Add ecrecover syscall

programs/bpf/Cargo.toml

@@ -73,6 +73,7 @@ members = [
     "rust/ro_modify",
     "rust/ro_account_modify",
     "rust/sanity",
+    "rust/secp256k1_recover",
     "rust/sha",
     "rust/spoof1",
     "rust/spoof1_system",

programs/bpf/build.rs

@@ -86,6 +86,7 @@ fn main() {
             "ro_modify",
             "ro_account_modify",
             "sanity",
+            "secp256k1_recover",
             "sha",
             "spoof1",
             "spoof1_system",

programs/bpf/c/src/secp256k1_recover/secp256k1_recover.c

@@ -0,0 +1,38 @@
+/**
+ * @brief Secp256k1Recover Syscall test
+ */
+#include <solana_sdk.h>
+
+extern uint64_t entrypoint(const uint8_t *input) {
+
+  uint8_t result[SECP256K1_RECOVER_RESULT_LENGTH];
+  uint8_t expected[] = { 0x42, 0xcd, 0x27, 0xe4, 0x0f, 0xdf, 0x7c, 0x97,
+                         0x0a, 0xa2, 0xca, 0x0b, 0x88, 0x5b, 0x96, 0x0f,
+                         0x8b, 0x62, 0x8a, 0x41, 0xa1, 0x81, 0xe7, 0xe6,
+                         0x8e, 0x03, 0xea, 0x0b, 0x84, 0x20, 0x58, 0x9b,
+                         0x32, 0x06, 0xbd, 0x66, 0x2f, 0x75, 0x65, 0xd6,
+                         0x9d, 0xbd, 0x1d, 0x34, 0x29, 0x6a, 0xd9, 0x35,
+                         0x38, 0xed, 0x86, 0x9e, 0x99, 0x20, 0x43, 0xc3,
+                         0xeb, 0xad, 0x65, 0x50, 0xa0, 0x11, 0x6e, 0x5d};
+
+  uint8_t hash[] = { 0xde, 0xa5, 0x66, 0xb6, 0x94, 0x3b, 0xe0, 0xe9,
+                          0x62, 0x53, 0xc2, 0x21, 0x5b, 0x1b, 0xac, 0x69,
+                          0xe7, 0xa8, 0x1e, 0xdb, 0x41, 0xc5, 0x02, 0x8b,
+                          0x4f, 0x5c, 0x45, 0xc5, 0x3b, 0x49, 0x54, 0xd0};
+  uint8_t signature[] = { 0x97, 0xa4, 0xee, 0x31, 0xfe, 0x82, 0x65, 0x72,
+                          0x9f, 0x4a, 0xa6, 0x7d, 0x24, 0xd4, 0xa7, 0x27,
+                          0xf8, 0xc3, 0x15, 0xa4, 0xc8, 0xf9, 0x80, 0xeb,
+                          0x4c, 0x4d, 0x4a, 0xfa, 0x6e, 0xc9, 0x42, 0x41,
+                          0x5d, 0x10, 0xd9, 0xc2, 0x8a, 0x90, 0xe9, 0x92,
+                          0x9c, 0x52, 0x4b, 0x2c, 0xfb, 0x65, 0xdf, 0xbc,
+                          0xf6, 0x8c, 0xfd, 0x68, 0xdb, 0x17, 0xf9, 0x5d,
+                          0x23, 0x5f, 0x96, 0xd8, 0xf0, 0x72, 0x01, 0x2d};
+  uint64_t recovery_id = 1;
+
+  uint64_t result_code = sol_secp256k1_recover(hash, recovery_id, signature, result);
+
+  sol_assert(0 == result_code);
+  sol_assert(0 == sol_memcmp(result, expected, SHA256_RESULT_LENGTH));
+
+  return SUCCESS;
+}

programs/bpf/rust/secp256k1_recover/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "solana-bpf-rust-secp256k1-recover"
+version = "1.8.0"
+description = "Solana BPF test program written in Rust"
+authors = ["Solana Maintainers <maintainers@solana.foundation>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+documentation = "https://docs.rs/solana-bpf-rust-secp256k1-recover"
+edition = "2018"
+
+[dependencies]
+solana-program = { path = "../../../../sdk/program", version = "=1.8.0" }
+
+[lib]
+crate-type = ["cdylib"]
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]

