Problem - Kevin Tafuro

memcpy(in_data.data, inbuf, inlen);
spc_add_padding((unsigned char *)in_data.data + inlen, inlen, blksz);
if (krb5_c_encrypt_length(ctx, key->enctype, in_data.length, outlen)) {
free(in_data.data);
return 0;
}
out_data.magic = KV5M_ENC_DATA;
out_data.enctype = key->enctype;
out_data.kvno = 0;
out_data.ciphertext.magic = KV5M_ENCRYPT_BLOCK;
out_data.ciphertext.length = *outlen;
out_data.ciphertext.data = malloc(*outlen);
if (!out_data.ciphertext.data) {
free(in_data.data);
return 0;
}
if (krb5_c_encrypt(ctx, key, 0, 0, &in_data, &out_data)) {
free(in_data.data);
return 0;
}
*outbuf = out_data.ciphertext.data;
free(in_data.data);
return 1;
#else
int result;
void *tmp;
size_t blksz, newlen;
krb5_data edata;
krb5_crypto crypto;
if (krb5_crypto_init(ctx, key, 0, &crypto) != 0) return 0;
if (krb5_crypto_getblocksize(ctx, crypto, &blksz)) {
krb5_crypto_destroy(ctx, crypto);
return 0;
}
if (!(inlen % blksz)) newlen = inlen + blksz;
else newlen = ((inlen + blksz - 1) / blksz) * blksz;
if (!(tmp = malloc(newlen))) {
krb5_crypto_destroy(ctx, crypto);
return 0;
}
memcpy(tmp, inbuf, inlen);
spc_add_padding((unsigned char *)tmp + inlen, inlen, blksz);
if (!krb5_encrypt(ctx, crypto, 0, tmp, inlen, &edata)) {
if ((*outbuf = malloc(edata.length)) != 0) {
result = 1;
memcpy(*outbuf, edata.data, edata.length);
*outlen = edata.length;
This is the Title of the Book, eMatter Edition
Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.
Using Kerberos Encryption | 473