FFmpeg
Data Structures | Macros | Functions | Variables
twofish.c File Reference
#include "twofish.h"
#include "common.h"
#include "intreadwrite.h"
#include "attributes.h"

Go to the source code of this file.

Data Structures

struct  AVTWOFISH
 

Macros

#define LR(x, n)   ((x) << (n) | (x) >> (32 - (n)))
 
#define RR(x, n)   ((x) >> (n) | (x) << (32 - (n)))
 

Functions

struct AVTWOFISHav_twofish_alloc (void)
 Allocate an AVTWOFISH context To free the struct: av_free(ptr) More...
 
static uint8_t gfmul (uint8_t a, uint8_t b)
 
static uint32_t tf_RS (uint32_t k0, uint32_t k1)
 
static void tf_h0 (uint8_t y[4], uint32_t L[4], int k)
 
static uint32_t tf_h (uint32_t X, uint32_t L[4], int k)
 
static uint32_t MDS_mul (AVTWOFISH *cs, uint32_t X)
 
static void precomputeMDS (AVTWOFISH *cs)
 
static void twofish_encrypt (AVTWOFISH *cs, uint8_t *dst, const uint8_t *src)
 
static void twofish_decrypt (AVTWOFISH *cs, uint8_t *dst, const uint8_t *src, uint8_t *iv)
 
av_cold int av_twofish_init (AVTWOFISH *cs, const uint8_t *key, int key_bits)
 Initialize an AVTWOFISH context. More...
 
void av_twofish_crypt (AVTWOFISH *cs, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
 Encrypt or decrypt a buffer using a previously initialized context. More...
 

Variables

static const uint8_t MD1 [256]
 
static const uint8_t MD2 [256]
 
static const uint8_t q0 [256]
 
static const uint8_t q1 [256]
 
const int av_twofish_size = sizeof(AVTWOFISH)
 

Macro Definition Documentation

#define LR (   x,
  n 
)    ((x) << (n) | (x) >> (32 - (n)))

Definition at line 26 of file twofish.c.

Referenced by av_twofish_init(), twofish_decrypt(), and twofish_encrypt().

#define RR (   x,
  n 
)    ((x) >> (n) | (x) << (32 - (n)))

Definition at line 27 of file twofish.c.

Referenced by twofish_decrypt(), and twofish_encrypt().

Function Documentation

static uint8_t gfmul ( uint8_t  a,
uint8_t  b 
)
static

Definition at line 122 of file twofish.c.

Referenced by tf_RS().

static uint32_t tf_RS ( uint32_t  k0,
uint32_t  k1 
)
static

Definition at line 137 of file twofish.c.

Referenced by av_twofish_init().

static void tf_h0 ( uint8_t  y[4],
uint32_t  L[4],
int  k 
)
static

Definition at line 149 of file twofish.c.

Referenced by precomputeMDS(), and tf_h().

static uint32_t tf_h ( uint32_t  X,
uint32_t  L[4],
int  k 
)
static

Definition at line 173 of file twofish.c.

Referenced by av_twofish_init().

static uint32_t MDS_mul ( AVTWOFISH cs,
uint32_t  X 
)
static

Definition at line 187 of file twofish.c.

Referenced by twofish_decrypt(), and twofish_encrypt().

static void precomputeMDS ( AVTWOFISH cs)
static

Definition at line 192 of file twofish.c.

Referenced by av_twofish_init().

static void twofish_encrypt ( AVTWOFISH cs,
uint8_t dst,
const uint8_t src 
)
static

Definition at line 206 of file twofish.c.

Referenced by av_twofish_crypt().

static void twofish_decrypt ( AVTWOFISH cs,
uint8_t dst,
const uint8_t src,
uint8_t iv 
)
static

Definition at line 234 of file twofish.c.

Referenced by av_twofish_crypt().

