1 /* 	$OpenBSD: common.c,v 1.5 2021/12/14 21:25:27 deraadt Exp $ */
2 /*
3  * Helpers for key API tests
4  *
5  * Placed in the public domain
6  */
7 
8 #include "includes.h"
9 
10 #include <sys/types.h>
11 #include <sys/stat.h>
12 #include <fcntl.h>
13 #include <stdio.h>
14 #ifdef HAVE_STDINT_H
15 #include <stdint.h>
16 #endif
17 #include <stdlib.h>
18 #include <string.h>
19 #include <unistd.h>
20 
21 #ifdef WITH_OPENSSL
22 #include <openssl/bn.h>
23 #include <openssl/rsa.h>
24 #include <openssl/dsa.h>
25 #include <openssl/objects.h>
26 #ifdef OPENSSL_HAS_NISTP256
27 # include <openssl/ec.h>
28 #endif /* OPENSSL_HAS_NISTP256 */
29 #endif /* WITH_OPENSSL */
30 
31 #include "openbsd-compat/openssl-compat.h"
32 
33 #include "../test_helper/test_helper.h"
34 
35 #include "ssherr.h"
36 #include "authfile.h"
37 #include "sshkey.h"
38 #include "sshbuf.h"
39 
40 #include "common.h"
41 
42 struct sshbuf *
43 load_file(const char *name)
44 {
45 	struct sshbuf *ret = NULL;
46 
47 	ASSERT_INT_EQ(sshbuf_load_file(test_data_file(name), &ret), 0);
48 	ASSERT_PTR_NE(ret, NULL);
49 	return ret;
50 }
51 
52 struct sshbuf *
53 load_text_file(const char *name)
54 {
55 	struct sshbuf *ret = load_file(name);
56 	const u_char *p;
57 
58 	/* Trim whitespace at EOL */
59 	for (p = sshbuf_ptr(ret); sshbuf_len(ret) > 0;) {
60 		if (p[sshbuf_len(ret) - 1] == '\r' ||
61 		    p[sshbuf_len(ret) - 1] == '\t' ||
62 		    p[sshbuf_len(ret) - 1] == ' ' ||
63 		    p[sshbuf_len(ret) - 1] == '\n')
64 			ASSERT_INT_EQ(sshbuf_consume_end(ret, 1), 0);
65 		else
66 			break;
67 	}
68 	/* \0 terminate */
69 	ASSERT_INT_EQ(sshbuf_put_u8(ret, 0), 0);
70 	return ret;
71 }
72 
73 #ifdef WITH_OPENSSL
74 BIGNUM *
75 load_bignum(const char *name)
76 {
77 	BIGNUM *ret = NULL;
78 	struct sshbuf *buf;
79 
80 	buf = load_text_file(name);
81 	ASSERT_INT_NE(BN_hex2bn(&ret, (const char *)sshbuf_ptr(buf)), 0);
82 	sshbuf_free(buf);
83 	return ret;
84 }
85 
86 const BIGNUM *
87 rsa_n(struct sshkey *k)
88 {
89 	const BIGNUM *n = NULL;
90 
91 	ASSERT_PTR_NE(k, NULL);
92 	ASSERT_PTR_NE(k->rsa, NULL);
93 	RSA_get0_key(k->rsa, &n, NULL, NULL);
94 	return n;
95 }
96 
97 const BIGNUM *
98 rsa_e(struct sshkey *k)
99 {
100 	const BIGNUM *e = NULL;
101 
102 	ASSERT_PTR_NE(k, NULL);
103 	ASSERT_PTR_NE(k->rsa, NULL);
104 	RSA_get0_key(k->rsa, NULL, &e, NULL);
105 	return e;
106 }
107 
108 const BIGNUM *
109 rsa_p(struct sshkey *k)
110 {
111 	const BIGNUM *p = NULL;
112 
113 	ASSERT_PTR_NE(k, NULL);
114 	ASSERT_PTR_NE(k->rsa, NULL);
115 	RSA_get0_factors(k->rsa, &p, NULL);
116 	return p;
117 }
118 
119 const BIGNUM *
120 rsa_q(struct sshkey *k)
121 {
122 	const BIGNUM *q = NULL;
123 
124 	ASSERT_PTR_NE(k, NULL);
125 	ASSERT_PTR_NE(k->rsa, NULL);
126 	RSA_get0_factors(k->rsa, NULL, &q);
127 	return q;
128 }
129 
130 const BIGNUM *
131 dsa_g(struct sshkey *k)
132 {
133 	const BIGNUM *g = NULL;
134 
135 	ASSERT_PTR_NE(k, NULL);
136 	ASSERT_PTR_NE(k->dsa, NULL);
137 	DSA_get0_pqg(k->dsa, NULL, NULL, &g);
138 	return g;
139 }
140 
141 const BIGNUM *
142 dsa_pub_key(struct sshkey *k)
143 {
144 	const BIGNUM *pub_key = NULL;
145 
146 	ASSERT_PTR_NE(k, NULL);
147 	ASSERT_PTR_NE(k->dsa, NULL);
148 	DSA_get0_key(k->dsa, &pub_key, NULL);
149 	return pub_key;
150 }
151 
152 const BIGNUM *
153 dsa_priv_key(struct sshkey *k)
154 {
155 	const BIGNUM *priv_key = NULL;
156 
157 	ASSERT_PTR_NE(k, NULL);
158 	ASSERT_PTR_NE(k->dsa, NULL);
159 	DSA_get0_key(k->dsa, NULL, &priv_key);
160 	return priv_key;
161 }
162 #endif /* WITH_OPENSSL */
163 
164