xref: /titanic_41/usr/src/lib/krb5/plugins/preauth/pkinit/pkinit_crypto_openssl.h (revision 6a634c9dca3093f3922e4b7ab826d7bdf17bf78e)
1 /*
2  * COPYRIGHT (C) 2006,2007
3  * THE REGENTS OF THE UNIVERSITY OF MICHIGAN
4  * ALL RIGHTS RESERVED
5  *
6  * Permission is granted to use, copy, create derivative works
7  * and redistribute this software and such derivative works
8  * for any purpose, so long as the name of The University of
9  * Michigan is not used in any advertising or publicity
10  * pertaining to the use of distribution of this software
11  * without specific, written prior authorization.  If the
12  * above copyright notice or any other identification of the
13  * University of Michigan is included in any copy of any
14  * portion of this software, then the disclaimer below must
15  * also be included.
16  *
17  * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION
18  * FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY
19  * PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF
20  * MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
21  * WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
22  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
23  * REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE
24  * FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR
25  * CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING
26  * OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
27  * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGES.
29  */
30 
31 /*
32  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
33  */
34 
35 #ifndef _PKINIT_CRYPTO_OPENSSL_H
36 #define _PKINIT_CRYPTO_OPENSSL_H
37 
38 #include <openssl/bn.h>
39 #include <openssl/dh.h>
40 #include <openssl/x509.h>
41 #include <openssl/pkcs7.h>
42 #include <openssl/pkcs12.h>
43 #include <openssl/obj_mac.h>
44 #include <openssl/x509v3.h>
45 #include <openssl/err.h>
46 #include <openssl/evp.h>
47 #include <openssl/asn1_mac.h>
48 #include <openssl/sha.h>
49 #include <openssl/asn1.h>
50 #include <openssl/pem.h>
51 
52 #include "pkinit.h"
53 
54 #define DN_BUF_LEN  256
55 #define MAX_CREDS_ALLOWED 20
56 
57 struct _pkinit_cred_info {
58     X509 *cert;
59     EVP_PKEY *key;
60 #ifndef WITHOUT_PKCS11
61     CK_BYTE_PTR cert_id;
62     int cert_id_len;
63 #endif
64 };
65 typedef struct _pkinit_cred_info * pkinit_cred_info;
66 
67 struct _pkinit_identity_crypto_context {
68     pkinit_cred_info creds[MAX_CREDS_ALLOWED+1];
69     STACK_OF(X509) *my_certs;   /* available user certs */
70     int cert_index;             /* cert to use out of available certs*/
71     EVP_PKEY *my_key;           /* available user keys if in filesystem */
72     STACK_OF(X509) *trustedCAs; /* available trusted ca certs */
73     STACK_OF(X509) *intermediateCAs;   /* available intermediate ca certs */
74     STACK_OF(X509_CRL) *revoked;    /* available crls */
75     int pkcs11_method;
76     krb5_prompter_fct prompter;
77     void *prompter_data;
78 #ifndef WITHOUT_PKCS11
79     char *p11_module_name;
80     CK_SLOT_ID slotid;
81     char *token_label;
82     char *cert_label;
83     char *PIN; /* Solaris Kerberos: */
84     /* These are crypto-specific */
85     void *p11_module;
86     CK_SESSION_HANDLE session;
87     CK_FUNCTION_LIST_PTR p11;
88     CK_BYTE_PTR cert_id;
89     int cert_id_len;
90     CK_MECHANISM_TYPE mech;
91     /* Solaris Kerberos: need to keep some state */
92     uint_t p11flags;
93     /*
94      * Solaris Kerberos:
95      * If PKCS#11 is already being used by the process then C_Finalize should
96      * not be called by pkinit as it would invalidate any PKCS#11 sessions the
97      * process was using prior to loading the pkinit plugin. "finalize_pkcs11"
98      * indicates whether or not C_Finalize should be called by pkinit.