Variable Documentation

const uint8_t MD1[256]
static
Initial value:
= {
0x00, 0x5b, 0xb6, 0xed, 0x05, 0x5e, 0xb3, 0xe8, 0x0a, 0x51, 0xbc, 0xe7, 0x0f, 0x54, 0xb9, 0xe2,
0x14, 0x4f, 0xa2, 0xf9, 0x11, 0x4a, 0xa7, 0xfc, 0x1e, 0x45, 0xa8, 0xf3, 0x1b, 0x40, 0xad, 0xf6,
0x28, 0x73, 0x9e, 0xc5, 0x2d, 0x76, 0x9b, 0xc0, 0x22, 0x79, 0x94, 0xcf, 0x27, 0x7c, 0x91, 0xca,
0x3c, 0x67, 0x8a, 0xd1, 0x39, 0x62, 0x8f, 0xd4, 0x36, 0x6d, 0x80, 0xdb, 0x33, 0x68, 0x85, 0xde,
0x50, 0x0b, 0xe6, 0xbd, 0x55, 0x0e, 0xe3, 0xb8, 0x5a, 0x01, 0xec, 0xb7, 0x5f, 0x04, 0xe9, 0xb2,
0x44, 0x1f, 0xf2, 0xa9, 0x41, 0x1a, 0xf7, 0xac, 0x4e, 0x15, 0xf8, 0xa3, 0x4b, 0x10, 0xfd, 0xa6,
0x78, 0x23, 0xce, 0x95, 0x7d, 0x26, 0xcb, 0x90, 0x72, 0x29, 0xc4, 0x9f, 0x77, 0x2c, 0xc1, 0x9a,
0x6c, 0x37, 0xda, 0x81, 0x69, 0x32, 0xdf, 0x84, 0x66, 0x3d, 0xd0, 0x8b, 0x63, 0x38, 0xd5, 0x8e,
0xa0, 0xfb, 0x16, 0x4d, 0xa5, 0xfe, 0x13, 0x48, 0xaa, 0xf1, 0x1c, 0x47, 0xaf, 0xf4, 0x19, 0x42,
0xb4, 0xef, 0x02, 0x59, 0xb1, 0xea, 0x07, 0x5c, 0xbe, 0xe5, 0x08, 0x53, 0xbb, 0xe0, 0x0d, 0x56,
0x88, 0xd3, 0x3e, 0x65, 0x8d, 0xd6, 0x3b, 0x60, 0x82, 0xd9, 0x34, 0x6f, 0x87, 0xdc, 0x31, 0x6a,
0x9c, 0xc7, 0x2a, 0x71, 0x99, 0xc2, 0x2f, 0x74, 0x96, 0xcd, 0x20, 0x7b, 0x93, 0xc8, 0x25, 0x7e,
0xf0, 0xab, 0x46, 0x1d, 0xf5, 0xae, 0x43, 0x18, 0xfa, 0xa1, 0x4c, 0x17, 0xff, 0xa4, 0x49, 0x12,
0xe4, 0xbf, 0x52, 0x09, 0xe1, 0xba, 0x57, 0x0c, 0xee, 0xb5, 0x58, 0x03, 0xeb, 0xb0, 0x5d, 0x06,
0xd8, 0x83, 0x6e, 0x35, 0xdd, 0x86, 0x6b, 0x30, 0xd2, 0x89, 0x64, 0x3f, 0xd7, 0x8c, 0x61, 0x3a,
0xcc, 0x97, 0x7a, 0x21, 0xc9, 0x92, 0x7f, 0x24, 0xc6, 0x9d, 0x70, 0x2b, 0xc3, 0x98, 0x75, 0x2e
}

Definition at line 39 of file twofish.c.

Referenced by precomputeMDS(), and tf_h().

