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 */