1 /* $OpenBSD: test_sshbuf_getput_crypto.c,v 1.2 2019/01/21 12:29:35 djm Exp $ */ 2 /* 3 * Regress test for sshbuf.h buffer API 4 * 5 * Placed in the public domain 6 */ 7 8 #include "includes.h" 9 10 #ifdef WITH_OPENSSL 11 12 #include <sys/types.h> 13 #include <sys/param.h> 14 #include <stdio.h> 15 #ifdef HAVE_STDINT_H 16 # include <stdint.h> 17 #endif 18 #include <stdlib.h> 19 #include <string.h> 20 21 #include <openssl/bn.h> 22 #include <openssl/objects.h> 23 #ifdef OPENSSL_HAS_NISTP256 24 # include <openssl/ec.h> 25 #endif 26 27 #include "../test_helper/test_helper.h" 28 #include "ssherr.h" 29 #include "sshbuf.h" 30 31 void sshbuf_getput_crypto_tests(void); 32 33 void 34 sshbuf_getput_crypto_tests(void) 35 { 36 struct sshbuf *p1; 37 BIGNUM *bn, *bn2; 38 const char *hexbn1 = "0102030405060708090a0b0c0d0e0f10"; 39 /* This one has MSB set to test bignum2 encoding negative-avoidance */ 40 const char *hexbn2 = "f0e0d0c0b0a0908070605040302010007fff11"; 41 u_char expbn1[] = { 42 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 43 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 44 }; 45 u_char expbn2[] = { 46 0xf0, 0xe0, 0xd0, 0xc0, 0xb0, 0xa0, 0x90, 0x80, 47 0x70, 0x60, 0x50, 0x40, 0x30, 0x20, 0x10, 0x00, 48 0x7f, 0xff, 0x11 49 }; 50 #if defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256) 51 const u_char *d; 52 size_t s; 53 BIGNUM *bn_x, *bn_y; 54 int ec256_nid = NID_X9_62_prime256v1; 55 char *ec256_x = "0C828004839D0106AA59575216191357" 56 "34B451459DADB586677EF9DF55784999"; 57 char *ec256_y = "4D196B50F0B4E94B3C73E3A9D4CD9DF2" 58 "C8F9A35E42BDD047550F69D80EC23CD4"; 59 u_char expec256[] = { 60 0x04, 61 0x0c, 0x82, 0x80, 0x04, 0x83, 0x9d, 0x01, 0x06, 62 0xaa, 0x59, 0x57, 0x52, 0x16, 0x19, 0x13, 0x57, 63 0x34, 0xb4, 0x51, 0x45, 0x9d, 0xad, 0xb5, 0x86, 64 0x67, 0x7e, 0xf9, 0xdf, 0x55, 0x78, 0x49, 0x99, 65 0x4d, 0x19, 0x6b, 0x50, 0xf0, 0xb4, 0xe9, 0x4b, 66 0x3c, 0x73, 0xe3, 0xa9, 0xd4, 0xcd, 0x9d, 0xf2, 67 0xc8, 0xf9, 0xa3, 0x5e, 0x42, 0xbd, 0xd0, 0x47, 68 0x55, 0x0f, 0x69, 0xd8, 0x0e, 0xc2, 0x3c, 0xd4 69 }; 70 EC_KEY *eck; 71 EC_POINT *ecp; 72 #endif 73 int r; 74 75 #define MKBN(b, bnn) \ 76 do { \ 77 bnn = NULL; \ 78 ASSERT_INT_GT(BN_hex2bn(&bnn, b), 0); \ 79 } while (0) 80 81 TEST_START("sshbuf_put_bignum2"); 82 MKBN(hexbn1, bn); 83 p1 = sshbuf_new(); 84 ASSERT_PTR_NE(p1, NULL); 85 ASSERT_INT_EQ(sshbuf_put_bignum2(p1, bn), 0); 86 ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn1) + 4); 87 ASSERT_U32_EQ(PEEK_U32(sshbuf_ptr(p1)), (u_int32_t)BN_num_bytes(bn)); 88 ASSERT_MEM_EQ(sshbuf_ptr(p1) + 4, expbn1, sizeof(expbn1)); 89 BN_free(bn); 90 sshbuf_free(p1); 91 TEST_DONE(); 92 93 TEST_START("sshbuf_put_bignum2 limited"); 94 MKBN(hexbn1, bn); 95 p1 = sshbuf_new(); 96 ASSERT_PTR_NE(p1, NULL); 97 ASSERT_INT_EQ(sshbuf_set_max_size(p1, sizeof(expbn1) + 3), 0); 98 r = sshbuf_put_bignum2(p1, bn); 99 ASSERT_INT_EQ(r, SSH_ERR_NO_BUFFER_SPACE); 100 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 0); 101 BN_free(bn); 102 sshbuf_free(p1); 103 TEST_DONE(); 104 105 