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Merge pull request #864 from mlen/aes-ccm-bindings 

Implement AES-{128,256}-CCM bindings
This commit is contained in:
Steven Fackler 2018-03-11 16:30:37 -07:00 committed by GitHub
parent 170adae336 cefad46cf5
commit 9452c01672
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 181 additions and 4 deletions
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2
openssl-sys/src/lib.rs
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@ -1954,6 +1954,7 @@ extern "C" {
pub fn EVP_aes_128_xts() -> *const EVP_CIPHER;
pub fn EVP_aes_128_ctr() -> *const EVP_CIPHER;
pub fn EVP_aes_128_gcm() -> *const EVP_CIPHER;
pub fn EVP_aes_128_ccm() -> *const EVP_CIPHER;
pub fn EVP_aes_128_cfb1() -> *const EVP_CIPHER;
pub fn EVP_aes_128_cfb128() -> *const EVP_CIPHER;
pub fn EVP_aes_128_cfb8() -> *const EVP_CIPHER;
@ -1962,6 +1963,7 @@ extern "C" {
pub fn EVP_aes_256_xts() -> *const EVP_CIPHER;
pub fn EVP_aes_256_ctr() -> *const EVP_CIPHER;
pub fn EVP_aes_256_gcm() -> *const EVP_CIPHER;
pub fn EVP_aes_256_ccm() -> *const EVP_CIPHER;
pub fn EVP_aes_256_cfb1() -> *const EVP_CIPHER;
pub fn EVP_aes_256_cfb128() -> *const EVP_CIPHER;
pub fn EVP_aes_256_cfb8() -> *const EVP_CIPHER;

