diff --git a/ext/crypto/00_crypto.js b/ext/crypto/00_crypto.js
index ddc88bdcb2..16c8628295 100644
--- a/ext/crypto/00_crypto.js
+++ b/ext/crypto/00_crypto.js
@@ -759,6 +759,7 @@
      * @param {KeyUsages[]} keyUsages
      * @returns {Promise<any>}
      */
+    // deno-lint-ignore require-await
     async importKey(format, keyData, algorithm, extractable, keyUsages) {
       webidl.assertBranded(this, SubtleCrypto);
       const prefix = "Failed to execute 'importKey' on 'SubtleCrypto'";
@@ -812,7 +813,7 @@
           );
         }
         case "ECDSA": {
-          return await importKeyECDSA(
+          return importKeyECDSA(
             format,
             normalizedAlgorithm,
             keyData,
@@ -823,7 +824,7 @@
         case "RSASSA-PKCS1-v1_5":
         case "RSA-PSS":
         case "RSA-OAEP": {
-          return await importKeyRSA(
+          return importKeyRSA(
             format,
             normalizedAlgorithm,
             keyData,
@@ -850,7 +851,7 @@
           );
         }
         case "AES-KW": {
-          return await importKeyAES(
+          return importKeyAES(
             format,
             normalizedAlgorithm,
             keyData,
@@ -2194,7 +2195,7 @@
     return key;
   }
 
-  async function importKeyECDSA(
+  function importKeyECDSA(
     format,
     normalizedAlgorithm,
     keyData,
@@ -2227,16 +2228,13 @@
         }
 
         // 3.
-        const { data } = await core.opAsync("op_crypto_import_key", {
+        const { rawData } = core.opSync("op_crypto_import_key", {
           algorithm: "ECDSA",
           namedCurve: normalizedAlgorithm.namedCurve,
-        }, keyData);
+        }, { raw: keyData });
 
         const handle = {};
-        WeakMapPrototypeSet(KEY_STORE, handle, {
-          type: "public",
-          data,
-        });
+        WeakMapPrototypeSet(KEY_STORE, handle, rawData);
 
         // 4-5.
         const algorithm = {
@@ -2275,7 +2273,7 @@
     },
   };
 
-  async function importKeyRSA(
+  function importKeyRSA(
     format,
     normalizedAlgorithm,
     keyData,
@@ -2299,23 +2297,18 @@
         }
 
         // 2-9.
-        const { modulusLength, publicExponent, data } = await core
-          .opAsync(
-            "op_crypto_import_key",
-            {
-              algorithm: normalizedAlgorithm.name,
-              format: "pkcs8",
-              // Needed to perform step 7 without normalization.
-              hash: normalizedAlgorithm.hash.name,
-            },
-            keyData,
-          );
+        const { modulusLength, publicExponent, rawData } = core.opSync(
+          "op_crypto_import_key",
+          {
+            algorithm: normalizedAlgorithm.name,
+            // Needed to perform step 7 without normalization.
+            hash: normalizedAlgorithm.hash.name,
+          },
+          { pkcs8: keyData },
+        );
 
         const handle = {};
-        WeakMapPrototypeSet(KEY_STORE, handle, {
-          type: "private",
-          data,
-        });
+        WeakMapPrototypeSet(KEY_STORE, handle, rawData);
 
         const algorithm = {
           name: normalizedAlgorithm.name,
@@ -2350,23 +2343,18 @@
         }
 
         // 2-9.
-        const { modulusLength, publicExponent, data } = await core
-          .opAsync(
-            "op_crypto_import_key",
-            {
-              algorithm: normalizedAlgorithm.name,
-              format: "spki",
-              // Needed to perform step 7 without normalization.
-              hash: normalizedAlgorithm.hash.name,
-            },
-            keyData,
-          );
+        const { modulusLength, publicExponent, rawData } = core.opSync(
+          "op_crypto_import_key",
+          {
+            algorithm: normalizedAlgorithm.name,
+            // Needed to perform step 7 without normalization.
+            hash: normalizedAlgorithm.hash.name,
+          },
+          { spki: keyData },
+        );
 
         const handle = {};
-        WeakMapPrototypeSet(KEY_STORE, handle, {
-          type: "public",
-          data,
-        });
+        WeakMapPrototypeSet(KEY_STORE, handle, rawData);
 
