libdecaf
Loading...
Searching...
No Matches
sha512.hxx
Go to the documentation of this file.
1
11#ifndef __DECAF_SHA512_HXX__
12#define __DECAF_SHA512_HXX__
13
15#include <decaf/sha512.h>
16#include <sys/types.h>
17
19#if __cplusplus >= 201103L
20 #define DECAF_NOEXCEPT noexcept
21#else
22 #define DECAF_NOEXCEPT throw()
23#endif
26namespace decaf {
27
29class SHA512 {
30protected:
33 decaf_sha512_ctx_t wrapped;
36public:
38 static const size_t OUTPUT_BYTES = 64;
39
41 static const size_t MAX_OUTPUT_BYTES = OUTPUT_BYTES;
42
44 static const size_t DEFAULT_OUTPUT_BYTES = OUTPUT_BYTES;
45
47 inline SHA512() DECAF_NOEXCEPT { decaf_sha512_init(wrapped); }
48
50 inline void update(const uint8_t *__restrict__ in, size_t len) DECAF_NOEXCEPT { decaf_sha512_update(wrapped,in,len); }
51
53 inline void update(const Block &s) DECAF_NOEXCEPT { update(s.data(),s.size()); }
54
56 inline SHA512 &operator<<(const Block &s) { update(s); return *this; }
57
59 inline SHA512 &operator+=(const Block &s) { return *this << s; }
60
62 inline void final(Buffer b) /*throw(LengthException)*/ {
63 if (b.size() > OUTPUT_BYTES) throw LengthException();
64 decaf_sha512_final(wrapped,b.data(),b.size());
65 }
66
68 inline void reset() DECAF_NOEXCEPT { decaf_sha512_init(wrapped); }
69
71 inline SecureBuffer final(size_t len = OUTPUT_BYTES) /*throw(LengthException)*/ {
72 if (len > OUTPUT_BYTES) throw LengthException();
74 decaf_sha512_final(wrapped,buffer.data(),len);
75 return buffer;
76 }
77
80
83
85 static inline SecureBuffer hash (
86 const Block &message,
87 size_t outlen = OUTPUT_BYTES
88 ) /*throw(LengthException, std::bad_alloc)*/ {
89 if (outlen > OUTPUT_BYTES) throw LengthException();
91 decaf_sha512_hash(buffer.data(),outlen,message.data(),message.size());
92 return buffer;
93 }
94
96 inline ~SHA512() DECAF_NOEXCEPT { decaf_sha512_destroy(wrapped); }
97};
98
99} /* namespace decaf */
100
101#undef DECAF_NOEXCEPT
102
103#endif /* __DECAF_SHA512_HXX__ */
A reference to a block of data, which (when accessed through this base class) is const.
Definition secure_buffer.hxx:159
const unsigned char * data() const DECAF_NOEXCEPT
Get const data.
Definition secure_buffer.hxx:199
size_t size() const DECAF_NOEXCEPT
Get the size.
Definition secure_buffer.hxx:208
A reference to a writable block of data.
Definition secure_buffer.hxx:270
A fixed-size block.
Definition secure_buffer.hxx:253
An exception for when crypto (ie point decode) has failed.
Definition secure_buffer.hxx:126
SHA512 wrapper function.
Definition sha512.hxx:29
SHA512 & operator<<(const Block &s)
Add more data, stream version.
Definition sha512.hxx:56
static SecureBuffer hash(const Block &message, size_t outlen=OUTPUT_BYTES)
Hash a message in one pass.
Definition sha512.hxx:85
void reset() DECAF_NOEXCEPT
Resets the SHA context.
Definition sha512.hxx:68
static const size_t DEFAULT_OUTPUT_BYTES
Default number of bytes to output.
Definition sha512.hxx:44
void update(const uint8_t *__restrict__ in, size_t len) DECAF_NOEXCEPT
Add more data to running hash.
Definition sha512.hxx:50
void update(const Block &s) DECAF_NOEXCEPT
Add more data to running hash, C++ version.
Definition sha512.hxx:53
size_t max_output_size() const DECAF_NOEXCEPT
Return the sponge's maximum output size.
Definition sha512.hxx:82
~SHA512() DECAF_NOEXCEPT
Destructor zeroizes state.
Definition sha512.hxx:96
static const size_t OUTPUT_BYTES
Number of bytes ouf output.
Definition sha512.hxx:38
SHA512 & operator+=(const Block &s)
Same as <<.
Definition sha512.hxx:59
size_t default_output_size() const DECAF_NOEXCEPT
Return the sponge's default output size.
Definition sha512.hxx:79
static const size_t MAX_OUTPUT_BYTES
Number of bytes of output.
Definition sha512.hxx:41
SHA512() DECAF_NOEXCEPT
Constructor.
Definition sha512.hxx:47
Namespace for all C++ decaf objects.
Definition decaf.hxx:22
std::vector< unsigned char, SanitizingAllocator< unsigned char, 0 > > SecureBuffer
A variant of std::vector which securely zerozes its state when destructed.
Definition secure_buffer.hxx:79
C++ self-zeroizing buffer.