| 1 | /*
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| 2 | * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #ifndef OPENSSL_DH_H
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| 11 | # define OPENSSL_DH_H
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| 12 | # pragma once
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| 13 |
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| 14 | # include <openssl/macros.h>
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| 15 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 16 | # define HEADER_DH_H
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| 17 | # endif
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| 18 |
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| 19 | # include <openssl/opensslconf.h>
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| 20 | # include <openssl/types.h>
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| 21 |
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| 22 | # ifdef __cplusplus
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| 23 | extern "C" {
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| 24 | # endif
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| 25 |
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| 26 | #include <stdlib.h>
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| 27 |
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| 28 | /* DH parameter generation types used by EVP_PKEY_CTX_set_dh_paramgen_type() */
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| 29 | # define DH_PARAMGEN_TYPE_GENERATOR 0 /* Use a safe prime generator */
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| 30 | # define DH_PARAMGEN_TYPE_FIPS_186_2 1 /* Use FIPS186-2 standard */
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| 31 | # define DH_PARAMGEN_TYPE_FIPS_186_4 2 /* Use FIPS186-4 standard */
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| 32 | # define DH_PARAMGEN_TYPE_GROUP 3 /* Use a named safe prime group */
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| 33 |
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| 34 | int EVP_PKEY_CTX_set_dh_paramgen_type(EVP_PKEY_CTX *ctx, int typ);
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| 35 | int EVP_PKEY_CTX_set_dh_paramgen_gindex(EVP_PKEY_CTX *ctx, int gindex);
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| 36 | int EVP_PKEY_CTX_set_dh_paramgen_seed(EVP_PKEY_CTX *ctx,
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| 37 | const unsigned char *seed,
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| 38 | size_t seedlen);
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| 39 | int EVP_PKEY_CTX_set_dh_paramgen_prime_len(EVP_PKEY_CTX *ctx, int pbits);
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| 40 | int EVP_PKEY_CTX_set_dh_paramgen_subprime_len(EVP_PKEY_CTX *ctx, int qlen);
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| 41 | int EVP_PKEY_CTX_set_dh_paramgen_generator(EVP_PKEY_CTX *ctx, int gen);
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| 42 | int EVP_PKEY_CTX_set_dh_nid(EVP_PKEY_CTX *ctx, int nid);
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| 43 | int EVP_PKEY_CTX_set_dh_rfc5114(EVP_PKEY_CTX *ctx, int gen);
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| 44 | int EVP_PKEY_CTX_set_dhx_rfc5114(EVP_PKEY_CTX *ctx, int gen);
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| 45 | int EVP_PKEY_CTX_set_dh_pad(EVP_PKEY_CTX *ctx, int pad);
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| 46 |
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| 47 | int EVP_PKEY_CTX_set_dh_kdf_type(EVP_PKEY_CTX *ctx, int kdf);
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| 48 | int EVP_PKEY_CTX_get_dh_kdf_type(EVP_PKEY_CTX *ctx);
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| 49 | int EVP_PKEY_CTX_set0_dh_kdf_oid(EVP_PKEY_CTX *ctx, ASN1_OBJECT *oid);
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| 50 | int EVP_PKEY_CTX_get0_dh_kdf_oid(EVP_PKEY_CTX *ctx, ASN1_OBJECT **oid);
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| 51 | int EVP_PKEY_CTX_set_dh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
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| 52 | int EVP_PKEY_CTX_get_dh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);
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| 53 | int EVP_PKEY_CTX_set_dh_kdf_outlen(EVP_PKEY_CTX *ctx, int len);
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| 54 | int EVP_PKEY_CTX_get_dh_kdf_outlen(EVP_PKEY_CTX *ctx, int *len);
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| 55 | int EVP_PKEY_CTX_set0_dh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm, int len);
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| 56 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 57 | OSSL_DEPRECATEDIN_3_0
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| 58 | int EVP_PKEY_CTX_get0_dh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **ukm);
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| 59 | #endif
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| 60 |
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| 61 | # define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1)
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| 62 | # define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2)
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| 63 | # define EVP_PKEY_CTRL_DH_RFC5114 (EVP_PKEY_ALG_CTRL + 3)
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| 64 | # define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN (EVP_PKEY_ALG_CTRL + 4)
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| 65 | # define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE (EVP_PKEY_ALG_CTRL + 5)
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| 66 | # define EVP_PKEY_CTRL_DH_KDF_TYPE (EVP_PKEY_ALG_CTRL + 6)
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| 67 | # define EVP_PKEY_CTRL_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 7)
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| 68 | # define EVP_PKEY_CTRL_GET_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 8)
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| 69 | # define EVP_PKEY_CTRL_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 9)
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| 70 | # define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 10)
