NAME¶

krb5_c_block_size,krb5_c_decrypt,krb5_c_encrypt,krb5_c_encrypt_length,krb5_c_enctype_compare,krb5_c_get_checksum,krb5_c_is_coll_proof_cksum,krb5_c_is_keyed_cksum,krb5_c_keylength,krb5_c_make_checksum,krb5_c_make_random_key,krb5_c_set_checksum,krb5_c_valid_cksumtype,krb5_c_valid_enctype,krb5_c_verify_checksum,krb5_c_checksum_length—Kerberos 5 crypto API

LIBRARY¶

Kerberos 5 Library (libkrb5, -lkrb5)

SYNOPSIS¶

#include<krb5.h>
krb5_error_code
krb5_c_block_size(krb5_context context,krb5_enctype enctype,size_t *blocksize); krb5_error_code
krb5_c_decrypt(krb5_context context,const krb5_keyblock key,krb5_keyusage usage,const krb5_data *ivec,krb5_enc_data *input,krb5_data *output); krb5_error_code
krb5_c_encrypt(krb5_context context,const krb5_keyblock *key,krb5_keyusage usage,const krb5_data *ivec,const krb5_data *input,krb5_enc_data *output); krb5_error_code
krb5_c_encrypt_length(krb5_context context,krb5_enctype enctype,size_t inputlen,size_t *length); krb5_error_code
krb5_c_enctype_compare(krb5_context context,krb5_enctype e1,krb5_enctype e2,krb5_boolean *similar); krb5_error_code
krb5_c_make_random_key(krb5_context context,krb5_enctype enctype,krb5_keyblock *random_key); krb5_error_code
krb5_c_make_checksum(krb5_context context,krb5_cksumtype cksumtype,const krb5_keyblock *key,krb5_keyusage usage,const krb5_data *input,krb5_checksum *cksum); krb5_error_code
krb5_c_verify_checksum(krb5_context context,const krb5_keyblock *key,krb5_keyusage usage,const krb5_data *data,const krb5_checksum *cksum,krb5_boolean *valid); krb5_error_code
krb5_c_checksum_length(krb5_context context,krb5_cksumtype cksumtype,size_t *length); krb5_error_code
krb5_c_get_checksum(krb5_context context, const krb5_checksum *cksum,krb5_cksumtype *type,krb5_data **data); krb5_error_code
krb5_c_set_checksum(krb5_context context, krb5_checksum *cksum,krb5_cksumtype type,const krb5_data *data); krb5_boolean
krb5_c_valid_enctype(krb5_enctype,etype"); krb5_boolean
krb5_c_valid_cksumtype(krb5_cksumtype ctype); krb5_boolean
krb5_c_is_coll_proof_cksum(krb5_cksumtype ctype); krb5_boolean
krb5_c_is_keyed_cksum(krb5_cksumtype ctype); krb5_error_code
krb5_c_keylengths(krb5_context context,krb5_enctype enctype,size_t *inlength,size_t *keylength);

DESCRIPTION¶

The functions starting with krb5_c are compat functions with MIT kerberos. The krb5_enc_datastructure holds and encrypted data.There are two public accessable members of krb5_enc_data.enctypethat holds the encryption type of the data encrypted and ciphertext that is a krb5_datathat might contain the encrypted data. krb5_c_block_size()returns the blocksize of the encryption type. krb5_c_decrypt()decryptsinputand store the data in output.IfivecisNULLthe default initialization vector for that encryption type will be used. krb5_c_encrypt()encrypts the plaintext ininput and store the ciphertext in output. krb5_c_encrypt_length()returns the length the encrypted data given the plaintext length. krb5_c_enctype_compare()compares to encryption types and returns if they use compatible encryption key types. krb5_c_make_checksum()creates a checksumcksum with the checksum type cksumtype of the data in data.keyandusageare used if the checksum is a keyed checksum type. Returns 0 or an error code. krb5_c_verify_checksum()verifies the checksumofdataincksumthat was created with keyusing the key usageusage.verifyis set to non-zero if the checksum verifies correctly and zero if not. Returns 0 or an error code. krb5_c_checksum_length()returns the length of the checksum. krb5_c_set_checksum()sets thekrb5_checksum structure given type and data.The content ofcksumshould be freeed withkrb5_c_free_checksum_contents(). krb5_c_get_checksum()retrieves the components of thekrb5_checksum.structure.datashould be free with krb5_free_data().If some either ofdataorchecksumis not needed for the application, NULLcan be passed in. krb5_c_valid_enctype()returns true ifetype is a valid encryption type. krb5_c_valid_cksumtype()returns true ifctype is a valid checksum type. krb5_c_is_keyed_cksum()return true ifctype is a keyed checksum type. krb5_c_is_coll_proof_cksum()returns true ifctype is a collision proof checksum type. krb5_c_keylengths()return the minimum length(inlength)bytes needed to create a key and thelength (keylength)of the resulting keyfor theenctype.

SEE ALSO¶

krb5(3),krb5_create_checksum(3),krb5_free_data(3),kerberos(8)