diff options
Diffstat (limited to 'third_party/heimdal/lib/krb5/mk_req_ext.c')
-rw-r--r-- | third_party/heimdal/lib/krb5/mk_req_ext.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/mk_req_ext.c b/third_party/heimdal/lib/krb5/mk_req_ext.c new file mode 100644 index 0000000..a8a07f1 --- /dev/null +++ b/third_party/heimdal/lib/krb5/mk_req_ext.c @@ -0,0 +1,151 @@ +/* + * Copyright (c) 1997 - 2002 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" + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +_krb5_mk_req_internal(krb5_context context, + krb5_auth_context *auth_context, + const krb5_flags ap_req_options, + krb5_data *in_data, + krb5_creds *in_creds, + krb5_data *outbuf, + krb5_key_usage checksum_usage, + krb5_key_usage encrypt_usage) +{ + krb5_error_code ret; + krb5_data authenticator; + Checksum c; + Checksum *c_opt; + krb5_auth_context ac; + + if(auth_context) { + if(*auth_context == NULL) + ret = krb5_auth_con_init(context, auth_context); + else + ret = 0; + ac = *auth_context; + } else + ret = krb5_auth_con_init(context, &ac); + if(ret) + return ret; + + if(ac->local_subkey == NULL && (ap_req_options & AP_OPTS_USE_SUBKEY)) { + ret = krb5_auth_con_generatelocalsubkey(context, + ac, + &in_creds->session); + if(ret) + goto out; + } + + krb5_free_keyblock(context, ac->keyblock); + ret = krb5_copy_keyblock(context, &in_creds->session, &ac->keyblock); + if (ret) + goto out; + + /* + * Use the default checksum type except for some interoperability cases + * with older MIT, DCE and Windows KDCs. + */ + if (in_data) { + krb5_crypto crypto; + krb5_cksumtype checksum_type = CKSUMTYPE_NONE; + + if (ac->keyblock->keytype == ETYPE_DES_CBC_CRC) + checksum_type = CKSUMTYPE_RSA_MD4; + else if (ac->keyblock->keytype == ETYPE_DES_CBC_MD4 || + ac->keyblock->keytype == ETYPE_DES_CBC_MD5 || + ac->keyblock->keytype == ETYPE_ARCFOUR_HMAC_MD5 || + ac->keyblock->keytype == ETYPE_ARCFOUR_HMAC_MD5_56) + checksum_type = CKSUMTYPE_RSA_MD5; + else + checksum_type = CKSUMTYPE_NONE; + + ret = krb5_crypto_init(context, ac->keyblock, 0, &crypto); + if (ret) + goto out; + + _krb5_crypto_set_flags(context, crypto, KRB5_CRYPTO_FLAG_ALLOW_UNKEYED_CHECKSUM); + ret = krb5_create_checksum(context, + crypto, + checksum_usage, + checksum_type, + in_data->data, + in_data->length, + &c); + krb5_crypto_destroy(context, crypto); + c_opt = &c; + } else { + c_opt = NULL; + } + + if (ret) + goto out; + + ret = _krb5_build_authenticator(context, + ac, + ac->keyblock->keytype, + in_creds, + c_opt, + &authenticator, + encrypt_usage); + if (c_opt) + free_Checksum (c_opt); + if (ret) + goto out; + + ret = krb5_build_ap_req (context, ac->keyblock->keytype, + in_creds, ap_req_options, authenticator, outbuf); +out: + if(auth_context == NULL) + krb5_auth_con_free(context, ac); + return ret; +} + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_mk_req_extended(krb5_context context, + krb5_auth_context *auth_context, + const krb5_flags ap_req_options, + krb5_data *in_data, + krb5_creds *in_creds, + krb5_data *outbuf) +{ + return _krb5_mk_req_internal (context, + auth_context, + ap_req_options, + in_data, + in_creds, + outbuf, + KRB5_KU_AP_REQ_AUTH_CKSUM, + KRB5_KU_AP_REQ_AUTH); +} |