crypto/evp/pmeth_gn.c

   1 /*
   2  * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "internal/cryptlib.h"
  13 #include <openssl/objects.h>
  14 #include <openssl/evp.h>
  15 #include "internal/bn_int.h"
  16 #include "internal/asn1_int.h"
  17 #include "internal/evp_int.h"
  18
  19 int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
  20 {
  21     int ret;
  22     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
  23         EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
  24                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  25         return -2;
  26     }
  27     ctx->operation = EVP_PKEY_OP_PARAMGEN;
  28     if (!ctx->pmeth->paramgen_init)
  29         return 1;
  30     ret = ctx->pmeth->paramgen_init(ctx);
  31     if (ret <= 0)
  32         ctx->operation = EVP_PKEY_OP_UNDEFINED;
  33     return ret;
  34 }
  35
  36 int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
  37 {
  38     int ret;
  39     if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
  40         EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
  41                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  42         return -2;
  43     }
  44
  45     if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
  46         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
  47         return -1;
  48     }
  49
  50     if (ppkey == NULL)
  51         return -1;
  52
  53     if (*ppkey == NULL)
  54         *ppkey = EVP_PKEY_new();
  55
  56     if (*ppkey == NULL) {
  57         EVPerr(EVP_F_EVP_PKEY_PARAMGEN, ERR_R_MALLOC_FAILURE);
  58         return -1;
  59     }
  60
  61     ret = ctx->pmeth->paramgen(ctx, *ppkey);
  62     if (ret <= 0) {
  63         EVP_PKEY_free(*ppkey);
  64         *ppkey = NULL;
  65     }
  66     return ret;
  67 }
  68
  69 int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
  70 {
  71     int ret;
  72     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
  73         EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
  74                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  75         return -2;
  76     }
  77     ctx->operation = EVP_PKEY_OP_KEYGEN;
  78     if (!ctx->pmeth->keygen_init)
  79         return 1;
  80     ret = ctx->pmeth->keygen_init(ctx);
  81     if (ret <= 0)
  82         ctx->operation = EVP_PKEY_OP_UNDEFINED;
  83     return ret;
  84 }
  85
  86 int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
  87 {
  88     int ret;
  89
  90     if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
  91         EVPerr(EVP_F_EVP_PKEY_KEYGEN,
  92                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
  93         return -2;
  94     }
  95     if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
  96         EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
  97         return -1;
  98     }
  99
 100     if (ppkey == NULL)
 101         return -1;
 102
 103     if (*ppkey == NULL)
 104         *ppkey = EVP_PKEY_new();
 105     if (*ppkey == NULL)
 106         return -1;
 107
 108     ret = ctx->pmeth->keygen(ctx, *ppkey);
 109     if (ret <= 0) {
 110         EVP_PKEY_free(*ppkey);
 111         *ppkey = NULL;
 112     }
 113     return ret;
 114 }
 115
 116 void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
 117 {
 118     ctx->pkey_gencb = cb;
 119 }
 120
 121 EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
 122 {
 123     return ctx->pkey_gencb;
 124 }
 125
 126 /*
 127  * "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
 128  * callbacks.
 129  */
 130
 131 static int trans_cb(int a, int b, BN_GENCB *gcb)
 132 {
 133     EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
 134     ctx->keygen_info[0] = a;
 135     ctx->keygen_info[1] = b;
 136     return ctx->pkey_gencb(ctx);
 137 }
 138
 139 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
 140 {
 141     BN_GENCB_set(cb, trans_cb, ctx);
 142 }
 143
 144 int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
 145 {
 146     if (idx == -1)
 147         return ctx->keygen_info_count;
 148     if (idx < 0 || idx > ctx->keygen_info_count)
 149         return 0;
 150     return ctx->keygen_info[idx];
 151 }
 152
 153 EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
 154                                const unsigned char *key, int keylen)
 155 {
 156     EVP_PKEY_CTX *mac_ctx = NULL;
 157     EVP_PKEY *mac_key = NULL;
 158     mac_ctx = EVP_PKEY_CTX_new_id(type, e);
 159     if (!mac_ctx)
 160         return NULL;
 161     if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
 162         goto merr;
 163     if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
 164         goto merr;
 165     if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
 166         goto merr;
 167  merr:
 168     EVP_PKEY_CTX_free(mac_ctx);
 169     return mac_key;
 170 }
 171
 172 int EVP_PKEY_check(EVP_PKEY_CTX *ctx)
 173 {
 174     EVP_PKEY *pkey = ctx->pkey;
 175
 176     if (pkey == NULL) {
 177         EVPerr(EVP_F_EVP_PKEY_CHECK, EVP_R_NO_KEY_SET);
 178         return 0;
 179     }
 180
 181     /* call customized check function first */
 182     if (ctx->pmeth->check != NULL)
 183         return ctx->pmeth->check(pkey);
 184
 185     /* use default check function in ameth */
 186     if (pkey->ameth == NULL || pkey->ameth->pkey_check == NULL) {
 187         EVPerr(EVP_F_EVP_PKEY_CHECK,
 188                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 189         return -2;
 190     }
 191
 192     return pkey->ameth->pkey_check(pkey);
 193 }
 194
 195 int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx)
 196 {
 197     EVP_PKEY *pkey = ctx->pkey;
 198
 199     if (pkey == NULL) {
 200         EVPerr(EVP_F_EVP_PKEY_PUBLIC_CHECK, EVP_R_NO_KEY_SET);
 201         return 0;
 202     }
 203
 204     /* call customized public key check function first */
 205     if (ctx->pmeth->public_check != NULL)
 206         return ctx->pmeth->public_check(pkey);
 207
 208     /* use default public key check function in ameth */
 209     if (pkey->ameth == NULL || pkey->ameth->pkey_public_check == NULL) {
 210         EVPerr(EVP_F_EVP_PKEY_PUBLIC_CHECK,
 211                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 212         return -2;
 213     }
 214
 215     return pkey->ameth->pkey_public_check(pkey);
 216 }
 217
 218 int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx)
 219 {
 220     EVP_PKEY *pkey = ctx->pkey;
 221
 222     if (pkey == NULL) {
 223         EVPerr(EVP_F_EVP_PKEY_PARAM_CHECK, EVP_R_NO_KEY_SET);
 224         return 0;
 225     }
 226
 227     /* call customized param check function first */
 228     if (ctx->pmeth->param_check != NULL)
 229         return ctx->pmeth->param_check(pkey);
 230
 231     /* use default param check function in ameth */
 232     if (pkey->ameth == NULL || pkey->ameth->pkey_param_check == NULL) {
 233         EVPerr(EVP_F_EVP_PKEY_PARAM_CHECK,
 234                EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
 235         return -2;
 236     }
 237
 238     return pkey->ameth->pkey_param_check(pkey);
 239 }