1 /* 2 * Copyright 2011-2017 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include <openssl/opensslconf.h> 11 # include "testutil.h" 12 13 #ifdef OPENSSL_NO_SRP 14 # include <stdio.h> 15 #else 16 17 # include <openssl/srp.h> 18 # include <openssl/rand.h> 19 # include <openssl/err.h> 20 21 # define RANDOM_SIZE 32 /* use 256 bits on each side */ 22 23 static int run_srp(const char *username, const char *client_pass, 24 const char *server_pass) 25 { 26 int ret = 0; 27 BIGNUM *s = NULL; 28 BIGNUM *v = NULL; 29 BIGNUM *a = NULL; 30 BIGNUM *b = NULL; 31 BIGNUM *u = NULL; 32 BIGNUM *x = NULL; 33 BIGNUM *Apub = NULL; 34 BIGNUM *Bpub = NULL; 35 BIGNUM *Kclient = NULL; 36 BIGNUM *Kserver = NULL; 37 unsigned char rand_tmp[RANDOM_SIZE]; 38 /* use builtin 1024-bit params */ 39 const SRP_gN *GN; 40 41 if (!TEST_ptr(GN = SRP_get_default_gN("1024"))) 42 return 0; 43 44 /* Set up server's password entry */ 45 if (!TEST_true(SRP_create_verifier_BN(username, server_pass, 46 &s, &v, GN->N, GN->g))) 47 goto end; 48 49 test_output_bignum("N", GN->N); 50 test_output_bignum("g", GN->g); 51 test_output_bignum("Salt", s); 52 test_output_bignum("Verifier", v); 53 54 /* Server random */ 55 RAND_bytes(rand_tmp, sizeof(rand_tmp)); 56 b = BN_bin2bn(rand_tmp, sizeof(rand_tmp), NULL); 57 if (!TEST_BN_ne_zero(b)) 58 goto end; 59 test_output_bignum("b", b); 60 61 /* Server's first message */ 62 Bpub = SRP_Calc_B(b, GN->N, GN->g, v); 63 test_output_bignum("B", Bpub); 64 65 if (!TEST_true(SRP_Verify_B_mod_N(Bpub, GN->N))) 66 goto end; 67 68 /* Client random */ 69 RAND_bytes(rand_tmp, sizeof(rand_tmp)); 70 a = BN_bin2bn(rand_tmp, sizeof(rand_tmp), NULL); 71 if (!TEST_BN_ne_zero(a)) 72 goto end; 73 test_output_bignum("a", a); 74 75 /* Client's response */ 76 Apub = SRP_Calc_A(a, GN->N, GN->g); 77 test_output_bignum("A", Apub); 78 79 if (!TEST_true(SRP_Verify_A_mod_N(Apub, GN->N))) 80 goto end; 81 82 /* Both sides calculate u */ 83 u = SRP_Calc_u(Apub, Bpub, GN->N); 84 85 /* Client's key */ 86 x = SRP_Calc_x(s, username, client_pass); 87 Kclient = SRP_Calc_client_key(GN->N, Bpub, GN->g, x, a, u); 88 test_output_bignum("Client's key", Kclient); 89 90 /* Server's key */ 91 Kserver = SRP_Calc_server_key(Apub, v, u, b, GN->N); 92 test_output_bignum("Server's key", Kserver); 93 94 if (!TEST_BN_eq(Kclient, Kserver)) 95 goto end; 96 97 ret = 1; 98 99 end: 100 BN_clear_free(Kclient); 101 BN_clear_free(Kserver); 102 BN_clear_free(x); 103 BN_free(u); 104 BN_free(Apub); 105 BN_clear_free(a); 106 BN_free(Bpub); 107 BN_clear_free(b); 108 BN_free(s); 109 BN_clear_free(v); 110 111 return ret; 112 } 113 114 static int check_bn(const char *name, const BIGNUM *bn, const char *hexbn) 115 { 116 BIGNUM *tmp = NULL; 117 int r; 118 119 if (!TEST_true(BN_hex2bn(&tmp, hexbn))) 120 return 0; 121 122 if (BN_cmp(bn, tmp) != 0) 123 TEST_error("unexpected %s value", name); 124 r = TEST_BN_eq(bn, tmp); 125 BN_free(tmp); 126 return r; 127 } 128 129 /* SRP test vectors from RFC5054 */ 130 static int run_srp_kat(void) 131 { 132 int ret = 0; 133 BIGNUM *s = NULL; 134 BIGNUM *v = NULL; 135 BIGNUM *a = NULL; 136 BIGNUM *b = NULL; 137 BIGNUM *u = NULL; 138 BIGNUM *x = NULL; 139 BIGNUM *Apub = NULL; 140 BIGNUM *Bpub = NULL; 141 BIGNUM *Kclient = NULL; 142 BIGNUM *Kserver = NULL; 143 /* use builtin 1024-bit params */ 144 const SRP_gN *GN; 145 146 if (!TEST_ptr(GN = SRP_get_default_gN("1024"))) 147 goto err; 148 BN_hex2bn(&s, "BEB25379D1A8581EB5A727673A2441EE"); 149 /* Set up server's password entry */ 150 if (!TEST_true(SRP_create_verifier_BN("alice", "password123", &s, &v, GN->N, 151 GN->g))) 152 goto err; 153 154 TEST_info("checking v"); 155 if (!TEST_true(check_bn("v", v, 156 "7E273DE8696FFC4F4E337D05B4B375BEB0DDE1569E8FA00A9886D812" 157 "9BADA1F1822223CA1A605B530E379BA4729FDC59F105B4787E5186F5" 158 "C671085A1447B52A48CF1970B4FB6F8400BBF4CEBFBB168152E08AB5" 159 "EA53D15C1AFF87B2B9DA6E04E058AD51CC72BFC9033B564E26480D78" 160 "E955A5E29E7AB245DB2BE315E2099AFB"))) 161 goto err; 162 TEST_note(" okay"); 163 164 /* Server random */ 165 BN_hex2bn(&b, "E487CB59D31AC550471E81F00F6928E01DDA08E974A004F49E61F5D1" 166 "05284D20"); 167 168 /* Server's first message */ 169 Bpub = SRP_Calc_B(b, GN->N, GN->g, v); 170 if (!TEST_true(SRP_Verify_B_mod_N(Bpub, GN->N))) 171 goto err; 172 173 TEST_info("checking B"); 174 if (!TEST_true(check_bn("B", Bpub, 175 "BD0C61512C692C0CB6D041FA01BB152D4916A1E77AF46AE105393011" 176 "BAF38964DC46A0670DD125B95A981652236F99D9B681CBF87837EC99" 177 "6C6DA04453728610D0C6DDB58B318885D7D82C7F8DEB75CE7BD4FBAA" 178 "37089E6F9C6059F388838E7A00030B331EB76840910440B1B27AAEAE" 179 "EB4012B7D7665238A8E3FB004B117B58"))) 180 goto err; 181 TEST_note(" okay"); 182 183 /* Client random */ 184 BN_hex2bn(&a, "60975527035CF2AD1989806F0407210BC81EDC04E2762A56AFD529DD" 185 "DA2D4393"); 186 187 /* Client's response */ 188 Apub = SRP_Calc_A(a, GN->N, GN->g); 189 if (!TEST_true(SRP_Verify_A_mod_N(Apub, GN->N))) 190 goto err; 191 192 TEST_info("checking A"); 193 if (!TEST_true(check_bn("A", Apub, 194 "61D5E490F6F1B79547B0704C436F523DD0E560F0C64115BB72557EC4" 195 "4352E8903211C04692272D8B2D1A5358A2CF1B6E0BFCF99F921530EC" 196 "8E39356179EAE45E42BA92AEACED825171E1E8B9AF6D9C03E1327F44" 197 "BE087EF06530E69F66615261EEF54073CA11CF5858F0EDFDFE15EFEA" 198 "B349EF5D76988A3672FAC47B0769447B"))) 199 goto err; 200 TEST_note(" okay"); 201 202 /* Both sides calculate u */ 203 u = SRP_Calc_u(Apub, Bpub, GN->N); 204 205 if (!TEST_true(check_bn("u", u, 206 "CE38B9593487DA98554ED47D70A7AE5F462EF019"))) 207 goto err; 208 209 /* Client's key */ 210 x = SRP_Calc_x(s, "alice", "password123"); 211 Kclient = SRP_Calc_client_key(GN->N, Bpub, GN->g, x, a, u); 212 TEST_info("checking client's key"); 213 if (!TEST_true(check_bn("Client's key", Kclient, 214 "B0DC82BABCF30674AE450C0287745E7990A3381F63B387AAF271A10D" 215 "233861E359B48220F7C4693C9AE12B0A6F67809F0876E2D013800D6C" 216 "41BB59B6D5979B5C00A172B4A2A5903A0BDCAF8A709585EB2AFAFA8F" 217 "3499B200210DCC1F10EB33943CD67FC88A2F39A4BE5BEC4EC0A3212D" 218 "C346D7E474B29EDE8A469FFECA686E5A"))) 219 goto err; 220 TEST_note(" okay"); 221 222 /* Server's key */ 223 Kserver = SRP_Calc_server_key(Apub, v, u, b, GN->N); 224 TEST_info("checking server's key"); 225 if (!TEST_true(check_bn("Server's key", Kserver, 226 "B0DC82BABCF30674AE450C0287745E7990A3381F63B387AAF271A10D" 227 "233861E359B48220F7C4693C9AE12B0A6F67809F0876E2D013800D6C" 228 "41BB59B6D5979B5C00A172B4A2A5903A0BDCAF8A709585EB2AFAFA8F" 229 "3499B200210DCC1F10EB33943CD67FC88A2F39A4BE5BEC4EC0A3212D" 230 "C346D7E474B29EDE8A469FFECA686E5A"))) 231 goto err; 232 TEST_note(" okay"); 233 234 ret = 1; 235 236 err: 237 BN_clear_free(Kclient); 238 BN_clear_free(Kserver); 239 BN_clear_free(x); 240 BN_free(u); 241 BN_free(Apub); 242 BN_clear_free(a); 243 BN_free(Bpub); 244 BN_clear_free(b); 245 BN_free(s); 246 BN_clear_free(v); 247 248 return ret; 249 } 250 251 static int run_srp_tests(void) 252 { 253 /* "Negative" test, expect a mismatch */ 254 TEST_info("run_srp: expecting a mismatch"); 255 if (!TEST_false(run_srp("alice", "password1", "password2"))) 256 return 0; 257 258 /* "Positive" test, should pass */ 259 TEST_info("run_srp: expecting a match"); 260 if (!TEST_true(run_srp("alice", "password", "password"))) 261 return 0; 262 263 return 1; 264 } 265 #endif 266 267 int setup_tests(void) 268 { 269 #ifdef OPENSSL_NO_SRP 270 printf("No SRP support\n"); 271 #else 272 ADD_TEST(run_srp_tests); 273 ADD_TEST(run_srp_kat); 274 #endif 275 return 1; 276 } 277