1 | /*
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2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (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 HEADER_DH_H
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11 | # define HEADER_DH_H
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12 |
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13 | # include <openssl/opensslconf.h>
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14 |
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15 | # ifndef OPENSSL_NO_DH
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16 | # include <openssl/e_os2.h>
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17 | # include <openssl/bio.h>
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18 | # include <openssl/asn1.h>
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19 | # include <openssl/ossl_typ.h>
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20 | # if OPENSSL_API_COMPAT < 0x10100000L
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21 | # include <openssl/bn.h>
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22 | # endif
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23 |
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24 | # ifdef __cplusplus
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25 | extern "C" {
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26 | # endif
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27 |
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28 | # ifndef OPENSSL_DH_MAX_MODULUS_BITS
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29 | # define OPENSSL_DH_MAX_MODULUS_BITS 10000
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30 | # endif
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31 |
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32 | # define OPENSSL_DH_FIPS_MIN_MODULUS_BITS 1024
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33 |
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34 | # define DH_FLAG_CACHE_MONT_P 0x01
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35 |
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36 | # if OPENSSL_API_COMPAT < 0x10100000L
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37 | /*
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38 | * Does nothing. Previously this switched off constant time behaviour.
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39 | */
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40 | # define DH_FLAG_NO_EXP_CONSTTIME 0x00
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41 | # endif
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42 |
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43 | /*
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44 | * If this flag is set the DH method is FIPS compliant and can be used in
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45 | * FIPS mode. This is set in the validated module method. If an application
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46 | * sets this flag in its own methods it is its responsibility to ensure the
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47 | * result is compliant.
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48 | */
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49 |
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50 | # define DH_FLAG_FIPS_METHOD 0x0400
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51 |
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52 | /*
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53 | * If this flag is set the operations normally disabled in FIPS mode are
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54 | * permitted it is then the applications responsibility to ensure that the
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55 | * usage is compliant.
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56 | */
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57 |
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58 | # define DH_FLAG_NON_FIPS_ALLOW 0x0400
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59 |
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60 | /* Already defined in ossl_typ.h */
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61 | /* typedef struct dh_st DH; */
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62 | /* typedef struct dh_method DH_METHOD; */
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63 |
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64 | DECLARE_ASN1_ITEM(DHparams)
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65 |
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66 | # define DH_GENERATOR_2 2
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67 | /* #define DH_GENERATOR_3 3 */
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68 | # define DH_GENERATOR_5 5
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69 |
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70 | /* DH_check error codes */
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71 | # define DH_CHECK_P_NOT_PRIME 0x01
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72 | # define DH_CHECK_P_NOT_SAFE_PRIME 0x02
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73 | # define DH_UNABLE_TO_CHECK_GENERATOR 0x04
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74 | # define DH_NOT_SUITABLE_GENERATOR 0x08
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75 | # define DH_CHECK_Q_NOT_PRIME 0x10
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76 | # define DH_CHECK_INVALID_Q_VALUE 0x20
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77 | # define DH_CHECK_INVALID_J_VALUE 0x40
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78 |
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79 | /* DH_check_pub_key error codes */
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80 | # define DH_CHECK_PUBKEY_TOO_SMALL 0x01
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81 | # define DH_CHECK_PUBKEY_TOO_LARGE 0x02
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82 | # define DH_CHECK_PUBKEY_INVALID 0x04
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83 |
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84 | /*
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85 | * primes p where (p-1)/2 is prime too are called "safe"; we define this for
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86 | * backward compatibility:
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87 | */
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88 | # define DH_CHECK_P_NOT_STRONG_PRIME DH_CHECK_P_NOT_SAFE_PRIME
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89 |
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90 | # define d2i_DHparams_fp(fp,x) (DH *)ASN1_d2i_fp((char *(*)())DH_new, \
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91 | (char *(*)())d2i_DHparams,(fp),(unsigned char **)(x))
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92 | # define i2d_DHparams_fp(fp,x) ASN1_i2d_fp(i2d_DHparams,(fp), \
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93 | (unsigned char *)(x))
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94 | # define d2i_DHparams_bio(bp,x) ASN1_d2i_bio_of(DH,DH_new,d2i_DHparams,bp,x)
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95 | # define i2d_DHparams_bio(bp,x) ASN1_i2d_bio_of_const(DH,i2d_DHparams,bp,x)
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96 |
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97 | DH *DHparams_dup(DH *);
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98 |
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99 | const DH_METHOD *DH_OpenSSL(void);
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100 |
