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presharedServer.c (3057B)
1 #! /usr/bin/env sheepy
2
3 #include "libsheepyObject.h"
4
5 #include <sys/socket.h>
6 #include <netinet/in.h>
7
8 #include "sel.h"
9
10 int main(int ac, char **av){
11
12 setLogMode(LOG_FUNC);
13
14 if (not selInit()) ret 1;
15
16 // load keys
17 const char* clientSecretFilename = "presharedClientSecret.bin";
18 const char* clientPublicFilename = "presharedClientPublic.bin";
19 const char* serverSecretFilename = "presharedServerSecret.bin";
20 const char* serverPublicFilename = "presharedServerPublic.bin";
21 keyst clientKeys = init0Var;
22 keyst serverKeys = init0Var;
23
24 if (isPath(serverPublicFilename) and isPath(serverSecretFilename) and isPath(clientPublicFilename)) {
25 logI("Loading server keys");
26 pError0(bLReadFile(serverSecretFilename, serverKeys.secretKey, sizeof(serverKeys.secretKey)));
27 pError0(bLReadFile(serverPublicFilename, serverKeys.publicKey, sizeof(serverKeys.publicKey)));
28 pError0(bLReadFile(clientPublicFilename, serverKeys.remotePublicKey, sizeof(serverKeys.remotePublicKey)));
29 }
30 else {
31 logE("Failed to load the server keys. Stop. Run ./presharedClient.c generate keys");
32 ret 1;
33 }
34
35
36 // start event loop
37 int sock;
38 struct sockaddr_in server;
39 int mysock;
40 char buf[128*1024];
41 int rval;
42
43 sock = socket(AF_INET, SOCK_STREAM, 0);
44 if (sock < 0){
45 perror("Failed to create socket");
46 ret 1;
47 }
48
49 server.sin_family = AF_INET;
50 server.sin_addr.s_addr = INADDR_ANY;
51 server.sin_port = htons(5000);
52
53 if (bind(sock, (struct sockaddr *) &server, sizeof(server))){
54 perror("bind failed");
55 ret 1;
56 }
57
58 listen(sock, 5);
59
60 forever {
61 mysock = accept(sock, (struct sockaddr *)0, 0);
62 if (mysock == -1)
63 perror("accept failed");
64 else {
65
66 bool snd(void *buf, size_t sz) {
67 logVarG(sz);
68 if(send(mysock, buf, sz, 0) < 0){
69 perror("send failed");
70 close(mysock);
71 ret no;
72 }
73 ret yes;
74 }
75
76 bool rcv(void *buf, size_t sz) {
77 memset(buf, 0, sizeof(buf));
78 rval = recv(mysock, buf, sizeof(buf), 0);
79 if (rval < 0) {
80 perror("reading message");
81 ret no;
82 }
83 else if (rval == 0) {
84 logI("Ending connection");
85 close(mysock);
86 ret no;
87 }
88 logVarG(rval);
89 ret yes;
90 }
91
92 // get encrypted message
93 int len;
94 if (!rcv(&len, sizeof(len))) continue;
95 rval = recv(mysock, buf, len, MSG_WAITALL);
96 if (rval < 0) {
97 perror("reading message");
98 close(mysock);
99 continue;
100 }
101 else if (rval == 0) {
102 logI("Ending connection");
103 close(mysock);
104 continue;
105 }
106 logVarG(rval);
107
108 u8 decrypted[1000];
109 len = selPublicDecrypt(decrypted, sizeof(decrypted), buf, rval, &serverKeys);
110
111 if (!len) {
112 logE("failed to decrypt");
113 close(mysock);
114 continue;
115 }
116
117 decrypted[len] = 0;
118
119 logI("decrypted: %s", decrypted);
120
121 close(mysock);
122 }
123 }
124 }
125 // vim: set expandtab ts=2 sw=2: