crypto/ec/ecx_key.c

   1 /*
   2  * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 <string.h>
  11 #include <openssl/err.h>
  12 #include "crypto/ecx.h"
  13
  14 ECX_KEY *ossl_ecx_key_new(OSSL_LIB_CTX *libctx, ECX_KEY_TYPE type, int haspubkey,
  15                           const char *propq)
  16 {
  17     ECX_KEY *ret = OPENSSL_zalloc(sizeof(*ret));
  18
  19     if (ret == NULL)
  20         return NULL;
  21
  22     ret->libctx = libctx;
  23     ret->haspubkey = haspubkey;
  24     switch (type) {
  25     case ECX_KEY_TYPE_X25519:
  26         ret->keylen = X25519_KEYLEN;
  27         break;
  28     case ECX_KEY_TYPE_X448:
  29         ret->keylen = X448_KEYLEN;
  30         break;
  31     case ECX_KEY_TYPE_ED25519:
  32         ret->keylen = ED25519_KEYLEN;
  33         break;
  34     case ECX_KEY_TYPE_ED448:
  35         ret->keylen = ED448_KEYLEN;
  36         break;
  37     }
  38     ret->type = type;
  39     ret->references = 1;
  40
  41     if (propq != NULL) {
  42         ret->propq = OPENSSL_strdup(propq);
  43         if (ret->propq == NULL)
  44             goto err;
  45     }
  46
  47     ret->lock = CRYPTO_THREAD_lock_new();
  48     if (ret->lock == NULL)
  49         goto err;
  50     return ret;
  51 err:
  52     ERR_raise(ERR_LIB_EC, ERR_R_MALLOC_FAILURE);
  53     OPENSSL_free(ret);
  54     return NULL;
  55 }
  56
  57 void ossl_ecx_key_free(ECX_KEY *key)
  58 {
  59     int i;
  60
  61     if (key == NULL)
  62         return;
  63
  64     CRYPTO_DOWN_REF(&key->references, &i, key->lock);
  65     REF_PRINT_COUNT("ECX_KEY", key);
  66     if (i > 0)
  67         return;
  68     REF_ASSERT_ISNT(i < 0);
  69
  70     OPENSSL_free(key->propq);
  71     OPENSSL_secure_clear_free(key->privkey, key->keylen);
  72     CRYPTO_THREAD_lock_free(key->lock);
  73     OPENSSL_free(key);
  74 }
  75
  76 void ossl_ecx_key_set0_libctx(ECX_KEY *key, OSSL_LIB_CTX *libctx)
  77 {
  78     key->libctx = libctx;
  79 }
  80
  81 int ossl_ecx_key_up_ref(ECX_KEY *key)
  82 {
  83     int i;
  84
  85     if (CRYPTO_UP_REF(&key->references, &i, key->lock) <= 0)
  86         return 0;
  87
  88     REF_PRINT_COUNT("ECX_KEY", key);
  89     REF_ASSERT_ISNT(i < 2);
  90     return ((i > 1) ? 1 : 0);
  91 }
  92
  93 unsigned char *ossl_ecx_key_allocate_privkey(ECX_KEY *key)
  94 {
  95     key->privkey = OPENSSL_secure_zalloc(key->keylen);
  96
  97     return key->privkey;
  98 }