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ASN.1: Add helper macro to detect string types

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This commit is contained in:
Hanno Becker 2019-09-11 14:15:10 +01:00
parent 819799cfc6
commit cba7122d74
1 changed files with 12 additions and 0 deletions
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12
include/mbedtls/asn1.h
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@ -90,6 +90,18 @@
#define MBEDTLS_ASN1_CONSTRUCTED 0x20 #define MBEDTLS_ASN1_CONSTRUCTED 0x20
#define MBEDTLS_ASN1_CONTEXT_SPECIFIC 0x80 #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 * 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", * ITU X.690 (08/2015), section 8.1 "General rules for encoding",