1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/* Module for providing SHA-2 hashing
*
* (C) 2003-2024 Anope Team
* Contact us at team@anope.org
*
* This program is free but copyrighted software; see the file COPYING for
* details.
*
*/
#include <climits>
#include <random>
#include "sha2/sha2.c"
#include "module.h"
#include "modules/encryption.h"
template <typename SHAContext,
void (* SHAInit)(SHAContext *),
void (* SHAUpdate)(SHAContext *, const unsigned char *, unsigned int),
void (* SHAFinal)(SHAContext *, unsigned char *)>
class SHA2Context final
: public Encryption::Context
{
private:
SHAContext context;
const size_t digest_size;
public:
SHA2Context(size_t ds)
: digest_size(ds)
{
SHAInit(&context);
}
void Update(const unsigned char *data, size_t len) override
{
SHAUpdate(&context, data, len);
}
Anope::string Finalize() override
{
std::vector<unsigned char> digest(digest_size);
SHAFinal(&context, digest.data());
return Anope::string(reinterpret_cast<const char *>(digest.data()), digest.size());
}
};
template <typename SHAContext,
void (* SHAInit)(SHAContext *),
void (* SHAUpdate)(SHAContext *, const unsigned char *, unsigned int),
void (* SHAFinal)(SHAContext *, unsigned char *)>
class SHA2Provider final
: public Encryption::Provider
{
public:
SHA2Provider(Module *creator, const Anope::string &algorithm, size_t bs, size_t ds)
: Encryption::Provider(creator, algorithm, bs, ds)
{
}
std::unique_ptr<Encryption::Context> CreateContext() override
{
return std::make_unique<SHA2Context<SHAContext, SHAInit, SHAUpdate, SHAFinal>>(this->digest_size);
}
};
class ESHA2 final
: public Module
{
private:
Encryption::Provider *defaultprovider = nullptr;
SHA2Provider<sha224_ctx, sha224_init, sha224_update, sha224_final> sha224provider;
SHA2Provider<sha256_ctx, sha256_init, sha256_update, sha256_final> sha256provider;
SHA2Provider<sha384_ctx, sha384_init, sha384_update, sha384_final> sha384provider;
SHA2Provider<sha512_ctx, sha512_init, sha512_update, sha512_final> sha512provider;
Anope::string GenerateKey(size_t keylen)
{
static std::random_device device;
static std::mt19937 engine(device());
static std::uniform_int_distribution<int> dist(CHAR_MIN, CHAR_MAX);
Anope::string keybuf(keylen, ' ');
for (size_t i = 0; i < keylen; ++i)
keybuf[i] = static_cast<char>(dist(engine));
return keybuf;
}
Encryption::Provider *GetAlgorithm(const Anope::string &algorithm)
{
if (algorithm == "sha224")
return &sha224provider;
if (algorithm == "sha256")
return &sha256provider;
if (algorithm == "sha384")
return &sha384provider;
if (algorithm == "sha512")
return &sha512provider;
return nullptr;
}
public:
ESHA2(const Anope::string &modname, const Anope::string &creator)
: Module(modname, creator, ENCRYPTION | VENDOR)
, sha224provider(this, "sha224", SHA224_BLOCK_SIZE, SHA224_DIGEST_SIZE)
, sha256provider(this, "sha256", SHA256_BLOCK_SIZE, SHA256_DIGEST_SIZE)
, sha384provider(this, "sha384", SHA384_BLOCK_SIZE, SHA384_DIGEST_SIZE)
, sha512provider(this, "sha512", SHA512_BLOCK_SIZE, SHA512_DIGEST_SIZE)
{
sha224provider.Check({
{ "d14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f", "" },
{ "730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525", "The quick brown fox jumps over the lazy dog" },
});
sha256provider.Check({
{ "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "" },
{ "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592", "The quick brown fox jumps over the lazy dog" },
});
sha384provider.Check({
{ "38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b", "" },
{ "ca737f1014a48f4c0b6dd43cb177b0afd9e5169367544c494011e3317dbf9a509cb1e5dc1e85a941bbee3d7f2afbc9b1", "The quick brown fox jumps over the lazy dog" },
});
sha512provider.Check({
{ "cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e", "" },
{ "07e547d9586f6a73f73fbac0435ed76951218fb7d0c8d788a309d785436bbb642e93a252a954f23912547d1e8a3b5ed6e1bfd7097821233fa0538f3db854fee6", "The quick brown fox jumps over the lazy dog" },
});
}
void OnReload(Configuration::Conf *conf) override
{
this->defaultprovider = GetAlgorithm(Config->GetModule(this)->Get<const Anope::string>("algorithm", "sha256"));
}
EventReturn OnEncrypt(const Anope::string &src, Anope::string &dest) override
{
if (!defaultprovider)
return EVENT_CONTINUE;
auto key = GenerateKey(defaultprovider->digest_size);
auto hmac = defaultprovider->HMAC(key, src);
auto enc = "hmac-" + defaultprovider->name + ":" + Anope::Hex(hmac) + ":" + Anope::Hex(key);
Log(LOG_DEBUG_2) << "(enc_sha2) hashed password from [" << src << "] to [" << enc << "]";
dest = enc;
return EVENT_ALLOW;
}
void OnCheckAuthentication(User *, IdentifyRequest *req) override
{
const auto *na = NickAlias::Find(req->GetAccount());
if (!na)
return;
NickCore *nc = na->nc;
auto apos = nc->pass.find(':');
if (apos == Anope::string::npos)
return;
Anope::string hash_method(nc->pass.begin(), nc->pass.begin() + apos);
bool is_hmac = !hash_method.compare(0, 5, "hmac-", 5);
if (!is_hmac && hash_method.compare(0, 4, "raw-", 4))
return; // Not a SHA-2 password.
auto provider = GetAlgorithm(hash_method.substr(is_hmac ? 5 : 4));
if (!provider)
return; // Not a hash for this module.
auto valid = false;
if (is_hmac)
{
auto bpos = nc->pass.find(':', apos + 1);
if (bpos == Anope::string::npos)
return; // No HMAC key.
Anope::string pass_hex(nc->pass.begin() + apos + 1, nc->pass.begin() + bpos);
Anope::string key_hex(nc->pass.begin() + bpos + 1, nc->pass.end());
Anope::string key;
Anope::Unhex(key_hex, key);
auto enc = Anope::Hex(provider->HMAC(key, req->GetPassword()));
valid = pass_hex.equals_cs(enc);
}
else
{
Anope::string pass_hex(nc->pass.begin() + apos + 1, nc->pass.end());
valid = provider->Compare(pass_hex, req->GetPassword());
}
if (valid)
{
// If we are NOT the first encryption module, the password is a raw
// hash, or the algorithm is different we want to re-encrypt the
// password with the primary encryption method.
if (ModuleManager::FindFirstOf(ENCRYPTION) != this || !is_hmac || provider != defaultprovider)
Anope::Encrypt(req->GetPassword(), nc->pass);
req->Success(this);
}
}
};
MODULE_INIT(ESHA2)
|