         const algorithm = {
           name: normalizedAlgorithm.name,
diff --git a/ext/crypto/import_key.rs b/ext/crypto/import_key.rs
new file mode 100644
index 0000000000..16a8d155f8
--- /dev/null
+++ b/ext/crypto/import_key.rs
@@ -0,0 +1,578 @@
+use deno_core::error::AnyError;
+use deno_core::OpState;
+use deno_core::ZeroCopyBuf;
+use serde::Deserialize;
+use serde::Serialize;
+use spki::der::Decodable;
+use spki::der::Encodable;
+
+use crate::shared::*;
+use crate::OaepPrivateKeyParameters;
+use crate::PssPrivateKeyParameters;
+
+#[derive(Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum KeyData {
+  Spki(ZeroCopyBuf),
+  Pkcs8(ZeroCopyBuf),
+  Raw(ZeroCopyBuf),
+  Jwk { k: String },
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "camelCase", tag = "algorithm")]
+pub enum ImportKeyOptions {
+  #[serde(rename = "RSASSA-PKCS1-v1_5")]
+  RsassaPkcs1v15 { hash: ShaHash },
+  #[serde(rename = "RSA-PSS")]
+  RsaPss { hash: ShaHash },
+  #[serde(rename = "RSA-OAEP")]
+  RsaOaep { hash: ShaHash },
+  #[serde(rename = "ECDSA", rename_all = "camelCase")]
+  Ecdsa { named_curve: EcNamedCurve },
+  #[serde(rename = "ECDH", rename_all = "camelCase")]
+  Ecdh { named_curve: EcNamedCurve },
+}
+
+#[derive(Serialize)]
+#[serde(untagged)]
+pub enum ImportKeyResult {
+  #[serde(rename_all = "camelCase")]
+  Rsa {
+    raw_data: RawKeyData,
+    modulus_length: usize,
+    public_exponent: ZeroCopyBuf,
+  },
+  #[serde(rename_all = "camelCase")]
+  Ec { raw_data: RawKeyData },
+}
+
+pub fn op_crypto_import_key(
+  _state: &mut OpState,
+  opts: ImportKeyOptions,
+  key_data: KeyData,
+) -> Result<ImportKeyResult, AnyError> {
+  match opts {
+    ImportKeyOptions::RsassaPkcs1v15 { hash } => {
+      import_key_rsassa(key_data, hash)
+    }
+    ImportKeyOptions::RsaPss { hash } => import_key_rsapss(key_data, hash),
+    ImportKeyOptions::RsaOaep { hash } => import_key_rsaoaep(key_data, hash),
+    ImportKeyOptions::Ecdsa { named_curve }
+    | ImportKeyOptions::Ecdh { named_curve } => {
+      import_key_ec(key_data, named_curve)
+    }
+  }
+}
+
+fn import_key_rsassa(
+  key_data: KeyData,
+  hash: ShaHash,
+) -> Result<ImportKeyResult, deno_core::anyhow::Error> {
+  match key_data {
+    KeyData::Spki(data) => {
+      // 2-3.
+      let pk_info = spki::SubjectPublicKeyInfo::from_der(&data)
+        .map_err(|e| data_error(e.to_string()))?;
+
+      // 4-5.
+      let alg = pk_info.algorithm.oid;
+
+      // 6.
+      let pk_hash = match alg {
+        // rsaEncryption
+        RSA_ENCRYPTION_OID => None,
+        // sha1WithRSAEncryption
+        SHA1_RSA_ENCRYPTION_OID => Some(ShaHash::Sha1),
+        // sha256WithRSAEncryption
+        SHA256_RSA_ENCRYPTION_OID => Some(ShaHash::Sha256),
+        // sha384WithRSAEncryption
+        SHA384_RSA_ENCRYPTION_OID => Some(ShaHash::Sha384),
+        // sha512WithRSAEncryption
+        SHA512_RSA_ENCRYPTION_OID => Some(ShaHash::Sha512),
+        _ => return Err(data_error("unsupported algorithm")),
+      };
+
+      // 7.
+      if let Some(pk_hash) = pk_hash {
+        if pk_hash != hash {
+          return Err(data_error("hash mismatch"));
+        }
+      }
+
+      // 8-9.
+      let public_key =
+        rsa::pkcs1::RsaPublicKey::from_der(pk_info.subject_public_key)
+          .map_err(|e| data_error(e.to_string()))?;
+
+      let bytes_consumed = public_key
+        .encoded_len()
+        .map_err(|e| data_error(e.to_string()))?;
+
+      if bytes_consumed
+        != spki::der::Length::new(pk_info.subject_public_key.len() as u16)
+      {
+        return Err(data_error("public key is invalid (too long)"));
+      }
+
+      let data = pk_info.subject_public_key.to_vec().into();
+      let public_exponent =
+        public_key.public_exponent.as_bytes().to_vec().into();
+      let modulus_length = public_key.modulus.as_bytes().len() * 8;
+
+      Ok(ImportKeyResult::Rsa {
+        raw_data: RawKeyData::Public(data),
+        modulus_length,
+        public_exponent,
+      })
+    }
+    KeyData::Pkcs8(data) => {
+      // 2-3.
+      let pk_info = rsa::pkcs8::PrivateKeyInfo::from_der(&data)
+        .map_err(|e| data_error(e.to_string()))?;
+
+      // 4-5.
+      let alg = pk_info.algorithm.oid;
+
+      // 6.
+      let pk_hash = match alg {
+        // rsaEncryption
+        RSA_ENCRYPTION_OID => None,
+        // sha1WithRSAEncryption
+        SHA1_RSA_ENCRYPTION_OID => Some(ShaHash::Sha1),
+        // sha256WithRSAEncryption
+        SHA256_RSA_ENCRYPTION_OID => Some(ShaHash::Sha256),
+        // sha384WithRSAEncryption
+        SHA384_RSA_ENCRYPTION_OID => Some(ShaHash::Sha384),
+        // sha512WithRSAEncryption
+        SHA512_RSA_ENCRYPTION_OID => Some(ShaHash::Sha512),
+        _ => return Err(data_error("unsupported algorithm")),
+      };
+
+      // 7.
+      if let Some(pk_hash) = pk_hash {
+        if pk_hash != hash {
+          return Err(data_error("hash mismatch"));
+        }
+      }
+
+      // 8-9.
+      let private_key =
+        rsa::pkcs1::RsaPrivateKey::from_der(pk_info.private_key)
+          .map_err(|e| data_error(e.to_string()))?;
+
+      let bytes_consumed = private_key
+        .encoded_len()
+        .map_err(|e| data_error(e.to_string()))?;
+
+      if bytes_consumed
+        != spki::der::Length::new(pk_info.private_key.len() as u16)
+      {
+        return Err(data_error("private key is invalid (too long)"));
+      }
+
+      let data = pk_info.private_key.to_vec().into();
+      let public_exponent =
+        private_key.public_exponent.as_bytes().to_vec().into();
+      let modulus_length = private_key.modulus.as_bytes().len() * 8;
+
+      Ok(ImportKeyResult::Rsa {
+        raw_data: RawKeyData::Private(data),
+        modulus_length,
+        public_exponent,
+      })
+    }
+    // TODO(lucacasonato): support JWK encoding
+    _ => Err(unsupported_format()),
+  }
+}
+
+fn import_key_rsapss(
+  key_data: KeyData,
+  hash: ShaHash,
+) -> Result<ImportKeyResult, deno_core::anyhow::Error> {
+  match key_data {
+    KeyData::Spki(data) => {
+      // 2-3.
+      let pk_info = spki::SubjectPublicKeyInfo::from_der(&data)
+        .map_err(|e| data_error(e.to_string()))?;
+
+      // 4-5.
