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Move _gssapi_wrap_size_arcfour here.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@18194 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2006-10-02 09:14:14 +00:00
parent a888cae1f8
commit 0ed8497583
1 changed files with 77 additions and 1 deletions
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78
lib/gssapi/krb5/arcfour.c
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@@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2003 - 2005 Kungliga Tekniska H<>gskolan * Copyright (c) 2003 - 2006 Kungliga Tekniska H<>gskolan
* (Royal Institute of Technology, Stockholm, Sweden). * (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved. * All rights reserved.
* *
@@ -667,3 +667,79 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
*minor_status = 0; *minor_status = 0;
return GSS_S_COMPLETE; return GSS_S_COMPLETE;
} }
static OM_uint32
max_wrap_length_arcfour(const gsskrb5_ctx ctx,
krb5_crypto crypto,
size_t input_length,
OM_uint32 *max_input_size)
{
/*
* if GSS_C_DCE_STYLE is in use:
* - we only need to encapsulate the WRAP token
* However, since this is a fixed since, we just
*/
if (ctx->flags & GSS_C_DCE_STYLE) {
size_t len, total_len;
len = GSS_ARCFOUR_WRAP_TOKEN_SIZE;
_gssapi_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
if (input_length < len)
*max_input_size = 0;
else
*max_input_size = input_length - len;
} else {
size_t extrasize = GSS_ARCFOUR_WRAP_TOKEN_SIZE;
size_t blocksize = 8;
size_t len, total_len;
len = 8 + input_length + blocksize + extrasize;
_gsskrb5_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
total_len -= input_length; /* token length */
if (total_len < input_length) {
*max_input_size = (input_length - total_len);
(*max_input_size) &= (~(OM_uint32)(blocksize - 1));
} else {
*max_input_size = 0;
}
}
return GSS_S_COMPLETE;
}
OM_uint32
_gssapi_wrap_size_arcfour(OM_uint32 *minor_status,
const gsskrb5_ctx ctx,
int conf_req_flag,
gss_qop_t qop_req,
OM_uint32 req_output_size,
OM_uint32 *max_input_size,
krb5_keyblock *key)
{
krb5_error_code ret;
krb5_crypto crypto;
ret = krb5_crypto_init(_gsskrb5_context, key, 0, &crypto);
if (ret != 0) {
_gsskrb5_set_error_string();
*minor_status = ret;
return GSS_S_FAILURE;
}
ret = max_wrap_length_arcfour(ctx, crypto,
req_output_size, max_input_size);
if (ret != 0) {
_gsskrb5_set_error_string();
*minor_status = ret;
krb5_crypto_destroy(_gsskrb5_context, crypto);
return GSS_S_FAILURE;
}
krb5_crypto_destroy(_gsskrb5_context, crypto);
return GSS_S_COMPLETE;
}