[331] | 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 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/bn.h>
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| 13 | #include <openssl/err.h>
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| 14 | #include <openssl/objects.h>
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| 15 | #include <openssl/evp.h>
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| 16 | #include <openssl/x509.h>
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| 17 | #include <openssl/rsa.h>
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| 18 | #include <openssl/dsa.h>
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| 19 | #include <openssl/dh.h>
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| 20 | #include <openssl/engine.h>
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| 21 |
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| 22 | #include "internal/asn1_int.h"
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| 23 | #include "internal/evp_int.h"
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| 24 |
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| 25 | static void EVP_PKEY_free_it(EVP_PKEY *x);
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| 26 |
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| 27 | int EVP_PKEY_bits(const EVP_PKEY *pkey)
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| 28 | {
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| 29 | if (pkey && pkey->ameth && pkey->ameth->pkey_bits)
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| 30 | return pkey->ameth->pkey_bits(pkey);
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| 31 | return 0;
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| 32 | }
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| 33 |
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| 34 | int EVP_PKEY_security_bits(const EVP_PKEY *pkey)
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| 35 | {
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| 36 | if (pkey == NULL)
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| 37 | return 0;
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| 38 | if (!pkey->ameth || !pkey->ameth->pkey_security_bits)
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| 39 | return -2;
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| 40 | return pkey->ameth->pkey_security_bits(pkey);
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| 41 | }
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| 42 |
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| 43 | int EVP_PKEY_size(EVP_PKEY *pkey)
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| 44 | {
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| 45 | if (pkey && pkey->ameth && pkey->ameth->pkey_size)
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| 46 | return pkey->ameth->pkey_size(pkey);
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| 47 | return 0;
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| 48 | }
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| 49 |
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| 50 | int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)
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| 51 | {
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| 52 | #ifndef OPENSSL_NO_DSA
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| 53 | if (pkey->type == EVP_PKEY_DSA) {
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| 54 | int ret = pkey->save_parameters;
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| 55 |
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| 56 | if (mode >= 0)
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| 57 | pkey->save_parameters = mode;
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| 58 | return (ret);
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| 59 | }
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| 60 | #endif
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| 61 | #ifndef OPENSSL_NO_EC
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| 62 | if (pkey->type == EVP_PKEY_EC) {
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| 63 | int ret = pkey->save_parameters;
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| 64 |
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| 65 | if (mode >= 0)
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| 66 | pkey->save_parameters = mode;
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| 67 | return (ret);
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| 68 | }
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| 69 | #endif
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| 70 | return (0);
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| 71 | }
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| 72 |
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| 73 | int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
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| 74 | {
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| 75 | if (to->type == EVP_PKEY_NONE) {
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| 76 | if (EVP_PKEY_set_type(to, from->type) == 0)
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| 77 | return 0;
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| 78 | } else if (to->type != from->type) {
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| 79 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_KEY_TYPES);
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| 80 | goto err;
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| 81 | }
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| 82 |
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| 83 | if (EVP_PKEY_missing_parameters(from)) {
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| 84 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_MISSING_PARAMETERS);
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| 85 | goto err;
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| 86 | }
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| 87 |
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| 88 | if (!EVP_PKEY_missing_parameters(to)) {
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| 89 | if (EVP_PKEY_cmp_parameters(to, from) == 1)
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| 90 | return 1;
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| 91 | EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS, EVP_R_DIFFERENT_PARAMETERS);
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| 92 | return 0;
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| 93 | }
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| 94 |
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| 95 | if (from->ameth && from->ameth->param_copy)
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| 96 | return from->ameth->param_copy(to, from);
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| 97 | err:
