From d847f0651ab4304129145b55353501636b4e4728 Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Tue, 4 Aug 2020 11:03:49 +0200
Subject: [PATCH] gpg: Add level 16 to --gen-random

* g10/gpg.c (main): Add that hack.
--

This is an yet undocumented hack to allow printing hex encoded random
number with gpg.  The level is forced to be 1 which is is good for
almost all uses.  Note that --armor is ignored.

Signed-off-by: Werner Koch <wk@gnupg.org>
---
 g10/gpg.c | 71 ++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 42 insertions(+), 29 deletions(-)

diff --git a/g10/gpg.c b/g10/gpg.c
index ce9197574..7f219e869 100644
--- a/g10/gpg.c
+++ b/g10/gpg.c
@@ -4877,42 +4877,55 @@ main (int argc, char **argv)
 
       case aGenRandom:
 	{
-	    int level = argc ? atoi(*argv):0;
-	    int count = argc > 1 ? atoi(argv[1]): 0;
-	    int endless = !count;
+          int level = argc ? atoi(*argv):0;
+          int count = argc > 1 ? atoi(argv[1]): 0;
+          int endless = !count;
+          int hexhack = (level == 16);
 
-	    if( argc < 1 || argc > 2 || level < 0 || level > 2 || count < 0 )
-		wrong_args("--gen-random 0|1|2 [count]");
+          if (hexhack)
+            level = 1;
 
-	    while( endless || count ) {
-		byte *p;
-                /* We need a multiple of 3, so that in case of
-                   armored output we get a correct string.  No
-                   linefolding is done, as it is best to leave this to
-                   other tools */
-		size_t n = !endless && count < 99? count : 99;
+          if (argc < 1 || argc > 2 || level < 0 || level > 2 || count < 0)
+            wrong_args ("--gen-random 0|1|2 [count]");
 
-		p = gcry_random_bytes (n, level);
+          while (endless || count)
+            {
+              byte *p;
+              /* We need a multiple of 3, so that in case of armored
+               * output we get a correct string.  No linefolding is
+               * done, as it is best to leave this to other tools */
+              size_t n = !endless && count < 99? count : 99;
+              size_t nn;
+
+              p = gcry_random_bytes (n, level);
 #ifdef HAVE_DOSISH_SYSTEM
-		setmode ( fileno(stdout), O_BINARY );
+              setmode ( fileno(stdout), O_BINARY );
 #endif
-                if (opt.armor) {
-                    char *tmp = make_radix64_string (p, n);
-                    es_fputs (tmp, es_stdout);
-                    xfree (tmp);
-                    if (n%3 == 1)
-                      es_putc ('=', es_stdout);
-                    if (n%3)
-                      es_putc ('=', es_stdout);
-                } else {
-                    es_fwrite( p, n, 1, es_stdout );
+              if (hexhack)
+                {
+                  for (nn = 0; nn < n; nn++)
+                    es_fprintf (es_stdout, "%02x", p[nn]);
                 }
-		xfree(p);
-		if( !endless )
-		    count -= n;
+              else if (opt.armor)
+                {
+                  char *tmp = make_radix64_string (p, n);
+                  es_fputs (tmp, es_stdout);
+                  xfree (tmp);
+                  if (n%3 == 1)
+                    es_putc ('=', es_stdout);
+                  if (n%3)
+                    es_putc ('=', es_stdout);
+                }
+              else
+                {
+                  es_fwrite( p, n, 1, es_stdout );
+                }
+              xfree(p);
+              if (!endless)
+                count -= n;
 	    }
-            if (opt.armor)
-              es_putc ('\n', es_stdout);
+          if (opt.armor || hexhack)
+            es_putc ('\n', es_stdout);
 	}
 	break;