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 #include <openssl/time_support.h> 67 68 #include "asn1_locl.h" 69 70 71 /* This is an implementation of the ASN1 Time structure which is: 72 * Time ::= CHOICE { 73 * utcTime UTCTime, 74 * generalTime GeneralizedTime } 75 * written by Steve Henson. 76 */ 77 78 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME) 79 80 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME) 81 82 #if 0 83 int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp) 84 { 85 if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) 86 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, 87 a->type ,V_ASN1_UNIVERSAL)); 88 OPENSSL_PUT_ERROR(ASN1, ASN1_R_EXPECTING_A_TIME); 89 return -1; 90 } 91 #endif 92 93 94 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t) 95 { 96 return ASN1_TIME_adj(s, t, 0, 0); 97 } 98 99 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t, 100 int offset_day, long offset_sec) 101 { 102 struct tm *ts; 103 struct tm data; 104 105 ts=OPENSSL_gmtime(&t,&data); 106 if (ts == NULL) 107 { 108 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ERROR_GETTING_TIME); 109 return NULL; 110 } 111 if (offset_day || offset_sec) 112 { 113 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 114 return NULL; 115 } 116 if((ts->tm_year >= 50) && (ts->tm_year < 150)) 117 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec); 118 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec); 119 } 120 121 int ASN1_TIME_check(ASN1_TIME *t) 122 { 123 if (t->type == V_ASN1_GENERALIZEDTIME) 124 return ASN1_GENERALIZEDTIME_check(t); 125 else if (t->type == V_ASN1_UTCTIME) 126 return ASN1_UTCTIME_check(t); 127 return 0; 128 } 129 130 /* Convert an ASN1_TIME structure to GeneralizedTime */ 131 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out) 132 { 133 ASN1_GENERALIZEDTIME *ret; 134 char *str; 135 int newlen; 136 137 if (!ASN1_TIME_check(t)) return NULL; 138 139 if (!out || !*out) 140 { 141 if (!(ret = ASN1_GENERALIZEDTIME_new ())) 142 return NULL; 143 if (out) *out = ret; 144 } 145 else ret = *out; 146 147 /* If already GeneralizedTime just copy across */ 148 if (t->type == V_ASN1_GENERALIZEDTIME) 149 { 150 if(!ASN1_STRING_set(ret, t->data, t->length)) 151 return NULL; 152 return ret; 153 } 154 155 /* grow the string */ 156 if (!ASN1_STRING_set(ret, NULL, t->length + 2)) 157 return NULL; 158 /* ASN1_STRING_set() allocated 'len + 1' bytes. */ 159 newlen = t->length + 2 + 1; 160 str = (char *)ret->data; 161 /* Work out the century and prepend */ 162 if (t->data[0] >= '5') BUF_strlcpy(str, "19", newlen); 163 else BUF_strlcpy(str, "20", newlen); 164 165 BUF_strlcat(str, (char *)t->data, newlen); 166 167 return ret; 168 } 169 170 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str) 171 { 172 ASN1_TIME t; 173 174 t.length = strlen(str); 175 t.data = (unsigned char *)str; 176 t.flags = 0; 177 178 t.type = V_ASN1_UTCTIME; 179 180 if (!ASN1_TIME_check(&t)) 181 { 182 t.type = V_ASN1_GENERALIZEDTIME; 183 if (!ASN1_TIME_check(&t)) 184 return 0; 185 } 186 187 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t)) 188 return 0; 189 190 return 1; 191 } 192 193 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t) 194 { 195 if (t == NULL) 196 { 197 time_t now_t; 198 time(&now_t); 199 if (OPENSSL_gmtime(&now_t, tm)) 200 return 1; 201 return 0; 202 } 203 204 if (t->type == V_ASN1_UTCTIME) 205 return asn1_utctime_to_tm(tm, t); 206 else if (t->type == V_ASN1_GENERALIZEDTIME) 207 return asn1_generalizedtime_to_tm(tm, t); 208 209 return 0; 210 } 211 212 int ASN1_TIME_diff(int *pday, int *psec, 213 const ASN1_TIME *from, const ASN1_TIME *to) 214 { 215 struct tm tm_from, tm_to; 216 if (!asn1_time_to_tm(&tm_from, from)) 217 return 0; 218 if (!asn1_time_to_tm(&tm_to, to)) 219 return 0; 220 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to); 221 } 222