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| 98 | return 0;
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| 99 | }
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| 100 |
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| 101 | int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)
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| 102 | {
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| 103 | if (pkey->ameth && pkey->ameth->param_missing)
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| 104 | return pkey->ameth->param_missing(pkey);
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| 105 | return 0;
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| 106 | }
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| 107 |
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| 108 | int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
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| 109 | {
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| 110 | if (a->type != b->type)
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| 111 | return -1;
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| 112 | if (a->ameth && a->ameth->param_cmp)
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| 113 | return a->ameth->param_cmp(a, b);
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| 114 | return -2;
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| 115 | }
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| 116 |
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| 117 | int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
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| 118 | {
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| 119 | if (a->type != b->type)
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| 120 | return -1;
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| 121 |
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| 122 | if (a->ameth) {
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| 123 | int ret;
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| 124 | /* Compare parameters if the algorithm has them */
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| 125 | if (a->ameth->param_cmp) {
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| 126 | ret = a->ameth->param_cmp(a, b);
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| 127 | if (ret <= 0)
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| 128 | return ret;
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| 129 | }
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| 130 |
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| 131 | if (a->ameth->pub_cmp)
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| 132 | return a->ameth->pub_cmp(a, b);
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| 133 | }
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| 134 |
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| 135 | return -2;
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| 136 | }
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| 137 |
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| 138 | EVP_PKEY *EVP_PKEY_new(void)
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| 139 | {
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| 140 | EVP_PKEY *ret = OPENSSL_zalloc(sizeof(*ret));
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| 141 |
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| 142 | if (ret == NULL) {
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| 143 | EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
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| 144 | return NULL;
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| 145 | }
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| 146 | ret->type = EVP_PKEY_NONE;
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| 147 | ret->save_type = EVP_PKEY_NONE;
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| 148 | ret->references = 1;
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| 149 | ret->save_parameters = 1;
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| 150 | ret->lock = CRYPTO_THREAD_lock_new();
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| 151 | if (ret->lock == NULL) {
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| 152 | EVPerr(EVP_F_EVP_PKEY_NEW, ERR_R_MALLOC_FAILURE);
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| 153 | OPENSSL_free(ret);
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| 154 | return NULL;
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| 155 | }
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| 156 | return ret;
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| 157 | }
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| 158 |
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| 159 | int EVP_PKEY_up_ref(EVP_PKEY *pkey)
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| 160 | {
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| 161 | int i;
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| 162 |
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| 163 | if (CRYPTO_atomic_add(&pkey->references, 1, &i, pkey->lock) <= 0)
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| 164 | return 0;
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| 165 |
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| 166 | REF_PRINT_COUNT("EVP_PKEY", pkey);
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| 167 | REF_ASSERT_ISNT(i < 2);
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| 168 | return ((i > 1) ? 1 : 0);
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| 169 | }
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| 170 |
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| 171 | /*
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| 172 | * Setup a public key ASN1 method and ENGINE from a NID or a string. If pkey
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| 173 | * is NULL just return 1 or 0 if the algorithm exists.
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| 174 | */
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| 175 |
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| 176 | static int pkey_set_type(EVP_PKEY *pkey, int type, const char *str, int len)
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| 177 | {
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| 178 | const EVP_PKEY_ASN1_METHOD *ameth;
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| 179 | ENGINE *e = NULL;
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| 180 | if (pkey) {
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| 181 | if (pkey->pkey.ptr)
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| 182 | EVP_PKEY_free_it(pkey);
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| 183 | /*
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| 184 | * If key type matches and a method exists then this lookup has
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| 185 | * succeeded once so just indicate success.
