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Heimdal Kerberos 5 cryptography functions(3)		      HeimdalKerberos5library		      Heimdal Kerberos 5 cryptography functions(3)

NAME
Heimdal Kerberos 5 cryptography functions - Functions KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_enctype_valid (krb5_context context, krb5_enctype etype) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_cksumtype_to_enctype (krb5_context context, krb5_cksumtype ctype, krb5_enctype *etype) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_encrypt_iov_ivec (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov *data, int num_data, void *ivec) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_decrypt_iov_ivec (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov *data, unsigned int num_data, void *ivec) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_create_checksum_iov (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov *data, unsigned int num_data, krb5_cksumtype *type) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_verify_checksum_iov (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov *data, unsigned int num_data, krb5_cksumtype *type) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_init (krb5_context context, const krb5_keyblock *key, krb5_enctype etype, krb5_crypto *crypto) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_destroy (krb5_context context, krb5_crypto crypto) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getblocksize (krb5_context context, krb5_crypto crypto, size_t *blocksize) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getenctype (krb5_context context, krb5_crypto crypto, krb5_enctype *enctype) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getpadsize (krb5_context context, krb5_crypto crypto, size_t *padsize) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getconfoundersize (krb5_context context, krb5_crypto crypto, size_t *confoundersize) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_enctype_disable (krb5_context context, krb5_enctype enctype) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_enctype_enable (krb5_context context, krb5_enctype enctype) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_allow_weak_crypto (krb5_context context, krb5_boolean enable) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_random_to_key (krb5_context context, krb5_enctype type, const void *data, size_t size, krb5_keyblock *key) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_fx_cf2 (krb5_context context, const krb5_crypto crypto1, const krb5_crypto crypto2, krb5_data *pepper1, krb5_data *pepper2, krb5_enctype enctype, krb5_keyblock *res) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_generate_subkey_extended (krb5_context context, const krb5_keyblock *key, krb5_enctype etype, krb5_keyblock **subkey) KRB5_LIB_FUNCTION void KRB5_LIB_CALL krb5_keyblock_zero (krb5_keyblock *keyblock) KRB5_LIB_FUNCTION void KRB5_LIB_CALL krb5_free_keyblock_contents (krb5_context context, krb5_keyblock *keyblock) KRB5_LIB_FUNCTION void KRB5_LIB_CALL krb5_free_keyblock (krb5_context context, krb5_keyblock *keyblock) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_copy_keyblock_contents (krb5_context context, const krb5_keyblock *inblock, krb5_keyblock *to) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_copy_keyblock (krb5_context context, const krb5_keyblock *inblock, krb5_keyblock **to) KRB5_LIB_FUNCTION krb5_enctype KRB5_LIB_CALL krb5_keyblock_get_enctype (const krb5_keyblock *block) KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_keyblock_init (krb5_context context, krb5_enctype type, const void *data, size_t size, krb5_keyblock *key) Detailed Description Function Documentation KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_allow_weak_crypto (krb5_context context, krb5_boolean enable) Enable or disable all weak encryption types Parameters: context Kerberos 5 context enable true to enable, false to disable Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_cksumtype_to_enctype (krb5_context context, krb5_cksumtype ctype, krb5_enctype * etype) Return the coresponding encryption type for a checksum type. Parameters: context Kerberos context ctype The checksum type to get the result enctype for etype The returned encryption, when the matching etype is not found, etype is set to ETYPE_NULL. Returns: Return an error code for an failure or 0 on success. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_copy_keyblock (krb5_context context, const krb5_keyblock * inblock, krb5_keyblock ** to) Copy a keyblock, free the output keyblock with krb5_free_keyblock(). Parameters: context a Kerberos 5 context inblock the key to copy to the output key. Returns: 0 on success or a Kerberos 5 error code KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_copy_keyblock_contents (krb5_context context, const krb5_keyblock * inblock, krb5_keyblock * to) Copy a keyblock, free the output keyblock with krb5_free_keyblock_contents(). Parameters: context a Kerberos 5 context inblock the key to copy to the output key. Returns: 0 on success or a Kerberos 5 error code KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_create_checksum_iov (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov * data, unsigned int num_data, krb5_cksumtype * type) Create a Kerberos message checksum. Parameters: context Kerberos context crypto Kerberos crypto context usage Key usage for this buffer data array of buffers to process num_data length of array type output data Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_destroy (krb5_context context, krb5_crypto crypto) Free a crypto context created by krb5_crypto_init(). Parameters: context Kerberos context crypto crypto context to free Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_fx_cf2 (krb5_context context, const krb5_crypto crypto1, const krb5_crypto crypto2, krb5_data * pepper1, krb5_data * pepper2, krb5_enctype enctype, krb5_keyblock * res) The FX-CF2 key derivation function, used in FAST and preauth framework. Parameters: context Kerberos 5 context crypto1 first key to combine crypto2 second key to combine pepper1 factor to combine with first key to garante uniqueness pepper2 factor to combine with second key to garante uniqueness enctype the encryption type of the resulting key res allocated key, free with krb5_free_keyblock_contents() Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getblocksize (krb5_context context, krb5_crypto crypto, size_t * blocksize) Return the blocksize used algorithm referenced by the crypto context Parameters: context Kerberos context crypto crypto context to query blocksize the resulting