iPXE
Data Structures | Functions | Variables
md5.c File Reference

MD5 algorithm. More...

#include <stdint.h>
#include <string.h>
#include <byteswap.h>
#include <assert.h>
#include <ipxe/rotate.h>
#include <ipxe/crypto.h>
#include <ipxe/md5.h>

Go to the source code of this file.

Data Structures

struct  md5_variables
 MD5 variables. More...
 
struct  md5_step
 An MD5 step function. More...
 

Functions

 FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
 
struct md5_variables __attribute__ ((packed))
 
static uint32_t md5_f_0_15 (struct md5_variables *v)
 f(b,c,d) for steps 0 to 15 More...
 
static uint32_t md5_f_16_31 (struct md5_variables *v)
 f(b,c,d) for steps 16 to 31 More...
 
static uint32_t md5_f_32_47 (struct md5_variables *v)
 f(b,c,d) for steps 32 to 47 More...
 
static uint32_t md5_f_48_63 (struct md5_variables *v)
 f(b,c,d) for steps 48 to 63 More...
 
static void md5_init (void *ctx)
 Initialise MD5 algorithm. More...
 
static void md5_digest (struct md5_context *context)
 Calculate MD5 digest of accumulated data. More...
 
static void md5_update (void *ctx, const void *data, size_t len)
 Accumulate data with MD5 algorithm. More...
 
static void md5_final (void *ctx, void *out)
 Generate MD5 digest. More...
 

Variables

uint32_t a
 
uint32_t b
 
uint32_t c
 
uint32_t d
 
uint32_t w [16]
 
static const uint32_t k [64]
 MD5 constants. More...
 
static const uint8_t r [4][4]
 MD5 shift amounts. More...
 
struct md5_step __attribute__
 
static struct md5_step md5_steps [4]
 MD5 steps. More...
 
struct digest_algorithm md5_algorithm
 MD5 algorithm. More...
 

Detailed Description

MD5 algorithm.

Definition in file md5.c.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL  )

◆ __attribute__()

struct md5_variables __attribute__ ( (packed)  )

◆ md5_f_0_15()

static uint32_t md5_f_0_15 ( struct md5_variables v)
static

f(b,c,d) for steps 0 to 15

Parameters
vMD5 variables
Return values
ff(b,c,d)

Definition at line 81 of file md5.c.

81  {
82  return ( v->d ^ ( v->b & ( v->c ^ v->d ) ) );
83 }
uint32_t c
Definition: md5.c:47
uint32_t b
Definition: md5.c:46
uint32_t d
Definition: md5.c:48

References md5_variables::b, md5_variables::c, and md5_variables::d.

◆ md5_f_16_31()

static uint32_t md5_f_16_31 ( struct md5_variables v)
static

f(b,c,d) for steps 16 to 31

Parameters
vMD5 variables
Return values
ff(b,c,d)

Definition at line 91 of file md5.c.

91  {
92  return ( v->c ^ ( v->d & ( v->b ^ v->c ) ) );
93 }
uint32_t c
Definition: md5.c:47
uint32_t b
Definition: md5.c:46
uint32_t d
Definition: md5.c:48

References md5_variables::b, md5_variables::c, and md5_variables::d.

◆ md5_f_32_47()

static uint32_t md5_f_32_47 ( struct md5_variables v)
static

f(b,c,d) for steps 32 to 47

Parameters
vMD5 variables
Return values
ff(b,c,d)

Definition at line 101 of file md5.c.

101  {
102  return ( v->b ^ v->c ^ v->d );
103 }
uint32_t c
Definition: md5.c:47
uint32_t b
Definition: md5.c:46
uint32_t d
Definition: md5.c:48

References md5_variables::b, md5_variables::c, and md5_variables::d.

◆ md5_f_48_63()

static uint32_t md5_f_48_63 ( struct md5_variables v)
static

f(b,c,d) for steps 48 to 63

Parameters
vMD5 variables
Return values
ff(b,c,d)

Definition at line 111 of file md5.c.

