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denoland-deno/ext/crypto/lib.rs
Bartek Iwańczuk 8e31bbbe55
chore: update to Rust edition 2021 (#12578)
2021-11-02 10:03:37 -04:00

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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use deno_core::error::custom_error;
use deno_core::error::not_supported;
use deno_core::error::type_error;
use deno_core::error::AnyError;
use deno_core::include_js_files;
use deno_core::op_async;
use deno_core::op_sync;
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;
use std::rc::Rc;
use block_modes::BlockMode;
use lazy_static::lazy_static;
use num_traits::cast::FromPrimitive;
use rand::rngs::OsRng;
use rand::rngs::StdRng;
use rand::thread_rng;
use rand::Rng;
use rand::SeedableRng;
use ring::digest;
use ring::hkdf;
use ring::hmac::Algorithm as HmacAlgorithm;
use ring::hmac::Key as HmacKey;
use ring::pbkdf2;
use ring::rand as RingRand;
use ring::rand::SecureRandom;
use ring::signature::EcdsaKeyPair;
use ring::signature::EcdsaSigningAlgorithm;
use ring::signature::EcdsaVerificationAlgorithm;
use ring::signature::KeyPair;
use rsa::padding::PaddingScheme;
use rsa::pkcs1::der::Decodable;
use rsa::pkcs1::der::Encodable;
use rsa::pkcs1::FromRsaPrivateKey;
use rsa::pkcs1::ToRsaPrivateKey;
use rsa::pkcs8::der::asn1;
use rsa::pkcs8::FromPrivateKey;
use rsa::BigUint;
use rsa::PublicKey;
use rsa::RsaPrivateKey;
use rsa::RsaPublicKey;
use sha1::Sha1;
use sha2::Digest;
use sha2::Sha256;
use sha2::Sha384;
use sha2::Sha512;
use std::path::PathBuf;
pub use rand; // Re-export rand
mod key;
use crate::key::Algorithm;
use crate::key::CryptoHash;
use crate::key::CryptoNamedCurve;
use crate::key::HkdfOutput;
// 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!(
prefix "deno:ext/crypto",
"00_crypto.js",
"01_webidl.js",
))
.ops(vec![
(
"op_crypto_get_random_values",
op_sync(op_crypto_get_random_values),
),
("op_crypto_generate_key", op_async(op_crypto_generate_key)),
("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_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)),
("op_crypto_subtle_digest", op_async(op_crypto_subtle_digest)),
("op_crypto_random_uuid", op_sync(op_crypto_random_uuid)),
])
.state(move |state| {
if let Some(seed) = maybe_seed {
state.put(StdRng::seed_from_u64(seed));
}
Ok(())
})
.build()
}
pub fn op_crypto_get_random_values(
state: &mut OpState,
mut zero_copy: ZeroCopyBuf,
_: (),
) -> Result<(), AnyError> {
if zero_copy.len() > 65536 {
return Err(
deno_web::DomExceptionQuotaExceededError::new(&format!("The ArrayBufferView's byte length ({}) exceeds the number of bytes of entropy available via this API (65536)", zero_copy.len()))
.into(),
);
}
let maybe_seeded_rng = state.try_borrow_mut::<StdRng>();
if let Some(seeded_rng) = maybe_seeded_rng {
seeded_rng.fill(&mut *zero_copy);
} else {
let mut rng = thread_rng();
rng.fill(&mut *zero_copy);
}
Ok(())
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct AlgorithmArg {
name: Algorithm,
modulus_length: Option<u32>,
public_exponent: Option<ZeroCopyBuf>,
named_curve: Option<CryptoNamedCurve>,
hash: Option<CryptoHash>,
length: Option<usize>,
}
pub async fn op_crypto_generate_key(
_state: Rc<RefCell<OpState>>,
args: AlgorithmArg,
_: (),
) -> Result<ZeroCopyBuf, AnyError> {
let algorithm = args.name;
let key = match algorithm {
Algorithm::RsassaPkcs1v15 | Algorithm::RsaPss | Algorithm::RsaOaep => {
let public_exponent = args.public_exponent.ok_or_else(not_supported)?;
let modulus_length = args.modulus_length.ok_or_else(not_supported)?;
let exponent = BigUint::from_bytes_be(&public_exponent);
if exponent != *PUB_EXPONENT_1 && exponent != *PUB_EXPONENT_2 {
return Err(custom_error(
"DOMExceptionOperationError",
"Bad public exponent",
));
}
let mut rng = OsRng;
let private_key: RsaPrivateKey = tokio::task::spawn_blocking(
move || -> Result<RsaPrivateKey, rsa::errors::Error> {
RsaPrivateKey::new_with_exp(
&mut rng,
modulus_length as usize,
&exponent,
)
},
)
.await
.unwrap()
.map_err(|e| custom_error("DOMExceptionOperationError", e.to_string()))?;
private_key.to_pkcs1_der()?.as_ref().to_vec()
}
Algorithm::Ecdsa | Algorithm::Ecdh => {
let curve: &EcdsaSigningAlgorithm =
args.named_curve.ok_or_else(not_supported)?.into();
let rng = RingRand::SystemRandom::new();
let private_key: Vec<u8> = tokio::task::spawn_blocking(
