From 556c62a21c09ba36254d9a9ebdacce7587a5954e Mon Sep 17 00:00:00 2001
From: Jeffrey Armstrong <jeff@approximatrix.com>
Date: Fri, 1 Jul 2022 13:35:20 -0400
Subject: Added a commandline driven crypt module for messy, old systems.

---
 captain/cryptcl.f90 | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 captain/cryptcl.f90

(limited to 'captain')

diff --git a/captain/cryptcl.f90 b/captain/cryptcl.f90
new file mode 100644
index 0000000..429da26
--- /dev/null
+++ b/captain/cryptcl.f90
@@ -0,0 +1,44 @@
+module m_crypt
+implicit none
+
+contains
+
+    function hash(phrase)
+    use utilities, only: get_one_line_output_shell_command
+    implicit none
+    
+    character(len=*), intent(in)::phrase
+    character(len=:), pointer::hash
+
+    character(len=256)::tempout
+    
+        call get_one_line_output_shell_command('mkpasswd -m sha-512 "'//trim(phrase)//'"', &
+                                               tempout)
+        
+        allocate(character(len=len_trim(tempout)) :: hash)
+        hash = trim(tempout)
+    
+    end function hash
+    
+    function verify_hash(phrase, hashed)
+    use utilities, only: get_one_line_output_shell_command
+    implicit none
+    
+        character(len=*), intent(in)::phrase, hashed
+        logical::verify_hash
+        
+        character(len=256)::tempout
+        character(32)::salt
+        integer::i
+        
+        i = index(hashed(4:len_trim(hashed)), "$")
+        salt = hashed(4:i+2)
+        
+        call get_one_line_output_shell_command('mkpasswd -m sha-512 -S '//trim(salt)//' "'//trim(phrase)//'"', &
+                                               tempout)
+        
+        verify_hash = (trim(tempout) == trim(hashed))
+        
+    end function verify_hash
+    
+end module m_crypt
\ No newline at end of file
-- 
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