feat: report unknowns in sbom (#2998)

Signed-off-by: Keith Zantow <kzantow@gmail.com>
Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>
Co-authored-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/pkg/cataloger/binary/test-fixtures/elf-test-fixtures/Dockerfile

@@ -5,9 +5,11 @@ RUN dnf update -y; \
 	dnf clean all
 RUN mkdir -p /usr/local/bin/elftests/elfbinwithnestedlib
 RUN mkdir -p /usr/local/bin/elftests/elfbinwithsisterlib
+RUN mkdir -p /usr/local/bin/elftests/elfbinwithcorrupt
 
 COPY ./elfbinwithnestedlib /usr/local/bin/elftests/elfbinwithnestedlib
 COPY ./elfbinwithsisterlib /usr/local/bin/elftests/elfbinwithsisterlib
+COPY ./elfbinwithcorrupt /usr/local/bin/elftests/elfbinwithcorrupt
 
 ENV LD_LIBRARY_PATH=/usr/local/bin/elftests/elfbinwithnestedlib/bin/lib
 
@@ -16,6 +18,8 @@ RUN make
 
 WORKDIR /usr/local/bin/elftests/elfbinwithsisterlib
 RUN make
+WORKDIR /usr/local/bin/elftests/elfbinwithcorrupt
+RUN make
 
 # let's make the test image smaller, since we only require the built binaries and supporting libraries
 FROM busybox:1.36.1-musl

syft/pkg/cataloger/binary/test-fixtures/elf-test-fixtures/elfbinwithcorrupt/elfsrc/hello_world.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+#include "hello_world.h"
+
+void print_hello_world() {
+    std::cout << "Hello, World!" << std::endl;
+}

syft/pkg/cataloger/binary/test-fixtures/elf-test-fixtures/elfbinwithcorrupt/elfsrc/hello_world.h

@@ -0,0 +1,8 @@
+
+#ifndef HELLO_WORLD_H
+#define HELLO_WORLD_H
+
+// Function declaration for printing "Hello, World!" to stdout
+void print_hello_world();
+
+#endif // HELLO_WORLD_H

syft/pkg/cataloger/binary/test-fixtures/elf-test-fixtures/elfbinwithcorrupt/elfsrc/makefile

@@ -0,0 +1,48 @@
+LDFLAGS := -L/lib64 -lstdc++
+
+SRC_DIR := ./
+BUILD_DIR := ../build
+BIN_DIR := ../bin
+LIB_DIR := $(BIN_DIR)/lib
+
+LIB_NAME := hello_world
+LIB_SRC := $(SRC_DIR)/hello_world.cpp
+LIB_OBJ := $(BUILD_DIR)/$(LIB_NAME).o
+LIB_SO := $(LIB_DIR)/lib$(LIB_NAME).so
+
+EXECUTABLE := elfbinwithnestedlib
+EXEC_SRC := $(SRC_DIR)/testbin.cpp
+EXEC_OBJ := $(BUILD_DIR)/$(EXECUTABLE).o
+
+
+
+all: testfixture
+
+$(LIB_SO): $(LIB_OBJ) | $(LIB_DIR)
+	$(CC) -shared -o $@ $<
+	echo '{ corrupt json "system": "syftsys","name": "libhello_world.so","version": "0.01","pure:0.01"}' | objcopy --add-section .note.package=/dev/stdin --set-section-flags .note.package=noload,readonly $@
+
+$(LIB_OBJ): $(LIB_SRC) | $(BUILD_DIR)
+	$(CC) $(CFLAGS) -fPIC -c $< -o $@
+
+$(EXEC_OBJ): $(EXEC_SRC) | $(BUILD_DIR)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(BIN_DIR):
+	mkdir -p $(BIN_DIR)
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+$(LIB_DIR):
+	mkdir -p $(LIB_DIR)
+
+$(BIN_DIR)/$(EXECUTABLE): $(EXEC_OBJ) $(LIB_SO) | $(BIN_DIR)
+	$(CC) $(CFLAGS) -o $@ $^ -L$(LIB_DIR) -l$(LIB_NAME) $(LDFLAGS)
+	echo '{corrupt json ..._syfttestfixture:0.01"}' | objcopy --add-section .note.package=/dev/stdin --set-section-flags .note.package=noload,readonly $@
+
+testfixture: $(BIN_DIR)/$(EXECUTABLE)
+
+clean:
+	rm -rf $(BUILD_DIR) $(LIB_DIR) $(BIN_DIR) $(EXECUTABLE)
+
+.PHONY: all clean 
+

syft/pkg/cataloger/binary/test-fixtures/elf-test-fixtures/elfbinwithcorrupt/elfsrc/testbin.cpp

@@ -0,0 +1,8 @@
+#include "hello_world.h"
+
+int main() {
+    // Call the function from the shared library
+    print_hello_world();
+
+    return 0;
+}

syft/pkg/cataloger/binary/test-fixtures/elf-test-fixtures/elfbinwithcorrupt/makefile

@@ -0,0 +1,18 @@
+CC = g++
+CFLAGS = -std=c++17 -Wall -Wextra -pedantic
+BUILD_DIR := ./build
+BIN_DIR := ./bin
+LIB_DIR := $(BIN_DIR)/lib
+
+
+
+all: testfixtures
+
+testfixtures: 
+	$(MAKE) -C elfsrc
+	
+clean:
+	rm -rf $(BUILD_DIR) $(BIN_DIR)
+
+.PHONY: all clean testfixtures
+