move || -> Result<Vec<u8>, ring::error::Unspecified> {
let pkcs8 = EcdsaKeyPair::generate_pkcs8(curve, &rng)?;
Ok(pkcs8.as_ref().to_vec())
},
)
.await
.unwrap()
.map_err(|_| {
custom_error("DOMExceptionOperationError", "Key generation failed")
})?;
private_key
}
Algorithm::AesCtr
| Algorithm::AesCbc
| Algorithm::AesGcm
| Algorithm::AesKw => {
let length = args.length.ok_or_else(not_supported)?;
// Caller must guarantee divisibility by 8
let mut key_data = vec![0u8; length / 8];
let rng = RingRand::SystemRandom::new();
rng.fill(&mut key_data).map_err(|_| {
custom_error("DOMExceptionOperationError", "Key generation failed")
})?;
key_data
}
Algorithm::Hmac => {
let hash: HmacAlgorithm = args.hash.ok_or_else(not_supported)?.into();
let length = if let Some(length) = args.length {
if (length % 8) != 0 {
return Err(custom_error(
"DOMExceptionOperationError",
"hmac block length must be byte aligned",
));
}
let length = length / 8;
if length > ring::digest::MAX_BLOCK_LEN {
return Err(custom_error(
"DOMExceptionOperationError",
"hmac block length is too large",
));
}
length
} else {
hash.digest_algorithm().block_len
};
let rng = RingRand::SystemRandom::new();
let mut key_bytes = [0; ring::digest::MAX_BLOCK_LEN];
let key_bytes = &mut key_bytes[..length];
rng.fill(key_bytes).map_err(|_| {
custom_error("DOMExceptionOperationError", "Key generation failed")
})?;
key_bytes.to_vec()
}
_ => return Err(not_supported()),
};
Ok(key.into())
}
#[derive(Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum KeyFormat {
Raw,
Pkcs8,
Spki,
}
#[derive(Deserialize)]
#[serde(rename_all = "lowercase")]
pub struct KeyData {
// TODO(littledivy): Kept here to be used to importKey() in future.
#[allow(dead_code)]
r#type: KeyFormat,
data: ZeroCopyBuf,
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct SignArg {
key: KeyData,
algorithm: Algorithm,
salt_length: Option<u32>,
hash: Option<CryptoHash>,
named_curve: Option<CryptoNamedCurve>,
}
pub async fn op_crypto_sign_key(
_state: Rc<RefCell<OpState>>,
args: SignArg,
zero_copy: ZeroCopyBuf,
) -> Result<ZeroCopyBuf, AnyError> {
let data = &*zero_copy;
let algorithm = args.algorithm;
let signature = match algorithm {
Algorithm::RsassaPkcs1v15 => {
let private_key = RsaPrivateKey::from_pkcs1_der(&*args.key.data)?;
let (padding, hashed) = match args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?
{
CryptoHash::Sha1 => {
let mut hasher = Sha1::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA1),
},
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha256 => {
let mut hasher = Sha256::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA2_256),
},
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha384 => {
let mut hasher = Sha384::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA2_384),
},
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha512 => {
let mut hasher = Sha512::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA2_512),
},
hasher.finalize()[..].to_vec(),
)
}
};
private_key.sign(padding, &hashed)?
}
Algorithm::RsaPss => {
let private_key = RsaPrivateKey::from_pkcs1_der(&*args.key.data)?;
let salt_len = args
.salt_length
.ok_or_else(|| type_error("Missing argument saltLength".to_string()))?
as usize;
let rng = OsRng;
let (padding, digest_in) = match args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?
{
CryptoHash::Sha1 => {
let mut hasher = Sha1::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha1, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha256 => {
let mut hasher = Sha256::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha256, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha384 => {
let mut hasher = Sha384::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha384, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha512 => {
let mut hasher = Sha512::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha512, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
};
// Sign data based on computed padding and return buffer
private_key.sign(padding, &digest_in)?
}
Algorithm::Ecdsa => {
let curve: &EcdsaSigningAlgorithm =
args.named_curve.ok_or_else(not_supported)?.try_into()?;
let key_pair = EcdsaKeyPair::from_pkcs8(curve, &*args.key.data)?;
// We only support P256-SHA256 & P384-SHA384. These are recommended signature pairs.
