Crypto++  5.6.5
Free C++ class library of cryptographic schemes
hex.cpp
1 // hex.cpp - originally written and placed in the public domain by Wei Dai
2 
3 #include "pch.h"
4 
5 #ifndef CRYPTOPP_IMPORTS
6 
7 #include "hex.h"
8 
9 NAMESPACE_BEGIN(CryptoPP)
10 ANONYMOUS_NAMESPACE_BEGIN
11 
12 const byte s_vecUpper[] = "0123456789ABCDEF";
13 const byte s_vecLower[] = "0123456789abcdef";
14 const int s_array[256] = {
15  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
16  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
17  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
18  0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
19  -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
20  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
21  -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
22  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
23  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
24  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
25  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
26  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
27  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
28  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
29  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
30  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
31 };
32 
33 ANONYMOUS_NAMESPACE_END
34 
36 {
37  bool uppercase = parameters.GetValueWithDefault(Name::Uppercase(), true);
38  m_filter->Initialize(CombinedNameValuePairs(
39  parameters,
40  MakeParameters(Name::EncodingLookupArray(), uppercase ? &s_vecUpper[0] : &s_vecLower[0], false)(Name::Log2Base(), 4, true)));
41 }
42 
44 {
46  parameters,
47  MakeParameters(Name::DecodingLookupArray(), GetDefaultDecodingLookupArray(), false)(Name::Log2Base(), 4, true)));
48 }
49 
50 // Unrolled initialization, http://github.com/weidai11/cryptopp/issues/376
51 const int *HexDecoder::GetDefaultDecodingLookupArray()
52 {
53  return s_array;
54 }
55 
56 NAMESPACE_END
57 
58 #endif // CRYPTOPP_IMPORTS
const char * Uppercase()
bool
Definition: argnames.h:70
T GetValueWithDefault(const char *name, T defaultValue) const
Get a named value.
Definition: cryptlib.h:361
Combines two sets of NameValuePairs.
Definition: algparam.h:134
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: hex.cpp:35
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: basecode.cpp:115
AlgorithmParameters MakeParameters(const char *name, const T &value, bool throwIfNotUsed=true)
Create an object that implements NameValuePairs.
Definition: algparam.h:509
const char * EncodingLookupArray()
const byte *
Definition: argnames.h:75
Classes for HexEncoder and HexDecoder.
const char * Log2Base()
int
Definition: argnames.h:74
const char * DecodingLookupArray()
const byte *
Definition: argnames.h:76
Crypto++ library namespace.
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: hex.cpp:43
Interface for retrieving values given their names.
Definition: cryptlib.h:291