/src/botan/src/lib/base/symkey.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * OctetString |
3 | | * (C) 1999-2007 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #include <botan/symkey.h> |
9 | | #include <botan/rng.h> |
10 | | #include <botan/hex.h> |
11 | | #include <algorithm> |
12 | | |
13 | | namespace Botan { |
14 | | |
15 | | /* |
16 | | * Create an OctetString from RNG output |
17 | | */ |
18 | | OctetString::OctetString(RandomNumberGenerator& rng, |
19 | | size_t len) |
20 | 0 | { |
21 | 0 | rng.random_vec(m_data, len); |
22 | 0 | } |
23 | | |
24 | | /* |
25 | | * Create an OctetString from a hex string |
26 | | */ |
27 | | OctetString::OctetString(const std::string& hex_string) |
28 | 69.3k | { |
29 | 69.3k | if(!hex_string.empty()) |
30 | 47.7k | { |
31 | 47.7k | m_data.resize(1 + hex_string.length() / 2); |
32 | 47.7k | m_data.resize(hex_decode(m_data.data(), hex_string)); |
33 | 47.7k | } |
34 | 69.3k | } |
35 | | |
36 | | /* |
37 | | * Create an OctetString from a byte string |
38 | | */ |
39 | | OctetString::OctetString(const uint8_t in[], size_t n) |
40 | 0 | { |
41 | 0 | m_data.assign(in, in + n); |
42 | 0 | } |
43 | | |
44 | | /* |
45 | | * Set the parity of each key byte to odd |
46 | | */ |
47 | | void OctetString::set_odd_parity() |
48 | 0 | { |
49 | 0 | const uint8_t ODD_PARITY[256] = { |
50 | 0 | 0x01, 0x01, 0x02, 0x02, 0x04, 0x04, 0x07, 0x07, 0x08, 0x08, 0x0B, 0x0B, |
51 | 0 | 0x0D, 0x0D, 0x0E, 0x0E, 0x10, 0x10, 0x13, 0x13, 0x15, 0x15, 0x16, 0x16, |
52 | 0 | 0x19, 0x19, 0x1A, 0x1A, 0x1C, 0x1C, 0x1F, 0x1F, 0x20, 0x20, 0x23, 0x23, |
53 | 0 | 0x25, 0x25, 0x26, 0x26, 0x29, 0x29, 0x2A, 0x2A, 0x2C, 0x2C, 0x2F, 0x2F, |
54 | 0 | 0x31, 0x31, 0x32, 0x32, 0x34, 0x34, 0x37, 0x37, 0x38, 0x38, 0x3B, 0x3B, |
55 | 0 | 0x3D, 0x3D, 0x3E, 0x3E, 0x40, 0x40, 0x43, 0x43, 0x45, 0x45, 0x46, 0x46, |
56 | 0 | 0x49, 0x49, 0x4A, 0x4A, 0x4C, 0x4C, 0x4F, 0x4F, 0x51, 0x51, 0x52, 0x52, |
57 | 0 | 0x54, 0x54, 0x57, 0x57, 0x58, 0x58, 0x5B, 0x5B, 0x5D, 0x5D, 0x5E, 0x5E, |
58 | 0 | 0x61, 0x61, 0x62, 0x62, 0x64, 0x64, 0x67, 0x67, 0x68, 0x68, 0x6B, 0x6B, |
59 | 0 | 0x6D, 0x6D, 0x6E, 0x6E, 0x70, 0x70, 0x73, 0x73, 0x75, 0x75, 0x76, 0x76, |
60 | 0 | 0x79, 0x79, 0x7A, 0x7A, 0x7C, 0x7C, 0x7F, 0x7F, 0x80, 0x80, 0x83, 0x83, |
61 | 0 | 0x85, 0x85, 0x86, 0x86, 0x89, 0x89, 0x8A, 0x8A, 0x8C, 0x8C, 0x8F, 0x8F, |
62 | 0 | 0x91, 0x91, 0x92, 0x92, 0x94, 0x94, 0x97, 0x97, 0x98, 0x98, 0x9B, 0x9B, |
63 | 0 | 0x9D, 0x9D, 0x9E, 0x9E, 0xA1, 0xA1, 0xA2, 0xA2, 0xA4, 0xA4, 0xA7, 0xA7, |
