PostgreSQL Source Code git master
Macros | Functions
px-hmac.c File Reference
#include "postgres.h"
#include "px.h"
Include dependency graph for px-hmac.c:

Go to the source code of this file.

Macros

#define  HMAC_IPAD   0x36
 
#define  HMAC_OPAD   0x5C
 

Functions

static unsigned  hmac_result_size (PX_HMAC *h)
 
static unsigned  hmac_block_size (PX_HMAC *h)
 
static void  hmac_init (PX_HMAC *h, const uint8 *key, unsigned klen)
 
static void  hmac_reset (PX_HMAC *h)
 
static void  hmac_update (PX_HMAC *h, const uint8 *data, unsigned dlen)
 
static void  hmac_finish (PX_HMAC *h, uint8 *dst)
 
static void  hmac_free (PX_HMAC *h)
 
int  px_find_hmac (const char *name, PX_HMAC **res)
 

Macro Definition Documentation

◆ HMAC_IPAD

#define HMAC_IPAD   0x36

Definition at line 36 of file px-hmac.c.

◆ HMAC_OPAD

#define HMAC_OPAD   0x5C

Definition at line 37 of file px-hmac.c.

Function Documentation

◆ hmac_block_size()

static unsigned hmac_block_size ( PX_HMAC *  h )
static

Definition at line 46 of file px-hmac.c.

47{
48 return px_md_block_size(h->md);
49}
#define px_md_block_size(md)
Definition: px.h:203
PX_MD * md
Definition: px.h:139

References px_hmac::md, and px_md_block_size.

Referenced by px_find_hmac().

◆ hmac_finish()

static void hmac_finish ( PX_HMAC *  h,
uint8 *  dst 
)
static

Definition at line 100 of file px-hmac.c.

101{
102 PX_MD *md = h->md;
103 unsigned bs,
104 hlen;
105 uint8 *buf;
106
107 bs = px_md_block_size(md);
108 hlen = px_md_result_size(md);
109
110 buf = palloc(hlen);
111
112 px_md_finish(md, buf);
113
114 px_md_reset(md);
115 px_md_update(md, h->p.opad, bs);
116 px_md_update(md, buf, hlen);
117 px_md_finish(md, dst);
118
119 px_memset(buf, 0, hlen);
120 pfree(buf);
121}
uint8_t uint8
Definition: c.h:536
void pfree(void *pointer)
Definition: mcxt.c:1594
void * palloc(Size size)
Definition: mcxt.c:1365
static char * buf
Definition: pg_test_fsync.c:72
void px_memset(void *ptr, int c, size_t len)
Definition: px.c:123
#define px_md_finish(md, buf)
Definition: px.h:206
#define px_md_reset(md)
Definition: px.h:204
#define px_md_update(md, data, dlen)
Definition: px.h:205
#define px_md_result_size(md)
Definition: px.h:202
Definition: px.h:108
struct px_hmac::@9 p
uint8 * opad
Definition: px.h:144

References buf, px_hmac::md, px_hmac::opad, px_hmac::p, palloc(), pfree(), px_md_block_size, px_md_finish, px_md_reset, px_md_result_size, px_md_update, and px_memset().

Referenced by px_find_hmac().

◆ hmac_free()

static void hmac_free ( PX_HMAC *  h )
static

Definition at line 124 of file px-hmac.c.

125{
126 unsigned bs;
127
128 bs = px_md_block_size(h->md);
129 px_md_free(h->md);
130
131 px_memset(h->p.ipad, 0, bs);
132 px_memset(h->p.opad, 0, bs);
133 pfree(h->p.ipad);
134 pfree(h->p.opad);
135 pfree(h);
136}
#define px_md_free(md)
Definition: px.h:207
uint8 * ipad
Definition: px.h:143

References px_hmac::ipad, px_hmac::md, px_hmac::opad, px_hmac::p, pfree(), px_md_block_size, px_md_free, and px_memset().

Referenced by px_find_hmac().

◆ hmac_init()

static void hmac_init ( PX_HMAC *  h,
const uint8 *  key,
unsigned  klen 
)
static

Definition at line 52 of file px-hmac.c.

53{
54 unsigned bs,
55 i;
56 uint8 *keybuf;
57 PX_MD *md = h->md;
58
59 bs = px_md_block_size(md);
60 keybuf = palloc0(bs);
61
62 if (klen > bs)
63 {
64 px_md_update(md, key, klen);
65 px_md_finish(md, keybuf);
66 px_md_reset(md);
67 }
68 else
69 memcpy(keybuf, key, klen);
70
71 for (i = 0; i < bs; i++)
72 {
73 h->p.ipad[i] = keybuf[i] ^ HMAC_IPAD;
74 h->p.opad[i] = keybuf[i] ^ HMAC_OPAD;
75 }
76
77 px_memset(keybuf, 0, bs);
78 pfree(keybuf);
79
80 px_md_update(md, h->p.ipad, bs);
81}
i
int i
Definition: isn.c:77
void * palloc0(Size size)
Definition: mcxt.c:1395
#define HMAC_OPAD
Definition: px-hmac.c:37
#define HMAC_IPAD
Definition: px-hmac.c:36

References HMAC_IPAD, HMAC_OPAD, i, px_hmac::ipad, sort-test::key, px_hmac::md, px_hmac::opad, px_hmac::p, palloc0(), pfree(), px_md_block_size, px_md_finish, px_md_reset, px_md_update, and px_memset().

