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1 | /* $Header$ | |
2 | * | |
3 | * Routines to encrypt ID's | |
4 | * | |
5 | * (c) Copyright 1988 by the Massachusetts Institute of Technology. | |
6 | * For copying and distribution information, please see the file | |
7 | * <mit-copyright.h>. | |
8 | */ | |
9 | ||
10 | #include <mit-copyright.h> | |
11 | #include <strings.h> | |
12 | #include <ctype.h> | |
13 | ||
14 | ||
15 | /* Function Name: RemoveHyphens | |
16 | * Description: Removes all hyphens from the string passed to it. | |
17 | * Arguments: str - the string to remove the hyphes from | |
18 | * Returns: none | |
19 | */ | |
20 | ||
21 | void | |
22 | RemoveHyphens(str) | |
23 | char *str; | |
24 | { | |
25 | char *hyphen; | |
26 | ||
27 | while ((hyphen = index(str, '-')) != (char *)0) | |
28 | (void) strcpy(hyphen, hyphen + 1); | |
29 | } | |
30 | ||
31 | ||
32 | /* Function Name: EncryptMITID | |
33 | * Description: Encrypts an mit ID number. | |
34 | * Arguments: sbuf - the buffer to return the encrypted number in. | |
35 | * idnumber - the id number (string). | |
36 | * first, last - name of the person. | |
37 | * Returns: none. | |
38 | */ | |
39 | ||
40 | void | |
41 | EncryptID(sbuf, idnumber, first, last) | |
42 | char *sbuf, *idnumber, *first, *last; | |
43 | { | |
44 | char salt[3]; | |
45 | extern char *crypt(); | |
46 | ||
47 | RemoveHyphens(idnumber); | |
48 | salt[0] = tolower(last[0]); | |
49 | salt[1] = tolower(first[0]); | |
50 | salt[2] = 0; | |
51 | ||
52 | (void) strcpy(sbuf, crypt(&idnumber[2], salt)); | |
53 | } | |
54 |