111  {
112  return ( v->c ^ ( v->b | (~v->d) ) );
113 }
uint32_t c
Definition: md5.c:47
uint32_t b
Definition: md5.c:46
uint32_t d
Definition: md5.c:48

References md5_variables::b, md5_variables::c, and md5_variables::d.

◆ md5_init()

static void md5_init ( void *  ctx)
static

Initialise MD5 algorithm.

Parameters
ctxMD5 context

Definition at line 147 of file md5.c.

147  {
148  struct md5_context *context = ctx;
149 
150  context->ddd.dd.digest.h[0] = cpu_to_le32 ( 0x67452301 );
151  context->ddd.dd.digest.h[1] = cpu_to_le32 ( 0xefcdab89 );
152  context->ddd.dd.digest.h[2] = cpu_to_le32 ( 0x98badcfe );
153  context->ddd.dd.digest.h[3] = cpu_to_le32 ( 0x10325476 );
154  context->len = 0;
155 }
struct golan_eq_context ctx
Definition: CIB_PRM.h:28
struct md5_digest_data dd
Digest and data block.
Definition: md5.h:51
struct md5_digest digest
Digest of data already processed.
Definition: md5.h:43
size_t len
Amount of accumulated data.
Definition: md5.h:60
#define cpu_to_le32(value)
Definition: byteswap.h:107
An MD5 context.
Definition: md5.h:58
uint32_t h[4]
Hash output.
Definition: md5.h:18
union md5_digest_data_dwords ddd
Digest and accumulated data.
Definition: md5.h:62

References cpu_to_le32, ctx, md5_digest_data_dwords::dd, md5_context::ddd, md5_digest_data::digest, md5_digest::h, and md5_context::len.

◆ md5_digest()

static void md5_digest ( struct md5_context context)
static

Calculate MD5 digest of accumulated data.

Parameters
contextMD5 context

Definition at line 162 of file md5.c.

