From 3287df096c3f2bde322d08b38dc4e66221841324 Mon Sep 17 00:00:00 2001
From: Jeff Lucovsky <jlucovsky@oisf.net>
Date: Mon, 13 Jan 2025 08:49:50 -0500
Subject: [PATCH] test/entropy: Basic entropy keyword test

This commit adds a basic test of the entropy keyword.
---
 tests/entropy/entropy-01/README.md  |   1 +
 tests/entropy/entropy-01/input.pcap | Bin 0 -> 1397 bytes
 tests/entropy/entropy-01/test.rules |  12 +++++++
 tests/entropy/entropy-01/test.yaml  |  49 ++++++++++++++++++++++++++++
 4 files changed, 62 insertions(+)
 create mode 100644 tests/entropy/entropy-01/README.md
 create mode 100644 tests/entropy/entropy-01/input.pcap
 create mode 100644 tests/entropy/entropy-01/test.rules
 create mode 100644 tests/entropy/entropy-01/test.yaml

diff --git a/tests/entropy/entropy-01/README.md b/tests/entropy/entropy-01/README.md
new file mode 100644
index 000000000..c1924f917
--- /dev/null
+++ b/tests/entropy/entropy-01/README.md
@@ -0,0 +1 @@
+This test checks the entropy keyword with a comparison against HTTP file data.
diff --git a/tests/entropy/entropy-01/input.pcap b/tests/entropy/entropy-01/input.pcap
new file mode 100644
index 0000000000000000000000000000000000000000..c84b2df7002156fe463a8b3f2d3cfa87a414bbab
GIT binary patch
literal 1397
zc-noG%TF6e9LHx30kX<UBq!R_9HNK>@U9;**w_x(yzygeF99k9TGnHG<Mpobj<K->
zBJC~WjzW?{)kbb}qltP!l~8l!R#jEno~o9%5;-LK14?JsSOv>sHLIEV?dUVV@9(ic
zz5ezK8)yfO=kyc+hRki(PEzp@3qoW~UvTaAXXw~=xKj%Zc7bsK+{~XNV7p`VDZ8{{
zW0%5@4zB|7fP3(c9^SS=u#W+-wO@I~w6%3HOuLN|e>q32v+CSB5r7de(((B=rBNyn
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zj<p(UfCeJ6o+-&0<by~bm`nB}onxmAliW})m+jSRI$uuPu~FdIu%YWnp+Fy0G{Zz3
zJ7=Qez-R{P<apGms+uPAckKe~omcggQ8r;rf*!jt4CmwX9``UTuKQeGyKoy$A|+?=
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z*&Yjy2;ry|<@?<|i?Y;`($iV%6#;039y$d9#%DP;iHhr}=!4TSgp+FC$_=a=F9s=G
z4-zq95}|<z(la>ggF~MGZPG>ooy#T1j>(u9CW>l5bPmE9Str*zUC`<9Ib1%604JkT
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rzO{odE@k~=vA$}_x=vWj=UK}yE-R|DpV&@Q%-#^*7A>k@zXRYudZ&`u

literal 0
Hc-jL100001

diff --git a/tests/entropy/entropy-01/test.rules b/tests/entropy/entropy-01/test.rules
new file mode 100644
index 000000000..308d9ca51
--- /dev/null
+++ b/tests/entropy/entropy-01/test.rules
@@ -0,0 +1,12 @@
+# The entropy value is 4.137370175000773
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value > 4; sid:1;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value >= 4; sid:2;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value >= 5; sid:3;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value 4-5; sid:4;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value !4-5; sid:5;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value < 4; sid:6;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value != 4; sid:7;)
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: value = 4; sid:8;)
+# The entropy value is 4.150007324019584
+alert http any any -> any any (msg:"entropy simple test"; file.data; entropy: offset 10, value > 4.14; sid:10;)
+
diff --git a/tests/entropy/entropy-01/test.yaml b/tests/entropy/entropy-01/test.yaml
new file mode 100644
index 000000000..5fcc51ca5
--- /dev/null
+++ b/tests/entropy/entropy-01/test.yaml
@@ -0,0 +1,49 @@
+requires:
+  min-version: 8
+
+checks:
+  - filter:
+      count: 1
+      match:
+        event_type: alert
+        alert.signature_id: 1
+  - filter:
+      count: 1
+      match:
+        event_type: alert
+        alert.signature_id: 2
+  - filter:
+      count: 0
+      match:
+        event_type: alert
+        alert.signature_id: 3
+  - filter:
+      count: 1
+      match:
+        event_type: alert
+        alert.signature_id: 4
+  - filter:
+      count: 0
+      match:
+        event_type: alert
+        alert.signature_id: 5
+  - filter:
+      count: 0
+      match:
+        event_type: alert
+        alert.signature_id: 6
+  - filter:
+      count: 1
+      match:
+        event_type: alert
+        alert.signature_id: 7
+  - filter:
+      count: 0
+      match:
+        event_type: alert
+        alert.signature_id: 8
+  - filter:
+      count: 1
+      match:
+        event_type: alert
+        alert.signature_id: 10
-- 
2.47.2