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Implement `gssapi_krb5_verify_8003_checksum'.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@4654 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
1998-03-23 22:45:35 +00:00
parent e972b391e1
commit c309115820
2 changed files with 84 additions and 2 deletions
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43
lib/gssapi/krb5/8003.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 1997 Kungliga Tekniska H<>gskolan
* Copyright (c) 1997, 1998 Kungliga Tekniska H<>gskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
@@ -50,6 +50,13 @@ encode_om_uint32(OM_uint32 n, u_char *p)
return 0;
}
static krb5_error_code
decode_om_uint32(u_char *p, OM_uint32 *n)
{
*n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
return 0;
}
static krb5_error_code
hash_input_chan_bindings (const gss_channel_bindings_t b,
u_char *p)
@@ -114,3 +121,37 @@ gssapi_krb5_create_8003_checksum (
return 0;
}
krb5_error_code
gssapi_krb5_verify_8003_checksum(
const gss_channel_bindings_t input_chan_bindings,
Checksum *cksum,
OM_uint32 *flags)
{
unsigned char hash[16];
unsigned char *p;
OM_uint32 length;
/* XXX should handle checksums > 24 bytes */
if(cksum->cksumtype != 0x8003 || cksum->checksum.length != 24)
return GSS_S_BAD_BINDINGS;
p = cksum->checksum.data;
decode_om_uint32(p, &length);
if(length != sizeof(hash))
return GSS_S_FAILURE;
p += 4;
if (input_chan_bindings != GSS_C_NO_CHANNEL_BINDINGS) {
if(hash_input_chan_bindings(input_chan_bindings, hash) != 0)
return GSS_S_FAILURE;
if(memcmp(hash, p, sizeof(hash)) != 0)
return GSS_S_FAILURE;
}
p += sizeof(hash);
decode_om_uint32(p, flags);
return 0;
}