162  {
163  union {
165  struct md5_variables v;
166  } u;
167  uint32_t *a = &u.v.a;
168  uint32_t *b = &u.v.b;
169  uint32_t *c = &u.v.c;
170  uint32_t *d = &u.v.d;
171  uint32_t *w = u.v.w;
172  uint32_t f;
173  uint32_t g;
174  uint32_t temp;
175  struct md5_step *step;
176  unsigned int round;
177  unsigned int i;
178 
179  /* Sanity checks */
180  assert ( ( context->len % sizeof ( context->ddd.dd.data ) ) == 0 );
181  linker_assert ( &u.ddd.dd.digest.h[0] == a, md5_bad_layout );
182  linker_assert ( &u.ddd.dd.digest.h[1] == b, md5_bad_layout );
183  linker_assert ( &u.ddd.dd.digest.h[2] == c, md5_bad_layout );
184  linker_assert ( &u.ddd.dd.digest.h[3] == d, md5_bad_layout );
185  linker_assert ( &u.ddd.dd.data.dword[0] == w, md5_bad_layout );
186 
187  DBGC ( context, "MD5 digesting:\n" );
188  DBGC_HDA ( context, 0, &context->ddd.dd.digest,
189  sizeof ( context->ddd.dd.digest ) );
190  DBGC_HDA ( context, context->len, &context->ddd.dd.data,
191  sizeof ( context->ddd.dd.data ) );
192 
193  /* Convert h[0..3] to host-endian, and initialise a, b, c, d,
194  * and w[0..15]
195  */
196  for ( i = 0 ; i < ( sizeof ( u.ddd.dword ) /
197  sizeof ( u.ddd.dword[0] ) ) ; i++ ) {
198  le32_to_cpus ( &context->ddd.dword[i] );
199  u.ddd.dword[i] = context->ddd.dword[i];
200  }
201 
202  /* Main loop */
203  for ( i = 0 ; i < 64 ; i++ ) {
204  round = ( i / 16 );
205  step = &md5_steps[round];
206  f = step->f ( &u.v );
207  g = ( ( ( step->coefficient * i ) + step->constant ) % 16 );
208  temp = *d;
209  *d = *c;
210  *c = *b;
211  *b = ( *b + rol32 ( ( *a + f + k[i] + w[g] ),
212  r[round][ i % 4 ] ) );
213  *a = temp;
214  DBGC2 ( context, "%2d : %08x %08x %08x %08x\n",
215  i, *a, *b, *c, *d );
216  }
217 
218  /* Add chunk to hash and convert back to little-endian */
219  for ( i = 0 ; i < 4 ; i++ ) {
220  context->ddd.dd.digest.h[i] =
221  cpu_to_le32 ( context->ddd.dd.digest.h[i] +
222  u.ddd.dd.digest.h[i] );
223  }
224 
225  DBGC ( context, "MD5 digested:\n" );
226  DBGC_HDA ( context, 0, &context->ddd.dd.digest,
227  sizeof ( context->ddd.dd.digest ) );
228 }
uint32_t w[16]
Definition: md5.c:32
static const uint8_t r[4][4]
MD5 shift amounts.
Definition: md5.c:68
static u32 rol32(u32 v, int bits)
Rotate 32-bit value left.
Definition: wpa_tkip.c:173
An MD5 step function.
Definition: md5.c:116
uint32_t b
Definition: md5.c:29
uint32_t d
Definition: md5.c:31
uint32_t g
Definition: sha256.c:34
#define DBGC(...)
Definition: compiler.h:505
MD5 variables.
Definition: md5.c:41
uint32_t c
Definition: md5.c:30
MD5 digest and data block.
Definition: md5.h:49
assert((readw(&hdr->flags) &(GTF_reading|GTF_writing))==0)
struct md5_digest_data dd
Digest and data block.
Definition: md5.h:51
#define DBGC_HDA(...)
Definition: compiler.h:506
struct md5_digest digest
Digest of data already processed.
Definition: md5.h:43
size_t len
Amount of accumulated data.
Definition: md5.h:60
#define cpu_to_le32(value)
Definition: byteswap.h:107
uint32_t dword[sizeof(struct md5_digest_data)/sizeof(uint32_t)]
Raw dwords.
Definition: md5.h:54
static const uint32_t k[64]
MD5 constants.
Definition: md5.c:53
unsigned int uint32_t
Definition: stdint.h:12
#define DBGC2(...)
Definition: compiler.h:522
void step(void)
Single-step a single process.
Definition: process.c:98
uint32_t h[4]
Hash output.
Definition: md5.h:18
static struct md5_step md5_steps[4]
MD5 steps.
Definition: md5.c:131
uint32_t f
Definition: sha256.c:33
union md5_digest_data_dwords ddd
Digest and accumulated data.
Definition: md5.h:62
union md5_block data
Accumulated data.
Definition: md5.h:45
union @16 u
#define linker_assert(condition, error_symbol)
Assert a condition at link-time.
Definition: assert.h:68
uint32_t a
Definition: md5.c:28
#define le32_to_cpus(ptr)
Definition: byteswap.h:125

References a, assert(), b, c, cpu_to_le32, d, md5_digest_data::data, DBGC, DBGC2, DBGC_HDA, md5_digest_data_dwords::dd, md5_context::ddd, md5_digest_data::digest, md5_digest_data_dwords::dword, f, g, md5_digest::h, k, le32_to_cpus, md5_context::len, linker_assert, md5_steps, r, rol32(), step(), u, and w.

Referenced by md5_update().

◆ md5_update()

static void md5_update ( void *  ctx,
const void *  data,
size_t  len 
)
static

Accumulate data with MD5 algorithm.

Parameters
ctxMD5 context
dataData
lenLength of data

Definition at line 237 of file md5.c.

