[331] | 1 | /*
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| 2 | * Copyright 2006-2016 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 <stdlib.h>
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| 12 | #include "internal/cryptlib.h"
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| 13 | #include <openssl/objects.h>
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| 14 | #include <openssl/evp.h>
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| 15 | #include "internal/bn_int.h"
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| 16 | #include "internal/evp_int.h"
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| 17 |
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| 18 | int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
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| 19 | {
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| 20 | int ret;
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| 21 | if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
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| 22 | EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
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| 23 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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| 24 | return -2;
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| 25 | }
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| 26 | ctx->operation = EVP_PKEY_OP_PARAMGEN;
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| 27 | if (!ctx->pmeth->paramgen_init)
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| 28 | return 1;
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| 29 | ret = ctx->pmeth->paramgen_init(ctx);
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| 30 | if (ret <= 0)
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| 31 | ctx->operation = EVP_PKEY_OP_UNDEFINED;
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| 32 | return ret;
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| 33 | }
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| 34 |
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| 35 | int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
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| 36 | {
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| 37 | int ret;
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| 38 | if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
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| 39 | EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
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| 40 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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| 41 | return -2;
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| 42 | }
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| 43 |
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| 44 | if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
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| 45 | EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
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| 46 | return -1;
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| 47 | }
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| 48 |
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| 49 | if (ppkey == NULL)
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| 50 | return -1;
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| 51 |
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| 52 | if (*ppkey == NULL)
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| 53 | *ppkey = EVP_PKEY_new();
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| 54 |
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| 55 | if (*ppkey == NULL) {
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| 56 | EVPerr(EVP_F_EVP_PKEY_PARAMGEN, ERR_R_MALLOC_FAILURE);
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| 57 | return -1;
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| 58 | }
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| 59 |
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| 60 | ret = ctx->pmeth->paramgen(ctx, *ppkey);
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| 61 | if (ret <= 0) {
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| 62 | EVP_PKEY_free(*ppkey);
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| 63 | *ppkey = NULL;
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| 64 | }
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| 65 | return ret;
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| 66 | }
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| 67 |
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| 68 | int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
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| 69 | {
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| 70 | int ret;
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| 71 | if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
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| 72 | EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
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| 73 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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| 74 | return -2;
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| 75 | }
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| 76 | ctx->operation = EVP_PKEY_OP_KEYGEN;
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| 77 | if (!ctx->pmeth->keygen_init)
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| 78 | return 1;
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| 79 | ret = ctx->pmeth->keygen_init(ctx);
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| 80 | if (ret <= 0)
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| 81 | ctx->operation = EVP_PKEY_OP_UNDEFINED;
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| 82 | return ret;
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| 83 | }
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| 84 |
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| 85 | int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
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| 86 | {
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| 87 | int ret;
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| 88 |
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| 89 | if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
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| 90 | EVPerr(EVP_F_EVP_PKEY_KEYGEN,
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| 91 | EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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| 92 | return -2;
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| 93 | }
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| 94 | if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
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| 95 | EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
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| 96 | return -1;
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| 97 | }
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| 98 |
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| 99 | if (ppkey == NULL)
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| 100 | return -1;
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| 101 |
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| 102 | if (*ppkey == NULL)
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| 103 | *ppkey = EVP_PKEY_new();
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| 104 | if (*ppkey == NULL)
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| 105 | return -1;
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| 106 |
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| 107 | ret = ctx->pmeth->keygen(ctx, *ppkey);
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| 108 | if (ret <= 0) {
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| 109 | EVP_PKEY_free(*ppkey);
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| 110 | *ppkey = NULL;
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| 111 | }
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| 112 | return ret;
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| 113 | }
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| 114 |
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| 115 | void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
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| 116 | {
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| 117 | ctx->pkey_gencb = cb;
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| 118 | }
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| 119 |
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| 120 | EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
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| 121 | {
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| 122 | return ctx->pkey_gencb;
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| 123 | }
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| 124 |
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| 125 | /*
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| 126 | * "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
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| 127 | * callbacks.
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| 128 | */
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| 129 |
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| 130 | static int trans_cb(int a, int b, BN_GENCB *gcb)
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| 131 | {
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| 132 | EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
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| 133 | ctx->keygen_info[0] = a;
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| 134 | ctx->keygen_info[1] = b;
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| 135 | return ctx->pkey_gencb(ctx);
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| 136 | }
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| 137 |
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| 138 | void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
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| 139 | {
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| 140 | BN_GENCB_set(cb, trans_cb, ctx);
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| 141 | }
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| 142 |
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| 143 | int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
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| 144 | {
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| 145 | if (idx == -1)
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| 146 | return ctx->keygen_info_count;
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| 147 | if (idx < 0 || idx > ctx->keygen_info_count)
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| 148 | return 0;
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| 149 | return ctx->keygen_info[idx];
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| 150 | }
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| 151 |
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| 152 | EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
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| 153 | const unsigned char *key, int keylen)
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| 154 | {
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| 155 | EVP_PKEY_CTX *mac_ctx = NULL;
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| 156 | EVP_PKEY *mac_key = NULL;
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| 157 | mac_ctx = EVP_PKEY_CTX_new_id(type, e);
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| 158 | if (!mac_ctx)
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| 159 | return NULL;
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| 160 | if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
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| 161 | goto merr;
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| 162 | if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
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| 163 | goto merr;
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| 164 | if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
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| 165 | goto merr;
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| 166 | merr:
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| 167 | EVP_PKEY_CTX_free(mac_ctx);
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| 168 | return mac_key;
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| 169 | }
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