth_set1_name(DH_METHOD dhm, const char name))
	234	DEPRECATEDIN_3_0(int DH_meth_get_flags(const DH_METHOD *dhm))
	235	DEPRECATEDIN_3_0(int DH_meth_set_flags(DH_METHOD *dhm, int flags))
	236	DEPRECATEDIN_3_0(void DH_meth_get0_app_data(const DH_METHOD dhm))
	237	DEPRECATEDIN_3_0(int DH_meth_set0_app_data(DH_METHOD dhm, void app_data))
	238	DEPRECATEDIN_3_0(int (DH_meth_get_generate_key(const DH_METHOD dhm)) (DH *))
	239	DEPRECATEDIN_3_0(int DH_meth_set_generate_key(DH_METHOD *dhm,
	240	int (generate_key) (DH )))
	241	DEPRECATEDIN_3_0(int (DH_meth_get_compute_key(const DH_METHOD dhm))
	242	(unsigned char *key,
	243	const BIGNUM pub_key, DH dh))
	244	DEPRECATEDIN_3_0(int DH_meth_set_compute_key(DH_METHOD *dhm,
	245	int (*compute_key)
	246	(unsigned char *key,
	247	const BIGNUM *pub_key,
	248	DH *dh)))
	249	DEPRECATEDIN_3_0(int (DH_meth_get_bn_mod_exp(const DH_METHOD dhm))
	250	(const DH , BIGNUM ,
	251	const BIGNUM *,
	252	const BIGNUM *,
	253	const BIGNUM , BN_CTX ,
	254	BN_MONT_CTX *))
	255	DEPRECATEDIN_3_0(int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
	256	int (*bn_mod_exp)
	257	(const DH , BIGNUM ,
	258	const BIGNUM , const BIGNUM ,
	259	const BIGNUM , BN_CTX ,
	260	BN_MONT_CTX *)))
	261	DEPRECATEDIN_3_0(int (DH_meth_get_init(const DH_METHOD dhm))(DH *))
	262	DEPRECATEDIN_3_0(int DH_meth_set_init(DH_METHOD dhm, int (init)(DH *)))
	263	DEPRECATEDIN_3_0(int (DH_meth_get_finish(const DH_METHOD dhm)) (DH *))
	264	DEPRECATEDIN_3_0(int DH_meth_set_finish(DH_METHOD dhm, int (finish) (DH *)))
	265	DEPRECATEDIN_3_0(int (DH_meth_get_generate_params(const DH_METHOD dhm))
	266	(DH *, int, int,
	267	BN_GENCB *))
	268	DEPRECATEDIN_3_0(int DH_meth_set_generate_params(DH_METHOD *dhm,
	269	int (*generate_params)
	270	(DH *, int, int,
	271	BN_GENCB *)))
	272
	273	# define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
	274	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
	275	EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)
	276
	277	# define EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len) \
	278	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
	279	EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, len, NULL)
	280
	281	# define EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ) \
	282	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
	283	EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL)
	284
	285	# define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \
	286	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
	287	EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)
	288
	289	# define EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen) \
	290	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
	291	EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
	292
	293	# define EVP_PKEY_CTX_set_dhx_rfc5114(ctx, gen) \
	294	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
	295	EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
	296
	297	# define EVP_PKEY_CTX_set_dh_nid(ctx, nid) \
	298	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, \
	299	EVP_PKEY_OP_PARAMGEN \| EVP_PKEY_OP_KEYGEN, \
	300	EVP_PKEY_CTRL_DH_NID, nid, NULL)
	301
	302	int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad);
	303
	304	# define EVP_PKEY_CTX_set_dh_kdf_type(ctx, kdf) \
	305	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	306	EVP_PKEY_CTRL_DH_KDF_TYPE, kdf, NULL)
	307
	308	# define EVP_PKEY_CTX_get_dh_kdf_type(ctx) \
	309	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	310	EVP_PKEY_CTRL_DH_KDF_TYPE, -2, NULL)
	311
	312	# define EVP_PKEY_CTX_set0_dh_kdf_oid(ctx, oid) \
	313	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	314	EVP_PKEY_CTRL_DH_KDF_OID, 0, (void *)(oid))
	315
	316	# define EVP_PKEY_CTX_get0_dh_kdf_oid(ctx, poid) \
	317	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	318	EVP_PKEY_CTRL_GET_DH_KDF_OID, 0, (void *)(poid))
	319
	320	# define EVP_PKEY_CTX_set_dh_kdf_md(ctx, md) \
	321	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	322	EVP_PKEY_CTRL_DH_KDF_MD, 0, (void *)(md))
	323
	324	# define EVP_PKEY_CTX_get_dh_kdf_md(ctx, pmd) \
	325	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	326	EVP_PKEY_CTRL_GET_DH_KDF_MD, 0, (void *)(pmd))
	327
	328	# define EVP_PKEY_CTX_set_dh_kdf_outlen(ctx, len) \
	329	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	330	EVP_PKEY_CTRL_DH_KDF_OUTLEN, len, NULL)
	331
	332	# define EVP_PKEY_CTX_get_dh_kdf_outlen(ctx, plen) \
	333	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	334	EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN, 0, (void *)(plen))
	335
	336	# define EVP_PKEY_CTX_set0_dh_kdf_ukm(ctx, p, plen) \
	337	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	338	EVP_PKEY_CTRL_DH_KDF_UKM, plen, (void *)(p))
	339
	340	# define EVP_PKEY_CTX_get0_dh_kdf_ukm(ctx, p) \
	341	EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_DERIVE, \
	342	EVP_PKEY_CTRL_GET_DH_KDF_UKM, 0, (void *)(p))
	343
	344	# define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1)
	345	# define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2)
	346	# define EVP_PKEY_CTRL_DH_RFC5114 (EVP_PKEY_ALG_CTRL + 3)
	347	# define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN (EVP_PKEY_ALG_CTRL + 4)
	348	# define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE (EVP_PKEY_ALG_CTRL + 5)
	349	# define EVP_PKEY_CTRL_DH_KDF_TYPE (EVP_PKEY_ALG_CTRL + 6)
	350	# define EVP_PKEY_CTRL_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 7)
	351	# define EVP_PKEY_CTRL_GET_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 8)
	352	# define EVP_PKEY_CTRL_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 9)
	353	# define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 10)
	354	# define EVP_PKEY_CTRL_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 11)
	355	# define EVP_PKEY_CTRL_GET_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 12)
	356	# define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
	357	# define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
	358	# define EVP_PKEY_CTRL_DH_NID (EVP_PKEY_ALG_CTRL + 15)
	359	# define EVP_PKEY_CTRL_DH_PAD (EVP_PKEY_ALG_CTRL + 16)
	360
	361	/* KDF types */
	362	# define EVP_PKEY_DH_KDF_NONE 1
	363	# ifndef OPENSSL_NO_CMS
	364	# define EVP_PKEY_DH_KDF_X9_42 2
	365	# endif
	366
	367	# ifdef __cplusplus
	368	}
	369	# endif
	370	# endif
	371	#endif