TEST_START("sshbuf_put_bignum2 bn2"); 106 MKBN(hexbn2, bn); 107 p1 = sshbuf_new(); 108 ASSERT_PTR_NE(p1, NULL); 109 ASSERT_INT_EQ(sshbuf_put_bignum2(p1, bn), 0); 110 ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 4 + 1); /* MSB */ 111 ASSERT_U32_EQ(PEEK_U32(sshbuf_ptr(p1)), (u_int32_t)BN_num_bytes(bn) + 1); 112 ASSERT_U8_EQ(*(sshbuf_ptr(p1) + 4), 0x00); 113 ASSERT_MEM_EQ(sshbuf_ptr(p1) + 5, expbn2, sizeof(expbn2)); 114 BN_free(bn); 115 sshbuf_free(p1); 116 TEST_DONE(); 117 118 TEST_START("sshbuf_put_bignum2 bn2 limited"); 119 MKBN(hexbn2, bn); 120 p1 = sshbuf_new(); 121 ASSERT_PTR_NE(p1, NULL); 122 ASSERT_INT_EQ(sshbuf_set_max_size(p1, sizeof(expbn2) + 3), 0); 123 r = sshbuf_put_bignum2(p1, bn); 124 ASSERT_INT_EQ(r, SSH_ERR_NO_BUFFER_SPACE); 125 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 0); 126 BN_free(bn); 127 sshbuf_free(p1); 128 TEST_DONE(); 129 130 TEST_START("sshbuf_get_bignum2"); 131 MKBN(hexbn1, bn); 132 p1 = sshbuf_new(); 133 ASSERT_PTR_NE(p1, NULL); 134 ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn)), 0); 135 ASSERT_INT_EQ(sshbuf_put(p1, expbn1, sizeof(expbn1)), 0); 136 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 4 + sizeof(expbn1)); 137 ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xd00f), 0); 138 bn2 = NULL; 139 ASSERT_INT_EQ(sshbuf_get_bignum2(p1, &bn2), 0); 140 ASSERT_BIGNUM_EQ(bn, bn2); 141 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2); 142 BN_free(bn); 143 BN_free(bn2); 144 sshbuf_free(p1); 145 TEST_DONE(); 146 147 TEST_START("sshbuf_get_bignum2 truncated"); 148 MKBN(hexbn1, bn); 149 p1 = sshbuf_new(); 150 ASSERT_PTR_NE(p1, NULL); 151 ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn)), 0); 152 ASSERT_INT_EQ(sshbuf_put(p1, expbn1, sizeof(expbn1) - 1), 0); 153 bn2 = NULL; 154 r = sshbuf_get_bignum2(p1, &bn2); 155 ASSERT_INT_EQ(r, SSH_ERR_MESSAGE_INCOMPLETE); 156 ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn1) + 3); 157 BN_free(bn); 158 BN_free(bn2); 159 sshbuf_free(p1); 160 TEST_DONE(); 161 162 TEST_START("sshbuf_get_bignum2 giant"); 163 MKBN(hexbn1, bn); 164 p1 = sshbuf_new(); 165 ASSERT_PTR_NE(p1, NULL); 166 ASSERT_INT_EQ(sshbuf_put_u32(p1, 65536), 0); 167 ASSERT_INT_EQ(sshbuf_reserve(p1, 65536, NULL), 0); 168 bn2 = NULL; 169 r = sshbuf_get_bignum2(p1, &bn2); 170 ASSERT_INT_EQ(r, SSH_ERR_BIGNUM_TOO_LARGE); 171 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 65536 + 4); 172 BN_free(bn); 173 BN_free(bn2); 174 sshbuf_free(p1); 175 TEST_DONE(); 176 177 TEST_START("sshbuf_get_bignum2 bn2"); 178 MKBN(hexbn2, bn); 179 p1 = sshbuf_new(); 180 ASSERT_PTR_NE(p1, NULL); 181 ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn) + 1), 0); /* MSB */ 182 ASSERT_INT_EQ(sshbuf_put_u8(p1, 0x00), 0); 183 ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2)), 0); 184 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 4 + 1 + sizeof(expbn2)); 185 ASSERT_INT_EQ(sshbuf_put_u16(p1, 0xd00f), 0); 186 bn2 = NULL; 187 ASSERT_INT_EQ(sshbuf_get_bignum2(p1, &bn2), 0); 188 ASSERT_BIGNUM_EQ(bn, bn2); 189 