scan_asn1derlength(3)scan_asn1derlength(3)NAME
scan_asn1derlength - decode an unsigned integer from ASN.1 DER length
encoding
SYNTAX
#include <scan.h>
size_t scan_asn1derlength(const char *src,size_t len,unsigned long long
*dest);
DESCRIPTION
scan_asn1derlength decodes an unsigned integer in ASN.1 DER length
encoding from a memory area holding binary data. It writes the decode
value in dest and returns the number of bytes it read from src.
scan_asn1derlength never reads more than len bytes from src. If the
sequence is longer than that, or the memory area contains an invalid
sequence, scan_asn1derlength returns 0 and does not touch dest.
The length of the longest ASN.1 DER length sequence is 128 bytes. In
practice the largest sequence is sizeof(*dest)+1.
SEE ALSOfmt_asn1derlength(3)scan_asn1derlength(3)