programs/bpf/rust/secp256k1_recover/src/lib.rs

@@ -0,0 +1,44 @@
+//! @brief Secp256k1Recover Syscall test
+
+extern crate solana_program;
+use solana_program::{custom_panic_default, msg};
+
+fn test_secp256k1_recover() {
+    use solana_program::secp256k1_recover::secp256k1_recover;
+
+    let expected: [u8; 64] = [
+        0x42, 0xcd, 0x27, 0xe4, 0x0f, 0xdf, 0x7c, 0x97, 0x0a, 0xa2, 0xca, 0x0b, 0x88, 0x5b, 0x96,
+        0x0f, 0x8b, 0x62, 0x8a, 0x41, 0xa1, 0x81, 0xe7, 0xe6, 0x8e, 0x03, 0xea, 0x0b, 0x84, 0x20,
+        0x58, 0x9b, 0x32, 0x06, 0xbd, 0x66, 0x2f, 0x75, 0x65, 0xd6, 0x9d, 0xbd, 0x1d, 0x34, 0x29,
+        0x6a, 0xd9, 0x35, 0x38, 0xed, 0x86, 0x9e, 0x99, 0x20, 0x43, 0xc3, 0xeb, 0xad, 0x65, 0x50,
+        0xa0, 0x11, 0x6e, 0x5d,
+    ];
+
+    let hash: [u8; 32] = [
+        0xde, 0xa5, 0x66, 0xb6, 0x94, 0x3b, 0xe0, 0xe9, 0x62, 0x53, 0xc2, 0x21, 0x5b, 0x1b, 0xac,
+        0x69, 0xe7, 0xa8, 0x1e, 0xdb, 0x41, 0xc5, 0x02, 0x8b, 0x4f, 0x5c, 0x45, 0xc5, 0x3b, 0x49,
+        0x54, 0xd0,
+    ];
+    let recovery_id: u8 = 1;
+    let signature: [u8; 64] = [
+        0x97, 0xa4, 0xee, 0x31, 0xfe, 0x82, 0x65, 0x72, 0x9f, 0x4a, 0xa6, 0x7d, 0x24, 0xd4, 0xa7,
+        0x27, 0xf8, 0xc3, 0x15, 0xa4, 0xc8, 0xf9, 0x80, 0xeb, 0x4c, 0x4d, 0x4a, 0xfa, 0x6e, 0xc9,
+        0x42, 0x41, 0x5d, 0x10, 0xd9, 0xc2, 0x8a, 0x90, 0xe9, 0x92, 0x9c, 0x52, 0x4b, 0x2c, 0xfb,
+        0x65, 0xdf, 0xbc, 0xf6, 0x8c, 0xfd, 0x68, 0xdb, 0x17, 0xf9, 0x5d, 0x23, 0x5f, 0x96, 0xd8,
+        0xf0, 0x72, 0x01, 0x2d,
+    ];
+
+    let public_key = secp256k1_recover(&hash[..], recovery_id, &signature[..]).unwrap();
+    assert_eq!(public_key.to_bytes(), expected);
+}
+
+#[no_mangle]
+pub extern "C" fn entrypoint(_input: *mut u8) -> u64 {
+    msg!("secp256k1_recover");
+
+    test_secp256k1_recover();
+
+    0
+}
+
+custom_panic_default!();

programs/bpf/tests/programs.rs

@@ -439,6 +439,7 @@ fn test_program_bpf_sanity() {
             ("relative_call", true),
             ("sanity", true),
             ("sanity++", true),
+            ("secp256k1_recover", true),
             ("sha", true),
             ("struct_pass", true),
             ("struct_ret", true),
@@ -460,6 +461,7 @@ fn test_program_bpf_sanity() {
             ("solana_bpf_rust_param_passing", true),
             ("solana_bpf_rust_rand", true),
             ("solana_bpf_rust_sanity", true),
+            ("solana_bpf_rust_secp256k1_recover", true),
             ("solana_bpf_rust_sha", true),
         ]);
     }
@@ -1282,6 +1284,7 @@ fn assert_instruction_count() {
             ("relative_call", 10),
             ("sanity", 169),
             ("sanity++", 168),
+            ("secp256k1_recover", 357),
             ("sha", 1040),
             ("struct_pass", 8),
             ("struct_ret", 22),
@@ -1303,7 +1306,8 @@ fn assert_instruction_count() {
             ("solana_bpf_rust_param_passing", 46),
             ("solana_bpf_rust_rand", 481),
             ("solana_bpf_rust_sanity", 880),
-            ("solana_bpf_rust_sha", 32301),
+            ("solana_bpf_rust_secp256k1_recover", 307),
+            ("solana_bpf_rust_sha", 32333),
         ]);
     }
 