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| 186 | */
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| 187 | if ((type == pkey->save_type) && pkey->ameth)
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| 188 | return 1;
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| 189 | #ifndef OPENSSL_NO_ENGINE
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| 190 | /* If we have an ENGINE release it */
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| 191 | ENGINE_finish(pkey->engine);
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| 192 | pkey->engine = NULL;
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| 193 | #endif
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| 194 | }
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| 195 | if (str)
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| 196 | ameth = EVP_PKEY_asn1_find_str(&e, str, len);
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| 197 | else
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| 198 | ameth = EVP_PKEY_asn1_find(&e, type);
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| 199 | #ifndef OPENSSL_NO_ENGINE
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| 200 | if (pkey == NULL)
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| 201 | ENGINE_finish(e);
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| 202 | #endif
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| 203 | if (ameth == NULL) {
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| 204 | EVPerr(EVP_F_PKEY_SET_TYPE, EVP_R_UNSUPPORTED_ALGORITHM);
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| 205 | return 0;
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| 206 | }
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| 207 | if (pkey) {
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| 208 | pkey->ameth = ameth;
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| 209 | pkey->engine = e;
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| 210 |
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| 211 | pkey->type = pkey->ameth->pkey_id;
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| 212 | pkey->save_type = type;
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| 213 | }
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| 214 | return 1;
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| 215 | }
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| 216 |
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| 217 | int EVP_PKEY_set_type(EVP_PKEY *pkey, int type)
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| 218 | {
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| 219 | return pkey_set_type(pkey, type, NULL, -1);
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| 220 | }
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| 221 |
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| 222 | int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len)
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| 223 | {
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| 224 | return pkey_set_type(pkey, EVP_PKEY_NONE, str, len);
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| 225 | }
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| 226 |
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| 227 | int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key)
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| 228 | {
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| 229 | if (pkey == NULL || !EVP_PKEY_set_type(pkey, type))
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| 230 | return 0;
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| 231 | pkey->pkey.ptr = key;
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| 232 | return (key != NULL);
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| 233 | }
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| 234 |
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| 235 | void *EVP_PKEY_get0(const EVP_PKEY *pkey)
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| 236 | {
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| 237 | return pkey->pkey.ptr;
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| 238 | }
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| 239 |
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| 240 | const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len)
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| 241 | {
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| 242 | ASN1_OCTET_STRING *os = NULL;
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| 243 | if (pkey->type != EVP_PKEY_HMAC) {
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| 244 | EVPerr(EVP_F_EVP_PKEY_GET0_HMAC, EVP_R_EXPECTING_AN_HMAC_KEY);
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| 245 | return NULL;
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| 246 | }
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| 247 | os = EVP_PKEY_get0(pkey);
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| 248 | *len = os->length;
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| 249 | return os->data;
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| 250 | }
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| 251 |
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| 252 | #ifndef OPENSSL_NO_RSA
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| 253 | int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)
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| 254 | {
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| 255 | int ret = EVP_PKEY_assign_RSA(pkey, key);
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| 256 | if (ret)
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| 257 | RSA_up_ref(key);
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| 258 | return ret;
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| 259 | }
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| 260 |
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| 261 | RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey)
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| 262 | {
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| 263 | if (pkey->type != EVP_PKEY_RSA) {
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| 264 | EVPerr(EVP_F_EVP_PKEY_GET0_RSA, EVP_R_EXPECTING_AN_RSA_KEY);
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| 265 | return NULL;
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| 266 | }
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| 267 | return pkey->pkey.rsa;
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| 268 | }
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| 269 |
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| 270 | RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)
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| 271 | {
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| 272 | RSA *ret = EVP_PKEY_get0_RSA(pkey);
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| 273 | if (ret != NULL)
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| 274 | RSA_up_ref(ret);
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| 275 | return ret;
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| 276 | }
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| 277 | #endif
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| 278 |
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| 279 | #ifndef OPENSSL_NO_DSA
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| 280 | int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)
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| 281 | {
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| 282 | int ret = EVP_PKEY_assign_DSA(pkey, key);
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| 283 | if (ret)
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| 284 | DSA_up_ref(key);
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| 285 | return ret;
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| 286 | }
