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四種加密算法之DES源代碼-C++

2018-12-06 16:09 作者:校招VIP  | 我要投稿

  1. //////////////////////////////////////////////////////////////////////////??

  2. /*?

  3. ????Provided?by?朱孟斌,?National?University?Of?Technology?

  4. ????Email:?zmb.tsubasa@gmail.com?

  5. ????This?product?is?free?for?use.?

  6. */??

  7. //////////////////////////////////////////////////////////////////////////??

  8. #ifndef?Des_H??

  9. #define?Des_H??

  10. ??

  11. //!?enum????bool{false,true};???

  12. /*!???

  13. if?bool?is?not?supported,use?this?or?just?replace?with?char?and?use?1?for?true,0?for?false;?

  14. @see?enum????{ENCRYPT,DECRYPT};?

  15. */??

  16. enum????{ENCRYPT,DECRYPT};??

  17. /*@brief??16圈子密鑰*/??

  18. static?bool?SubKey[2][16][48];//?16圈子密鑰??

  19. /*@brief?3次DES標(biāo)志*/??

  20. static?bool?Is3DES;//?3次DES標(biāo)志??

  21. static?char?Tmp[256];??

  22. static?char?deskey[16];??

  23. typedef?bool????(*PSubKey)[16][48];??

  24. ??

  25. class?_declspec(dllexport)?Des??

  26. {??

  27. public:??

  28. ????Des();??

  29. ????~Des();??

  30. ????//!?Type—ENCRYPT:加密,DECRYPT:解密??

  31. ????/*!??

  32. ????輸出緩沖區(qū)(Out)的長度?>=?((datalen+7)/8)*8,即比datalen大的且是8的倍數(shù)的最小正整數(shù)?

  33. ????In?可以=?Out,此時加/解密后將覆蓋輸入緩沖區(qū)(In)的內(nèi)容?

  34. ????當(dāng)keylen>8時系統(tǒng)自動使用3次DES加/解密,否則使用標(biāo)準(zhǔn)DES加/解密.超過16字節(jié)后只取前16字節(jié)?

  35. ????@see?bool?Des_Go(char?*Out,char?*In,long?datalen,const?char?*Key,int?keylen,bool?Type?=?ENCRYPT);?

  36. ????*/??

  37. ??

  38. ????bool?Des_Go(char?*Out,char?*In,long?datalen,const?char?*Key,int?keylen,bool?Type?=?ENCRYPT);??

  39. ??

  40. private:??

  41. ????/*!?@brief?標(biāo)準(zhǔn)DES加/解密?

  42. ????@see?static?void?DES(char?Out[8],?char?In[8],?const?PSubKey?pSubKey,?bool?Type);?

  43. ????*/??

  44. ????static?void?DES(char?Out[8],?char?In[8],?const?PSubKey?pSubKey,?bool?Type);//標(biāo)準(zhǔn)DES加/解密??

  45. ????/*!?@brief?設(shè)置密鑰?

  46. ????@see?static?void?SetKey(const?char*?Key,?int?len);?

  47. ????*/??

  48. ????static?void?SetKey(const?char*?Key,?int?len);//?設(shè)置密鑰??

  49. ????/*!?@brief?設(shè)置子密鑰?

  50. ????@see?static?void?SetSubKey(PSubKey?pSubKey,?const?char?Key[8]);?

  51. ????*/??

  52. ????static?void?SetSubKey(PSubKey?pSubKey,?const?char?Key[8]);//?設(shè)置子密鑰??

  53. ????/*!?@brief?f?函數(shù)?

  54. ????@see?static?void?F_func(bool?In[32],?const?bool?Ki[48]);?

  55. ????*/??

  56. ????static?void?F_func(bool?In[32],?const?bool?Ki[48]);//?f?函數(shù)??

  57. ????/*!?@brief?S?盒代替?

  58. ????@see?static?void?S_func(bool?Out[32],?const?bool?In[48]);?

  59. ????*/??

  60. ????static?void?S_func(bool?Out[32],?const?bool?In[48]);//?S?盒代替??

  61. ????/*!?@brief?變換?

  62. ????@see?static?void?Transform(bool?*Out,?bool?*In,?const?char?*Table,?int?len);?

  63. ????*/??

