1 #define TEST_NAME "core_ristretto255"
2 #include "cmptest.h"
3
4 static void
tv1(void)5 tv1(void)
6 {
7 static const char *bad_encodings_hex[] = {
8 /* Non-canonical field encodings */
9 "00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
10 "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
11 "f3ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
12 "edffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
13
14 /* Negative field elements */
15 "0100000000000000000000000000000000000000000000000000000000000000",
16 "01ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
17 "ed57ffd8c914fb201471d1c3d245ce3c746fcbe63a3679d51b6a516ebebe0e20",
18 "c34c4e1826e5d403b78e246e88aa051c36ccf0aafebffe137d148a2bf9104562",
19 "c940e5a4404157cfb1628b108db051a8d439e1a421394ec4ebccb9ec92a8ac78",
20 "47cfc5497c53dc8e61c91d17fd626ffb1c49e2bca94eed052281b510b1117a24",
21 "f1c6165d33367351b0da8f6e4511010c68174a03b6581212c71c0e1d026c3c72",
22 "87260f7a2f12495118360f02c26a470f450dadf34a413d21042b43b9d93e1309",
23
24 /* Non-square x^2 */
25 "26948d35ca62e643e26a83177332e6b6afeb9d08e4268b650f1f5bbd8d81d371",
26 "4eac077a713c57b4f4397629a4145982c661f48044dd3f96427d40b147d9742f",
27 "de6a7b00deadc788eb6b6c8d20c0ae96c2f2019078fa604fee5b87d6e989ad7b",
28 "bcab477be20861e01e4a0e295284146a510150d9817763caf1a6f4b422d67042",
29 "2a292df7e32cababbd9de088d1d1abec9fc0440f637ed2fba145094dc14bea08",
30 "f4a9e534fc0d216c44b218fa0c42d99635a0127ee2e53c712f70609649fdff22",
31 "8268436f8c4126196cf64b3c7ddbda90746a378625f9813dd9b8457077256731",
32 "2810e5cbc2cc4d4eece54f61c6f69758e289aa7ab440b3cbeaa21995c2f4232b",
33
34 /* Negative xy value */
35 "3eb858e78f5a7254d8c9731174a94f76755fd3941c0ac93735c07ba14579630e",
36 "a45fdc55c76448c049a1ab33f17023edfb2be3581e9c7aade8a6125215e04220",
37 "d483fe813c6ba647ebbfd3ec41adca1c6130c2beeee9d9bf065c8d151c5f396e",
38 "8a2e1d30050198c65a54483123960ccc38aef6848e1ec8f5f780e8523769ba32",
39 "32888462f8b486c68ad7dd9610be5192bbeaf3b443951ac1a8118419d9fa097b",
40 "227142501b9d4355ccba290404bde41575b037693cef1f438c47f8fbf35d1165",
41 "5c37cc491da847cfeb9281d407efc41e15144c876e0170b499a96a22ed31e01e",
42 "445425117cb8c90edcbc7c1cc0e74f747f2c1efa5630a967c64f287792a48a4b",
43
44 /* s = -1, which causes y = 0 */
45 "ecffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f"
46 };
47 unsigned char *s;
48 size_t i;
49
50 s = (unsigned char *) sodium_malloc(crypto_core_ristretto255_BYTES);
51 for (i = 0; i < sizeof bad_encodings_hex / sizeof bad_encodings_hex[0]; i++) {
52 sodium_hex2bin(s, crypto_core_ristretto255_BYTES, bad_encodings_hex[i],
53 crypto_core_ristretto255_BYTES * 2 + 1,
54 NULL, NULL, NULL);
55 if (crypto_core_ristretto255_is_valid_point(s)) {
56 printf("[%s] was not rejected\n", bad_encodings_hex[i]);
57 }
58 }
59 sodium_free(s);
60 };
61
62 static void
tv2(void)63 tv2(void)
64 {
65 static const char *hash_hex[] = {
66 "5d1be09e3d0c82fc538112490e35701979d99e06ca3e2b5b54bffe8b4dc772c1"
67 "4d98b696a1bbfb5ca32c436cc61c16563790306c79eaca7705668b47dffe5bb6",
68
69 "f116b34b8f17ceb56e8732a60d913dd10cce47a6d53bee9204be8b44f6678b27"
70 "0102a56902e2488c46120e9276cfe54638286b9e4b3cdb470b542d46c2068d38",
71
72 "8422e1bbdaab52938b81fd602effb6f89110e1e57208ad12d9ad767e2e25510c"
73 "27140775f9337088b982d83d7fcf0b2fa1edffe51952cbe7365e95c86eaf325c",
74
75 "ac22415129b61427bf464e17baee8db65940c233b98afce8d17c57beeb7876c2"
76 "150d15af1cb1fb824bbd14955f2b57d08d388aab431a391cfc33d5bafb5dbbaf",
77
78 "165d697a1ef3d5cf3c38565beefcf88c0f282b8e7dbd28544c483432f1cec767"
79 "5debea8ebb4e5fe7d6f6e5db15f15587ac4d4d4a1de7191e0c1ca6664abcc413",
80
81 "a836e6c9a9ca9f1e8d486273ad56a78c70cf18f0ce10abb1c7172ddd605d7fd2"
