2 chacha-merged.c version 20080118
20 #define U8V(v) ((u8)(v) & U8C(0xFF))
21 #define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF))
24   (U32V((v) << (n)) | ((v) >> (32 - (n))))
27   (((u32)((p)[0])      ) | \
34     (p)[0] = U8V((v)      ); \
38   } while (0)
51 static const char sigma[16] = "expand 32-byte k";
52 static const char tau[16] = "expand 16-byte k";
59   x->input[4] = U8TO32_LITTLE(k + 0);  in chacha_keysetup()
60   x->input[5] = U8TO32_LITTLE(k + 4);  in chacha_keysetup()
61   x->input[6] = U8TO32_LITTLE(k + 8);  in chacha_keysetup()
62   x->input[7] = U8TO32_LITTLE(k + 12);  in chacha_keysetup()
69   x->input[8] = U8TO32_LITTLE(k + 0);  in chacha_keysetup()
70   x->input[9] = U8TO32_LITTLE(k + 4);  in chacha_keysetup()
71   x->input[10] = U8TO32_LITTLE(k + 8);  in chacha_keysetup()
72   x->input[11] = U8TO32_LITTLE(k + 12);  in chacha_keysetup()
73   x->input[0] = U8TO32_LITTLE(constants + 0);  in chacha_keysetup()
74   x->input[1] = U8TO32_LITTLE(constants + 4);  in chacha_keysetup()
75   x->input[2] = U8TO32_LITTLE(constants + 8);  in chacha_keysetup()
76   x->input[3] = U8TO32_LITTLE(constants + 12);  in chacha_keysetup()
82   x->input[12] = 0;  in chacha_ivsetup()
83   x->input[13] = 0;  in chacha_ivsetup()
84   x->input[14] = U8TO32_LITTLE(iv + 0);  in chacha_ivsetup()
85   x->input[15] = U8TO32_LITTLE(iv + 4);  in chacha_ivsetup()
91   u32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15;  in chacha_encrypt_bytes()  local
99   j0 = x->input[0];  in chacha_encrypt_bytes()
100   j1 = x->input[1];  in chacha_encrypt_bytes()
101   j2 = x->input[2];  in chacha_encrypt_bytes()
102   j3 = x->input[3];  in chacha_encrypt_bytes()
103   j4 = x->input[4];  in chacha_encrypt_bytes()
104   j5 = x->input[5];  in chacha_encrypt_bytes()
105   j6 = x->input[6];  in chacha_encrypt_bytes()
106   j7 = x->input[7];  in chacha_encrypt_bytes()
107   j8 = x->input[8];  in chacha_encrypt_bytes()
108   j9 = x->input[9];  in chacha_encrypt_bytes()
109   j10 = x->input[10];  in chacha_encrypt_bytes()
110   j11 = x->input[11];  in chacha_encrypt_bytes()
111   j12 = x->input[12];  in chacha_encrypt_bytes()
112   j13 = x->input[13];  in chacha_encrypt_bytes()
113   j14 = x->input[14];  in chacha_encrypt_bytes()
114   j15 = x->input[15];  in chacha_encrypt_bytes()
118       for (i = 0;i < bytes;++i) tmp[i] = m[i];  in chacha_encrypt_bytes()
133     x10 = j10;  in chacha_encrypt_bytes()
137     x14 = j14;  in chacha_encrypt_bytes()
139     for (i = 20;i > 0;i -= 2) {  in chacha_encrypt_bytes()
142       QUARTERROUND( x2, x6,x10,x14)  in chacha_encrypt_bytes()
144       QUARTERROUND( x0, x5,x10,x15)  in chacha_encrypt_bytes()
147       QUARTERROUND( x3, x4, x9,x14)  in chacha_encrypt_bytes()
159     x10 = PLUS(x10,j10);  in chacha_encrypt_bytes()
163     x14 = PLUS(x14,j14);  in chacha_encrypt_bytes()
167     x0 = XOR(x0,U8TO32_LITTLE(m + 0));  in chacha_encrypt_bytes()
177     x10 = XOR(x10,U8TO32_LITTLE(m + 40));  in chacha_encrypt_bytes()
181     x14 = XOR(x14,U8TO32_LITTLE(m + 56));  in chacha_encrypt_bytes()
191     U32TO8_LITTLE(c + 0,x0);  in chacha_encrypt_bytes()
201     U32TO8_LITTLE(c + 40,x10);  in chacha_encrypt_bytes()
205     U32TO8_LITTLE(c + 56,x14);  in chacha_encrypt_bytes()
210         for (i = 0;i < bytes;++i) ctarget[i] = c[i];  in chacha_encrypt_bytes()
212       x->input[12] = j12;  in chacha_encrypt_bytes()
213       x->input[13] = j13;  in chacha_encrypt_bytes()
216     bytes -= 64;  in chacha_encrypt_bytes()