des encrypt: fix goof with NUL byte added at the end as '.'

diff --git a/libbb/pw_encrypt_des.c b/libbb/pw_encrypt_des.c
index 52548d62395a9b8d1c132e38bf79ddc7fc05c05d..c8e02ddff82f2424309f0f0b491c441c23e61ebd 100644 (file)
--- a/libbb/pw_encrypt_des.c
+++ b/libbb/pw_encrypt_des.c
@@ -778,8 +778,10 @@ des_crypt(struct des_ctx *ctx, char output[DES_OUT_BUFSIZE],
        to64_msb_first(output + 2, (r0 >> 8));
        /* bits 7..0 of r0 and 31..16 of r1 */
        to64_msb_first(output + 6, (r0 << 16) | (r1 >> 16));
-       /* (bits 15..0 of r1 + 00) and NUL byte */
+       /* bits 15..0 of r1 and two zero bits (plus extra zero byte) */
        to64_msb_first(output + 10, (r1 << 8));
+       /* extra zero byte is encoded as '.', fixing it */
+       output[13] = '\0';
 #endif
 
        return output;