Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 348 insertions, 0 deletions

diff --git a/third_party/heimdal/lib/krb5/rd_cred.c b/third_party/heimdal/lib/krb5/rd_cred.c
new file mode 100644
index 0000000..f8d5736
--- /dev/null
+++ b/third_party/heimdal/lib/krb5/rd_cred.c
@@ -0,0 +1,348 @@
+/*
+ * Copyright (c) 1997 - 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:
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#include "krb5_locl.h"
+
+static krb5_error_code
+compare_addrs(krb5_context context,
+	      krb5_address *a,
+	      krb5_address *b,
+	      const char *message)
+{
+    char a_str[64], b_str[64];
+    size_t len;
+
+    if(krb5_address_compare (context, a, b))
+	return 0;
+
+    krb5_print_address (a, a_str, sizeof(a_str), &len);
+    krb5_print_address (b, b_str, sizeof(b_str), &len);
+    krb5_set_error_message(context, KRB5KRB_AP_ERR_BADADDR,
+			   "%s: %s != %s", message, b_str, a_str);
+    return KRB5KRB_AP_ERR_BADADDR;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rd_cred(krb5_context context,
+	     krb5_auth_context auth_context,
+	     krb5_data *in_data,
+	     krb5_creds ***ret_creds,
+	     krb5_replay_data *outdata)
+{
+    krb5_error_code ret;
+    size_t len;
+    KRB_CRED cred;
+    EncKrbCredPart enc_krb_cred_part;
+    krb5_data enc_krb_cred_part_data;
+    krb5_crypto crypto;
+    size_t i;
+
+    memset(&enc_krb_cred_part, 0, sizeof(enc_krb_cred_part));
+    krb5_data_zero(&enc_krb_cred_part_data);
+
+    if ((auth_context->flags &
+	 (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) &&
+	outdata == NULL)
+	return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */
+
+    *ret_creds = NULL;
+
+    ret = decode_KRB_CRED(in_data->data, in_data->length,
+			  &cred, &len);
+    if(ret) {
+	krb5_clear_error_message(context);
+	return ret;
+    }
+
+    if (cred.pvno != 5) {
+	ret = KRB5KRB_AP_ERR_BADVERSION;
+	krb5_clear_error_message (context);
+	goto out;
+    }
+
+    if (cred.msg_type != krb_cred) {
+	ret = KRB5KRB_AP_ERR_MSG_TYPE;
+	krb5_clear_error_message (context);
+	goto out;
+    }
+
+    if (cred.enc_part.etype == ETYPE_NULL) {
+	/* DK: MIT GSS-API Compatibility */
+	enc_krb_cred_part_data.length = cred.enc_part.cipher.length;
+	enc_krb_cred_part_data.data   = cred.enc_part.cipher.data;
+    } else {
+	/* Try both subkey and session key.
+	 *
+	 * RFC4120 claims we should use the session key, but Heimdal
+	 * before 0.8 used the remote subkey if it was send in the
+	 * auth_context.
+	 */
+
+	if (auth_context->remote_subkey) {
+	    ret = krb5_crypto_init(context, auth_context->remote_subkey,
+				   0, &crypto);
+	    if (ret)
+		goto out;
+
+	    ret = krb5_decrypt_EncryptedData(context,
+					     crypto,
+					     KRB5_KU_KRB_CRED,
+					     &cred.enc_part,
+					     &enc_krb_cred_part_data);
+
+	    krb5_crypto_destroy(context, crypto);
+	}
+
+	/*
+	 * If there was not subkey, or we failed using subkey,
+	 * retry using the session key
+	 */
+	if (auth_context->remote_subkey == NULL || ret == KRB5KRB_AP_ERR_BAD_INTEGRITY)
+	{
+
+	    ret = krb5_crypto_init(context, auth_context->keyblock,
+				   0, &crypto);
+
+	    if (ret)
+		goto out;
+
+	    ret = krb5_decrypt_EncryptedData(context,
+					     crypto,
+					     KRB5_KU_KRB_CRED,
+					     &cred.enc_part,
+					     &enc_krb_cred_part_data);
+
+	    krb5_crypto_destroy(context, crypto);
+	}
+	if (ret)
+	    goto out;
+    }
+
+    ret = decode_EncKrbCredPart(enc_krb_cred_part_data.data,
+				enc_krb_cred_part_data.length,
+				&enc_krb_cred_part,
+				&len);
+    if (enc_krb_cred_part_data.data != cred.enc_part.cipher.data)
+	krb5_data_free(&enc_krb_cred_part_data);
+    if (ret) {
+	krb5_set_error_message(context, ret,
+			       N_("Failed to decode "
+				  "encrypte credential part", ""));
+	goto out;
+    }
+
+    /* check sender address */
+
+    if (enc_krb_cred_part.s_address
+	&& auth_context->remote_address
+	&& auth_context->remote_port) {
+	krb5_address *a;
+
+	ret = krb5_make_addrport (context, &a,
+				  auth_context->remote_address,
+				  auth_context->remote_port);
+	if (ret)
+	    goto out;
+
+
+	ret = compare_addrs(context, a, enc_krb_cred_part.s_address,
+			    N_("sender address is wrong "
+			       "in received creds", ""));
+	krb5_free_address(context, a);
+	free(a);
+	if(ret)
+	    goto out;
+    }
