|
| 1 | +#![no_main] |
| 2 | +use libfuzzer_sys::fuzz_target; |
| 3 | +extern crate owasm_vm; |
| 4 | +use crate::owasm_vm::cache::*; |
| 5 | +use crate::owasm_vm::error::Error; |
| 6 | +use owasm_vm::vm::Querier; |
| 7 | +use std::io::{Read, Write}; |
| 8 | +use std::process::Command; |
| 9 | +use tempfile::NamedTempFile; |
| 10 | + |
| 11 | +pub struct MockQuerier {} |
| 12 | + |
| 13 | +impl Querier for MockQuerier { |
| 14 | + fn get_span_size(&self) -> i64 { |
| 15 | + 300 |
| 16 | + } |
| 17 | + fn get_calldata(&self) -> Result<Vec<u8>, Error> { |
| 18 | + Ok(vec![1]) |
| 19 | + } |
| 20 | + fn set_return_data(&self, _: &[u8]) -> Result<(), Error> { |
| 21 | + Ok(()) |
| 22 | + } |
| 23 | + fn get_ask_count(&self) -> i64 { |
| 24 | + 10 |
| 25 | + } |
| 26 | + fn get_min_count(&self) -> i64 { |
| 27 | + 8 |
| 28 | + } |
| 29 | + fn get_prepare_time(&self) -> i64 { |
| 30 | + 100_000 |
| 31 | + } |
| 32 | + fn get_execute_time(&self) -> Result<i64, Error> { |
| 33 | + Ok(100_000) |
| 34 | + } |
| 35 | + fn get_ans_count(&self) -> Result<i64, Error> { |
| 36 | + Ok(8) |
| 37 | + } |
| 38 | + fn ask_external_data(&self, _: i64, _: i64, _: &[u8]) -> Result<(), Error> { |
| 39 | + Ok(()) |
| 40 | + } |
| 41 | + fn get_external_data_status(&self, _: i64, _: i64) -> Result<i64, Error> { |
| 42 | + Ok(1) |
| 43 | + } |
| 44 | + fn get_external_data(&self, _: i64, _: i64) -> Result<Vec<u8>, Error> { |
| 45 | + Ok(vec![1]) |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +fn wat2wasm(wat: impl AsRef<[u8]>) -> Vec<u8> { |
| 50 | + let mut input_file = NamedTempFile::new().unwrap(); |
| 51 | + let mut output_file = NamedTempFile::new().unwrap(); |
| 52 | + input_file.write_all(wat.as_ref()).unwrap(); |
| 53 | + Command::new("wat2wasm") |
| 54 | + .args(&[ |
| 55 | + input_file.path().to_str().unwrap(), |
| 56 | + "-o", |
| 57 | + output_file.path().to_str().unwrap(), |
| 58 | + "--no-check", |
| 59 | + ]) |
| 60 | + .output() |
| 61 | + .unwrap(); |
| 62 | + let mut wasm = Vec::new(); |
| 63 | + output_file.read_to_end(&mut wasm).unwrap(); |
| 64 | + wasm |
| 65 | +} |
| 66 | + |
| 67 | +fn generate_wat(imported_function: String) -> String { |
| 68 | + let s = format!( |
| 69 | + r#"(module |
| 70 | + {} |
| 71 | + (func (;"execute": Resolves with result "beeb";)) |
| 72 | + (memory (export "memory") 512) |
| 73 | + (data (i32.const 1048576) "beeb") |
| 74 | + (export "prepare" (func 1)) |
| 75 | + (export "execute" (func 2))) |
| 76 | + "#, |
| 77 | + imported_function |
| 78 | + ); |
| 79 | + return s; |
| 80 | +} |
| 81 | + |
| 82 | +fuzz_target!(|data: [u64; 30]| { |
| 83 | + let mut imported_wat = vec![]; |
| 84 | + imported_wat.push(( |
| 85 | + "get_span_size", |
| 86 | + format!( |
| 87 | + r#"(type (func (param) (result i64))) |
| 88 | + (import "env" "get_span_size" (func (type 0))) |
| 89 | + (func |
| 90 | + call 0 |
| 91 | + drop |
| 92 | + )"# |
| 93 | + ), |
| 94 | + )); |
| 95 | + imported_wat.push(( |
| 96 | + "read_calldata", |
| 97 | + format!( |
| 98 | + r#"(type (func (param i64) (result i64))) |
| 99 | + (import "env" "read_calldata" (func (type 0))) |
| 100 | + (func |
| 101 | + (i64.mul (i64.const {}) (i64.const {})) |
| 102 | + call 0 |
| 103 | + drop |
| 104 | + )"#, |
| 105 | + data[28], data[29], |
| 106 | + ), |
| 107 | + )); |
| 108 | + imported_wat.push(( |
| 109 | + "set_return_data", |
| 110 | + format!( |
| 111 | + r#"(type (func (param i64 i64) (result))) |
| 112 | + (import "env" "set_return_data" (func (type 0))) |
| 113 | + (func |
| 114 | + (i64.mul (i64.const {}) (i64.const {})) |
| 115 | + (i64.div_s (i64.const {}) (i64.const 0)) |
| 116 | + call 0 |
| 117 | + )"#, |
| 118 | + data[26], data[27], data[28], |
| 119 | + ), |
| 120 | + )); |
| 121 | + imported_wat.push(( |
| 122 | + "get_ask_count", |
| 123 | + format!( |
| 124 | + r#"(type (func (param) (result i64))) |
| 125 | + (import "env" "get_ask_count" (func (type 0))) |
| 126 | + (func |
| 127 | + call 0 |
| 128 | + drop |
| 129 | + )"#, |
| 130 | + ), |
| 131 | + )); |
| 132 | + imported_wat.push(( |
