Botan  2.17.2
Crypto and TLS for C++11
sha2_32.h
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1 /*
2 * SHA-{224,256}
3 * (C) 1999-2011 Jack Lloyd
4 * 2007 FlexSecure GmbH
5 *
6 * Botan is released under the Simplified BSD License (see license.txt)
7 */
8 
9 #ifndef BOTAN_SHA_224_256_H_
10 #define BOTAN_SHA_224_256_H_
11 
12 #include <botan/mdx_hash.h>
13 
15 
16 namespace Botan {
17 
18 /**
19 * SHA-224
20 */
22  {
23  public:
24  std::string name() const override { return "SHA-224"; }
25  size_t output_length() const override { return 28; }
26  HashFunction* clone() const override { return new SHA_224; }
27  std::unique_ptr<HashFunction> copy_state() const override;
28 
29  void clear() override;
30 
31  std::string provider() const override;
32 
33  SHA_224() : MDx_HashFunction(64, true, true), m_digest(8)
34  { clear(); }
35  private:
36  void compress_n(const uint8_t[], size_t blocks) override;
37  void copy_out(uint8_t[]) override;
38 
39  secure_vector<uint32_t> m_digest;
40  };
41 
42 /**
43 * SHA-256
44 */
46  {
47  public:
48  std::string name() const override { return "SHA-256"; }
49  size_t output_length() const override { return 32; }
50  HashFunction* clone() const override { return new SHA_256; }
51  std::unique_ptr<HashFunction> copy_state() const override;
52 
53  void clear() override;
54 
55  std::string provider() const override;
56 
57  SHA_256() : MDx_HashFunction(64, true, true), m_digest(8)
58  { clear(); }
59 
60  /*
61  * Perform a SHA-256 compression. For internal use
62  */
63  static void compress_digest(secure_vector<uint32_t>& digest,
64  const uint8_t input[],
65  size_t blocks);
66 
67  private:
68 
69 #if defined(BOTAN_HAS_SHA2_32_ARMV8)
70  static void compress_digest_armv8(secure_vector<uint32_t>& digest,
71  const uint8_t input[],
72  size_t blocks);
73 #endif
74 
75 #if defined(BOTAN_HAS_SHA2_32_X86_BMI2)
76  static void compress_digest_x86_bmi2(secure_vector<uint32_t>& digest,
77  const uint8_t input[],
78  size_t blocks);
79 #endif
80 
81 #if defined(BOTAN_HAS_SHA2_32_X86)
82  static void compress_digest_x86(secure_vector<uint32_t>& digest,
83  const uint8_t input[],
84  size_t blocks);
85 #endif
86 
87  void compress_n(const uint8_t[], size_t blocks) override;
88  void copy_out(uint8_t[]) override;
89 
90  secure_vector<uint32_t> m_digest;
91  };
92 
93 }
94 
95 #endif
std::string name() const override
Definition: sha2_32.h:24
void clear() override
Definition: mdx_hash.cpp:41
std::string name() const override
Definition: sha2_32.h:48
int(* final)(unsigned char *, CTX *)
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
HashFunction * clone() const override
Definition: sha2_32.h:50
HashFunction * clone() const override
Definition: sha2_32.h:26
virtual void compress_n(const uint8_t blocks[], size_t block_n)=0
virtual void copy_out(uint8_t buffer[])=0
virtual std::string provider() const
Definition: hash.h:58
size_t output_length() const override
Definition: sha2_32.h:25
Definition: alg_id.cpp:13
std::vector< T, secure_allocator< T > > secure_vector
Definition: secmem.h:65
virtual std::unique_ptr< HashFunction > copy_state() const =0
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:136
size_t output_length() const override
Definition: sha2_32.h:49