237  {
238  struct md5_context *context = ctx;
239  const uint8_t *byte = data;
240  size_t offset;
241 
242  /* Accumulate data a byte at a time, performing the digest
243  * whenever we fill the data buffer
244  */
245  while ( len-- ) {
246  offset = ( context->len % sizeof ( context->ddd.dd.data ) );
247  context->ddd.dd.data.byte[offset] = *(byte++);
248  context->len++;
249  if ( ( context->len % sizeof ( context->ddd.dd.data ) ) == 0 )
250  md5_digest ( context );
251  }
252 }
struct golan_eq_context ctx
Definition: CIB_PRM.h:28
struct md5_digest_data dd
Digest and data block.
Definition: md5.h:51
static userptr_t size_t offset
Offset of the first segment within the content.
Definition: deflate.h:259
size_t len
Amount of accumulated data.
Definition: md5.h:60
static void md5_digest(struct md5_context *context)
Calculate MD5 digest of accumulated data.
Definition: md5.c:162
An MD5 context.
Definition: md5.h:58
unsigned char uint8_t
Definition: stdint.h:10
uint8_t byte[64]
Raw bytes.
Definition: md5.h:24
uint32_t len
Length.
Definition: ena.h:14
union md5_digest_data_dwords ddd
Digest and accumulated data.
Definition: md5.h:62
union md5_block data
Accumulated data.
Definition: md5.h:45
struct arbelprm_port_state_change_st data
Message.
Definition: arbel.h:12

References md5_block::byte, ctx, data, md5_digest_data::data, md5_digest_data_dwords::dd, md5_context::ddd, len, md5_context::len, md5_digest(), and offset.

Referenced by md5_final().

◆ md5_final()

static void md5_final ( void *  ctx,
void *  out 
)
static

Generate MD5 digest.

Parameters
ctxMD5 context
outOutput buffer

Definition at line 260 of file md5.c.

260  {
261  struct md5_context *context = ctx;
262  uint64_t len_bits;
263  uint8_t pad;
264 
265  /* Record length before pre-processing */
266  len_bits = cpu_to_le64 ( ( ( uint64_t ) context->len ) * 8 );
267 
268  /* Pad with a single "1" bit followed by as many "0" bits as required */
269  pad = 0x80;
270  do {
271  md5_update ( ctx, &pad, sizeof ( pad ) );
272  pad = 0x00;
273  } while ( ( context->len % sizeof ( context->ddd.dd.data ) ) !=
274  offsetof ( typeof ( context->ddd.dd.data ), final.len ) );
275 
276  /* Append length (in bits) */
277  md5_update ( ctx, &len_bits, sizeof ( len_bits ) );
278  assert ( ( context->len % sizeof ( context->ddd.dd.data ) ) == 0 );
279 
280  /* Copy out final digest */
281  memcpy ( out, &context->ddd.dd.digest,
282  sizeof ( context->ddd.dd.digest ) );
283 }
unsigned long long uint64_t
Definition: stdint.h:13
#define cpu_to_le64(value)
Definition: byteswap.h:108
#define offsetof(type, field)
Get offset of a field within a structure.
Definition: stddef.h:24
u32 pad[9]
Padding.
Definition: ar9003_mac.h:90
struct golan_eq_context ctx
Definition: CIB_PRM.h:28
void * memcpy(void *dest, const void *src, size_t len) __nonnull
assert((readw(&hdr->flags) &(GTF_reading|GTF_writing))==0)
struct md5_digest_data dd
Digest and data block.
Definition: md5.h:51
static void md5_update(void *ctx, const void *data, size_t len)
Accumulate data with MD5 algorithm.
Definition: md5.c:237
__be32 out[4]
Definition: CIB_PRM.h:36
struct md5_digest digest
Digest of data already processed.
Definition: md5.h:43
size_t len
Amount of accumulated data.
Definition: md5.h:60
An MD5 context.
Definition: md5.h:58
unsigned char uint8_t
Definition: stdint.h:10
union md5_digest_data_dwords ddd
Digest and accumulated data.
Definition: md5.h:62
union md5_block data
Accumulated data.
Definition: md5.h:45

References assert(), cpu_to_le64, ctx, md5_digest_data::data, md5_digest_data_dwords::dd, md5_context::ddd, md5_digest_data::digest, md5_context::len, md5_update(), memcpy(), offsetof, out, and pad.

Variable Documentation

◆ a

Definition at line 28 of file md5.c.

