1 /*
2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #include "inner.h"
26
27 static void
cc_none0(const br_ssl_client_certificate_class ** pctx)28 cc_none0(const br_ssl_client_certificate_class **pctx)
29 {
30 (void)pctx;
31 }
32
33 static void
cc_none1(const br_ssl_client_certificate_class ** pctx,size_t len)34 cc_none1(const br_ssl_client_certificate_class **pctx, size_t len)
35 {
36 (void)pctx;
37 (void)len;
38 }
39
40 static void
cc_none2(const br_ssl_client_certificate_class ** pctx,const unsigned char * data,size_t len)41 cc_none2(const br_ssl_client_certificate_class **pctx,
42 const unsigned char *data, size_t len)
43 {
44 (void)pctx;
45 (void)data;
46 (void)len;
47 }
48
49 static void
cc_choose(const br_ssl_client_certificate_class ** pctx,const br_ssl_client_context * cc,uint32_t auth_types,br_ssl_client_certificate * choices)50 cc_choose(const br_ssl_client_certificate_class **pctx,
51 const br_ssl_client_context *cc, uint32_t auth_types,
52 br_ssl_client_certificate *choices)
53 {
54 br_ssl_client_certificate_rsa_context *zc;
55 int x;
56
57 (void)cc;
58 zc = (br_ssl_client_certificate_rsa_context *)pctx;
59 x = br_ssl_choose_hash((unsigned)auth_types);
60 if (x == 0 && (auth_types & 1) == 0) {
61 memset(choices, 0, sizeof *choices);
62 }
63 choices->auth_type = BR_AUTH_RSA;
64 choices->hash_id = x;
65 choices->chain = zc->chain;
66 choices->chain_len = zc->chain_len;
67 }
68
69 /*
70 * OID for hash functions in RSA signatures.
71 */
72 static const unsigned char HASH_OID_SHA1[] = {
73 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A
74 };
75
76 static const unsigned char HASH_OID_SHA224[] = {
77 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04
78 };
79
80 static const unsigned char HASH_OID_SHA256[] = {
81 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01
82 };
83
84 static const unsigned char HASH_OID_SHA384[] = {
85 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02
86 };
87
88 static const unsigned char HASH_OID_SHA512[] = {
89 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03
90 };
91
92 static const unsigned char *HASH_OID[] = {
93 HASH_OID_SHA1,
94 HASH_OID_SHA224,
95 HASH_OID_SHA256,
96 HASH_OID_SHA384,
97 HASH_OID_SHA512
98 };
99
100 static size_t
cc_do_sign(const br_ssl_client_certificate_class ** pctx,int hash_id,size_t hv_len,unsigned char * data,size_t len)101 cc_do_sign(const br_ssl_client_certificate_class **pctx,
102 int hash_id, size_t hv_len, unsigned char *data, size_t len)
103 {
104 br_ssl_client_certificate_rsa_context *zc;
105 unsigned char hv[64];
106 const unsigned char *hash_oid;
107 size_t sig_len;
108
109 zc = (br_ssl_client_certificate_rsa_context *)pctx;
110 memcpy(hv, data, hv_len);
111 if (hash_id == 0) {
112 hash_oid = NULL;
113 } else if (hash_id >= 2 && hash_id <= 6) {
114 hash_oid = HASH_OID[hash_id - 2];
115 } else {
116 return 0;
117 }
118 sig_len = (zc->sk->n_bitlen + 7) >> 3;
119 if (len < sig_len) {
120 return 0;
121 }
122 return zc->irsasign(hash_oid, hv, hv_len, zc->sk, data) ? sig_len : 0;
123 }
124
125 static const br_ssl_client_certificate_class ccert_vtable = {
126 sizeof(br_ssl_client_certificate_rsa_context),
127 cc_none0, /* start_name_list */
128 cc_none1, /* start_name */
129 cc_none2, /* append_name */
130 cc_none0, /* end_name */
131 cc_none0, /* end_name_list */
132 cc_choose,
133 0,
134 cc_do_sign
135 };
136
137 /* see bearssl_ssl.h */
138 void
br_ssl_client_set_single_rsa(br_ssl_client_context * cc,const br_x509_certificate * chain,size_t chain_len,const br_rsa_private_key * sk,br_rsa_pkcs1_sign irsasign)139 br_ssl_client_set_single_rsa(br_ssl_client_context *cc,
140 const br_x509_certificate *chain, size_t chain_len,
141 const br_rsa_private_key *sk, br_rsa_pkcs1_sign irsasign)
142 {
143 cc->client_auth.single_rsa.vtable = &ccert_vtable;
144 cc->client_auth.single_rsa.chain = chain;
145 cc->client_auth.single_rsa.chain_len = chain_len;
146 cc->client_auth.single_rsa.sk = sk;
147 cc->client_auth.single_rsa.irsasign = irsasign;
148 cc->client_auth_vtable = &cc->client_auth.single_rsa.vtable;
149 }
150