const uint8_t MD2[256]
static
Initial value:
= {
0x00, 0xef, 0xb7, 0x58, 0x07, 0xe8, 0xb0, 0x5f, 0x0e, 0xe1, 0xb9, 0x56, 0x09, 0xe6, 0xbe, 0x51,
0x1c, 0xf3, 0xab, 0x44, 0x1b, 0xf4, 0xac, 0x43, 0x12, 0xfd, 0xa5, 0x4a, 0x15, 0xfa, 0xa2, 0x4d,
0x38, 0xd7, 0x8f, 0x60, 0x3f, 0xd0, 0x88, 0x67, 0x36, 0xd9, 0x81, 0x6e, 0x31, 0xde, 0x86, 0x69,
0x24, 0xcb, 0x93, 0x7c, 0x23, 0xcc, 0x94, 0x7b, 0x2a, 0xc5, 0x9d, 0x72, 0x2d, 0xc2, 0x9a, 0x75,
0x70, 0x9f, 0xc7, 0x28, 0x77, 0x98, 0xc0, 0x2f, 0x7e, 0x91, 0xc9, 0x26, 0x79, 0x96, 0xce, 0x21,
0x6c, 0x83, 0xdb, 0x34, 0x6b, 0x84, 0xdc, 0x33, 0x62, 0x8d, 0xd5, 0x3a, 0x65, 0x8a, 0xd2, 0x3d,
0x48, 0xa7, 0xff, 0x10, 0x4f, 0xa0, 0xf8, 0x17, 0x46, 0xa9, 0xf1, 0x1e, 0x41, 0xae, 0xf6, 0x19,
0x54, 0xbb, 0xe3, 0x0c, 0x53, 0xbc, 0xe4, 0x0b, 0x5a, 0xb5, 0xed, 0x02, 0x5d, 0xb2, 0xea, 0x05,
0xe0, 0x0f, 0x57, 0xb8, 0xe7, 0x08, 0x50, 0xbf, 0xee, 0x01, 0x59, 0xb6, 0xe9, 0x06, 0x5e, 0xb1,
0xfc, 0x13, 0x4b, 0xa4, 0xfb, 0x14, 0x4c, 0xa3, 0xf2, 0x1d, 0x45, 0xaa, 0xf5, 0x1a, 0x42, 0xad,
0xd8, 0x37, 0x6f, 0x80, 0xdf, 0x30, 0x68, 0x87, 0xd6, 0x39, 0x61, 0x8e, 0xd1, 0x3e, 0x66, 0x89,
0xc4, 0x2b, 0x73, 0x9c, 0xc3, 0x2c, 0x74, 0x9b, 0xca, 0x25, 0x7d, 0x92, 0xcd, 0x22, 0x7a, 0x95,
0x90, 0x7f, 0x27, 0xc8, 0x97, 0x78, 0x20, 0xcf, 0x9e, 0x71, 0x29, 0xc6, 0x99, 0x76, 0x2e, 0xc1,
0x8c, 0x63, 0x3b, 0xd4, 0x8b, 0x64, 0x3c, 0xd3, 0x82, 0x6d, 0x35, 0xda, 0x85, 0x6a, 0x32, 0xdd,
0xa8, 0x47, 0x1f, 0xf0, 0xaf, 0x40, 0x18, 0xf7, 0xa6, 0x49, 0x11, 0xfe, 0xa1, 0x4e, 0x16, 0xf9,
0xb4, 0x5b, 0x03, 0xec, 0xb3, 0x5c, 0x04, 0xeb, 0xba, 0x55, 0x0d, 0xe2, 0xbd, 0x52, 0x0a, 0xe5
}

Definition at line 58 of file twofish.c.

Referenced by precomputeMDS(), and tf_h().

