+{
+ return ASN1_TIME_adj(s, t, 0, 0);
+}
+
+ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t,
+ int offset_day, long offset_sec)
+{
+ struct tm *ts;
+ struct tm data;
+
+ ts = OPENSSL_gmtime(&t, &data);
+ if (ts == NULL) {
+ ASN1err(ASN1_F_ASN1_TIME_ADJ, ASN1_R_ERROR_GETTING_TIME);
+ return NULL;
+ }
+ if (offset_day || offset_sec) {
+ if (!OPENSSL_gmtime_adj(ts, offset_day, offset_sec))
+ return NULL;
+ }
+ if ((ts->tm_year >= 50) && (ts->tm_year < 150))
+ return ASN1_UTCTIME_adj(s, t, offset_day, offset_sec);
+ return ASN1_GENERALIZEDTIME_adj(s, t, offset_day, offset_sec);
+}
+
+int ASN1_TIME_check(const ASN1_TIME *t)
+{
+ if (t->type == V_ASN1_GENERALIZEDTIME)
+ return ASN1_GENERALIZEDTIME_check(t);
+ else if (t->type == V_ASN1_UTCTIME)
+ return ASN1_UTCTIME_check(t);
+ return 0;
+}
+
+/* Convert an ASN1_TIME structure to GeneralizedTime */
+ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t,
+ ASN1_GENERALIZEDTIME **out)
+{
+ ASN1_GENERALIZEDTIME *ret;
+ char *str;
+ int newlen;
+
+ if (!ASN1_TIME_check(t))
+ return NULL;
+
+ if (out == NULL || *out == NULL) {
+ if ((ret = ASN1_GENERALIZEDTIME_new()) == NULL)
+ return NULL;
+ if (out)
+ *out = ret;
+ } else
+ ret = *out;
+
+ /* If already GeneralizedTime just copy across */
+ if (t->type == V_ASN1_GENERALIZEDTIME) {
+ if (!ASN1_STRING_set(ret, t->data, t->length))
+ return NULL;
+ return ret;
+ }
+
+ /* grow the string */
+ if (!ASN1_STRING_set(ret, NULL, t->length + 2))
+ return NULL;
+ /* ASN1_STRING_set() allocated 'len + 1' bytes. */
+ newlen = t->length + 2 + 1;
+ str = (char *)ret->data;
+ /* Work out the century and prepend */
+ if (t->data[0] >= '5')
+ BUF_strlcpy(str, "19", newlen);
+ else
+ BUF_strlcpy(str, "20", newlen);
+
+ BUF_strlcat(str, (char *)t->data, newlen);
+
+ return ret;
+}
+
+int ASN1_TIME_set_string(ASN1_TIME *s, const char *str)
+{
+ ASN1_TIME t;
+
+ t.length = strlen(str);
+ t.data = (unsigned char *)str;
+ t.flags = 0;
+
+ t.type = V_ASN1_UTCTIME;
+
+ if (!ASN1_TIME_check(&t)) {
+ t.type = V_ASN1_GENERALIZEDTIME;
+ if (!ASN1_TIME_check(&t))
+ return 0;
+ }
+
+ if (s && !ASN1_STRING_copy((ASN1_STRING *)s, (ASN1_STRING *)&t))
+ return 0;
+
+ return 1;
+}
+
+static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t)
+{
+ if (t == NULL) {
+ time_t now_t;
+ time(&now_t);
+ if (OPENSSL_gmtime(&now_t, tm))
+ return 1;
+ return 0;
+ }
+
+ if (t->type == V_ASN1_UTCTIME)
+ return asn1_utctime_to_tm(tm, t);
+ else if (t->type == V_ASN1_GENERALIZEDTIME)
+ return asn1_generalizedtime_to_tm(tm, t);
+
+ return 0;
+}
+
+int ASN1_TIME_diff(int *pday, int *psec,
+ const ASN1_TIME *from, const ASN1_TIME *to)
+{
+ struct tm tm_from, tm_to;
+ if (!asn1_time_to_tm(&tm_from, from))
+ return 0;
+ if (!asn1_time_to_tm(&tm_to, to))
+ return 0;
+ return OPENSSL_gmtime_diff(pday, psec, &tm_from, &tm_to);
+}