programs/bpf_loader/Cargo.toml

@@ -19,6 +19,7 @@ log = "0.4.11"
 num-derive = "0.3"
 num-traits = "0.2"
 rand_core = "0.6.2"
+libsecp256k1 = "0.5.0"
 sha3 = "0.9.1"
 solana-measure = { path = "../../measure", version = "=1.8.0" }
 solana-runtime = { path = "../../runtime", version = "=1.8.0" }

programs/bpf_loader/src/syscalls.rs

@@ -21,7 +21,8 @@ use solana_sdk::{
     feature_set::{
         blake3_syscall_enabled, cpi_data_cost, demote_sysvar_write_locks,
         enforce_aligned_host_addrs, keccak256_syscall_enabled, memory_ops_syscalls,
-        set_upgrade_authority_via_cpi_enabled, sysvar_via_syscall, update_data_on_realloc,
+        secp256k1_recover_syscall_enabled, set_upgrade_authority_via_cpi_enabled,
+        sysvar_via_syscall, update_data_on_realloc,
     },
     hash::{Hasher, HASH_BYTES},
     ic_msg,
@@ -32,6 +33,9 @@ use solana_sdk::{
     process_instruction::{self, stable_log, ComputeMeter, InvokeContext, Logger},
     pubkey::{Pubkey, PubkeyError, MAX_SEEDS},
     rent::Rent,
+    secp256k1_recover::{
+        Secp256k1RecoverError, SECP256K1_PUBLIC_KEY_LENGTH, SECP256K1_SIGNATURE_LENGTH,
+    },
     sysvar::{self, fees::Fees, Sysvar, SysvarId},
 };
 use std::{
@@ -134,6 +138,11 @@ pub fn register_syscalls(
         syscall_registry.register_syscall_by_name(b"sol_keccak256", SyscallKeccak256::call)?;
     }
 
+    if invoke_context.is_feature_active(&secp256k1_recover_syscall_enabled::id()) {
+        syscall_registry
+            .register_syscall_by_name(b"sol_secp256k1_recover", SyscallSecp256k1Recover::call)?;
+    }
+
     if invoke_context.is_feature_active(&blake3_syscall_enabled::id()) {
         syscall_registry.register_syscall_by_name(b"sol_blake3", SyscallBlake3::call)?;
     }
@@ -331,6 +340,16 @@ pub fn bind_syscall_context_objects<'a>(
         }),
     );
 
+    bind_feature_gated_syscall_context_object!(
+        vm,
+        invoke_context.is_feature_active(&secp256k1_recover_syscall_enabled::id()),
+        Box::new(SyscallSecp256k1Recover {
+            cost: bpf_compute_budget.secp256k1_recover_cost,
+            compute_meter: invoke_context.get_compute_meter(),
+            loader_id,
+        }),
+    );
+
     let is_sysvar_via_syscall_active = invoke_context.is_feature_active(&sysvar_via_syscall::id());
 
     let invoke_context = Rc::new(RefCell::new(invoke_context));
@@ -1343,6 +1362,92 @@ impl<'a> SyscallObject<BpfError> for SyscallMemset<'a> {
     }
 }
 
