Mercurial > dropbear

annotate sk-ed25519.c @ 1891:40f8468ad4d4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Allow for DEBUG_TRACE value 0 - 5
author HansH111 <hans@atbas.org>
date Sat, 19 Mar 2022 08:54:25 +0000
parents 35d504d59c05
children 333688ec53d0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1855
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
1 #include "includes.h"
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
2
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
3 #if DROPBEAR_SK_ED25519
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
4
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
5 #include "dbutil.h"
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
6 #include "buffer.h"
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
7 #include "curve25519.h"
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
8 #include "ed25519.h"
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
9
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
10 int buf_sk_ed25519_verify(buffer *buf, const dropbear_ed25519_key *key, const buffer *data_buf, const char* app, unsigned int applen) {
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
11
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
12 int ret = DROPBEAR_FAILURE;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
13 unsigned char *s;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
14 unsigned long slen;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
15 hash_state hs;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
16 unsigned char hash[SHA256_HASH_SIZE];
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
17 buffer *sk_buffer = NULL;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
18 unsigned char flags;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
19 unsigned int counter;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
20
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
21 TRACE(("enter buf_sk_ed25519_verify"))
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
22 dropbear_assert(key != NULL);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
23
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
24 slen = buf_getint(buf);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
25 if (slen != 64 || buf->len - buf->pos < slen) {
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
26 TRACE(("leave buf_sk_ed25519_verify: bad size"))
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
27 goto out;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
28 }
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
29 s = buf_getptr(buf, slen);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
30 buf_incrpos(buf, slen);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
31
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
32 flags = buf_getbyte (buf);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
33 counter = buf_getint (buf);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
34 sk_buffer = buf_new (2*SHA256_HASH_SIZE+5);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
35 sha256_init (&hs);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
36 sha256_process (&hs, app, applen);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
37 sha256_done (&hs, hash);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
38 buf_putbytes (sk_buffer, hash, sizeof (hash));
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
39 buf_putbyte (sk_buffer, flags);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
40 buf_putint (sk_buffer, counter);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
41 sha256_init (&hs);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
42 sha256_process (&hs, data_buf->data, data_buf->len);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
43 sha256_done (&hs, hash);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
44 buf_putbytes (sk_buffer, hash, sizeof (hash));
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
45
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
46 if (dropbear_ed25519_verify(sk_buffer->data, sk_buffer->len,
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
47 s, slen, key->pub) == 0) {
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
48 /* signature is valid */
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
49 TRACE(("leave buf_sk_ed25519_verify: success!"))
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
50 ret = DROPBEAR_SUCCESS;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
51 }
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
52
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
53 out:
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
54 if (sk_buffer) {
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
55 buf_free(sk_buffer);
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
56 }
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
57 TRACE(("leave buf_sk_ed25519_verify: ret %d", ret))
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
58 return ret;
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
59 }
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
60
35d504d59c05 Implement server-side support for sk-ecdsa U2F-backed keys (#142)
egor-duda <egor-duda@users.noreply.github.com>
parents:
diff changeset
61 #endif /* DROPBEAR_SK_ED25519 */