+      let alg = pk_info.algorithm.oid;
+
+      // 6.
+      let pk_hash = match alg {
+        // rsaEncryption
+        RSA_ENCRYPTION_OID => None,
+        // id-RSASSA-PSS
+        RSASSA_PSS_OID => {
+          let params = PssPrivateKeyParameters::try_from(
+            pk_info
+              .algorithm
+              .parameters
+              .ok_or_else(|| data_error("malformed parameters"))?,
+          )
+          .map_err(|_| data_error("malformed parameters"))?;
+
+          let hash_alg = params.hash_algorithm;
+          let hash = match hash_alg.oid {
+            // id-sha1
+            ID_SHA1_OID => Some(ShaHash::Sha1),
+            // id-sha256
+            ID_SHA256_OID => Some(ShaHash::Sha256),
+            // id-sha384
+            ID_SHA384_OID => Some(ShaHash::Sha384),
+            // id-sha256
+            ID_SHA512_OID => Some(ShaHash::Sha512),
+            _ => return Err(data_error("unsupported hash algorithm")),
+          };
+
+          if params.mask_gen_algorithm.oid != ID_MFG1 {
+            return Err(not_supported_error("unsupported hash algorithm"));
+          }
+
+          // TODO(lucacasonato):
+          // If the parameters field of the maskGenAlgorithm field of params
+          // is not an instance of the HashAlgorithm ASN.1 type that is
+          // identical in content to the hashAlgorithm field of params,
+          // throw a NotSupportedError.
+
+          hash
+        }
+        _ => return Err(data_error("unsupported algorithm")),
+      };
+
+      // 7.
+      if let Some(pk_hash) = pk_hash {
+        if pk_hash != hash {
+          return Err(data_error("hash mismatch"));
+        }
+      }
+
+      // 8-9.
+      let public_key =
+        rsa::pkcs1::RsaPublicKey::from_der(pk_info.subject_public_key)
+          .map_err(|e| data_error(e.to_string()))?;
+
+      let bytes_consumed = public_key
+        .encoded_len()
+        .map_err(|e| data_error(e.to_string()))?;
+
+      if bytes_consumed
+        != spki::der::Length::new(pk_info.subject_public_key.len() as u16)
+      {
+        return Err(data_error("public key is invalid (too long)"));
+      }
+
+      let data = pk_info.subject_public_key.to_vec().into();
+      let public_exponent =
+        public_key.public_exponent.as_bytes().to_vec().into();
+      let modulus_length = public_key.modulus.as_bytes().len() * 8;
+
+      Ok(ImportKeyResult::Rsa {
+        raw_data: RawKeyData::Public(data),
+        modulus_length,
+        public_exponent,
+      })
+    }
+    KeyData::Pkcs8(data) => {
+      // 2-3.
+      let pk_info = rsa::pkcs8::PrivateKeyInfo::from_der(&data)
+        .map_err(|e| data_error(e.to_string()))?;
+
+      // 4-5.
+      let alg = pk_info.algorithm.oid;
+
+      // 6.
+      // 6.
+      let pk_hash = match alg {
+        // rsaEncryption
+        RSA_ENCRYPTION_OID => None,
+        // id-RSASSA-PSS
+        RSASSA_PSS_OID => {
+          let params = PssPrivateKeyParameters::try_from(
+            pk_info
+              .algorithm
+              .parameters
+              .ok_or_else(|| not_supported_error("malformed parameters"))?,
+          )
+          .map_err(|_| not_supported_error("malformed parameters"))?;
+
+          let hash_alg = params.hash_algorithm;
+          let hash = match hash_alg.oid {
+            // id-sha1
+            ID_SHA1_OID => Some(ShaHash::Sha1),
+            // id-sha256
+            ID_SHA256_OID => Some(ShaHash::Sha256),
+            // id-sha384
+            ID_SHA384_OID => Some(ShaHash::Sha384),
+            // id-sha256
+            ID_SHA512_OID => Some(ShaHash::Sha512),
+            _ => return Err(data_error("unsupported hash algorithm")),
+          };
+
+          if params.mask_gen_algorithm.oid != ID_MFG1 {
+            return Err(not_supported_error("unsupported mask gen algorithm"));
+          }
+
+          // TODO(lucacasonato):
+          // If the parameters field of the maskGenAlgorithm field of params
+          // is not an instance of the HashAlgorithm ASN.1 type that is
+          // identical in content to the hashAlgorithm field of params,
+          // throw a NotSupportedError.
+
+          hash
+        }
+        _ => return Err(data_error("unsupported algorithm")),
+      };
+
+      // 7.
+      if let Some(pk_hash) = pk_hash {
+        if pk_hash != hash {
+          return Err(data_error("hash mismatch"));
+        }
+      }
+
+      // 8-9.
+      let private_key =
+        rsa::pkcs1::RsaPrivateKey::from_der(pk_info.private_key)
+          .map_err(|e| data_error(e.to_string()))?;
+
+      let bytes_consumed = private_key
+        .encoded_len()
+        .map_err(|e| data_error(e.to_string()))?;
+
+      if bytes_consumed
+        != spki::der::Length::new(pk_info.private_key.len() as u16)
+      {
+        return Err(data_error("private key is invalid (too long)"));
+      }
+
+      let data = pk_info.private_key.to_vec().into();
+      let public_exponent =
+        private_key.public_exponent.as_bytes().to_vec().into();
+      let modulus_length = private_key.modulus.as_bytes().len() * 8;
+
+      Ok(ImportKeyResult::Rsa {
+        raw_data: RawKeyData::Private(data),
+        modulus_length,
+        public_exponent,
+      })
+    }
+    // TODO(lucacasonato): support JWK encoding
+    _ => Err(unsupported_format()),
+  }
+}
+
+fn import_key_rsaoaep(
+  key_data: KeyData,
+  hash: ShaHash,
+) -> Result<ImportKeyResult, deno_core::anyhow::Error> {
+  match key_data {
+    KeyData::Spki(data) => {
+      // 2-3.
+      let pk_info = spki::SubjectPublicKeyInfo::from_der(&data)
+        .map_err(|e| data_error(e.to_string()))?;
+
+      // 4-5.
+      let alg = pk_info.algorithm.oid;
+
+      // 6.
+      let pk_hash = match alg {
+        // rsaEncryption
+        RSA_ENCRYPTION_OID => None,
+        // id-RSAES-OAEP
+        RSAES_OAEP_OID => {
+          let params = OaepPrivateKeyParameters::try_from(
+            pk_info
+              .algorithm
+              .parameters
+              .ok_or_else(|| data_error("malformed parameters"))?,
+          )
+          .map_err(|_| data_error("malformed parameters"))?;
+
+          let hash_alg = params.hash_algorithm;