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| 71 | # define EVP_PKEY_CTRL_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 11)
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| 72 | # define EVP_PKEY_CTRL_GET_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 12)
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| 73 | # define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
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| 74 | # define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
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| 75 | # define EVP_PKEY_CTRL_DH_NID (EVP_PKEY_ALG_CTRL + 15)
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| 76 | # define EVP_PKEY_CTRL_DH_PAD (EVP_PKEY_ALG_CTRL + 16)
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| 77 |
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| 78 | /* KDF types */
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| 79 | # define EVP_PKEY_DH_KDF_NONE 1
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| 80 | # define EVP_PKEY_DH_KDF_X9_42 2
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| 81 |
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| 82 | # ifndef OPENSSL_NO_DH
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| 83 | # include <openssl/e_os2.h>
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| 84 | # include <openssl/bio.h>
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| 85 | # include <openssl/asn1.h>
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| 86 | # ifndef OPENSSL_NO_DEPRECATED_1_1_0
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| 87 | # include <openssl/bn.h>
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| 88 | # endif
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| 89 | # include <openssl/dherr.h>
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| 90 |
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| 91 | # ifndef OPENSSL_DH_MAX_MODULUS_BITS
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| 92 | # define OPENSSL_DH_MAX_MODULUS_BITS 10000
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| 93 | # endif
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| 94 |
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| 95 | # define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
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| 96 |
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| 97 | # define DH_FLAG_CACHE_MONT_P 0x01
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| 98 |
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| 99 | # define DH_FLAG_TYPE_MASK 0xF000
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| 100 | # define DH_FLAG_TYPE_DH 0x0000
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| 101 | # define DH_FLAG_TYPE_DHX 0x1000
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| 102 |
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| 103 | # ifndef OPENSSL_NO_DEPRECATED_1_1_0
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| 104 | /*
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| 105 | * Does nothing. Previously this switched off constant time behaviour.
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| 106 | */
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| 107 | # define DH_FLAG_NO_EXP_CONSTTIME 0x00
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| 108 | # endif
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| 109 |
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| 110 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 111 | /*
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| 112 | * If this flag is set the DH method is FIPS compliant and can be used in
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| 113 | * FIPS mode. This is set in the validated module method. If an application
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| 114 | * sets this flag in its own methods it is its responsibility to ensure the
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| 115 | * result is compliant.
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| 116 | */
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| 117 |
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| 118 | # define DH_FLAG_FIPS_METHOD 0x0400
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| 119 |
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| 120 | /*
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| 121 | * If this flag is set the operations normally disabled in FIPS mode are
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| 122 | * permitted it is then the applications responsibility to ensure that the
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| 123 | * usage is compliant.
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| 124 | */
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| 125 |
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| 126 | # define DH_FLAG_NON_FIPS_ALLOW 0x0400
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| 127 | # endif
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| 128 |
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| 129 | /* Already defined in ossl_typ.h */
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| 130 | /* typedef struct dh_st DH; */
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| 131 | /* typedef struct dh_method DH_METHOD; */
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| 132 |
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| 133 | DECLARE_ASN1_ITEM(DHparams)
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| 134 |
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| 135 | # ifndef OPENSSL_NO_DEPRECATED_3_0
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| 136 | # define DH_GENERATOR_2 2
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| 137 | # define DH_GENERATOR_3 3
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| 138 | # define DH_GENERATOR_5 5
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| 139 |
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| 140 | /* DH_check error codes */
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| 141 | /*
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| 142 | * NB: These values must align with the equivalently named macros in
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| 143 | * internal/ffc.h.
