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NetBSD 6.1.5 - man page for krb5_decrypt (netbsd section 3)

KRB5_ENCRYPT(3) 			     BSD Library Functions Manual			      KRB5_ENCRYPT(3)

NAME
krb5_crypto_getblocksize, krb5_crypto_getconfoundersize krb5_crypto_getenctype, krb5_crypto_getpadsize, krb5_crypto_overhead, krb5_decrypt, krb5_decrypt_EncryptedData, krb5_decrypt_ivec, krb5_decrypt_ticket, krb5_encrypt, krb5_encrypt_EncryptedData, krb5_encrypt_ivec, krb5_enctype_disable, krb5_enctype_keysize, krb5_enctype_to_string, krb5_enctype_valid, krb5_get_wrapped_length, krb5_string_to_enctype -- encrypt and decrypt data, set and get encryption type parameters
LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5)
SYNOPSIS
#include <krb5/krb5.h> krb5_error_code krb5_encrypt(krb5_context context, krb5_crypto crypto, unsigned usage, void *data, size_t len, krb5_data *result); krb5_error_code krb5_encrypt_EncryptedData(krb5_context context, krb5_crypto crypto, unsigned usage, void *data, size_t len, int kvno, EncryptedData *result); krb5_error_code krb5_encrypt_ivec(krb5_context context, krb5_crypto crypto, unsigned usage, void *data, size_t len, krb5_data *result, void *ivec); krb5_error_code krb5_decrypt(krb5_context context, krb5_crypto crypto, unsigned usage, void *data, size_t len, krb5_data *result); krb5_error_code krb5_decrypt_EncryptedData(krb5_context context, krb5_crypto crypto, unsigned usage, EncryptedData *e, krb5_data *result); krb5_error_code krb5_decrypt_ivec(krb5_context context, krb5_crypto crypto, unsigned usage, void *data, size_t len, krb5_data *result, void *ivec); krb5_error_code krb5_decrypt_ticket(krb5_context context, Ticket *ticket, krb5_keyblock *key, EncTicketPart *out, krb5_flags flags); krb5_error_code krb5_crypto_getblocksize(krb5_context context, size_t *blocksize); krb5_error_code krb5_crypto_getenctype(krb5_context context, krb5_crypto crypto, krb5_enctype *enctype); krb5_error_code krb5_crypto_getpadsize(krb5_context context, size_t, *padsize"); krb5_error_code krb5_crypto_getconfoundersize(krb5_context context, krb5_crypto crypto, size_t, *confoundersize"); krb5_error_code krb5_enctype_keysize(krb5_context context, krb5_enctype type, size_t *keysize); krb5_error_code krb5_crypto_overhead(krb5_context context, size_t, *padsize"); krb5_error_code krb5_string_to_enctype(krb5_context context, const char *string, krb5_enctype *etype); krb5_error_code krb5_enctype_to_string(krb5_context context, krb5_enctype etype, char **string); krb5_error_code krb5_enctype_valid(krb5_context context, krb5_enctype etype); void krb5_enctype_disable(krb5_context context, krb5_enctype etype); size_t krb5_get_wrapped_length(krb5_context context, krb5_crypto crypto, size_t data_len);
DESCRIPTION
These functions are used to encrypt and decrypt data. krb5_encrypt_ivec() puts the encrypted version of data (of size len) in result. If the encryption type supports using derived keys, usage should be the appropriate key-usage. ivec is a pointer to a initial IV, it is modi- fied to the end IV at the end of the round. Ivec should be the size of If NULL is passed in, the default IV is used. krb5_encrypt() does the same as krb5_encrypt_ivec() but with ivec being NULL. krb5_encrypt_EncryptedData() does the same as krb5_encrypt(), but it puts the encrypted data in a EncryptedData structure instead. If kvno is not zero, it will be put in the (optional) kvno field in the EncryptedData. krb5_decrypt_ivec(), krb5_decrypt(), and krb5_decrypt_EncryptedData() works similarly. krb5_decrypt_ticket() decrypts the encrypted part of ticket with key. 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. krb5_enctype_keysize(), krb5_crypto_getconfoundersize(), krb5_crypto_getblocksize(), krb5_crypto_getenctype(), krb5_crypto_getpadsize(), krb5_crypto_overhead() all returns various (sometimes) useful information from a crypto context. krb5_crypto_overhead() is the combination of krb5_crypto_getconfoundersize, krb5_crypto_get- blocksize and krb5_crypto_getpadsize and return the maximum overhead size. 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 free(3). krb5_string_to_enctype() converts a encryption type strings to a encryption type number that can use used for other Kerberos crypto functions. krb5_enctype_valid() returns 0 if the encrypt is supported and not disabled, otherwise and error code is returned. krb5_enctype_disable() (globally, for all contextes) disables the enctype. krb5_get_wrapped_length() returns the size of an encrypted packet by crypto of length data_len.
SEE ALSO
krb5_create_checksum(3), krb5_crypto_init(3)
BSD
March 20, 2004 BSD


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