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sha.c File Reference
#include <string.h>
#include "attributes.h"
#include "avutil.h"
#include "bswap.h"
#include "sha.h"
#include "intreadwrite.h"
#include "mem.h"

Go to the source code of this file.

Data Structures

struct  AVSHA
 hash context More...
 

Macros

#define rol(value, bits)   (((value) << (bits)) | ((value) >> (32 - (bits))))
 
#define blk0(i)   (block[i] = AV_RB32(buffer + 4 * (i)))
 
#define blk(i)   (block[i] = rol(block[(i)-3] ^ block[(i)-8] ^ block[(i)-14] ^ block[(i)-16], 1))
 
#define R0(v, w, x, y, z, i)   z += (((w)&((x)^(y)))^(y)) + blk0(i) + 0x5A827999 + rol(v, 5); w = rol(w, 30);
 
#define R1(v, w, x, y, z, i)   z += (((w)&((x)^(y)))^(y)) + blk (i) + 0x5A827999 + rol(v, 5); w = rol(w, 30);
 
#define R2(v, w, x, y, z, i)   z += ( (w)^(x) ^(y)) + blk (i) + 0x6ED9EBA1 + rol(v, 5); w = rol(w, 30);
 
#define R3(v, w, x, y, z, i)   z += ((((w)|(x))&(y))|((w)&(x))) + blk (i) + 0x8F1BBCDC + rol(v, 5); w = rol(w, 30);
 
#define R4(v, w, x, y, z, i)   z += ( (w)^(x) ^(y)) + blk (i) + 0xCA62C1D6 + rol(v, 5); w = rol(w, 30);
 
#define R1_0
 
#define R1_20
 
#define R1_40
 
#define R1_60
 
#define Ch(x, y, z)   (((x) & ((y) ^ (z))) ^ (z))
 
#define Maj(z, y, x)   ((((x) | (y)) & (z)) | ((x) & (y)))
 
#define Sigma0_256(x)   (rol((x), 30) ^ rol((x), 19) ^ rol((x), 10))
 
#define Sigma1_256(x)   (rol((x), 26) ^ rol((x), 21) ^ rol((x), 7))
 
#define sigma0_256(x)   (rol((x), 25) ^ rol((x), 14) ^ ((x) >> 3))
 
#define sigma1_256(x)   (rol((x), 15) ^ rol((x), 13) ^ ((x) >> 10))
 
#define blk(i)
 
#define ROUND256(a, b, c, d, e, f, g, h)
 
#define ROUND256_0_TO_15(a, b, c, d, e, f, g, h)
 
#define ROUND256_16_TO_63(a, b, c, d, e, f, g, h)
 
#define R256_0
 
#define R256_16
 

Functions

struct AVSHAav_sha_alloc (void)
 Allocate an AVSHA context. More...
 
static void sha1_transform (uint32_t state[5], const uint8_t buffer[64])
 
static void sha256_transform (uint32_t *state, const uint8_t buffer[64])
 
av_cold int av_sha_init (AVSHA *ctx, int bits)
 Initialize SHA-1 or SHA-2 hashing. More...
 
void av_sha_update (AVSHA *ctx, const uint8_t *data, unsigned int len)
 Update hash value. More...
 
void av_sha_final (AVSHA *ctx, uint8_t *digest)
 Finish hashing and output digest value. More...
 

Variables

const int av_sha_size = sizeof(AVSHA)
 
static const uint32_t K256 [64]
 

Macro Definition Documentation

#define rol (   value,
  bits 
)    (((value) << (bits)) | ((value) >> (32 - (bits))))

Definition at line 50 of file sha.c.

Referenced by sha1_transform().

#define blk0 (   i)    (block[i] = AV_RB32(buffer + 4 * (i)))

Definition at line 53 of file sha.c.

Referenced by dct_unquantize_h263_intra_neon(), and sha256_transform().

#define blk (   i)    (block[i] = rol(block[(i)-3] ^ block[(i)-8] ^ block[(i)-14] ^ block[(i)-16], 1))
#define R0 (   v,
  w,
  x,
  y,
  z,
 
)    z += (((w)&((x)^(y)))^(y)) + blk0(i) + 0x5A827999 + rol(v, 5); w = rol(w, 30);

Definition at line 56 of file sha.c.