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| 144 | */
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| 145 | # define DH_CHECK_P_NOT_PRIME 0x01
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| 146 | # define DH_CHECK_P_NOT_SAFE_PRIME 0x02
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| 147 | # define DH_UNABLE_TO_CHECK_GENERATOR 0x04
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| 148 | # define DH_NOT_SUITABLE_GENERATOR 0x08
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| 149 | # define DH_CHECK_Q_NOT_PRIME 0x10
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| 150 | # define DH_CHECK_INVALID_Q_VALUE 0x20
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| 151 | # define DH_CHECK_INVALID_J_VALUE 0x40
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| 152 | # define DH_MODULUS_TOO_SMALL 0x80
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| 153 | # define DH_MODULUS_TOO_LARGE 0x100
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| 154 |
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| 155 | /* DH_check_pub_key error codes */
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| 156 | # define DH_CHECK_PUBKEY_TOO_SMALL 0x01
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| 157 | # define DH_CHECK_PUBKEY_TOO_LARGE 0x02
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| 158 | # define DH_CHECK_PUBKEY_INVALID 0x04
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| 159 |
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| 160 | /*
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| 161 | * primes p where (p-1)/2 is prime too are called "safe"; we define this for
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| 162 | * backward compatibility:
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| 163 | */
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| 164 | # define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
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| 165 |
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| 166 | # define d2i_DHparams_fp(fp, x) \
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| 167 | (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
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| 168 | (char *(*)())d2i_DHparams, \
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| 169 | (fp), \
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| 170 | (unsigned char **)(x))
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| 171 | # define i2d_DHparams_fp(fp, x) \
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| 172 | ASN1_i2d_fp(i2d_DHparams,(fp), (unsigned char *)(x))
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| 173 | # define d2i_DHparams_bio(bp, x) \
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| 174 | ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, bp, x)
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| 175 | # define i2d_DHparams_bio(bp, x) \
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| 176 | ASN1_i2d_bio_of(DH, i2d_DHparams, bp, x)
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| 177 |
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| 178 | # define d2i_DHxparams_fp(fp,x) \
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| 179 | (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
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| 180 | (char *(*)())d2i_DHxparams, \
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| 181 | (fp), \
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| 182 | (unsigned char **)(x))
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| 183 | # define i2d_DHxparams_fp(fp, x) \
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| 184 | ASN1_i2d_fp(i2d_DHxparams,(fp), (unsigned char *)(x))
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| 185 | # define d2i_DHxparams_bio(bp, x) \
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| 186 | ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, bp, x)
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| 187 | # define i2d_DHxparams_bio(bp, x) \
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| 188 | ASN1_i2d_bio_of(DH, i2d_DHxparams, bp, x)
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| 189 |
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| 190 | DECLARE_ASN1_DUP_FUNCTION_name_attr(OSSL_DEPRECATEDIN_3_0, DH, DHparams)
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| 191 |
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| 192 | OSSL_DEPRECATEDIN_3_0 const DH_METHOD *DH_OpenSSL(void);
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| 193 |
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| 194 | OSSL_DEPRECATEDIN_3_0 void DH_set_default_method(const DH_METHOD *meth);
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| 195 | OSSL_DEPRECATEDIN_3_0 const DH_METHOD *DH_get_default_method(void);
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| 196 | OSSL_DEPRECATEDIN_3_0 int DH_set_method(DH *dh, const DH_METHOD *meth);
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| 197 | OSSL_DEPRECATEDIN_3_0 DH *DH_new_method(ENGINE *engine);
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| 198 |
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| 199 | OSSL_DEPRECATEDIN_3_0 DH *DH_new(void);
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| 200 | OSSL_DEPRECATEDIN_3_0 void DH_free(DH *dh);
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| 201 | OSSL_DEPRECATEDIN_3_0 int DH_up_ref(DH *dh);
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| 202 | OSSL_DEPRECATEDIN_3_0 int DH_bits(const DH *dh);
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| 203 | OSSL_DEPRECATEDIN_3_0 int DH_size(const DH *dh);
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| 204 | OSSL_DEPRECATEDIN_3_0 int DH_security_bits(const DH *dh);
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| 205 |
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| 206 | # define DH_get_ex_new_index(l, p, newf, dupf, freef) \
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| 207 | CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, l, p, newf, dupf, freef)
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| 208 |