Referenced by px_find_hmac().

◆ hmac_reset()

static void hmac_reset ( PX_HMAC *  h )
static

Definition at line 84 of file px-hmac.c.

85{
86 PX_MD *md = h->md;
87 unsigned bs = px_md_block_size(md);
88
89 px_md_reset(md);
90 px_md_update(md, h->p.ipad, bs);
91}

References px_hmac::ipad, px_hmac::md, px_hmac::p, px_md_block_size, px_md_reset, and px_md_update.

Referenced by px_find_hmac().

◆ hmac_result_size()

static unsigned hmac_result_size ( PX_HMAC *  h )
static

Definition at line 40 of file px-hmac.c.

41{
42 return px_md_result_size(h->md);
43}

References px_hmac::md, and px_md_result_size.

Referenced by px_find_hmac().

◆ hmac_update()

static void hmac_update ( PX_HMAC *  h,
const uint8 *  data,
unsigned  dlen 
)
static

Definition at line 94 of file px-hmac.c.

95{
96 px_md_update(h->md, data, dlen);
97}
const void * data

References data, px_hmac::md, and px_md_update.

Referenced by px_find_hmac().

◆ px_find_hmac()

int px_find_hmac ( const char *  name,
PX_HMAC **  res 
)

Definition at line 142 of file px-hmac.c.

143{
144 int err;
145 PX_MD *md;
146 PX_HMAC *h;
147 unsigned bs;
148
149 err = px_find_digest(name, &md);
150 if (err)
151 return err;
152
153 bs = px_md_block_size(md);
154 if (bs < 2)
155 {
156 px_md_free(md);
158 }
159
160 h = palloc(sizeof(*h));
161 h->p.ipad = palloc(bs);
162 h->p.opad = palloc(bs);
163 h->md = md;
164
167 h->reset = hmac_reset;
168 h->update = hmac_update;
169 h->finish = hmac_finish;
170 h->free = hmac_free;
171 h->init = hmac_init;
172
173 *res = h;
174
175 return 0;
176}
void err(int eval, const char *fmt,...)
Definition: err.c:43
int px_find_digest(const char *name, PX_MD **res)
Definition: openssl.c:161
static unsigned hmac_result_size(PX_HMAC *h)
Definition: px-hmac.c:40
static void hmac_init(PX_HMAC *h, const uint8 *key, unsigned klen)
Definition: px-hmac.c:52
static void hmac_finish(PX_HMAC *h, uint8 *dst)
Definition: px-hmac.c:100
static void hmac_update(PX_HMAC *h, const uint8 *data, unsigned dlen)
Definition: px-hmac.c:94
static void hmac_free(PX_HMAC *h)
Definition: px-hmac.c:124
static unsigned hmac_block_size(PX_HMAC *h)
Definition: px-hmac.c:46
static void hmac_reset(PX_HMAC *h)
Definition: px-hmac.c:84
#define PXE_HASH_UNUSABLE_FOR_HMAC
Definition: px.h:55
Definition: px.h:130
unsigned(* block_size)(PX_HMAC *h)
Definition: px.h:132
void(* finish)(PX_HMAC *h, uint8 *dst)
Definition: px.h:135
void(* init)(PX_HMAC *h, const uint8 *key, unsigned klen)
Definition: px.h:137
unsigned(* result_size)(PX_HMAC *h)
Definition: px.h:131
void(* update)(PX_HMAC *h, const uint8 *data, unsigned dlen)
Definition: px.h:134
void(* free)(PX_HMAC *h)
Definition: px.h:136
void(* reset)(PX_HMAC *h)
Definition: px.h:133
const char * name

References px_hmac::block_size, err(), px_hmac::finish, px_hmac::free, hmac_block_size(), hmac_finish(), hmac_free(), hmac_init(), hmac_reset(), hmac_result_size(), hmac_update(), px_hmac::init, px_hmac::ipad, px_hmac::md, name, px_hmac::opad, px_hmac::p, palloc(), px_find_digest(), px_md_block_size, px_md_free, PXE_HASH_UNUSABLE_FOR_HMAC, px_hmac::reset, px_hmac::result_size, and px_hmac::update.

Referenced by pg_hmac().

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