Проект OpenNet: MAN krb5_checksumsize (3) Библиотечные вызовы (FreeBSD и Linux)

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krb5_checksumsize (3)

>> krb5_checksumsize (3) ( FreeBSD man: Библиотечные вызовы )

BSD mandoc
HEIMDAL

NAME

krb5_checksum_is_collision_proof

 
krb5_checksum_is_keyed

 
krb5_checksumsize

 
krb5_create_checksum

 
krb5_verify_checksum

 - creates and verifies checksums

LIBRARY

Kerberos 5 Library (libkrb5, -lkrb5)

SYNOPSIS

#include <krb5.h>
krb5_error_code krb5_create_checksum (krb5_context context krb5_crypto crypto unsigned usage_or_type void *data size_t len Checksum *result);
krb5_error_code krb5_verify_checksum (krb5_context context krb5_crypto crypto krb5_key_usage usage void *data size_t len Checksum *cksum);
krb5_boolean krb5_checksum_is_collision_proof (krb5_context context krb5_cksumtype type);
krb5_boolean krb5_checksum_is_keyed (krb5_context context krb5_cksumtype type);

DESCRIPTION

These functions are used to create and verify checksums. krb5_create_checksum ();
creates a checksum of the specified data, and puts it in Fa result . If Fa crypto is NULL Fa usage_or_type specifies the checksum type to use; it must not be keyed. Otherwise Fa crypto is an encryption context created by krb5_crypto_init (,);
and Fa usage_or_type specifies a key-usage.

krb5_verify_checksum ();
verifies the Fa checksum , against the provided data.

krb5_checksum_is_collision_proof ();
returns true is the specified checksum is collision proof (that it's very unlikely that two strings has the same hash value, and that it's hard to find two strings that has the same hash). Examples of collision proof checksums are MD5, and SHA1, while CRC32 is not.

krb5_checksum_is_keyed ();
returns true if the specified checksum type is keyed (that the hash value is a function of both the data, and a separate key). Examples of keyed hash algorithms are HMAC-SHA1-DES3, and RSA-MD5-DES. The ``plain'' hash functions MD5, and SHA1 are not keyed.

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