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crypto: Port over test_igvm_agent #3497
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ef6922f
crypto: Clean up aes-kwp
smalis-msft 3d9acf1
Port test_igvm_agent to crypto crate
smalis-msft c7715e5
backend
smalis-msft 87a73f8
tweak backend selection
smalis-msft f5c1d55
fmt
smalis-msft 233508a
openvmm on windows can use rust backend too
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| // Copyright (c) Microsoft Corporation. | ||
| // Licensed under the MIT License. | ||
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| //! AES key wrap with padding (RFC 5649) using the `aes-kw` RustCrypto crate. | ||
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| use super::AesKeyWrapError; | ||
| use aes_kw::KwpAes128; | ||
| use aes_kw::KwpAes192; | ||
| use aes_kw::KwpAes256; | ||
| use aes_kw::cipher::KeyInit; | ||
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| pub enum AesKeyWrapInner { | ||
| Aes128(KwpAes128), | ||
| Aes192(KwpAes192), | ||
| Aes256(KwpAes256), | ||
| } | ||
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| pub struct AesKeyWrapCtxInner<'a>(&'a AesKeyWrapInner); | ||
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| pub struct AesKeyUnwrapCtxInner<'a>(&'a AesKeyWrapInner); | ||
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| impl AesKeyWrapInner { | ||
| pub fn new(key: &[u8]) -> Result<Self, AesKeyWrapError> { | ||
| Ok(match key.len() { | ||
| 16 => Self::Aes128(KwpAes128::new_from_slice(key).unwrap()), | ||
| 24 => Self::Aes192(KwpAes192::new_from_slice(key).unwrap()), | ||
| 32 => Self::Aes256(KwpAes256::new_from_slice(key).unwrap()), | ||
|
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| n => return Err(AesKeyWrapError::InvalidKeySize(n)), | ||
| }) | ||
| } | ||
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| pub fn wrap_ctx(&self) -> Result<AesKeyWrapCtxInner<'_>, AesKeyWrapError> { | ||
| Ok(AesKeyWrapCtxInner(self)) | ||
| } | ||
|
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| pub fn unwrap_ctx(&self) -> Result<AesKeyUnwrapCtxInner<'_>, AesKeyWrapError> { | ||
| Ok(AesKeyUnwrapCtxInner(self)) | ||
| } | ||
| } | ||
|
|
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| fn err(e: aes_kw::Error, op: &'static str) -> AesKeyWrapError { | ||
| AesKeyWrapError::Backend(e.to_string(), op) | ||
| } | ||
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| impl AesKeyWrapCtxInner<'_> { | ||
| pub fn wrap(&mut self, payload: &[u8]) -> Result<Vec<u8>, AesKeyWrapError> { | ||
| let mut out = vec![0u8; payload.len() + 16]; | ||
| let written_len = match self.0 { | ||
| AesKeyWrapInner::Aes128(k) => k.wrap_key(payload, &mut out), | ||
| AesKeyWrapInner::Aes192(k) => k.wrap_key(payload, &mut out), | ||
| AesKeyWrapInner::Aes256(k) => k.wrap_key(payload, &mut out), | ||
| } | ||
| .map_err(|e| err(e, "wrapping key"))? | ||
| .len(); | ||
| out.truncate(written_len); | ||
| Ok(out) | ||
| } | ||
| } | ||
|
|
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| impl AesKeyUnwrapCtxInner<'_> { | ||
| pub fn unwrap(&mut self, wrapped_payload: &[u8]) -> Result<Vec<u8>, AesKeyWrapError> { | ||
| let mut out = vec![0u8; wrapped_payload.len() + 16]; | ||
| let written_len = match self.0 { | ||
| AesKeyWrapInner::Aes128(k) => k.unwrap_key(wrapped_payload, &mut out), | ||
| AesKeyWrapInner::Aes192(k) => k.unwrap_key(wrapped_payload, &mut out), | ||
| AesKeyWrapInner::Aes256(k) => k.unwrap_key(wrapped_payload, &mut out), | ||
| } | ||
| .map_err(|e| err(e, "unwrapping key"))? | ||
| .len(); | ||
| out.truncate(written_len); | ||
| Ok(out) | ||
| } | ||
| } | ||
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note to self: hide variants