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101 | void DH_set_default_method(const DH_METHOD *meth);
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102 | const DH_METHOD *DH_get_default_method(void);
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103 | int DH_set_method(DH *dh, const DH_METHOD *meth);
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104 | DH *DH_new_method(ENGINE *engine);
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105 |
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106 | DH *DH_new(void);
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107 | void DH_free(DH *dh);
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108 | int DH_up_ref(DH *dh);
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109 | int DH_bits(const DH *dh);
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110 | int DH_size(const DH *dh);
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111 | int DH_security_bits(const DH *dh);
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112 | #define DH_get_ex_new_index(l, p, newf, dupf, freef) \
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113 | CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, l, p, newf, dupf, freef)
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114 | int DH_set_ex_data(DH *d, int idx, void *arg);
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115 | void *DH_get_ex_data(DH *d, int idx);
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116 |
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117 | /* Deprecated version */
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118 | DEPRECATEDIN_0_9_8(DH *DH_generate_parameters(int prime_len, int generator,
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119 | void (*callback) (int, int,
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120 | void *),
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121 | void *cb_arg))
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122 |
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123 | /* New version */
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124 | int DH_generate_parameters_ex(DH *dh, int prime_len, int generator,
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125 | BN_GENCB *cb);
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126 |
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127 | int DH_check_params(const DH *dh, int *ret);
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128 | int DH_check(const DH *dh, int *codes);
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129 | int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *codes);
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130 | int DH_generate_key(DH *dh);
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131 | int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh);
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132 | int DH_compute_key_padded(unsigned char *key, const BIGNUM *pub_key, DH *dh);
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133 | DH *d2i_DHparams(DH **a, const unsigned char **pp, long length);
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134 | int i2d_DHparams(const DH *a, unsigned char **pp);
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135 | DH *d2i_DHxparams(DH **a, const unsigned char **pp, long length);
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136 | int i2d_DHxparams(const DH *a, unsigned char **pp);
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137 | # ifndef OPENSSL_NO_STDIO
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138 | int DHparams_print_fp(FILE *fp, const DH *x);
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139 | # endif
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140 | int DHparams_print(BIO *bp, const DH *x);
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141 |
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142 | /* RFC 5114 parameters */
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143 | DH *DH_get_1024_160(void);
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144 | DH *DH_get_2048_224(void);
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145 | DH *DH_get_2048_256(void);
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146 |
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147 | # ifndef OPENSSL_NO_CMS
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148 | /* RFC2631 KDF */
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149 | int DH_KDF_X9_42(unsigned char *out, size_t outlen,
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150 | const unsigned char *Z, size_t Zlen,
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151 | ASN1_OBJECT *key_oid,
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152 | const unsigned char *ukm, size_t ukmlen, const EVP_MD *md);
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153 | # endif
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154 |
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155 | void DH_get0_pqg(const DH *dh,
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156 | const BIGNUM **p, const BIGNUM **q, const BIGNUM **g);
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157 | int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g);
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158 | void DH_get0_key(const DH *dh,
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159 | const BIGNUM **pub_key, const BIGNUM **priv_key);
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160 | int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key);
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161 | void DH_clear_flags(DH *dh, int flags);
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162 | int DH_test_flags(const DH *dh, int flags);
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163 | void DH_set_flags(DH *dh, int flags);
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164 | ENGINE *DH_get0_engine(DH *d);
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165 | long DH_get_length(const DH *dh);
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166 | int DH_set_length(DH *dh, long length);
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167 |
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168 | DH_METHOD *DH_meth_new(const char *name, int flags);
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169 | void DH_meth_free(DH_METHOD *dhm);
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170 | DH_METHOD *DH_meth_dup(const DH_METHOD *dhm);
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171 | const char *DH_meth_get0_name(const DH_METHOD *dhm);
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172 | int DH_meth_set1_name(DH_METHOD *dhm, const char *name);
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173 | int DH_meth_get_flags(DH_METHOD *dhm);
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174 | int DH_meth_set_flags(DH_METHOD *dhm, int flags);
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175 | void *DH_meth_get0_app_data(const DH_METHOD *dhm);
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176 | int DH_meth_set0_app_data(DH_METHOD *dhm, void *app_data);
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177 | int (*DH_meth_get_generate_key(const DH_METHOD *dhm)) (DH *);
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178 | int DH_meth_set_generate_key(DH_METHOD *dhm, int (*generate_key) (DH *));
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179 | int (*DH_meth_get_compute_key(const DH_METHOD *dhm))
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180 | (unsigned char *key, const BIGNUM *pub_key, DH *dh);
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181 | int DH_meth_set_compute_key(DH_METHOD *dhm,
