1 /* $OpenBSD: a_time.c,v 1.21 2014/07/11 08:44:47 jsing Exp $ */ 2 /* ==================================================================== 3 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this 18 * software must display the following acknowledgment: 19 * "This product includes software developed by the OpenSSL Project 20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 21 * 22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23 * endorse or promote products derived from this software without 24 * prior written permission. For written permission, please contact 25 * licensing@OpenSSL.org. 26 * 27 * 5. Products derived from this software may not be called "OpenSSL" 28 * nor may "OpenSSL" appear in their names without prior written 29 * permission of the OpenSSL Project. 30 * 31 * 6. Redistributions of any form whatsoever must retain the following 32 * acknowledgment: 33 * "This product includes software developed by the OpenSSL Project 34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47 * OF THE POSSIBILITY OF SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This product includes cryptographic software written by Eric Young 51 * (eay@cryptsoft.com). This product includes software written by Tim 52 * Hudson (tjh@cryptsoft.com). 53 * 54 */ 55 56 /* This is an implementation of the ASN1 Time structure which is: 57 * Time ::= CHOICE { 58 * utcTime UTCTime, 59 * generalTime GeneralizedTime } 60 * written by Steve Henson. 61 */ 62 63 #include <stdio.h> 64 #include <string.h> 65 #include <time.h> 66 67 #include <openssl/asn1t.h> 68 #include <openssl/err.h> 69 70 #include "o_time.h" 71 72 IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME) 73 74 IMPLEMENT_ASN1_FUNCTIONS(ASN1_TIME) 75 76 #if 0 77 int 78 i2d_ASN1_TIME(ASN1_TIME *a, unsigned char **pp) 79 { 80 if (a->type == V_ASN1_UTCTIME || a->type == V_ASN1_GENERALIZEDTIME) 81 return(i2d_ASN1_bytes((ASN1_STRING *)a, pp, 82 a->type, V_ASN1_UNIVERSAL)); 83 ASN1err(ASN1_F_I2D_ASN1_TIME, ASN1_R_EXPECTING_A_TIME); 84 return -1; 85 } 86 #endif 87 88 ASN1_TIME * 89 ASN1_TIME_set(ASN1_TIME *s, time_t t) 90 { 91 return ASN1_TIME_adj(s, t, 0, 0); 92 } 93 94 ASN1_TIME * 95 ASN1_TIME_adj(ASN1_TIME *s, time_t t, int offset_day, long offset_sec) 96 { 97 struct tm *ts; 98 struct tm data; 99 100 ts = gmtime_r(&t, &data); 101 if (ts == NULL) { 102 ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME); 103 return NULL; 104 } 105 if (offset_day || offset_sec) { 106 if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) 107 return NULL; 108 } 109 if ((ts->tm_year >= 50) && (ts->tm_year < 150)) 110 return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec); 111 return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec); 112 } 113 114 int 115 ASN1_TIME_check(ASN1_TIME *t) 116 { 117 if (t->type == V_ASN1_GENERALIZEDTIME) 118 return ASN1_GENERALIZEDTIME_check(t); 119 else if (t->type == V_ASN1_UTCTIME) 120 return ASN1_UTCTIME_check(t); 121 return 0; 122 } 123 124 /* Convert an ASN1_TIME structure to GeneralizedTime */ 125 static ASN1_GENERALIZEDTIME * 126 ASN1_TIME_to_generalizedtime_internal(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out) 127 { 128 ASN1_GENERALIZEDTIME *ret; 129 char *str; 130 int newlen; 131 int i; 132 133 if (!ASN1_TIME_check(t)) 134 return NULL; 135 136 ret = *out; 137 138 /* If already GeneralizedTime just copy across */ 139 if (t->type == V_ASN1_GENERALIZEDTIME) { 140 if (!ASN1_STRING_set(ret, t->data, t->length)) 141 return NULL; 142 return ret; 143 } 144 145 /* grow the string */ 146 if (!ASN1_STRING_set(ret, NULL, t->length + 2)) 147 return NULL; 148 /* ASN1_STRING_set() allocated 'len + 1' bytes. */ 149 newlen = t->length + 2 + 1; 150 str = (char *)ret->data; 151 /* XXX ASN1_TIME is not Y2050 compatible */ 152 i = snprintf(str, newlen, "%s%s", (t->data[0] >= '5') ? "19" : "20", 153 (char *) t->data); 154 if (i == -1 || i >= newlen) { 155 M_ASN1_GENERALIZEDTIME_free(ret); 156 *out = NULL; 157 return NULL; 158 } 159 return ret; 160 } 161 162 ASN1_GENERALIZEDTIME * 163 ASN1_TIME_to_generalizedtime(ASN1_TIME *t, ASN1_GENERALIZEDTIME **out) 164 { 165 ASN1_GENERALIZEDTIME *tmp = NULL, *ret; 166 167 if (!out || !*out) { 168 if (!(tmp = ASN1_GENERALIZEDTIME_new())) 169 return NULL; 170 if (out != NULL) 171 *out = tmp; 172 else 173 out = &tmp; 174 } 175 176 ret = ASN1_TIME_to_generalizedtime_internal(t, out); 177 if (ret == NULL && tmp != NULL) 178 ASN1_GENERALIZEDTIME_free(tmp); 179 180 return ret; 181 } 182 183 int 184 ASN1_TIME_set_string(ASN1_TIME *s, const char *str) 185 { 186 ASN1_TIME t; 187 188 t.length = strlen(str); 189 t.data = (unsigned char *)str; 190 t.flags = 0; 191 192 t.type = V_ASN1_UTCTIME; 193 194 if (!ASN1_TIME_check(&t)) { 195 t.type = V_ASN1_GENERALIZEDTIME; 196 if (!ASN1_TIME_check(&t)) 197 return 0; 198 } 199 200 if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t)) 201 return 0; 202 203 return 1; 204 } 205