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wireshark
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remove some dependencies of libgssapi 

svn path=/trunk/; revision=13665
This commit is contained in:
Ronnie Sahlberg 2005-03-08 21:13:14 +00:00
parent 95532c9493
commit 176c87d3dd
1 changed files with 52 additions and 4 deletions
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56
epan/dissectors/packet-spnego.c
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@ -503,6 +503,54 @@ arcfour_mic_cksum(krb5_keyblock *key, unsigned usage,
return ret;
}
static int
heimdal_be_to_uint32(u_char *p, guint32 *n)
{
*n = (p[0] <<24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
return 0;
}
/*
* Verify padding of a gss wrapped message and return its length.
*/
static guint32
_gssapi_verify_pad(krb5_data *wrapped_token,
size_t datalen,
size_t *padlen)
{
u_char *pad;
size_t padlength;
int i;
pad = (u_char *)wrapped_token->data + wrapped_token->length - 1;
padlength = *pad;
if (padlength > datalen)
return 1;
for (i = padlength; i > 0 && *pad == padlength; i--, pad--)
;
if (i != 0)
return 2;
*padlen = padlength;
return 0;
}
static guint32
gss_release_buffer
(
krb5_data *buffer
)
{
g_free (buffer->data);
buffer->data = NULL;
buffer->length = 0;
return 0;
}
static int
heimdal_decrypt_arcfour(packet_info *pinfo,
guint32 *minor_status,
@ -559,7 +607,7 @@ heimdal_decrypt_arcfour(packet_info *pinfo,
memset(k6_data, 0, sizeof(k6_data));
}
gssapi_decode_be_om_uint32(SND_SEQ, &seq_number);
heimdal_be_to_uint32(SND_SEQ, &seq_number);
cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
if(cmp){
@ -617,7 +665,7 @@ heimdal_decrypt_arcfour(packet_info *pinfo,
ret = _gssapi_verify_pad(output_message_buffer, datalen, &padlen);
if (ret) {
gss_release_buffer(minor_status, output_message_buffer);
gss_release_buffer(output_message_buffer);
return 9;
}
output_message_buffer->length -= padlen;
@ -629,7 +677,7 @@ heimdal_decrypt_arcfour(packet_info *pinfo,
output_message_buffer->data,
output_message_buffer->length + padlen);
if (ret) {
gss_release_buffer(minor_status, output_message_buffer);
gss_release_buffer(output_message_buffer);
return 10;
}
@ -637,7 +685,7 @@ heimdal_decrypt_arcfour(packet_info *pinfo,
tvb_get_ptr(pinfo->gssapi_wrap_tvb, 16, 8),
8); /* SGN_CKSUM */
if (cmp) {
gss_release_buffer(minor_status, output_message_buffer);
gss_release_buffer(output_message_buffer);
return 11;
}