'passwd' tool.

1 files changed, 192 insertions, 0 deletions

diff --git a/apps/passwd.c b/apps/passwd.c
new file mode 100644
index 0000000000..4ba68159bc
--- /dev/null
+++ b/apps/passwd.c
@@ -0,0 +1,192 @@
+/* apps/passwd.c */
+
+#if !defined(NO_DES) /* && !defined(prerequisites of other algorithms) */
+
+#include <assert.h>
+#include <string.h>
+
+#include "apps.h"
+
+#include <openssl/bio.h>
+#include <openssl/err.h>
+#include <openssl/evp.h>
+#include <openssl/rand.h>
+
+#ifndef NO_DES
+# include <openssl/des.h>
+#endif
+
+#undef PROG
+#define PROG passwd_main
+
+
+static unsigned const char cov_2char[64]={
+	/* from crypto/des/fcrypt.c */
+	0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
+	0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
+	0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
+	0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
+	0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
+	0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
+	0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
+	0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
+};
+
+/* -crypt        - standard Unix password algorithm (default, only choice)
+ * -salt string  - salt
+ * -quiet        - no warnings
+ * -table        - format output as table
+ */
+
+int MAIN(int argc, char **argv)
+	{
+	int ret = 1;
+	char *salt = NULL, *passwd, **passwds = NULL;
+	char *salt_malloc = NULL, *passwd_malloc = NULL;
+	BIO *out = NULL;
+	int i, badopt, opt_done;
+	int passed_salt = 0, quiet = 0, table = 0;
+	int crypt = 0;
+	size_t pw_maxlen = 0;
+
+	apps_startup();
+
+	if (bio_err == NULL)
+		if ((bio_err=BIO_new(BIO_s_file())) != NULL)
+			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
+	out = BIO_new(BIO_s_file());
+	if (out == NULL)
+		goto err;
+	BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
+
+	badopt = 0, opt_done = 0;
+	i = 0;
+	while (!badopt && !opt_done && argv[++i] != NULL)
+		{
+		if (strcmp(argv[i], "-crypt") == 0)
+			crypt = 1;
+		else if (strcmp(argv[i], "-salt") == 0)
+			{
+			if ((argv[i+1] != NULL) && (salt == NULL))
+				{
+				passed_salt = 1;
+				salt = argv[++i];
+				}
+			else badopt = 1;
+			}
+		else if (strcmp(argv[i], "-quiet") == 0)
+			quiet = 1;
+		else if (strcmp(argv[i], "-table") == 0)
+			table = 1;
+		else if (argv[i][0] == '-')
+			badopt = 1;
+		else
+			/* non-option argument */
+			{
+			passwds = &argv[i];
+			opt_done = 1;
+			}
+		}
+
+	if (crypt /* + algo2 + algo3 + ... */ == 0) /* use default */
+		crypt = 1;
+	if (crypt /* + algo2 + algo3 */ > 1) /* conflict */
+		badopt = 1;
+
+	if (badopt) 
+		{
+		BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
+		BIO_printf(bio_err, "where options are\n");
+		BIO_printf(bio_err, "-crypt             standard Unix password algorithm (default)\n");
+		BIO_printf(bio_err, "-salt string       use provided salt\n");
+		BIO_printf(bio_err, "-quiet             no warnings\n");
+		BIO_printf(bio_err, "-table             format output as table\n");
+		
+		goto err;
+		}
+
+	if (crypt)
+		pw_maxlen = 8;
+	/* else if ... */
+
+	if (passwds == NULL)
+		{
+		/* build a null-terminated list */
+		static char *passwds_static[2] = {NULL, NULL};
+		   
+		passwds = passwds_static;
+		passwd_malloc = Malloc(pw_maxlen + 1);
+		if (passwd_malloc == NULL)
+			goto err;
+		if (EVP_read_pw_string(passwd_malloc, pw_maxlen + 1, "Password: ", 0) != 0)
+			goto err;
+		passwds[0] = passwd_malloc;
+		}
+
+	assert(passwds != NULL);
+	assert(*passwds != NULL);
+	
+	do /* loop over list of passwords */
+		{
+		/* first make sure we have a salt */
+		if (!passed_salt)
+			{
+			if (crypt)
+				{
+				if (salt_malloc == NULL)
+					{
+					salt = salt_malloc = Malloc(3);
+					if (salt_malloc == NULL)
+						goto err;
+					}
+				if (RAND_pseudo_bytes((unsigned char *)salt, 2) < 0)
+					goto err;
+				salt[0] = cov_2char[salt[0] & 0x3f]; /* 6 bits */
+				salt[1] = cov_2char[salt[1] & 0x3f]; /* 6 bits */
+				salt[2] = 0;
+#ifdef CHARSET_EBCDIC
+				ascii2ebcdic(salt, salt, 2); /* des_crypt will convert
+				                              * back to ASCII */
+#endif
+				}
+			/* else if (algo2) ... */
+			}
+		
+		assert(salt != NULL);
+
+		/* truncate password if necessary */
+		passwd = *passwds++;
+		if ((strlen(passwd) > pw_maxlen))
+			{
+			if (!quiet)
+				BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen);
+			passwd[pw_maxlen] = 0;
+			}
+		assert(strlen(passwd) <= pw_maxlen);
+		
+		/* now compute password hash */
+		if (crypt)
+			{
+			char *hash = des_crypt(passwd, salt);
+			if (table)
+				BIO_printf(out, "%s\t%s\n", passwd, hash);
+			else
+				BIO_printf(out, "%s\n", hash);
+			}
+		/* else if (algo2) { ... } else if (algo3) { ... } */
+		else
+			assert(0);
+		}
+	while (*passwds != NULL);
+	
+err:
+	ERR_print_errors(bio_err);
+	if (salt_malloc)
+		Free(salt_malloc);
+	if (passwd_malloc)
+		Free(passwd_malloc);
+	if (out)
+		BIO_free(out);
+	EXIT(ret);
+	}
+#endif