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rsa_alt.h
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1 /**
2  * \file rsa_alt.h
3  *
4  * \brief This file provides an API for the RSA public-key cryptosystem.
5  *
6  * The RSA public-key cryptosystem is defined in <em>Public-Key
7  * Cryptography Standards (PKCS) #1 v1.5: RSA Encryption</em>
8  * and <em>Public-Key Cryptography Standards (PKCS) #1 v2.1:
9  * RSA Cryptography Specifications</em>.
10  *
11  */
12 /*
13  * Copyright The Mbed TLS Contributors
14  * SPDX-License-Identifier: Apache-2.0
15  *
16  * Licensed under the Apache License, Version 2.0 (the "License"); you may
17  * not use this file except in compliance with the License.
18  * You may obtain a copy of the License at
19  *
20  * http://www.apache.org/licenses/LICENSE-2.0
21  *
22  * Unless required by applicable law or agreed to in writing, software
23  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
24  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25  * See the License for the specific language governing permissions and
26  * limitations under the License.
27  */
28 #ifndef MBEDTLS_RSA_ALT_H
29 #define MBEDTLS_RSA_ALT_H
30 
31 #if !defined(MBEDTLS_CONFIG_FILE)
32 #include "mbedtls/config.h"
33 #else
34 #include MBEDTLS_CONFIG_FILE
35 #endif
36 
37 #include "mbedtls/bignum.h"
38 #include "mbedtls/md.h"
39 
40 #if defined(MBEDTLS_THREADING_C)
41 #include "mbedtls/threading.h"
42 #endif
43 
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47 
48 #if defined(MBEDTLS_RSA_ALT)
49 // Regular implementation
50 //
51 
52 /* Enable Nuvoton's Crypto RSA H/W */
53 #define NU_CRYPTO_RSA_ENABLE
54 
55 /**
56  * \brief The RSA context structure.
57  *
58  * \note Direct manipulation of the members of this structure
59  * is deprecated. All manipulation should instead be done through
60  * the public interface functions.
61  */
62 typedef struct mbedtls_rsa_context
63 {
64  int ver; /*!< Always 0.*/
65  size_t len; /*!< The size of \p N in Bytes. */
66 
67  mbedtls_mpi N; /*!< The public modulus. */
68  mbedtls_mpi E; /*!< The public exponent. */
69 
70  mbedtls_mpi D; /*!< The private exponent. */
71  mbedtls_mpi P; /*!< The first prime factor. */
72  mbedtls_mpi Q; /*!< The second prime factor. */
73 
74  mbedtls_mpi DP; /*!< <code>D % (P - 1)</code>. */
75  mbedtls_mpi DQ; /*!< <code>D % (Q - 1)</code>. */
76  mbedtls_mpi QP; /*!< <code>1 / (Q % P)</code>. */
77 
78  mbedtls_mpi RN; /*!< cached <code>R^2 mod N</code>. */
79 
80  mbedtls_mpi RP; /*!< cached <code>R^2 mod P</code>. */
81  mbedtls_mpi RQ; /*!< cached <code>R^2 mod Q</code>. */
82 
83  mbedtls_mpi Vi; /*!< The cached blinding value. */
84  mbedtls_mpi Vf; /*!< The cached un-blinding value. */
85 
86  int padding; /*!< Selects padding mode:
87  #MBEDTLS_RSA_PKCS_V15 for 1.5 padding and
88  #MBEDTLS_RSA_PKCS_V21 for OAEP or PSS. */
89  int hash_id; /*!< Hash identifier of mbedtls_md_type_t type,
90  as specified in md.h for use in the MGF
91  mask generating function used in the
92  EME-OAEP and EMSA-PSS encodings. */
93 #if defined(MBEDTLS_THREADING_C)
94  mbedtls_threading_mutex_t mutex; /*!< Thread-safety mutex. */
95 #endif
96 
97 #if defined(NU_CRYPTO_RSA_ENABLE)
98  int hw_init; /*!< Initialized Crypto RSA H/W or not. */
99 #endif
100 }
101 mbedtls_rsa_context;
102 
103 #endif /* MBEDTLS_RSA_ALT */
104 
105 #ifdef __cplusplus
106 }
107 #endif
108 
109 #endif /* rsa_alt.h */
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