summaryrefslogtreecommitdiffstats
path: root/libparc/parc/security/parc_CryptoHash.c
blob: 3fc40b1636b401b2b70b65d282805aa33b695cf0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @header parcCryptoHash.c
 * <#Abstract#>
 *
 *     <#Discussion#>
 *
 *
 * Example:
 * @code
 * <#example#>
 * @endcode
 */
#include <config.h>
#include <stdio.h>

#include <LongBow/runtime.h>

#include <parc/security/parc_CryptoHash.h>
#include <parc/algol/parc_Memory.h>

#include <parc/algol/parc_Object.h>

struct parc_crypto_hash {
    PARCCryptoHashType type;
    PARCBuffer *digestBuffer;
};

static bool
_parcCryptoHash_FinalRelease(PARCCryptoHash **hashP)
{
    PARCCryptoHash *hash = (PARCCryptoHash *) *hashP;
    if (hash->digestBuffer != NULL) {
        parcBuffer_Release(&hash->digestBuffer);
    }
    return true;
}

parcObject_Override(PARCCryptoHash, PARCObject,
                    .destructor = (PARCObjectDestructor *) _parcCryptoHash_FinalRelease,
                    .equals = (PARCObjectEquals *) parcCryptoHash_Equals);

parcObject_ImplementAcquire(parcCryptoHash, PARCCryptoHash);

parcObject_ImplementRelease(parcCryptoHash, PARCCryptoHash);

PARCCryptoHash *
parcCryptoHash_Create(PARCCryptoHashType digestType, const PARCBuffer *digestBuffer)
{
    PARCCryptoHash *parcDigest = parcObject_CreateInstance(PARCCryptoHash);
    assertNotNull(parcDigest, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(PARCCryptoHash));
    parcDigest->type = digestType;

    parcDigest->digestBuffer = parcBuffer_Acquire((PARCBuffer *) digestBuffer); // casting to un-const

    return parcDigest;
}

/**
 * Create a digest, copying the buffer
 *
 * Example:
 * @code
 * <#example#>
 * @endcode
 */
PARCCryptoHash *
parcCryptoHash_CreateFromArray(PARCCryptoHashType digestType, const void *buffer, size_t length)
{
    PARCCryptoHash *parcDigest = parcObject_CreateInstance(PARCCryptoHash);
    assertNotNull(parcDigest, "parcMemory_AllocateAndClear(%zu) returned NULL", sizeof(PARCCryptoHash));
    parcDigest->type = digestType;

    // create a reference counted copy
    parcDigest->digestBuffer =
        parcBuffer_Flip(parcBuffer_PutArray(parcBuffer_Allocate(length), length, buffer));

    return parcDigest;
}

/**
 * Returns the digest algorithm.
 *
 * Example:
 * @code
 * <#example#>
 * @endcode
 */
PARCCryptoHashType
parcCryptoHash_GetDigestType(const PARCCryptoHash *parcDigest)
{
    assertNotNull(parcDigest, "Parameter must be non-null");
    return parcDigest->type;
}

bool
parcCryptoHash_Equals(const PARCCryptoHash *a, const PARCCryptoHash *b)
{
    if (a == b) {
        return true;
    }
    if (a == NULL || b == NULL) {
        return false;
    }

    if (a->type == b->type) {
        if (parcBuffer_Equals(a->digestBuffer, b->digestBuffer)) {
            return true;
        }
    }

    return false;
}

PARCBuffer *
parcCryptoHash_GetDigest(const PARCCryptoHash *parcDigest)
{
    assertNotNull(parcDigest, "Parameter must be non-null");
    return parcDigest->digestBuffer;
}