+          let hash = match hash_alg.oid {
+            // id-sha1
+            ID_SHA1_OID => Some(ShaHash::Sha1),
+            // id-sha256
+            ID_SHA256_OID => Some(ShaHash::Sha256),
+            // id-sha384
+            ID_SHA384_OID => Some(ShaHash::Sha384),
+            // id-sha256
+            ID_SHA512_OID => Some(ShaHash::Sha512),
+            _ => return Err(data_error("unsupported hash algorithm")),
+          };
+
+          if params.mask_gen_algorithm.oid != ID_MFG1 {
+            return Err(not_supported_error("unsupported hash algorithm"));
+          }
+
+          // TODO(lucacasonato):
+          // If the parameters field of the maskGenAlgorithm field of params
+          // is not an instance of the HashAlgorithm ASN.1 type that is
+          // identical in content to the hashAlgorithm field of params,
+          // throw a NotSupportedError.
+
+          hash
+        }
+        _ => return Err(data_error("unsupported algorithm")),
+      };
+
+      // 7.
+      if let Some(pk_hash) = pk_hash {
+        if pk_hash != hash {
+          return Err(data_error("hash mismatch"));
+        }
+      }
+
+      // 8-9.
+      let public_key =
+        rsa::pkcs1::RsaPublicKey::from_der(pk_info.subject_public_key)
+          .map_err(|e| data_error(e.to_string()))?;
+
+      let bytes_consumed = public_key
+        .encoded_len()
+        .map_err(|e| data_error(e.to_string()))?;
+
+      if bytes_consumed
+        != spki::der::Length::new(pk_info.subject_public_key.len() as u16)
+      {
+        return Err(data_error("public key is invalid (too long)"));
+      }
+
+      let data = pk_info.subject_public_key.to_vec().into();
+      let public_exponent =
+        public_key.public_exponent.as_bytes().to_vec().into();
+      let modulus_length = public_key.modulus.as_bytes().len() * 8;
+
+      Ok(ImportKeyResult::Rsa {
+        raw_data: RawKeyData::Public(data),
+        modulus_length,
+        public_exponent,
+      })
+    }
+    KeyData::Pkcs8(data) => {
+      // 2-3.
+      let pk_info = rsa::pkcs8::PrivateKeyInfo::from_der(&data)
+        .map_err(|e| data_error(e.to_string()))?;
+
+      // 4-5.
+      let alg = pk_info.algorithm.oid;
+
+      // 6.
+      // 6.
+      let pk_hash = match alg {
+        // rsaEncryption
+        RSA_ENCRYPTION_OID => None,
+        // id-RSAES-OAEP
+        RSAES_OAEP_OID => {
+          let params = OaepPrivateKeyParameters::try_from(
+            pk_info
+              .algorithm
+              .parameters
+              .ok_or_else(|| not_supported_error("malformed parameters"))?,
+          )
+          .map_err(|_| not_supported_error("malformed parameters"))?;
+
+          let hash_alg = params.hash_algorithm;
+          let hash = match hash_alg.oid {
+            // id-sha1
+            ID_SHA1_OID => Some(ShaHash::Sha1),
+            // id-sha256
+            ID_SHA256_OID => Some(ShaHash::Sha256),
+            // id-sha384
+            ID_SHA384_OID => Some(ShaHash::Sha384),
+            // id-sha256
+            ID_SHA512_OID => Some(ShaHash::Sha512),
+            _ => return Err(data_error("unsupported hash algorithm")),
+          };
+
+          if params.mask_gen_algorithm.oid != ID_MFG1 {
+            return Err(not_supported_error("unsupported mask gen algorithm"));
+          }
+
+          // TODO(lucacasonato):
+          // If the parameters field of the maskGenAlgorithm field of params
+          // is not an instance of the HashAlgorithm ASN.1 type that is
+          // identical in content to the hashAlgorithm field of params,
+          // throw a NotSupportedError.
+
+          hash
+        }
+        _ => return Err(data_error("unsupported algorithm")),
+      };
+
+      // 7.
+      if let Some(pk_hash) = pk_hash {
+        if pk_hash != hash {
+          return Err(data_error("hash mismatch"));
+        }
+      }
+
+      // 8-9.
+      let private_key =
+        rsa::pkcs1::RsaPrivateKey::from_der(pk_info.private_key)
+          .map_err(|e| data_error(e.to_string()))?;
+
+      let bytes_consumed = private_key
+        .encoded_len()
+        .map_err(|e| data_error(e.to_string()))?;
+
+      if bytes_consumed
+        != spki::der::Length::new(pk_info.private_key.len() as u16)
+      {
+        return Err(data_error("private key is invalid (too long)"));
+      }
+
+      let data = pk_info.private_key.to_vec().into();
+      let public_exponent =
+        private_key.public_exponent.as_bytes().to_vec().into();
+      let modulus_length = private_key.modulus.as_bytes().len() * 8;
+
+      Ok(ImportKeyResult::Rsa {
+        raw_data: RawKeyData::Private(data),
+        modulus_length,
+        public_exponent,
+      })
+    }
+    // TODO(lucacasonato): support JWK encoding
+    _ => Err(unsupported_format()),
+  }
+}
+
+fn import_key_ec(
+  key_data: KeyData,
+  named_curve: EcNamedCurve,
+) -> Result<ImportKeyResult, AnyError> {
+  Ok(match key_data {
+    KeyData::Raw(data) => {
+      // The point is parsed and validated, ultimately the original data is
+      // returned though.
+      match named_curve {
+        EcNamedCurve::P256 => {
+          // 1-2.
+          let point = p256::EncodedPoint::from_bytes(&data)
+            .map_err(|_| data_error("invalid P-256 eliptic curve point"))?;
+          // 3.
+          if point.is_identity() {
+            return Err(data_error("invalid P-256 eliptic curve point"));
+          }
+        }
+        EcNamedCurve::P384 => {
+          // 1-2.
+          let point = p384::EncodedPoint::from_bytes(&data)
+            .map_err(|_| data_error("invalid P-384 eliptic curve point"))?;
+          // 3.
+          if point.is_identity() {
+            return Err(data_error("invalid P-384 eliptic curve point"));
+          }
+        }
+      };
+      ImportKeyResult::Ec {
+        raw_data: RawKeyData::Public(data),
+      }
+    }
+    _ => return Err(unsupported_format()),
+  })
+}
diff --git a/ext/crypto/lib.rs b/ext/crypto/lib.rs
index d811e504db..379b101a29 100644
--- a/ext/crypto/lib.rs
+++ b/ext/crypto/lib.rs
@@ -11,7 +11,6 @@ use deno_core::Extension;
 use deno_core::OpState;
 use deno_core::ZeroCopyBuf;
 use serde::Deserialize;
-use serde::Serialize;
 
