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annotate sqlickrypt.c @ 145:3308eaa00c91

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Use SVG for the bell icon instead of PNG. Browsers that support WebSockets tend to support SVG too. This also removes the need to install Inkscape to convert the file to PNG.
author John "Elwin" Edwards
date Thu, 31 Oct 2013 20:44:35 -0700
parents f1676e81c80a
children bc69717ff386
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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4 #include <ctype.h>
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5 #include <sqlite3.h>
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6 #include <unistd.h>
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7 #include <crypt.h>
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8
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9 #define DATABASE "/dgldir/dgamelaunch.db"
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10 #define IBUFSIZE 200
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11 #define RANDOMSRC "/dev/urandom"
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12
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13 /* General idea for return status:
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14 * 0: success
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15 * 1: password check failed
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16 * 2: username not found
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17 * 3: database error
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18 * 4: invalid input
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19 */
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20
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21 /* Opens the database and, less obviously, initializes a statement. */
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22 int opendb(sqlite3 **dbp, sqlite3_stmt **stmtp, char *query) {
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23 int status;
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24 status = sqlite3_open(DATABASE, dbp);
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25 if (status) {
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26 sqlite3_close(*dbp);
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27 exit(3);
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28 }
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29 sqlite3_prepare_v2(*dbp, query, -1, stmtp, NULL);
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30 if (*stmtp == NULL) {
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31 sqlite3_close(*dbp);
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32 exit(3);
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33 }
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34 return 0;
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35 }
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36
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37 void cleanup(sqlite3 *db, sqlite3_stmt *stmt, int status) {
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38 if (stmt)
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39 sqlite3_finalize(stmt);
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40 sqlite3_close(db);
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41 if (status)
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42 exit(status);
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43 return;
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44 }
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45
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46 char encode64(unsigned char c) {
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47 if (c < 26)
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48 return 'a' + c;
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49 else if (c < 52)
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50 return 'A' + c - 26;
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51 else if (c < 62)
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52 return '0' + c - 52;
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53 else if (c == 62)
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54 return '.';
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55 else
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56 return '/';
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57 }
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58
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59 /* Initializes a SHA-512 salt. salt must contain at least 20 bytes. */
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60 void setsalt(char *salt) {
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61 unsigned char rnbytes[3], rnvals[4];
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62 FILE *urandom;
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63 int loop;
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64 salt[0] = salt[2] = salt[19] = '$'; /* Delimiters */
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65 salt[1] = '6'; /* SHA-512 */
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66 urandom = fopen(RANDOMSRC, "r");
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67 for (loop = 0; loop < 4; loop++) {
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68 fread(rnbytes, 1, 3, urandom);
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69 rnvals[0] = rnbytes[0] >> 2;
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70 rnvals[1] = ((rnbytes[0] & 0x03) << 4) | ((rnbytes[1] & 0xf0) >> 4);
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71 rnvals[2] = ((rnbytes[1] & 0x0f) << 2) | ((rnbytes[2] & 0xc0) >> 6);
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72 rnvals[3] = rnbytes[2] & 0x3f;
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73 salt[loop * 4 + 3] = encode64(rnvals[0]);
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74 salt[loop * 4 + 4] = encode64(rnvals[1]);
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75 salt[loop * 4 + 5] = encode64(rnvals[2]);
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76 salt[loop * 4 + 6] = encode64(rnvals[3]);
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77 }
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78 fclose(urandom);
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79 }
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80
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81 int check(char *uname, char *pw) {
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82 char *pwhash, *comphash;
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83 char *query = "SELECT password FROM dglusers WHERE username=?;";
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