// https://briansmith.org/rustdoc/ring/signature/index.html#statics
if let Some(hash) = args.hash {
match hash {
CryptoHash::Sha256 | CryptoHash::Sha384 => (),
_ => return Err(type_error("Unsupported algorithm")),
}
};
let rng = RingRand::SystemRandom::new();
let signature = key_pair.sign(&rng, data)?;
// Signature data as buffer.
signature.as_ref().to_vec()
}
Algorithm::Hmac => {
let hash: HmacAlgorithm = args.hash.ok_or_else(not_supported)?.into();
let key = HmacKey::new(hash, &*args.key.data);
let signature = ring::hmac::sign(&key, data);
signature.as_ref().to_vec()
}
_ => return Err(type_error("Unsupported algorithm".to_string())),
};
Ok(signature.into())
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct VerifyArg {
key: KeyData,
algorithm: Algorithm,
salt_length: Option<u32>,
hash: Option<CryptoHash>,
signature: ZeroCopyBuf,
named_curve: Option<CryptoNamedCurve>,
}
pub async fn op_crypto_verify_key(
_state: Rc<RefCell<OpState>>,
args: VerifyArg,
zero_copy: ZeroCopyBuf,
) -> Result<bool, AnyError> {
let data = &*zero_copy;
let algorithm = args.algorithm;
let verification = match algorithm {
Algorithm::RsassaPkcs1v15 => {
let public_key: RsaPublicKey =
RsaPrivateKey::from_pkcs1_der(&*args.key.data)?.to_public_key();
let (padding, hashed) = match args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?
{
CryptoHash::Sha1 => {
let mut hasher = Sha1::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA1),
},
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha256 => {
let mut hasher = Sha256::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA2_256),
},
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha384 => {
let mut hasher = Sha384::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA2_384),
},
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha512 => {
let mut hasher = Sha512::new();
hasher.update(&data);
(
PaddingScheme::PKCS1v15Sign {
hash: Some(rsa::hash::Hash::SHA2_512),
},
hasher.finalize()[..].to_vec(),
)
}
};
public_key
.verify(padding, &hashed, &*args.signature)
.is_ok()
}
Algorithm::RsaPss => {
let salt_len = args
.salt_length
.ok_or_else(|| type_error("Missing argument saltLength".to_string()))?
as usize;
let public_key: RsaPublicKey =
RsaPrivateKey::from_pkcs1_der(&*args.key.data)?.to_public_key();
let rng = OsRng;
let (padding, hashed) = match args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?
{
CryptoHash::Sha1 => {
let mut hasher = Sha1::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha1, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha256 => {
let mut hasher = Sha256::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha256, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha384 => {
let mut hasher = Sha384::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha384, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
CryptoHash::Sha512 => {
let mut hasher = Sha512::new();
hasher.update(&data);
(
PaddingScheme::new_pss_with_salt::<Sha512, _>(rng, salt_len),
hasher.finalize()[..].to_vec(),
)
}
};
public_key
.verify(padding, &hashed, &*args.signature)
.is_ok()
}
Algorithm::Hmac => {
let hash: HmacAlgorithm = args.hash.ok_or_else(not_supported)?.into();
let key = HmacKey::new(hash, &*args.key.data);
ring::hmac::verify(&key, data, &*args.signature).is_ok()
}
Algorithm::Ecdsa => {
let signing_alg: &EcdsaSigningAlgorithm =
args.named_curve.ok_or_else(not_supported)?.try_into()?;
let verify_alg: &EcdsaVerificationAlgorithm =
args.named_curve.ok_or_else(not_supported)?.try_into()?;
let private_key = EcdsaKeyPair::from_pkcs8(signing_alg, &*args.key.data)?;
let public_key_bytes = private_key.public_key().as_ref();
let public_key =
ring::signature::UnparsedPublicKey::new(verify_alg, public_key_bytes);
public_key.verify(data, &*args.signature).is_ok()
}
_ => return Err(type_error("Unsupported algorithm".to_string())),
};
Ok(verification)
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ExportKeyArg {
key: KeyData,
algorithm: Algorithm,
format: KeyFormat,
// RSA-PSS
hash: Option<CryptoHash>,
}
pub async fn op_crypto_export_key(
_state: Rc<RefCell<OpState>>,
args: ExportKeyArg,
_: (),
) -> Result<ZeroCopyBuf, AnyError> {
let algorithm = args.algorithm;
match algorithm {
Algorithm::RsassaPkcs1v15 => {
match args.format {
KeyFormat::Pkcs8 => {
// private_key is a PKCS#1 DER-encoded private key
let private_key = &args.key.data;
// the PKCS#8 v1 structure
// PrivateKeyInfo ::= SEQUENCE {
// version Version,
// privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
// privateKey PrivateKey,
// attributes [0] IMPLICIT Attributes OPTIONAL }
// version is 0 when publickey is None
let pk_info = rsa::pkcs8::PrivateKeyInfo {
attributes: None,
public_key: None,
algorithm: rsa::pkcs8::AlgorithmIdentifier {
// rsaEncryption(1)
oid: rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.1"),
// parameters field should not be ommited (None).