  64. ????static?void?Transform(bool?*Out,?bool?*In,?const?char?*Table,?int?len);//?變換??

  65. ????/*!?@brief?異或?

  66. ????@see?static?void?Xor(bool?*InA,?const?bool?*InB,?int?len);?

  67. ????*/??

  68. ????static?void?Xor(bool?*InA,?const?bool?*InB,?int?len);//?異或??

  69. ????/*!?@brief?循環(huán)左移?

  70. ????@see?static?void?RotateL(bool?*In,?int?len,?int?loop);?

  71. ????*/??

  72. ????static?void?RotateL(bool?*In,?int?len,?int?loop);//?循環(huán)左移??

  73. ????/*!?@brief?字節(jié)組轉(zhuǎn)換成位組?

  74. ????@see?static?void?ByteToBit(bool?*Out,?const?char?*In,?int?bits);?

  75. ????*/??

  76. ????static?void?ByteToBit(bool?*Out,?const?char?*In,?int?bits);//?字節(jié)組轉(zhuǎn)換成位組??

  77. ????/*!?@brief?位組轉(zhuǎn)換成字節(jié)組?

  78. ????@see?static?void?BitToByte(char?*Out,?const?bool?*In,?int?bits);?

  79. ????*/??

  80. ????static?void?BitToByte(char?*Out,?const?bool?*In,?int?bits);//?位組轉(zhuǎn)換成字節(jié)組??

  81. ??

  82. };??

  83. //////////////////////////////////////////////////////////////////////////??

  84. //////////////////////////////////////////////////////////////////////////??

  85. #endif??


DES.cpp文件：

  1. //////////////////////////////////////////////////////////////////////////??

  2. /*?

  3. ????Provided?by?朱孟斌,?National?University?Of?Technology?

  4. ????Email:?zmb.tsubasa@gmail.com?

  5. ????This?product?is?free?for?use.?

  6. */??

  7. //////////////////////////////////////////////////////////////////////////??

  8. ??

  9. #include?"memory.h"??

  10. #include?"Des.h"??

  11. ??

  12. //////////////////////////////////////////////////////////////////////////??

  13. ??

  14. //?initial?permutation?IP??

  15. const?static?char?IP_Table[64]?=?{??

  16. ????58,?50,?42,?34,?26,?18,?10,?2,?60,?52,?44,?36,?28,?20,?12,?4,??

  17. ????62,?54,?46,?38,?30,?22,?14,?6,?64,?56,?48,?40,?32,?24,?16,?8,??

  18. ????57,?49,?41,?33,?25,?17,??9,?1,?59,?51,?43,?35,?27,?19,?11,?3,??

  19. ????61,?53,?45,?37,?29,?21,?13,?5,?63,?55,?47,?39,?31,?23,?15,?7??

  20. };??

  21. //?final?permutation?IP^-1???

  22. const?static?char?IPR_Table[64]?=?{??

  23. ????40,?8,?48,?16,?56,?24,?64,?32,?39,?7,?47,?15,?55,?23,?63,?31,??

  24. ????38,?6,?46,?14,?54,?22,?62,?30,?37,?5,?45,?13,?53,?21,?61,?29,??

  25. ????36,?4,?44,?12,?52,?20,?60,?28,?35,?3,?43,?11,?51,?19,?59,?27,??

  26. ????34,?2,?42,?10,?50,?18,?58,?26,?33,?1,?41,??9,?49,?17,?57,?25??

  27. };??

  28. //?expansion?operation?matrix??

  29. static?const?char?E_Table[48]?=?{??

  30. ????32,??1,??2,??3,??4,??5,??4,??5,??6,??7,??8,??9,??

  31. ?????8,??9,?10,?11,?12,?13,?12,?13,?14,?15,?16,?17,??

  32. ????16,?17,?18,?19,?20,?21,?20,?21,?22,?23,?24,?25,??

  33. ????24,?25,?26,?27,?28,?29,?28,?29,?30,?31,?32,??1??

  34. };??

  35. //?32-bit?permutation?function?P?used?on?the?output?of?the?S-boxes???

  36. const?static?char?P_Table[32]?=?{??

  37. ????16,?7,?20,?21,?29,?12,?28,?17,?1,??15,?23,?26,?5,??18,?31,?10,??

