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-rw-r--r--source4/heimdal/lib/gssapi/arcfour.c31
-rw-r--r--source4/heimdal/lib/gssapi/arcfour.h9
-rwxr-xr-xsource4/heimdal/lib/gssapi/cfx.c34
-rwxr-xr-xsource4/heimdal/lib/gssapi/cfx.h5
-rw-r--r--source4/heimdal/lib/gssapi/gssapi.h9
-rw-r--r--source4/heimdal/lib/gssapi/wrap.c95
6 files changed, 159 insertions, 24 deletions
diff --git a/source4/heimdal/lib/gssapi/arcfour.c b/source4/heimdal/lib/gssapi/arcfour.c
index 5edcee08ec..52bb2ecf1b 100644
--- a/source4/heimdal/lib/gssapi/arcfour.c
+++ b/source4/heimdal/lib/gssapi/arcfour.c
@@ -326,6 +326,37 @@ _gssapi_verify_mic_arcfour(OM_uint32 * minor_status,
}
OM_uint32
+_gssapi_wrap_size_arcfour(OM_uint32 * minor_status,
+ const gss_ctx_id_t context_handle,
+ int conf_req_flag,
+ gss_qop_t qop_req,
+ OM_uint32 req_input_size,
+ OM_uint32 * output_size,
+ OM_uint32 * padlen,
+ krb5_keyblock *key)
+{
+ size_t len, total_len, datalen;
+ *padlen = 0;
+ datalen = req_input_size;
+ len = GSS_ARCFOUR_WRAP_TOKEN_SIZE;
+ /* if GSS_C_DCE_STYLE is in use:
+ * - we only need to encapsulate the WRAP token
+ * - we should not add padding
+ */
+ if (!(context_handle->flags & GSS_C_DCE_STYLE)) {
+ datalen += 1 /* padding */;
+ len += datalen;
+ }
+ _gssapi_encap_length(len, &len, &total_len, GSS_KRB5_MECHANISM);
+ if (context_handle->flags & GSS_C_DCE_STYLE) {
+ total_len += datalen;
+ }
+
+ *output_size = total_len;
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
_gssapi_wrap_arcfour(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
int conf_req_flag,
diff --git a/source4/heimdal/lib/gssapi/arcfour.h b/source4/heimdal/lib/gssapi/arcfour.h
index 5acfcad29d..0406b64b09 100644
--- a/source4/heimdal/lib/gssapi/arcfour.h
+++ b/source4/heimdal/lib/gssapi/arcfour.h
@@ -70,5 +70,14 @@ OM_uint32 _gssapi_verify_mic_arcfour(OM_uint32 *minor_status,
gss_qop_t *qop_state,
krb5_keyblock *key,
char *type);
+OM_uint32
+_gssapi_wrap_size_arcfour(OM_uint32 * minor_status,
+ const gss_ctx_id_t context_handle,
+ int conf_req_flag,
+ gss_qop_t qop_req,
+ OM_uint32 req_input_size,
+ OM_uint32 * output_size,
+ OM_uint32 * padlen,
+ krb5_keyblock *key);
#endif /* GSSAPI_ARCFOUR_H_ */
diff --git a/source4/heimdal/lib/gssapi/cfx.c b/source4/heimdal/lib/gssapi/cfx.c
index 75b6a8bcfa..1cc510d6fc 100755
--- a/source4/heimdal/lib/gssapi/cfx.c
+++ b/source4/heimdal/lib/gssapi/cfx.c
@@ -48,7 +48,8 @@ wrap_length_cfx(krb5_crypto crypto,
size_t input_length,
size_t *output_length,
size_t *cksumsize,
- u_int16_t *padlength)
+ u_int16_t *padlength,
+ size_t *padsize)
{
krb5_error_code ret;
krb5_cksumtype type;
@@ -68,18 +69,17 @@ wrap_length_cfx(krb5_crypto crypto,
}
if (conf_req_flag) {
- size_t padsize;
/* Header is concatenated with data before encryption */
input_length += sizeof(gss_cfx_wrap_token_desc);
- ret = krb5_crypto_getpadsize(gssapi_krb5_context, crypto, &padsize);
+ ret = krb5_crypto_getpadsize(gssapi_krb5_context, crypto, padsize);
if (ret) {
return ret;
}
if (padsize > 1) {
/* XXX check this */
- *padlength = padsize - (input_length % padsize);
+ *padlength = *padsize - (input_length % *padsize);
}
/* We add the pad ourselves (noted here for completeness only) */
@@ -90,6 +90,7 @@ wrap_length_cfx(krb5_crypto crypto,
} else {
/* Checksum is concatenated with data */
