[PM-22263] Integate Rust SDK to Seeder (#6150)

Adds a Rust SDK for performing seed related cryptograhic operations. It depends on internal portions of our Rust SDK. Primarily parts of the bitwarden-crypto crate.

util/RustSdk/rust/src/lib.rs

@@ -0,0 +1,152 @@
+#![allow(clippy::missing_safety_doc)]
+use std::{
+    ffi::{c_char, CStr, CString},
+    num::NonZeroU32,
+};
+
+use base64::{engine::general_purpose::STANDARD, Engine};
+
+use bitwarden_crypto::{
+    AsymmetricCryptoKey, AsymmetricPublicCryptoKey, BitwardenLegacyKeyBytes, HashPurpose, Kdf,
+    KeyEncryptable, MasterKey, RsaKeyPair, SpkiPublicKeyBytes, SymmetricCryptoKey,
+    UnsignedSharedKey, UserKey,
+};
+
+#[no_mangle]
+pub unsafe extern "C" fn generate_user_keys(
+    email: *const c_char,
+    password: *const c_char,
+) -> *const c_char {
+    let email = CStr::from_ptr(email).to_str().unwrap();
+    let password = CStr::from_ptr(password).to_str().unwrap();
+
+    println!("Generating keys for {email}");
+    println!("Password: {password}");
+
+    let kdf = Kdf::PBKDF2 {
+        iterations: NonZeroU32::new(5_000).unwrap(),
+    };
+
+    let master_key = MasterKey::derive(password, email, &kdf).unwrap();
+
+    let master_password_hash =
+        master_key.derive_master_key_hash(password.as_bytes(), HashPurpose::ServerAuthorization);
+
+    println!("Master password hash: {}", master_password_hash);
+
+    let (user_key, encrypted_user_key) = master_key.make_user_key().unwrap();
+
+    let keypair = keypair(&user_key.0);
+
+    let json = serde_json::json!({
+        "masterPasswordHash": master_password_hash,
+        "key": user_key.0.to_base64(),
+        "encryptedUserKey": encrypted_user_key.to_string(),
+        "publicKey": keypair.public.to_string(),
+        "privateKey": keypair.private.to_string(),
+    })
+    .to_string();
+
+    let result = CString::new(json).unwrap();
+
+    result.into_raw()
+}
+
+fn keypair(key: &SymmetricCryptoKey) -> RsaKeyPair {
+    const RSA_PRIVATE_KEY: &str = "-----BEGIN PRIVATE KEY-----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+E6c9j417Fdz+rj8KWzBzwWXQB5pSPflWcdZO886Xu/mVGmy9RWgLuVFhXwCwsVEP
+jNX5ramRb0/vY0yzenUCninBsIxFSbIfrPtLUYCc4hpxr+sr2Mg/y6jpvQKBgBez
+MRRs3xkcuXepuI2R+BCXL1/b02IJTUf1F+1eLLGd7YV0H+J3fgNc7gGWK51hOrF9
+JBZHBGeOUPlaukmPwiPdtQZpu4QNE3l37VlIpKTF30E6mb+BqR+nht3rUjarnMXg
+AoEZ18y6/KIjpSMpqC92Nnk/EBM9EYe6Cf4eA9ApAoGAeqEUg46UTlJySkBKURGp
+Is3v1kkf5I0X8DnOhwb+HPxNaiEdmO7ckm8+tPVgppLcG0+tMdLjigFQiDUQk2y3
+WjyxP5ZvXu7U96jaJRI8PFMoE06WeVYcdIzrID2HvqH+w0UQJFrLJ/0Mn4stFAEz
+XKZBokBGnjFnTnKcs7nv/O8=
+-----END PRIVATE KEY-----";
+
+    let private_key = AsymmetricCryptoKey::from_pem(RSA_PRIVATE_KEY).unwrap();
+    let public_key = private_key.to_public_key().to_der().unwrap();
+
+    let p = private_key.to_der().unwrap();
+
+    RsaKeyPair {
+        private: p.encrypt_with_key(key).unwrap(),
+        public: public_key.into(),
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn generate_organization_keys() -> *const c_char {
+    let key = SymmetricCryptoKey::make_aes256_cbc_hmac_key();
+
+    let key = UserKey::new(key);
+    let keypair = key.make_key_pair().expect("Failed to generate key pair");
+
+    let json = serde_json::json!({
+        "key": key.0.to_base64(),
+        "publicKey": keypair.public.to_string(),
+        "privateKey": keypair.private.to_string(),
+    })
+    .to_string();
+
+    let result = CString::new(json).unwrap();
+
+    result.into_raw()
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn generate_user_organization_key(
+    user_public_key: *const c_char,
+    organization_key: *const c_char,
+) -> *const c_char {
+    let user_public_key = CStr::from_ptr(user_public_key).to_str().unwrap().to_owned();
+    let organization_key = CStr::from_ptr(organization_key)
+        .to_str()
+        .unwrap()
+        .to_owned();
+
+    let user_public_key = STANDARD.decode(user_public_key).unwrap();
+    let organization_key = STANDARD.decode(organization_key).unwrap();
+
+    let encapsulation_key =
+        AsymmetricPublicCryptoKey::from_der(&SpkiPublicKeyBytes::from(user_public_key)).unwrap();
+
+    let encrypted_key = UnsignedSharedKey::encapsulate_key_unsigned(
+        &SymmetricCryptoKey::try_from(&BitwardenLegacyKeyBytes::from(organization_key)).unwrap(),
+        &encapsulation_key,
+    )
+    .unwrap();
+
+    let result = CString::new(encrypted_key.to_string()).unwrap();
+
+    result.into_raw()
+}
+
+/// # Safety
+///
+/// The `str` pointer must be a valid pointer previously returned by `CString::into_raw`
+/// and must not have already been freed. After calling this function, the pointer must not be used again.
+#[no_mangle]
+pub unsafe extern "C" fn free_c_string(str: *mut c_char) {
+    unsafe {
+        drop(CString::from_raw(str));
+    }
+}