1 2277c5d7 2004-03-21 devnull #include "dat.h"
2 2277c5d7 2004-03-21 devnull #include <mp.h>
3 2277c5d7 2004-03-21 devnull #include <libsec.h>
5 2277c5d7 2004-03-21 devnull typedef struct Sshrsastate Sshrsastate;
9 2277c5d7 2004-03-21 devnull CWritechal,
10 2277c5d7 2004-03-21 devnull CReadresp,
12 2277c5d7 2004-03-21 devnull struct State
14 2277c5d7 2004-03-21 devnull RSApriv *priv;
16 2277c5d7 2004-03-21 devnull mpint *resp;
17 2277c5d7 2004-03-21 devnull int phase;
20 2277c5d7 2004-03-21 devnull static RSApriv*
21 2277c5d7 2004-03-21 devnull readrsapriv(char *s)
23 2277c5d7 2004-03-21 devnull RSApriv *priv;
25 2277c5d7 2004-03-21 devnull priv = rsaprivalloc();
27 2277c5d7 2004-03-21 devnull strtoul(s, &s, 10);
28 2277c5d7 2004-03-21 devnull if((priv->pub.ek=strtomp(s, &s, 16, nil)) == nil)
29 2277c5d7 2004-03-21 devnull goto Error;
30 2277c5d7 2004-03-21 devnull if((priv->dk=strtomp(s, &s, 16, nil)) == nil)
31 2277c5d7 2004-03-21 devnull goto Error;
32 2277c5d7 2004-03-21 devnull if((priv->pub.n=strtomp(s, &s, 16, nil)) == nil)
33 2277c5d7 2004-03-21 devnull goto Error;
34 2277c5d7 2004-03-21 devnull if((priv->p=strtomp(s, &s, 16, nil)) == nil)
35 2277c5d7 2004-03-21 devnull goto Error;
36 2277c5d7 2004-03-21 devnull if((priv->q=strtomp(s, &s, 16, nil)) == nil)
37 2277c5d7 2004-03-21 devnull goto Error;
38 2277c5d7 2004-03-21 devnull if((priv->kp=strtomp(s, &s, 16, nil)) == nil)
39 2277c5d7 2004-03-21 devnull goto Error;
40 2277c5d7 2004-03-21 devnull if((priv->kq=strtomp(s, &s, 16, nil)) == nil)
41 2277c5d7 2004-03-21 devnull goto Error;
42 2277c5d7 2004-03-21 devnull if((priv->c2=strtomp(s, &s, 16, nil)) == nil)
43 2277c5d7 2004-03-21 devnull goto Error;
45 2277c5d7 2004-03-21 devnull return priv;
48 2277c5d7 2004-03-21 devnull rsaprivfree(priv);
49 2277c5d7 2004-03-21 devnull return nil;
53 2277c5d7 2004-03-21 devnull sshinit(Fsstate *fss,
54 2277c5d7 2004-03-21 devnull sshrsaopen(Key *k, char*, int client)
56 2277c5d7 2004-03-21 devnull Sshrsastate *s;
58 2277c5d7 2004-03-21 devnull fmtinstall('B', mpconv);
59 2277c5d7 2004-03-21 devnull assert(client);
60 2277c5d7 2004-03-21 devnull s = emalloc(sizeof *s);
61 2277c5d7 2004-03-21 devnull s->priv = readrsapriv(s_to_c(k->data));
62 2277c5d7 2004-03-21 devnull s->k = k;
63 2277c5d7 2004-03-21 devnull if(s->priv == nil){
64 2277c5d7 2004-03-21 devnull agentlog("error parsing ssh key %s", k->file);
66 2277c5d7 2004-03-21 devnull return nil;
68 2277c5d7 2004-03-21 devnull return s;
72 2277c5d7 2004-03-21 devnull sshrsaread(void *va, void *buf, int n)
74 2277c5d7 2004-03-21 devnull Sshrsastate *s;
77 2277c5d7 2004-03-21 devnull switch(s->phase){
78 2277c5d7 2004-03-21 devnull case Readpub:
79 2277c5d7 2004-03-21 devnull s->phase = Done;
80 2277c5d7 2004-03-21 devnull return snprint(buf, n, "%B", s->priv->pub.n);
81 2277c5d7 2004-03-21 devnull case Readresp:
82 2277c5d7 2004-03-21 devnull s->phase = Done;
83 2277c5d7 2004-03-21 devnull return snprint(buf, n, "%B", s->resp);
85 2277c5d7 2004-03-21 devnull return 0;
90 2277c5d7 2004-03-21 devnull sshrsawrite(void *va, void *vbuf, int n)
92 2277c5d7 2004-03-21 devnull mpint *m;
93 2277c5d7 2004-03-21 devnull char *buf;
94 2277c5d7 2004-03-21 devnull Sshrsastate *s;
97 2277c5d7 2004-03-21 devnull if((s->k->flags&Fconfirmuse) && confirm("ssh use") < 0)
98 2277c5d7 2004-03-21 devnull return -1;
100 2277c5d7 2004-03-21 devnull buf = emalloc(n+1);
101 2277c5d7 2004-03-21 devnull memmove(buf, vbuf, n);
102 2277c5d7 2004-03-21 devnull buf[n] = '\0';
103 2277c5d7 2004-03-21 devnull m = strtomp(buf, nil, 16, nil);
104 2277c5d7 2004-03-21 devnull free(buf);
105 2277c5d7 2004-03-21 devnull if(m == nil){
106 2277c5d7 2004-03-21 devnull werrstr("bad bignum");
107 2277c5d7 2004-03-21 devnull return -1;
110 2277c5d7 2004-03-21 devnull agentlog("ssh use");
111 2277c5d7 2004-03-21 devnull m = rsadecrypt(s->priv, m, m);
112 2277c5d7 2004-03-21 devnull s->resp = m;
113 2277c5d7 2004-03-21 devnull s->phase = Readresp;
114 2277c5d7 2004-03-21 devnull return n;
118 2277c5d7 2004-03-21 devnull sshrsaclose(void *v)
120 2277c5d7 2004-03-21 devnull Sshrsastate *s;
123 2277c5d7 2004-03-21 devnull rsaprivfree(s->priv);
124 2277c5d7 2004-03-21 devnull mpfree(s->resp);
125 2277c5d7 2004-03-21 devnull free(s);
128 2277c5d7 2004-03-21 devnull Proto sshrsa = {
129 2277c5d7 2004-03-21 devnull .name= "ssh-rsa",
130 2277c5d7 2004-03-21 devnull .perm= 0666,
131 2277c5d7 2004-03-21 devnull .open= sshrsaopen,
132 2277c5d7 2004-03-21 devnull .read= sshrsaread,
133 2277c5d7 2004-03-21 devnull .write= sshrsawrite,
134 2277c5d7 2004-03-21 devnull .close= sshrsaclose,