Add implementation of Camellia #293

sorairolake · 2021-12-11T20:42:51Z

This is implemented based on RFC 3713 and refer to Botan.
Test vectors are from NESSIE, and tested on all three key sizes of Camellia.

This partially solves #1.

newpavlov · 2021-12-18T10:29:42Z

Thank you for the PR! I will try review it after finishing #284.

sorairolake · 2021-12-26T11:49:03Z

@newpavlov OK.

tarcieri · 2022-01-13T15:02:22Z

@sorairolake sorry we haven't had time to review this. Lots of other things going on and I am not particularly familiar with this cipher.

Also curious why you marked it a draft... are you planning on doing more work on it?

sorairolake · 2022-01-13T15:18:43Z

@tarcieri Should I move this PR to cipher v0.4?
If not, I unmark it a draft.

tarcieri · 2022-01-13T15:30:10Z

Aah. Yeah let's circle back after cipher v0.4 is released

newpavlov · 2022-02-16T05:43:18Z

@sorairolake
Can you please update this PR to cipher v0.4?

sorairolake · 2022-03-20T04:22:16Z

@tarcieri Migrated to cipher v0.4, so I unmarked it a draft.

@newpavlov Could you review this?

tarcieri · 2022-03-27T15:18:38Z

camellia/src/camellia.rs

+        #[doc = $doc]
+        #[derive(Clone)]
+        pub struct $name {
+            /// Subkeys for key whitening.
+            kw: [u64; 4],
+            /// Round keys.
+            k: [u64; $rounds],
+            /// Subkeys for a logical transformation layer.
+            ke: [u64; $rounds / 3 - 2],
+        }
+
+        impl BlockCipher for $name {}
+
+        impl KeySizeUser for $name {
+            type KeySize = $key_size;
+        }
+
+        impl fmt::Debug for $name {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                f.write_str(concat!(stringify!($name), " { ... }"))
+            }
+        }
+
+        impl AlgorithmName for $name {
+            fn write_alg_name(f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                f.write_str(concat!(stringify!($name)))
+            }
+        }
+
+        #[cfg(feature = "zeroize")]
+        #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))]
+        impl Drop for $name {
+            fn drop(&mut self){
+                self.kw.zeroize();
+                self.k.zeroize();
+                self.ke.zeroize();
+            }
+        }
+
+        #[cfg(feature = "zeroize")]
+        #[cfg_attr(docsrs, doc(cfg(feature = "zeroize")))]
+        impl ZeroizeOnDrop for $name {}
+
+        cipher::impl_simple_block_encdec!(
+            $name, U16, cipher, block,
+            encrypt: {
+                let b = block.get_in();
+                let mut d1 = u64::from_be_bytes(b[0..8].try_into().unwrap());
+                let mut d2 = u64::from_be_bytes(b[8..16].try_into().unwrap());
+
+                d1 ^= cipher.kw[0];
+                d2 ^= cipher.kw[1];
+
+                d2 ^= f(d1, cipher.k[0]);
+                d1 ^= f(d2, cipher.k[1]);
+                for round in (2..$rounds).step_by(2) {
+                    if round % 6 == 0 {
+                        d1 = fl(d1, cipher.ke[round / 3 - 2]);
+                        d2 = flinv(d2, cipher.ke[round / 3 - 1]);
+                    }
+                    d2 ^= f(d1, cipher.k[round]);
+                    d1 ^= f(d2, cipher.k[round + 1]);
+                }
+
+                d2 ^= cipher.kw[2];
+                d1 ^= cipher.kw[3];
+
+                BE::write_u64_into(&[d2, d1], block.get_out());
+            }
+            decrypt: {
+                let b = block.get_in();
+                let mut d1 = u64::from_be_bytes(b[0..8].try_into().unwrap());
+                let mut d2 = u64::from_be_bytes(b[8..16].try_into().unwrap());
+
+                d2 ^= cipher.kw[3];
+                d1 ^= cipher.kw[2];
+
+                d2 ^= f(d1, cipher.k[$rounds - 1]);
+                d1 ^= f(d2, cipher.k[$rounds - 2]);
+                for round in (0..$rounds - 2).rev().step_by(2) {
+                    if (round + 1) % 6 == 0 {
+                        d1 = fl(d1, cipher.ke[round / 3]);
+                        d2 = flinv(d2, cipher.ke[round / 3 - 1]);
+                    }
+                    d2 ^= f(d1, cipher.k[round]);
+                    d1 ^= f(d2, cipher.k[round - 1]);
+                }
+
+                d1 ^= cipher.kw[1];
+                d2 ^= cipher.kw[0];
+
+                BE::write_u64_into(&[d2, d1], block.get_out());
+            }
+        );
+    };
+}
+
+impl_camellia!(Camellia128, 18, U16, "Camellia-128 block cipher instance.");
+impl_camellia!(Camellia192, 24, U24, "Camellia-192 block cipher instance.");
+impl_camellia!(Camellia256, 24, U32, "Camellia-256 block cipher instance.");


