NE_STRHASH(3)

NAME
ne_strhash, ne_vstrhash - string hash interface

SYNOPSIS

#include <ne_string.h>

char *ne_strhash(unsigned int flags, ...);

char *ne_vstrhash(unsigned int flags, va_list ap);

DESCRIPTION

The ne_strhash and ne_vstrhash functions can be used to create hashes. The varargs argument list must be const char * strings followed by a NULL terminator. The flags argument must select exactly one hash algorithm from the list below, which can be optionally bitwise-ORed with one of the formatting option. The hash is calculated for the concatenation of the argument list, without separators.

  Hash algorithms

The following hash algorithms are available:

NE_HASH_MD5
    MD5

NE_HASH_SHA1
    SHA-1

NE_HASH_SHA256
    SHA-256 (SHA-2)

NE_HASH_SHA512
    SHA-512 (SHA-2)

NE_HASH_SHA512_256
    SHA-512/256 (SHA-2)

  Formatting options

By default, the hash is returned as a hexadecimal lower-case character string. The following formatting options are available:

NE_HASH_COLON
    colon-separated hex pairs, e.g. "aa:11:22..."

NE_HASH_SPACE
    space-separated hex pairs, e.g. "aa 11 22..."

RETURN VALUE

The return value is the ASCII hexadecimal representation of the hash as a malloc-allocated, NUL-terminated string, or NULL if the hash cannot be created. The string length is determined by the hash algorithm (and formatting options used). Support for hash algorithms is specific to the SSL toolkit with which neon is compiled. Some systems will further restrict hash availability at runtime, e.g. due to FIPS mode.

HISTORY

ne_strhash and ne_vstrhash are available in neon 0.32.0 and later.

The NE_HASH_SHA1 flag is available in neon 0.37.0 and later.

COPYRIGHT
Copyright © 2001-2026 Joe Orton