18409242756

Committed 10 Oct 2025 02:16PM UTC coverage: 19.38% (-44.8%) from 64.13%

Build # 18409242756

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Commit Message

Merge pull request #16245 from miodvallat/matriochka_exception

auth: yet another logic botch

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87.95

/pdns/burtle.hh

/*
 * This file is part of PowerDNS or dnsdist.
 * Copyright -- PowerDNS.COM B.V. and its contributors
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * In addition, for the avoidance of any doubt, permission is granted to
 * link this program with OpenSSL and to (re)distribute the binaries
 * produced as the result of such linking.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#pragma once

#include <cinttypes>

inline void burtlemix(uint32_t& a, uint32_t& b, uint32_t& c)
{
  a -= b;
  a -= c;
  a ^= (c >> 13);
  b -= c;
  b -= a;
  b ^= (a << 8);
  c -= a;
  c -= b;
  c ^= (b >> 13);
  a -= b;
  a -= c;
  a ^= (c >> 12);
  b -= c;
  b -= a;
  b ^= (a << 16);
  c -= a;
  c -= b;
  c ^= (b >> 5);
  a -= b;
  a -= c;
  a ^= (c >> 3);
  b -= c;
  b -= a;
  b ^= (a << 10);
  c -= a;
  c -= b;
  c ^= (b >> 15);
}

inline uint32_t burtle(const unsigned char* k, uint32_t length, uint32_t initval)
{
  uint32_t a, b, c, len;

  /* Set up the internal state */
  len = length;
  a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */
  c = initval; /* the previous hash value */

  /*---------------------------------------- handle most of the key */
  while (len >= 12) {
    a += (k[0] + ((uint32_t)k[1] << 8) + ((uint32_t)k[2] << 16) + ((uint32_t)k[3] << 24));
    b += (k[4] + ((uint32_t)k[5] << 8) + ((uint32_t)k[6] << 16) + ((uint32_t)k[7] << 24));
    c += (k[8] + ((uint32_t)k[9] << 8) + ((uint32_t)k[10] << 16) + ((uint32_t)k[11] << 24));
    burtlemix(a, b, c);
    k += 12;
    len -= 12;
  }

  /*------------------------------------- handle the last 11 bytes */
  c += length;
  switch (len) { /* all the case statements fall through */
  case 11:
    c += ((uint32_t)k[10] << 24);
    /* fall-through */
  case 10:
    c += ((uint32_t)k[9] << 16);
    /* fall-through */
  case 9:
    c += ((uint32_t)k[8] << 8);
    /* the first byte of c is reserved for the length */
    /* fall-through */
  case 8:
    b += ((uint32_t)k[7] << 24);
    /* fall-through */
  case 7:
    b += ((uint32_t)k[6] << 16);
    /* fall-through */
  case 6:
    b += ((uint32_t)k[5] << 8);
    /* fall-through */
  case 5:
    b += k[4];
    /* fall-through */
  case 4:
    a += ((uint32_t)k[3] << 24);
    /* fall-through */
  case 3:
    a += ((uint32_t)k[2] << 16);
    /* fall-through */
  case 2:
    a += ((uint32_t)k[1] << 8);
    /* fall-through */
  case 1:
    a += k[0];
    /* case 0: nothing left to add */
  }
  burtlemix(a, b, c);
  /*-------------------------------------------- report the result */
  return c;
}

inline uint32_t burtleCI(const unsigned char* k, uint32_t length, uint32_t initval)
{
  uint32_t a, b, c, len;

  /* Set up the internal state */
  len = length;
  a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */
  c = initval; /* the previous hash value */

  /*---------------------------------------- handle most of the key */
  while (len >= 12) {
    a += (dns_tolower(k[0]) + ((uint32_t)dns_tolower(k[1]) << 8) + ((uint32_t)dns_tolower(k[2]) << 16) + ((uint32_t)dns_tolower(k[3]) << 24));
    b += (dns_tolower(k[4]) + ((uint32_t)dns_tolower(k[5]) << 8) + ((uint32_t)dns_tolower(k[6]) << 16) + ((uint32_t)dns_tolower(k[7]) << 24));
    c += (dns_tolower(k[8]) + ((uint32_t)dns_tolower(k[9]) << 8) + ((uint32_t)dns_tolower(k[10]) << 16) + ((uint32_t)dns_tolower(k[11]) << 24));
    burtlemix(a, b, c);
    k += 12;
    len -= 12;
  }

