KRB5_C_MAKE_CHECKSUM(3)

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_data structure holds and encrypted data. There are two public accessable members of krb5_enc_data. enctype that holds the encryption type of the data encrypted and ciphertext that is a krb5_data that might contain the encrypted data.

krb5_c_block_size() returns the blocksize of the encryption type.

krb5_c_decrypt() decrypts input and store the data in output. If ivec is NULL the default initialization vector for that encryption type will be used.

krb5_c_encrypt() encrypts the plaintext in input 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 checksum cksum with the checksum type cksumtype of the data in data. key and usage are used if the checksum is a keyed checksum type. Returns 0 or an error code.

krb5_c_verify_checksum() verifies the checksum of data in cksum that was created with key using the key usage usage. verify is 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 the krb5_checksum structure given type and data. The content of cksum should be freeed with krb5_c_free_checksum_contents().

krb5_c_get_checksum() retrieves the components of the krb5_checksum. structure. data should be free with krb5_free_data(). If some either of data or checksum is not needed for the application, NULL can be passed in.

krb5_c_valid_enctype() returns true if etype is a valid encryption type.

krb5_c_valid_cksumtype() returns true if ctype is a valid checksum type.

krb5_c_is_keyed_cksum() return true if ctype is a keyed checksum type.

krb5_c_is_coll_proof_cksum() returns true if ctype is a collition proof checksum type.

krb5_c_keylengths() return the minimum length ( inlength) bytes needed to create a key and the length ( keylength) of the resulting key for the enctype.

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