99      */
100     krb5_boolean finalize_pkcs11;
101 #endif
102 };
103 
104 /* Solaris Kerberos: need to know if login was done */
105 #define	C_LOGIN_DONE 0x1 /* The session is logged in. */
106 #define	C_PROMPTED_USER 0x2 /* The user was prompted for token. */
107 #define	C_SKIP_PKCS11_AUTH 0x4 /* User does not want to do PKCS11 auth */
108 
109 struct _pkinit_plg_crypto_context {
110     DH *dh_1024;
111     DH *dh_2048;
112     DH *dh_4096;
113     ASN1_OBJECT *id_pkinit_authData;
114     ASN1_OBJECT *id_pkinit_authData9;
115     ASN1_OBJECT *id_pkinit_DHKeyData;
116     ASN1_OBJECT *id_pkinit_rkeyData;
117     ASN1_OBJECT *id_pkinit_san;
118     ASN1_OBJECT *id_ms_san_upn;
119     ASN1_OBJECT *id_pkinit_KPClientAuth;
120     ASN1_OBJECT *id_pkinit_KPKdc;
121     ASN1_OBJECT *id_ms_kp_sc_logon;
122     ASN1_OBJECT *id_kp_serverAuth;
123 };
124 
125 struct _pkinit_req_crypto_context {
126     X509 *received_cert;
127     DH *dh;
128 };
129 
130 #define CERT_MAGIC 0x53534c43
131 struct _pkinit_cert_data {
132     unsigned int magic;
133     pkinit_plg_crypto_context plgctx;
134     pkinit_req_crypto_context reqctx;
135     pkinit_identity_crypto_context idctx;
136     pkinit_cred_info cred;
137     unsigned int index;	    /* Index of this cred in the creds[] array */
138 };
139 
140 #define ITER_MAGIC 0x53534c49
141 struct _pkinit_cert_iter_data {
142     unsigned int magic;
143     pkinit_plg_crypto_context plgctx;
144     pkinit_req_crypto_context reqctx;
145     pkinit_identity_crypto_context idctx;
146     unsigned int index;
147 };
148 
149 /* Solaris Kerberos */
150 static krb5_error_code openssl_init(void);
151 
152 static krb5_error_code pkinit_init_pkinit_oids(pkinit_plg_crypto_context );
153 static void pkinit_fini_pkinit_oids(pkinit_plg_crypto_context );
154 
155 static krb5_error_code pkinit_init_dh_params(pkinit_plg_crypto_context );
156 static void pkinit_fini_dh_params(pkinit_plg_crypto_context );
157 
158 static krb5_error_code pkinit_init_certs(pkinit_identity_crypto_context ctx);
159 static void pkinit_fini_certs(pkinit_identity_crypto_context ctx);
160 
161 static krb5_error_code pkinit_init_pkcs11(pkinit_identity_crypto_context ctx);
162 static void pkinit_fini_pkcs11(pkinit_identity_crypto_context ctx);
163 
164 static krb5_error_code pkinit_encode_dh_params
165 	(BIGNUM *, BIGNUM *, BIGNUM *, unsigned char **, unsigned int *);
166 static DH *pkinit_decode_dh_params
167 	(DH **, unsigned char **, unsigned int );
168 static int pkinit_check_dh_params
169 	(BIGNUM * p1, BIGNUM * p2, BIGNUM * g1, BIGNUM * q1);
170 
171 static krb5_error_code pkinit_sign_data
172 	(krb5_context context, pkinit_identity_crypto_context cryptoctx,
173 		unsigned char *data, unsigned int data_len,
174 		unsigned char **sig, unsigned int *sig_len);
175 
176 static krb5_error_code create_signature
177 	(unsigned char **, unsigned int *, unsigned char *, unsigned int,
178 		EVP_PKEY *pkey);
179 
180 static krb5_error_code pkinit_decode_data
181 	(krb5_context context, pkinit_identity_crypto_context cryptoctx,
182 		unsigned char *data, unsigned int data_len,
183 		unsigned char **decoded, unsigned int *decoded_len);
184 
185 static krb5_error_code decode_data
186 	(unsigned char **, unsigned int *, unsigned char *, unsigned int,
187 		EVP_PKEY *pkey, X509 *cert);
188 
189 #ifdef DEBUG_DH
190 static void print_dh(DH *, char *);
191 static void print_pubkey(BIGNUM *, char *);
192 #endif
193 
194 static int prepare_enc_data
195 	(unsigned char *indata, int indata_len, unsigned char **outdata,