| 133 | + "get_min_count", |
| 134 | + format!( |
| 135 | + r#"(type (func (param) (result i64))) |
| 136 | + (import "env" "get_min_count" (func (type 0))) |
| 137 | + (func |
| 138 | + call 0 |
| 139 | + drop |
| 140 | + )"#, |
| 141 | + ), |
| 142 | + )); |
| 143 | + imported_wat.push(( |
| 144 | + "get_prepare_time", |
| 145 | + format!( |
| 146 | + r#"(type (func (param) (result i64))) |
| 147 | + (import "env" "get_prepare_time" (func (type 0))) |
| 148 | + (func |
| 149 | + call 0 |
| 150 | + drop |
| 151 | + )"#, |
| 152 | + ), |
| 153 | + )); |
| 154 | + imported_wat.push(( |
| 155 | + "get_execute_time", |
| 156 | + format!( |
| 157 | + r#"(type (func (param) (result i64))) |
| 158 | + (import "env" "get_execute_time" (func (type 0))) |
| 159 | + (func |
| 160 | + call 0 |
| 161 | + drop |
| 162 | + )"#, |
| 163 | + ), |
| 164 | + )); |
| 165 | + imported_wat.push(( |
| 166 | + "get_ans_count", |
| 167 | + format!( |
| 168 | + r#"(type (func (param) (result i64))) |
| 169 | + (import "env" "get_ans_count" (func (type 0))) |
| 170 | + (func |
| 171 | + call 0 |
| 172 | + drop |
| 173 | + )"#, |
| 174 | + ), |
| 175 | + )); |
| 176 | + imported_wat.push(( |
| 177 | + "get_external_data_status", |
| 178 | + format!( |
| 179 | + r#"(type (func (param i64 i64) (result i64))) |
| 180 | + (import "env" "get_external_data_status" (func (type 0))) |
| 181 | + (func |
| 182 | + (i64.div_s (i64.const {}) (i64.const {})) |
| 183 | + (i64.mul (i64.const {}) (i64.const {})) |
| 184 | + call 0 |
| 185 | + drop |
| 186 | + )"#, |
| 187 | + data[26], data[27], data[28], data[29] |
| 188 | + ), |
| 189 | + )); |
| 190 | + imported_wat.push(( |
| 191 | + "ask_external_data", |
| 192 | + format!( |
| 193 | + r#"(type (func (param i64 i64 i64 i64) (result))) |
| 194 | + (import "env" "ask_external_data" (func (type 0))) |
| 195 | + (func |
| 196 | + (i64.mul (i64.const {}) (i64.const {})) |
| 197 | + (i64.div_s (i64.const 0) (i64.const {})) |
| 198 | + (i64.div_s (i64.const {}) (i64.const 0)) |
| 199 | + (i64.div_s (i64.const 0) (i64.const 0)) |
| 200 | + call 0 |
| 201 | + )"#, |
| 202 | + data[26], data[27], data[28], data[29] |
| 203 | + ), |
| 204 | + )); |
| 205 | + imported_wat.push(( |
| 206 | + "read_external_data", |
| 207 | + format!( |
| 208 | + r#"(type (func (param i64 i64 i64) (result i64))) |
| 209 | + (import "env" "read_external_data" (func (type 0))) |
| 210 | + (func |
| 211 | + (i64.div_s (i64.const {}) (i64.const {})) |
| 212 | + (i64.mul (i64.const {}) (i64.const {})) |
| 213 | + (i64.sub (i64.const {}) (i64.const {})) |
| 214 | + call 0 |
| 215 | + drop |
| 216 | + )"#, |
| 217 | + data[24], data[25], data[26], data[27], data[28], data[29] |
| 218 | + ), |
| 219 | + )); |
| 220 | + imported_wat.push(( |
| 221 | + "ecvrf_verify", |
| 222 | + format!( |
| 223 | + r#"(type (func (param i64 i64 i64 i64 i64 i64) (result i32))) |
| 224 | + (import "env" "ecvrf_verify" (func (type 0))) |
| 225 | + (func |
| 226 | + (i64.mul (i64.const {}) (i64.const {})) |
| 227 | + (i64.add (i64.const {}) (i64.const {})) |
| 228 | + (i64.add (i64.const {}) (i64.const 0)) |
| 229 | + (i64.sub (i64.const {}) (i64.const {})) |
| 230 | + (i64.sub (i64.const {}) (i64.const 0)) |
| 231 | + (i64.sub (i64.const 0) (i64.const 0)) |
| 232 | + call 0 |
| 233 | + drop |
| 234 | + )"#, |
| 235 | + data[22], data[23], data[24], data[25], data[26], data[27], data[28], data[29] |
| 236 | + ), |
| 237 | + )); |
| 238 | + for (_func, wat) in &imported_wat { |
| 239 | + // println!("======================"); |
| 240 | + // println!("{:?}", func); |
| 241 | + let s = generate_wat(wat.clone()); |
| 242 | + // println!("{}", s); |
| 243 | + let wasm = wat2wasm(s); |
| 244 | + let code = owasm_vm::compile(&wasm).unwrap(); |
| 245 | + let mut cache = Cache::new(CacheOptions { cache_size: 10000 }); |
| 246 | + let _gas = owasm_vm::run(&mut cache, &code, u64::MAX, true, MockQuerier {}); |
| 247 | + // println!("{:?}", gas); |
| 248 | + } |
| 249 | +}); |
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