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-rw-r--r--crypt/genpass.c.texi32
1 files changed, 32 insertions, 0 deletions
diff --git a/crypt/genpass.c.texi b/crypt/genpass.c.texi
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+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <crypt.h>
+
+int
+main(void)
+@{
+ unsigned long seed[2];
+ char salt[] = "$1$........";
+ const char *const seedchars =
+ "./0123456789ABCDEFGHIJKLMNOPQRST"
+ "UVWXYZabcdefghijklmnopqrstuvwxyz";
+ char *password;
+ int i;
+
+ /* @r{Generate a (not very) random seed.
+ You should do it better than this...} */
+ seed[0] = time(NULL);
+ seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000);
+
+ /* @r{Turn it into printable characters from `seedchars'.} */
+ for (i = 0; i < 8; i++)
+ salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f];
+
+ /* @r{Read in the user's password and encrypt it.} */
+ password = crypt(getpass("Password:"), salt);
+
+ /* @r{Print the results.} */
+ puts(password);
+ return 0;
+@}