  38. ????2,??8,?24,?14,?32,?27,?3,??9,??19,?13,?30,?6,??22,?11,?4,??25??

  39. };??

  40. //?permuted?choice?table?(key)???

  41. const?static?char?PC1_Table[56]?=?{??

  42. ????57,?49,?41,?33,?25,?17,??9,??1,?58,?50,?42,?34,?26,?18,??

  43. ????10,??2,?59,?51,?43,?35,?27,?19,?11,??3,?60,?52,?44,?36,??

  44. ????63,?55,?47,?39,?31,?23,?15,??7,?62,?54,?46,?38,?30,?22,??

  45. ????14,??6,?61,?53,?45,?37,?29,?21,?13,??5,?28,?20,?12,??4??

  46. };??

  47. //?permuted?choice?key?(table)???

  48. const?static?char?PC2_Table[48]?=?{??

  49. ????14,?17,?11,?24,??1,??5,??3,?28,?15,??6,?21,?10,??

  50. ????23,?19,?12,??4,?26,??8,?16,??7,?27,?20,?13,??2,??

  51. ????41,?52,?31,?37,?47,?55,?30,?40,?51,?45,?33,?48,??

  52. ????44,?49,?39,?56,?34,?53,?46,?42,?50,?36,?29,?32??

  53. };??

  54. //?number?left?rotations?of?pc1???

  55. const?static?char?LOOP_Table[16]?=?{??

  56. ????1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1??

  57. };??

  58. //?The?(in)famous?S-boxes???

  59. const?static?char?S_Box[8][4][16]?=?{??

  60. ????//?S1???

  61. ????14,??4,?13,??1,??2,?15,?11,??8,??3,?10,??6,?12,??5,??9,??0,??7,??

  62. ?????0,?15,??7,??4,?14,??2,?13,??1,?10,??6,?12,?11,??9,??5,??3,??8,??

  63. ?????4,??1,?14,??8,?13,??6,??2,?11,?15,?12,??9,??7,??3,?10,??5,??0,??

  64. ????15,?12,??8,??2,??4,??9,??1,??7,??5,?11,??3,?14,?10,??0,??6,?13,??

  65. ????//?S2???

  66. ????15,??1,??8,?14,??6,?11,??3,??4,??9,??7,??2,?13,?12,??0,??5,?10,??

  67. ?????3,?13,??4,??7,?15,??2,??8,?14,?12,??0,??1,?10,??6,??9,?11,??5,??

  68. ?????0,?14,??7,?11,?10,??4,?13,??1,??5,??8,?12,??6,??9,??3,??2,?15,??

  69. ????13,??8,?10,??1,??3,?15,??4,??2,?11,??6,??7,?12,??0,??5,?14,??9,??

  70. ????//?S3???

  71. ????10,??0,??9,?14,??6,??3,?15,??5,??1,?13,?12,??7,?11,??4,??2,??8,??

  72. ????13,??7,??0,??9,??3,??4,??6,?10,??2,??8,??5,?14,?12,?11,?15,??1,??

  73. ????13,??6,??4,??9,??8,?15,??3,??0,?11,??1,??2,?12,??5,?10,?14,??7,??

  74. ?????1,?10,?13,??0,??6,??9,??8,??7,??4,?15,?14,??3,?11,??5,??2,?12,??

  75. ????//?S4???

  76. ?????7,?13,?14,??3,??0,??6,??9,?10,??1,??2,??8,??5,?11,?12,??4,?15,??

  77. ????13,??8,?11,??5,??6,?15,??0,??3,??4,??7,??2,?12,??1,?10,?14,??9,??

  78. ????10,??6,??9,??0,?12,?11,??7,?13,?15,??1,??3,?14,??5,??2,??8,??4,??

  79. ?????3,?15,??0,??6,?10,??1,?13,??8,??9,??4,??5,?11,?12,??7,??2,?14,??

  80. ????//?S5???

  81. ?????2,?12,??4,??1,??7,?10,?11,??6,??8,??5,??3,?15,?13,??0,?14,??9,??

  82. ????14,?11,??2,?12,??4,??7,?13,??1,??5,??0,?15,?10,??3,??9,??8,??6,??

  83. ?????4,??2,??1,?11,?10,?13,??7,??8,?15,??9,?12,??5,??6,??3,??0,?14,??

