1 /* crypto/asn1/a_gentm.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 /* 60 * GENERALIZEDTIME implementation, written by Steve Henson. Based on UTCTIME 61 */ 62 63 #include <stdio.h> 64 #include <time.h> 65 #include "cryptlib.h" 66 #include "o_time.h" 67 #include <openssl/asn1.h> 68 69 #if 0 70 71 int i2d_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME *a, unsigned char **pp) 72 { 73 # ifdef CHARSET_EBCDIC 74 /* KLUDGE! We convert to ascii before writing DER */ 75 int len; 76 char tmp[24]; 77 ASN1_STRING tmpstr = *(ASN1_STRING *)a; 78 79 len = tmpstr.length; 80 ebcdic2ascii(tmp, tmpstr.data, (len >= sizeof tmp) ? sizeof tmp : len); 81 tmpstr.data = tmp; 82 83 a = (ASN1_GENERALIZEDTIME *)&tmpstr; 84 # endif 85 return (i2d_ASN1_bytes((ASN1_STRING *)a, pp, 86 V_ASN1_GENERALIZEDTIME, V_ASN1_UNIVERSAL)); 87 } 88 89 ASN1_GENERALIZEDTIME *d2i_ASN1_GENERALIZEDTIME(ASN1_GENERALIZEDTIME **a, 90 unsigned char **pp, 91 long length) 92 { 93 ASN1_GENERALIZEDTIME *ret = NULL; 94 95 ret = 96 (ASN1_GENERALIZEDTIME *)d2i_ASN1_bytes((ASN1_STRING **)a, pp, length, 97 V_ASN1_GENERALIZEDTIME, 98 V_ASN1_UNIVERSAL); 99 if (ret == NULL) { 100 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ERR_R_NESTED_ASN1_ERROR); 101 return (NULL); 102 } 103 # ifdef CHARSET_EBCDIC 104 ascii2ebcdic(ret->data, ret->data, ret->length); 105 # endif 106 if (!ASN1_GENERALIZEDTIME_check(ret)) { 107 ASN1err(ASN1_F_D2I_ASN1_GENERALIZEDTIME, ASN1_R_INVALID_TIME_FORMAT); 108 goto err; 109 } 110 111 return (ret); 112 err: 113 if ((ret != NULL) && ((a == NULL) || (*a != ret))) 114 M_ASN1_GENERALIZEDTIME_free(ret); 115 return (NULL); 116 } 117 118 #endif 119 120 int ASN1_GENERALIZEDTIME_check(ASN1_GENERALIZEDTIME *d) 121 { 122 static const int min[9] = { 0, 0, 1, 1, 0, 0, 0, 0, 0 }; 123 static const int max[9] = { 99, 99, 12, 31, 23, 59, 59, 12, 59 }; 124 char *a; 125 int n, i, l, o; 126 127 if (d->type != V_ASN1_GENERALIZEDTIME) 128 return (0); 129 l = d->length; 130 a = (char *)d->data; 131 o = 0; 132 /* 133 * GENERALIZEDTIME is similar to UTCTIME except the year is represented 134 * as YYYY. This stuff treats everything as a two digit field so make 135 * first two fields 00 to 99 136 */ 137 if (l < 13) 138 goto err; 139 for (i = 0; i < 7; i++) { 140 if ((i == 6) && ((a[o] == 'Z') || (a[o] == '+') || (a[o] == '-'))) { 141 i++; 142 break; 143 } 144 if ((a[o] < '0') || (a[o] > '9')) 145 goto err; 146 n = a[o] - '0'; 147 if (++o > l) 148 goto err; 149 150 if ((a[o] < '0') || (a[o] > '9')) 151 goto err; 152 n = (n * 10) + a[o] - '0'; 153 if (++o > l) 154 goto err; 155 156 if ((n < min[i]) || (n > max[i])) 157 goto err; 158 } 159 /* 160 * Optional fractional seconds: decimal point followed by one or more 161 * digits. 162 */ 163 if (a[o] == '.') { 164 if (++o > l) 165 goto err; 166 i = o; 167 while ((a[o] >= '0') && (a[o] <= '9') && (o <= l)) 168 o++; 169 /* Must have at least one digit after decimal point */ 170 if (i == o) 171 goto err; 172 } 173 174 if (a[o] == 'Z') 175 o++; 176 else if ((a[o] == '+') || (a[o] == '-')) { 177 o++; 178 if (o + 4 > l) 179 goto err; 180 for (i = 7; i < 9; i++) { 181 if ((a[o] < '0') || (a[o] > '9')) 182 goto err; 183 n = a[o] - '0'; 184 o++; 185 if ((a[o] < '0') || (a[o] > '9')) 186 goto err; 187 n = (n * 10) + a[o] - '0'; 188 if ((n < min[i]) || (n > max[i])) 189 goto err; 190 o++; 191 } 192 } else { 193 /* Missing time zone information. */ 194 goto err; 195 } 196 return (o == l); 197 err: 198 return (0); 199 } 200 201 int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, const char *str) 202 { 203 ASN1_GENERALIZEDTIME t; 204 205 t.type = V_ASN1_GENERALIZEDTIME; 206 t.length = strlen(str); 207 t.data = (unsigned char *)str; 208 if (ASN1_GENERALIZEDTIME_check(&t)) { 209 if (s != NULL) { 210 if (!ASN1_STRING_set((ASN1_STRING *)s, 211 (unsigned char *)str, t.length)) 212 return 0; 213 s->type = V_ASN1_GENERALIZEDTIME; 214 } 215 return (1); 216 } else 217 return (0); 218 } 219 220 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, 221 time_t t) 222 { 223 return ASN1_GENERALIZEDTIME_adj(s, t, 0, 0); 224 } 225 226 ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s, 227 time_t t, int offset_day, 228 long offset_sec) 229 { 230 char *p; 231 struct tm *ts; 232 struct tm data; 233 size_t len = 20; 234 235 if (s == NULL) 236 s = M_ASN1_GENERALIZEDTIME_new(); 237 if (s == NULL) 238 return (NULL); 239 240 ts = OPENSSL_gmtime(&t, &data); 241 if (ts == NULL) 242 return (NULL); 243 244 if (offset_day || offset_sec) { 245 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 246 return NULL; 247 } 248 249 p = (char *)s->data; 250 if ((p == NULL) || ((size_t)s->length < len)) { 251 p = OPENSSL_malloc(len); 252 if (p == NULL) { 253 ASN1err(ASN1_F_ASN1_GENERALIZEDTIME_ADJ, ERR_R_MALLOC_FAILURE); 254 return (NULL); 255 } 256 if (s->data != NULL) 257 OPENSSL_free(s->data); 258 s->data = (unsigned char *)p; 259 } 260 261 BIO_snprintf(p, len, "%04d%02d%02d%02d%02d%02dZ", ts->tm_year + 1900, 262 ts->tm_mon + 1, ts->tm_mday, ts->tm_hour, ts->tm_min, 263 ts->tm_sec); 264 s->length = strlen(p); 265 s->type = V_ASN1_GENERALIZEDTIME; 266 #ifdef CHARSET_EBCDIC_not 267 ebcdic2ascii(s->data, s->data, s->length); 268 #endif 269 return (s); 270 } 271