178
openssl/src/symm.rs
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@ -71,7 +71,7 @@ pub enum Mode {
/// See OpenSSL doc at [`EVP_EncryptInit`] for more information on each algorithms.
///
/// [`EVP_EncryptInit`]: https://www.openssl.org/docs/man1.1.0/crypto/EVP_EncryptInit.html
#[derive(Copy, Clone)]
#[derive(Copy, Clone, PartialEq, Eq)]
pub struct Cipher(*const ffi::EVP_CIPHER);
impl Cipher {
@ -107,6 +107,10 @@ impl Cipher {
unsafe { Cipher(ffi::EVP_aes_128_gcm()) }
}
pub fn aes_128_ccm() -> Cipher {
unsafe { Cipher(ffi::EVP_aes_128_ccm()) }
}
pub fn aes_256_ecb() -> Cipher {
unsafe { Cipher(ffi::EVP_aes_256_ecb()) }
}
@ -139,6 +143,10 @@ impl Cipher {
unsafe { Cipher(ffi::EVP_aes_256_gcm()) }
}
pub fn aes_256_ccm() -> Cipher {
unsafe { Cipher(ffi::EVP_aes_256_ccm()) }
}
pub fn bf_cbc() -> Cipher {
unsafe { Cipher(ffi::EVP_bf_cbc()) }
}
@ -221,6 +229,12 @@ impl Cipher {
pub fn block_size(&self) -> usize {
unsafe { EVP_CIPHER_block_size(self.0) as usize }
}
/// Determines whether the cipher is using CCM mode
fn is_ccm(&self) -> bool {
// NOTE: OpenSSL returns pointers to static structs, which makes this work as expected
*self == Cipher::aes_128_ccm() || *self == Cipher::aes_256_ccm()
}
}
unsafe impl Sync for Cipher {}
@ -393,6 +407,41 @@ impl Crypter {
}
}
/// Sets the length of the authentication tag to generate in AES CCM.
///
/// When encrypting with AES CCM, the tag length needs to be explicitly set in order
/// to use a value different than the default 12 bytes.
pub fn set_tag_len(&mut self, tag_len: usize) -> Result<(), ErrorStack> {
unsafe {
assert!(tag_len <= c_int::max_value() as usize);
// NB: this constant is actually more general than just GCM.
cvt(ffi::EVP_CIPHER_CTX_ctrl(
self.ctx,
ffi::EVP_CTRL_GCM_SET_TAG,
tag_len as c_int,
ptr::null_mut(),
)).map(|_| ())
}
}
/// Feeds total plaintext length to the cipher.
///
/// The total plaintext or ciphertext length MUST be passed to the cipher when it operates in
/// CCM mode.
pub fn set_data_len(&mut self, data_len: usize)-> Result<(), ErrorStack> {
unsafe {
assert!(data_len <= c_int::max_value() as usize);
let mut len = 0;
cvt(ffi::EVP_CipherUpdate(
self.ctx,
ptr::null_mut(),
&mut len,
ptr::null_mut(),
data_len as c_int,
)).map(|_| ())
}
}
/// Feeds Additional Authenticated Data (AAD) through the cipher.
///
/// This can only be used with AEAD ciphers such as AES GCM. Data fed in is not encrypted, but
@ -607,6 +656,12 @@ pub fn encrypt_aead(
) -> Result<Vec<u8>, ErrorStack> {
let mut c = Crypter::new(t, Mode::Encrypt, key, iv)?;
let mut out = vec![0; data.len() + t.block_size()];
if t.is_ccm() {
c.set_tag_len(tag.len())?;
c.set_data_len(data.len())?;
}
c.aad_update(aad)?;
let count = c.update(data, &mut out)?;
let rest = c.finalize(&mut out[count..])?;
@ -629,10 +684,21 @@ pub fn decrypt_aead(
) -> Result<Vec<u8>, ErrorStack> {
let mut c = Crypter::new(t, Mode::Decrypt, key, iv)?;
let mut out = vec![0; data.len() + t.block_size()];
if t.is_ccm() {
c.set_tag(tag)?;
c.set_data_len(data.len())?;
}
c.aad_update(aad)?;
let count = c.update(data, &mut out)?;
let mut rest = 0;
if !t.is_ccm() {
c.set_tag(tag)?;
let rest = c.finalize(&mut out[count..])?;
rest = c.finalize(&mut out[count..])?;
}
out.truncate(count + rest);
Ok(out)
}
@ -1017,6 +1083,114 @@ mod tests {
assert_eq!(pt, hex::encode(out));
}
#[test]
fn test_aes128_ccm() {
let key = "3ee186594f110fb788a8bf8aa8be5d4a";
let nonce = "44f705d52acf27b7f17196aa9b";
let aad = "2c16724296ff85e079627be3053ea95adf35722c21886baba343bd6c79b5cb57";
let pt = "d71864877f2578db092daba2d6a1f9f4698a9c356c7830a1";
let ct = "b4dd74e7a0cc51aea45dfb401a41d5822c96901a83247ea0";
let tag = "d6965f5aa6e31302a9cc2b36";
let mut actual_tag = [0; 12];
let out = encrypt_aead(
Cipher::aes_128_ccm(),
&Vec::from_hex(key).unwrap(),
Some(&Vec::from_hex(nonce).unwrap()),
&Vec::from_hex(aad).unwrap(),
&Vec::from_hex(pt).unwrap(),
&mut actual_tag,
).unwrap();
assert_eq!(ct, hex::encode(out));
assert_eq!(tag, hex::encode(actual_tag));
let out = decrypt_aead(
Cipher::aes_128_ccm(),
&Vec::from_hex(key).unwrap(),
Some(&Vec::from_hex(nonce).unwrap()),
&Vec::from_hex(aad).unwrap(),
&Vec::from_hex(ct).unwrap(),
&Vec::from_hex(tag).unwrap(),
).unwrap();
assert_eq!(pt, hex::encode(out));
}
#[test]
fn test_aes128_ccm_verify_fail() {
let key = "3ee186594f110fb788a8bf8aa8be5d4a";
let nonce = "44f705d52acf27b7f17196aa9b";
let aad = "2c16724296ff85e079627be3053ea95adf35722c21886baba343bd6c79b5cb57";
let ct = "b4dd74e7a0cc51aea45dfb401a41d5822c96901a83247ea0";
let tag = "00005f5aa6e31302a9cc2b36";
let out = decrypt_aead(
Cipher::aes_128_ccm(),
&Vec::from_hex(key).unwrap(),
Some(&Vec::from_hex(nonce).unwrap()),
&Vec::from_hex(aad).unwrap(),
&Vec::from_hex(ct).unwrap(),
&Vec::from_hex(tag).unwrap(),
);
assert!(out.is_err());
}
#[test]
fn test_aes256_ccm() {
let key = "7f4af6765cad1d511db07e33aaafd57646ec279db629048aa6770af24849aa0d";
let nonce = "dde2a362ce81b2b6913abc3095";
let aad = "404f5df97ece7431987bc098cce994fc3c063b519ffa47b0365226a0015ef695";
let pt = "7ebef26bf4ecf6f0ebb2eb860edbf900f27b75b4a6340fdb";
let ct = "353022db9c568bd7183a13c40b1ba30fcc768c54264aa2cd";
let tag = "2927a053c9244d3217a7ad05";
let mut actual_tag = [0; 12];
let out = encrypt_aead(
Cipher::aes_256_ccm(),
&Vec::from_hex(key).unwrap(),
Some(&Vec::from_hex(nonce).unwrap()),
&Vec::from_hex(aad).unwrap(),
&Vec::from_hex(pt).unwrap(),
&mut actual_tag,
).unwrap();
assert_eq!(ct, hex::encode(out));
assert_eq!(tag, hex::encode(actual_tag));
let out = decrypt_aead(
Cipher::aes_256_ccm(),
&Vec::from_hex(key).unwrap(),
Some(&Vec::from_hex(nonce).unwrap()),
&Vec::from_hex(aad).unwrap(),
&Vec::from_hex(ct).unwrap(),
&Vec::from_hex(tag).unwrap(),
).unwrap();
assert_eq!(pt, hex::encode(out));
}
#[test]
fn test_aes256_ccm_verify_fail() {
let key = "7f4af6765cad1d511db07e33aaafd57646ec279db629048aa6770af24849aa0d";
let nonce = "dde2a362ce81b2b6913abc3095";
let aad = "404f5df97ece7431987bc098cce994fc3c063b519ffa47b0365226a0015ef695";
let ct = "353022db9c568bd7183a13c40b1ba30fcc768c54264aa2cd";
let tag = "0000a053c9244d3217a7ad05";
let out = decrypt_aead(
Cipher::aes_256_ccm(),
&Vec::from_hex(key).unwrap(),
Some(&Vec::from_hex(nonce).unwrap()),
&Vec::from_hex(aad).unwrap(),
&Vec::from_hex(ct).unwrap(),
&Vec::from_hex(tag).unwrap(),
);
assert!(out.is_err());
}
#[test]
#[cfg(any(all(ossl110, feature = "v110"), all(ossl111, feature = "v111")))]
fn test_chacha20() {

3
systest/build.rs
View File

@ -59,7 +59,8 @@ fn main() {
.header("openssl/pkcs12.h")
.header("openssl/bn.h")
.header("openssl/aes.h")
.header("openssl/ocsp.h");
.header("openssl/ocsp.h")
.header("openssl/evp.h");
if !is_libressl {
cfg.header("openssl/cms.h");