1 /* $OpenBSD: bn_to_string.c,v 1.4 2023/04/10 13:57:32 tb Exp $ */ 2 /* 3 * Copyright (c) 2019 Theo Buehler <tb@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <err.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 23 #include <openssl/x509v3.h> 24 25 char *bn_to_string(const BIGNUM *bn); 26 27 struct convert_st { 28 const char *input; 29 const char *want; 30 }; 31 32 struct convert_st testcases[] = { 33 { 34 .input = "0x0", 35 .want = "0", 36 }, 37 { 38 .input = "-0x0", 39 .want = "0", 40 }, 41 { 42 .input = "0x7", 43 .want = "7", 44 }, 45 { 46 .input = "-0x7", 47 .want = "-7", 48 }, 49 { 50 .input = "0x8", 51 .want = "8", 52 }, 53 { 54 .input = "-0x8", 55 .want = "-8", 56 }, 57 { 58 .input = "0xF", 59 .want = "15", 60 }, 61 { 62 .input = "-0xF", 63 .want = "-15", 64 }, 65 { 66 .input = "0x10", 67 .want = "16", 68 }, 69 { 70 .input = "-0x10", 71 .want = "-16", 72 }, 73 { 74 .input = "0x7F", 75 .want = "127", 76 }, 77 { 78 .input = "-0x7F", 79 .want = "-127", 80 }, 81 { 82 .input = "0x80", 83 .want = "128", 84 }, 85 { 86 .input = "-0x80", 87 .want = "-128", 88 }, 89 { 90 .input = "0xFF", 91 .want = "255", 92 }, 93 { 94 .input = "-0xFF", 95 .want = "-255", 96 }, 97 { 98 .input = "0x100", 99 .want = "256", 100 }, 101 { 102 .input = "0x7FFF", 103 .want = "32767", 104 }, 105 { 106 .input = "-0x7FFF", 107 .want = "-32767", 108 }, 109 { 110 .input = "0x8000", 111 .want = "32768", 112 }, 113 { 114 .input = "-0x8000", 115 .want = "-32768", 116 }, 117 { 118 .input = "0xFFFF", 119 .want = "65535", 120 }, 121 { 122 .input = "-0xFFFF", 123 .want = "-65535", 124 }, 125 { 126 .input = "0x10000", 127 .want = "65536", 128 }, 129 { 130 .input = "-0x10000", 131 .want = "-65536", 132 }, 133 { 134 .input = "0x7FFFFFFF", 135 .want = "2147483647", 136 }, 137 { 138 .input = "-0x7FFFFFFF", 139 .want = "-2147483647", 140 }, 141 { 142 .input = "0x80000000", 143 .want = "2147483648", 144 }, 145 { 146 .input = "-0x80000000", 147 .want = "-2147483648", 148 }, 149 { 150 .input = "0xFFFFFFFF", 151 .want = "4294967295", 152 }, 153 { 154 .input = "-0xFFFFFFFF", 155 .want = "-4294967295", 156 }, 157 { 158 .input = "0x100000000", 159 .want = "4294967296", 160 }, 161 { 162 .input = "-0x100000000", 163 .want = "-4294967296", 164 }, 165 { 166 .input = "0x7FFFFFFFFFFFFFFF", 167 .want = "9223372036854775807", 168 }, 169 { 170 .input = "-0x7FFFFFFFFFFFFFFF", 171 .want = "-9223372036854775807", 172 }, 173 { 174 .input = "0x8000000000000000", 175 .want = "9223372036854775808", 176 }, 177 { 178 .input = "-0x8000000000000000", 179 .want = "-9223372036854775808", 180 }, 181 { 182 .input = "0xFFFFFFFFFFFFFFFF", 183 .want = "18446744073709551615", 184 }, 185 { 186 .input = "-0xFFFFFFFFFFFFFFFF", 187 .want = "-18446744073709551615", 188 }, 189 { 190 .input = "0x10000000000000000", 191 .want = "18446744073709551616", 192 }, 193 { 194 .input = "-0x10000000000000000", 195 .want = "-18446744073709551616", 196 }, 197 { 198 .input = "0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 199 .want = "170141183460469231731687303715884105727", 200 }, 201 { 202 .input = "-0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 203 .want = "-170141183460469231731687303715884105727", 204 }, 205 { 206 .input = "0x80000000000000000000000000000000", 207 .want = "0x80000000000000000000000000000000", 208 }, 209 { 210 .input = "-0x80000000000000000000000000000000", 211 .want = "-0x80000000000000000000000000000000", 212 }, 213 { 214 .input = "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 215 .want = "0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 216 }, 217 { 218 .input = "-0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 219 .want = "-0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 220 }, 221 { 222 .input = "0x100000000000000000000000000000000", 223 .want = "0x0100000000000000000000000000000000", 224 }, 225 { 226 .input = "-0x100000000000000000000000000000000", 227 .want = "-0x0100000000000000000000000000000000", 228 }, 229 { 230 .input = NULL, 231 }, 232 }; 233 234 int 235 main(int argc, char *argv[]) 236 { 237 struct convert_st *test; 238 ASN1_INTEGER *aint; 239 char *got; 240 int failed = 0; 241 242 for (test = testcases; test->input != NULL; test++) { 243 if ((aint = s2i_ASN1_INTEGER(NULL, test->input)) == NULL) 244 errx(1, "s2i_ASN1_INTEGER(%s)", test->input); 245 if ((got = i2s_ASN1_INTEGER(NULL, aint)) == NULL) 246 errx(1, "i2s_ASN1_INTEGER(%s)", test->input); 247 if (strcmp(got, test->want) != 0) { 248 warnx("want: %s, got: %s", test->want, got); 249 failed |= 1; 250 } 251 ASN1_INTEGER_free(aint); 252 free(got); 253 } 254 255 return failed; 256 } 257