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/asn1t.h> 63 #include <openssl/buf.h> 64 #include <openssl/err.h> 65 #include <openssl/mem.h> 66 67 #include "asn1_locl.h" 68 69 /* 70 * This is an implementation of the ASN1 Time structure which is: Time ::= 71 * CHOICE { utcTime UTCTime, generalTime GeneralizedTime } written by Steve 72 * Henson. 73 */ 74 75 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME) 76 77 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME) 78 79 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t) 80 { 81 return ASN1_TIME_adj(s, t, 0, 0); 82 } 83 84 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t, 85 int offset_day, long offset_sec) 86 { 87 struct tm *ts; 88 struct tm data; 89 90 ts = OPENSSL_gmtime(&t, &data); 91 if (ts == NULL) { 92 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ERROR_GETTING_TIME); 93 return NULL; 94 } 95 if (offset_day || offset_sec) { 96 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 97 return NULL; 98 } 99 if ((ts->tm_year >= 50) && (ts->tm_year < 150)) 100 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec); 101 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec); 102 } 103 104 int ASN1_TIME_check(ASN1_TIME *t) 105 { 106 if (t->type == V_ASN1_GENERALIZEDTIME) 107 return ASN1_GENERALIZEDTIME_check(t); 108 else if (t->type == V_ASN1_UTCTIME) 109 return ASN1_UTCTIME_check(t); 110 return 0; 111 } 112 113 /* Convert an ASN1_TIME structure to GeneralizedTime */ 114 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, 115 ASN1_GENERALIZEDTIME **out) 116 { 117 ASN1_GENERALIZEDTIME *ret = NULL; 118 char *str; 119 int newlen; 120 121 if (!ASN1_TIME_check(t)) 122 return NULL; 123 124 if (!out || !*out) { 125 if (!(ret = ASN1_GENERALIZEDTIME_new())) 126 goto err; 127 } else { 128 ret = *out; 129 } 130 131 /* If already GeneralizedTime just copy across */ 132 if (t->type == V_ASN1_GENERALIZEDTIME) { 133 if (!ASN1_STRING_set(ret, t->data, t->length)) 134 goto err; 135 goto done; 136 } 137 138 /* grow the string */ 139 if (!ASN1_STRING_set(ret, NULL, t->length + 2)) 140 goto err; 141 /* ASN1_STRING_set() allocated 'len + 1' bytes. */ 142 newlen = t->length + 2 + 1; 143 str = (char *)ret->data; 144 /* Work out the century and prepend */ 145 if (t->data[0] >= '5') 146 BUF_strlcpy(str, "19", newlen); 147 else 148 BUF_strlcpy(str, "20", newlen); 149 150 BUF_strlcat(str, (char *)t->data, newlen); 151 152 done: 153 if (out != NULL && *out == NULL) 154 *out = ret; 155 return ret; 156 157 err: 158 if (out == NULL || *out != ret) 159 ASN1_GENERALIZEDTIME_free(ret); 160 return NULL; 161 } 162 163 164 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str) 165 { 166 ASN1_TIME t; 167 168 t.length = strlen(str); 169 t.data = (unsigned char *)str; 170 t.flags = 0; 171 172 t.type = V_ASN1_UTCTIME; 173 174 if (!ASN1_TIME_check(&t)) { 175 t.type = V_ASN1_GENERALIZEDTIME; 176 if (!ASN1_TIME_check(&t)) 177 return 0; 178 } 179 180 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t)) 181 return 0; 182 183 return 1; 184 } 185 186 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t) 187 { 188 if (t == NULL) { 189 time_t now_t; 190 time(&now_t); 191 if (OPENSSL_gmtime(&now_t, tm)) 192 return 1; 193 return 0; 194 } 195 196 if (t->type == V_ASN1_UTCTIME) 197 return asn1_utctime_to_tm(tm, t); 198 else if (t->type == V_ASN1_GENERALIZEDTIME) 199 return asn1_generalizedtime_to_tm(tm, t); 200 201 return 0; 202 } 203 204 int ASN1_TIME_diff(int *pday, int *psec, 205 const ASN1_TIME *from, const ASN1_TIME *to) 206 { 207 struct tm tm_from, tm_to; 208 if (!asn1_time_to_tm(&tm_from, from)) 209 return 0; 210 if (!asn1_time_to_tm(&tm_to, to)) 211 return 0; 212 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to); 213 } 214
