NAME¶
fmt_asn1dertag - encode unsigned integer like ASN.1 DER tag
SYNTAX¶
#include <fmt.h>
size_t
fmt_asn1dertag(char *
dest,unsigned long long
source);
DESCRIPTION¶
fmt_asn1dertag encodes an unsigned integer using the ASN.1 DER for encoding tag.
This takes one byte for every 7 bits in the number.
If
dest equals FMT_LEN (i.e. is NULL), fmt_asn1dertag returns the number
of bytes it would have written.
For convenience, fmt.h defines the integer FMT_ASN1TAG to be big enough to
contain every possible fmt_asn1dertag output.
SEE ALSO¶
scan_asn1dertag(3)