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182 | int (*compute_key) (unsigned char *key, const BIGNUM *pub_key, DH *dh));
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183 | int (*DH_meth_get_bn_mod_exp(const DH_METHOD *dhm))
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184 | (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *, const BIGNUM *,
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185 | BN_CTX *, BN_MONT_CTX *);
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186 | int DH_meth_set_bn_mod_exp(DH_METHOD *dhm,
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187 | int (*bn_mod_exp) (const DH *, BIGNUM *, const BIGNUM *, const BIGNUM *,
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188 | const BIGNUM *, BN_CTX *, BN_MONT_CTX *));
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189 | int (*DH_meth_get_init(const DH_METHOD *dhm))(DH *);
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190 | int DH_meth_set_init(DH_METHOD *dhm, int (*init)(DH *));
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191 | int (*DH_meth_get_finish(const DH_METHOD *dhm)) (DH *);
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192 | int DH_meth_set_finish(DH_METHOD *dhm, int (*finish) (DH *));
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193 | int (*DH_meth_get_generate_params(const DH_METHOD *dhm))
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194 | (DH *, int, int, BN_GENCB *);
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195 | int DH_meth_set_generate_params(DH_METHOD *dhm,
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196 | int (*generate_params) (DH *, int, int, BN_GENCB *));
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197 |
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198 |
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199 | # define EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len) \
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200 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
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201 | EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, len, NULL)
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202 |
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203 | # define EVP_PKEY_CTX_set_dh_paramgen_subprime_len(ctx, len) \
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204 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
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205 | EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, len, NULL)
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206 |
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207 | # define EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ) \
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208 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
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209 | EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL)
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210 |
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211 | # define EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, gen) \
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212 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN, \
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213 | EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL)
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214 |
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215 | # define EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen) \
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216 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
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217 | EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
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218 |
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219 | # define EVP_PKEY_CTX_set_dhx_rfc5114(ctx, gen) \
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220 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN, \
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221 | EVP_PKEY_CTRL_DH_RFC5114, gen, NULL)
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222 |
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223 | # define EVP_PKEY_CTX_set_dh_kdf_type(ctx, kdf) \
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224 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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225 | EVP_PKEY_OP_DERIVE, \
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226 | EVP_PKEY_CTRL_DH_KDF_TYPE, kdf, NULL)
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227 |
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228 | # define EVP_PKEY_CTX_get_dh_kdf_type(ctx) \
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229 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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230 | EVP_PKEY_OP_DERIVE, \
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231 | EVP_PKEY_CTRL_DH_KDF_TYPE, -2, NULL)
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232 |
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233 | # define EVP_PKEY_CTX_set0_dh_kdf_oid(ctx, oid) \
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234 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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235 | EVP_PKEY_OP_DERIVE, \
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236 | EVP_PKEY_CTRL_DH_KDF_OID, 0, (void *)oid)
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237 |
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238 | # define EVP_PKEY_CTX_get0_dh_kdf_oid(ctx, poid) \
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239 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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240 | EVP_PKEY_OP_DERIVE, \
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241 | EVP_PKEY_CTRL_GET_DH_KDF_OID, 0, (void *)poid)
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242 |
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243 | # define EVP_PKEY_CTX_set_dh_kdf_md(ctx, md) \
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244 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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245 | EVP_PKEY_OP_DERIVE, \
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246 | EVP_PKEY_CTRL_DH_KDF_MD, 0, (void *)md)
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247 |
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248 | # define EVP_PKEY_CTX_get_dh_kdf_md(ctx, pmd) \
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249 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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250 | EVP_PKEY_OP_DERIVE, \
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251 | EVP_PKEY_CTRL_GET_DH_KDF_MD, 0, (void *)pmd)
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252 |
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253 | # define EVP_PKEY_CTX_set_dh_kdf_outlen(ctx, len) \
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254 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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255 | EVP_PKEY_OP_DERIVE, \
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256 | EVP_PKEY_CTRL_DH_KDF_OUTLEN, len, NULL)
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257 |
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258 | # define EVP_PKEY_CTX_get_dh_kdf_outlen(ctx, plen) \
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259 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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260 | EVP_PKEY_OP_DERIVE, \
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261 | EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN, 0, (void *)plen)
