Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/asn1/a_utctm.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 | #include <stdio.h> |
| 60 | #include <time.h> |
| 61 | #include "cryptlib.h" |
| 62 | #include "o_time.h" |
| 63 | #include <openssl/asn1.h> |
| 64 | |
| 65 | #if 0 |
| 66 | int i2d_ASN1_UTCTIME(ASN1_UTCTIME *a, unsigned char **pp) |
| 67 | { |
| 68 | #ifndef CHARSET_EBCDIC |
| 69 | return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, |
| 70 | V_ASN1_UTCTIME,V_ASN1_UNIVERSAL)); |
| 71 | #else |
| 72 | /* KLUDGE! We convert to ascii before writing DER */ |
| 73 | int len; |
| 74 | char tmp[24]; |
| 75 | ASN1_STRING x = *(ASN1_STRING *)a; |
| 76 | |
| 77 | len = x.length; |
| 78 | ebcdic2ascii(tmp, x.data, (len >= sizeof tmp) ? sizeof tmp : len); |
| 79 | x.data = tmp; |
| 80 | return i2d_ASN1_bytes(&x, pp, V_ASN1_UTCTIME,V_ASN1_UNIVERSAL); |
| 81 | #endif |
| 82 | } |
| 83 | |
| 84 | |
| 85 | ASN1_UTCTIME *d2i_ASN1_UTCTIME(ASN1_UTCTIME **a, unsigned char **pp, |
| 86 | long length) |
| 87 | { |
| 88 | ASN1_UTCTIME *ret=NULL; |
| 89 | |
| 90 | ret=(ASN1_UTCTIME *)d2i_ASN1_bytes((ASN1_STRING **)a,pp,length, |
| 91 | V_ASN1_UTCTIME,V_ASN1_UNIVERSAL); |
| 92 | if (ret == NULL) |
| 93 | { |
| 94 | ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ERR_R_NESTED_ASN1_ERROR); |
| 95 | return(NULL); |
| 96 | } |
| 97 | #ifdef CHARSET_EBCDIC |
| 98 | ascii2ebcdic(ret->data, ret->data, ret->length); |
| 99 | #endif |
| 100 | if (!ASN1_UTCTIME_check(ret)) |
| 101 | { |
| 102 | ASN1err(ASN1_F_D2I_ASN1_UTCTIME,ASN1_R_INVALID_TIME_FORMAT); |
| 103 | goto err; |
| 104 | } |
| 105 | |
| 106 | return(ret); |
| 107 | err: |
| 108 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) |
| 109 | M_ASN1_UTCTIME_free(ret); |
| 110 | return(NULL); |
| 111 | } |
| 112 | |
| 113 | #endif |
| 114 | |
| 115 | int ASN1_UTCTIME_check(ASN1_UTCTIME *d) |
| 116 | { |
| 117 | static const int min[8]={ 0, 1, 1, 0, 0, 0, 0, 0}; |
| 118 | static const int max[8]={99,12,31,23,59,59,12,59}; |
| 119 | char *a; |
| 120 | int n,i,l,o; |
| 121 | |
| 122 | if (d->type != V_ASN1_UTCTIME) return(0); |
| 123 | l=d->length; |
| 124 | a=(char *)d->data; |
| 125 | o=0; |
| 126 | |
| 127 | if (l < 11) goto err; |
| 128 | for (i=0; i<6; i++) |
| 129 | { |
| 130 | if ((i == 5) && ((a[o] == 'Z') || |
| 131 | (a[o] == '+') || (a[o] == '-'))) |
| 132 | { i++; break; } |
| 133 | if ((a[o] < '0') || (a[o] > '9')) goto err; |
| 134 | n= a[o]-'0'; |
| 135 | if (++o > l) goto err; |
| 136 | |
| 137 | if ((a[o] < '0') || (a[o] > '9')) goto err; |
| 138 | n=(n*10)+ a[o]-'0'; |
| 139 | if (++o > l) goto err; |
| 140 | |
| 141 | if ((n < min[i]) || (n > max[i])) goto err; |
| 142 | } |
| 143 | if (a[o] == 'Z') |
| 144 | o++; |
| 145 | else if ((a[o] == '+') || (a[o] == '-')) |
| 146 | { |
| 147 | o++; |
| 148 | if (o+4 > l) goto err; |
| 149 | for (i=6; i<8; i++) |
| 150 | { |
| 151 | if ((a[o] < '0') || (a[o] > '9')) goto err; |
| 152 | n= a[o]-'0'; |
| 153 | o++; |
| 154 | if ((a[o] < '0') || (a[o] > '9')) goto err; |
| 155 | n=(n*10)+ a[o]-'0'; |
| 156 | if ((n < min[i]) || (n > max[i])) goto err; |
| 157 | o++; |
| 158 | } |
| 159 | } |
| 160 | return(o == l); |
| 161 | err: |
| 162 | return(0); |
| 163 | } |
| 164 | |
| 165 | int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str) |
| 166 | { |
| 167 | ASN1_UTCTIME t; |
| 168 | |
| 169 | t.type=V_ASN1_UTCTIME; |
| 170 | t.length=strlen(str); |
| 171 | t.data=(unsigned char *)str; |
| 172 | if (ASN1_UTCTIME_check(&t)) |
| 173 | { |
| 174 | if (s != NULL) |
| 175 | { |
| 176 | if (!ASN1_STRING_set((ASN1_STRING *)s, |
| 177 | (unsigned char *)str,t.length)) |
| 178 | return 0; |
| 179 | s->type = V_ASN1_UTCTIME; |
| 180 | } |
| 181 | return(1); |
| 182 | } |
| 183 | else |
| 184 | return(0); |
| 185 | } |
| 186 | |
| 187 | ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t) |
| 188 | { |
