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Diffstat (limited to 'crypto/heimdal/lib/gssapi/krb5/prf.c')
-rw-r--r--crypto/heimdal/lib/gssapi/krb5/prf.c93
1 files changed, 49 insertions, 44 deletions
diff --git a/crypto/heimdal/lib/gssapi/krb5/prf.c b/crypto/heimdal/lib/gssapi/krb5/prf.c
index f79c9374a9c7..162a3097099f 100644
--- a/crypto/heimdal/lib/gssapi/krb5/prf.c
+++ b/crypto/heimdal/lib/gssapi/krb5/prf.c
@@ -1,41 +1,39 @@
/*
- * Copyright (c) 2007 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
+ * Copyright (c) 2007 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
*
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
*/
-#include "krb5/gsskrb5_locl.h"
+#include "gsskrb5_locl.h"
-RCSID("$Id: prf.c 21129 2007-06-18 20:28:44Z lha $");
-
-OM_uint32
+OM_uint32 GSSAPI_CALLCONV
_gsskrb5_pseudo_random(OM_uint32 *minor_status,
gss_ctx_id_t context_handle,
int prf_key,
@@ -49,18 +47,21 @@ _gsskrb5_pseudo_random(OM_uint32 *minor_status,
krb5_crypto crypto;
krb5_data input, output;
uint32_t num;
+ OM_uint32 junk;
unsigned char *p;
krb5_keyblock *key = NULL;
+ size_t dol;
if (ctx == NULL) {
*minor_status = 0;
return GSS_S_NO_CONTEXT;
}
- if (desired_output_len <= 0) {
+ if (desired_output_len <= 0 || prf_in->length + 4 < prf_in->length) {
*minor_status = 0;
return GSS_S_FAILURE;
}
+ dol = desired_output_len;
GSSAPI_KRB5_INIT (&context);
@@ -72,14 +73,14 @@ _gsskrb5_pseudo_random(OM_uint32 *minor_status,
_gsskrb5i_get_initiator_subkey(ctx, context, &key);
break;
default:
- _gsskrb5_set_status("unknown kerberos prf_key");
- *minor_status = 0;
+ _gsskrb5_set_status(EINVAL, "unknown kerberos prf_key");
+ *minor_status = EINVAL;
return GSS_S_FAILURE;
}
if (key == NULL) {
- _gsskrb5_set_status("no prf_key found");
- *minor_status = 0;
+ _gsskrb5_set_status(EINVAL, "no prf_key found");
+ *minor_status = EINVAL;
return GSS_S_FAILURE;
}
@@ -90,37 +91,38 @@ _gsskrb5_pseudo_random(OM_uint32 *minor_status,
return GSS_S_FAILURE;
}
- prf_out->value = malloc(desired_output_len);
+ prf_out->value = malloc(dol);
if (prf_out->value == NULL) {
- _gsskrb5_set_status("Out of memory");
+ _gsskrb5_set_status(GSS_KRB5_S_KG_INPUT_TOO_LONG, "Out of memory");
*minor_status = GSS_KRB5_S_KG_INPUT_TOO_LONG;
krb5_crypto_destroy(context, crypto);
return GSS_S_FAILURE;
}
- prf_out->length = desired_output_len;
+ prf_out->length = dol;
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
input.length = prf_in->length + 4;
input.data = malloc(prf_in->length + 4);
if (input.data == NULL) {
- OM_uint32 junk;
- _gsskrb5_set_status("Out of memory");
+ _gsskrb5_set_status(GSS_KRB5_S_KG_INPUT_TOO_LONG, "Out of memory");
*minor_status = GSS_KRB5_S_KG_INPUT_TOO_LONG;
gss_release_buffer(&junk, prf_out);
krb5_crypto_destroy(context, crypto);
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
return GSS_S_FAILURE;
}
- memcpy(((unsigned char *)input.data) + 4, prf_in->value, prf_in->length);
+ memcpy(((uint8_t *)input.data) + 4, prf_in->value, prf_in->length);
num = 0;
p = prf_out->value;
- while(desired_output_len > 0) {
+ while(dol > 0) {
+ size_t tsize;
+
_gsskrb5_encode_om_uint32(num, input.data);
+
ret = krb5_crypto_prf(context, crypto, &input, &output);
if (ret) {
- OM_uint32 junk;
*minor_status = ret;
free(input.data);
gss_release_buffer(&junk, prf_out);
@@ -128,12 +130,15 @@ _gsskrb5_pseudo_random(OM_uint32 *minor_status,
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
return GSS_S_FAILURE;
}
- memcpy(p, output.data, min(desired_output_len, output.length));
+
+ tsize = min(dol, output.length);
+ memcpy(p, output.data, tsize);
p += output.length;
- desired_output_len -= output.length;
+ dol -= tsize;
krb5_data_free(&output);
num++;
}
+ free(input.data);
krb5_crypto_destroy(context, crypto);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 22:15:14 +0000