Arduino Cryptography Library
SHA512.h
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22 
23 #ifndef CRYPTO_SHA512_h
24 #define CRYPTO_SHA512_h
25 
26 #include "Hash.h"
27 
28 class Ed25519;
29 
30 class SHA512 : public Hash
31 {
32 public:
33  SHA512();
34  virtual ~SHA512();
35 
36  size_t hashSize() const;
37  size_t blockSize() const;
38 
39  void reset();
40  void update(const void *data, size_t len);
41  void finalize(void *hash, size_t len);
42 
43  void clear();
44 
45  void resetHMAC(const void *key, size_t keyLen);
46  void finalizeHMAC(const void *key, size_t keyLen, void *hash, size_t hashLen);
47 
48  static const size_t HASH_SIZE = 64;
49  static const size_t BLOCK_SIZE = 128;
50 
51 protected:
52  struct {
53  uint64_t h[8];
54  uint64_t w[16];
55  uint64_t lengthLow;
56  uint64_t lengthHigh;
57  uint8_t chunkSize;
58  } state;
59 
60  void processChunk();
61 
62  friend class Ed25519;
63 };
64 
65 #endif
Digital signatures based on the elliptic curve modulo 2^255 - 19.
Definition: Ed25519.h:30
Abstract base class for cryptographic hash algorithms.
Definition: Hash.h:30
SHA-512 hash algorithm.
Definition: SHA512.h:31
void clear()
Clears the hash state, removing all sensitive data, and then resets the hash ready for a new hashing ...
Definition: SHA512.cpp:147
void reset()
Resets the hash ready for a new hashing process.
Definition: SHA512.cpp:76
void finalizeHMAC(const void *key, size_t keyLen, void *hash, size_t hashLen)
Finalizes the HMAC hashing process and returns the hash.
Definition: SHA512.cpp:160
void resetHMAC(const void *key, size_t keyLen)
Resets the hash ready for a new HMAC hashing process.
Definition: SHA512.cpp:153
static const size_t BLOCK_SIZE
Constant for the block size of SHA512.
Definition: SHA512.h:49
SHA512()
Constructs a SHA-512 hash object.
Definition: SHA512.cpp:52
virtual ~SHA512()
Destroys this SHA-512 hash object after clearing sensitive information.
Definition: SHA512.cpp:61
void update(const void *data, size_t len)
Updates the hash with more data.
Definition: SHA512.cpp:89
size_t hashSize() const
Size of the hash result from finalize().
Definition: SHA512.cpp:66
static const size_t HASH_SIZE
Constant for the size of the hash output of SHA512.
Definition: SHA512.h:48
void processChunk()
Processes a single 1024-bit chunk with the core SHA-512 algorithm.
Definition: SHA512.cpp:177
size_t blockSize() const
Size of the internal block used by the hash algorithm.
Definition: SHA512.cpp:71
void finalize(void *hash, size_t len)
Finalizes the hashing process and returns the hash.
Definition: SHA512.cpp:115