 use std::cell::RefCell;
 use std::num::NonZeroU32;
@@ -57,46 +56,26 @@ use std::path::PathBuf;
 
 pub use rand; // Re-export rand
 
+mod import_key;
 mod key;
+mod shared;
 
 use crate::key::Algorithm;
 use crate::key::CryptoHash;
 use crate::key::CryptoNamedCurve;
 use crate::key::HkdfOutput;
 
+pub use crate::import_key::op_crypto_import_key;
+use crate::shared::ID_MFG1;
+use crate::shared::ID_P_SPECIFIED;
+use crate::shared::ID_SHA1_OID;
+
 // Allowlist for RSA public exponents.
 lazy_static! {
   static ref PUB_EXPONENT_1: BigUint = BigUint::from_u64(3).unwrap();
   static ref PUB_EXPONENT_2: BigUint = BigUint::from_u64(65537).unwrap();
 }
 
-const RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.1");
-const SHA1_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.5");
-const SHA256_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.11");
-const SHA384_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.12");
-const SHA512_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.13");
-const RSASSA_PSS_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.10");
-const ID_SHA1_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.3.14.3.2.26");
-const ID_SHA256_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("2.16.840.1.101.3.4.2.1");
-const ID_SHA384_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("2.16.840.1.101.3.4.2.2");
-const ID_SHA512_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("2.16.840.1.101.3.4.2.3");
-const ID_MFG1: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.8");
-const RSAES_OAEP_OID: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.7");
-const ID_P_SPECIFIED: rsa::pkcs8::ObjectIdentifier =
-  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.9");
-
 pub fn init(maybe_seed: Option<u64>) -> Extension {
   Extension::builder()
     .js(include_js_files!(
@@ -113,7 +92,7 @@ pub fn init(maybe_seed: Option<u64>) -> Extension {
       ("op_crypto_sign_key", op_async(op_crypto_sign_key)),
       ("op_crypto_verify_key", op_async(op_crypto_verify_key)),
       ("op_crypto_derive_bits", op_async(op_crypto_derive_bits)),
-      ("op_crypto_import_key", op_async(op_crypto_import_key)),
+      ("op_crypto_import_key", op_sync(op_crypto_import_key)),
       ("op_crypto_export_key", op_async(op_crypto_export_key)),
       ("op_crypto_encrypt_key", op_async(op_crypto_encrypt_key)),
       ("op_crypto_decrypt_key", op_async(op_crypto_decrypt_key)),
@@ -1176,684 +1155,6 @@ impl<'a> TryFrom<rsa::pkcs8::der::asn1::Any<'a>>
   }
 }
 