// It MUST have ASN.1 type NULL as per defined in RFC 3279 Section 2.3.1
parameters: Some(asn1::Any::from(asn1::Null)),
},
private_key,
};
Ok(pk_info.to_der().as_ref().to_vec().into())
}
KeyFormat::Spki => {
// public_key is a PKCS#1 DER-encoded public key
let subject_public_key = &args.key.data;
// the SPKI structure
let key_info = spki::SubjectPublicKeyInfo {
algorithm: spki::AlgorithmIdentifier {
// rsaEncryption(1)
oid: spki::ObjectIdentifier::new("1.2.840.113549.1.1.1"),
// parameters field should not be ommited (None).
// It MUST have ASN.1 type NULL.
parameters: Some(asn1::Any::from(asn1::Null)),
},
subject_public_key,
};
// Infallible based on spec because of the way we import and generate keys.
let spki_der = key_info.to_vec().unwrap();
Ok(spki_der.into())
}
// TODO(@littledivy): jwk
_ => unreachable!(),
}
}
Algorithm::RsaPss => {
match args.format {
KeyFormat::Pkcs8 => {
// Intentionally unused but required. Not encoded into PKCS#8 (see below).
let _hash = args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?;
// private_key is a PKCS#1 DER-encoded private key
let private_key = &args.key.data;
// version is 0 when publickey is None
let pk_info = rsa::pkcs8::PrivateKeyInfo {
attributes: None,
public_key: None,
algorithm: rsa::pkcs8::AlgorithmIdentifier {
// Spec wants the OID to be id-RSASSA-PSS (1.2.840.113549.1.1.10) but ring and RSA do not support it.
// Instead, we use rsaEncryption (1.2.840.113549.1.1.1) as specified in RFC 3447.
// Node, Chromium and Firefox also use rsaEncryption (1.2.840.113549.1.1.1) and do not support id-RSASSA-PSS.
// parameters are set to NULL opposed to what spec wants (see above)
oid: rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.1"),
// parameters field should not be ommited (None).
// It MUST have ASN.1 type NULL as per defined in RFC 3279 Section 2.3.1
parameters: Some(asn1::Any::from(asn1::Null)),
},
private_key,
};
Ok(pk_info.to_der().as_ref().to_vec().into())
}
KeyFormat::Spki => {
// Intentionally unused but required. Not encoded into SPKI (see below).
let _hash = args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?;
// public_key is a PKCS#1 DER-encoded public key
let subject_public_key = &args.key.data;
// the SPKI structure
let key_info = spki::SubjectPublicKeyInfo {
algorithm: spki::AlgorithmIdentifier {
// rsaEncryption(1)
oid: spki::ObjectIdentifier::new("1.2.840.113549.1.1.1"),
// parameters field should not be ommited (None).
// It MUST have ASN.1 type NULL.
parameters: Some(asn1::Any::from(asn1::Null)),
},
subject_public_key,
};
// Infallible based on spec because of the way we import and generate keys.
let spki_der = key_info.to_vec().unwrap();
Ok(spki_der.into())
}
// TODO(@littledivy): jwk
_ => unreachable!(),
}
}
Algorithm::RsaOaep => {
match args.format {
KeyFormat::Pkcs8 => {
// Intentionally unused but required. Not encoded into PKCS#8 (see below).
let _hash = args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?;
// private_key is a PKCS#1 DER-encoded private key
let private_key = &args.key.data;
// version is 0 when publickey is None
let pk_info = rsa::pkcs8::PrivateKeyInfo {
attributes: None,
public_key: None,
algorithm: rsa::pkcs8::AlgorithmIdentifier {
// Spec wants the OID to be id-RSAES-OAEP (1.2.840.113549.1.1.10) but ring and RSA crate do not support it.
// Instead, we use rsaEncryption (1.2.840.113549.1.1.1) as specified in RFC 3447.
// Chromium and Firefox also use rsaEncryption (1.2.840.113549.1.1.1) and do not support id-RSAES-OAEP.
// parameters are set to NULL opposed to what spec wants (see above)
oid: rsa::pkcs8::ObjectIdentifier::new("1.2.840.113549.1.1.1"),
// parameters field should not be ommited (None).
// It MUST have ASN.1 type NULL as per defined in RFC 3279 Section 2.3.1
parameters: Some(asn1::Any::from(asn1::Null)),
},
private_key,
};
Ok(pk_info.to_der().as_ref().to_vec().into())
}
KeyFormat::Spki => {
// Intentionally unused but required. Not encoded into SPKI (see below).
let _hash = args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?;
// public_key is a PKCS#1 DER-encoded public key
let subject_public_key = &args.key.data;
// the SPKI structure
let key_info = spki::SubjectPublicKeyInfo {
algorithm: spki::AlgorithmIdentifier {
// rsaEncryption(1)
oid: spki::ObjectIdentifier::new("1.2.840.113549.1.1.1"),
// parameters field should not be ommited (None).