It seems like this could be impl'd in terms of a generic core type with (const) generic parameters and type aliases for the specific key sizes, rather than using macros.

Likewise it seems like gen_subkeys! could potentially be a function (or rather, two functions) rather than macros.

gen_subkeys! has been fixed.

tarcieri · 2022-03-27T15:20:12Z

camellia/src/consts.rs

+pub const SBOXES: [[u8; 256]; 4] = [
+    // SBOX1
+    [
+        0x70, 0x82, 0x2c, 0xec, 0xb3, 0x27, 0xc0, 0xe5, 0xe4, 0x85, 0x57, 0x35, 0xea, 0x0c, 0xae,
+        0x41, 0x23, 0xef, 0x6b, 0x93, 0x45, 0x19, 0xa5, 0x21, 0xed, 0x0e, 0x4f, 0x4e, 0x1d, 0x65,
+        0x92, 0xbd, 0x86, 0xb8, 0xaf, 0x8f, 0x7c, 0xeb, 0x1f, 0xce, 0x3e, 0x30, 0xdc, 0x5f, 0x5e,
+        0xc5, 0x0b, 0x1a, 0xa6, 0xe1, 0x39, 0xca, 0xd5, 0x47, 0x5d, 0x3d, 0xd9, 0x01, 0x5a, 0xd6,
+        0x51, 0x56, 0x6c, 0x4d, 0x8b, 0x0d, 0x9a, 0x66, 0xfb, 0xcc, 0xb0, 0x2d, 0x74, 0x12, 0x2b,
+        0x20, 0xf0, 0xb1, 0x84, 0x99, 0xdf, 0x4c, 0xcb, 0xc2, 0x34, 0x7e, 0x76, 0x05, 0x6d, 0xb7,
+        0xa9, 0x31, 0xd1, 0x17, 0x04, 0xd7, 0x14, 0x58, 0x3a, 0x61, 0xde, 0x1b, 0x11, 0x1c, 0x32,
+        0x0f, 0x9c, 0x16, 0x53, 0x18, 0xf2, 0x22, 0xfe, 0x44, 0xcf, 0xb2, 0xc3, 0xb5, 0x7a, 0x91,
+        0x24, 0x08, 0xe8, 0xa8, 0x60, 0xfc, 0x69, 0x50, 0xaa, 0xd0, 0xa0, 0x7d, 0xa1, 0x89, 0x62,
+        0x97, 0x54, 0x5b, 0x1e, 0x95, 0xe0, 0xff, 0x64, 0xd2, 0x10, 0xc4, 0x00, 0x48, 0xa3, 0xf7,
+        0x75, 0xdb, 0x8a, 0x03, 0xe6, 0xda, 0x09, 0x3f, 0xdd, 0x94, 0x87, 0x5c, 0x83, 0x02, 0xcd,
+        0x4a, 0x90, 0x33, 0x73, 0x67, 0xf6, 0xf3, 0x9d, 0x7f, 0xbf, 0xe2, 0x52, 0x9b, 0xd8, 0x26,
+        0xc8, 0x37, 0xc6, 0x3b, 0x81, 0x96, 0x6f, 0x4b, 0x13, 0xbe, 0x63, 0x2e, 0xe9, 0x79, 0xa7,
+        0x8c, 0x9f, 0x6e, 0xbc, 0x8e, 0x29, 0xf5, 0xf9, 0xb6, 0x2f, 0xfd, 0xb4, 0x59, 0x78, 0x98,
