Add mbedtls_asn1_write_len() support for 3 and 4 byte lengths
As a consequence also adds coverage for reading 3 and 4 byte lengths
(which were not covered before)
diff --git a/tests/suites/test_suite_asn1write.data b/tests/suites/test_suite_asn1write.data
index 3518ed9..c2a78b1 100644
--- a/tests/suites/test_suite_asn1write.data
+++ b/tests/suites/test_suite_asn1write.data
@@ -67,14 +67,26 @@
ASN.1 Write / Read Length #5 (Len = 255, buffer too small)
mbedtls_asn1_write_len:255:"81FF":1:MBEDTLS_ERR_ASN1_BUF_TOO_SMALL
-ASN.1 Write / Read Length #6 (Len = 256, long form)
-mbedtls_asn1_write_len:256:"820100":3:3
+ASN.1 Write / Read Length #6 (Len = 258, byte order)
+mbedtls_asn1_write_len:258:"820102":3:3
-ASN.1 Write / Read Length #7 (Len = 65535, max supported length)
+ASN.1 Write / Read Length #7 (Len = 65535, long form)
mbedtls_asn1_write_len:65535:"82FFFF":3:3
ASN.1 Write / Read Length #8 (Len = 65535, buffer too small)
mbedtls_asn1_write_len:65535:"82FFFF":2:MBEDTLS_ERR_ASN1_BUF_TOO_SMALL
-ASN.1 Write / Read Length #9 (Len = 65536, not supported)
-mbedtls_asn1_write_len:65536:"":0:MBEDTLS_ERR_ASN1_INVALID_LENGTH
+ASN.1 Write / Read Length #9 (Len = 66051, byte order)
+mbedtls_asn1_write_len:66051:"83010203":4:4
+
+ASN.1 Write / Read Length #10 (Len = 16777215, long form)
+mbedtls_asn1_write_len:16777215:"83FFFFFF":4:4
+
+ASN.1 Write / Read Length #11 (Len = 16777215, buffer too small)
+mbedtls_asn1_write_len:16777215:"83FFFFFF":3:MBEDTLS_ERR_ASN1_BUF_TOO_SMALL
+
+ASN.1 Write / Read Length #12 (Len = 16909060, byte order)
+mbedtls_asn1_write_len:16909060:"8401020304":5:5
+
+ASN.1 Write / Read Length #12 (Len = 16909060, buffer too small)
+mbedtls_asn1_write_len:16909060:"8401020304":4:MBEDTLS_ERR_ASN1_BUF_TOO_SMALL