64 | 0 | 0xA8, 0xA8, 0xAB, 0xAB, 0xAD, 0xAD, 0xAE, 0xAE, 0xB0, 0xB0, 0xB3, 0xB3, |
65 | 0 | 0xB5, 0xB5, 0xB6, 0xB6, 0xB9, 0xB9, 0xBA, 0xBA, 0xBC, 0xBC, 0xBF, 0xBF, |
66 | 0 | 0xC1, 0xC1, 0xC2, 0xC2, 0xC4, 0xC4, 0xC7, 0xC7, 0xC8, 0xC8, 0xCB, 0xCB, |
67 | 0 | 0xCD, 0xCD, 0xCE, 0xCE, 0xD0, 0xD0, 0xD3, 0xD3, 0xD5, 0xD5, 0xD6, 0xD6, |
68 | 0 | 0xD9, 0xD9, 0xDA, 0xDA, 0xDC, 0xDC, 0xDF, 0xDF, 0xE0, 0xE0, 0xE3, 0xE3, |
69 | 0 | 0xE5, 0xE5, 0xE6, 0xE6, 0xE9, 0xE9, 0xEA, 0xEA, 0xEC, 0xEC, 0xEF, 0xEF, |
70 | 0 | 0xF1, 0xF1, 0xF2, 0xF2, 0xF4, 0xF4, 0xF7, 0xF7, 0xF8, 0xF8, 0xFB, 0xFB, |
71 | 0 | 0xFD, 0xFD, 0xFE, 0xFE }; |
72 | 0 |
|
73 | 0 | for(size_t j = 0; j != m_data.size(); ++j) |
74 | 0 | m_data[j] = ODD_PARITY[m_data[j]]; |
75 | 0 | } |
76 | | |
77 | | /* |
78 | | * Hex encode an OctetString |
79 | | */ |
80 | | std::string OctetString::to_string() const |
81 | 0 | { |
82 | 0 | return hex_encode(m_data.data(), m_data.size()); |
83 | 0 | } |
84 | | |
85 | | /* |
86 | | * XOR Operation for OctetStrings |
87 | | */ |
88 | | OctetString& OctetString::operator^=(const OctetString& k) |
89 | 0 | { |
90 | 0 | if(&k == this) { zeroise(m_data); return (*this); } |
91 | 0 | xor_buf(m_data.data(), k.begin(), std::min(length(), k.length())); |
92 | 0 | return (*this); |
93 | 0 | } |
94 | | |
95 | | /* |
96 | | * Equality Operation for OctetStrings |
97 | | */ |
98 | | bool operator==(const OctetString& s1, const OctetString& s2) |
99 | 0 | { |
100 | 0 | return (s1.bits_of() == s2.bits_of()); |
101 | 0 | } |
102 | | |
103 | | /* |
104 | | * Unequality Operation for OctetStrings |
105 | | */ |
106 | | bool operator!=(const OctetString& s1, const OctetString& s2) |
107 | 0 | { |
108 | 0 | return !(s1 == s2); |
109 | 0 | } |
110 | | |
111 | | /* |
112 | | * Append Operation for OctetStrings |
113 | | */ |
114 | | OctetString operator+(const OctetString& k1, const OctetString& k2) |
115 | 0 | { |
116 | 0 | secure_vector<uint8_t> out; |
117 | 0 | out += k1.bits_of(); |
118 | 0 | out += k2.bits_of(); |
119 | 0 | return OctetString(out); |
120 | 0 | } |
121 | | |
122 | | /* |
123 | | * XOR Operation for OctetStrings |
124 | | */ |
125 | | OctetString operator^(const OctetString& k1, const OctetString& k2) |
126 | 0 | { |
127 | 0 | secure_vector<uint8_t> out(std::max(k1.length(), k2.length())); |
128 | 0 |
|
129 | 0 | copy_mem(out.data(), k1.begin(), k1.length()); |
130 | 0 | xor_buf(out.data(), k2.begin(), k2.length()); |
131 | 0 | return OctetString(out); |
132 | 0 | } |
133 | | |
134 | | } |