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ImportKeyArg {
-  algorithm: Algorithm,
-  format: KeyFormat,
-  // RSASSA-PKCS1-v1_5
-  hash: Option<CryptoHash>,
-  // ECDSA
-  named_curve: Option<CryptoNamedCurve>,
-}
-
-#[derive(Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ImportKeyResult {
-  data: ZeroCopyBuf,
-  // RSASSA-PKCS1-v1_5
-  public_exponent: Option<ZeroCopyBuf>,
-  modulus_length: Option<usize>,
-}
-
-pub async fn op_crypto_import_key(
-  _state: Rc<RefCell<OpState>>,
-  args: ImportKeyArg,
-  zero_copy: ZeroCopyBuf,
-) -> Result<ImportKeyResult, AnyError> {
-  let data = &*zero_copy;
-  let algorithm = args.algorithm;
-
-  match algorithm {
-    Algorithm::Ecdsa => {
-      let curve = args.named_curve.ok_or_else(|| {
-        type_error("Missing argument named_curve".to_string())
-      })?;
-
-      match curve {
-        CryptoNamedCurve::P256 => {
-          // 1-2.
-          let point = p256::EncodedPoint::from_bytes(data)?;
-          // 3.
-          if point.is_identity() {
-            return Err(type_error("Invalid key data".to_string()));
-          }
-        }
-        CryptoNamedCurve::P384 => {
-          // 1-2.
-          let point = p384::EncodedPoint::from_bytes(data)?;
-          // 3.
-          if point.is_identity() {
-            return Err(type_error("Invalid key data".to_string()));
-          }
-        }
-      };
-
-      Ok(ImportKeyResult {
-        data: zero_copy,
-        modulus_length: None,
-        public_exponent: None,
-      })
-    }
-    Algorithm::RsassaPkcs1v15 => {
-      match args.format {
-        KeyFormat::Pkcs8 => {
-          let hash = args
-            .hash
-            .ok_or_else(|| type_error("Missing argument hash".to_string()))?;
-
-          // 2-3.
-          let pk_info =
-            rsa::pkcs8::PrivateKeyInfo::from_der(data).map_err(|e| {
-              custom_error("DOMExceptionDataError", e.to_string())
-            })?;
-
-          // 4-5.
-          let alg = pk_info.algorithm.oid;
-
-          // 6.
-          let pk_hash = match alg {
-            // rsaEncryption
-            RSA_ENCRYPTION_OID => None,
-            // sha1WithRSAEncryption
-            SHA1_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha1),
-            // sha256WithRSAEncryption
-            SHA256_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha256),
-            // sha384WithRSAEncryption
-            SHA384_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha384),
-            // sha512WithRSAEncryption
-            SHA512_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha512),
-            _ => {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Unsupported algorithm".to_string(),
-              ))
-            }
-          };
-
-          // 7.
-          if let Some(pk_hash) = pk_hash {
-            if pk_hash != hash {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Hash mismatch".to_string(),
-              ));
-            }
-          }
-
-          // 8-9.
-          let private_key = rsa::pkcs1::RsaPrivateKey::from_der(
-            pk_info.private_key,
-          )
-          .map_err(|e| custom_error("DOMExceptionDataError", e.to_string()))?;
-
-          let bytes_consumed = private_key.encoded_len().map_err(|e| {
-            custom_error("DOMExceptionDataError", e.to_string())
-          })?;
-
-          if bytes_consumed
-            != spki::der::Length::new(pk_info.private_key.len() as u16)
-          {
-            return Err(custom_error(
-              "DOMExceptionDataError",
-              "Some bytes were not consumed".to_string(),
-            ));
-          }
-
-          Ok(ImportKeyResult {
-            data: pk_info.private_key.to_vec().into(),
-            public_exponent: Some(
-              private_key.public_exponent.as_bytes().to_vec().into(),
-            ),
-            modulus_length: Some(private_key.modulus.as_bytes().len() * 8),
-          })
-        }
-        KeyFormat::Spki => {
-          let hash = args
-            .hash
-            .ok_or_else(|| type_error("Missing argument hash".to_string()))?;
-
-          // 2-3.
-          let pk_info =
-            spki::SubjectPublicKeyInfo::from_der(data).map_err(|e| {
-              custom_error("DOMExceptionDataError", e.to_string())
-            })?;
-
-          // 4-5.
-          let alg = pk_info.algorithm.oid;
-
-          // 6.
-          let pk_hash = match alg {
-            // rsaEncryption
-            RSA_ENCRYPTION_OID => None,
-            // sha1WithRSAEncryption
-            SHA1_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha1),
-            // sha256WithRSAEncryption
-            SHA256_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha256),
-            // sha384WithRSAEncryption
-            SHA384_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha384),
-            // sha512WithRSAEncryption
-            SHA512_RSA_ENCRYPTION_OID => Some(CryptoHash::Sha512),
-            _ => {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Unsupported algorithm".to_string(),
-              ))
-            }
-          };
-
-          // 7.
-          if let Some(pk_hash) = pk_hash {
-            if pk_hash != hash {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Hash mismatch".to_string(),
-              ));
-            }
-          }
-
-          // 8-9.
-          let public_key =
-            rsa::pkcs1::RsaPublicKey::from_der(pk_info.subject_public_key)
-              .map_err(|e| {
-                custom_error("DOMExceptionDataError", e.to_string())
-              })?;
-
-          let bytes_consumed = public_key.encoded_len().map_err(|e| {
-            custom_error("DOMExceptionDataError", e.to_string())
-          })?;
-
-          if bytes_consumed
-            != spki::der::Length::new(pk_info.subject_public_key.len() as u16)
-          {
-            return Err(custom_error(
-              "DOMExceptionDataError",
-              "Some bytes were not consumed".to_string(),
-            ));
-          }
-
-          Ok(ImportKeyResult {
-            data: pk_info.subject_public_key.to_vec().into(),
-            public_exponent: Some(
-              public_key.public_exponent.as_bytes().to_vec().into(),
-            ),
-            modulus_length: Some(public_key.modulus.as_bytes().len() * 8),
-          })
-        }
-        // TODO(@littledivy): jwk
-        _ => Err(type_error("Unsupported format".to_string())),
-      }
-    }
-    Algorithm::RsaPss => {
-      match args.format {
-        KeyFormat::Pkcs8 => {
-          let hash = args
-            .hash
-            .ok_or_else(|| type_error("Missing argument hash".to_string()))?;
-
-          // 2-3.
-          let pk_info =
-            rsa::pkcs8::PrivateKeyInfo::from_der(data).map_err(|e| {
-              custom_error("DOMExceptionDataError", e.to_string())
-            })?;
-
-          // 4-5.
-          let alg = pk_info.algorithm.oid;
-
-          // 6.
-          let pk_hash = match alg {
-            // rsaEncryption
-            RSA_ENCRYPTION_OID => None,
-            // id-RSASSA-PSS
-            RSASSA_PSS_OID => {
-              let params = PssPrivateKeyParameters::try_from(
-                pk_info.algorithm.parameters.ok_or_else(|| {
-                  custom_error(
-                    "DOMExceptionNotSupportedError",
-                    "Malformed parameters".to_string(),
-                  )
-                })?,
-              )
-              .map_err(|_| {
-                custom_error(
-                  "DOMExceptionNotSupportedError",
-                  "Malformed parameters".to_string(),
-                )
-              })?;
-
-              let hash_alg = params.hash_algorithm;
-              let hash = match hash_alg.oid {
-                // id-sha1
-                ID_SHA1_OID => Some(CryptoHash::Sha1),
-                // id-sha256
-                ID_SHA256_OID => Some(CryptoHash::Sha256),
-                // id-sha384
-                ID_SHA384_OID => Some(CryptoHash::Sha384),
-                // id-sha256
-                ID_SHA512_OID => Some(CryptoHash::Sha512),
-                _ => {
-                  return Err(custom_error(
-                    "DOMExceptionDataError",