82 "979854f47ae1ccf204a33102095b4200e5befc0465accc263175485f0e17ea5c",
83
84 "2cdc11eaeb95daf01189417cdddbf95952993aa9cb9c640eb5058d09702c7462"
85 "2c9965a697a3b345ec24ee56335b556e677b30e6f90ac77d781064f866a3c982"
86 };
87 unsigned char *s;
88 unsigned char *u;
89 char *hex;
90 size_t i;
91
92 s = (unsigned char *) sodium_malloc(crypto_core_ristretto255_BYTES);
93 u = (unsigned char *) sodium_malloc(crypto_core_ristretto255_HASHBYTES);
94 hex = (char *) sodium_malloc(crypto_core_ristretto255_BYTES * 2 + 1);
95 for (i = 0; i < sizeof hash_hex / sizeof hash_hex[0]; i++) {
96 sodium_hex2bin(u, crypto_core_ristretto255_HASHBYTES, hash_hex[i],
97 crypto_core_ristretto255_HASHBYTES * 2 + 1,
98 NULL, NULL, NULL);
99 crypto_core_ristretto255_from_hash(s, u);
100 sodium_bin2hex(hex, crypto_core_ristretto255_BYTES * 2 + 1,
101 s, crypto_core_ristretto255_BYTES);
102 printf("%s\n", hex);
103 }
104 sodium_free(hex);
105 sodium_free(u);
106 sodium_free(s);
107 }
108
109 static void
tv3(void)110 tv3(void)
111 {
112 static const unsigned char l[crypto_core_ed25519_BYTES] =
113 { 0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,
114 0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14,
115 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
116 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10 };
117
118 unsigned char *r =
119 (unsigned char *) sodium_malloc(crypto_core_ristretto255_SCALARBYTES);
120 unsigned char *r_inv =
121 (unsigned char *) sodium_malloc(crypto_core_ristretto255_SCALARBYTES);
122 unsigned char *ru =
123 (unsigned char *) sodium_malloc(crypto_core_ristretto255_HASHBYTES);
124 unsigned char *s =
125 (unsigned char *) sodium_malloc(crypto_core_ristretto255_BYTES);
126 unsigned char *s_ =
127 (unsigned char *) sodium_malloc(crypto_core_ristretto255_BYTES);
128 unsigned char *s2 =
129 (unsigned char *) sodium_malloc(crypto_core_ristretto255_BYTES);
130 int i;
131
132 for (i = 0; i < 1000; i++) {
133 crypto_core_ristretto255_scalar_random(r);
134 if (crypto_scalarmult_ristretto255_base(s, r) != 0 ||
135 crypto_core_ristretto255_is_valid_point(s) != 1) {
136 printf("crypto_scalarmult_ristretto255_base() failed\n");
137 }
138 crypto_core_ristretto255_random(s);
139 if (crypto_core_ristretto255_is_valid_point(s) != 1) {
140 printf("crypto_core_ristretto255_random() failed\n");
141 }
142 if (crypto_scalarmult_ristretto255(s, l, s) == 0) {
143 printf("s*l != inf (1)\n");
144 }
145 randombytes_buf(ru, crypto_core_ristretto255_HASHBYTES);
146 if (crypto_core_ristretto255_from_hash(s, ru) != 0 ||
147 crypto_core_ristretto255_is_valid_point(s) != 1) {
148 printf("crypto_core_ristretto255_from_hash() failed\n");
149 }
150 if (crypto_scalarmult_ristretto255(s2, l, s) == 0) {
151 printf("s*l != inf (2)\n");
152 }
153 if (crypto_scalarmult_ristretto255(s2, r, s) != 0 ||
154 crypto_core_ristretto255_is_valid_point(s2) != 1) {
155 printf("crypto_scalarmult_ristretto255() failed\n");
156 }
157 if (crypto_core_ristretto255_scalar_invert(r_inv, r) != 0) {
158 printf("crypto_core_ristretto255_scalar_invert() failed\n");
159 }
160 if (crypto_scalarmult_ristretto255(s_, r_inv, s2) != 0 ||
161 crypto_core_ristretto255_is_valid_point(s_) != 1) {
162 printf("crypto_scalarmult_ristretto255() failed\n");
163 }
164 if (memcmp(s, s_, crypto_core_ristretto255_BYTES) != 0) {
165 printf("inversion failed\n");
166 }
167 if (crypto_scalarmult_ristretto255(s2, l, s2) == 0) {
168 printf("s*l != inf (3)\n");
169 }
170 if (crypto_core_ristretto255_add(s2, s, s_) != 0) {
171 printf("addition failed");
172 }
173 if (crypto_core_ristretto255_sub(s2, s2, s_) != 0) {
174 printf("substraction failed");
175 }