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262 |
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263 | # define EVP_PKEY_CTX_set0_dh_kdf_ukm(ctx, p, plen) \
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264 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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265 | EVP_PKEY_OP_DERIVE, \
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266 | EVP_PKEY_CTRL_DH_KDF_UKM, plen, (void *)p)
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267 |
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268 | # define EVP_PKEY_CTX_get0_dh_kdf_ukm(ctx, p) \
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269 | EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, \
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270 | EVP_PKEY_OP_DERIVE, \
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271 | EVP_PKEY_CTRL_GET_DH_KDF_UKM, 0, (void *)p)
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272 |
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273 | # define EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN (EVP_PKEY_ALG_CTRL + 1)
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274 | # define EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR (EVP_PKEY_ALG_CTRL + 2)
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275 | # define EVP_PKEY_CTRL_DH_RFC5114 (EVP_PKEY_ALG_CTRL + 3)
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276 | # define EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN (EVP_PKEY_ALG_CTRL + 4)
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277 | # define EVP_PKEY_CTRL_DH_PARAMGEN_TYPE (EVP_PKEY_ALG_CTRL + 5)
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278 | # define EVP_PKEY_CTRL_DH_KDF_TYPE (EVP_PKEY_ALG_CTRL + 6)
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279 | # define EVP_PKEY_CTRL_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 7)
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280 | # define EVP_PKEY_CTRL_GET_DH_KDF_MD (EVP_PKEY_ALG_CTRL + 8)
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281 | # define EVP_PKEY_CTRL_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 9)
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282 | # define EVP_PKEY_CTRL_GET_DH_KDF_OUTLEN (EVP_PKEY_ALG_CTRL + 10)
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283 | # define EVP_PKEY_CTRL_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 11)
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284 | # define EVP_PKEY_CTRL_GET_DH_KDF_UKM (EVP_PKEY_ALG_CTRL + 12)
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285 | # define EVP_PKEY_CTRL_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 13)
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286 | # define EVP_PKEY_CTRL_GET_DH_KDF_OID (EVP_PKEY_ALG_CTRL + 14)
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287 |
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288 | /* KDF types */
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289 | # define EVP_PKEY_DH_KDF_NONE 1
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290 | # ifndef OPENSSL_NO_CMS
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291 | # define EVP_PKEY_DH_KDF_X9_42 2
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292 | # endif
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293 |
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294 | /* BEGIN ERROR CODES */
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295 | /*
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296 | * The following lines are auto generated by the script mkerr.pl. Any changes
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297 | * made after this point may be overwritten when the script is next run.
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298 | */
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299 |
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300 | int ERR_load_DH_strings(void);
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301 |
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302 | /* Error codes for the DH functions. */
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303 |
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304 | /* Function codes. */
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305 | # define DH_F_COMPUTE_KEY 102
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306 | # define DH_F_DHPARAMS_PRINT_FP 101
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307 | # define DH_F_DH_BUILTIN_GENPARAMS 106
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308 | # define DH_F_DH_CMS_DECRYPT 114
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309 | # define DH_F_DH_CMS_SET_PEERKEY 115
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310 | # define DH_F_DH_CMS_SET_SHARED_INFO 116
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311 | # define DH_F_DH_METH_DUP 117
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312 | # define DH_F_DH_METH_NEW 118
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313 | # define DH_F_DH_METH_SET1_NAME 119
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314 | # define DH_F_DH_NEW_METHOD 105
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315 | # define DH_F_DH_PARAM_DECODE 107
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316 | # define DH_F_DH_PRIV_DECODE 110
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317 | # define DH_F_DH_PRIV_ENCODE 111
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318 | # define DH_F_DH_PUB_DECODE 108
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319 | # define DH_F_DH_PUB_ENCODE 109
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320 | # define DH_F_DO_DH_PRINT 100
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321 | # define DH_F_GENERATE_KEY 103
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322 | # define DH_F_PKEY_DH_DERIVE 112
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323 | # define DH_F_PKEY_DH_KEYGEN 113
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324 |
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325 | /* Reason codes. */
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326 | # define DH_R_BAD_GENERATOR 101
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327 | # define DH_R_BN_DECODE_ERROR 109
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328 | # define DH_R_BN_ERROR 106
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329 | # define DH_R_DECODE_ERROR 104
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330 | # define DH_R_INVALID_PUBKEY 102
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331 | # define DH_R_KDF_PARAMETER_ERROR 112
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332 | # define DH_R_KEYS_NOT_SET 108
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333 | # define DH_R_MODULUS_TOO_LARGE 103
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334 | # define DH_R_NO_PARAMETERS_SET 107
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335 | # define DH_R_NO_PRIVATE_VALUE 100
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336 | # define DH_R_PARAMETER_ENCODING_ERROR 105
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337 | # define DH_R_PEER_KEY_ERROR 111
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338 | # define DH_R_SHARED_INFO_ERROR 113
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339 |
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340 | # ifdef __cplusplus
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341 | }
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342 | # endif
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343 | # endif
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344 | #endif
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