示例#1
0
文件: aes.c 项目: mrogers950/krb5
krb5_error_code
krb5int_aes_decrypt(krb5_key key, const krb5_data *ivec,
                    krb5_crypto_iov *data, size_t num_data)
{
    int    ret = 0;
    size_t input_length, nblocks;

    input_length = iov_total_length(data, num_data, FALSE);
    nblocks = (input_length + BLOCK_SIZE - 1) / BLOCK_SIZE;
    if (nblocks == 1) {
        if (input_length != BLOCK_SIZE)
            return KRB5_BAD_MSIZE;
        ret = cbc_decr(key, ivec, data, num_data);
    } else if (nblocks > 1) {
        ret = cts_decr(key, ivec, data, num_data, input_length);
    }

    return ret;
}
示例#2
0
文件: des3.c 项目: b055man/krb5
static krb5_error_code
validate(krb5_key key, const krb5_data *ivec, const krb5_crypto_iov *data,
         size_t num_data, krb5_boolean *empty)
{
    size_t input_length;

    /* Is our key the correct length? */
    if (key->keyblock.length != DES3_KEY_SIZE)
        return(KRB5_BAD_KEYSIZE);

    /* Is our input a multiple of the block size, and
       the IV the correct length? */
    input_length = iov_total_length(data, num_data, FALSE);

    if ((input_length%DES_BLOCK_SIZE) != 0 
        || (ivec != NULL && ivec->length != DES_BLOCK_SIZE))
        return(KRB5_BAD_MSIZE);

    *empty = (input_length == 0);
    return 0;
}