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 2); 190 BN_free(bn); 191 BN_free(bn2); 192 sshbuf_free(p1); 193 TEST_DONE(); 194 195 TEST_START("sshbuf_get_bignum2 bn2 truncated"); 196 MKBN(hexbn2, bn); 197 p1 = sshbuf_new(); 198 ASSERT_PTR_NE(p1, NULL); 199 ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn) + 1), 0); 200 ASSERT_INT_EQ(sshbuf_put_u8(p1, 0x00), 0); 201 ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2) - 1), 0); 202 bn2 = NULL; 203 r = sshbuf_get_bignum2(p1, &bn2); 204 ASSERT_INT_EQ(r, SSH_ERR_MESSAGE_INCOMPLETE); 205 ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 1 + 4 - 1); 206 BN_free(bn); 207 BN_free(bn2); 208 sshbuf_free(p1); 209 TEST_DONE(); 210 211 TEST_START("sshbuf_get_bignum2 bn2 negative"); 212 MKBN(hexbn2, bn); 213 p1 = sshbuf_new(); 214 ASSERT_PTR_NE(p1, NULL); 215 ASSERT_INT_EQ(sshbuf_put_u32(p1, BN_num_bytes(bn)), 0); 216 ASSERT_INT_EQ(sshbuf_put(p1, expbn2, sizeof(expbn2)), 0); 217 bn2 = NULL; 218 r = sshbuf_get_bignum2(p1, &bn2); 219 ASSERT_INT_EQ(r, SSH_ERR_BIGNUM_IS_NEGATIVE); 220 ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expbn2) + 4); 221 BN_free(bn); 222 BN_free(bn2); 223 sshbuf_free(p1); 224 TEST_DONE(); 225 226 #if defined(OPENSSL_HAS_ECC) && defined(OPENSSL_HAS_NISTP256) 227 TEST_START("sshbuf_put_ec"); 228 eck = EC_KEY_new_by_curve_name(ec256_nid); 229 ASSERT_PTR_NE(eck, NULL); 230 ecp = EC_POINT_new(EC_KEY_get0_group(eck)); 231 ASSERT_PTR_NE(ecp, NULL); 232 MKBN(ec256_x, bn_x); 233 MKBN(ec256_y, bn_y); 234 ASSERT_INT_EQ(EC_POINT_set_affine_coordinates_GFp( 235 EC_KEY_get0_group(eck), ecp, bn_x, bn_y, NULL), 1); 236 ASSERT_INT_EQ(EC_KEY_set_public_key(eck, ecp), 1); 237 BN_free(bn_x); 238 BN_free(bn_y); 239 EC_POINT_free(ecp); 240 p1 = sshbuf_new(); 241 ASSERT_PTR_NE(p1, NULL); 242 ASSERT_INT_EQ(sshbuf_put_eckey(p1, eck), 0); 243 ASSERT_INT_EQ(sshbuf_get_string_direct(p1, &d, &s), 0); 244 ASSERT_SIZE_T_EQ(s, sizeof(expec256)); 245 ASSERT_MEM_EQ(d, expec256, sizeof(expec256)); 246 sshbuf_free(p1); 247 EC_KEY_free(eck); 248 TEST_DONE(); 249 250 TEST_START("sshbuf_get_ec"); 251 eck = EC_KEY_new_by_curve_name(ec256_nid); 252 ASSERT_PTR_NE(eck, NULL); 253 p1 = sshbuf_new(); 254 ASSERT_PTR_NE(p1, NULL); 255 ASSERT_INT_EQ(sshbuf_put_string(p1, expec256, sizeof(expec256)), 0); 256 ASSERT_SIZE_T_EQ(sshbuf_len(p1), sizeof(expec256) + 4); 257 ASSERT_INT_EQ(sshbuf_put_u8(p1, 0x00), 0); 258 ASSERT_INT_EQ(sshbuf_get_eckey(p1, eck), 0); 259 bn_x = BN_new(); 260 bn_y = BN_new(); 261 ASSERT_PTR_NE(bn_x, NULL); 262 ASSERT_PTR_NE(bn_y, NULL); 263 ASSERT_INT_EQ(EC_POINT_get_affine_coordinates_GFp( 264 EC_KEY_get0_group(eck), EC_KEY_get0_public_key(eck), 265 bn_x, bn_y, NULL), 1); 266 MKBN(ec256_x, bn); 267 MKBN(ec256_y, bn2); 268 ASSERT_INT_EQ(BN_cmp(bn_x, bn), 0); 269 ASSERT_INT_EQ(BN_cmp(bn_y, bn2), 0); 270 ASSERT_SIZE_T_EQ(sshbuf_len(p1), 1); 271 sshbuf_free(p1); 272 EC_KEY_free(eck); 273 BN_free(bn_x); 274 BN_free(bn_y); 275 BN_free(bn); 276 BN_free(bn2); 277 TEST_DONE(); 278 #endif 279 } 280 281 #endif /* WITH_OPENSSL */ 282