KRB5_C_MAKE_CHECKSUM(3) | Library Functions Manual | 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/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 accessible 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 collision 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)

Nov 17, 2006 | NetBSD 11.0