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-rw-r--r--crypt/examples/genpass.c32
-rw-r--r--crypt/examples/mygetpass.c25
-rw-r--r--crypt/examples/testpass.c26
3 files changed, 83 insertions, 0 deletions
diff --git a/crypt/examples/genpass.c b/crypt/examples/genpass.c
new file mode 100644
index 0000000..a7626db
--- /dev/null
+++ b/crypt/examples/genpass.c
@@ -0,0 +1,32 @@
+#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;
+
+ /* Generate a (not very) random seed.
+ You should do it better than this... */
+ seed[0] = time(NULL);
+ seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000);
+
+ /* Turn it into printable characters from `seedchars'. */
+ for (i = 0; i < 8; i++)
+ salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f];
+
+ /* Read in the user's password and encrypt it. */
+ password = crypt(getpass("Password:"), salt);
+
+ /* Print the results. */
+ puts(password);
+ return 0;
+}
diff --git a/crypt/examples/mygetpass.c b/crypt/examples/mygetpass.c
new file mode 100644
index 0000000..6fe06f4
--- /dev/null
+++ b/crypt/examples/mygetpass.c
@@ -0,0 +1,25 @@
+#include <termios.h>
+#include <stdio.h>
+
+ssize_t
+my_getpass (char **lineptr, size_t *n, FILE *stream)
+{
+ struct termios old, new;
+ int nread;
+
+ /* Turn echoing off and fail if we can't. */
+ if (tcgetattr (fileno (stream), &old) != 0)
+ return -1;
+ new = old;
+ new.c_lflag &= ~ECHO;
+ if (tcsetattr (fileno (stream), TCSAFLUSH, &new) != 0)
+ return -1;
+
+ /* Read the password. */
+ nread = getline (lineptr, n, stream);
+
+ /* Restore terminal. */
+ (void) tcsetattr (fileno (stream), TCSAFLUSH, &old);
+
+ return nread;
+}
diff --git a/crypt/examples/testpass.c b/crypt/examples/testpass.c
new file mode 100644
index 0000000..5bd616d
--- /dev/null
+++ b/crypt/examples/testpass.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <crypt.h>
+
+int
+main(void)
+{
+ /* Hashed form of "GNU libc manual". */
+ const char *const pass = "$1$/iSaq7rB$EoUw5jJPPvAPECNaaWzMK/";
+
+ char *result;
+ int ok;
+
+/*@group*/
+ /* Read in the user's password and encrypt it,
+ passing the expected password in as the salt. */
+ result = crypt(getpass("Password:"), pass);
+/*@end group*/
+
+ /* Test the result. */
+ ok = strcmp (result, pass) == 0;
+
+ puts(ok ? "Access granted." : "Access denied.");
+ return ok ? 0 : 1;
+}