+        0x06, 0x6a, 0xe7, 0x46, 0x71, 0xba, 0xd4, 0x25, 0xab, 0x42, 0x88, 0xa2, 0x8d, 0xfa, 0x72,
+        0x07, 0xb9, 0x55, 0xf8, 0xee, 0xac, 0x0a, 0x36, 0x49, 0x2a, 0x68, 0x3c, 0x38, 0xf1, 0xa4,
+        0x40, 0x28, 0xd3, 0x7b, 0xbb, 0xc9, 0x43, 0xc1, 0x15, 0xe3, 0xad, 0xf4, 0x77, 0xc7, 0x80,
+        0x9e,
+    ],
+    // SBOX2
+    [
+        0xe0, 0x05, 0x58, 0xd9, 0x67, 0x4e, 0x81, 0xcb, 0xc9, 0x0b, 0xae, 0x6a, 0xd5, 0x18, 0x5d,
+        0x82, 0x46, 0xdf, 0xd6, 0x27, 0x8a, 0x32, 0x4b, 0x42, 0xdb, 0x1c, 0x9e, 0x9c, 0x3a, 0xca,
+        0x25, 0x7b, 0x0d, 0x71, 0x5f, 0x1f, 0xf8, 0xd7, 0x3e, 0x9d, 0x7c, 0x60, 0xb9, 0xbe, 0xbc,
+        0x8b, 0x16, 0x34, 0x4d, 0xc3, 0x72, 0x95, 0xab, 0x8e, 0xba, 0x7a, 0xb3, 0x02, 0xb4, 0xad,
+        0xa2, 0xac, 0xd8, 0x9a, 0x17, 0x1a, 0x35, 0xcc, 0xf7, 0x99, 0x61, 0x5a, 0xe8, 0x24, 0x56,
+        0x40, 0xe1, 0x63, 0x09, 0x33, 0xbf, 0x98, 0x97, 0x85, 0x68, 0xfc, 0xec, 0x0a, 0xda, 0x6f,
+        0x53, 0x62, 0xa3, 0x2e, 0x08, 0xaf, 0x28, 0xb0, 0x74, 0xc2, 0xbd, 0x36, 0x22, 0x38, 0x64,
+        0x1e, 0x39, 0x2c, 0xa6, 0x30, 0xe5, 0x44, 0xfd, 0x88, 0x9f, 0x65, 0x87, 0x6b, 0xf4, 0x23,
+        0x48, 0x10, 0xd1, 0x51, 0xc0, 0xf9, 0xd2, 0xa0, 0x55, 0xa1, 0x41, 0xfa, 0x43, 0x13, 0xc4,
+        0x2f, 0xa8, 0xb6, 0x3c, 0x2b, 0xc1, 0xff, 0xc8, 0xa5, 0x20, 0x89, 0x00, 0x90, 0x47, 0xef,
+        0xea, 0xb7, 0x15, 0x06, 0xcd, 0xb5, 0x12, 0x7e, 0xbb, 0x29, 0x0f, 0xb8, 0x07, 0x04, 0x9b,
+        0x94, 0x21, 0x66, 0xe6, 0xce, 0xed, 0xe7, 0x3b, 0xfe, 0x7f, 0xc5, 0xa4, 0x37, 0xb1, 0x4c,
+        0x91, 0x6e, 0x8d, 0x76, 0x03, 0x2d, 0xde, 0x96, 0x26, 0x7d, 0xc6, 0x5c, 0xd3, 0xf2, 0x4f,
+        0x19, 0x3f, 0xdc, 0x79, 0x1d, 0x52, 0xeb, 0xf3, 0x6d, 0x5e, 0xfb, 0x69, 0xb2, 0xf0, 0x31,
+        0x0c, 0xd4, 0xcf, 0x8c, 0xe2, 0x75, 0xa9, 0x4a, 0x57, 0x84, 0x11, 0x45, 0x1b, 0xf5, 0xe4,