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| 209 | OSSL_DEPRECATEDIN_3_0 int DH_set_ex_data(DH *d, int idx, void *arg);
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| 210 | OSSL_DEPRECATEDIN_3_0 void *DH_get_ex_data(const DH *d, int idx);
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| 211 |
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| 212 | OSSL_DEPRECATEDIN_3_0 int DH_generate_parameters_ex(DH *dh, int prime_len,
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| 213 | int generator,
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| 214 | BN_GENCB *cb);
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| 215 |
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| 216 | OSSL_DEPRECATEDIN_3_0 int DH_check_params_ex(const DH *dh);
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| 217 | OSSL_DEPRECATEDIN_3_0 int DH_check_ex(const DH *dh);
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| 218 | OSSL_DEPRECATEDIN_3_0 int DH_check_pub_key_ex(const DH *dh, const BIGNUM *pub_key);
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| 219 | OSSL_DEPRECATEDIN_3_0 int DH_check_params(const DH *dh, int *ret);
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| 220 | OSSL_DEPRECATEDIN_3_0 int DH_check(const DH *dh, int *codes);
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| 221 | OSSL_DEPRECATEDIN_3_0 int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key,
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| 222 | int *codes);
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| 223 | OSSL_DEPRECATEDIN_3_0 int DH_generate_key(DH *dh);
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| 224 | OSSL_DEPRECATEDIN_3_0 int DH_compute_key(unsigned char *key,
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| 225 | const BIGNUM *pub_key, DH *dh);
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| 226 | OSSL_DEPRECATEDIN_3_0 int DH_compute_key_padded(unsigned char *key,
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| 227 | const BIGNUM *pub_key, DH *dh);
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| 228 |
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| 229 | DECLARE_ASN1_ENCODE_FUNCTIONS_only_attr(OSSL_DEPRECATEDIN_3_0, DH, DHparams)
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| 230 | DECLARE_ASN1_ENCODE_FUNCTIONS_only_attr(OSSL_DEPRECATEDIN_3_0, DH, DHxparams)
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| 231 |
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| 232 | # ifndef OPENSSL_NO_STDIO
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| 233 | OSSL_DEPRECATEDIN_3_0 int DHparams_print_fp(FILE *fp, const DH *x);
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| 234 | # endif
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| 235 | OSSL_DEPRECATEDIN_3_0 int DHparams_print(BIO *bp, const DH *x);
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| 236 |
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| 237 | /* RFC 5114 parameters */
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| 238 | OSSL_DEPRECATEDIN_3_0 DH *DH_get_1024_160(void);
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| 239 | OSSL_DEPRECATEDIN_3_0 DH *DH_get_2048_224(void);
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| 240 | OSSL_DEPRECATEDIN_3_0 DH *DH_get_2048_256(void);
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| 241 |
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| 242 | /* Named parameters, currently RFC7919 and RFC3526 */
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| 243 | OSSL_DEPRECATEDIN_3_0 DH *DH_new_by_nid(int nid);
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| 244 | OSSL_DEPRECATEDIN_3_0 int DH_get_nid(const DH *dh);
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| 245 |
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| 246 | /* RFC2631 KDF */
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| 247 | OSSL_DEPRECATEDIN_3_0 int DH_KDF_X9_42(unsigned char *out, size_t outlen,
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| 248 | const unsigned char *Z, size_t Zlen,
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| 249 | ASN1_OBJECT *key_oid,
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| 250 | const unsigned char *ukm,
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| 251 | size_t ukmlen, const EVP_MD *md);
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| 252 |
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| 253 | OSSL_DEPRECATEDIN_3_0 void DH_get0_pqg(const DH *dh, const BIGNUM **p,
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| 254 | const BIGNUM **q, const BIGNUM **g);
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| 255 | OSSL_DEPRECATEDIN_3_0 int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
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| 256 | OSSL_DEPRECATEDIN_3_0 void DH_get0_key(const DH *dh, const BIGNUM **pub_key,
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| 257 | const BIGNUM **priv_key);
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| 258 | OSSL_DEPRECATEDIN_3_0 int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
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| 259 | OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_p(const DH *dh);
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| 260 | OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_q(const DH *dh);
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| 261 | OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_g(const DH *dh);
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| 262 | OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_priv_key(const DH *dh);
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| 263 | OSSL_DEPRECATEDIN_3_0 const BIGNUM *DH_get0_pub_key(const DH *dh);
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| 264 | OSSL_DEPRECATEDIN_3_0 void DH_clear_flags(DH *dh, int flags);
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| 265 | OSSL_DEPRECATEDIN_3_0 int DH_test_flags(const DH *dh, int flags);
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| 266 | OSSL_DEPRECATEDIN_3_0 void DH_set_flags(DH *dh, int flags);
