--- a/libs/tcpd/libcouriertls.c	2026-11-06 23:43:01.853919241 +0100
+++ b/libs/tcpd/libcouriertls.c	2026-11-06 23:59:14.319522929 +0100
@@ -1847,12 +1847,12 @@
 	struct tm tm;
 	int offset;
 
-	if (asn1Time == NULL || asn1Time->length < 13)
+	if (asn1Time == NULL || ASN1_STRING_length(asn1Time) < 13)
 		return 0;
 
 	memset(&tm, 0, sizeof(tm));
 
-#define N2(n)	((asn1Time->data[n]-'0')*10 + asn1Time->data[(n)+1]-'0')
+#define N2(n)	((ASN1_STRING_get0_data(asn1Time)[n]-'0')*10 + ASN1_STRING_get0_data(asn1Time)[(n)+1]-'0')
 
 #define CPY(f,n) (tm.f=N2(n))
 
@@ -1870,14 +1870,14 @@
 
 	offset=0;
 
-	if (asn1Time->data[12] != 'Z')
+	if (ASN1_STRING_get0_data(asn1Time)[12] != 'Z')
 	{
-		if (asn1Time->length < 17)
+		if (ASN1_STRING_length(asn1Time) < 17)
 			return 0;
 
 		offset=N2(13)*3600+N2(15)*60;
 
-		if (asn1Time->data[12] == '-')
+		if (ASN1_STRING_get0_data(asn1Time)[12] == '-')
 			offset= -offset;
 	}