const uint8_t q0[256]
static
Initial value:
= {
0xa9, 0x67, 0xb3, 0xe8, 0x04, 0xfd, 0xa3, 0x76, 0x9a, 0x92, 0x80, 0x78, 0xe4, 0xdd, 0xd1, 0x38,
0x0d, 0xc6, 0x35, 0x98, 0x18, 0xf7, 0xec, 0x6c, 0x43, 0x75, 0x37, 0x26, 0xfa, 0x13, 0x94, 0x48,
0xf2, 0xd0, 0x8b, 0x30, 0x84, 0x54, 0xdf, 0x23, 0x19, 0x5b, 0x3d, 0x59, 0xf3, 0xae, 0xa2, 0x82,
0x63, 0x01, 0x83, 0x2e, 0xd9, 0x51, 0x9b, 0x7c, 0xa6, 0xeb, 0xa5, 0xbe, 0x16, 0x0c, 0xe3, 0x61,
0xc0, 0x8c, 0x3a, 0xf5, 0x73, 0x2c, 0x25, 0x0b, 0xbb, 0x4e, 0x89, 0x6b, 0x53, 0x6a, 0xb4, 0xf1,
0xe1, 0xe6, 0xbd, 0x45, 0xe2, 0xf4, 0xb6, 0x66, 0xcc, 0x95, 0x03, 0x56, 0xd4, 0x1c, 0x1e, 0xd7,
0xfb, 0xc3, 0x8e, 0xb5, 0xe9, 0xcf, 0xbf, 0xba, 0xea, 0x77, 0x39, 0xaf, 0x33, 0xc9, 0x62, 0x71,
0x81, 0x79, 0x09, 0xad, 0x24, 0xcd, 0xf9, 0xd8, 0xe5, 0xc5, 0xb9, 0x4d, 0x44, 0x08, 0x86, 0xe7,
0xa1, 0x1d, 0xaa, 0xed, 0x06, 0x70, 0xb2, 0xd2, 0x41, 0x7b, 0xa0, 0x11, 0x31, 0xc2, 0x27, 0x90,
0x20, 0xf6, 0x60, 0xff, 0x96, 0x5c, 0xb1, 0xab, 0x9e, 0x9c, 0x52, 0x1b, 0x5f, 0x93, 0x0a, 0xef,
0x91, 0x85, 0x49, 0xee, 0x2d, 0x4f, 0x8f, 0x3b, 0x47, 0x87, 0x6d, 0x46, 0xd6, 0x3e, 0x69, 0x64,
0x2a, 0xce, 0xcb, 0x2f, 0xfc, 0x97, 0x05, 0x7a, 0xac, 0x7f, 0xd5, 0x1a, 0x4b, 0x0e, 0xa7, 0x5a,
0x28, 0x14, 0x3f, 0x29, 0x88, 0x3c, 0x4c, 0x02, 0xb8, 0xda, 0xb0, 0x17, 0x55, 0x1f, 0x8a, 0x7d,
0x57, 0xc7, 0x8d, 0x74, 0xb7, 0xc4, 0x9f, 0x72, 0x7e, 0x15, 0x22, 0x12, 0x58, 0x07, 0x99, 0x34,
0x6e, 0x50, 0xde, 0x68, 0x65, 0xbc, 0xdb, 0xf8, 0xc8, 0xa8, 0x2b, 0x40, 0xdc, 0xfe, 0x32, 0xa4,
0xca, 0x10, 0x21, 0xf0, 0xd3, 0x5d, 0x0f, 0x00, 0x6f, 0x9d, 0x36, 0x42, 0x4a, 0x5e, 0xc1, 0xe0
}

Definition at line 77 of file twofish.c.