Referenced by sha1_transform().

#define R1 (   v,
  w,
  x,
  y,
  z,
 
)    z += (((w)&((x)^(y)))^(y)) + blk (i) + 0x5A827999 + rol(v, 5); w = rol(w, 30);

Definition at line 57 of file sha.c.

Referenced by sha1_transform().

#define R2 (   v,
  w,
  x,
  y,
  z,
 
)    z += ( (w)^(x) ^(y)) + blk (i) + 0x6ED9EBA1 + rol(v, 5); w = rol(w, 30);

Definition at line 58 of file sha.c.

#define R3 (   v,
  w,
  x,
  y,
  z,
 
)    z += ((((w)|(x))&(y))|((w)&(x))) + blk (i) + 0x8F1BBCDC + rol(v, 5); w = rol(w, 30);

Definition at line 59 of file sha.c.

#define R4 (   v,
  w,
  x,
  y,
  z,
 
)    z += ( (w)^(x) ^(y)) + blk (i) + 0xCA62C1D6 + rol(v, 5); w = rol(w, 30);

Definition at line 60 of file sha.c.

#define R1_0
Value:
R0(a, b, c, d, e, 0 + i); \
R0(e, a, b, c, d, 1 + i); \
R0(d, e, a, b, c, 2 + i); \
R0(c, d, e, a, b, 3 + i); \
R0(b, c, d, e, a, 4 + i); \
i += 5
const char * b
Definition: vf_curves.c:113
#define R0(v, w, x, y, z, i)
Definition: sha.c:56
static AVCodec * c

Referenced by sha1_transform().

#define R1_20
Value:
R2(a, b, c, d, e, 0 + i); \
R2(e, a, b, c, d, 1 + i); \
R2(d, e, a, b, c, 2 + i); \
R2(c, d, e, a, b, 3 + i); \
R2(b, c, d, e, a, 4 + i); \
i += 5
const char * b
Definition: vf_curves.c:113
#define R2(v, w, x, y, z, i)
Definition: sha.c:58
static AVCodec * c

Referenced by sha1_transform().

#define R1_40
Value:
R3(a, b, c, d, e, 0 + i); \
R3(e, a, b, c, d, 1 + i); \
R3(d, e, a, b, c, 2 + i); \
R3(c, d, e, a, b, 3 + i); \
R3(b, c, d, e, a, 4 + i); \
i += 5
const char * b
Definition: vf_curves.c:113
#define R3(v, w, x, y, z, i)
Definition: sha.c:59
static AVCodec * c

Referenced by sha1_transform().

#define R1_60
Value:
R4(a, b, c, d, e, 0 + i); \
R4(e, a, b, c, d, 1 + i); \
R4(d, e, a, b, c, 2 + i); \
R4(c, d, e, a, b, 3 + i); \
R4(b, c, d, e, a, 4 + i); \
i += 5
const char * b
Definition: vf_curves.c:113
#define R4(v, w, x, y, z, i)
Definition: sha.c:60
static AVCodec * c

Referenced by sha1_transform().

#define Ch (   x,
  y,
 
)    (((x) & ((y) ^ (z))) ^ (z))

Definition at line 176 of file sha.c.

Referenced by sha256_transform().

#define Maj (   z,
  y,
 
)    ((((x) | (y)) & (z)) | ((x) & (y)))

Definition at line 177 of file sha.c.

Referenced by sha256_transform().

#define Sigma0_256 (   x)    (rol((x), 30) ^ rol((x), 19) ^ rol((x), 10))

Definition at line 179 of file sha.c.

Referenced by sha256_transform().

#define Sigma1_256 (   x)    (rol((x), 26) ^ rol((x), 21) ^ rol((x), 7))

Definition at line 180 of file sha.c.

Referenced by sha256_transform().

#define sigma0_256 (   x)    (rol((x), 25) ^ rol((x), 14) ^ ((x) >> 3))

Definition at line 181 of file sha.c.

#define sigma1_256 (   x)    (rol((x), 15) ^ rol((x), 13) ^ ((x) >> 10))

Definition at line 182 of file sha.c.

