34 for (i = 0; i < 4; i++)
48 uint32_t
delta = 0x9E3779B9, sum = delta * 32;
50 for (i = 0; i < 32; i++) {
51 v1 -= (((v0 << 4) ^ (v0 >> 5)) +
v0) ^ (sum + ctx->
key[(sum >> 11) & 3]);
53 v0 -= (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + ctx->
key[sum & 3]);
61 uint32_t sum = 0,
delta = 0x9E3779B9;
63 for (i = 0; i < 32; i++) {
64 v0 += (((v1 << 4) ^ (v1 >> 5)) + v1) ^ (sum + ctx->
key[sum & 3]);
66 v1 += (((v0 << 4) ^ (v0 >> 5)) +
v0) ^ (sum + ctx->
key[(sum >> 11) & 3]);
89 for (i = 0; i < 8; i++)
90 dst[i] = src[i] ^ iv[i];
105 #define XTEA_NUM_TESTS 6
107 static const uint8_t xtea_test_key[XTEA_NUM_TESTS][16] = {
108 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
109 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
110 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
111 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
112 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
113 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f },
114 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
115 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
116 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
117 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
118 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
119 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }
122 static const uint8_t xtea_test_pt[XTEA_NUM_TESTS][8] = {
123 { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
124 { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
125 { 0x5a, 0x5b, 0x6e, 0x27, 0x89, 0x48, 0xd7, 0x7f },
126 { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48 },
127 { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
128 { 0x70, 0xe1, 0x22, 0x5d, 0x6e, 0x4e, 0x76, 0x55 }
131 static const uint8_t xtea_test_ct[XTEA_NUM_TESTS][8] = {
132 { 0x49, 0x7d, 0xf3, 0xd0, 0x72, 0x61, 0x2c, 0xb5 },
133 { 0xe7, 0x8f, 0x2d, 0x13, 0x74, 0x43, 0x41, 0xd8 },
134 { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 },
135 { 0xa0, 0x39, 0x05, 0x89, 0xf8, 0xb8, 0xef, 0xa5 },
136 { 0xed, 0x23, 0x37, 0x5a, 0x82, 0x1a, 0x8c, 0x2d },
137 { 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41 }
145 if (memcmp(dst, ref, 8*len)) {
147 printf(
"%s failed\ngot ", test);
148 for (i = 0; i < 8*
len; i++)
149 printf(
"%02x ", dst[i]);
150 printf(
"\nexpected ");
151 for (i = 0; i < 8*
len; i++)
152 printf(
"%02x ", ref[i]);
163 const uint8_t src[32] =
"HelloWorldHelloWorldHelloWorld";
167 for (i = 0; i < XTEA_NUM_TESTS; i++) {
170 test_xtea(&ctx, buf, xtea_test_pt[i], xtea_test_ct[i], 1,
NULL, 0,
"encryption");
171 test_xtea(&ctx, buf, xtea_test_ct[i], xtea_test_pt[i], 1,
NULL, 1,
"decryption");
174 memcpy(iv,
"HALLO123", 8);
178 memcpy(iv,
"HALLO123", 8);
179 test_xtea(&ctx, pl, ct, src, 4, iv, 1,
"CBC decryption");
181 memcpy(iv,
"HALLO123", 8);
182 test_xtea(&ctx, ct, ct, src, 4, iv, 1,
"CBC inplace decryption");
184 printf(
"Test encryption/decryption success.\n");