ASN.1: Add helper macro to detect string types
#define MBEDTLS_ASN1_CONSTRUCTED 0x20
#define MBEDTLS_ASN1_CONTEXT_SPECIFIC 0x80
+/* Slightly smaller way to check if tag is a string tag
+ * compared to canonical implementation. */
+#define MBEDTLS_ASN1_IS_STRING_TAG( tag ) \
+ ( ( tag ) < 32u && ( \
+ ( ( 1u << ( tag ) ) & ( ( 1u << MBEDTLS_ASN1_BMP_STRING ) | \
+ ( 1u << MBEDTLS_ASN1_UTF8_STRING ) | \
+ ( 1u << MBEDTLS_ASN1_T61_STRING ) | \
+ ( 1u << MBEDTLS_ASN1_IA5_STRING ) | \
+ ( 1u << MBEDTLS_ASN1_UNIVERSAL_STRING ) | \
+ ( 1u << MBEDTLS_ASN1_PRINTABLE_STRING ) | \
+ ( 1u << MBEDTLS_ASN1_BIT_STRING ) ) ) != 0 ) )
+
/*
* Bit masks for each of the components of an ASN.1 tag as specified in
* ITU X.690 (08/2015), section 8.1 "General rules for encoding",