  84. ????11,??8,?12,??7,??1,?14,??2,?13,??6,?15,??0,??9,?10,??4,??5,??3,??

  85. ????//?S6???

  86. ????12,??1,?10,?15,??9,??2,??6,??8,??0,?13,??3,??4,?14,??7,??5,?11,??

  87. ????10,?15,??4,??2,??7,?12,??9,??5,??6,??1,?13,?14,??0,?11,??3,??8,??

  88. ?????9,?14,?15,??5,??2,??8,?12,??3,??7,??0,??4,?10,??1,?13,?11,??6,??

  89. ?????4,??3,??2,?12,??9,??5,?15,?10,?11,?14,??1,??7,??6,??0,??8,?13,??

  90. ????//?S7???

  91. ?????4,?11,??2,?14,?15,??0,??8,?13,??3,?12,??9,??7,??5,?10,??6,??1,??

  92. ????13,??0,?11,??7,??4,??9,??1,?10,?14,??3,??5,?12,??2,?15,??8,??6,??

  93. ?????1,??4,?11,?13,?12,??3,??7,?14,?10,?15,??6,??8,??0,??5,??9,??2,??

  94. ?????6,?11,?13,??8,??1,??4,?10,??7,??9,??5,??0,?15,?14,??2,??3,?12,??

  95. ????//?S8???

  96. ????13,??2,??8,??4,??6,?15,?11,??1,?10,??9,??3,?14,??5,??0,?12,??7,??

  97. ?????1,?15,?13,??8,?10,??3,??7,??4,?12,??5,??6,?11,??0,?14,??9,??2,??

  98. ?????7,?11,??4,??1,??9,?12,?14,??2,??0,??6,?10,?13,?15,??3,??5,??8,??

  99. ?????2,??1,?14,??7,??4,?10,??8,?13,?15,?12,??9,??0,??3,??5,??6,?11??

  100. };??

  101. ??

  102. //////////////////////////////////////////////////////////////////////////??

  103. //?Code?starts:??

  104. //////////////////////////////////////////////////////////////////////////??

  105. Des::Des()??

  106. {??

  107. ??

  108. }??

  109. Des::~Des()??

  110. {??

  111. ??

  112. }??

  113. bool?Des::Des_Go(char?*Out,?char?*In,?long?datalen,?const?char?*Key,?int?keylen,?bool?Type)??

  114. {??

  115. ????if(?!(?Out?&&?In?&&?Key?&&?(datalen=(datalen+7)&0xfffffff8)?)?)???

  116. ????????return?false;??

  117. ????SetKey(Key,?keylen);??

  118. ????if(?!Is3DES?)?{???//?1次DES??

  119. ????????for(long?i=0,j=datalen>>3;?i<j;?++i,Out+=8,In+=8)??

  120. ????????????DES(Out,?In,?&SubKey[0],?Type);??

  121. ????}?else{???//?3次DES?加密:加(key0)-解(key1)-加(key0)?解密::解(key0)-加(key1)-解(key0)??

  122. ????????for(long?i=0,j=datalen>>3;?i<j;?++i,Out+=8,In+=8)?{??

  123. ????????????DES(Out,?In,??&SubKey[0],?Type);??

  124. ????????????DES(Out,?Out,?&SubKey[1],?!Type);??

  125. ????????????DES(Out,?Out,?&SubKey[0],?Type);??

  126. ????????}??

  127. ????}??

  128. ????return?true;??

  129. }??

  130. void?Des::SetKey(const?char*?Key,?int?len)??

  131. {??

  132. ????memset(deskey,?0,?16);??

  133. ????memcpy(deskey,?Key,?len>16?16:len);??

  134. ????SetSubKey(&SubKey[0],?&deskey[0]);??

  135. ????Is3DES?=?len>8???(SetSubKey(&SubKey[1],?&deskey[8]),?true)?:?false;??

  136. }??

  137. void?Des::DES(char?Out[8],?char?In[8],?const?PSubKey?pSubKey,?bool?Type)??

  138. {??

  139. ????static?bool?M[64],?tmp[32],?*Li=&M[0],?*Ri=&M[32];??

  140. ????ByteToBit(M,?In,?64);??

  141. ????Transform(M,?M,?IP_Table,?64);??