196 		int *outdata_len);
197 
198 static int openssl_callback (int, X509_STORE_CTX *);
199 static int openssl_callback_ignore_crls (int, X509_STORE_CTX *);
200 
201 static int pkcs7_decrypt
202 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
203 		PKCS7 *p7, BIO *bio);
204 
205 static BIO * pkcs7_dataDecode
206 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
207 		PKCS7 *p7);
208 
209 static ASN1_OBJECT * pkinit_pkcs7type2oid
210 	(pkinit_plg_crypto_context plg_cryptoctx, int pkcs7_type);
211 
212 static krb5_error_code pkinit_create_sequence_of_principal_identifiers
213 	(krb5_context context, pkinit_plg_crypto_context plg_cryptoctx,
214 		pkinit_req_crypto_context req_cryptoctx,
215 		pkinit_identity_crypto_context id_cryptoctx,
216 		int type, krb5_data **out_data);
217 
218 #ifndef WITHOUT_PKCS11
219 static krb5_error_code pkinit_find_private_key
220 	(pkinit_identity_crypto_context, CK_ATTRIBUTE_TYPE usage,
221 		CK_OBJECT_HANDLE *objp);
222 static krb5_error_code pkinit_login
223 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
224 		CK_TOKEN_INFO *tip);
225 static void * pkinit_C_LoadModule(const char *modname, CK_FUNCTION_LIST_PTR_PTR p11p);
226 static CK_RV pkinit_C_UnloadModule(void *handle);
227 #ifdef SILLYDECRYPT
228 CK_RV pkinit_C_Decrypt
229 	(pkinit_identity_crypto_context id_cryptoctx,
230 		CK_BYTE_PTR pEncryptedData, CK_ULONG  ulEncryptedDataLen,
231 		CK_BYTE_PTR pData, CK_ULONG_PTR pulDataLen);
232 #endif
233 
234 static krb5_error_code pkinit_sign_data_pkcs11
235 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
236 		unsigned char *data, unsigned int data_len,
237 		unsigned char **sig, unsigned int *sig_len);
238 static krb5_error_code pkinit_decode_data_pkcs11
239 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
240 		unsigned char *data, unsigned int data_len,
241 		unsigned char **decoded_data, unsigned int *decoded_data_len);
242 #endif	/* WITHOUT_PKCS11 */
243 
244 static krb5_error_code pkinit_sign_data_fs
245 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
246 		unsigned char *data, unsigned int data_len,
247 		unsigned char **sig, unsigned int *sig_len);
248 static krb5_error_code pkinit_decode_data_fs
249 	(krb5_context context, pkinit_identity_crypto_context id_cryptoctx,
250 		unsigned char *data, unsigned int data_len,
251 		unsigned char **decoded_data, unsigned int *decoded_data_len);
252 
253 static krb5_error_code der_decode_data
254 	(unsigned char *, long, unsigned char **, long *);
255 
256 static krb5_error_code
257 create_krb5_invalidCertificates(krb5_context context,
258 				pkinit_plg_crypto_context plg_cryptoctx,
259 				pkinit_req_crypto_context req_cryptoctx,
260 				pkinit_identity_crypto_context id_cryptoctx,
261 				krb5_external_principal_identifier *** ids);
262 
263 static krb5_error_code
264 create_identifiers_from_stack(STACK_OF(X509) *sk,
265 			      krb5_external_principal_identifier *** ids);
266 #ifdef LONGHORN_BETA_COMPAT
267 static int
268 wrap_signeddata(unsigned char *data, unsigned int data_len,
269 		unsigned char **out, unsigned int *out_len,
270 		int is_longhorn_server);
271 #else
272 static int
273 wrap_signeddata(unsigned char *data, unsigned int data_len,
274 		unsigned char **out, unsigned int *out_len);
275 #endif
276 
277 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */
278 #define ku_reject(x, usage) \
279 	(((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
280 
281 static char *
282 pkinit_pkcs11_code_to_text(int err);
283 
284 #endif	/* _PKINIT_CRYPTO_OPENSSL_H */
285