  /*------------------------------------- handle the last 11 bytes */
  c += length;
  switch (len) { /* all the case statements fall through */
  case 11:
    c += ((uint32_t)dns_tolower(k[10]) << 24);
    /* fall-through */
  case 10:
    c += ((uint32_t)dns_tolower(k[9]) << 16);
    /* fall-through */
  case 9:
    c += ((uint32_t)dns_tolower(k[8]) << 8);
    /* the first byte of c is reserved for the length */
    /* fall-through */
  case 8:
    b += ((uint32_t)dns_tolower(k[7]) << 24);
    /* fall-through */
  case 7:
    b += ((uint32_t)dns_tolower(k[6]) << 16);
    /* fall-through */
  case 6:
    b += ((uint32_t)dns_tolower(k[5]) << 8);
    /* fall-through */
  case 5:
    b += dns_tolower(k[4]);
    /* fall-through */
  case 4:
    a += ((uint32_t)dns_tolower(k[3]) << 24);
    /* fall-through */
  case 3:
    a += ((uint32_t)dns_tolower(k[2]) << 16);
    /* fall-through */
  case 2:
    a += ((uint32_t)dns_tolower(k[1]) << 8);
    /* fall-through */
  case 1:
    a += dns_tolower(k[0]);
    /* case 0: nothing left to add */
  }
  burtlemix(a, b, c);
  /*-------------------------------------------- report the result */
  return c;
}

template <typename T>
inline uint32_t burtleCI(const T& k, uint32_t initval)
{
  return burtleCI(reinterpret_cast<const unsigned char*>(k.data()), k.length(), initval); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast): can't static_cast because of sign difference
}

