libkern/crypto/corecrypto_rsa.c

   1 /*
   2  * Copyright (c) 2016 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <libkern/crypto/crypto_internal.h>
  30 #include <libkern/crypto/rsa.h>
  31 #include <corecrypto/ccrsa.h>
  32
  33
  34 int
  35 rsa_make_pub(rsa_pub_ctx *pub,
  36     size_t exp_nbytes, const uint8_t *exp,
  37     size_t mod_nbytes, const uint8_t *mod)
  38 {
  39         if ((exp_nbytes > RSA_MAX_KEY_BITSIZE / 8)
  40             || (mod_nbytes > RSA_MAX_KEY_BITSIZE / 8)) {
  41                 return -1; // Too big
  42         }
  43         ccrsa_ctx_n(pub->key) = ccn_nof(RSA_MAX_KEY_BITSIZE);
  44         return g_crypto_funcs->ccrsa_make_pub_fn(pub->key,
  45                    exp_nbytes, exp,
  46                    mod_nbytes, mod);
  47 }
  48
  49 int
  50 rsa_verify_pkcs1v15(rsa_pub_ctx *pub, const uint8_t *oid,
  51     size_t digest_len, const uint8_t *digest,
  52     size_t sig_len, const uint8_t *sig,
  53     bool *valid)
  54 {
  55         return g_crypto_funcs->ccrsa_verify_pkcs1v15_fn(pub->key, oid,
  56                    digest_len, digest,
  57                    sig_len, sig, valid);
  58 }