+
+    /* check receiver address */
+
+    if (enc_krb_cred_part.r_address
+	&& auth_context->local_address) {
+	if(auth_context->local_port &&
+	   enc_krb_cred_part.r_address->addr_type == KRB5_ADDRESS_ADDRPORT) {
+	    krb5_address *a;
+	    ret = krb5_make_addrport (context, &a,
+				      auth_context->local_address,
+				      auth_context->local_port);
+	    if (ret)
+		goto out;
+
+	    ret = compare_addrs(context, a, enc_krb_cred_part.r_address,
+				N_("receiver address is wrong "
+				   "in received creds", ""));
+	    krb5_free_address(context, a);
+	    free(a);
+	    if(ret)
+		goto out;
+	} else {
+	    ret = compare_addrs(context, auth_context->local_address,
+				enc_krb_cred_part.r_address,
+				N_("receiver address is wrong "
+				   "in received creds", ""));
+	    if(ret)
+		goto out;
+	}
+    }
+
+    /* check timestamp */
+    if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
+	krb5_timestamp sec;
+
+	krb5_timeofday (context, &sec);
+
+	if (enc_krb_cred_part.timestamp == NULL ||
+	    enc_krb_cred_part.usec      == NULL ||
+	    krb5_time_abs(*enc_krb_cred_part.timestamp, sec)
+	    > context->max_skew) {
+	    krb5_clear_error_message (context);
+	    ret = KRB5KRB_AP_ERR_SKEW;
+	    goto out;
+	}
+    }
+
+    if ((auth_context->flags &
+	 (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE))) {
+	/* if these fields are not present in the cred-part, silently
+           return zero */
+	memset(outdata, 0, sizeof(*outdata));
+	if(enc_krb_cred_part.timestamp)
+	    outdata->timestamp = *enc_krb_cred_part.timestamp;
+	if(enc_krb_cred_part.usec)
+	    outdata->usec = *enc_krb_cred_part.usec;
+	if(enc_krb_cred_part.nonce)
+	    outdata->seq = *enc_krb_cred_part.nonce;
+    }
+
+    /* Convert to NULL terminated list of creds */
+
+    *ret_creds = calloc(enc_krb_cred_part.ticket_info.len + 1,
+			sizeof(**ret_creds));
+
+    if (*ret_creds == NULL) {
+	ret = krb5_enomem(context);
+	goto out;
+    }
+
+    for (i = 0; i < enc_krb_cred_part.ticket_info.len; ++i) {
+	KrbCredInfo *kci = &enc_krb_cred_part.ticket_info.val[i];
+	krb5_creds *creds;
+
+	creds = calloc(1, sizeof(*creds));
+	if(creds == NULL) {
+	    ret = krb5_enomem(context);
+	    goto out;
+	}
+
+	ASN1_MALLOC_ENCODE(Ticket, creds->ticket.data, creds->ticket.length,
+			   &cred.tickets.val[i], &len, ret);
+	if (ret) {
+	    free(creds);
+	    goto out;
+	}
+	if(creds->ticket.length != len)
+	    krb5_abortx(context, "internal error in ASN.1 encoder");
+	ret = copy_EncryptionKey (&kci->key, &creds->session);
+	if (ret) {
+	    krb5_free_creds(context, creds);
+	    goto out;
+	}
+	if (kci->prealm && kci->pname)
+	    _krb5_principalname2krb5_principal (context,
+						&creds->client,
+						*kci->pname,
+						*kci->prealm);
+	if (kci->flags)
+	    creds->flags.b = *kci->flags;
+	if (kci->authtime)
+	    creds->times.authtime = *kci->authtime;
+	if (kci->starttime)
+	    creds->times.starttime = *kci->starttime;
+	if (kci->endtime)
+	    creds->times.endtime = *kci->endtime;
+	if (kci->renew_till)
+	    creds->times.renew_till = *kci->renew_till;
+	if (kci->srealm && kci->sname)
+	    _krb5_principalname2krb5_principal (context,
+						&creds->server,
+						*kci->sname,
+						*kci->srealm);
+	if (kci->caddr)
+	    krb5_copy_addresses (context,
+				 kci->caddr,
+				 &creds->addresses);
+
+	(*ret_creds)[i] = creds;
+
+    }
+    (*ret_creds)[i] = NULL;
+
+    free_KRB_CRED (&cred);
+    free_EncKrbCredPart(&enc_krb_cred_part);
+
+    return 0;
+
+  out:
+    free_EncKrbCredPart(&enc_krb_cred_part);
+    free_KRB_CRED (&cred);
+    if(*ret_creds) {
+	for(i = 0; (*ret_creds)[i]; i++)
+	    krb5_free_creds(context, (*ret_creds)[i]);
+	free(*ret_creds);
+	*ret_creds = NULL;
+    }
+    return ret;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_rd_cred2 (krb5_context      context,
+	       krb5_auth_context auth_context,
+	       krb5_ccache       ccache,
+	       krb5_data         *in_data)
+{
+    krb5_error_code ret;
+    krb5_creds **creds;
+    int i;
+
+    ret = krb5_rd_cred(context, auth_context, in_data, &creds, NULL);
+    if(ret)
+	return ret;
+
+    /* Store the creds in the ccache */
+
+    for(i = 0; creds && creds[i]; i++) {
+	krb5_cc_store_cred(context, ccache, creds[i]);
+	krb5_free_creds(context, creds[i]);
+    }
+    free(creds);
+    return 0;
+}