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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*-------------------------------------------------------------------------
*
* checksum_helper.c
* Compute a checksum of any of various types using common routines
*
* Portions Copyright (c) 2016-2023, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/common/checksum_helper.c
*
*-------------------------------------------------------------------------
*/
#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#endif
#include "common/checksum_helper.h"
/*
* If 'name' is a recognized checksum type, set *type to the corresponding
* constant and return true. Otherwise, set *type to CHECKSUM_TYPE_NONE and
* return false.
*/
bool
pg_checksum_parse_type(char *name, pg_checksum_type *type)
{
pg_checksum_type result_type = CHECKSUM_TYPE_NONE;
bool result = true;
if (pg_strcasecmp(name, "none") == 0)
result_type = CHECKSUM_TYPE_NONE;
else if (pg_strcasecmp(name, "crc32c") == 0)
result_type = CHECKSUM_TYPE_CRC32C;
else if (pg_strcasecmp(name, "sha224") == 0)
result_type = CHECKSUM_TYPE_SHA224;
else if (pg_strcasecmp(name, "sha256") == 0)
result_type = CHECKSUM_TYPE_SHA256;
else if (pg_strcasecmp(name, "sha384") == 0)
result_type = CHECKSUM_TYPE_SHA384;
else if (pg_strcasecmp(name, "sha512") == 0)
result_type = CHECKSUM_TYPE_SHA512;
else
result = false;
*type = result_type;
return result;
}
/*
* Get the canonical human-readable name corresponding to a checksum type.
*/
char *
pg_checksum_type_name(pg_checksum_type type)
{
switch (type)
{
case CHECKSUM_TYPE_NONE:
return "NONE";
case CHECKSUM_TYPE_CRC32C:
return "CRC32C";
case CHECKSUM_TYPE_SHA224:
return "SHA224";
case CHECKSUM_TYPE_SHA256:
return "SHA256";
case CHECKSUM_TYPE_SHA384:
return "SHA384";
case CHECKSUM_TYPE_SHA512:
return "SHA512";
}
Assert(false);
return "???";
}
/*
* Initialize a checksum context for checksums of the given type.
* Returns 0 for a success, -1 for a failure.
*/
int
pg_checksum_init(pg_checksum_context *context, pg_checksum_type type)
{
context->type = type;
switch (type)
{
case CHECKSUM_TYPE_NONE:
/* do nothing */
break;
case CHECKSUM_TYPE_CRC32C:
INIT_CRC32C(context->raw_context.c_crc32c);
break;
case CHECKSUM_TYPE_SHA224:
context->raw_context.c_sha2 = pg_cryptohash_create(PG_SHA224);
if (context->raw_context.c_sha2 == NULL)
return -1;
if (pg_cryptohash_init(context->raw_context.c_sha2) < 0)
{
pg_cryptohash_free(context->raw_context.c_sha2);
return -1;
}
break;
case CHECKSUM_TYPE_SHA256:
context->raw_context.c_sha2 = pg_cryptohash_create(PG_SHA256);
if (context->raw_context.c_sha2 == NULL)
return -1;
if (pg_cryptohash_init(context->raw_context.c_sha2) < 0)
{
pg_cryptohash_free(context->raw_context.c_sha2);
return -1;
}
break;
case CHECKSUM_TYPE_SHA384:
context->raw_context.c_sha2 = pg_cryptohash_create(PG_SHA384);
if (context->raw_context.c_sha2 == NULL)
return -1;
if (pg_cryptohash_init(context->raw_context.c_sha2) < 0)
{
pg_cryptohash_free(context->raw_context.c_sha2);
return -1;
}
break;
case CHECKSUM_TYPE_SHA512:
context->raw_context.c_sha2 = pg_cryptohash_create(PG_SHA512);
if (context->raw_context.c_sha2 == NULL)
return -1;
if (pg_cryptohash_init(context->raw_context.c_sha2) < 0)
{
pg_cryptohash_free(context->raw_context.c_sha2);
return -1;
}
break;
}
return 0;
}
/*
* Update a checksum context with new data.
