From 39b01289671940648914f710708c19334da23c5b Mon Sep 17 00:00:00 2001
From: re-fox <57954766+re-fox@users.noreply.github.com>
Date: Mon, 10 Aug 2020 12:13:39 -0400
Subject: [PATCH] Add files via upload

---
 ...using-luhn-algorithm-with-lookup-table.yml | 68 +++++++++++++++++++
 ...ng-luhn-algorithm-with-no-lookup-table.yml | 67 ++++++++++++++++++
 2 files changed, 135 insertions(+)
 create mode 100644 lib/validate-credit-card-number-using-luhn-algorithm-with-lookup-table.yml
 create mode 100644 lib/validate-credit-card-number-using-luhn-algorithm-with-no-lookup-table.yml

diff --git a/lib/validate-credit-card-number-using-luhn-algorithm-with-lookup-table.yml b/lib/validate-credit-card-number-using-luhn-algorithm-with-lookup-table.yml
new file mode 100644
index 00000000..9e97a5c6
--- /dev/null
+++ b/lib/validate-credit-card-number-using-luhn-algorithm-with-lookup-table.yml
@@ -0,0 +1,68 @@
+rule:
+  meta:
+    name: validate credit card number using luhn algorithm with lookup table
+    lib: true
+    author: "@_re_fox"
+    scope: function
+    examples:
+      - 1d8fd13c890060464019c0f07b928b1a:0x401920
+      - 60abaef3fda131ffa20df480cb3f8029:0x4048e0
+  features:
+    - and:
+      - not: 
+        - characteristic: nzxor
+      - characteristic: loop
+        description: Iterate over CC digits
+      - basic block:
+        - or:
+          - 8 or more:
+            - number: 0x0
+            - number: 0x2
+            - number: 0x4
+            - number: 0x6
+            - number: 0x8
+            - number: 0x1
+            - number: 0x3
+            - number: 0x5
+            - number: 0x7
+            - number: 0x9
+            description: Digital root lookup table
+          - 8 or more:
+            - number: 0x0
+            - number: 0x1
+            - number: 0x2
+            - number: 0x3
+            - number: 0x4
+            - number: 0xfffffffc
+            - number: 0xfffffffd
+            - number: 0xfffffffe
+            - number: 0xffffffff
+            description: Digital root lookup table via neg numbers
+      - basic block:
+        - or:
+          - and:
+            - number: 0x30
+            - mnemonic: sub
+            description: Conversion of chr to int (SUB 0x30) 
+          - and:
+            - mnemonic: lea
+            - offset: -0x30
+            description: Conversion of chr to int (LEA REG,[REG+ -0x30])
+      - basic block:
+        - or:
+          - and:
+            - mnemonic: idiv
+            - mnemonic: cdq
+            - number: 0xa
+            - optional : 
+              - mnemonic: neg
+            description: Final section returning checkum % 10
+          - and:
+            - mnemonic: shr
+            - mnemonic: imul
+            - number: 0x66666667
+            - number: 0x1f
+            - number: 0x2
+            - optional : 
+              - mnemonic: neg
+            description: Compiler optimized returning checkum % 10 
diff --git a/lib/validate-credit-card-number-using-luhn-algorithm-with-no-lookup-table.yml b/lib/validate-credit-card-number-using-luhn-algorithm-with-no-lookup-table.yml
new file mode 100644
index 00000000..8bfc6945
--- /dev/null
+++ b/lib/validate-credit-card-number-using-luhn-algorithm-with-no-lookup-table.yml
@@ -0,0 +1,67 @@
+rule:
+  meta:
+    name: validate credit card number using luhn algorithm with no lookup table
+    lib: true
+    author: "@_re_fox"
+    scope: function
+    examples:
+      - 6fcc13563aad936c7d0f3165351cb453:0x4026C0
+  features:
+    - and:
+      - not: 
+        - characteristic: nzxor
+      - characteristic: loop
+        description: Iterate over CC digits
+      - or:
+        - basic block:
+          - and:
+            - or:
+              - and:
+                - mnemonic: add
+              - and:
+                - mnemonic: shl
+                - number: 0x1 
+            - mnemonic: cmp
+            - number: 0x9
+            description: Digital Root check number*2 < 0x9 
+        - and:
+          - basic block:
+            - and:
+              - mnemonic: cmp
+              - number: 0x9
+              description: Compare number to 0x9 for Digital Root
+          - basic block:
+            - or:
+              - mnemonic: add
+              - and:
+                - mnemonic: shl
+                - number: 0x1
+              description: 2*Number for Digital Root
+      - basic block:
+        - or:
+          - and:
+            - number: 0x30
+            - mnemonic: sub
+            description: Conversion of chr to int (SUB 0x30) 
+          - and:
+            - mnemonic: lea
+            - offset: -0x30
+            description: Conversion of chr to int (LEA REG,[REG+ -0x30])
+      - basic block:
+        - or:
+          - and:
+            - mnemonic: idiv
+            - mnemonic: cdq
+            - number: 0xa
+            - optional : 
+              - mnemonic: neg
+            description: Final section returning checkum % 10 
+          - and:
+            - mnemonic: shr
+            - mnemonic: imul
+            - number: 0x66666667
+            - number: 0x1f
+            - number: 0x2
+            - optional : 
+              - mnemonic: neg
+            description: Compiler optimized returning checkum % 10