blocksize Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getconfoundersize (krb5_context context, krb5_crypto crypto, size_t * confoundersize) Return the confounder size used by the crypto context Parameters: context Kerberos context crypto crypto context to query confoundersize the returned confounder size Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getenctype (krb5_context context, krb5_crypto crypto, krb5_enctype * enctype) Return the encryption type used by the crypto context Parameters: context Kerberos context crypto crypto context to query enctype the resulting encryption type Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_getpadsize (krb5_context context, krb5_crypto crypto, size_t * padsize) Return the padding size used by the crypto context Parameters: context Kerberos context crypto crypto context to query padsize the return padding size Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_crypto_init (krb5_context context, const krb5_keyblock * key, krb5_enctype etype, krb5_crypto * crypto) Create a crypto context used for all encryption and signature operation. The encryption type to use is taken from the key, but can be overridden with the enctype parameter. This can be useful for encryptions types which is compatiable (DES for example). To free the crypto context, use krb5_crypto_destroy(). Parameters: context Kerberos context key the key block information with all key data etype the encryption type crypto the resulting crypto context Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_decrypt_iov_ivec (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov * data, unsigned int num_data, void * ivec) Inline decrypt a Kerberos message. Parameters: context Kerberos context crypto Kerberos crypto context usage Key usage for this buffer data array of buffers to process num_data length of array ivec initial cbc/cts vector Returns: Return an error code or 0. 1. KRB5_CRYPTO_TYPE_HEADER 2. one KRB5_CRYPTO_TYPE_DATA and array [0,...] of KRB5_CRYPTO_TYPE_SIGN_ONLY in any order, however the receiver have to aware of the order. KRB5_CRYPTO_TYPE_SIGN_ONLY is commonly used unencrypoted protocol headers and trailers. The output data will be of same size as the input data or shorter. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_encrypt_iov_ivec (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov * data, int num_data, void * ivec) Inline encrypt a kerberos message Parameters: context Kerberos context crypto Kerberos crypto context usage Key usage for this buffer data array of buffers to process num_data length of array ivec initial cbc/cts vector Returns: Return an error code or 0. Kerberos encrypted data look like this: 1. KRB5_CRYPTO_TYPE_HEADER 2. array [1,...] KRB5_CRYPTO_TYPE_DATA and array [0,...] KRB5_CRYPTO_TYPE_SIGN_ONLY in any order, however the receiver have to aware of the order. KRB5_CRYPTO_TYPE_SIGN_ONLY is commonly used headers and trailers. 3. KRB5_CRYPTO_TYPE_PADDING, at least on padsize long if padsize > 1 4. KRB5_CRYPTO_TYPE_TRAILER KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_enctype_disable (krb5_context context, krb5_enctype enctype) Disable encryption type Parameters: context Kerberos 5 context enctype encryption type to disable Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_enctype_enable (krb5_context context, krb5_enctype enctype) Enable encryption type Parameters: context Kerberos 5 context enctype encryption type to enable Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_enctype_valid (krb5_context context, krb5_enctype etype) Check if a enctype is valid, return 0 if it is. Parameters: context Kerberos context etype enctype to check if its valid or not Returns: Return an error code for an failure or 0 on success (enctype valid). KRB5_LIB_FUNCTION void KRB5_LIB_CALL krb5_free_keyblock (krb5_context context, krb5_keyblock * keyblock) Free a keyblock, also zero out the content of the keyblock, uses krb5_free_keyblock_contents() to free the content. Parameters: context a Kerberos 5 context keyblock keyblock to free, NULL is valid argument KRB5_LIB_FUNCTION void KRB5_LIB_CALL krb5_free_keyblock_contents (krb5_context context, krb5_keyblock * keyblock) Free a keyblock's content, also zero out the content of the keyblock. Parameters: context a Kerberos 5 context keyblock keyblock content to free, NULL is valid argument KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_generate_subkey_extended (krb5_context context, const krb5_keyblock * key, krb5_enctype etype, krb5_keyblock ** subkey) Generate subkey, from keyblock Parameters: context kerberos context key session key etype encryption type of subkey, if ETYPE_NULL, use key's enctype subkey returned new, free with krb5_free_keyblock(). Returns: 0 on success or a Kerberos 5 error code KRB5_LIB_FUNCTION krb5_enctype KRB5_LIB_CALL krb5_keyblock_get_enctype (const krb5_keyblock * block) Get encryption type of a keyblock. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_keyblock_init (krb5_context context, krb5_enctype type, const void * data, size_t size, krb5_keyblock * key) Fill in `key' with key data of type `enctype' from `data' of length `size'. Key should be freed using krb5_free_keyblock_contents(). Returns: 0 on success or a Kerberos 5 error code KRB5_LIB_FUNCTION void KRB5_LIB_CALL krb5_keyblock_zero (krb5_keyblock * keyblock) Zero out a keyblock Parameters: keyblock keyblock to zero out KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_random_to_key (krb5_context context, krb5_enctype type, const void * data, size_t size, krb5_keyblock * key) Converts the random bytestring to a protocol key according to Kerberos crypto frame work. It may be assumed that all the bits of the input string are equally random, even though the entropy present in the random source may be limited. Parameters: context Kerberos 5 context type the enctype resulting key will be of data input random data to convert to a key size size of input random data, at least krb5_enctype_keysize() long key key, output key, free with krb5_free_keyblock_contents() Returns: Return an error code or 0. KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL krb5_verify_checksum_iov (krb5_context context, krb5_crypto crypto, unsigned usage, krb5_crypto_iov * data, unsigned int num_data, krb5_cksumtype * type) Verify a Kerberos message checksum. Parameters: context Kerberos context crypto Kerberos crypto context usage Key usage for this buffer data array of buffers to process num_data length of array type return checksum type if not NULL Returns: Return an error code or 0. Version 1.5.2 11 Jan 2012 Heimdal Kerberos 5 cryptography functions(3)

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