-                    "Unsupported hash algorithm".to_string(),
-                  ))
-                }
-              };
-
-              if params.mask_gen_algorithm.oid != ID_MFG1 {
-                return Err(custom_error(
-                  "DOMExceptionNotSupportedError",
-                  "Unsupported hash algorithm".to_string(),
-                ));
-              }
-
-              // TODO(lucacasonato):
-              // If the parameters field of the maskGenAlgorithm field of params
-              // is not an instance of the HashAlgorithm ASN.1 type that is
-              // identical in content to the hashAlgorithm field of params,
-              // throw a NotSupportedError.
-
-              hash
-            }
-            _ => {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Unsupported algorithm".to_string(),
-              ))
-            }
-          };
-
-          // 7.
-          if let Some(pk_hash) = pk_hash {
-            if pk_hash != hash {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Hash mismatch".to_string(),
-              ));
-            }
-          }
-
-          // 8-9.
-          let private_key = rsa::pkcs1::RsaPrivateKey::from_der(
-            pk_info.private_key,
-          )
-          .map_err(|e| custom_error("DOMExceptionDataError", e.to_string()))?;
-
-          let bytes_consumed = private_key.encoded_len().map_err(|e| {
-            custom_error("DOMExceptionDataError", e.to_string())
-          })?;
-
-          if bytes_consumed
-            != spki::der::Length::new(pk_info.private_key.len() as u16)
-          {
-            return Err(custom_error(
-              "DOMExceptionDataError",
-              "Some bytes were not consumed".to_string(),
-            ));
-          }
-
-          Ok(ImportKeyResult {
-            data: pk_info.private_key.to_vec().into(),
-            public_exponent: Some(
-              private_key.public_exponent.as_bytes().to_vec().into(),
-            ),
-            modulus_length: Some(private_key.modulus.as_bytes().len() * 8),
-          })
-        }
-        KeyFormat::Spki => {
-          let hash = args
-            .hash
-            .ok_or_else(|| type_error("Missing argument hash".to_string()))?;
-
-          // 2-3.
-          let pk_info =
-            spki::SubjectPublicKeyInfo::from_der(data).map_err(|e| {
-              custom_error("DOMExceptionDataError", e.to_string())
-            })?;
-
-          // 4-5.
-          let alg = pk_info.algorithm.oid;
-
-          // 6.
-          let pk_hash = match alg {
-            // rsaEncryption
-            RSA_ENCRYPTION_OID => None,
-            // id-RSASSA-PSS
-            RSASSA_PSS_OID => {
-              let params = PssPrivateKeyParameters::try_from(
-                pk_info.algorithm.parameters.ok_or_else(|| {
-                  custom_error(
-                    "DOMExceptionDataError",
-                    "Malformed parameters".to_string(),
-                  )
-                })?,
-              )
-              .map_err(|_| {
-                custom_error(
-                  "DOMExceptionDataError",
-                  "Malformed parameters".to_string(),
-                )
-              })?;
-
-              let hash_alg = params.hash_algorithm;
-              let hash = match hash_alg.oid {
-                // id-sha1
-                ID_SHA1_OID => Some(CryptoHash::Sha1),
-                // id-sha256
-                ID_SHA256_OID => Some(CryptoHash::Sha256),
-                // id-sha384
-                ID_SHA384_OID => Some(CryptoHash::Sha384),
-                // id-sha256
-                ID_SHA512_OID => Some(CryptoHash::Sha512),
-                _ => {
-                  return Err(custom_error(
-                    "DOMExceptionDataError",
-                    "Unsupported hash algorithm".to_string(),
-                  ))
-                }
-              };
-
-              if params.mask_gen_algorithm.oid != ID_MFG1 {
-                return Err(custom_error(
-                  "DOMExceptionNotSupportedError",
-                  "Unsupported hash algorithm".to_string(),
-                ));
-              }
-
-              // TODO(lucacasonato):
-              // If the parameters field of the maskGenAlgorithm field of params
-              // is not an instance of the HashAlgorithm ASN.1 type that is
-              // identical in content to the hashAlgorithm field of params,
-              // throw a NotSupportedError.
-
-              hash
-            }
-            _ => {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Unsupported algorithm".to_string(),
-              ))
-            }
-          };
-
-          // 7.
-          if let Some(pk_hash) = pk_hash {
-            if pk_hash != hash {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Hash mismatch".to_string(),
-              ));
-            }
-          }
-
-          // 8-9.
-          let public_key =
-            rsa::pkcs1::RsaPublicKey::from_der(pk_info.subject_public_key)
-              .map_err(|e| {
-                custom_error("DOMExceptionDataError", e.to_string())
-              })?;
-
-          let bytes_consumed = public_key.encoded_len().map_err(|e| {
-            custom_error("DOMExceptionDataError", e.to_string())
-          })?;
-
-          if bytes_consumed
-            != spki::der::Length::new(pk_info.subject_public_key.len() as u16)
-          {
-            return Err(custom_error(
-              "DOMExceptionDataError",
-              "Some bytes were not consumed".to_string(),
-            ));
-          }
-
-          Ok(ImportKeyResult {
-            data: pk_info.subject_public_key.to_vec().into(),
-            public_exponent: Some(
-              public_key.public_exponent.as_bytes().to_vec().into(),
-            ),
-            modulus_length: Some(public_key.modulus.as_bytes().len() * 8),
-          })
-        }
-        // TODO(@littledivy): jwk
-        _ => Err(type_error("Unsupported format".to_string())),
-      }
-    }
-    Algorithm::RsaOaep => {
-      match args.format {
-        KeyFormat::Pkcs8 => {
-          let hash = args
-            .hash
-            .ok_or_else(|| type_error("Missing argument hash".to_string()))?;
-
-          // 2-3.
-          let pk_info =
-            rsa::pkcs8::PrivateKeyInfo::from_der(data).map_err(|e| {
-              custom_error("DOMExceptionDataError", e.to_string())
-            })?;
-
-          // 4-5.
-          let alg = pk_info.algorithm.oid;
-
-          // 6.
-          let pk_hash = match alg {
-            // rsaEncryption
-            RSA_ENCRYPTION_OID => None,
-            // id-RSAES-OAEP
-            RSAES_OAEP_OID => {
-              let params = OaepPrivateKeyParameters::try_from(
-                pk_info.algorithm.parameters.ok_or_else(|| {
-                  custom_error(
-                    "DOMExceptionNotSupportedError",
-                    "Malformed parameters".to_string(),
-                  )
-                })?,
-              )
-              .map_err(|_| {
-                custom_error(
-                  "DOMExceptionNotSupportedError",
-                  "Malformed parameters".to_string(),
-                )
-              })?;
-
-              let hash_alg = params.hash_algorithm;
-              let hash = match hash_alg.oid {
-                // id-sha1
-                ID_SHA1_OID => Some(CryptoHash::Sha1),
-                // id-sha256
-                ID_SHA256_OID => Some(CryptoHash::Sha256),
-                // id-sha384
-                ID_SHA384_OID => Some(CryptoHash::Sha384),
-                // id-sha256
-                ID_SHA512_OID => Some(CryptoHash::Sha512),
-                _ => {
-                  return Err(custom_error(
-                    "DOMExceptionDataError",
-                    "Unsupported hash algorithm".to_string(),
-                  ))
-                }
-              };
-
-              if params.mask_gen_algorithm.oid != ID_MFG1 {
-                return Err(custom_error(
-                  "DOMExceptionNotSupportedError",
-                  "Unsupported hash algorithm".to_string(),
-                ));
-              }
-
-              // TODO(lucacasonato):
