1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] */ 56 57 #include <openssl/asn1.h> 58 59 #include <string.h> 60 #include <time.h> 61 62 #include <openssl/err.h> 63 #include <openssl/mem.h> 64 65 #include "asn1_locl.h" 66 67 int asn1_generalizedtime_to_tm(struct tm *tm, const ASN1_GENERALIZEDTIME *d) 68 { 69 static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 }; 70 static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 }; 71 char *a; 72 int n, i, l, o; 73 74 if (d->type != V_ASN1_GENERALIZEDTIME) 75 return (0); 76 l = d->length; 77 a = (char *)d->data; 78 o = 0; 79 /* 80 * GENERALIZEDTIME is similar to UTCTIME except the year is represented 81 * as YYYY. This stuff treats everything as a two digit field so make 82 * first two fields 00 to 99 83 */ 84 if (l < 13) 85 goto err; 86 for (i = 0; i < 7; i++) { 87 if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) { 88 i++; 89 if (tm) 90 tm->tm_sec = 0; 91 break; 92 } 93 if ((a[o] < '0') || (a[o] > '9')) 94 goto err; 95 n = a[o] - '0'; 96 if (++o > l) 97 goto err; 98 99 if ((a[o] < '0') || (a[o] > '9')) 100 goto err; 101 n = (n * 10) + a[o] - '0'; 102 if (++o > l) 103 goto err; 104 105 if ((n < min[i]) || (n > max[i])) 106 goto err; 107 if (tm) { 108 switch (i) { 109 case 0: 110 tm->tm_year = n * 100 - 1900; 111 break; 112 case 1: 113 tm->tm_year += n; 114 break; 115 case 2: 116 tm->tm_mon = n - 1; 117 break; 118 case 3: 119 tm->tm_mday = n; 120 break; 121 case 4: 122 tm->tm_hour = n; 123 break; 124 case 5: 125 tm->tm_min = n; 126 break; 127 case 6: 128 tm->tm_sec = n; 129 break; 130 } 131 } 132 } 133 /* 134 * Optional fractional seconds: decimal point followed by one or more 135 * digits. 136 */ 137 if (a[o] == '.') { 138 if (++o > l) 139 goto err; 140 i = o; 141 while ((a[o] >= '0') && (a[o] <= '9') && (o <= l)) 142 o++; 143 /* Must have at least one digit after decimal point */ 144 if (i == o) 145 goto err; 146 } 147 148 if (a[o] == 'Z') 149 o++; 150 else if ((a[o] == '+') || (a[o] == '-')) { 151 int offsign = a[o] == '-' ? -1 : 1, offset = 0; 152 o++; 153 if (o + 4 > l) 154 goto err; 155 for (i = 7; i < 9; i++) { 156 if ((a[o] < '0') || (a[o] > '9')) 157 goto err; 158 n = a[o] - '0'; 159 o++; 160 if ((a[o] < '0') || (a[o] > '9')) 161 goto err; 162 n = (n * 10) + a[o] - '0'; 163 if ((n < min[i]) || (n > max[i])) 164 goto err; 165 if (tm) { 166 if (i == 7) 167 offset = n * 3600; 168 else if (i == 8) 169 offset += n * 60; 170 } 171 o++; 172 } 173 if (offset && !OPENSSL_gmtime_adj(tm, 0, offset * offsign)) 174 return 0; 175 } else if (a[o]) { 176 /* Missing time zone information. */ 177 goto err; 178 } 179 return (o == l); 180 err: 181 return (0); 182 } 183 184 int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *d) 185 { 186 return asn1_generalizedtime_to_tm(NULL, d); 187 } 188 189 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str) 190 { 191 ASN1_GENERALIZEDTIME t; 192 193 t.type = V_ASN1_GENERALIZEDTIME; 194 t.length = strlen(str); 195 t.data = (unsigned char *)str; 196 if (ASN1_GENERALIZEDTIME_check(&t)) { 197 if (s != NULL) { 198 if (!ASN1_STRING_set((ASN1_STRING *)s, 199 (unsigned char *)str, t.length)) 200 return 0; 201 s->type = V_ASN1_GENERALIZEDTIME; 202 } 203 return (1); 204 } else 205 return (0); 206 } 207 208 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, 209 time_t t) 210 { 211 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0); 212 } 213 214 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s, 215 time_t t, int offset_day, 216 long offset_sec) 217 { 218 char *p; 219 struct tm *ts; 220 struct tm data; 221 size_t len = 20; 222 ASN1_GENERALIZEDTIME *tmps = NULL; 223 224 if (s == NULL) 225 tmps = ASN1_GENERALIZEDTIME_new(); 226 else 227 tmps = s; 228 if (tmps == NULL) 229 return NULL; 230 231 ts = OPENSSL_gmtime(&t, &data); 232 if (ts == NULL) 233 goto err; 234 235 if (offset_day || offset_sec) { 236 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 237 goto err; 238 } 239 240 p = (char *)tmps->data; 241 if ((p == NULL) || ((size_t)tmps->length < len)) { 242 p = OPENSSL_malloc(len); 243 if (p == NULL) { 244 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); 245 goto err; 246 } 247 OPENSSL_free(tmps->data); 248 tmps->data = (unsigned char *)p; 249 } 250 251 BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900, 252 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, 253 ts->tm_sec); 254 tmps->length = strlen(p); 255 tmps->type = V_ASN1_GENERALIZEDTIME; 256 return tmps; 257 err: 258 if (s == NULL) 259 ASN1_GENERALIZEDTIME_free(tmps); 260 return NULL; 261 } 262
