yara-x 1.15.0

A pure Rust implementation of YARA.
Documentation 
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use std::rc::Rc;

use crate::modules::prelude::*;
use crate::modules::protos::test_proto2::NestedProto2;
use crate::modules::protos::test_proto2::TestProto2;
use crate::types::Struct;

#[cfg(test)]
mod tests;

/// Adds two integers.
#[module_export(name = "add")]
pub(crate) fn add_i64(_ctx: &mut ScanContext, a: i64, b: i64) -> i64 {
    a + b
}

/// Adds two floats.
#[module_export(name = "add")]
pub(crate) fn add_f64(_ctx: &mut ScanContext, a: f64, b: f64) -> f64 {
    a + b
}

/// Converts a string to uppercase.
#[module_export(name = "uppercase")]
pub(crate) fn uppercase(
    ctx: &mut ScanContext,
    s: RuntimeString,
) -> Uppercase<RuntimeString> {
    Uppercase::new(s.as_bstr(ctx).to_uppercase())
}

/// A nested function.
#[module_export(name = "nested.nested_func")]
pub(crate) fn nested_func(_ctx: &mut ScanContext) -> bool {
    true
}

/// A nested method.
#[module_export(
    name = "nested_method",
    method_of = "test_proto2.NestedProto2"
)]
pub(crate) fn nested_method(
    _ctx: &mut ScanContext,
    structure: Rc<Struct>,
) -> bool {
    structure.field_by_name("nested_bool").unwrap().type_value.as_bool()
}

/// A nested method with an argument.
#[module_export(
    name = "nested_method_with_arg",
    method_of = "test_proto2.NestedProto2"
)]
pub(crate) fn nested_method_with_arg(
    ctx: &mut ScanContext,
    structure: Rc<Struct>,
    arg: RuntimeString,
) -> bool {
    let arg = arg.as_bstr(ctx);
    let field = structure
        .field_by_name("nested_string")
        .unwrap()
        .type_value
        .as_string();

    arg.eq(field.as_bstr())
}

/// Returns an undefined integer.
#[module_export]
pub(crate) fn undef_i64(_ctx: &mut ScanContext) -> Option<i64> {
    None
}

/// Extracts the first n bytes of the scanned data.
#[module_export]
fn head(ctx: &mut ScanContext, n: i64) -> Option<RuntimeString> {
    let head = ctx.scanned_data()?.get(0..n as usize)?;
    Some(RuntimeString::from_slice(ctx, head))
}

/// Gets foo from the protobuf.
#[module_export]
fn get_foo(ctx: &mut ScanContext) -> Option<RuntimeString> {
    let proto = ctx.module_output::<TestProto2>()?;
    let string_foo = proto.string_foo.as_ref().cloned()?;
    Some(RuntimeString::new(string_foo))
}

/// Converts a string to an integer.
#[module_export]
fn to_int(ctx: &ScanContext, string: RuntimeString) -> Option<i64> {
    let string = string.to_str(ctx).ok()?;
    string.parse::<i64>().ok()
}

#[module_main]
fn main(data: &[u8], meta: Option<&[u8]>) -> Result<TestProto2, ModuleError> {
    let mut test = TestProto2::new();

    test.set_int32_zero(0);
    test.set_int64_zero(0);
    test.set_sint32_zero(0);
    test.set_sint64_zero(0);
    test.set_uint32_zero(0);
    test.set_uint64_zero(0);
    test.set_fixed32_zero(0);
    test.set_fixed64_zero(0);
    test.set_sfixed32_zero(0);
    test.set_sfixed64_zero(0);
    test.set_float_zero(0.0);
    test.set_double_zero(0.0);

    test.set_int32_one(1);
    test.set_int64_one(1);
    test.set_sint32_one(1);
    test.set_sint64_one(1);
    test.set_uint32_one(1);
    test.set_uint64_one(1);
    test.set_fixed32_one(1);
    test.set_fixed64_one(1);
    test.set_sfixed32_one(1);
    test.set_sfixed64_one(1);
    test.set_float_one(1.0);
    test.set_double_one(1.0);

    test.set_string_foo("foo".into());
    test.set_string_bar("bar".into());

    test.set_bytes_foo("foo".into());
    test.set_bytes_bar("bar".into());
    test.set_bytes_raw(
        b"\xfc\x48\x83\xe4\xf0\xeb\x33\x5d\x8b\x45\x00\x48".into(),
    );

    test.set_bool_proto(true);
    test.set_file_size(data.len() as u64);

    test.array_int64.push(1);
    test.array_int64.push(10);
    test.array_int64.push(100);

    test.array_float.push(1.0);
    test.array_float.push(10.0);
    test.array_float.push(100.0);

    test.array_bool.push(false);
    test.array_bool.push(true);

    test.array_string.push("foo".into());
    test.array_string.push("bar".into());
    test.array_string.push("baz".into());

    let mut nested = NestedProto2::new();

    nested.set_nested_int32_zero(0);
    nested.set_nested_int64_zero(0);
    nested.set_nested_int32_one(1);
    nested.set_nested_int64_one(1);
    nested.set_nested_bool(false);
    nested.set_nested_string("foo".into());

    nested.nested_array_int64.push(1);
    nested.nested_array_int64.push(10);
    nested.nested_array_int64.push(100);

    test.nested = Some(nested.clone()).into();

    test.map_string_struct.insert("foo".into(), nested.clone());
    test.map_string_int64.insert("one".into(), 1);
    test.map_string_float.insert("one".into(), 1.0);
    test.map_string_string.insert("foo".into(), "FOO".into());
    test.map_string_bool.insert("foo".into(), true);

    test.map_int64_struct.insert(100, nested.clone());
    test.map_int64_int64.insert(100, 1000);
    test.map_int64_float.insert(100, 1000.0);
    test.map_int64_string.insert(100, "one thousand".into());
    test.map_int64_bool.insert(100, true);

    test.array_struct.push(nested.clone());

    let mut nested = nested.clone();
    nested.set_nested_bool(true);

    test.array_struct.push(nested);

    test.set_timestamp(1748591440);

    test.metadata = meta.map(Vec::from);

    Ok(test)
}