// It MUST have ASN.1 type NULL.
parameters: Some(asn1::Any::from(asn1::Null)),
},
subject_public_key,
};
// Infallible based on spec because of the way we import and generate keys.
let spki_der = key_info.to_vec().unwrap();
Ok(spki_der.into())
}
// TODO(@littledivy): jwk
_ => unreachable!(),
}
}
_ => Err(type_error("Unsupported algorithm".to_string())),
}
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct DeriveKeyArg {
key: KeyData,
algorithm: Algorithm,
hash: Option<CryptoHash>,
length: usize,
iterations: Option<u32>,
// ECDH
public_key: Option<KeyData>,
named_curve: Option<CryptoNamedCurve>,
// HKDF
info: Option<ZeroCopyBuf>,
}
pub async fn op_crypto_derive_bits(
_state: Rc<RefCell<OpState>>,
args: DeriveKeyArg,
zero_copy: Option<ZeroCopyBuf>,
) -> Result<ZeroCopyBuf, AnyError> {
let algorithm = args.algorithm;
match algorithm {
Algorithm::Pbkdf2 => {
let zero_copy = zero_copy.ok_or_else(not_supported)?;
let salt = &*zero_copy;
// The caller must validate these cases.
assert!(args.length > 0);
assert!(args.length % 8 == 0);
let algorithm = match args.hash.ok_or_else(not_supported)? {
CryptoHash::Sha1 => pbkdf2::PBKDF2_HMAC_SHA1,
CryptoHash::Sha256 => pbkdf2::PBKDF2_HMAC_SHA256,
CryptoHash::Sha384 => pbkdf2::PBKDF2_HMAC_SHA384,
CryptoHash::Sha512 => pbkdf2::PBKDF2_HMAC_SHA512,
};
// This will never panic. We have already checked length earlier.
let iterations =
NonZeroU32::new(args.iterations.ok_or_else(not_supported)?).unwrap();
let secret = args.key.data;
let mut out = vec![0; args.length / 8];
pbkdf2::derive(algorithm, iterations, salt, &secret, &mut out);
Ok(out.into())
}
Algorithm::Ecdh => {
let named_curve = args
.named_curve
.ok_or_else(|| type_error("Missing argument namedCurve".to_string()))?;
let public_key = args
.public_key
.ok_or_else(|| type_error("Missing argument publicKey".to_string()))?;
match named_curve {
CryptoNamedCurve::P256 => {
let secret_key = p256::SecretKey::from_pkcs8_der(&args.key.data)?;
let public_key =
p256::SecretKey::from_pkcs8_der(&public_key.data)?.public_key();
let shared_secret = p256::elliptic_curve::ecdh::diffie_hellman(
secret_key.to_secret_scalar(),
public_key.as_affine(),
);
Ok(shared_secret.as_bytes().to_vec().into())
}
// TODO(@littledivy): support for P384
// https://github.com/RustCrypto/elliptic-curves/issues/240
_ => Err(type_error("Unsupported namedCurve".to_string())),
}
}
Algorithm::Hkdf => {
let zero_copy = zero_copy.ok_or_else(not_supported)?;
let salt = &*zero_copy;
let algorithm = match args.hash.ok_or_else(not_supported)? {
CryptoHash::Sha1 => hkdf::HKDF_SHA1_FOR_LEGACY_USE_ONLY,
CryptoHash::Sha256 => hkdf::HKDF_SHA256,
CryptoHash::Sha384 => hkdf::HKDF_SHA384,
CryptoHash::Sha512 => hkdf::HKDF_SHA512,
};
let info = args
.info
.ok_or_else(|| type_error("Missing argument info".to_string()))?;
// IKM
let secret = args.key.data;
// L
let length = args.length / 8;
let salt = hkdf::Salt::new(algorithm, salt);
let prk = salt.extract(&secret);
let info = &[&*info];
let okm = prk.expand(info, HkdfOutput(length))?;
let mut r = vec![0u8; length];
okm.fill(&mut r)?;
Ok(r.into())
}
_ => Err(type_error("Unsupported algorithm".to_string())),
}
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct EncryptArg {
key: KeyData,
algorithm: Algorithm,
// RSA-OAEP
hash: Option<CryptoHash>,
label: Option<ZeroCopyBuf>,
// AES-CBC
iv: Option<ZeroCopyBuf>,
length: Option<usize>,
}
pub async fn op_crypto_encrypt_key(
_state: Rc<RefCell<OpState>>,
args: EncryptArg,
zero_copy: ZeroCopyBuf,
) -> Result<ZeroCopyBuf, AnyError> {
let data = &*zero_copy;
let algorithm = args.algorithm;
match algorithm {
Algorithm::RsaOaep => {
let public_key: RsaPublicKey =
RsaPrivateKey::from_pkcs1_der(&*args.key.data)?.to_public_key();
let label = args.label.map(|l| String::from_utf8_lossy(&*l).to_string());
let mut rng = OsRng;
let padding = match args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?