+/// secp256k1_recover
+pub struct SyscallSecp256k1Recover<'a> {
+    cost: u64,
+    compute_meter: Rc<RefCell<dyn ComputeMeter>>,
+    loader_id: &'a Pubkey,
+}
+
+impl<'a> SyscallObject<BpfError> for SyscallSecp256k1Recover<'a> {
+    fn call(
+        &mut self,
+        hash_addr: u64,
+        recovery_id_val: u64,
+        signature_addr: u64,
+        result_addr: u64,
+        _arg5: u64,
+        memory_mapping: &MemoryMapping,
+        result: &mut Result<u64, EbpfError<BpfError>>,
+    ) {
+        question_mark!(self.compute_meter.consume(self.cost), result);
+
+        let hash = question_mark!(
+            translate_slice::<u8>(
+                memory_mapping,
+                hash_addr,
+                keccak::HASH_BYTES as u64,
+                self.loader_id,
+                true,
+            ),
+            result
+        );
+        let signature = question_mark!(
+            translate_slice::<u8>(
+                memory_mapping,
+                signature_addr,
+                SECP256K1_SIGNATURE_LENGTH as u64,
+                self.loader_id,
+                true,
+            ),
+            result
+        );
+        let secp256k1_recover_result = question_mark!(
+            translate_slice_mut::<u8>(
+                memory_mapping,
+                result_addr,
+                SECP256K1_PUBLIC_KEY_LENGTH as u64,
+                self.loader_id,
+                true,
+            ),
+            result
+        );
+
+        let message = match libsecp256k1::Message::parse_slice(hash) {
+            Ok(msg) => msg,
+            Err(_) => {
+                *result = Ok(Secp256k1RecoverError::InvalidHash.into());
+                return;
+            }
+        };
+        let recovery_id = match libsecp256k1::RecoveryId::parse(recovery_id_val as u8) {
+            Ok(id) => id,
+            Err(_) => {
+                *result = Ok(Secp256k1RecoverError::InvalidRecoveryId.into());
+                return;
+            }
+        };
+        let signature = match libsecp256k1::Signature::parse_standard_slice(signature) {
+            Ok(sig) => sig,
+            Err(_) => {
+                *result = Ok(Secp256k1RecoverError::InvalidSignature.into());
+                return;
+            }
+        };
+
+        let public_key = match libsecp256k1::recover(&message, &signature, &recovery_id) {
+            Ok(key) => key.serialize(),
+            Err(_) => {
+                *result = Ok(Secp256k1RecoverError::InvalidSignature.into());
+                return;
+            }
+        };
+
+        secp256k1_recover_result.copy_from_slice(&public_key[1..65]);
+        *result = Ok(SUCCESS);
+    }
+}
+
 // Blake3
 pub struct SyscallBlake3<'a> {
     base_cost: u64,

sdk/bpf/c/inc/solana_sdk.h

@@ -457,6 +457,37 @@ uint64_t sol_keccak256(
     uint8_t *result
 );
 
+
+/** Length of a secp256k1 recover input hash */
+#define SECP256K1_RECOVER_HASH_LENGTH 32
+/** Length of a secp256k1 input signature */
+#define SECP256K1_RECOVER_SIGNATURE_LENGTH 64
+/** Length of a secp256k1 recover result */
+#define SECP256K1_RECOVER_RESULT_LENGTH 64
+
+/** The hash provided to a sol_secp256k1_recover is invalid */
+#define SECP256K1_RECOVER_ERROR_INVALID_HASH 1
+/** The recovery_id provided to a sol_secp256k1_recover is invalid */
+#define SECP256K1_RECOVER_ERROR_INVALID_RECOVERY_ID 2
+/** The signature provided to a sol_secp256k1_recover is invalid */
+#define SECP256K1_RECOVER_ERROR_INVALID_SIGNATURE 3
+
+/**
+ * Recover public key from a signed message.
+ *
+ * @param hash Hashed message
+ * @param recovery_id Tag used for public key recovery from signatures. Can be 0 or 1
+ * @param signature An ECDSA signature
+ * @param result 64 byte array to hold the result. A recovered public key
+ * @return 0 if executed successfully
+ */
+uint64_t sol_secp256k1_recover(
+    const uint8_t *hash,
+    uint64_t recovery_id,
+    const uint8_t *signature,
+    uint8_t *result
+);
+
 /**
  * Length of a Blake3 hash result
  */

sdk/program/Cargo.toml

@@ -35,6 +35,7 @@ thiserror = "1.0"
 
 [target.'cfg(not(target_arch = "bpf"))'.dependencies]
 curve25519-dalek = "2.1.0"
+libsecp256k1 = "0.5.0"
 rand = "0.7.0"
 solana-logger = { path = "../../logger", version = "=1.8.0" }