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* lib/crypto/crypto_length.c
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* Copyright 2008 by the Massachusetts Institute of Technology.
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* Export of this software from the United States of America may
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* require a specific license from the United States Government.
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* It is the responsibility of any person or organization contemplating
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* export to obtain such a license before exporting.
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* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
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* distribute this software and its documentation for any purpose and
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* without fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both that copyright notice and
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* this permission notice appear in supporting documentation, and that
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* the name of M.I.T. not be used in advertising or publicity pertaining
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* to distribution of the software without specific, written prior
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* permission. Furthermore if you modify this software you must label
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* your software as modified software and not distribute it in such a
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* fashion that it might be confused with the original M.I.T. software.
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* M.I.T. makes no representations about the suitability of
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* this software for any purpose. It is provided "as is" without express
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* or implied warranty.
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krb5_error_code KRB5_CALLCONV
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krb5_c_crypto_length(krb5_context context,
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const struct krb5_keytypes *ktp = NULL;
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for (i = 0; i < krb5_enctypes_length; i++) {
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if (krb5_enctypes_list[i].etype == enctype) {
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ktp = &krb5_enctypes_list[i];
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if (ktp == NULL || ktp->aead == NULL) {
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return KRB5_BAD_ENCTYPE;
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case KRB5_CRYPTO_TYPE_EMPTY:
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case KRB5_CRYPTO_TYPE_SIGN_ONLY:
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case KRB5_CRYPTO_TYPE_DATA:
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*size = (size_t)~0; /* match Heimdal */
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case KRB5_CRYPTO_TYPE_HEADER:
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case KRB5_CRYPTO_TYPE_PADDING:
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case KRB5_CRYPTO_TYPE_TRAILER:
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case KRB5_CRYPTO_TYPE_CHECKSUM:
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ret = ktp->aead->crypto_length(ktp->aead, ktp->enc, ktp->hash, type, size);
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krb5_error_code KRB5_CALLCONV
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krb5_c_padding_length(krb5_context context,
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unsigned int *pad_length)
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const struct krb5_keytypes *ktp = NULL;
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for (i = 0; i < krb5_enctypes_length; i++) {
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if (krb5_enctypes_list[i].etype == enctype) {
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ktp = &krb5_enctypes_list[i];
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if (ktp == NULL || ktp->aead == NULL) {
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return KRB5_BAD_ENCTYPE;
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return krb5int_c_padding_length(ktp->aead, ktp->enc, ktp->hash, data_length, pad_length);
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krb5_error_code KRB5_CALLCONV
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krb5_c_crypto_length_iov(krb5_context context,
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krb5_enctype enctype,
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krb5_crypto_iov *data,
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krb5_error_code ret = 0;
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const struct krb5_keytypes *ktp = NULL;
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unsigned int data_length = 0, pad_length;
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krb5_crypto_iov *padding = NULL;
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* XXX need to rejig internal interface so we can accurately
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* report variable header lengths
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for (i = 0; i < (size_t)krb5_enctypes_length; i++) {
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if (krb5_enctypes_list[i].etype == enctype) {
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ktp = &krb5_enctypes_list[i];
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if (ktp == NULL || ktp->aead == NULL) {
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return KRB5_BAD_ENCTYPE;
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for (i = 0; i < num_data; i++) {
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krb5_crypto_iov *iov = &data[i];
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switch (iov->flags) {
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case KRB5_CRYPTO_TYPE_DATA:
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data_length += iov->data.length;
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case KRB5_CRYPTO_TYPE_PADDING:
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case KRB5_CRYPTO_TYPE_HEADER:
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case KRB5_CRYPTO_TYPE_TRAILER:
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case KRB5_CRYPTO_TYPE_CHECKSUM:
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ret = ktp->aead->crypto_length(ktp->aead, ktp->enc, ktp->hash, iov->flags, &iov->data.length);
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case KRB5_CRYPTO_TYPE_EMPTY:
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case KRB5_CRYPTO_TYPE_SIGN_ONLY:
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ret = krb5int_c_padding_length(ktp->aead, ktp->enc, ktp->hash, data_length, &pad_length);
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if (pad_length != 0 && padding == NULL)
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padding->data.length = pad_length;
added
removed
src/lib/crypto/crypto_length.c