{
CryptoHash::Sha1 => PaddingScheme::OAEP {
digest: Box::new(Sha1::new()),
mgf_digest: Box::new(Sha1::new()),
label,
},
CryptoHash::Sha256 => PaddingScheme::OAEP {
digest: Box::new(Sha256::new()),
mgf_digest: Box::new(Sha256::new()),
label,
},
CryptoHash::Sha384 => PaddingScheme::OAEP {
digest: Box::new(Sha384::new()),
mgf_digest: Box::new(Sha384::new()),
label,
},
CryptoHash::Sha512 => PaddingScheme::OAEP {
digest: Box::new(Sha512::new()),
mgf_digest: Box::new(Sha512::new()),
label,
},
};
Ok(
public_key
.encrypt(&mut rng, padding, data)
.map_err(|e| {
custom_error("DOMExceptionOperationError", e.to_string())
})?
.into(),
)
}
Algorithm::AesCbc => {
let key = &*args.key.data;
let length = args
.length
.ok_or_else(|| type_error("Missing argument length".to_string()))?;
let iv = args
.iv
.ok_or_else(|| type_error("Missing argument iv".to_string()))?;
// 2-3.
let ciphertext = match length {
128 => {
// Section 10.3 Step 2 of RFC 2315 https://www.rfc-editor.org/rfc/rfc2315
type Aes128Cbc =
block_modes::Cbc<aes::Aes128, block_modes::block_padding::Pkcs7>;
let cipher = Aes128Cbc::new_from_slices(key, &iv)?;
cipher.encrypt_vec(data)
}
192 => {
// Section 10.3 Step 2 of RFC 2315 https://www.rfc-editor.org/rfc/rfc2315
type Aes192Cbc =
block_modes::Cbc<aes::Aes192, block_modes::block_padding::Pkcs7>;
let cipher = Aes192Cbc::new_from_slices(key, &iv)?;
cipher.encrypt_vec(data)
}
256 => {
// Section 10.3 Step 2 of RFC 2315 https://www.rfc-editor.org/rfc/rfc2315
type Aes256Cbc =
block_modes::Cbc<aes::Aes256, block_modes::block_padding::Pkcs7>;
let cipher = Aes256Cbc::new_from_slices(key, &iv)?;
cipher.encrypt_vec(data)
}
_ => unreachable!(),
};
Ok(ciphertext.into())
}
_ => Err(type_error("Unsupported algorithm".to_string())),
}
}
// The parameters field associated with OID id-RSASSA-PSS
// Defined in RFC 3447, section A.2.3
//
// RSASSA-PSS-params ::= SEQUENCE {
// hashAlgorithm [0] HashAlgorithm DEFAULT sha1,
// maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1,
// saltLength [2] INTEGER DEFAULT 20,
// trailerField [3] TrailerField DEFAULT trailerFieldBC
// }
pub struct PssPrivateKeyParameters<'a> {
pub hash_algorithm: rsa::pkcs8::AlgorithmIdentifier<'a>,
pub mask_gen_algorithm: rsa::pkcs8::AlgorithmIdentifier<'a>,
pub salt_length: u32,
}
// Context-specific tag number for hashAlgorithm.
const HASH_ALGORITHM_TAG: rsa::pkcs8::der::TagNumber =
rsa::pkcs8::der::TagNumber::new(0);
// Context-specific tag number for maskGenAlgorithm.
const MASK_GEN_ALGORITHM_TAG: rsa::pkcs8::der::TagNumber =
rsa::pkcs8::der::TagNumber::new(1);
// Context-specific tag number for saltLength.
const SALT_LENGTH_TAG: rsa::pkcs8::der::TagNumber =
rsa::pkcs8::der::TagNumber::new(2);
// Context-specific tag number for pSourceAlgorithm
const P_SOURCE_ALGORITHM_TAG: rsa::pkcs8::der::TagNumber =
rsa::pkcs8::der::TagNumber::new(2);
lazy_static! {
// Default HashAlgorithm for RSASSA-PSS-params (sha1)
//
// sha1 HashAlgorithm ::= {
// algorithm id-sha1,
// parameters SHA1Parameters : NULL
// }
//
// SHA1Parameters ::= NULL
static ref SHA1_HASH_ALGORITHM: rsa::pkcs8::AlgorithmIdentifier<'static> = rsa::pkcs8::AlgorithmIdentifier {
// id-sha1
oid: ID_SHA1_OID,
// NULL
parameters: Some(asn1::Any::from(asn1::Null)),
};
// TODO(@littledivy): `pkcs8` should provide AlgorithmIdentifier to Any conversion.
static ref ENCODED_SHA1_HASH_ALGORITHM: Vec<u8> = SHA1_HASH_ALGORITHM.to_vec().unwrap();
// Default MaskGenAlgrithm for RSASSA-PSS-params (mgf1SHA1)
//
// mgf1SHA1 MaskGenAlgorithm ::= {
// algorithm id-mgf1,
// parameters HashAlgorithm : sha1
// }
static ref MGF1_SHA1_MASK_ALGORITHM: rsa::pkcs8::AlgorithmIdentifier<'static> = rsa::pkcs8::AlgorithmIdentifier {
// id-mgf1
oid: ID_MFG1,
// sha1
parameters: Some(asn1::Any::from_der(&ENCODED_SHA1_HASH_ALGORITHM).unwrap()),
};
// Default PSourceAlgorithm for RSAES-OAEP-params
// The default label is an empty string.
