Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 116 insertions, 0 deletions

diff --git a/src/detect-transform-sha1.c b/src/detect-transform-sha1.c
new file mode 100644
index 0000000..927b25e
--- /dev/null
+++ b/src/detect-transform-sha1.c
@@ -0,0 +1,116 @@
+/* Copyright (C) 2007-2020 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * \file
+ *
+ * \author Victor Julien <victor@inliniac.net>
+ *
+ * Implements the sha1 transformation keyword
+ */
+
+#include "suricata-common.h"
+
+#include "detect.h"
+#include "detect-engine.h"
+#include "detect-engine-prefilter.h"
+#include "detect-parse.h"
+#include "detect-transform-sha1.h"
+
+#include "util-unittest.h"
+#include "util-print.h"
+
+#include "rust.h"
+
+static int DetectTransformToSha1Setup (DetectEngineCtx *, Signature *, const char *);
+#ifdef UNITTESTS
+static void DetectTransformToSha1RegisterTests(void);
+#endif
+static void TransformToSha1(InspectionBuffer *buffer, void *options);
+
+void DetectTransformSha1Register(void)
+{
+    sigmatch_table[DETECT_TRANSFORM_SHA1].name = "to_sha1";
+    sigmatch_table[DETECT_TRANSFORM_SHA1].desc =
+        "convert to sha1 hash of the buffer";
+    sigmatch_table[DETECT_TRANSFORM_SHA1].url =
+        "/rules/transforms.html#to-sha1";
+    sigmatch_table[DETECT_TRANSFORM_SHA1].Setup =
+        DetectTransformToSha1Setup;
+    sigmatch_table[DETECT_TRANSFORM_SHA1].Transform =
+        TransformToSha1;
+#ifdef UNITTESTS
+    sigmatch_table[DETECT_TRANSFORM_SHA1].RegisterTests =
+        DetectTransformToSha1RegisterTests;
+#endif
+    sigmatch_table[DETECT_TRANSFORM_SHA1].flags |= SIGMATCH_NOOPT;
+}
+
+/**
+ *  \internal
+ *  \brief Apply the nocase keyword to the last pattern match, either content or uricontent
+ *  \param det_ctx detection engine ctx
+ *  \param s signature
+ *  \param nullstr should be null
+ *  \retval 0 ok
+ *  \retval -1 failure
+ */
+static int DetectTransformToSha1Setup (DetectEngineCtx *de_ctx, Signature *s, const char *nullstr)
+{
+    SCEnter();
+    if (g_disable_hashing) {
+        SCLogError("SHA1 hashing has been disabled, "
+                   "needed for to_sha1 keyword");
+        SCReturnInt(-1);
+    }
+    int r = DetectSignatureAddTransform(s, DETECT_TRANSFORM_SHA1, NULL);
+    SCReturnInt(r);
+}
+
+static void TransformToSha1(InspectionBuffer *buffer, void *options)
+{
+    const uint8_t *input = buffer->inspect;
+    const uint32_t input_len = buffer->inspect_len;
+    uint8_t output[SC_SHA1_LEN];
+
+    //PrintRawDataFp(stdout, input, input_len);
+    SCSha1HashBuffer(input, input_len, output, sizeof(output));
+    InspectionBufferCopy(buffer, output, sizeof(output));
+}
+
+#ifdef UNITTESTS
+static int DetectTransformToSha1Test01(void)
+{
+    const uint8_t *input = (const uint8_t *)" A B C D ";
+    uint32_t input_len = strlen((char *)input);
+
+    InspectionBuffer buffer;
+    InspectionBufferInit(&buffer, 8);
+    InspectionBufferSetup(NULL, -1, &buffer, input, input_len);
+    PrintRawDataFp(stdout, buffer.inspect, buffer.inspect_len);
+    TransformToSha1(&buffer, NULL);
+    PrintRawDataFp(stdout, buffer.inspect, buffer.inspect_len);
+    InspectionBufferFree(&buffer);
+    PASS;
+}
+
+static void DetectTransformToSha1RegisterTests(void)
+{
+    UtRegisterTest("DetectTransformToSha1Test01",
+            DetectTransformToSha1Test01);
+}
+#endif