  142. ????if(?Type?==?ENCRYPT?){??

  143. ????????for(int?i=0;?i<16;?++i)?{??

  144. ????????????memcpy(tmp,?Ri,?32);??

  145. ????????????F_func(Ri,?(*pSubKey)[i]);??

  146. ????????????Xor(Ri,?Li,?32);??

  147. ????????????memcpy(Li,?tmp,?32);??

  148. ????????}??

  149. ????}else{??

  150. ????????for(int?i=15;?i>=0;?--i)?{??

  151. ????????????memcpy(tmp,?Li,?32);??

  152. ????????????F_func(Li,?(*pSubKey)[i]);??

  153. ????????????Xor(Li,?Ri,?32);??

  154. ????????????memcpy(Ri,?tmp,?32);??

  155. ????????}??

  156. ????}??

  157. ????Transform(M,?M,?IPR_Table,?64);??

  158. ????BitToByte(Out,?M,?64);??

  159. }??

  160. void?Des::SetSubKey(PSubKey?pSubKey,?const?char?Key[8])??

  161. {??

  162. ????static?bool?K[64],?*KL=&K[0],?*KR=&K[28];??

  163. ????ByteToBit(K,?Key,?64);??

  164. ????Transform(K,?K,?PC1_Table,?56);??

  165. ????for(int?i=0;?i<16;?++i)?{??

  166. ????????RotateL(KL,?28,?LOOP_Table[i]);??

  167. ????????RotateL(KR,?28,?LOOP_Table[i]);??

  168. ????????Transform((*pSubKey)[i],?K,?PC2_Table,?48);??

  169. ????}??

  170. }??

  171. void?Des::F_func(bool?In[32],?const?bool?Ki[48])??

  172. {??

  173. ????static?bool?MR[48];??

  174. ????Transform(MR,?In,?E_Table,?48);??

  175. ????Xor(MR,?Ki,?48);??

  176. ????S_func(In,?MR);??

  177. ????Transform(In,?In,?P_Table,?32);??

  178. }??

  179. void?Des::S_func(bool?Out[32],?const?bool?In[48])??

  180. {??

  181. ????for(char?i=0,j,k;?i<8;?++i,In+=6,Out+=4)?{??

  182. ????????j?=?(In[0]<<1)?+?In[5];??

  183. ????????k?=?(In[1]<<3)?+?(In[2]<<2)?+?(In[3]<<1)?+?In[4];??

  184. ????????ByteToBit(Out,?&S_Box[i][j][k],?4);??

  185. ????}??

  186. }??

  187. void?Des::Transform(bool?*Out,?bool?*In,?const?char?*Table,?int?len)??

  188. {??

  189. ????for(int?i=0;?i<len;?++i)??

  190. ????????Tmp[i]?=?In[?Table[i]-1?];??

  191. ????memcpy(Out,?Tmp,?len);??

  192. }??

  193. void?Des::Xor(bool?*InA,?const?bool?*InB,?int?len)??

  194. {??

  195. ????for(int?i=0;?i<len;?++i)??

  196. ????????InA[i]?^=?InB[i];??

  197. }??

  198. void?Des::RotateL(bool?*In,?int?len,?int?loop)??

  199. {??

  200. ????memcpy(Tmp,?In,?loop);??

  201. ????memcpy(In,?In+loop,?len-loop);??

  202. ????memcpy(In+len-loop,?Tmp,?loop);??

  203. }??

  204. void?Des::ByteToBit(bool?*Out,?const?char?*In,?int?bits)??

  205. {??

  206. ????for(int?i=0;?i<bits;?++i)??

  207. ????????Out[i]?=?(In[i>>3]>>(i&7))?&?1;??

  208. }??

  209. void?Des::BitToByte(char?*Out,?const?bool?*In,?int?bits)??

  210. {??

  211. ????memset(Out,?0,?bits>>3);??

  212. ????for(int?i=0;?i<bits;?++i)??

  213. ????????Out[i>>3]?|=?In[i]<<(i&7);??

  214. }??

  215. //////////////////////////////////////////////////////////////////////////??

  216. //?Code?ends.??

  217. //////////////////////////////////////////////////////////////////////////?




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四種加密算法之DES源代碼-C++的評論 (共 條)

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