From 9a085b0b80d1528e2b7a65ae8a4647cffff74a0c Mon Sep 17 00:00:00 2001 From: Andrew Bartlett Date: Tue, 27 Dec 2011 22:00:22 +1100 Subject: auth/kerberos: Move gssapi_parse.c to the top level This will help with writing a gensec module for the s3 gse layer. Andrew Bartlett --- auth/kerberos/gssapi_parse.c | 119 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 auth/kerberos/gssapi_parse.c (limited to 'auth/kerberos/gssapi_parse.c') diff --git a/auth/kerberos/gssapi_parse.c b/auth/kerberos/gssapi_parse.c new file mode 100644 index 0000000000..6e9eddced6 --- /dev/null +++ b/auth/kerberos/gssapi_parse.c @@ -0,0 +1,119 @@ +/* + Unix SMB/CIFS implementation. + + simple GSSAPI wrappers + + Copyright (C) Andrew Tridgell 2001 + Copyright (C) Jim McDonough 2002 + Copyright (C) Luke Howard 2003 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ + +#include "includes.h" +#include "../lib/util/asn1.h" +#include "auth/gensec/gensec.h" +#include "system/kerberos.h" +#include "auth/kerberos/kerberos.h" + +/* + generate a krb5 GSS-API wrapper packet given a ticket +*/ +DATA_BLOB gensec_gssapi_gen_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *ticket, const uint8_t tok_id[2]) +{ + struct asn1_data *data; + DATA_BLOB ret; + + data = asn1_init(mem_ctx); + if (!data || !ticket->data) { + return data_blob(NULL,0); + } + + asn1_push_tag(data, ASN1_APPLICATION(0)); + asn1_write_OID(data, GENSEC_OID_KERBEROS5); + + asn1_write(data, tok_id, 2); + asn1_write(data, ticket->data, ticket->length); + asn1_pop_tag(data); + + if (data->has_error) { + DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data->ofs)); + asn1_free(data); + return data_blob(NULL,0); + } + + ret = data_blob_talloc(mem_ctx, data->data, data->length); + asn1_free(data); + + return ret; +} + +/* + parse a krb5 GSS-API wrapper packet giving a ticket +*/ +bool gensec_gssapi_parse_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, DATA_BLOB *ticket, uint8_t tok_id[2]) +{ + bool ret; + struct asn1_data *data = asn1_init(mem_ctx); + int data_remaining; + + if (!data) { + return false; + } + + asn1_load(data, *blob); + asn1_start_tag(data, ASN1_APPLICATION(0)); + asn1_check_OID(data, GENSEC_OID_KERBEROS5); + + data_remaining = asn1_tag_remaining(data); + + if (data_remaining < 3) { + data->has_error = true; + } else { + asn1_read(data, tok_id, 2); + data_remaining -= 2; + *ticket = data_blob_talloc(mem_ctx, NULL, data_remaining); + asn1_read(data, ticket->data, ticket->length); + } + + asn1_end_tag(data); + + ret = !data->has_error; + + asn1_free(data); + + return ret; +} + + +/* + check a GSS-API wrapper packet givin an expected OID +*/ +bool gensec_gssapi_check_oid(const DATA_BLOB *blob, const char *oid) +{ + bool ret; + struct asn1_data *data = asn1_init(NULL); + + if (!data) return false; + + asn1_load(data, *blob); + asn1_start_tag(data, ASN1_APPLICATION(0)); + asn1_check_OID(data, oid); + + ret = !data->has_error; + + asn1_free(data); + + return ret; +} -- cgit