*output_length += input_length + *cksumsize;
+ *padsize = 0;
}
assert(*output_length > input_length);
@@ -101,13 +102,15 @@ OM_uint32 _gssapi_wrap_size_cfx(OM_uint32 *minor_status,
const gss_ctx_id_t context_handle,
int conf_req_flag,
gss_qop_t qop_req,
- OM_uint32 req_output_size,
- OM_uint32 *max_input_size,
+ OM_uint32 req_input_size,
+ OM_uint32 *output_len,
+ OM_uint32 *padsize,
krb5_keyblock *key)
{
krb5_error_code ret;
krb5_crypto crypto;
- u_int16_t padlength;
+ u_int16_t pad_length;
+ size_t pad_size;
size_t output_length, cksumsize;
ret = krb5_crypto_init(gssapi_krb5_context, key, 0, &crypto);
@@ -118,8 +121,8 @@ OM_uint32 _gssapi_wrap_size_cfx(OM_uint32 *minor_status,
}
ret = wrap_length_cfx(crypto, conf_req_flag,
- req_output_size,
- &output_length, &cksumsize, &padlength);
+ req_input_size,
+ &output_length, &cksumsize, &pad_length, &pad_size);
if (ret != 0) {
gssapi_krb5_set_error_string();
*minor_status = ret;
@@ -127,13 +130,8 @@ OM_uint32 _gssapi_wrap_size_cfx(OM_uint32 *minor_status,
return GSS_S_FAILURE;
}
- if (output_length < req_output_size) {
- *max_input_size = (req_output_size - output_length);
- *max_input_size -= padlength;
- } else {
- /* Should this return an error? */
- *max_input_size = 0;
- }
+ *output_len = output_length;
+ *padsize = pad_size;
krb5_crypto_destroy(gssapi_krb5_context, crypto);
@@ -201,7 +199,7 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status,
krb5_data cipher;
size_t wrapped_len, cksumsize;
u_int16_t padlength, rrc = 0;
- OM_uint32 seq_number;
+ OM_uint32 seq_number, padsize;
u_char *p;
ret = krb5_crypto_init(gssapi_krb5_context, key, 0, &crypto);
@@ -213,7 +211,7 @@ OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status,
ret = wrap_length_cfx(crypto, conf_req_flag,
input_message_buffer->length,
- &wrapped_len, &cksumsize, &padlength);
+ &wrapped_len, &cksumsize, &padlength, &padsize);
if (ret != 0) {
gssapi_krb5_set_error_string();
*minor_status = ret;
diff --git a/source4/heimdal/lib/gssapi/cfx.h b/source4/heimdal/lib/gssapi/cfx.h
index a587cb9d97..d9bdd9da19 100755
--- a/source4/heimdal/lib/gssapi/cfx.h
+++ b/source4/heimdal/lib/gssapi/cfx.h
@@ -66,8 +66,9 @@ OM_uint32 _gssapi_wrap_size_cfx(OM_uint32 *minor_status,
const gss_ctx_id_t context_handle,
int conf_req_flag,
gss_qop_t qop_req,
- OM_uint32 req_output_size,
- OM_uint32 *max_input_size,
+ OM_uint32 req_input_size,
+ OM_uint32 *output_len,
+ OM_uint32 *padlen,
krb5_keyblock *key);
OM_uint32 _gssapi_wrap_cfx(OM_uint32 *minor_status,
diff --git a/source4/heimdal/lib/gssapi/gssapi.h b/source4/heimdal/lib/gssapi/gssapi.h
index 4ee988b020..4bf6780daa 100644
--- a/source4/heimdal/lib/gssapi/gssapi.h
+++ b/source4/heimdal/lib/gssapi/gssapi.h
@@ -628,6 +628,15 @@ OM_uint32 gss_inquire_context (
int * /*open_context*/
);
+OM_uint32 gsskrb5_wrap_size (
+ OM_uint32 * /*minor_status*/,
+ const gss_ctx_id_t /*context_handle*/,
+ int /*conf_req_flag*/,
+ gss_qop_t /*qop_req*/,
+ OM_uint32 /*req_input_size*/,
+ OM_uint32 * /*output_size*/
+ );
+
OM_uint32 gss_wrap_size_limit (
OM_uint32 * /*minor_status*/,
const gss_ctx_id_t /*context_handle*/,
diff --git a/source4/heimdal/lib/gssapi/wrap.c b/source4/heimdal/lib/gssapi/wrap.c
index bdb09e633b..50249d2d7f 100644
--- a/source4/heimdal/lib/gssapi/wrap.c
+++ b/source4/heimdal/lib/gssapi/wrap.c
