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  • 大小: 3KB
    文件類型: .zip
    金幣: 2
    下載: 0 次
    發布日期: 2021-05-23
  • 語言: C/C++
  • 標簽: SM4??C實現??

資源簡介

SM4分組密碼算法是一個迭代分組密碼算法，由加解密算法和密鑰擴展算法組成。SM4分組密碼算法采用非平衡Feistel結構，分組長度為128b密鑰長度為128b。加密算法與密鑰擴展算法均采用非線性迭代結構。加密運算和解密運算的算法結構相同，解密運算的輪密鑰的使用順序與加密運算相反。

資源截圖

代碼片段和文件信息 

#include?
#include?

#ifndef?XYSSL_SM4_H
#define?XYSSL_SM4_H

#define?SM4_ENCRYPT?????1
#define?SM4_DECRYPT?????0

/**
*?\brief??????????SM4?context?structure
*/
typedef?struct{
????????int?mode;???????????????????/*!????????unsigned?long?sk[32];???????/*!}sm4_context;

#ifdef?__cplusplus
extern?“C“?{
#endif

/**
?*?\brief??????????SM4?key?schedule?（128-bit?encryption）
?*
?*?\param?ctx??????SM4?context?to?be?initialized
?*?\param?key??????16-byte?secret?key
?*/
????void?sm4_setkey_enc（?sm4_context?*ctx?unsigned?char?key[16]?）;

/**
?*?\brief??????????SM4?key?schedule?（128-bit?decryption）
?*
?*?\param?ctx??????SM4?context?to?be?initialized
?*?\param?key??????16-byte?secret?key
?*/
void?sm4_setkey_dec（?sm4_context?*ctx?unsigned?char?key[16]?）;

?/**
?*?\brief??????????SM4-ECB?block?encryption/decryption
?*?\param?ctx??????SM4?context
?*?\param?mode?????SM4_ENCRYPT?or?SM4_DECRYPT
?*?\param?length???length?of?the?input?data
?*?\param?input????input?block
?*?\param?output???output?block
?*/
void?sm4_crypt_ecb（?sm4_context?*ctx
int?mode????int?length????unsigned?char?*input????unsigned?char?*output）;

#ifdef?__cplusplus
}
#endif
#endif

/*
?*?32-bit?integer?manipulation?macros?（big?endian）
?*/
#ifndef?GET_ULONG_BE
#define?GET_ULONG_BE（nbi）?????????????????????????????\
{???????????????????????????????????????????????????????\
????（n）?=?（?（unsigned?long）?（b）[（i）????]?<?????????|?（?（unsigned?long）?（b）[（i）?+?1]?<?????????|?（?（unsigned?long）?（b）[（i）?+?2]?<?????????|?（?（unsigned?long）?（b）[（i）?+?3]???????）;???????\
}
#endif


#ifndef?PUT_ULONG_BE
#define?PUT_ULONG_BE（nbi）?????????????????????????????\
{???????????????????????????????????????????????????????\
????（b）[（i）????]?=?（unsigned?char）?（?（n）?>>?24?）;???????\
????（b）[（i）?+?1]?=?（unsigned?char）?（?（n）?>>?16?）;???????\
????（b）[（i）?+?2]?=?（unsigned?char）?（?（n）?>>??8?）;???????\
????（b）[（i）?+?3]?=?（unsigned?char）?（?（n）???????）;???????\
}
#endif

/*
?*rotate?shift?left?marco?definition
?*
*/
#define??SHL（xn）?（（（x）?&?0xFFFFFFFF）?<#define?ROTL（xn）?（SHL（（x）n）?|?（（x）?>>?（32?-?n）））
#define?SWAP（ab）?{?unsigned?long?t?=?a;?a?=?b;?b?=?t;?t?=?0;?}

/*
?*?Expanded?SM4?S-boxes
/*?Sbox?table:?8bits?input?convert?to?8?bits?output*/
static?const?unsigned?char?SboxTable[16][16]?=
{
{0xd60x900xe90xfe0xcc0xe10x3d0xb70x160xb60x140xc20x280xfb0x2c0x05}
{0x2b0x670x9a0x760x2a0xbe0x040xc30xaa0x440x130x260x490x860x060x99}
{0x9c0x420x500xf40x910xef0x980x7a0x330x540x0b0x430xed0xcf0xac0x62}
{0xe40xb30x1c0xa90xc90x080xe80x950x800xdf0x940xfa0x750x8f0x3f0xa6}
{0x470x070xa70xfc0xf30x730x170xba0x830x590x3c0x190xe60x850x4f0xa8}
{0x680x6b0x810xb20x710x640xda0x8b0xf80xeb0x0f0x4b0x700x560x9d0x35}
{0x1e0x240x0e0x5e0x63

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????9467??2018-06-07?13:29??SM4.c

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