1	/*
2	* This file is part of PowerDNS or dnsdist.
3	* Copyright -- PowerDNS.COM B.V. and its contributors
4	*
5	* This program is free software; you can redistribute it and/or modify
6	* it under the terms of version 2 of the GNU General Public License as
7	* published by the Free Software Foundation.
8	*
9	* In addition, for the avoidance of any doubt, permission is granted to
10	* link this program with OpenSSL and to (re)distribute the binaries
11	* produced as the result of such linking.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21	*/
22
23	#pragma once
24
25	#include <cinttypes>
26
27	inline void burtlemix(uint32_t& a, uint32_t& b, uint32_t& c)
28	{	155,847✔
29	a -= b;	155,847✔
30	a -= c;	155,847✔
31	a ^= (c >> 13);	155,847✔
32	b -= c;	155,847✔
33	b -= a;	155,847✔
34	b ^= (a << 8);	155,847✔
35	c -= a;	155,847✔
36	c -= b;	155,847✔
37	c ^= (b >> 13);	155,847✔
38	a -= b;	155,847✔
39	a -= c;	155,847✔
40	a ^= (c >> 12);	155,847✔
41	b -= c;	155,847✔
42	b -= a;	155,847✔
43	b ^= (a << 16);	155,847✔
44	c -= a;	155,847✔
45	c -= b;	155,847✔
46	c ^= (b >> 5);	155,847✔
47	a -= b;	155,847✔
48	a -= c;	155,847✔
49	a ^= (c >> 3);	155,847✔
50	b -= c;	155,847✔
51	b -= a;	155,847✔
52	b ^= (a << 10);	155,847✔
53	c -= a;	155,847✔
54	c -= b;	155,847✔
55	c ^= (b >> 15);	155,847✔
56	}	155,847✔
57
58	inline uint32_t burtle(const unsigned char* k, uint32_t length, uint32_t initval)
59	{	600✔
60	uint32_t a, b, c, len;	600✔
61
62	/* Set up the internal state */
63	len = length;	600✔
64	a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */	600✔
65	c = initval; /* the previous hash value */	600✔
66
67	/---------------------------------------- handle most of the key /
68	while (len >= 12) {	600!
69	a += (k[0] + ((uint32_t)k[1] << 8) + ((uint32_t)k[2] << 16) + ((uint32_t)k[3] << 24));	×
70	b += (k[4] + ((uint32_t)k[5] << 8) + ((uint32_t)k[6] << 16) + ((uint32_t)k[7] << 24));	×
71	c += (k[8] + ((uint32_t)k[9] << 8) + ((uint32_t)k[10] << 16) + ((uint32_t)k[11] << 24));	×
72	burtlemix(a, b, c);	×
73	k += 12;	×
74	len -= 12;	×
75	}	×
76
77	/------------------------------------- handle the last 11 bytes /
78	c += length;	600✔
79	switch (len) { /* all the case statements fall through */	600!
80	case 11:	×
81	c += ((uint32_t)k[10] << 24);	×
82	/* fall-through */
83	case 10:	300✔
84	c += ((uint32_t)k[9] << 16);	300✔
85	/* fall-through */
86	case 9:	300!
87	c += ((uint32_t)k[8] << 8);	300✔
88	/* the first byte of c is reserved for the length */
89	/* fall-through */
90	case 8:	300!
91	b += ((uint32_t)k[7] << 24);	300✔
92	/* fall-through */
93	case 7:	300!
94	b += ((uint32_t)k[6] << 16);	300✔
95	/* fall-through */
96	case 6:	300!
97	b += ((uint32_t)k[5] << 8);	300✔
98	/* fall-through */
99	case 5:	300!
100	b += k[4];	300✔
101	/* fall-through */
102	case 4:	600✔
103	a += ((uint32_t)k[3] << 24);	600✔
104	/* fall-through */
105	case 3:	600!
106	a += ((uint32_t)k[2] << 16);	600✔
107	/* fall-through */
108	case 2:	600!
109	a += ((uint32_t)k[1] << 8);	600✔
110	/* fall-through */
111	case 1:	600!
112	a += k[0];	600✔
113	/* case 0: nothing left to add */
114	}	600✔
115	burtlemix(a, b, c);	600✔
116	/-------------------------------------------- report the result /
117	return c;	600✔
118	}	600✔
119
120	inline uint32_t burtleCI(const unsigned char* k, uint32_t length, uint32_t initval)
121	{	83,591✔
122	uint32_t a, b, c, len;	83,591✔
123
124	/* Set up the internal state */
125	len = length;	83,591✔
126	a = b = 0x9e3779b9; /* the golden ratio; an arbitrary value */	83,591✔
127	c = initval; /* the previous hash value */	83,591✔
128
129	/---------------------------------------- handle most of the key /
130	while (len >= 12) {	155,247✔
131	a += (dns_tolower(k[0]) + ((uint32_t)dns_tolower(k[1]) << 8) + ((uint32_t)dns_tolower(k[2]) << 16) + ((uint32_t)dns_tolower(k[3]) << 24));	71,656✔
132	b += (dns_tolower(k[4]) + ((uint32_t)dns_tolower(k[5]) << 8) + ((uint32_t)dns_tolower(k[6]) << 16) + ((uint32_t)dns_tolower(k[7]) << 24));	71,656✔
133	c += (dns_tolower(k[8]) + ((uint32_t)dns_tolower(k[9]) << 8) + ((uint32_t)dns_tolower(k[10]) << 16) + ((uint32_t)dns_tolower(k[11]) << 24));	71,656✔
134	burtlemix(a, b, c);	71,656✔
135	k += 12;	71,656✔
136	len -= 12;	71,656✔
137	}	71,656✔
138
139	/------------------------------------- handle the last 11 bytes /
140	c += length;	83,591✔
141	switch (len) { /* all the case statements fall through */	83,591✔
142	case 11:	5,034✔
143	c += ((uint32_t)dns_tolower(k[10]) << 24);	5,034✔
144	/* fall-through */
145	case 10:	10,865✔
146	c += ((uint32_t)dns_tolower(k[9]) << 16);	10,865✔
147	/* fall-through */
148	case 9:	13,134✔
149	c += ((uint32_t)dns_tolower(k[8]) << 8);	13,134✔
150	/* the first byte of c is reserved for the length */
151	/* fall-through */
152	case 8:	32,647✔
153	b += ((uint32_t)dns_tolower(k[7]) << 24);	32,647✔
154	/* fall-through */
155	case 7:	34,682✔
156	b += ((uint32_t)dns_tolower(k[6]) << 16);	34,682✔
157	/* fall-through */
158	case 6:	37,255✔
159	b += ((uint32_t)dns_tolower(k[5]) << 8);	37,255✔
160	/* fall-through */
161	case 5:	54,782✔
162	b += dns_tolower(k[4]);	54,782✔
163	/* fall-through */
164	case 4:	61,606✔
165	a += ((uint32_t)dns_tolower(k[3]) << 24);	61,606✔
166	/* fall-through */
167	case 3:	65,496✔
168	a += ((uint32_t)dns_tolower(k[2]) << 16);	65,496✔
169	/* fall-through */
170	case 2:	68,086✔
171	a += ((uint32_t)dns_tolower(k[1]) << 8);	68,086✔
172	/* fall-through */
173	case 1:	78,123✔
174	a += dns_tolower(k[0]);	78,123✔
175	/* case 0: nothing left to add */
176	}	83,591✔
177	burtlemix(a, b, c);	83,591✔
178	/-------------------------------------------- report the result /
179	return c;	83,591✔
180	}	83,591✔
181
182	template <typename T>
183	inline uint32_t burtleCI(const T& k, uint32_t initval)
184	{	83,291✔
185	return burtleCI(reinterpret_cast<const unsigned char*>(k.data()), k.length(), initval); // NOLINT(cppcoreguidelines-pro-type-reinterpret-cast): can't static_cast because of sign difference	83,291✔
186	}	83,291✔

PowerDNS / pdns / 18409242756

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