Referenced by avc_h_loop_filter_luma_mbaff_msa(), avc_loopfilter_cb_or_cr_inter_edge_hor_msa(), avc_loopfilter_cb_or_cr_inter_edge_ver_msa(), avc_loopfilter_luma_inter_edge_hor_msa(), avc_loopfilter_luma_inter_edge_ver_msa(), avc_loopfilter_luma_intra_edge_hor_msa(), avc_loopfilter_luma_intra_edge_ver_msa(), ff_loop_filter_h_44_16_msa(), ff_loop_filter_h_48_16_msa(), ff_loop_filter_h_4_8_msa(), ff_loop_filter_h_84_16_msa(), ff_loop_filter_h_88_16_msa(), ff_loop_filter_h_8_8_msa(), ff_loop_filter_v_16_8_msa(), ff_loop_filter_v_44_16_msa(), ff_loop_filter_v_48_16_msa(), ff_loop_filter_v_4_8_msa(), ff_loop_filter_v_84_16_msa(), ff_loop_filter_v_88_16_msa(), ff_loop_filter_v_8_8_msa(), ff_vp8_h_loop_filter16_inner_msa(), ff_vp8_h_loop_filter16_msa(), ff_vp8_h_loop_filter8uv_inner_msa(), ff_vp8_h_loop_filter8uv_msa(), ff_vp8_h_loop_filter_simple_msa(), ff_vp8_v_loop_filter16_inner_msa(), ff_vp8_v_loop_filter16_msa(), ff_vp8_v_loop_filter8uv_inner_msa(), ff_vp8_v_loop_filter8uv_msa(), ff_vp8_v_loop_filter_simple_msa(), filter_common(), filter_mbedge(), h264_loop_filter_chroma(), h264_loop_filter_chroma_intra(), h264_loop_filter_luma(), h264_loop_filter_luma_intra(), hev(), hevc_loop_filter_chroma(), hevc_loop_filter_luma(), hevc_loopfilter_chroma_hor_msa(), hevc_loopfilter_chroma_ver_msa(), hevc_loopfilter_luma_hor_msa(), loop_filter(), loop_filter_c2(), loop_filter_l1(), loop_filter_l2(), randomize_loopfilter_buffers(), rv40_strong_loop_filter(), search_for_quantizers_anmr(), tf_h0(), vp7_simple_limit(), vp8_filter_common_is4tap(), vp8_filter_common_isnot4tap(), vp8_h_loop_filter8_mmi(), vp8_normal_limit(), vp8_simple_limit(), vp8_v_loop_filter8_mmi(), vp9_hz_lpf_t16_16w(), vp9_hz_lpf_t4_and_t8_16w(), vp9_transpose_16x16(), vp9_transpose_16x8_to_8x16(), vp9_transpose_8x16_to_16x8(), vp9_vt_lpf_t16_16w(), vp9_vt_lpf_t16_8w(), vp9_vt_lpf_t4_and_t8_16w(), and vp9_vt_lpf_t4_and_t8_8w().

const uint8_t q1[256]
static
Initial value:
= {
0x75, 0xf3, 0xc6, 0xf4, 0xdb, 0x7b, 0xfb, 0xc8, 0x4a, 0xd3, 0xe6, 0x6b, 0x45, 0x7d, 0xe8, 0x4b,
0xd6, 0x32, 0xd8, 0xfd, 0x37, 0x71, 0xf1, 0xe1, 0x30, 0x0f, 0xf8, 0x1b, 0x87, 0xfa, 0x06, 0x3f,
0x5e, 0xba, 0xae, 0x5b, 0x8a, 0x00, 0xbc, 0x9d, 0x6d, 0xc1, 0xb1, 0x0e, 0x80, 0x5d, 0xd2, 0xd5,
0xa0, 0x84, 0x07, 0x14, 0xb5, 0x90, 0x2c, 0xa3, 0xb2, 0x73, 0x4c, 0x54, 0x92, 0x74, 0x36, 0x51,
0x38, 0xb0, 0xbd, 0x5a, 0xfc, 0x60, 0x62, 0x96, 0x6c, 0x42, 0xf7, 0x10, 0x7c, 0x28, 0x27, 0x8c,
0x13, 0x95, 0x9c, 0xc7, 0x24, 0x46, 0x3b, 0x70, 0xca, 0xe3, 0x85, 0xcb, 0x11, 0xd0, 0x93, 0xb8,
0xa6, 0x83, 0x20, 0xff, 0x9f, 0x77, 0xc3, 0xcc, 0x03, 0x6f, 0x08, 0xbf, 0x40, 0xe7, 0x2b, 0xe2,
0x79, 0x0c, 0xaa, 0x82, 0x41, 0x3a, 0xea, 0xb9, 0xe4, 0x9a, 0xa4, 0x97, 0x7e, 0xda, 0x7a, 0x17,
0x66, 0x94, 0xa1, 0x1d, 0x3d, 0xf0, 0xde, 0xb3, 0x0b, 0x72, 0xa7, 0x1c, 0xef, 0xd1, 0x53, 0x3e,
0x8f, 0x33, 0x26, 0x5f, 0xec, 0x76, 0x2a, 0x49, 0x81, 0x88, 0xee, 0x21, 0xc4, 0x1a, 0xeb, 0xd9,
0xc5, 0x39, 0x99, 0xcd, 0xad, 0x31, 0x8b, 0x01, 0x18, 0x23, 0xdd, 0x1f, 0x4e, 0x2d, 0xf9, 0x48,
0x4f, 0xf2, 0x65, 0x8e, 0x78, 0x5c, 0x58, 0x19, 0x8d, 0xe5, 0x98, 0x57, 0x67, 0x7f, 0x05, 0x64,
0xaf, 0x63, 0xb6, 0xfe, 0xf5, 0xb7, 0x3c, 0xa5, 0xce, 0xe9, 0x68, 0x44, 0xe0, 0x4d, 0x43, 0x69,
0x29, 0x2e, 0xac, 0x15, 0x59, 0xa8, 0x0a, 0x9e, 0x6e, 0x47, 0xdf, 0x34, 0x35, 0x6a, 0xcf, 0xdc,
0x22, 0xc9, 0xc0, 0x9b, 0x89, 0xd4, 0xed, 0xab, 0x12, 0xa2, 0x0d, 0x52, 0xbb, 0x02, 0x2f, 0xa9,
0xd7, 0x61, 0x1e, 0xb4, 0x50, 0x04, 0xf6, 0xc2, 0x16, 0x25, 0x86, 0x56, 0x55, 0x09, 0xbe, 0x91
}