+        0x0e, 0x73, 0xaa, 0xf1, 0xdd, 0x59, 0x14, 0x6c, 0x92, 0x54, 0xd0, 0x78, 0x70, 0xe3, 0x49,
+        0x80, 0x50, 0xa7, 0xf6, 0x77, 0x93, 0x86, 0x83, 0x2a, 0xc7, 0x5b, 0xe9, 0xee, 0x8f, 0x01,
+        0x3d,
+    ],
+    // SBOX3
+    [
+        0x38, 0x41, 0x16, 0x76, 0xd9, 0x93, 0x60, 0xf2, 0x72, 0xc2, 0xab, 0x9a, 0x75, 0x06, 0x57,
+        0xa0, 0x91, 0xf7, 0xb5, 0xc9, 0xa2, 0x8c, 0xd2, 0x90, 0xf6, 0x07, 0xa7, 0x27, 0x8e, 0xb2,
+        0x49, 0xde, 0x43, 0x5c, 0xd7, 0xc7, 0x3e, 0xf5, 0x8f, 0x67, 0x1f, 0x18, 0x6e, 0xaf, 0x2f,
+        0xe2, 0x85, 0x0d, 0x53, 0xf0, 0x9c, 0x65, 0xea, 0xa3, 0xae, 0x9e, 0xec, 0x80, 0x2d, 0x6b,
+        0xa8, 0x2b, 0x36, 0xa6, 0xc5, 0x86, 0x4d, 0x33, 0xfd, 0x66, 0x58, 0x96, 0x3a, 0x09, 0x95,
+        0x10, 0x78, 0xd8, 0x42, 0xcc, 0xef, 0x26, 0xe5, 0x61, 0x1a, 0x3f, 0x3b, 0x82, 0xb6, 0xdb,
+        0xd4, 0x98, 0xe8, 0x8b, 0x02, 0xeb, 0x0a, 0x2c, 0x1d, 0xb0, 0x6f, 0x8d, 0x88, 0x0e, 0x19,
+        0x87, 0x4e, 0x0b, 0xa9, 0x0c, 0x79, 0x11, 0x7f, 0x22, 0xe7, 0x59, 0xe1, 0xda, 0x3d, 0xc8,
+        0x12, 0x04, 0x74, 0x54, 0x30, 0x7e, 0xb4, 0x28, 0x55, 0x68, 0x50, 0xbe, 0xd0, 0xc4, 0x31,
+        0xcb, 0x2a, 0xad, 0x0f, 0xca, 0x70, 0xff, 0x32, 0x69, 0x08, 0x62, 0x00, 0x24, 0xd1, 0xfb,
+        0xba, 0xed, 0x45, 0x81, 0x73, 0x6d, 0x84, 0x9f, 0xee, 0x4a, 0xc3, 0x2e, 0xc1, 0x01, 0xe6,
+        0x25, 0x48, 0x99, 0xb9, 0xb3, 0x7b, 0xf9, 0xce, 0xbf, 0xdf, 0x71, 0x29, 0xcd, 0x6c, 0x13,
+        0x64, 0x9b, 0x63, 0x9d, 0xc0, 0x4b, 0xb7, 0xa5, 0x89, 0x5f, 0xb1, 0x17, 0xf4, 0xbc, 0xd3,
+        0x46, 0xcf, 0x37, 0x5e, 0x47, 0x94, 0xfa, 0xfc, 0x5b, 0x97, 0xfe, 0x5a, 0xac, 0x3c, 0x4c,
+        0x03, 0x35, 0xf3, 0x23, 0xb8, 0x5d, 0x6a, 0x92, 0xd5, 0x21, 0x44, 0x51, 0xc6, 0x7d, 0x39,
+        0x83, 0xdc, 0xaa, 0x7c, 0x77, 0x56, 0x05, 0x1b, 0xa4, 0x15, 0x34, 0x1e, 0x1c, 0xf8, 0x52,