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| 267 | OSSL_DEPRECATEDIN_3_0 ENGINE *DH_get0_engine(DH *d);
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| 268 | OSSL_DEPRECATEDIN_3_0 long DH_get_length(const DH *dh);
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| 269 | OSSL_DEPRECATEDIN_3_0 int DH_set_length(DH *dh, long length);
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| 270 |
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| 271 | OSSL_DEPRECATEDIN_3_0 DH_METHOD *DH_meth_new(const char *name, int flags);
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| 272 | OSSL_DEPRECATEDIN_3_0 void DH_meth_free(DH_METHOD *dhm);
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| 273 | OSSL_DEPRECATEDIN_3_0 DH_METHOD *DH_meth_dup(const DH_METHOD *dhm);
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| 274 | OSSL_DEPRECATEDIN_3_0 const char *DH_meth_get0_name(const DH_METHOD *dhm);
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| 275 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set1_name(DH_METHOD *dhm, const char *name);
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| 276 | OSSL_DEPRECATEDIN_3_0 int DH_meth_get_flags(const DH_METHOD *dhm);
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| 277 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_flags(DH_METHOD *dhm, int flags);
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| 278 | OSSL_DEPRECATEDIN_3_0 void *DH_meth_get0_app_data(const DH_METHOD *dhm);
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| 279 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data);
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| 280 | OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_generate_key(const DH_METHOD *dhm)) (DH *);
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| 281 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_generate_key(DH_METHOD *dhm,
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| 282 | int (*generate_key) (DH *));
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| 283 | OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_compute_key(const DH_METHOD *dhm))
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| 284 | (unsigned char *key,
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| 285 | const BIGNUM *pub_key,
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| 286 | DH *dh);
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| 287 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_compute_key(DH_METHOD *dhm,
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| 288 | int (*compute_key)
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| 289 | (unsigned char *key,
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| 290 | const BIGNUM *pub_key,
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| 291 | DH *dh));
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| 292 | OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))
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| 293 | (const DH *, BIGNUM *,
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| 294 | const BIGNUM *,
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| 295 | const BIGNUM *,
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| 296 | const BIGNUM *, BN_CTX *,
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| 297 | BN_MONT_CTX *);
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| 298 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
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| 299 | int (*bn_mod_exp)
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| 300 | (const DH *, BIGNUM *,
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| 301 | const BIGNUM *, const BIGNUM *,
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| 302 | const BIGNUM *, BN_CTX *,
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| 303 | BN_MONT_CTX *));
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| 304 | OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *);
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| 305 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *));
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| 306 | OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_finish(const DH_METHOD *dhm)) (DH *);
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| 307 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_finish(DH_METHOD *dhm, int (*finish) (DH *));
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| 308 | OSSL_DEPRECATEDIN_3_0 int (*DH_meth_get_generate_params(const DH_METHOD *dhm))
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| 309 | (DH *, int, int,
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| 310 | BN_GENCB *);
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| 311 | OSSL_DEPRECATEDIN_3_0 int DH_meth_set_generate_params(DH_METHOD *dhm,
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| 312 | int (*generate_params)
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| 313 | (DH *, int, int,
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| 314 | BN_GENCB *));
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| 315 | # endif /* OPENSSL_NO_DEPRECATED_3_0 */
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| 316 |
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| 317 | # ifndef OPENSSL_NO_DEPRECATED_0_9_8
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| 318 | OSSL_DEPRECATEDIN_0_9_8 DH *DH_generate_parameters(int prime_len, int generator,
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| 319 | void (*callback) (int, int,
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| 320 | void *),
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| 321 | void *cb_arg);
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| 322 | # endif
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| 323 |
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| 324 | # endif
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| 325 | # ifdef __cplusplus
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| 326 | }
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| 327 | # endif
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| 328 | #endif
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