annotate gensignkey.c @ 1080:a988f7db337c

add no-writev build
author Matt Johnston <matt@ucc.asn.au>
date Sat, 02 May 2015 22:51:46 +0800
parents 2b62f26cf808
children 2bb4c662d1c2
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) {
983
2b62f26cf808 Open directories O_RDONLY for fsync, add debugging if it fails
Matt Johnston <matt@ucc.asn.au>
parents: 982
diff changeset
44 if (fsync(fd) != 0) {
2b62f26cf808 Open directories O_RDONLY for fsync, add debugging if it fails
Matt Johnston <matt@ucc.asn.au>
parents: 982
diff changeset
45 dropbear_log(LOG_ERR, "fsync of %s failed: %s", filename, strerror(errno));
2b62f26cf808 Open directories O_RDONLY for fsync, add debugging if it fails
Matt Johnston <matt@ucc.asn.au>
parents: 982
diff changeset
46 }
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
47 m_close(fd);
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 return ret;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
50 }
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 /* returns 0 on failure */
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
53 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
54 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
55 switch (keytype) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
56 #ifdef DROPBEAR_RSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
57 case DROPBEAR_SIGNKEY_RSA:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
58 return RSA_DEFAULT_SIZE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
59 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
60 #ifdef DROPBEAR_DSS
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
61 case DROPBEAR_SIGNKEY_DSS:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
62 return DSS_DEFAULT_SIZE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
63 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
64 #ifdef DROPBEAR_ECDSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
65 case DROPBEAR_SIGNKEY_ECDSA_KEYGEN:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
66 return ECDSA_DEFAULT_SIZE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
67 case DROPBEAR_SIGNKEY_ECDSA_NISTP521:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
68 return 521;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
69 case DROPBEAR_SIGNKEY_ECDSA_NISTP384:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
70 return 384;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
71 case DROPBEAR_SIGNKEY_ECDSA_NISTP256:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
72 return 256;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
73 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
74 default:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
75 return 0;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
76 }
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
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
79 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
80 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
81 sign_key * key = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
82 buffer *buf = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
83 int ret = DROPBEAR_FAILURE;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
84 if (bits == 0)
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 bits = get_default_bits(keytype);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
87 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
88
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 /* now we can generate the key */
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
90 key = new_sign_key();
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
92 seedrandom();
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
93
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 switch(keytype) {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 #ifdef DROPBEAR_RSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96 case DROPBEAR_SIGNKEY_RSA:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97 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
98 break;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 #ifdef DROPBEAR_DSS
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101 case DROPBEAR_SIGNKEY_DSS:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
102 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
103 break;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
104 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
105 #ifdef DROPBEAR_ECDSA
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
106 case DROPBEAR_SIGNKEY_ECDSA_KEYGEN:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
107 case DROPBEAR_SIGNKEY_ECDSA_NISTP521:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
108 case DROPBEAR_SIGNKEY_ECDSA_NISTP384:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
109 case DROPBEAR_SIGNKEY_ECDSA_NISTP256:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
110 {
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
111 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
112 keytype = ecdsa_signkey_type(ecckey);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
113 *signkey_key_ptr(key, keytype) = ecckey;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
114 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
115 break;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
116 #endif
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
117 default:
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
118 dropbear_exit("Internal error");
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
119 }
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
120
852
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
121 seedrandom();
7540c0822374 Various cleanups and fixes for warnings
Matt Johnston <matt@ucc.asn.au>
parents: 847
diff changeset
122
846
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
123 buf = buf_new(MAX_PRIVKEY_SIZE);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
124
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
125 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
126 sign_key_free(key);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
127 key = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128 buf_setpos(buf, 0);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
129 ret = buf_writefile(buf, filename);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
130
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 buf_burn(buf);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
132 buf_free(buf);
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
133 buf = NULL;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134 return ret;
b298bb438625 refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
135 }