Referenced by md5_digest().

◆ b

Definition at line 29 of file md5.c.

Referenced by md5_digest().

◆ c

Definition at line 30 of file md5.c.

Referenced by md5_digest().

◆ d

Definition at line 31 of file md5.c.

Referenced by md5_digest().

◆ w

uint32_t w[16]

Definition at line 32 of file md5.c.

Referenced by md5_digest().

◆ k

const uint32_t k[64]
static
Initial value:
= {
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a,
0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821, 0xf61e2562, 0xc040b340,
0x265e5a51, 0xe9b6c7aa, 0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed, 0xa9e3e905, 0xfcefa3f8,
0x676f02d9, 0x8d2a4c8a, 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70, 0x289b7ec6, 0xeaa127fa,
0xd4ef3085, 0x04881d05, 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039, 0x655b59c3, 0x8f0ccc92,
0xffeff47d, 0x85845dd1, 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
}

MD5 constants.

Definition at line 53 of file md5.c.

Referenced by ath9k_adjust_pdadc_values(), ath9k_change_gain_boundary_setting(), ath9k_hw_fill_vpd_table(), ath9k_hw_get_gain_boundaries_pdadcs(), md5_digest(), sha1_digest(), and vxgetlink().

◆ r

const uint8_t r[4][4]
static
Initial value:
= {
{ 7, 12, 17, 22 },
{ 5, 9, 14, 20 },
{ 4, 11, 16, 23 },
{ 6, 10, 15, 21 },
}

MD5 shift amounts.

Definition at line 68 of file md5.c.

Referenced by md5_digest().

◆ __attribute__

◆ md5_steps

struct md5_step md5_steps[4]
static
Initial value:
= {
{ .f = md5_f_0_15, .coefficient = 1, .constant = 0 },
{ .f = md5_f_16_31, .coefficient = 5, .constant = 1 },
{ .f = md5_f_32_47, .coefficient = 3, .constant = 5 },
{ .f = md5_f_48_63, .coefficient = 7, .constant = 0 },
}
static uint32_t md5_f_16_31(struct md5_variables *v)
f(b,c,d) for steps 16 to 31
Definition: md5.c:91
static uint32_t md5_f_0_15(struct md5_variables *v)
f(b,c,d) for steps 0 to 15
Definition: md5.c:81
static uint32_t md5_f_32_47(struct md5_variables *v)
f(b,c,d) for steps 32 to 47
Definition: md5.c:101
static uint32_t md5_f_48_63(struct md5_variables *v)
f(b,c,d) for steps 48 to 63
Definition: md5.c:111

MD5 steps.

Definition at line 131 of file md5.c.

Referenced by md5_digest().

◆ md5_algorithm

struct digest_algorithm md5_algorithm
Initial value:
= {
.name = "md5",
.ctxsize = sizeof ( struct md5_context ),
.blocksize = sizeof ( union md5_block ),
.digestsize = sizeof ( struct md5_digest ),
.init = md5_init,
.update = md5_update,
.final = md5_final,
}
static void md5_init(void *ctx)
Initialise MD5 algorithm.
Definition: md5.c:147
An MD5 data block.
Definition: md5.h:22
static void md5_final(void *ctx, void *out)
Generate MD5 digest.
Definition: md5.c:260
static void md5_update(void *ctx, const void *data, size_t len)
Accumulate data with MD5 algorithm.
Definition: md5.c:237
An MD5 digest.
Definition: md5.h:16
An MD5 context.
Definition: md5.h:58
uint32_t digestsize
Digest size (i.e.
Definition: pccrr.h:14

MD5 algorithm.

Definition at line 286 of file md5.c.

Referenced by dbg_md5_da(), http_digest_final(), http_digest_init(), http_digest_update(), iscsi_handle_chap_i_value(), iscsi_handle_chap_r_value(), md5_sha1_final(), md5_sha1_init(), md5_sha1_update(), md5_test_exec(), md5sum_exec(), ntlm_key(), ntlm_response(), tkip_kie_mic(), and tls_prf().