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  man pages->OpenBSD man pages -> krb5_verify_checksum (3)              



NAME    [Toc]    [Back]

     krb5_checksum_is_collision_proof, krb5_checksum_is_keyed,
     krb5_checksumsize,                     krb5_create_checksum,
krb5_verify_checksum - creates
     and verifies checksums

LIBRARY    [Toc]    [Back]

     Kerberos 5 Library (libkrb5, -lkrb5)

SYNOPSIS    [Toc]    [Back]

     #include <krb5.h>

     krb5_create_checksum(krb5_context    context,    krb5_crypto
             unsigned usage_or_type, void *data, size_t len,
             Checksum *result);

     krb5_verify_checksum(krb5_context    context,    krb5_crypto
             krb5_key_usage   usage,   void  *data,  size_t  len,
Checksum *cksum);

     krb5_checksum_is_collision_proof(krb5_context context,
             krb5_cksumtype type);

     krb5_checksum_is_keyed(krb5_context context,  krb5_cksumtype

DESCRIPTION    [Toc]    [Back]

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

     krb5_verify_checksum()  verifies  the  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,
  The ``plain'' hash functions MD5, and SHA1 are not

SEE ALSO    [Toc]    [Back]

     krb5_crypto_init(3), krb5_encrypt(3)

 HEIMDAL                               April       7,        1999
[ Back ]
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