#define blk (   i)
Value:
(block[i] = block[i - 16] + sigma0_256(block[i - 15]) + \
sigma1_256(block[i - 2]) + block[i - 7])
#define sigma1_256(x)
Definition: sha.c:182
static int16_t block[64]
Definition: dct.c:113
#define sigma0_256(x)
Definition: sha.c:181

Definition at line 185 of file sha.c.

#define ROUND256 (   a,
  b,
  c,
  d,
  e,
  f,
  g,
  h 
)
Value:
T1 += (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[i]; \
(d) += T1; \
(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
i++
const char * g
Definition: vf_curves.c:112
const char * b
Definition: vf_curves.c:113
#define Sigma1_256(x)
Definition: sha.c:180
#define Maj(z, y, x)
Definition: sha.c:177
static const uint32_t K256[64]
Definition: sha.c:156
#define Sigma0_256(x)
Definition: sha.c:179
static AVCodec * c
#define Ch(x, y, z)
Definition: sha.c:176

Definition at line 188 of file sha.c.

#define ROUND256_0_TO_15 (   a,
  b,
  c,
  d,
  e,
  f,
  g,
  h 
)
Value:
T1 = blk0(i); \
ROUND256(a,b,c,d,e,f,g,h)
const char * g
Definition: vf_curves.c:112
const char * b
Definition: vf_curves.c:113
#define ROUND256(a, b, c, d, e, f, g, h)
Definition: sha.c:188
#define blk0(i)
Definition: sha.c:53
static AVCodec * c

Definition at line 194 of file sha.c.

#define ROUND256_16_TO_63 (   a,
  b,
  c,
  d,
  e,
  f,
  g,
  h 
)
Value:
T1 = blk(i); \
ROUND256(a,b,c,d,e,f,g,h)
const char * g
Definition: vf_curves.c:112
const char * b
Definition: vf_curves.c:113
#define blk(i)
Definition: sha.c:185
#define ROUND256(a, b, c, d, e, f, g, h)
Definition: sha.c:188
static AVCodec * c

Definition at line 198 of file sha.c.

#define R256_0
Value:
ROUND256_0_TO_15(a, b, c, d, e, f, g, h); \
ROUND256_0_TO_15(h, a, b, c, d, e, f, g); \
ROUND256_0_TO_15(g, h, a, b, c, d, e, f); \
ROUND256_0_TO_15(f, g, h, a, b, c, d, e); \
ROUND256_0_TO_15(e, f, g, h, a, b, c, d); \
ROUND256_0_TO_15(d, e, f, g, h, a, b, c); \
ROUND256_0_TO_15(c, d, e, f, g, h, a, b); \
ROUND256_0_TO_15(b, c, d, e, f, g, h, a)
const char * g
Definition: vf_curves.c:112
const char * b
Definition: vf_curves.c:113
#define ROUND256_0_TO_15(a, b, c, d, e, f, g, h)
Definition: sha.c:194
static AVCodec * c

Referenced by sha256_transform().

#define R256_16
Value:
ROUND256_16_TO_63(a, b, c, d, e, f, g, h); \
ROUND256_16_TO_63(h, a, b, c, d, e, f, g); \
ROUND256_16_TO_63(g, h, a, b, c, d, e, f); \
ROUND256_16_TO_63(f, g, h, a, b, c, d, e); \
ROUND256_16_TO_63(e, f, g, h, a, b, c, d); \
ROUND256_16_TO_63(d, e, f, g, h, a, b, c); \
ROUND256_16_TO_63(c, d, e, f, g, h, a, b); \
ROUND256_16_TO_63(b, c, d, e, f, g, h, a)
const char * g
Definition: vf_curves.c:112
const char * b
Definition: vf_curves.c:113
#define ROUND256_16_TO_63(a, b, c, d, e, f, g, h)
Definition: sha.c:198
static AVCodec * c

Referenced by sha256_transform().

Function Documentation

static void sha1_transform ( uint32_t  state[5],
const uint8_t  buffer[64] 
)
static

Definition at line 64 of file sha.c.

Referenced by av_sha_init().

static void sha256_transform ( uint32_t *  state,
const uint8_t  buffer[64] 
)
static

Definition at line 202 of file sha.c.

Referenced by av_sha_init().

Variable Documentation

const uint32_t K256[64]
static
Initial value:
= {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
}

Definition at line 156 of file sha.c.

Referenced by sha256_transform().