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 <openssl/asn1t.h> 60 #include <openssl/buf.h> 61 #include <openssl/err.h> 62 #include <openssl/mem.h> 63 #include <openssl/time_support.h> 64 65 #include "asn1_locl.h" 66 67 68 /* This is an implementation of the ASN1 Time structure which is: 69 * Time ::= CHOICE { 70 * utcTime UTCTime, 71 * generalTime GeneralizedTime } 72 * written by Steve Henson. 73 */ 74 75 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME) 76 77 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME) 78 79 #if 0 80 int i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp) 81 { 82 if(a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) 83 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, 84 a->type ,V_ASN1_UNIVERSAL)); 85 OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_EXPECTING_A_TIME); 86 return -1; 87 } 88 #endif 89 90 91 ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t) 92 { 93 return ASN1_TIME_adj(s, t, 0, 0); 94 } 95 96 ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t, 97 int offset_day, long offset_sec) 98 { 99 struct tm *ts; 100 struct tm data; 101 102 ts=OPENSSL_gmtime(&t,&data); 103 if (ts == NULL) 104 { 105 OPENSSL_PUT_ERROR(ASN1, ASN1_TIME_adj, ASN1_R_ERROR_GETTING_TIME); 106 return NULL; 107 } 108 if (offset_day || offset_sec) 109 { 110 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 111 return NULL; 112 } 113 if((ts->tm_year >= 50) && (ts->tm_year < 150)) 114 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec); 115 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec); 116 } 117 118 int ASN1_TIME_check(ASN1_TIME *t) 119 { 120 if (t->type == V_ASN1_GENERALIZEDTIME) 121 return ASN1_GENERALIZEDTIME_check(t); 122 else if (t->type == V_ASN1_UTCTIME) 123 return ASN1_UTCTIME_check(t); 124 return 0; 125 } 126 127 /* Convert an ASN1_TIME structure to GeneralizedTime */ 128 ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out) 129 { 130 ASN1_GENERALIZEDTIME *ret; 131 char *str; 132 int newlen; 133 134 if (!ASN1_TIME_check(t)) return NULL; 135 136 if (!out || !*out) 137 { 138 if (!(ret = ASN1_GENERALIZEDTIME_new ())) 139 return NULL; 140 if (out) *out = ret; 141 } 142 else ret = *out; 143 144 /* If already GeneralizedTime just copy across */ 145 if (t->type == V_ASN1_GENERALIZEDTIME) 146 { 147 if(!ASN1_STRING_set(ret, t->data, t->length)) 148 return NULL; 149 return ret; 150 } 151 152 /* grow the string */ 153 if (!ASN1_STRING_set(ret, NULL, t->length + 2)) 154 return NULL; 155 /* ASN1_STRING_set() allocated 'len + 1' bytes. */ 156 newlen = t->length + 2 + 1; 157 str = (char *)ret->data; 158 /* Work out the century and prepend */ 159 if (t->data[0] >= '5') BUF_strlcpy(str, "19", newlen); 160 else BUF_strlcpy(str, "20", newlen); 161 162 BUF_strlcat(str, (char *)t->data, newlen); 163 164 return ret; 165 } 166 167 int ASN1_TIME_set_string(ASN1_TIME *s, const char *str) 168 { 169 ASN1_TIME t; 170 171 t.length = strlen(str); 172 t.data = (unsigned char *)str; 173 t.flags = 0; 174 175 t.type = V_ASN1_UTCTIME; 176 177 if (!ASN1_TIME_check(&t)) 178 { 179 t.type = V_ASN1_GENERALIZEDTIME; 180 if (!ASN1_TIME_check(&t)) 181 return 0; 182 } 183 184 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t)) 185 return 0; 186 187 return 1; 188 } 189 190 static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t) 191 { 192 if (t == NULL) 193 { 194 time_t now_t; 195 time(&now_t); 196 if (OPENSSL_gmtime(&now_t, tm)) 197 return 1; 198 return 0; 199 } 200 201 if (t->type == V_ASN1_UTCTIME) 202 return asn1_utctime_to_tm(tm, t); 203 else if (t->type == V_ASN1_GENERALIZEDTIME) 204 return asn1_generalizedtime_to_tm(tm, t); 205 206 return 0; 207 } 208 209 int ASN1_TIME_diff(int *pday, int *psec, 210 const ASN1_TIME *from, const ASN1_TIME *to) 211 { 212 struct tm tm_from, tm_to; 213 if (!asn1_time_to_tm(&tm_from, from)) 214 return 0; 215 if (!asn1_time_to_tm(&tm_to, to)) 216 return 0; 217 return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to); 218 } 219
