Mercurial > dropbear

annotate gensignkey.c @ 951:9a48d8bcfeed

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added signature for changeset 96584b934d04
author Matt Johnston <matt@ucc.asn.au>
date Sun, 27 Jul 2014 23:11:52 +0800
parents 6e6ae84d3dba
children fd2e8bbb0333
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
1 #include "includes.h"
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
2 #include "dbutil.h"
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
3 #include "buffer.h"
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
4 #include "ecdsa.h"
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
5 #include "genrsa.h"
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
6 #include "gendss.h"
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
7 #include "signkey.h"
858
220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h
Matt Johnston <matt@ucc.asn.au>
parents: 857
diff changeset
8 #include "dbrandom.h"
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
9
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
10 #define RSA_DEFAULT_SIZE 2048
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
11 #define DSS_DEFAULT_SIZE 1024
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
12
857
c19acba28590 use oldstyle comments
Matt Johnston <matt@ucc.asn.au>
parents: 855
diff changeset
13 /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
14 static int buf_writefile(buffer * buf, const char * filename) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
15 int ret = DROPBEAR_FAILURE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
16 int fd = -1;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
17
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
18 fd = open(filename, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
19 if (fd < 0) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
20 dropbear_log(LOG_ERR, "Couldn't create new file %s: %s",
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
21 filename, strerror(errno));
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
22 goto out;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
23 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
24
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
25 /* write the file now */
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
26 while (buf->pos != buf->len) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
27 int len = write(fd, buf_getptr(buf, buf->len - buf->pos),
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
28 buf->len - buf->pos);
888
6e6ae84d3dba Fix check for EINTR
Matt Johnston <matt@ucc.asn.au>
parents: 858
diff changeset
29 if (len == -1 && errno == EINTR) {
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
30 continue;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
31 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
32 if (len <= 0) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
33 dropbear_log(LOG_ERR, "Failed writing file %s: %s",
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
34 filename, strerror(errno));
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
35 goto out;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
36 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
37 buf_incrpos(buf, len);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
38 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
39
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
40 ret = DROPBEAR_SUCCESS;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
41
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
42 out:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
43 if (fd >= 0) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
44 m_close(fd);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
45 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
46 return ret;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
48
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
49 /* returns 0 on failure */
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 static int get_default_bits(enum signkey_type keytype)
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
51 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
52 switch (keytype) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53 #ifdef DROPBEAR_RSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
54 case DROPBEAR_SIGNKEY_RSA:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55 return RSA_DEFAULT_SIZE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 #ifdef DROPBEAR_DSS
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58 case DROPBEAR_SIGNKEY_DSS:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 return DSS_DEFAULT_SIZE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61 #ifdef DROPBEAR_ECDSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
62 case DROPBEAR_SIGNKEY_ECDSA_KEYGEN:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63 return ECDSA_DEFAULT_SIZE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64 case DROPBEAR_SIGNKEY_ECDSA_NISTP521:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 return 521;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 case DROPBEAR_SIGNKEY_ECDSA_NISTP384:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67 return 384;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 case DROPBEAR_SIGNKEY_ECDSA_NISTP256:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 return 256;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
71 default:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72 return 0;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76 int signkey_generate(enum signkey_type keytype, int bits, const char* filename)
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
77 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
78 sign_key * key = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 buffer *buf = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
80 int ret = DROPBEAR_FAILURE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81 if (bits == 0)
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 bits = get_default_bits(keytype);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
85
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
86 /* now we can generate the key */
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 key = new_sign_key();
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
89 seedrandom();
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
90
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91 switch(keytype) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92 #ifdef DROPBEAR_RSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93 case DROPBEAR_SIGNKEY_RSA:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 key->rsakey = gen_rsa_priv_key(bits);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 break;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97 #ifdef DROPBEAR_DSS
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
98 case DROPBEAR_SIGNKEY_DSS:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99 key->dsskey = gen_dss_priv_key(bits);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 break;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102 #ifdef DROPBEAR_ECDSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
103 case DROPBEAR_SIGNKEY_ECDSA_KEYGEN:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104 case DROPBEAR_SIGNKEY_ECDSA_NISTP521:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 case DROPBEAR_SIGNKEY_ECDSA_NISTP384:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106 case DROPBEAR_SIGNKEY_ECDSA_NISTP256:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 ecc_key *ecckey = gen_ecdsa_priv_key(bits);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 keytype = ecdsa_signkey_type(ecckey);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110 *signkey_key_ptr(key, keytype) = ecckey;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
112 break;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
114 default:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
115 dropbear_exit("Internal error");
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
117
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
118 seedrandom();
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
119
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
120 buf = buf_new(MAX_PRIVKEY_SIZE);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
121
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
122 buf_put_priv_key(buf, key, keytype);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123 sign_key_free(key);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124 key = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125 buf_setpos(buf, 0);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
126 ret = buf_writefile(buf, filename);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128 buf_burn(buf);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129 buf_free(buf);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130 buf = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 return ret;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132 }