176 if (crypto_core_ristretto255_is_valid_point(s2) == 0) {
177 printf("invalid point");
178 }
179 if (memcmp(s, s2, crypto_core_ristretto255_BYTES) != 0) {
180 printf("s2 + s - s_ != s\n");
181 }
182 if (crypto_core_ristretto255_sub(s2, s2, s) != 0) {
183 printf("substraction failed");
184 }
185 if (crypto_core_ristretto255_is_valid_point(s2) == -1) {
186 printf("s + s' - s - s' != 0");
187 }
188 }
189
190 crypto_core_ristretto255_random(s);
191 memset(s_, 0xfe, crypto_core_ristretto255_BYTES);
192 assert(crypto_core_ristretto255_add(s2, s_, s) == -1);
193 assert(crypto_core_ristretto255_add(s2, s, s_) == -1);
194 assert(crypto_core_ristretto255_add(s2, s_, s_) == -1);
195 assert(crypto_core_ristretto255_add(s2, s, s) == 0);
196 assert(crypto_core_ristretto255_sub(s2, s_, s) == -1);
197 assert(crypto_core_ristretto255_sub(s2, s, s_) == -1);
198 assert(crypto_core_ristretto255_sub(s2, s_, s_) == -1);
199 assert(crypto_core_ristretto255_sub(s2, s, s) == 0);
200
201 sodium_free(s2);
202 sodium_free(s_);
203 sodium_free(s);
204 sodium_free(ru);
205 sodium_free(r_inv);
206 sodium_free(r);
207 }
208
209 static void
tv4(void)210 tv4(void)
211 {
212 unsigned char *r;
213 unsigned char *s1;
214 unsigned char *s2;
215 unsigned char *s3;
216 unsigned char *s4;
217
218 r = (unsigned char *) sodium_malloc(crypto_core_ristretto255_NONREDUCEDSCALARBYTES);
219 s1 = (unsigned char *) sodium_malloc(crypto_core_ristretto255_SCALARBYTES);
220 s2 = (unsigned char *) sodium_malloc(crypto_core_ristretto255_SCALARBYTES);
221 s3 = (unsigned char *) sodium_malloc(crypto_core_ristretto255_SCALARBYTES);
222 s4 = (unsigned char *) sodium_malloc(crypto_core_ristretto255_SCALARBYTES);
223
224 crypto_core_ristretto255_scalar_random(s1);
225 randombytes_buf(r, crypto_core_ristretto255_NONREDUCEDSCALARBYTES);
226 crypto_core_ristretto255_scalar_reduce(s2, r);
227 memcpy(s4, s1, crypto_core_ristretto255_SCALARBYTES);
228 crypto_core_ristretto255_scalar_add(s3, s1, s2);
229 crypto_core_ristretto255_scalar_sub(s4, s1, s2);
230 crypto_core_ristretto255_scalar_add(s2, s3, s4);
231 crypto_core_ristretto255_scalar_sub(s2, s2, s1);
232 crypto_core_ristretto255_scalar_mul(s2, s3, s2);
233 crypto_core_ristretto255_scalar_invert(s4, s3);
234 crypto_core_ristretto255_scalar_mul(s2, s2, s4);
235 crypto_core_ristretto255_scalar_negate(s1, s1);
236 crypto_core_ristretto255_scalar_add(s2, s2, s1);
237 crypto_core_ristretto255_scalar_complement(s1, s2);
238 s1[0]--;
239 assert(sodium_is_zero(s1, crypto_core_ristretto255_SCALARBYTES));
240
241 sodium_free(s1);
242 sodium_free(s2);
243 sodium_free(s3);
244 sodium_free(s4);
245 sodium_free(r);
246 }
247
248 int
main(void)249 main(void)
250 {
251 tv1();
252 tv2();
253 tv3();
254 tv4();
255
256 assert(crypto_core_ristretto255_BYTES == crypto_core_ristretto255_bytes());
257 assert(crypto_core_ristretto255_SCALARBYTES == crypto_core_ristretto255_scalarbytes());
258 assert(crypto_core_ristretto255_NONREDUCEDSCALARBYTES == crypto_core_ristretto255_nonreducedscalarbytes());
259 assert(crypto_core_ristretto255_NONREDUCEDSCALARBYTES >= crypto_core_ristretto255_SCALARBYTES);
260 assert(crypto_core_ristretto255_HASHBYTES == crypto_core_ristretto255_hashbytes());
261 assert(crypto_core_ristretto255_HASHBYTES >= crypto_core_ristretto255_BYTES);
262 assert(crypto_core_ristretto255_BYTES == crypto_core_ed25519_BYTES);
263 assert(crypto_core_ristretto255_SCALARBYTES == crypto_core_ed25519_SCALARBYTES);
264 assert(crypto_core_ristretto255_NONREDUCEDSCALARBYTES == crypto_core_ed25519_NONREDUCEDSCALARBYTES);
265 assert(crypto_core_ristretto255_HASHBYTES >= 2 * crypto_core_ed25519_UNIFORMBYTES);
266
267 printf("OK\n");
268
269 return 0;
270 }
271