Definition at line 96 of file twofish.c.

Referenced by av_inv_q(), avc_loopfilter_luma_inter_edge_hor_msa(), avc_loopfilter_luma_inter_edge_ver_msa(), avc_loopfilter_luma_intra_edge_hor_msa(), avc_loopfilter_luma_intra_edge_ver_msa(), bessel(), encode_frame(), ff_dh_compute_shared_secret_key(), ff_dh_generate_public_key(), ff_loop_filter_h_44_16_msa(), ff_loop_filter_h_48_16_msa(), ff_loop_filter_h_4_8_msa(), ff_loop_filter_h_84_16_msa(), ff_loop_filter_h_88_16_msa(), ff_loop_filter_h_8_8_msa(), ff_loop_filter_v_16_8_msa(), ff_loop_filter_v_44_16_msa(), ff_loop_filter_v_48_16_msa(), ff_loop_filter_v_4_8_msa(), ff_loop_filter_v_84_16_msa(), ff_loop_filter_v_88_16_msa(), ff_loop_filter_v_8_8_msa(), ff_vc1_pred_dc(), ff_vp8_h_loop_filter16_inner_msa(), ff_vp8_h_loop_filter16_msa(), ff_vp8_h_loop_filter8uv_inner_msa(), ff_vp8_h_loop_filter8uv_msa(), ff_vp8_h_loop_filter_simple_msa(), ff_vp8_v_loop_filter16_inner_msa(), ff_vp8_v_loop_filter16_msa(), ff_vp8_v_loop_filter8uv_inner_msa(), ff_vp8_v_loop_filter8uv_msa(), ff_vp8_v_loop_filter_simple_msa(), filter_common(), filter_mbedge(), h264_loop_filter_chroma(), h264_loop_filter_chroma_intra(), h264_loop_filter_luma(), h264_loop_filter_luma_intra(), hev(), hevc_loop_filter_chroma(), hevc_loop_filter_luma(), hevc_loopfilter_chroma_hor_msa(), hevc_loopfilter_chroma_ver_msa(), hevc_loopfilter_luma_hor_msa(), loop_filter(), randomize_loopfilter_buffers(), rv40_strong_loop_filter(), search_for_quantizers_anmr(), tf_h0(), vc1_decode_i_block_adv(), vc1_decode_intra_block(), vp8_filter_common_is4tap(), vp8_filter_common_isnot4tap(), vp8_h_loop_filter8_mmi(), vp8_normal_limit(), vp8_simple_limit(), vp8_v_loop_filter8_mmi(), vp9_hz_lpf_t16_16w(), vp9_hz_lpf_t4_and_t8_16w(), vp9_transpose_16x16(), vp9_transpose_16x8_to_8x16(), vp9_transpose_8x16_to_16x8(), vp9_vt_lpf_t16_16w(), vp9_vt_lpf_t16_8w(), vp9_vt_lpf_t4_and_t8_16w(), and vp9_vt_lpf_t4_and_t8_8w().