@@ -120,7 +120,7 @@ gss_krb5_get_subkey(const gss_ctx_id_t context_handle,
}
static OM_uint32
-sub_wrap_size (
+sub_wrap_size_limit (
OM_uint32 req_output_size,
OM_uint32 * max_input_size,
int blocksize,
@@ -156,6 +156,8 @@ gss_wrap_size_limit (
krb5_keyblock *key;
OM_uint32 ret;
krb5_keytype keytype;
+ OM_uint32 output_size;
+ OM_uint32 blocksize;
ret = gss_krb5_get_subkey(context_handle, &key);
if (ret) {
@@ -167,17 +169,102 @@ gss_wrap_size_limit (
switch (keytype) {
case KEYTYPE_DES :
+ ret = sub_wrap_size_limit(req_output_size, max_input_size, 8, 22);
+ break;
+ case KEYTYPE_DES3 :
+ ret = sub_wrap_size_limit(req_output_size, max_input_size, 8, 34);
+ break;
case KEYTYPE_ARCFOUR:
case KEYTYPE_ARCFOUR_56:
- ret = sub_wrap_size(req_output_size, max_input_size, 8, 22);
+ ret = _gssapi_wrap_size_arcfour(minor_status, context_handle,
+ conf_req_flag, qop_req,
+ req_output_size, &output_size,
+ &blocksize, key);
+
+ if (output_size > req_output_size) {
+ *max_input_size = req_output_size - (output_size - req_output_size);
+ (*max_input_size) &= (~(OM_uint32)(blocksize - 1));
+ } else {
+ *max_input_size = 0;
+ }
+ break;
+ default :
+ ret = _gssapi_wrap_size_cfx(minor_status, context_handle,
+ conf_req_flag, qop_req,
+ req_output_size, &output_size,
+ &blocksize, key);
+ if (output_size > req_output_size) {
+ *max_input_size = req_output_size - (output_size - req_output_size);
+ (*max_input_size) &= (~(OM_uint32)(blocksize - 1));
+ } else {
+ *max_input_size = 0;
+ }
+ break;
+ }
+ krb5_free_keyblock (gssapi_krb5_context, key);
+ *minor_status = 0;
+ return ret;
+}
+
+static OM_uint32
+sub_wrap_size (
+ OM_uint32 req_input_size,
+ OM_uint32 * output_size,
+ int blocksize,
+ int extrasize
+ )
+{
+ size_t len, total_len, padlength, datalen;
+
+ padlength = blocksize - (req_input_size % blocksize);
+ datalen = req_input_size + padlength + 8;
+ len = datalen + extrasize;
+ gssapi_krb5_encap_length (len, &len, &total_len, GSS_KRB5_MECHANISM);
+
+ *output_size = total_len;
+
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32
+gsskrb5_wrap_size (
+ OM_uint32 * minor_status,
+ const gss_ctx_id_t context_handle,
+ int conf_req_flag,
+ gss_qop_t qop_req,
+ OM_uint32 req_input_size,
+ OM_uint32 * output_size
+ )
+{
+ krb5_keyblock *key;
+ OM_uint32 ret, padlen;
+ krb5_keytype keytype;
+
+ ret = gss_krb5_get_subkey(context_handle, &key);
+ if (ret) {
+ gssapi_krb5_set_error_string ();
+ *minor_status = ret;
+ return GSS_S_FAILURE;
+ }
+ krb5_enctype_to_keytype (gssapi_krb5_context, key->keytype, &keytype);
+
+ switch (keytype) {
+ case KEYTYPE_DES :
+ ret = sub_wrap_size(req_input_size, output_size, 8, 22);
break;
case KEYTYPE_DES3 :
- ret = sub_wrap_size(req_output_size, max_input_size, 8, 34);
+ ret = sub_wrap_size(req_input_size, output_size, 8, 34);
+ break;
+ case KEYTYPE_ARCFOUR:
+ case KEYTYPE_ARCFOUR_56:
+ ret = _gssapi_wrap_size_arcfour(minor_status, context_handle,
+ conf_req_flag, qop_req,
+ req_input_size, output_size, &padlen, key);
break;
default :
ret = _gssapi_wrap_size_cfx(minor_status, context_handle,
conf_req_flag, qop_req,
- req_output_size, max_input_size, key);
+ req_input_size, output_size, &padlen, key);
break;
}
krb5_free_keyblock (gssapi_krb5_context, key);
generated by cgit (git 2.34.1) at 2024-12-26 00:32:33 +0000