* Returns 0 for a success, -1 for a failure.
*/
int
pg_checksum_update(pg_checksum_context *context, const uint8 *input,
size_t len)
{
switch (context->type)
{
case CHECKSUM_TYPE_NONE:
/* do nothing */
break;
case CHECKSUM_TYPE_CRC32C:
COMP_CRC32C(context->raw_context.c_crc32c, input, len);
break;
case CHECKSUM_TYPE_SHA224:
case CHECKSUM_TYPE_SHA256:
case CHECKSUM_TYPE_SHA384:
case CHECKSUM_TYPE_SHA512:
if (pg_cryptohash_update(context->raw_context.c_sha2, input, len) < 0)
return -1;
break;
}
return 0;
}
/*
* Finalize a checksum computation and write the result to an output buffer.
*
* The caller must ensure that the buffer is at least PG_CHECKSUM_MAX_LENGTH
* bytes in length. The return value is the number of bytes actually written,
* or -1 for a failure.
*/
int
pg_checksum_final(pg_checksum_context *context, uint8 *output)
{
int retval = 0;
StaticAssertDecl(sizeof(pg_crc32c) <= PG_CHECKSUM_MAX_LENGTH,
"CRC-32C digest too big for PG_CHECKSUM_MAX_LENGTH");
StaticAssertDecl(PG_SHA224_DIGEST_LENGTH <= PG_CHECKSUM_MAX_LENGTH,
"SHA224 digest too big for PG_CHECKSUM_MAX_LENGTH");
StaticAssertDecl(PG_SHA256_DIGEST_LENGTH <= PG_CHECKSUM_MAX_LENGTH,
"SHA256 digest too big for PG_CHECKSUM_MAX_LENGTH");
StaticAssertDecl(PG_SHA384_DIGEST_LENGTH <= PG_CHECKSUM_MAX_LENGTH,
"SHA384 digest too big for PG_CHECKSUM_MAX_LENGTH");
StaticAssertDecl(PG_SHA512_DIGEST_LENGTH <= PG_CHECKSUM_MAX_LENGTH,
"SHA512 digest too big for PG_CHECKSUM_MAX_LENGTH");
switch (context->type)
{
case CHECKSUM_TYPE_NONE:
break;
case CHECKSUM_TYPE_CRC32C:
FIN_CRC32C(context->raw_context.c_crc32c);
retval = sizeof(pg_crc32c);
memcpy(output, &context->raw_context.c_crc32c, retval);
break;
case CHECKSUM_TYPE_SHA224:
retval = PG_SHA224_DIGEST_LENGTH;
if (pg_cryptohash_final(context->raw_context.c_sha2,
output, retval) < 0)
return -1;
pg_cryptohash_free(context->raw_context.c_sha2);
break;
case CHECKSUM_TYPE_SHA256:
retval = PG_SHA256_DIGEST_LENGTH;
if (pg_cryptohash_final(context->raw_context.c_sha2,
output, retval) < 0)
return -1;
pg_cryptohash_free(context->raw_context.c_sha2);
break;
case CHECKSUM_TYPE_SHA384:
retval = PG_SHA384_DIGEST_LENGTH;
if (pg_cryptohash_final(context->raw_context.c_sha2,
output, retval) < 0)
return -1;
pg_cryptohash_free(context->raw_context.c_sha2);
break;
case CHECKSUM_TYPE_SHA512:
retval = PG_SHA512_DIGEST_LENGTH;
if (pg_cryptohash_final(context->raw_context.c_sha2,
output, retval) < 0)
return -1;
pg_cryptohash_free(context->raw_context.c_sha2);
break;
}
Assert(retval <= PG_CHECKSUM_MAX_LENGTH);
return retval;
}
|
