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sha512_alt_sw.h
1 /**
2  * \file sha512.h
3  *
4  * \brief SHA-384 and SHA-512 cryptographic hash function
5  *
6  * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
7  * SPDX-License-Identifier: Apache-2.0
8  *
9  * Licensed under the Apache License, Version 2.0 (the "License"); you may
10  * not use this file except in compliance with the License.
11  * You may obtain a copy of the License at
12  *
13  * http://www.apache.org/licenses/LICENSE-2.0
14  *
15  * Unless required by applicable law or agreed to in writing, software
16  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
17  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18  * See the License for the specific language governing permissions and
19  * limitations under the License.
20  *
21  * This file is part of mbed TLS (https://tls.mbed.org)
22  */
23 #ifndef MBEDTLS_SHA512_ALT_SW_H
24 #define MBEDTLS_SHA512_ALT_SW_H
25 
26 #if defined(MBEDTLS_SHA512_ALT)
27 
28 #include <stddef.h>
29 #include <stdint.h>
30 
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34 
35 /**
36  * \brief SHA-512 context structure
37  */
38 typedef struct {
39  uint64_t total[2]; /*!< number of bytes processed */
40  uint64_t state[8]; /*!< intermediate digest state */
41  unsigned char buffer[128]; /*!< data block being processed */
42  int is384; /*!< 0 => SHA-512, else SHA-384 */
43 }
44 mbedtls_sha512_sw_context;
45 
46 /**
47  * \brief Initialize SHA-512 context
48  *
49  * \param ctx SHA-512 context to be initialized
50  */
51 void mbedtls_sha512_sw_init( mbedtls_sha512_sw_context *ctx );
52 
53 /**
54  * \brief Clear SHA-512 context
55  *
56  * \param ctx SHA-512 context to be cleared
57  */
58 void mbedtls_sha512_sw_free( mbedtls_sha512_sw_context *ctx );
59 
60 /**
61  * \brief Clone (the state of) a SHA-512 context
62  *
63  * \param dst The destination context
64  * \param src The context to be cloned
65  */
66 void mbedtls_sha512_sw_clone( mbedtls_sha512_sw_context *dst,
67  const mbedtls_sha512_sw_context *src );
68 
69 /**
70  * \brief SHA-512 context setup
71  *
72  * \param ctx context to be initialized
73  * \param is384 0 = use SHA512, 1 = use SHA384
74  */
75 void mbedtls_sha512_sw_starts( mbedtls_sha512_sw_context *ctx, int is384 );
76 
77 /**
78  * \brief SHA-512 process buffer
79  *
80  * \param ctx SHA-512 context
81  * \param input buffer holding the data
82  * \param ilen length of the input data
83  */
84 void mbedtls_sha512_sw_update( mbedtls_sha512_sw_context *ctx, const unsigned char *input,
85  size_t ilen );
86 
87 /**
88  * \brief SHA-512 final digest
89  *
90  * \param ctx SHA-512 context
91  * \param output SHA-384/512 checksum result
92  */
93 void mbedtls_sha512_sw_finish( mbedtls_sha512_sw_context *ctx, unsigned char output[64] );
94 
95 /* Internal use */
96 void mbedtls_sha512_sw_process( mbedtls_sha512_sw_context *ctx, const unsigned char data[128] );
97 
98 #ifdef __cplusplus
99 }
100 #endif
101 
102 #endif /* MBEDTLS_SHA512_ALT */
103 
104 #endif /* sha512_alt_sw.h */
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