1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
#include "session_fixture.h"
#include "libssh2_config.h"
#include <libssh2.h>
#include <stdio.h>
static const char *EXPECTED_RSA_HOSTKEY =
"AAAAB3NzaC1yc2EAAAABIwAAAQEArrr/JuJmaZligyfS8vcNur+mWR2ddDQtVdhHzdKU"
"UoR6/Om6cvxpe61H1YZO1xCpLUBXmkki4HoNtYOpPB2W4V+8U4BDeVBD5crypEOE1+7B"
"Am99fnEDxYIOZq2/jTP0yQmzCpWYS3COyFmkOL7sfX1wQMeW5zQT2WKcxC6FSWbhDqrB"
"eNEGi687hJJoJ7YXgY/IdiYW5NcOuqRSWljjGS3dAJsHHWk4nJbhjEDXbPaeduMAwQU9"
"i6ELfP3r+q6wdu0P4jWaoo3De1aYxnToV/ldXykpipON4NPamsb6Ph2qlJQKypq7J4iQ"
"gkIIbCU1A31+4ExvcIVoxLQw/aTSbw==";
static const char *EXPECTED_ECDSA_HOSTKEY =
"AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBC+/syyeKJD9dC2ZH"
"9Q7iJGReR4YM3rUCMsSynkyXojdfSClGCMY7JvWlt30ESjYvxoTfSRGx6WvaqYK/vPoYQ4=";
static const char *EXPECTED_RSA_MD5_HASH_DIGEST = "0C0ED1A5BB10275F76924CE187CE5C5E";
static const char *EXPECTED_RSA_SHA1_HASH_DIGEST =
"F3CD59E2913F4422B80F7B0A82B2B89EAE449387";
static const char *EXPECTED_RSA_SHA256_HASH_DIGEST = "92E3DA49DF3C7F99A828F505ED8239397A5D1F62914459760F878F7510F563A3";
static const char *EXPECTED_ECDSA_MD5_HASH_DIGEST = "0402E4D897580BBC911379CBD88BCD3D";
static const char *EXPECTED_ECDSA_SHA1_HASH_DIGEST =
"12FDAD1E3B31B10BABB00F2A8D1B9A62C326BD2F";
static const char *EXPECTED_ECDSA_SHA256_HASH_DIGEST = "56FCD975B166C3F0342D0036E44C311A86C0EAE40713B53FC776369BAE7F5264";
static const int MD5_HASH_SIZE = 16;
static const int SHA1_HASH_SIZE = 20;
static const int SHA256_HASH_SIZE = 32;
static void calculate_digest(const char *hash, size_t hash_len, char *buffer,
size_t buffer_len)
{
size_t i;
char *p = buffer;
char *end = buffer + buffer_len;
for(i = 0; i < hash_len && p < end; ++i) {
p += snprintf(p, end - p, "%02X", (unsigned char)hash[i]);
}
}
int test(LIBSSH2_SESSION *session)
{
char buf[BUFSIZ];
const char *md5_hash;
const char *sha1_hash;
const char *sha256_hash;
int type;
size_t len;
/* these are the host keys under test, they are currently unused */
(void)EXPECTED_RSA_HOSTKEY;
(void)EXPECTED_ECDSA_HOSTKEY;
const char *hostkey = libssh2_session_hostkey(session, &len, &type);
if(hostkey == NULL) {
print_last_session_error("libssh2_session_hostkey");
return 1;
}
if(type == LIBSSH2_HOSTKEY_TYPE_ECDSA_256) {
md5_hash = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_MD5);
if(md5_hash == NULL) {
print_last_session_error(
"libssh2_hostkey_hash(LIBSSH2_HOSTKEY_HASH_MD5)");
return 1;
}
calculate_digest(md5_hash, MD5_HASH_SIZE, buf, BUFSIZ);
if(strcmp(buf, EXPECTED_ECDSA_MD5_HASH_DIGEST) != 0) {
fprintf(stderr, "ECDSA MD5 hash not as expected - digest %s != %s\n", buf,
EXPECTED_ECDSA_MD5_HASH_DIGEST);
return 1;
}
sha1_hash = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
if(sha1_hash == NULL) {
print_last_session_error(
"libssh2_hostkey_hash(LIBSSH2_HOSTKEY_HASH_SHA1)");
return 1;
}
calculate_digest(sha1_hash, SHA1_HASH_SIZE, buf, BUFSIZ);
if(strcmp(buf, EXPECTED_ECDSA_SHA1_HASH_DIGEST) != 0) {
fprintf(stderr, "ECDSA SHA1 hash not as expected - digest %s != %s\n", buf,
EXPECTED_ECDSA_SHA1_HASH_DIGEST);
return 1;
}
sha256_hash = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA256);
if(sha256_hash == NULL) {
print_last_session_error(
"libssh2_hostkey_hash(LIBSSH2_HOSTKEY_HASH_SHA256)");
return 1;
}
calculate_digest(sha256_hash, SHA256_HASH_SIZE, buf, BUFSIZ);
if(strcmp(buf, EXPECTED_ECDSA_SHA256_HASH_DIGEST) != 0) {
fprintf(stderr, "ECDSA SHA256 hash not as expected - digest %s != %s\n", buf,
EXPECTED_ECDSA_SHA256_HASH_DIGEST);
return 1;
}
}
else if(type == LIBSSH2_HOSTKEY_TYPE_RSA) {
md5_hash = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_MD5);
if(md5_hash == NULL) {
print_last_session_error(
"libssh2_hostkey_hash(LIBSSH2_HOSTKEY_HASH_MD5)");
return 1;
}
calculate_digest(md5_hash, MD5_HASH_SIZE, buf, BUFSIZ);
if(strcmp(buf, EXPECTED_RSA_MD5_HASH_DIGEST) != 0) {
fprintf(stderr, "MD5 hash not as expected - digest %s != %s\n", buf,
EXPECTED_RSA_MD5_HASH_DIGEST);
return 1;
}
sha1_hash = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
if(sha1_hash == NULL) {
print_last_session_error(
"libssh2_hostkey_hash(LIBSSH2_HOSTKEY_HASH_SHA1)");
return 1;
}
calculate_digest(sha1_hash, SHA1_HASH_SIZE, buf, BUFSIZ);
if(strcmp(buf, EXPECTED_RSA_SHA1_HASH_DIGEST) != 0) {
fprintf(stderr, "SHA1 hash not as expected - digest %s != %s\n", buf,
EXPECTED_RSA_SHA1_HASH_DIGEST);
return 1;
}
sha256_hash = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA256);
if(sha256_hash == NULL) {
print_last_session_error(
"libssh2_hostkey_hash(LIBSSH2_HOSTKEY_HASH_SHA256)");
return 1;
}
calculate_digest(sha256_hash, SHA256_HASH_SIZE, buf, BUFSIZ);
if(strcmp(buf, EXPECTED_RSA_SHA256_HASH_DIGEST) != 0) {
fprintf(stderr, "SHA256 hash not as expected - digest %s != %s\n", buf,
EXPECTED_RSA_SHA256_HASH_DIGEST);
return 1;
}
}
else {
fprintf(stderr, "Unexpected type of hostkey: %i\n", type);
return 1;
}
return 0;
}
|
