asn1_error_code
k5_asn1_decode_generaltime(const unsigned char *asn1, size_t len,
time_t *time_out)
{
const char *s = (char *)asn1;
struct tm ts;
time_t t;
*time_out = 0;
if (len != 15)
return ASN1_BAD_LENGTH;
/* Time encoding: YYYYMMDDhhmmssZ */
if (s[14] != 'Z')
return ASN1_BAD_FORMAT;
if (memcmp(s, "19700101000000Z", 15) == 0) {
*time_out = 0;
return 0;
}
#define c2i(c) ((c) - '0')
ts.tm_year = 1000 * c2i(s[0]) + 100 * c2i(s[1]) + 10 * c2i(s[2]) +
c2i(s[3]) - 1900;
ts.tm_mon = 10 * c2i(s[4]) + c2i(s[5]) - 1;
ts.tm_mday = 10 * c2i(s[6]) + c2i(s[7]);
ts.tm_hour = 10 * c2i(s[8]) + c2i(s[9]);
ts.tm_min = 10 * c2i(s[10]) + c2i(s[11]);
ts.tm_sec = 10 * c2i(s[12]) + c2i(s[13]);
ts.tm_isdst = -1;
t = krb5int_gmt_mktime(&ts);
if (t == -1)
return ASN1_BAD_TIMEFORMAT;
*time_out = t;
return 0;
}
static krb5_error_code
getepochtime(char *strtime, krb5_timestamp *epochtime)
{
struct tm tme;
memset(&tme, 0, sizeof(tme));
if (strptime(strtime,"%Y%m%d%H%M%SZ", &tme) == NULL) {
*epochtime = 0;
return EINVAL;
}
*epochtime = krb5int_gmt_mktime(&tme);
return 0;
}
asn1_error_code
asn1_decode_generaltime(asn1buf *buf, time_t *val)
{
setup();
char *s;
struct tm ts;
time_t t;
tag(ASN1_GENERALTIME);
if (length != 15) return ASN1_BAD_LENGTH;
retval = asn1buf_remove_charstring(buf,15,&s);
if (retval) return retval;
/* Time encoding: YYYYMMDDhhmmssZ */
if (s[14] != 'Z') {
free(s);
return ASN1_BAD_FORMAT;
}
if (s[0] == '1' && !memcmp("19700101000000Z", s, 15)) {
t = 0;
free(s);
goto done;
}
#define c2i(c) ((c)-'0')
ts.tm_year = 1000*c2i(s[0]) + 100*c2i(s[1]) + 10*c2i(s[2]) + c2i(s[3])
- 1900;
ts.tm_mon = 10*c2i(s[4]) + c2i(s[5]) - 1;
ts.tm_mday = 10*c2i(s[6]) + c2i(s[7]);
ts.tm_hour = 10*c2i(s[8]) + c2i(s[9]);
ts.tm_min = 10*c2i(s[10]) + c2i(s[11]);
ts.tm_sec = 10*c2i(s[12]) + c2i(s[13]);
ts.tm_isdst = -1;
t = krb5int_gmt_mktime(&ts);
free(s);
if (t == -1) return ASN1_BAD_TIMEFORMAT;
done:
*val = t;
cleanup();
}
