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Annotation of src/usr.bin/tcfs/tcfsgenkey.c, Revision 1.4

1.1       provos      1: /*
                      2:  *     Transparent Cryptographic File System (TCFS) for NetBSD
                      3:  *     Author and mantainer:   Luigi Catuogno [luicat@tcfs.unisa.it]
                      4:  *
                      5:  *     references:             http://tcfs.dia.unisa.it
                      6:  *                             tcfs-bsd@tcfs.unisa.it
                      7:  */
                      8:
                      9: /*
                     10:  *     Base utility set v0.1
                     11:  */
                     12:
                     13: #include <stdio.h>
1.4     ! fgsch      14: #include <stdlib.h>
1.1       provos     15: #include <strings.h>
                     16:
                     17: #include <miscfs/tcfs/tcfs.h>
                     18: #include "tcfslib.h"
                     19: #include "tcfserrors.h"
                     20:
                     21: char *genkey_usage="Usage: %s [OPTION]
                     22: Generate a TCFS key adding it to the user entry into the TCFS database.
                     23:
                     24:   -h       Shows this help\n";
                     25:
                     26: int
                     27: genkey_main (int argn, char *argv[])
                     28: {
                     29:        int val;
                     30:        char *user, *passwd;
                     31:        tcfspwdb *userinfo;
                     32:        unsigned char *newkey, *cryptedkey;
                     33:        tcfspwdb *user_info = NULL;
                     34:
                     35:        /*
                     36:         * Going to check arguments
                     37:         */
                     38:        while ((val = getopt(argn, argv, "h")) != EOF)
                     39:                switch (val) {
                     40:                case 'h':
                     41:                        show_usage(genkey_usage, argv[0]);
                     42:                        exit (OK);
                     43:                        break; /* Useless code */
                     44:                default:
                     45:                        fprintf (stderr, "Try %s --help for more information.\n", argv[0]);
                     46:                        exit (ER_UNKOPT);
                     47:                        break;
                     48:                }
                     49:
                     50:        if (argn - optind)
                     51:                tcfs_error (ER_UNKOPT, NULL);
                     52:
                     53:        /*
                     54:         * Must be root to do all this stuff
                     55:         */
                     56:        if (geteuid())
                     57:                tcfs_error (ER_CUSTOM, "I don't have root privileges!");
                     58:
                     59:        /*
                     60:         * Authenticate user
                     61:         */
                     62:        if (!unix_auth (&user, &passwd, TRUE))
                     63:                tcfs_error (ER_CUSTOM, "Who are you?!");
                     64:
                     65:        if (!tcfs_getpwnam (user, &user_info))
                     66:                tcfs_error (ER_CUSTOM, "You do not have an entry in the TCFS key database.");
                     67:
                     68:        if (strlen(user_info->upw))
                     69:                tcfs_error (ER_CUSTOM,"You already have a TCFS key.");
                     70:
                     71:        /*
                     72:         * Generate a new key for the user.
                     73:         */
                     74:        newkey = gentcfskey ();
                     75:
                     76:        /*
                     77:         * Encrypt the generated key with user password
                     78:         */
1.3       provos     79:        cryptedkey = (char*)calloc(UUKEYSIZE + 1, sizeof(char));
1.1       provos     80:        if (!cryptedkey)
                     81:                tcfs_error (ER_MEM, NULL);
                     82:
                     83:
1.3       provos     84:        if (!tcfs_encrypt_key (passwd, newkey, KEYSIZE, cryptedkey, UUKEYSIZE + 1))
1.1       provos     85:                tcfs_error (ER_MEM, NULL);
                     86:
                     87:        /*
                     88:         * Update TCFS key database
                     89:         */
                     90:        if (!tcfspwdbr_new (&userinfo))
                     91:                tcfs_error (ER_MEM, NULL);
                     92:
                     93:        if (!tcfspwdbr_edit (&userinfo, F_USR|F_PWD, user, cryptedkey))
                     94:                tcfs_error (ER_MEM, NULL);
                     95:
                     96:        /* TODO:
                     97:           if (!change && tcfs_getpwnam (user, &userinfo))
                     98:           tcfs_error (ER_CUSTOM, "Use -c to change the key.");
                     99:        */
                    100:
                    101:        if (!tcfs_putpwnam (user, userinfo, U_CHG))
                    102:                tcfs_error (ER_CUSTOM, "Error: cannot generate key.");
                    103:
                    104:        tcfs_error (ER_CUSTOM, "\nKey succesfully generated.");
                    105: }