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-rw-r--r--source4/heimdal/lib/krb5/crypto-pk.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/source4/heimdal/lib/krb5/crypto-pk.c b/source4/heimdal/lib/krb5/crypto-pk.c
new file mode 100644
index 0000000000..21e729c9e1
--- /dev/null
+++ b/source4/heimdal/lib/krb5/crypto-pk.c
@@ -0,0 +1,292 @@
+/*
+ * Copyright (c) 1997 - 2008 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"
+
+#include <pkinit_asn1.h>
+
+krb5_error_code
+_krb5_pk_octetstring2key(krb5_context context,
+ krb5_enctype type,
+ const void *dhdata,
+ size_t dhsize,
+ const heim_octet_string *c_n,
+ const heim_octet_string *k_n,
+ krb5_keyblock *key)
+{
+ struct encryption_type *et = _krb5_find_enctype(type);
+ krb5_error_code ret;
+ size_t keylen, offset;
+ void *keydata;
+ unsigned char counter;
+ unsigned char shaoutput[SHA_DIGEST_LENGTH];
+ EVP_MD_CTX *m;
+
+ if(et == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ type);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ keylen = (et->keytype->bits + 7) / 8;
+
+ keydata = malloc(keylen);
+ if (keydata == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ free(keydata);
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ counter = 0;
+ offset = 0;
+ do {
+
+ EVP_DigestInit_ex(m, EVP_sha1(), NULL);
+ EVP_DigestUpdate(m, &counter, 1);
+ EVP_DigestUpdate(m, dhdata, dhsize);
+
+ if (c_n)
+ EVP_DigestUpdate(m, c_n->data, c_n->length);
+ if (k_n)
+ EVP_DigestUpdate(m, k_n->data, k_n->length);
+
+ EVP_DigestFinal_ex(m, shaoutput, NULL);
+
+ memcpy((unsigned char *)keydata + offset,
+ shaoutput,
+ min(keylen - offset, sizeof(shaoutput)));
+
+ offset += sizeof(shaoutput);
+ counter++;
+ } while(offset < keylen);
+ memset(shaoutput, 0, sizeof(shaoutput));
+
+ EVP_MD_CTX_destroy(m);
+
+ ret = krb5_random_to_key(context, type, keydata, keylen, key);
+ memset(keydata, 0, sizeof(keylen));
+ free(keydata);
+ return ret;
+}
+
+static krb5_error_code
+encode_uvinfo(krb5_context context, krb5_const_principal p, krb5_data *data)
+{
+ KRB5PrincipalName pn;
+ krb5_error_code ret;
+ size_t size;
+
+ pn.principalName = p->name;
+ pn.realm = p->realm;
+
+ ASN1_MALLOC_ENCODE(KRB5PrincipalName, data->data, data->length,
+ &pn, &size, ret);
+ if (ret) {
+ krb5_data_zero(data);
+ krb5_set_error_message(context, ret,
+ N_("Failed to encode KRB5PrincipalName", ""));
+ return ret;
+ }
+ if (data->length != size)
+ krb5_abortx(context, "asn1 compiler internal error");
+ return 0;
+}
+
+static krb5_error_code
+encode_otherinfo(krb5_context context,
+ const AlgorithmIdentifier *ai,
+ krb5_const_principal client,
+ krb5_const_principal server,
+ krb5_enctype enctype,
+ const krb5_data *as_req,
+ const krb5_data *pk_as_rep,
+ const Ticket *ticket,
+ krb5_data *other)
+{
+ PkinitSP80056AOtherInfo otherinfo;
+ PkinitSuppPubInfo pubinfo;
+ krb5_error_code ret;
+ krb5_data pub;
+ size_t size;
+
+ krb5_data_zero(other);
+ memset(&otherinfo, 0, sizeof(otherinfo));
+ memset(&pubinfo, 0, sizeof(pubinfo));
+
+ pubinfo.enctype = enctype;
+ pubinfo.as_REQ = *as_req;
+ pubinfo.pk_as_rep = *pk_as_rep;
+ pubinfo.ticket = *ticket;
+ ASN1_MALLOC_ENCODE(PkinitSuppPubInfo, pub.data, pub.length,