//
// pSpecifiedEmpty PSourceAlgorithm ::= {
// algorithm id-pSpecified,
// parameters EncodingParameters : emptyString
// }
//
// emptyString EncodingParameters ::= ''H
static ref P_SPECIFIED_EMPTY: rsa::pkcs8::AlgorithmIdentifier<'static> = rsa::pkcs8::AlgorithmIdentifier {
// id-pSpecified
oid: ID_P_SPECIFIED,
// EncodingParameters
parameters: Some(asn1::Any::from(asn1::OctetString::new(b"").unwrap())),
};
}
impl<'a> TryFrom<rsa::pkcs8::der::asn1::Any<'a>>
for PssPrivateKeyParameters<'a>
{
type Error = rsa::pkcs8::der::Error;
fn try_from(
any: rsa::pkcs8::der::asn1::Any<'a>,
) -> rsa::pkcs8::der::Result<PssPrivateKeyParameters> {
any.sequence(|decoder| {
let hash_algorithm = decoder
.context_specific(HASH_ALGORITHM_TAG)?
.map(TryInto::try_into)
.transpose()?
.unwrap_or(*SHA1_HASH_ALGORITHM);
let mask_gen_algorithm = decoder
.context_specific(MASK_GEN_ALGORITHM_TAG)?
.map(TryInto::try_into)
.transpose()?
.unwrap_or(*MGF1_SHA1_MASK_ALGORITHM);
let salt_length = decoder
.context_specific(SALT_LENGTH_TAG)?
.map(TryInto::try_into)
.transpose()?
.unwrap_or(20);
Ok(Self {
hash_algorithm,
mask_gen_algorithm,
salt_length,
})
})
}
}
// The parameters field associated with OID id-RSAES-OAEP
// Defined in RFC 3447, section A.2.1
//
// RSAES-OAEP-params ::= SEQUENCE {
// hashAlgorithm [0] HashAlgorithm DEFAULT sha1,
// maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1,
// pSourceAlgorithm [2] PSourceAlgorithm DEFAULT pSpecifiedEmpty
// }
pub struct OaepPrivateKeyParameters<'a> {
pub hash_algorithm: rsa::pkcs8::AlgorithmIdentifier<'a>,
pub mask_gen_algorithm: rsa::pkcs8::AlgorithmIdentifier<'a>,
pub p_source_algorithm: rsa::pkcs8::AlgorithmIdentifier<'a>,
}
impl<'a> TryFrom<rsa::pkcs8::der::asn1::Any<'a>>
for OaepPrivateKeyParameters<'a>
{
type Error = rsa::pkcs8::der::Error;
fn try_from(
any: rsa::pkcs8::der::asn1::Any<'a>,
) -> rsa::pkcs8::der::Result<OaepPrivateKeyParameters> {
any.sequence(|decoder| {
let hash_algorithm = decoder
.context_specific(HASH_ALGORITHM_TAG)?
.map(TryInto::try_into)
.transpose()?
.unwrap_or(*SHA1_HASH_ALGORITHM);
let mask_gen_algorithm = decoder
.context_specific(MASK_GEN_ALGORITHM_TAG)?
.map(TryInto::try_into)
.transpose()?
.unwrap_or(*MGF1_SHA1_MASK_ALGORITHM);
let p_source_algorithm = decoder
.context_specific(P_SOURCE_ALGORITHM_TAG)?
.map(TryInto::try_into)
.transpose()?
