This code was dropped upstream in 34604c6b5b7735384fa7937f3373a2a80bb50ccf
so i't's not clear if it's really used for 1.3.x or not, but it is compiled,
so apply the trivial fix to use getters for the opaque type.
--- a/src/sslinfo.c
+++ b/src/sslinfo.c
@@ -55,15 +55,15 @@ static int get_days_remaining(ASN1_UTCTIME *tm)
     /* Fail if the time isn't a valid ASN.1 UTCTIME; RFC3280 mandates
      * that the seconds digits are present even though ASN.1
      * doesn't. */
-    if (tm->length < 11 || !ASN1_UTCTIME_check(tm))
+    if (ASN1_STRING_get_length(tm) < 11 || !ASN1_UTCTIME_check(tm))
         return 0;
 
-    exp.tm_year = DIGIT2NUM(tm->data);
-    exp.tm_mon  = DIGIT2NUM(tm->data + 2) - 1;
-    exp.tm_mday = DIGIT2NUM(tm->data + 4) + 1;
-    exp.tm_hour = DIGIT2NUM(tm->data + 6);
-    exp.tm_min  = DIGIT2NUM(tm->data + 8);
-    exp.tm_sec  = DIGIT2NUM(tm->data + 10);
+    exp.tm_year = DIGIT2NUM(ASN1_STRING_get0_data(tm));
+    exp.tm_mon  = DIGIT2NUM(ASN1_STRING_get0_data(tm) + 2) - 1;
+    exp.tm_mday = DIGIT2NUM(ASN1_STRING_get0_data(tm) + 4) + 1;
+    exp.tm_hour = DIGIT2NUM(ASN1_STRING_get0_data(tm) + 6);
+    exp.tm_min  = DIGIT2NUM(ASN1_STRING_get0_data(tm) + 8);
+    exp.tm_sec  = DIGIT2NUM(ASN1_STRING_get0_data(tm) + 10);
 
     if (exp.tm_year <= 50)
         exp.tm_year += 100;