+ &pubinfo, &size, ret);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ return ret;
+ }
+ if (pub.length != size)
+ krb5_abortx(context, "asn1 compiler internal error");
+
+ ret = encode_uvinfo(context, client, &otherinfo.partyUInfo);
+ if (ret) {
+ free(pub.data);
+ return ret;
+ }
+ ret = encode_uvinfo(context, server, &otherinfo.partyVInfo);
+ if (ret) {
+ free(otherinfo.partyUInfo.data);
+ free(pub.data);
+ return ret;
+ }
+
+ otherinfo.algorithmID = *ai;
+ otherinfo.suppPubInfo = &pub;
+
+ ASN1_MALLOC_ENCODE(PkinitSP80056AOtherInfo, other->data, other->length,
+ &otherinfo, &size, ret);
+ free(otherinfo.partyUInfo.data);
+ free(otherinfo.partyVInfo.data);
+ free(pub.data);
+ if (ret) {
+ krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
+ return ret;
+ }
+ if (other->length != size)
+ krb5_abortx(context, "asn1 compiler internal error");
+
+ return 0;
+}
+
+krb5_error_code
+_krb5_pk_kdf(krb5_context context,
+ const struct AlgorithmIdentifier *ai,
+ const void *dhdata,
+ size_t dhsize,
+ krb5_const_principal client,
+ krb5_const_principal server,
+ krb5_enctype enctype,
+ const krb5_data *as_req,
+ const krb5_data *pk_as_rep,
+ const Ticket *ticket,
+ krb5_keyblock *key)
+{
+ struct encryption_type *et;
+ krb5_error_code ret;
+ krb5_data other;
+ size_t keylen, offset;
+ uint32_t counter;
+ unsigned char *keydata;
+ unsigned char shaoutput[SHA_DIGEST_LENGTH];
+ EVP_MD_CTX *m;
+
+ if (der_heim_oid_cmp(&asn1_oid_id_pkinit_kdf_ah_sha1, &ai->algorithm) != 0) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("KDF not supported", ""));
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ if (ai->parameters != NULL &&
+ (ai->parameters->length != 2 ||
+ memcmp(ai->parameters->data, "\x05\x00", 2) != 0))
+ {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("kdf params not NULL or the NULL-type",
+ ""));
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+
+ et = _krb5_find_enctype(enctype);
+ if(et == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ enctype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ keylen = (et->keytype->bits + 7) / 8;
+
+ keydata = malloc(keylen);
+ if (keydata == NULL) {
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ ret = encode_otherinfo(context, ai, client, server,
+ enctype, as_req, pk_as_rep, ticket, &other);
+ if (ret) {
+ free(keydata);
+ return ret;
+ }
+
+ m = EVP_MD_CTX_create();
+ if (m == NULL) {
+ free(keydata);
+ free(other.data);
+ krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+
+ offset = 0;
+ counter = 1;
+ do {
+ unsigned char cdata[4];
+
+ EVP_DigestInit_ex(m, EVP_sha1(), NULL);
+ _krb5_put_int(cdata, counter, 4);
+ EVP_DigestUpdate(m, cdata, 4);
+ EVP_DigestUpdate(m, dhdata, dhsize);
+ EVP_DigestUpdate(m, other.data, other.length);
+
+ EVP_DigestFinal_ex(m, shaoutput, NULL);
+
+ memcpy((unsigned char *)keydata + offset,
+ shaoutput,
+ min(keylen - offset, sizeof(shaoutput)));
+
+ offset += sizeof(shaoutput);
+ counter++;
+ } while(offset < keylen);
+ memset(shaoutput, 0, sizeof(shaoutput));
+
+ EVP_MD_CTX_destroy(m);
+ free(other.data);
+
+ ret = krb5_random_to_key(context, enctype, keydata, keylen, key);
+ memset(keydata, 0, sizeof(keylen));
+ free(keydata);
+
+ return ret;
+}
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