Botan: src/algo_base/symkey.h Source File

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symkey.h
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1 /*
2 * OctetString
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7
8 #ifndef BOTAN_SYMKEY_H__
9 #define BOTAN_SYMKEY_H__
10
11 #include <botan/secmem.h>
12 #include <string>
13
14 namespace Botan {
15
16 /**
17 * Octet String
18 */
19 class BOTAN_DLL OctetString
20 {
21 public:
22 /**
23 * @return size of this octet string in bytes
24 */
25 size_t length() const { return bits.size(); }
26
27 /**
28 * @return this object as a SecureVector<byte>
29 */
30 SecureVector<byte> bits_of() const { return bits; }
31
32 /**
33 * @return start of this string
34 */
35 const byte* begin() const { return &bits[0]; }
36
37 /**
38 * @return end of this string
39 */
40 const byte* end() const { return &bits[bits.size()]; }
41
42 /**
43 * @return this encoded as hex
44 */
45 std::string as_string() const;
46
47 /**
48 * XOR the contents of another octet string into this one
49 * @param other octet string
50 * @return reference to this
51 */
52 OctetString& operator^=(const OctetString& other);
53
54 /**
55 * Force to have odd parity
56 */
57 void set_odd_parity();
58
59 /**
60 * Change the contents of this octet string
61 * @param hex_string a hex encoded bytestring
62 */
63 void change(const std::string& hex_string);
64
65 /**
66 * Change the contents of this octet string
67 * @param in the input
68 * @param length of in in bytes
69 */
70 void change(const byte in[], size_t length);
71
72 /**
73 * Change the contents of this octet string
74 * @param in the input
75 */
76 void change(const MemoryRegion<byte>& in) { bits = in; }
77
78 /**
79 * Create a new random OctetString
80 * @param rng is a random number generator
81 * @param len is the desired length in bytes
82 */
83 OctetString(class RandomNumberGenerator& rng, size_t len);
84
85 /**
86 * Create a new OctetString
87 * @param str is a hex encoded string
88 */
89 OctetString(const std::string& str = "") { change(str); }
90
91 /**
92 * Create a new OctetString
93 * @param in is an array
94 * @param len is the length of in in bytes
95 */
96 OctetString(const byte in[], size_t len) { change(in, len); }
97
98 /**
99 * Create a new OctetString
100 * @param in a bytestring
101 */
102 OctetString(const MemoryRegion<byte>& in) { change(in); }
103 private:
104 SecureVector<byte> bits;
105 };
106
107 /**
108 * Compare two strings
109 * @param x an octet string
110 * @param y an octet string
111 * @return if x is equal to y
112 */
113 BOTAN_DLL bool operator==(const OctetString& x,
114 const OctetString& y);
115
116 /**
117 * Compare two strings
118 * @param x an octet string
119 * @param y an octet string
120 * @return if x is not equal to y
121 */
122 BOTAN_DLL bool operator!=(const OctetString& x,
123 const OctetString& y);
124
125 /**
126 * Concatenate two strings
127 * @param x an octet string
128 * @param y an octet string
129 * @return x concatenated with y
130 */
131 BOTAN_DLL OctetString operator+(const OctetString& x,
132 const OctetString& y);
133
134 /**
135 * XOR two strings
136 * @param x an octet string
137 * @param y an octet string
138 * @return x XORed with y
139 */
140 BOTAN_DLL OctetString operator^(const OctetString& x,
141 const OctetString& y);
142
143
144 /**
145 * Alternate name for octet string showing intent to use as a key
146 */
147 typedef OctetString SymmetricKey;
148
149 /**
150 * Alternate name for octet string showing intent to use as an IV
151 */
152 typedef OctetString InitializationVector;
153
154 }
155
156 #endif
Botan::OctetString::OctetString
OctetString(const byte in[], size_t len)
Definition: symkey.h:96
Botan::operator!=
bool operator!=(const OctetString &s1, const OctetString &s2)
Definition: symkey.cpp:106
Botan::OctetString
Definition: symkey.h:19
Botan::RandomNumberGenerator
Definition: rng.h:20
Botan::OctetString::end
const byte * end() const
Definition: symkey.h:40
Botan::OctetString::OctetString
OctetString(const MemoryRegion< byte > &in)
Definition: symkey.h:102
Botan::operator==
bool operator==(const OctetString &s1, const OctetString &s2)
Definition: symkey.cpp:98
Botan::OctetString::length
size_t length() const
Definition: symkey.h:25
Botan::operator^
OctetString operator^(const OctetString &k1, const OctetString &k2)
Definition: symkey.cpp:125
Botan::byte
unsigned char byte
Definition: types.h:22
Botan::SymmetricKey
OctetString SymmetricKey
Definition: symkey.h:147
Botan::OctetString::bits_of
SecureVector< byte > bits_of() const
Definition: symkey.h:30
Botan::operator+
OctetString operator+(const OctetString &k1, const OctetString &k2)
Definition: symkey.cpp:114
Botan::OctetString::begin
const byte * begin() const
Definition: symkey.h:35
Botan::OctetString::OctetString
OctetString(const std::string &str="")
Definition: symkey.h:89
Botan::MemoryRegion< byte >
Botan
Definition: algo_base.h:14
Botan::OctetString::change
void change(const MemoryRegion< byte > &in)
Definition: symkey.h:76
Botan::SecureVector< byte >
Botan::InitializationVector
OctetString InitializationVector
Definition: symkey.h:152