src/tinysrp/t_server.c

52   struct t_server * ts;
57   if((ts = malloc(sizeof(struct t_server))) == 0)
60   SHA1Init(&ts->ckhash);
62   ts->index = ent->index;
63   ts->n.len = tce->modulus.len;
64   ts->n.data = ts->nbuf;
65   memcpy(ts->n.data, tce->modulus.data, ts->n.len);
68   SHA1Update(&ctxt, ts->n.data, ts->n.len);
71   ts->g.len = tce->generator.len;
72   ts->g.data = ts->gbuf;
73   memcpy(ts->g.data, tce->generator.data, ts->g.len);
76   SHA1Update(&ctxt, ts->g.data, ts->g.len);
82   SHA1Update(&ts->ckhash, buf1, sizeof(buf1));
88   SHA1Update(&ts->ckhash, buf1, sizeof(buf1));
90   ts->v.len = ent->password.len;
91   ts->v.data = ts->vbuf;
92   memcpy(ts->v.data, ent->password.data, ts->v.len);
94   ts->s.len = ent->salt.len;
95   ts->s.data = ts->saltbuf;
96   memcpy(ts->s.data, ent->salt.data, ts->s.len);
98   SHA1Update(&ts->ckhash, ts->s.data, ts->s.len);
100   ts->b.data = ts->bbuf;
101   ts->B.data = ts->Bbuf;
103   SHA1Init(&ts->hash);
104   SHA1Init(&ts->oldhash);
105   SHA1Init(&ts->oldckhash);
107   return ts;
111 t_servergenexp(ts)
112      struct t_server * ts;
116   if(ts->n.len < BLEN)
117     ts->b.len = ts->n.len;
119     ts->b.len = BLEN;
121   t_random(ts->b.data, ts->b.len);
122   b = BigIntegerFromBytes(ts->b.data, ts->b.len);
123   n = BigIntegerFromBytes(ts->n.data, ts->n.len);
124   g = BigIntegerFromBytes(ts->g.data, ts->g.len);
128   v = BigIntegerFromBytes(ts->v.data, ts->v.len);
133   ts->B.len = BigIntegerToBytes(B, ts->B.data);
141   SHA1Update(&ts->oldckhash, ts->B.data, ts->B.len);
143   return &ts->B;
147 t_servergetkey(ts, clientval)
148      struct t_server * ts;
158   SHA1Update(&ts->ckhash, clientval->data, clientval->len);
159   SHA1Update(&ts->ckhash, ts->B.data, ts->B.len);
162   SHA1Update(&ctxt, ts->B.data, ts->B.len);
166   SHA1Update(&ts->oldhash, clientval->data, clientval->len);
167   SHA1Update(&ts->hash, clientval->data, clientval->len);
169   n = BigIntegerFromBytes(ts->n.data, ts->n.len);
170   b = BigIntegerFromBytes(ts->b.data, ts->b.len);
171   v = BigIntegerFromBytes(ts->v.data, ts->v.len);
209   t_sessionkey(ts->session_key, sbuf, slen);
212   SHA1Update(&ts->oldhash, ts->session_key, sizeof(ts->session_key));
213   SHA1Update(&ts->oldckhash, ts->session_key, sizeof(ts->session_key));
214   SHA1Update(&ts->ckhash, ts->session_key, sizeof(ts->session_key));
216   return ts->session_key;
220 t_serververify(ts, resp)
221     struct t_server * ts;
227   SHA1Final(expected, &ts->oldckhash);
230     SHA1Final(ts->session_response, &ts->oldhash);
233   SHA1Final(expected, &ts->ckhash);
236     SHA1Update(&ts->hash, expected, sizeof(expected));
237     SHA1Update(&ts->hash, ts->session_key, sizeof(ts->session_key));
238     SHA1Final(ts->session_response, &ts->hash);
244 t_serverresponse(ts)
245     struct t_server * ts;
247   return ts->session_response;
251 t_serverclose(ts)
252      struct t_server * ts;
254   memset(ts->bbuf, 0, sizeof(ts->bbuf));
255   memset(ts->vbuf, 0, sizeof(ts->vbuf));
256   memset(ts->saltbuf, 0, sizeof(ts->saltbuf));
257   memset(ts->session_key, 0, sizeof(ts->session_key));
258   free(ts);