?? md5.c
字號:
( FSb[ (uint8) ( RK[3] >> 8 ) ] << 16 ) ^ ( FSb[ (uint8) ( RK[3] ) ] << 8 ) ^ ( FSb[ (uint8) ( RK[3] >> 24 ) ] ); RK[5] = RK[1] ^ RK[4]; RK[6] = RK[2] ^ RK[5]; RK[7] = RK[3] ^ RK[6]; } break; case 192: for( i = 0; i < 8; i++, RK += 6 ) { RK[6] = RK[0] ^ RCON[i] ^ ( FSb[ (uint8) ( RK[5] >> 16 ) ] << 24 ) ^ ( FSb[ (uint8) ( RK[5] >> 8 ) ] << 16 ) ^ ( FSb[ (uint8) ( RK[5] ) ] << 8 ) ^ ( FSb[ (uint8) ( RK[5] >> 24 ) ] ); RK[7] = RK[1] ^ RK[6]; RK[8] = RK[2] ^ RK[7]; RK[9] = RK[3] ^ RK[8]; RK[10] = RK[4] ^ RK[9]; RK[11] = RK[5] ^ RK[10]; } break; case 256: for( i = 0; i < 7; i++, RK += 8 ) { RK[8] = RK[0] ^ RCON[i] ^ ( FSb[ (uint8) ( RK[7] >> 16 ) ] << 24 ) ^ ( FSb[ (uint8) ( RK[7] >> 8 ) ] << 16 ) ^ ( FSb[ (uint8) ( RK[7] ) ] << 8 ) ^ ( FSb[ (uint8) ( RK[7] >> 24 ) ] ); RK[9] = RK[1] ^ RK[8]; RK[10] = RK[2] ^ RK[9]; RK[11] = RK[3] ^ RK[10]; RK[12] = RK[4] ^ ( FSb[ (uint8) ( RK[11] >> 24 ) ] << 24 ) ^ ( FSb[ (uint8) ( RK[11] >> 16 ) ] << 16 ) ^ ( FSb[ (uint8) ( RK[11] >> 8 ) ] << 8 ) ^ ( FSb[ (uint8) ( RK[11] ) ] ); RK[13] = RK[5] ^ RK[12]; RK[14] = RK[6] ^ RK[13]; RK[15] = RK[7] ^ RK[14]; } break; } /* setup decryption round keys */ if( KT_init ) { for( i = 0; i < 256; i++ ) { KT0[i] = RT0[ FSb[i] ]; KT1[i] = RT1[ FSb[i] ]; KT2[i] = RT2[ FSb[i] ]; KT3[i] = RT3[ FSb[i] ]; } KT_init = 0; } SK = ctx->drk; *SK++ = *RK++; *SK++ = *RK++; *SK++ = *RK++; *SK++ = *RK++; for( i = 1; i < ctx->nr; i++ ) { RK -= 8; *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^ KT1[ (uint8) ( *RK >> 16 ) ] ^ KT2[ (uint8) ( *RK >> 8 ) ] ^ KT3[ (uint8) ( *RK ) ]; RK++; *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^ KT1[ (uint8) ( *RK >> 16 ) ] ^ KT2[ (uint8) ( *RK >> 8 ) ] ^ KT3[ (uint8) ( *RK ) ]; RK++; *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^ KT1[ (uint8) ( *RK >> 16 ) ] ^ KT2[ (uint8) ( *RK >> 8 ) ] ^ KT3[ (uint8) ( *RK ) ]; RK++; *SK++ = KT0[ (uint8) ( *RK >> 24 ) ] ^ KT1[ (uint8) ( *RK >> 16 ) ] ^ KT2[ (uint8) ( *RK >> 8 ) ] ^ KT3[ (uint8) ( *RK ) ]; RK++; } RK -= 8; *SK++ = *RK++; *SK++ = *RK++; *SK++ = *RK++; *SK++ = *RK++; return( 0 );}/* AES 128-bit block encryption routine */void aes_encrypt(aes_context *ctx, uint8 input[16], uint8 output[16] ){ uint32 *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3; RK = ctx->erk; GET_UINT32( X0, input, 0 ); X0 ^= RK[0]; GET_UINT32( X1, input, 4 ); X1 ^= RK[1]; GET_UINT32( X2, input, 8 ); X2 ^= RK[2]; GET_UINT32( X3, input, 12 ); X3 ^= RK[3];#define AES_FROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \{ \ RK += 4; \ \ X0 = RK[0] ^ FT0[ (uint8) ( Y0 >> 24 ) ] ^ \ FT1[ (uint8) ( Y1 >> 16 ) ] ^ \ FT2[ (uint8) ( Y2 >> 8 ) ] ^ \ FT3[ (uint8) ( Y3 ) ]; \ \ X1 = RK[1] ^ FT0[ (uint8) ( Y1 >> 24 ) ] ^ \ FT1[ (uint8) ( Y2 >> 16 ) ] ^ \ FT2[ (uint8) ( Y3 >> 8 ) ] ^ \ FT3[ (uint8) ( Y0 ) ]; \ \ X2 = RK[2] ^ FT0[ (uint8) ( Y2 >> 24 ) ] ^ \ FT1[ (uint8) ( Y3 >> 16 ) ] ^ \ FT2[ (uint8) ( Y0 >> 8 ) ] ^ \ FT3[ (uint8) ( Y1 ) ]; \ \ X3 = RK[3] ^ FT0[ (uint8) ( Y3 >> 24 ) ] ^ \ FT1[ (uint8) ( Y0 >> 16 ) ] ^ \ FT2[ (uint8) ( Y1 >> 8 ) ] ^ \ FT3[ (uint8) ( Y2 ) ]; \} AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 1 */ AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 2 */ AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 3 */ AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 4 */ AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 5 */ AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 6 */ AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 7 */ AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 8 */ AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 9 */ if( ctx->nr > 10 ) { AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 10 */ AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 11 */ } if( ctx->nr > 12 ) { AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 12 */ AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 13 */ } /* last round */ RK += 4; X0 = RK[0] ^ ( FSb[ (uint8) ( Y0 >> 24 ) ] << 24 ) ^ ( FSb[ (uint8) ( Y1 >> 16 ) ] << 16 ) ^ ( FSb[ (uint8) ( Y2 >> 8 ) ] << 8 ) ^ ( FSb[ (uint8) ( Y3 ) ] ); X1 = RK[1] ^ ( FSb[ (uint8) ( Y1 >> 24 ) ] << 24 ) ^ ( FSb[ (uint8) ( Y2 >> 16 ) ] << 16 ) ^ ( FSb[ (uint8) ( Y3 >> 8 ) ] << 8 ) ^ ( FSb[ (uint8) ( Y0 ) ] ); X2 = RK[2] ^ ( FSb[ (uint8) ( Y2 >> 24 ) ] << 24 ) ^ ( FSb[ (uint8) ( Y3 >> 16 ) ] << 16 ) ^ ( FSb[ (uint8) ( Y0 >> 8 ) ] << 8 ) ^ ( FSb[ (uint8) ( Y1 ) ] ); X3 = RK[3] ^ ( FSb[ (uint8) ( Y3 >> 24 ) ] << 24 ) ^ ( FSb[ (uint8) ( Y0 >> 16 ) ] << 16 ) ^ ( FSb[ (uint8) ( Y1 >> 8 ) ] << 8 ) ^ ( FSb[ (uint8) ( Y2 ) ] ); PUT_UINT32( X0, output, 0 ); PUT_UINT32( X1, output, 4 ); PUT_UINT32( X2, output, 8 ); PUT_UINT32( X3, output, 12 );}/* AES 128-bit block decryption routine */void aes_decrypt( aes_context *ctx, uint8 input[16], uint8 output[16] ){ uint32 *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3; RK = ctx->drk; GET_UINT32( X0, input, 0 ); X0 ^= RK[0]; GET_UINT32( X1, input, 4 ); X1 ^= RK[1]; GET_UINT32( X2, input, 8 ); X2 ^= RK[2]; GET_UINT32( X3, input, 12 ); X3 ^= RK[3];#define AES_RROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3) \{ \ RK += 4; \ \ X0 = RK[0] ^ RT0[ (uint8) ( Y0 >> 24 ) ] ^ \ RT1[ (uint8) ( Y3 >> 16 ) ] ^ \ RT2[ (uint8) ( Y2 >> 8 ) ] ^ \ RT3[ (uint8) ( Y1 ) ]; \ \ X1 = RK[1] ^ RT0[ (uint8) ( Y1 >> 24 ) ] ^ \ RT1[ (uint8) ( Y0 >> 16 ) ] ^ \ RT2[ (uint8) ( Y3 >> 8 ) ] ^ \ RT3[ (uint8) ( Y2 ) ]; \ \ X2 = RK[2] ^ RT0[ (uint8) ( Y2 >> 24 ) ] ^ \ RT1[ (uint8) ( Y1 >> 16 ) ] ^ \ RT2[ (uint8) ( Y0 >> 8 ) ] ^ \ RT3[ (uint8) ( Y3 ) ]; \ \ X3 = RK[3] ^ RT0[ (uint8) ( Y3 >> 24 ) ] ^ \ RT1[ (uint8) ( Y2 >> 16 ) ] ^ \ RT2[ (uint8) ( Y1 >> 8 ) ] ^ \ RT3[ (uint8) ( Y0 ) ]; \} AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 1 */ AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 2 */ AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 3 */ AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 4 */ AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 5 */ AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 6 */ AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 7 */ AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 8 */ AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 9 */ if( ctx->nr > 10 ) { AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 10 */ AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 11 */ } if( ctx->nr > 12 ) { AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 ); /* round 12 */ AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 ); /* round 13 */ } /* last round */ RK += 4; X0 = RK[0] ^ ( RSb[ (uint8) ( Y0 >> 24 ) ] << 24 ) ^ ( RSb[ (uint8) ( Y3 >> 16 ) ] << 16 ) ^ ( RSb[ (uint8) ( Y2 >> 8 ) ] << 8 ) ^ ( RSb[ (uint8) ( Y1 ) ] ); X1 = RK[1] ^ ( RSb[ (uint8) ( Y1 >> 24 ) ] << 24 ) ^ ( RSb[ (uint8) ( Y0 >> 16 ) ] << 16 ) ^ ( RSb[ (uint8) ( Y3 >> 8 ) ] << 8 ) ^ ( RSb[ (uint8) ( Y2 ) ] ); X2 = RK[2] ^ ( RSb[ (uint8) ( Y2 >> 24 ) ] << 24 ) ^ ( RSb[ (uint8) ( Y1 >> 16 ) ] << 16 ) ^ ( RSb[ (uint8) ( Y0 >> 8 ) ] << 8 ) ^ ( RSb[ (uint8) ( Y3 ) ] ); X3 = RK[3] ^ ( RSb[ (uint8) ( Y3 >> 24 ) ] << 24 ) ^ ( RSb[ (uint8) ( Y2 >> 16 ) ] << 16 ) ^ ( RSb[ (uint8) ( Y1 >> 8 ) ] << 8 ) ^ ( RSb[ (uint8) ( Y0 ) ] ); PUT_UINT32( X0, output, 0 ); PUT_UINT32( X1, output, 4 ); PUT_UINT32( X2, output, 8 ); PUT_UINT32( X3, output, 12 );}void hmac_sha1(unsigned char *text, int text_len, unsigned char *key, int key_len, unsigned char *digest){ SHA_CTX context; unsigned char k_ipad[65]; /* inner padding - key XORd with ipad */ unsigned char k_opad[65]; /* outer padding - key XORd with opad */ int i; /* if key is longer than 64 bytes reset it to key=SHA1(key) */ if (key_len > 64) { SHA_CTX tctx; SHAInit(&tctx); SHAUpdate(&tctx, key, key_len); SHAFinal(&tctx, key); key_len = 20; } /* * the HMAC_SHA1 transform looks like: * * SHA1(K XOR opad, SHA1(K XOR ipad, text)) * * where K is an n byte key * ipad is the byte 0x36 repeated 64 times * opad is the byte 0x5c repeated 64 times * and text is the data being protected */ /* start out by storing key in pads */ memset(k_ipad, 0, sizeof k_ipad); memset(k_opad, 0, sizeof k_opad); memcpy(k_ipad, key, key_len); memcpy(k_opad, key, key_len); /* XOR key with ipad and opad values */ for (i = 0; i < 64; i++) { k_ipad[i] ^= 0x36; k_opad[i] ^= 0x5c; } /* perform inner SHA1*/ SHAInit(&context); /* init context for 1st pass */ SHAUpdate(&context, k_ipad, 64); /* start with inner pad */ SHAUpdate(&context, text, text_len); /* then text of datagram */ SHAFinal(&context, digest); /* finish up 1st pass */ /* perform outer SHA1 */ SHAInit(&context); /* init context for 2nd pass */ SHAUpdate(&context, k_opad, 64); /* start with outer pad */ SHAUpdate(&context, digest, 20); /* then results of 1st hash */ SHAFinal(&context, digest); /* finish up 2nd pass */}/** F(P, S, c, i) = U1 xor U2 xor ... Uc* U1 = PRF(P, S || Int(i))* U2 = PRF(P, U1)* Uc = PRF(P, Uc-1)*/void F(char *password, unsigned char *ssid, int ssidlength, int iterations, int count, unsigned char *output){ unsigned char digest[36], digest1[SHA_DIGEST_LEN]; int i, j; /* U1 = PRF(P, S || int(i)) */ memcpy(digest, ssid, ssidlength); digest[ssidlength] = (unsigned char)((count>>24) & 0xff); digest[ssidlength+1] = (unsigned char)((count>>16) & 0xff); digest[ssidlength+2] = (unsigned char)((count>>8) & 0xff); digest[ssidlength+3] = (unsigned char)(count & 0xff); hmac_sha1(digest, ssidlength+4, (unsigned char*) password, (int) strlen(password), digest1); // for WPA update /* output = U1 */ memcpy(output, digest1, SHA_DIGEST_LEN); for (i = 1; i < iterations; i++) { /* Un = PRF(P, Un-1) */ hmac_sha1(digest1, SHA_DIGEST_LEN, (unsigned char*) password, (int) strlen(password), digest); // for WPA update memcpy(digest1, digest, SHA_DIGEST_LEN); /* output = output xor Un */ for (j = 0; j < SHA_DIGEST_LEN; j++) { output[j] ^= digest[j]; } }}/** password - ascii string up to 63 characters in length* ssid - octet string up to 32 octets* ssidlength - length of ssid in octets* output must be 40 octets in length and outputs 256 bits of key*/int PasswordHash(char *password, unsigned char *ssid, int ssidlength, unsigned char *output){ if ((strlen(password) > 63) || (ssidlength > 32)) return 0; F(password, ssid, ssidlength, 4096, 1, output); F(password, ssid, ssidlength, 4096, 2, &output[SHA_DIGEST_LEN]); return 1;}?? 快捷鍵說明
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