.unwrap_or(*P_SPECIFIED_EMPTY);
Ok(Self {
hash_algorithm,
mask_gen_algorithm,
p_source_algorithm,
})
})
}
}
#[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("DOMExceptionOperationError", 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(type_error("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("DOMExceptionOperationError", e.to_string()),
)?;
let bytes_consumed = private_key.encoded_len().map_err(|e| {
custom_error("DOMExceptionDataError", e.to_string())
})?;
if bytes_consumed
!= rsa::pkcs1::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),
})
}
// TODO(@littledivy): spki
// 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("DOMExceptionOperationError", 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(),
));
}
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("DOMExceptionOperationError", e.to_string()),
)?;
let bytes_consumed = private_key
.encoded_len()
.map_err(|e| custom_error("DataError", e.to_string()))?;
if bytes_consumed
!= rsa::pkcs1::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),
})
}
// TODO(@littledivy): spki
// 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("DOMExceptionOperationError", 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(),
));
}
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("DOMExceptionOperationError", e.to_string()),
)?;
let bytes_consumed = private_key.encoded_len().map_err(|e| {
custom_error("DOMExceptionDataError", e.to_string())
})?;
if bytes_consumed
!= rsa::pkcs1::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),
})
}
// TODO(@littledivy): spki
// 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 {
key: KeyData,
algorithm: Algorithm,
// RSA-OAEP
hash: Option<CryptoHash>,
label: Option<ZeroCopyBuf>,
// AES-CBC
iv: Option<ZeroCopyBuf>,
length: Option<usize>,
}
pub async fn op_crypto_decrypt_key(
_state: Rc<RefCell<OpState>>,
args: DecryptArg,
zero_copy: ZeroCopyBuf,
) -> Result<ZeroCopyBuf, AnyError> {
let data = &*zero_copy;
let algorithm = args.algorithm;
match algorithm {
Algorithm::RsaOaep => {
let private_key: RsaPrivateKey =
RsaPrivateKey::from_pkcs1_der(&*args.key.data)?;
let label = args.label.map(|l| String::from_utf8_lossy(&*l).to_string());
let padding = match args
.hash
.ok_or_else(|| type_error("Missing argument hash".to_string()))?
{
CryptoHash::Sha1 => PaddingScheme::OAEP {
digest: Box::new(Sha1::new()),
mgf_digest: Box::new(Sha1::new()),
label,
},
CryptoHash::Sha256 => PaddingScheme::OAEP {
digest: Box::new(Sha256::new()),
mgf_digest: Box::new(Sha256::new()),
label,
},
CryptoHash::Sha384 => PaddingScheme::OAEP {
digest: Box::new(Sha384::new()),
mgf_digest: Box::new(Sha384::new()),
label,
},
CryptoHash::Sha512 => PaddingScheme::OAEP {
digest: Box::new(Sha512::new()),
mgf_digest: Box::new(Sha512::new()),
label,
},
};
Ok(
private_key
.decrypt(padding, data)
.map_err(|e| {
custom_error("DOMExceptionOperationError", e.to_string())
})?
.into(),
)
}
Algorithm::AesCbc => {
let key = &*args.key.data;
let length = args
.length
.ok_or_else(|| type_error("Missing argument length".to_string()))?;
let iv = args
.iv
.ok_or_else(|| type_error("Missing argument iv".to_string()))?;
// 2.
let plaintext = match length {
128 => {
// Section 10.3 Step 2 of RFC 2315 https://www.rfc-editor.org/rfc/rfc2315
type Aes128Cbc =
block_modes::Cbc<aes::Aes128, block_modes::block_padding::Pkcs7>;
let cipher = Aes128Cbc::new_from_slices(key, &iv)?;
cipher.decrypt_vec(data)?
}
192 => {
// Section 10.3 Step 2 of RFC 2315 https://www.rfc-editor.org/rfc/rfc2315
type Aes192Cbc =
block_modes::Cbc<aes::Aes192, block_modes::block_padding::Pkcs7>;
let cipher = Aes192Cbc::new_from_slices(key, &iv)?;
cipher.decrypt_vec(data)?
}
256 => {
// Section 10.3 Step 2 of RFC 2315 https://www.rfc-editor.org/rfc/rfc2315
type Aes256Cbc =
block_modes::Cbc<aes::Aes256, block_modes::block_padding::Pkcs7>;
let cipher = Aes256Cbc::new_from_slices(key, &iv)?;
cipher.decrypt_vec(data)?
}
_ => unreachable!(),
};
// 6.
Ok(plaintext.into())
}
_ => Err(type_error("Unsupported algorithm".to_string())),
}
}
pub fn op_crypto_random_uuid(
state: &mut OpState,
_: (),
_: (),
) -> Result<String, AnyError> {
let maybe_seeded_rng = state.try_borrow_mut::<StdRng>();
let uuid = if let Some(seeded_rng) = maybe_seeded_rng {
let mut bytes = [0u8; 16];
seeded_rng.fill(&mut bytes);
uuid::Builder::from_bytes(bytes)
.set_version(uuid::Version::Random)
.build()
} else {
uuid::Uuid::new_v4()
};
Ok(uuid.to_string())
}
pub async fn op_crypto_subtle_digest(
_state: Rc<RefCell<OpState>>,
algorithm: CryptoHash,
data: ZeroCopyBuf,
) -> Result<ZeroCopyBuf, AnyError> {
let output = tokio::task::spawn_blocking(move || {
digest::digest(algorithm.into(), &data)
.as_ref()
.to_vec()
.into()
})
.await?;
Ok(output)
}
pub fn get_declaration() -> PathBuf {
PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_crypto.d.ts")
}
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