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| 287 |
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| 288 | DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey)
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| 289 | {
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| 290 | if (pkey->type != EVP_PKEY_DSA) {
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| 291 | EVPerr(EVP_F_EVP_PKEY_GET0_DSA, EVP_R_EXPECTING_A_DSA_KEY);
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| 292 | return NULL;
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| 293 | }
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| 294 | return pkey->pkey.dsa;
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| 295 | }
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| 296 |
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| 297 | DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)
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| 298 | {
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| 299 | DSA *ret = EVP_PKEY_get0_DSA(pkey);
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| 300 | if (ret != NULL)
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| 301 | DSA_up_ref(ret);
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| 302 | return ret;
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| 303 | }
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| 304 | #endif
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| 305 |
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| 306 | #ifndef OPENSSL_NO_EC
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| 307 |
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| 308 | int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)
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| 309 | {
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| 310 | int ret = EVP_PKEY_assign_EC_KEY(pkey, key);
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| 311 | if (ret)
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| 312 | EC_KEY_up_ref(key);
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| 313 | return ret;
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| 314 | }
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| 315 |
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| 316 | EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)
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| 317 | {
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| 318 | if (pkey->type != EVP_PKEY_EC) {
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| 319 | EVPerr(EVP_F_EVP_PKEY_GET0_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);
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| 320 | return NULL;
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| 321 | }
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| 322 | return pkey->pkey.ec;
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| 323 | }
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| 324 |
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| 325 | EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)
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| 326 | {
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| 327 | EC_KEY *ret = EVP_PKEY_get0_EC_KEY(pkey);
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| 328 | if (ret != NULL)
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| 329 | EC_KEY_up_ref(ret);
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| 330 | return ret;
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| 331 | }
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| 332 | #endif
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| 333 |
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| 334 | #ifndef OPENSSL_NO_DH
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| 335 |
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| 336 | int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)
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| 337 | {
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| 338 | int ret = EVP_PKEY_assign_DH(pkey, key);
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| 339 | if (ret)
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| 340 | DH_up_ref(key);
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| 341 | return ret;
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| 342 | }
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| 343 |
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| 344 | DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey)
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| 345 | {
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| 346 | if (pkey->type != EVP_PKEY_DH && pkey->type != EVP_PKEY_DHX) {
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| 347 | EVPerr(EVP_F_EVP_PKEY_GET0_DH, EVP_R_EXPECTING_A_DH_KEY);
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| 348 | return NULL;
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| 349 | }
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| 350 | return pkey->pkey.dh;
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| 351 | }
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| 352 |
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| 353 | DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)
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| 354 | {
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| 355 | DH *ret = EVP_PKEY_get0_DH(pkey);
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| 356 | if (ret != NULL)
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| 357 | DH_up_ref(ret);
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| 358 | return ret;
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| 359 | }
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| 360 | #endif
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| 361 |
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| 362 | int EVP_PKEY_type(int type)
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| 363 | {
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| 364 | int ret;
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| 365 | const EVP_PKEY_ASN1_METHOD *ameth;
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| 366 | ENGINE *e;
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| 367 | ameth = EVP_PKEY_asn1_find(&e, type);
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| 368 | if (ameth)
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| 369 | ret = ameth->pkey_id;
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| 370 | else
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| 371 | ret = NID_undef;
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| 372 | #ifndef OPENSSL_NO_ENGINE
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| 373 | ENGINE_finish(e);
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| 374 | #endif
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| 375 | return ret;
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| 376 | }
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| 377 |
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| 378 | int EVP_PKEY_id(const EVP_PKEY *pkey)
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| 379 | {
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| 380 | return pkey->type;
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| 381 | }
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| 382 |
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| 383 | int EVP_PKEY_base_id(const EVP_PKEY *pkey)
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| 384 | {
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| 385 | return EVP_PKEY_type(pkey->type);
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| 386 | }
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| 387 |
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| 388 | void EVP_PKEY_free(EVP_PKEY *x)
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| 389 | {
