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use deno_core::error::custom_error;
use deno_core::error::AnyError;
use deno_core::OpState;
use deno_core::ZeroCopyBuf;
use rsa::pkcs1::UIntBytes;
use serde::Deserialize;
use serde::Serialize;
use spki::der::asn1;
use spki::der::Decodable;
use spki::der::Encodable;
use crate::shared::*;
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ExportKeyOptions {
format: ExportKeyFormat,
#[serde(flatten)]
algorithm: ExportKeyAlgorithm,
}
#[derive(Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum ExportKeyFormat {
Pkcs8,
Spki,
JwkPublic,
JwkPrivate,
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase", tag = "algorithm")]
pub enum ExportKeyAlgorithm {
#[serde(rename = "RSASSA-PKCS1-v1_5")]
RsassaPkcs1v15 {},
#[serde(rename = "RSA-PSS")]
RsaPss {},
#[serde(rename = "RSA-OAEP")]
RsaOaep {},
}
#[derive(Serialize)]
#[serde(untagged)]
pub enum ExportKeyResult {
Pkcs8(ZeroCopyBuf),
Spki(ZeroCopyBuf),
JwkPublicRsa {
n: String,
e: String,
},
JwkPrivateRsa {
n: String,
e: String,
d: String,
p: String,
q: String,
dp: String,
dq: String,
qi: String,
},
}
pub fn op_crypto_export_key(
_state: &mut OpState,
opts: ExportKeyOptions,
key_data: RawKeyData,
) -> Result<ExportKeyResult, AnyError> {
match opts.algorithm {
ExportKeyAlgorithm::RsassaPkcs1v15 {}
| ExportKeyAlgorithm::RsaPss {}
| ExportKeyAlgorithm::RsaOaep {} => export_key_rsa(opts.format, key_data),
}
}
fn uint_to_b64(bytes: UIntBytes) -> String {
base64::encode_config(bytes.as_bytes(), base64::URL_SAFE_NO_PAD)
}
fn export_key_rsa(
format: ExportKeyFormat,
key_data: RawKeyData,
) -> Result<ExportKeyResult, deno_core::anyhow::Error> {
match format {
ExportKeyFormat::Spki => {
let subject_public_key = &key_data.as_rsa_public_key()?;
// 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 because we know the public key is valid.
let spki_der = key_info.to_vec().unwrap();
Ok(ExportKeyResult::Spki(spki_der.into()))
}
ExportKeyFormat::Pkcs8 => {
let private_key = key_data.as_rsa_private_key()?;
// 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,
};
// Infallible because we know the private key is valid.
let pkcs8_der = pk_info.to_vec().unwrap();
Ok(ExportKeyResult::Pkcs8(pkcs8_der.into()))
}
ExportKeyFormat::JwkPublic => {
let public_key = key_data.as_rsa_public_key()?;
let public_key = rsa::pkcs1::RsaPublicKey::from_der(&public_key)
.map_err(|_| {
custom_error(
"DOMExceptionOperationError",
"failed to decode public key",
)
})?;
Ok(ExportKeyResult::JwkPublicRsa {
n: uint_to_b64(public_key.modulus),
e: uint_to_b64(public_key.public_exponent),
})
}
ExportKeyFormat::JwkPrivate => {
let private_key = key_data.as_rsa_private_key()?;
let private_key = rsa::pkcs1::RsaPrivateKey::from_der(private_key)
.map_err(|_| {
custom_error(
"DOMExceptionOperationError",
"failed to decode private key",
)
})?;
Ok(ExportKeyResult::JwkPrivateRsa {
n: uint_to_b64(private_key.modulus),
e: uint_to_b64(private_key.public_exponent),
d: uint_to_b64(private_key.private_exponent),
p: uint_to_b64(private_key.prime1),
q: uint_to_b64(private_key.prime2),
dp: uint_to_b64(private_key.exponent1),
dq: uint_to_b64(private_key.exponent2),
qi: uint_to_b64(private_key.coefficient),
})
}
}
}
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