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Neither the name of the Institute nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $Id$ .\" .Dd March 20, 2004 .Dt KRB5_ENCRYPT 3 .Os HEIMDAL .Sh NAME .Nm krb5_crypto_getblocksize , .Nm krb5_crypto_getconfoundersize .Nm krb5_crypto_getenctype , .Nm krb5_crypto_getpadsize , .Nm krb5_crypto_overhead , .Nm krb5_decrypt , .Nm krb5_decrypt_EncryptedData , .Nm krb5_decrypt_ivec , .Nm krb5_decrypt_ticket , .Nm krb5_encrypt , .Nm krb5_encrypt_EncryptedData , .Nm krb5_encrypt_ivec , .Nm krb5_enctype_disable , .Nm krb5_enctype_keysize , .Nm krb5_enctype_to_string , .Nm krb5_enctype_valid , .Nm krb5_get_wrapped_length , .Nm krb5_string_to_enctype .Nd "encrypt and decrypt data, set and get encryption type parameters" .Sh LIBRARY Kerberos 5 Library (libkrb5, -lkrb5) .Sh SYNOPSIS .In krb5.h .Ft krb5_error_code .Fo krb5_encrypt .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "unsigned usage" .Fa "void *data" .Fa "size_t len" .Fa "krb5_data *result" .Fc .Ft krb5_error_code .Fo krb5_encrypt_EncryptedData .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "unsigned usage" .Fa "void *data" .Fa "size_t len" .Fa "int kvno" .Fa "EncryptedData *result" .Fc .Ft krb5_error_code .Fo krb5_encrypt_ivec .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "unsigned usage" .Fa "void *data" .Fa "size_t len" .Fa "krb5_data *result" .Fa "void *ivec" .Fc .Ft krb5_error_code .Fo krb5_decrypt .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "unsigned usage" .Fa "void *data" .Fa "size_t len" .Fa "krb5_data *result" .Fc .Ft krb5_error_code .Fo krb5_decrypt_EncryptedData .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "unsigned usage" .Fa "EncryptedData *e" .Fa "krb5_data *result" .Fc .Ft krb5_error_code .Fo krb5_decrypt_ivec .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "unsigned usage" .Fa "void *data" .Fa "size_t len" .Fa "krb5_data *result" .Fa "void *ivec" .Fc .Ft krb5_error_code .Fo krb5_decrypt_ticket .Fa "krb5_context context" .Fa "Ticket *ticket" .Fa "krb5_keyblock *key" .Fa "EncTicketPart *out" .Fa "krb5_flags flags" .Fc .Ft krb5_error_code .Fo krb5_crypto_getblocksize .Fa "krb5_context context" .Fa "size_t *blocksize" .Fc .Ft krb5_error_code .Fo krb5_crypto_getenctype .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "krb5_enctype *enctype" .Fc .Ft krb5_error_code .Fo krb5_crypto_getpadsize .Fa "krb5_context context" .Fa size_t *padsize" .Fc .Ft krb5_error_code .Fo krb5_crypto_getconfoundersize .Fa "krb5_context context" .Fa "krb5_crypto crypto .Fa size_t *confoundersize" .Fc .Ft krb5_error_code .Fo krb5_enctype_keysize .Fa "krb5_context context" .Fa "krb5_enctype type" .Fa "size_t *keysize" .Fc .Ft krb5_error_code .Fo krb5_crypto_overhead .Fa "krb5_context context" .Fa size_t *padsize" .Fc .Ft krb5_error_code .Fo krb5_string_to_enctype .Fa "krb5_context context" .Fa "const char *string" .Fa "krb5_enctype *etype" .Fc .Ft krb5_error_code .Fo krb5_enctype_to_string .Fa "krb5_context context" .Fa "krb5_enctype etype" .Fa "char **string" .Fc .Ft krb5_error_code .Fo krb5_enctype_valid .Fa "krb5_context context" .Fa "krb5_enctype etype" .Fc .Ft void .Fo krb5_enctype_disable .Fa "krb5_context context" .Fa "krb5_enctype etype" .Fc .Ft size_t .Fo krb5_get_wrapped_length .Fa "krb5_context context" .Fa "krb5_crypto crypto" .Fa "size_t data_len" .Fc .Sh DESCRIPTION These functions are used to encrypt and decrypt data. .Pp .Fn krb5_encrypt_ivec puts the encrypted version of .Fa data (of size .Fa len ) in .Fa result . If the encryption type supports using derived keys, .Fa usage should be the appropriate key-usage. .Fa ivec is a pointer to a initial IV, it is modified to the end IV at the end of the round. Ivec should be the size of If .Dv NULL is passed in, the default IV is used. .Fn krb5_encrypt does the same as .Fn krb5_encrypt_ivec but with .Fa ivec being .Dv NULL . .Fn krb5_encrypt_EncryptedData does the same as .Fn krb5_encrypt , but it puts the encrypted data in a .Fa EncryptedData structure instead. If .Fa kvno is not zero, it will be put in the (optional) .Fa kvno field in the .Fa EncryptedData . .Pp .Fn krb5_decrypt_ivec , .Fn krb5_decrypt , and .Fn krb5_decrypt_EncryptedData works similarly. .Pp .Fn krb5_decrypt_ticket decrypts the encrypted part of .Fa ticket with .Fa key . .Fn krb5_decrypt_ticket also verifies the timestamp in the ticket, invalid flag and if the KDC haven't verified the transited path, the transit path. .Pp .Fn krb5_enctype_keysize , .Fn krb5_crypto_getconfoundersize , .Fn krb5_crypto_getblocksize , .Fn krb5_crypto_getenctype , .Fn krb5_crypto_getpadsize , .Fn krb5_crypto_overhead all returns various (sometimes) useful information from a crypto context. .Fn krb5_crypto_overhead is the combination of krb5_crypto_getconfoundersize, krb5_crypto_getblocksize and krb5_crypto_getpadsize and return the maximum overhead size. .Pp .Fn krb5_enctype_to_string converts a encryption type number to a string that can be printable and stored. The strings returned should be freed with .Xr free 3 . .Pp .Fn krb5_string_to_enctype converts a encryption type strings to a encryption type number that can use used for other Kerberos crypto functions. .Pp .Fn krb5_enctype_valid returns 0 if the encrypt is supported and not disabled, otherwise and error code is returned. .Pp .Fn krb5_enctype_disable (globally, for all contextes) disables the .Fa enctype . .Pp .Fn krb5_get_wrapped_length returns the size of an encrypted packet by .Fa crypto of length .Fa data_len . .\" .Sh EXAMPLE .\" .Sh BUGS .Sh SEE ALSO .Xr krb5_create_checksum 3 , .Xr krb5_crypto_init 3