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| 390 | int i;
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| 391 |
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| 392 | if (x == NULL)
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| 393 | return;
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| 394 |
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| 395 | CRYPTO_atomic_add(&x->references, -1, &i, x->lock);
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| 396 | REF_PRINT_COUNT("EVP_PKEY", x);
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| 397 | if (i > 0)
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| 398 | return;
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| 399 | REF_ASSERT_ISNT(i < 0);
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| 400 | EVP_PKEY_free_it(x);
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| 401 | CRYPTO_THREAD_lock_free(x->lock);
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| 402 | sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);
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| 403 | OPENSSL_free(x);
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| 404 | }
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| 405 |
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| 406 | static void EVP_PKEY_free_it(EVP_PKEY *x)
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| 407 | {
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| 408 | /* internal function; x is never NULL */
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| 409 | if (x->ameth && x->ameth->pkey_free) {
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| 410 | x->ameth->pkey_free(x);
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| 411 | x->pkey.ptr = NULL;
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| 412 | }
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| 413 | #ifndef OPENSSL_NO_ENGINE
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| 414 | ENGINE_finish(x->engine);
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| 415 | x->engine = NULL;
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| 416 | #endif
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| 417 | }
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| 418 |
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| 419 | static int unsup_alg(BIO *out, const EVP_PKEY *pkey, int indent,
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| 420 | const char *kstr)
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| 421 | {
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| 422 | BIO_indent(out, indent, 128);
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| 423 | BIO_printf(out, "%s algorithm \"%s\" unsupported\n",
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| 424 | kstr, OBJ_nid2ln(pkey->type));
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| 425 | return 1;
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| 426 | }
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| 427 |
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| 428 | int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
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| 429 | int indent, ASN1_PCTX *pctx)
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| 430 | {
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| 431 | if (pkey->ameth && pkey->ameth->pub_print)
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| 432 | return pkey->ameth->pub_print(out, pkey, indent, pctx);
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| 433 |
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| 434 | return unsup_alg(out, pkey, indent, "Public Key");
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| 435 | }
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| 436 |
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| 437 | int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
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| 438 | int indent, ASN1_PCTX *pctx)
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| 439 | {
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| 440 | if (pkey->ameth && pkey->ameth->priv_print)
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| 441 | return pkey->ameth->priv_print(out, pkey, indent, pctx);
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| 442 |
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| 443 | return unsup_alg(out, pkey, indent, "Private Key");
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| 444 | }
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| 445 |
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| 446 | int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
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| 447 | int indent, ASN1_PCTX *pctx)
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| 448 | {
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| 449 | if (pkey->ameth && pkey->ameth->param_print)
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| 450 | return pkey->ameth->param_print(out, pkey, indent, pctx);
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| 451 | return unsup_alg(out, pkey, indent, "Parameters");
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| 452 | }
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| 453 |
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| 454 | static int evp_pkey_asn1_ctrl(EVP_PKEY *pkey, int op, int arg1, void *arg2)
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| 455 | {
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| 456 | if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL)
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| 457 | return -2;
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| 458 | return pkey->ameth->pkey_ctrl(pkey, op, arg1, arg2);
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| 459 | }
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| 460 |
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| 461 | int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid)
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| 462 | {
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| 463 | return evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_DEFAULT_MD_NID, 0, pnid);
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| 464 | }
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| 465 |
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| 466 | int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
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| 467 | const unsigned char *pt, size_t ptlen)
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| 468 | {
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| 469 | if (ptlen > INT_MAX)
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| 470 | return 0;
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| 471 | if (evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_SET1_TLS_ENCPT, ptlen,
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| 472 | (void *)pt) <= 0)
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| 473 | return 0;
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| 474 | return 1;
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| 475 | }
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| 476 |
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| 477 | size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt)
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| 478 | {
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| 479 | int rv;
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| 480 | rv = evp_pkey_asn1_ctrl(pkey, ASN1_PKEY_CTRL_GET1_TLS_ENCPT, 0, ppt);
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| 481 | if (rv <= 0)
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| 482 | return 0;
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| 483 | return rv;
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| 484 | }
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