-              // If the parameters field of the maskGenAlgorithm field of params
-              // is not an instance of the HashAlgorithm ASN.1 type that is
-              // identical in content to the hashAlgorithm field of params,
-              // throw a NotSupportedError.
-
-              hash
-            }
-            _ => {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Unsupported algorithm".to_string(),
-              ))
-            }
-          };
-
-          // 7.
-          if let Some(pk_hash) = pk_hash {
-            if pk_hash != hash {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Hash mismatch".to_string(),
-              ));
-            }
-          }
-
-          // 8-9.
-          let private_key = rsa::pkcs1::RsaPrivateKey::from_der(
-            pk_info.private_key,
-          )
-          .map_err(|e| custom_error("DOMExceptionDataError", e.to_string()))?;
-
-          let bytes_consumed = private_key.encoded_len().map_err(|e| {
-            custom_error("DOMExceptionDataError", e.to_string())
-          })?;
-
-          if bytes_consumed
-            != spki::der::Length::new(pk_info.private_key.len() as u16)
-          {
-            return Err(custom_error(
-              "DOMExceptionDataError",
-              "Some bytes were not consumed".to_string(),
-            ));
-          }
-
-          Ok(ImportKeyResult {
-            data: pk_info.private_key.to_vec().into(),
-            public_exponent: Some(
-              private_key.public_exponent.as_bytes().to_vec().into(),
-            ),
-            modulus_length: Some(private_key.modulus.as_bytes().len() * 8),
-          })
-        }
-        KeyFormat::Spki => {
-          let hash = args
-            .hash
-            .ok_or_else(|| type_error("Missing argument hash".to_string()))?;
-
-          // 2-3.
-          let pk_info =
-            spki::SubjectPublicKeyInfo::from_der(data).map_err(|e| {
-              custom_error("DOMExceptionDataError", e.to_string())
-            })?;
-
-          // 4-5.
-          let alg = pk_info.algorithm.oid;
-
-          // 6.
-          let pk_hash = match alg {
-            // rsaEncryption
-            RSA_ENCRYPTION_OID => None,
-            // id-RSAES-OAEP
-            RSAES_OAEP_OID => {
-              let params = OaepPrivateKeyParameters::try_from(
-                pk_info.algorithm.parameters.ok_or_else(|| {
-                  custom_error(
-                    "DOMExceptionDataError",
-                    "Malformed parameters".to_string(),
-                  )
-                })?,
-              )
-              .map_err(|_| {
-                custom_error(
-                  "DOMExceptionDataError",
-                  "Malformed parameters".to_string(),
-                )
-              })?;
-
-              let hash_alg = params.hash_algorithm;
-              let hash = match hash_alg.oid {
-                // id-sha1
-                ID_SHA1_OID => Some(CryptoHash::Sha1),
-                // id-sha256
-                ID_SHA256_OID => Some(CryptoHash::Sha256),
-                // id-sha384
-                ID_SHA384_OID => Some(CryptoHash::Sha384),
-                // id-sha256
-                ID_SHA512_OID => Some(CryptoHash::Sha512),
-                _ => {
-                  return Err(custom_error(
-                    "DOMExceptionDataError",
-                    "Unsupported hash algorithm".to_string(),
-                  ))
-                }
-              };
-
-              if params.mask_gen_algorithm.oid != ID_MFG1 {
-                return Err(custom_error(
-                  "DOMExceptionDataError",
-                  "Unsupported hash algorithm".to_string(),
-                ));
-              }
-
-              // TODO(lucacasonato):
-              // If the parameters field of the maskGenAlgorithm field of params
-              // is not an instance of the HashAlgorithm ASN.1 type that is
-              // identical in content to the hashAlgorithm field of params,
-              // throw a NotSupportedError.
-
-              hash
-            }
-            _ => {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Unsupported algorithm".to_string(),
-              ))
-            }
-          };
-
-          // 7.
-          if let Some(pk_hash) = pk_hash {
-            if pk_hash != hash {
-              return Err(custom_error(
-                "DOMExceptionDataError",
-                "Hash mismatch".to_string(),
-              ));
-            }
-          }
-
-          // 8-9.
-          let public_key =
-            rsa::pkcs1::RsaPublicKey::from_der(pk_info.subject_public_key)
-              .map_err(|e| {
-                custom_error("DOMExceptionDataError", e.to_string())
-              })?;
-
-          let bytes_consumed = public_key.encoded_len().map_err(|e| {
-            custom_error("DOMExceptionDataError", e.to_string())
-          })?;
-
-          if bytes_consumed
-            != spki::der::Length::new(pk_info.subject_public_key.len() as u16)
-          {
-            return Err(custom_error(
-              "DOMExceptionDataError",
-              "Some bytes were not consumed".to_string(),
-            ));
-          }
-
-          Ok(ImportKeyResult {
-            data: pk_info.subject_public_key.to_vec().into(),
-            public_exponent: Some(
-              public_key.public_exponent.as_bytes().to_vec().into(),
-            ),
-            modulus_length: Some(public_key.modulus.as_bytes().len() * 8),
-          })
-        }
-        // TODO(@littledivy): jwk
-        _ => Err(type_error("Unsupported format".to_string())),
-      }
-    }
-    _ => Err(type_error("Unsupported algorithm".to_string())),
-  }
-}
-
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct DecryptArg {
diff --git a/ext/crypto/shared.rs b/ext/crypto/shared.rs
new file mode 100644
index 0000000000..696b1c087c
--- /dev/null
+++ b/ext/crypto/shared.rs
@@ -0,0 +1,74 @@
+use std::borrow::Cow;
+
+use deno_core::error::custom_error;
+use deno_core::error::AnyError;
+use deno_core::ZeroCopyBuf;
+use serde::Deserialize;
+use serde::Serialize;
+
+pub const RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.1");
+pub const SHA1_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.5");
+pub const SHA256_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.11");
+pub const SHA384_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.12");
+pub const SHA512_RSA_ENCRYPTION_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.13");
+pub const RSASSA_PSS_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.10");
+pub const ID_SHA1_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.3.14.3.2.26");
+pub const ID_SHA256_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("2.16.840.1.101.3.4.2.1");
+pub const ID_SHA384_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("2.16.840.1.101.3.4.2.2");
+pub const ID_SHA512_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("2.16.840.1.101.3.4.2.3");
+pub const ID_MFG1: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.8");
+pub const RSAES_OAEP_OID: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.7");
+pub const ID_P_SPECIFIED: rsa::pkcs8::ObjectIdentifier =
+  rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.9");
+
+#[derive(Serialize, Deserialize, Copy, Clone, PartialEq)]
+pub enum ShaHash {
+  #[serde(rename = "SHA-1")]
+  Sha1,
+  #[serde(rename = "SHA-256")]
+  Sha256,
+  #[serde(rename = "SHA-384")]
+  Sha384,
+  #[serde(rename = "SHA-512")]
+  Sha512,
+}
+
+#[derive(Serialize, Deserialize, Copy, Clone, PartialEq)]
+pub enum EcNamedCurve {
+  #[serde(rename = "P-256")]
+  P256,
+  #[serde(rename = "P-384")]
+  P384,
+}
+
+#[derive(Serialize, Deserialize)]
+#[serde(rename_all = "lowercase", tag = "type", content = "data")]
+pub enum RawKeyData {
+  Secret(ZeroCopyBuf),
+  Private(ZeroCopyBuf),
+  Public(ZeroCopyBuf),
+}
+
+pub fn data_error(msg: impl Into<Cow<'static, str>>) -> AnyError {
+  custom_error("DOMExceptionDataError", msg)
+}
+
+pub fn not_supported_error(msg: impl Into<Cow<'static, str>>) -> AnyError {
+  custom_error("DOMExceptionNotSupportedError", msg)
+}
+
+pub fn unsupported_format() -> AnyError {
+  not_supported_error("unsupported format")
+}