extract big-mod-exp crate (#4491)

* extract big-mod-exp crate

* remove unused deps

* remove unnecessary doc target

* revert changes to lock file version

* missing workspace members entry

* trigger ci

Cargo.toml

@@ -111,6 +111,7 @@ members = [
     "sdk/account-info",
     "sdk/address-lookup-table-interface",
     "sdk/atomic-u64",
+    "sdk/big-mod-exp",
     "sdk/bincode",
     "sdk/borsh",
     "sdk/cargo-build-sbf",
@@ -451,6 +452,7 @@ solana-banks-client = { path = "banks-client", version = "=2.2.0" }
 solana-banks-interface = { path = "banks-interface", version = "=2.2.0" }
 solana-banks-server = { path = "banks-server", version = "=2.2.0" }
 solana-bench-tps = { path = "bench-tps", version = "=2.2.0" }
+solana-big-mod-exp = { path = "sdk/big-mod-exp", version = "=2.2.0" }
 solana-bincode = { path = "sdk/bincode", version = "=2.2.0" }
 solana-bloom = { path = "bloom", version = "=2.2.0" }
 solana-bn254 = { path = "curves/bn254", version = "=2.2.0" }

sdk/big-mod-exp/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "solana-big-mod-exp"
+description = "Solana big integer modular exponentiation"
+documentation = "https://docs.rs/solana-big-mod-exp"
+version = { workspace = true }
+authors = { workspace = true }
+repository = { workspace = true }
+homepage = { workspace = true }
+license = { workspace = true }
+edition = { workspace = true }
+
+[target.'cfg(target_os = "solana")'.dependencies]
+solana-define-syscall = { workspace = true }
+
+[target.'cfg(not(target_os = "solana"))'.dependencies]
+num-bigint = { workspace = true }
+num-traits = { workspace = true }
+
+[dev-dependencies]
+array-bytes = { workspace = true }
+serde = { workspace = true }
+serde_derive = { workspace = true }
+serde_json = { workspace = true }
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[lints]
+workspace = true

sdk/program/src/big_mod_exp.rs → sdk/big-mod-exp/src/lib.rs

@@ -46,7 +46,7 @@ pub fn big_mod_exp(base: &[u8], exponent: &[u8], modulus: &[u8]) -> Vec<u8> {
             modulus_len: modulus.len() as u64,
         };
         unsafe {
-            crate::syscalls::sol_big_mod_exp(
+            solana_define_syscall::definitions::sol_big_mod_exp(
                 &param as *const _ as *const u8,
                 return_value.as_mut_slice() as *mut _ as *mut u8,
             )

sdk/program/Cargo.toml

@@ -29,6 +29,7 @@ serde_derive = { workspace = true }
 solana-account-info = { workspace = true, features = ["bincode"] }
 solana-address-lookup-table-interface = { workspace = true, features = ["bincode", "bytemuck"] }
 solana-atomic-u64 = { workspace = true }
+solana-big-mod-exp = { workspace = true }
 solana-bincode = { workspace = true }
 solana-borsh = { workspace = true, optional = true }
 solana-clock = { workspace = true, features = ["serde", "sysvar"] }

sdk/program/src/lib.rs

@@ -471,7 +471,6 @@
 extern crate self as solana_program;
 
 pub mod address_lookup_table;
-pub mod big_mod_exp;
 pub mod blake3;
 pub mod bpf_loader;
 pub mod bpf_loader_deprecated;
@@ -506,6 +505,8 @@ pub mod sysvar;
 pub mod vote;
 pub mod wasm;
 
+#[deprecated(since = "2.2.0", note = "Use `solana-big-mod-exp` crate instead")]
+pub use solana_big_mod_exp as big_mod_exp;
 #[cfg(feature = "borsh")]
 #[deprecated(since = "2.1.0", note = "Use `solana-borsh` crate instead")]
 pub use solana_borsh::deprecated as borsh;