1 /* 	$OpenBSD: common.c,v 1.3 2018/09/13 09:03:20 djm 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/param.h>
12 #include <sys/stat.h>
13 #include <fcntl.h>
14 #include <stdio.h>
15 #ifdef HAVE_STDINT_H
16 #include <stdint.h>
17 #endif
18 #include <stdlib.h>
19 #include <string.h>
20 #include <unistd.h>
21 
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
29 
30 #include "../test_helper/test_helper.h"
31 
32 #include "ssherr.h"
33 #include "authfile.h"
34 #include "sshkey.h"
35 #include "sshbuf.h"
36 
37 #include "common.h"
38 
39 struct sshbuf *
40 load_file(const char *name)
41 {
42 	int fd;
43 	struct sshbuf *ret;
44 
45 	ASSERT_PTR_NE(ret = sshbuf_new(), NULL);
46 	ASSERT_INT_NE(fd = open(test_data_file(name), O_RDONLY), -1);
47 	ASSERT_INT_EQ(sshkey_load_file(fd, ret), 0);
48 	close(fd);
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 BIGNUM *
74 load_bignum(const char *name)
75 {
76 	BIGNUM *ret = NULL;
77 	struct sshbuf *buf;
78 
79 	buf = load_text_file(name);
80 	ASSERT_INT_NE(BN_hex2bn(&ret, (const char *)sshbuf_ptr(buf)), 0);
81 	sshbuf_free(buf);
82 	return ret;
83 }
84 
85 const BIGNUM *
86 rsa_n(struct sshkey *k)
87 {
88 	const BIGNUM *n = NULL;
89 
90 	ASSERT_PTR_NE(k, NULL);
91 	ASSERT_PTR_NE(k->rsa, NULL);
92 	RSA_get0_key(k->rsa, &n, NULL, NULL);
93 	return n;
94 }
95 
96 const BIGNUM *
97 rsa_e(struct sshkey *k)
98 {
99 	const BIGNUM *e = NULL;
100 
101 	ASSERT_PTR_NE(k, NULL);
102 	ASSERT_PTR_NE(k->rsa, NULL);
103 	RSA_get0_key(k->rsa, NULL, &e, NULL);
104 	return e;
105 }
106 
107 const BIGNUM *
108 rsa_p(struct sshkey *k)
109 {
110 	const BIGNUM *p = NULL;
111 
112 	ASSERT_PTR_NE(k, NULL);
113 	ASSERT_PTR_NE(k->rsa, NULL);
114 	RSA_get0_factors(k->rsa, &p, NULL);
115 	return p;
116 }
117 
118 const BIGNUM *
119 rsa_q(struct sshkey *k)
120 {
121 	const BIGNUM *q = NULL;
122 
123 	ASSERT_PTR_NE(k, NULL);
124 	ASSERT_PTR_NE(k->rsa, NULL);
125 	RSA_get0_factors(k->rsa, NULL, &q);
126 	return q;
127 }
128 
129 const BIGNUM *
130 dsa_g(struct sshkey *k)
131 {
132 	const BIGNUM *g = NULL;
133 
134 	ASSERT_PTR_NE(k, NULL);
135 	ASSERT_PTR_NE(k->dsa, NULL);
136 	DSA_get0_pqg(k->dsa, NULL, NULL, &g);
137 	return g;
138 }
139 
140 const BIGNUM *
141 dsa_pub_key(struct sshkey *k)
142 {
143 	const BIGNUM *pub_key = NULL;
144 
145 	ASSERT_PTR_NE(k, NULL);
146 	ASSERT_PTR_NE(k->dsa, NULL);
147 	DSA_get0_key(k->dsa, &pub_key, NULL);
148 	return pub_key;
149 }
150 
151 const BIGNUM *
152 dsa_priv_key(struct sshkey *k)
153 {
154 	const BIGNUM *priv_key = NULL;
155 
156 	ASSERT_PTR_NE(k, NULL);
157 	ASSERT_PTR_NE(k->dsa, NULL);
158 	DSA_get0_key(k->dsa, NULL, &priv_key);
159 	return priv_key;
160 }
161 
162