oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

handle protocol version 2

Browse Source 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@11349 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
2002-09-03 20:03:46 +00:00
parent d9a1ec3c10
commit 76f0ff261e
4 changed files with 182 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
appl/rsh/common.c
View File

@@ -36,10 +36,36 @@ RCSID("$Id$");
#if defined(KRB4) || defined(KRB5)
#ifdef KRB5
int key_usage = 1026;
void *ivec_in[2];
void *ivec_out[2];
void
init_ivecs(int client)
{
size_t blocksize;
krb5_crypto_block_size(context, crypto, &blocksize);
ivec_in[0] = malloc(blocksize);
memset(ivec_in[0], client, blocksize);
ivec_in[1] = malloc(blocksize);
memset(ivec_in[1], 2 | client, blocksize);
ivec_out[0] = malloc(blocksize);
memset(ivec_out[0], !client, blocksize);
ivec_out[1] = malloc(blocksize);
memset(ivec_out[1], 2 | !client, blocksize);
}
#endif
ssize_t
do_read (int fd,
void *buf,
size_t sz)
do_read (int fd, void *buf, size_t sz, void *ivec)
{
if (do_encrypt) {
#ifdef KRB4
@@ -61,7 +87,11 @@ do_read (int fd,
len = ntohl(len);
if (len > sz)
abort ();
outer_len = krb5_get_wrapped_length (context, crypto, len);
/* ivec will be non null for protocol version 2 */
if(ivec != NULL)
outer_len = krb5_get_wrapped_length (context, crypto, len + 4);
else
outer_len = krb5_get_wrapped_length (context, crypto, len);
edata = malloc (outer_len);
if (edata == NULL)
errx (1, "malloc: cannot allocate %u bytes", outer_len);
@@ -69,13 +99,22 @@ do_read (int fd,
if (ret <= 0)
return ret;
status = krb5_decrypt(context, crypto, KRB5_KU_OTHER_ENCRYPTED,
edata, outer_len, &data);
status = krb5_decrypt_ivec(context, crypto, key_usage,
edata, outer_len, &data, ivec);
free (edata);
if (status)
errx (1, "%s", krb5_get_err_text (context, status));
memcpy (buf, data.data, len);
krb5_err (context, 1, status, "decrypting data");
if(ivec != NULL) {
unsigned long l;
if(data.length < len + 4)
errx (1, "data received is too short");
_krb5_get_int(data.data, &l, 4);
if(l != len)
errx (1, "inconsistency in received data");
memcpy (buf, (unsigned char *)data.data+4, len);
} else
memcpy (buf, data.data, len);
krb5_data_free (&data);
return len;
} else
@@ -86,7 +125,7 @@ do_read (int fd,
}
ssize_t
do_write (int fd, void *buf, size_t sz)
do_write (int fd, void *buf, size_t sz, void *ivec)
{
if (do_encrypt) {
#ifdef KRB4
@@ -98,20 +137,27 @@ do_write (int fd, void *buf, size_t sz)
if(auth_method == AUTH_KRB5) {
krb5_error_code status;
krb5_data data;
u_int32_t len;
unsigned char len[4];
int ret;
status = krb5_encrypt(context, crypto, KRB5_KU_OTHER_ENCRYPTED,
buf, sz, &data);
_krb5_put_int(len, sz, 4);
if(ivec != NULL) {
unsigned char *tmp = malloc(sz + 4);
if(tmp == NULL)
err(1, "malloc");
_krb5_put_int(tmp, sz, 4);
memcpy(tmp + 4, buf, sz);
status = krb5_encrypt_ivec(context, crypto, key_usage,
tmp, sz + 4, &data, ivec);
free(tmp);
} else
status = krb5_encrypt_ivec(context, crypto, key_usage,
buf, sz, &data, ivec);
if (status)
errx (1, "%s", krb5_get_err_text(context, status));
krb5_err(context, 1, status, "encrypting data");
assert (krb5_get_wrapped_length (context, crypto,
sz) == data.length);
len = htonl(sz);
ret = krb5_net_write (context, &fd, &len, 4);
ret = krb5_net_write (context, &fd, len, 4);
if (ret != 4)
return ret;
ret = krb5_net_write (context, &fd, data.data, data.length);