| 189 | return ASN1_UTCTIME_adj(s, t, 0, 0); |
| 190 | } |
| 191 | |
| 192 | ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, |
| 193 | int offset_day, long offset_sec) |
| 194 | { |
| 195 | char *p; |
| 196 | struct tm *ts; |
| 197 | struct tm data; |
| 198 | size_t len = 20; |
| 199 | |
| 200 | if (s == NULL) |
| 201 | s=M_ASN1_UTCTIME_new(); |
| 202 | if (s == NULL) |
| 203 | return(NULL); |
| 204 | |
| 205 | ts=OPENSSL_gmtime(&t, &data); |
| 206 | if (ts == NULL) |
| 207 | return(NULL); |
| 208 | |
| 209 | if (offset_day || offset_sec) |
| 210 | { |
| 211 | if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec)) |
| 212 | return NULL; |
| 213 | } |
| 214 | |
| 215 | if((ts->tm_year < 50) || (ts->tm_year >= 150)) |
| 216 | return NULL; |
| 217 | |
| 218 | p=(char *)s->data; |
| 219 | if ((p == NULL) || ((size_t)s->length < len)) |
| 220 | { |
| 221 | p=OPENSSL_malloc(len); |
| 222 | if (p == NULL) |
| 223 | { |
| 224 | ASN1err(ASN1_F_ASN1_UTCTIME_ADJ,ERR_R_MALLOC_FAILURE); |
| 225 | return(NULL); |
| 226 | } |
| 227 | if (s->data != NULL) |
| 228 | OPENSSL_free(s->data); |
| 229 | s->data=(unsigned char *)p; |
| 230 | } |
| 231 | |
| 232 | BIO_snprintf(p,len,"%02d%02d%02d%02d%02d%02dZ",ts->tm_year%100, |
| 233 | ts->tm_mon+1,ts->tm_mday,ts->tm_hour,ts->tm_min,ts->tm_sec); |
| 234 | s->length=strlen(p); |
| 235 | s->type=V_ASN1_UTCTIME; |
| 236 | #ifdef CHARSET_EBCDIC_not |
| 237 | ebcdic2ascii(s->data, s->data, s->length); |
| 238 | #endif |
| 239 | return(s); |
| 240 | } |
| 241 | |
| 242 | |
| 243 | int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t) |
| 244 | { |
| 245 | struct tm *tm; |
| 246 | struct tm data; |
| 247 | int offset; |
| 248 | int year; |
| 249 | |
| 250 | #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') |
| 251 | |
| 252 | if (s->data[12] == 'Z') |
| 253 | offset=0; |
| 254 | else |
| 255 | { |
| 256 | offset = g2(s->data+13)*60+g2(s->data+15); |
| 257 | if (s->data[12] == '-') |
| 258 | offset = -offset; |
| 259 | } |
| 260 | |
| 261 | t -= offset*60; /* FIXME: may overflow in extreme cases */ |
| 262 | |
| 263 | tm = OPENSSL_gmtime(&t, &data); |
| 264 | |
| 265 | #define return_cmp(a,b) if ((a)<(b)) return -1; else if ((a)>(b)) return 1 |
| 266 | year = g2(s->data); |
| 267 | if (year < 50) |
| 268 | year += 100; |
| 269 | return_cmp(year, tm->tm_year); |
| 270 | return_cmp(g2(s->data+2) - 1, tm->tm_mon); |
| 271 | return_cmp(g2(s->data+4), tm->tm_mday); |
| 272 | return_cmp(g2(s->data+6), tm->tm_hour); |
| 273 | return_cmp(g2(s->data+8), tm->tm_min); |
| 274 | return_cmp(g2(s->data+10), tm->tm_sec); |
| 275 | #undef g2 |
| 276 | #undef return_cmp |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | #if 0 |
| 283 | time_t ASN1_UTCTIME_get(const ASN1_UTCTIME *s) |
| 284 | { |
| 285 | struct tm tm; |
| 286 | int offset; |
| 287 | |
| 288 | memset(&tm,'\0',sizeof tm); |
| 289 | |
| 290 | #define g2(p) (((p)[0]-'0')*10+(p)[1]-'0') |
| 291 | tm.tm_year=g2(s->data); |
| 292 | if(tm.tm_year < 50) |
| 293 | tm.tm_year+=100; |
| 294 | tm.tm_mon=g2(s->data+2)-1; |
| 295 | tm.tm_mday=g2(s->data+4); |
| 296 | tm.tm_hour=g2(s->data+6); |
| 297 | tm.tm_min=g2(s->data+8); |
| 298 | tm.tm_sec=g2(s->data+10); |
| 299 | if(s->data[12] == 'Z') |
| 300 | offset=0; |
| 301 | else |
| 302 | { |
| 303 | offset=g2(s->data+13)*60+g2(s->data+15); |
| 304 | if(s->data[12] == '-') |
| 305 | offset= -offset; |
| 306 | } |
| 307 | #undef g2 |
| 308 | |
| 309 | return mktime(&tm)-offset*60; /* FIXME: mktime assumes the current timezone |
| 310 | * instead of UTC, and unless we rewrite OpenSSL |
| 311 | * in Lisp we cannot locally change the timezone |
| 312 | * without possibly interfering with other parts |
| 313 | * of the program. timegm, which uses UTC, is |
| 314 | * non-standard. |
| 315 | * Also time_t is inappropriate for general |
| 316 | * UTC times because it may a 32 bit type. */ |
| 317 | } |
| 318 | #endif |