+        0x20, 0x14, 0xe9, 0xbd, 0xdd, 0xe4, 0xa1, 0xe0, 0x8a, 0xf1, 0xd6, 0x7a, 0xbb, 0xe3, 0x40,
+        0x4f,
+    ],
+    // SBOX4
+    [
+        0x70, 0x2c, 0xb3, 0xc0, 0xe4, 0x57, 0xea, 0xae, 0x23, 0x6b, 0x45, 0xa5, 0xed, 0x4f, 0x1d,
+        0x92, 0x86, 0xaf, 0x7c, 0x1f, 0x3e, 0xdc, 0x5e, 0x0b, 0xa6, 0x39, 0xd5, 0x5d, 0xd9, 0x5a,
+        0x51, 0x6c, 0x8b, 0x9a, 0xfb, 0xb0, 0x74, 0x2b, 0xf0, 0x84, 0xdf, 0xcb, 0x34, 0x76, 0x6d,
+        0xa9, 0xd1, 0x04, 0x14, 0x3a, 0xde, 0x11, 0x32, 0x9c, 0x53, 0xf2, 0xfe, 0xcf, 0xc3, 0x7a,
+        0x24, 0xe8, 0x60, 0x69, 0xaa, 0xa0, 0xa1, 0x62, 0x54, 0x1e, 0xe0, 0x64, 0x10, 0x00, 0xa3,
+        0x75, 0x8a, 0xe6, 0x09, 0xdd, 0x87, 0x83, 0xcd, 0x90, 0x73, 0xf6, 0x9d, 0xbf, 0x52, 0xd8,
+        0xc8, 0xc6, 0x81, 0x6f, 0x13, 0x63, 0xe9, 0xa7, 0x9f, 0xbc, 0x29, 0xf9, 0x2f, 0xb4, 0x78,
+        0x06, 0xe7, 0x71, 0xd4, 0xab, 0x88, 0x8d, 0x72, 0xb9, 0xf8, 0xac, 0x36, 0x2a, 0x3c, 0xf1,
+        0x40, 0xd3, 0xbb, 0x43, 0x15, 0xad, 0x77, 0x80, 0x82, 0xec, 0x27, 0xe5, 0x85, 0x35, 0x0c,
+        0x41, 0xef, 0x93, 0x19, 0x21, 0x0e, 0x4e, 0x65, 0xbd, 0xb8, 0x8f, 0xeb, 0xce, 0x30, 0x5f,
+        0xc5, 0x1a, 0xe1, 0xca, 0x47, 0x3d, 0x01, 0xd6, 0x56, 0x4d, 0x0d, 0x66, 0xcc, 0x2d, 0x12,
+        0x20, 0xb1, 0x99, 0x4c, 0xc2, 0x7e, 0x05, 0xb7, 0x31, 0x17, 0xd7, 0x58, 0x61, 0x1b, 0x1c,
+        0x0f, 0x16, 0x18, 0x22, 0x44, 0xb2, 0xb5, 0x91, 0x08, 0xa8, 0xfc, 0x50, 0xd0, 0x7d, 0x89,
+        0x97, 0x5b, 0x95, 0xff, 0xd2, 0xc4, 0x48, 0xf7, 0xdb, 0x03, 0xda, 0x3f, 0x94, 0x5c, 0x02,
+        0x4a, 0x33, 0x67, 0xf3, 0x7f, 0xe2, 0x9b, 0x26, 0x37, 0x3b, 0x96, 0x4b, 0xbe, 0x2e, 0x79,
+        0x8c, 0x6e, 0x8e, 0xf5, 0xb6, 0xfd, 0x59, 0x98, 0x6a, 0x46, 0xba, 0x25, 0x42, 0xa2, 0xfa,
+        0x07, 0x55, 0xee, 0x0a, 0x49, 0x68, 0x38, 0xa4, 0x28, 0x7b, 0xc9, 0xc1, 0xe3, 0xf4, 0xc7,
+        0x9e,
+    ],
+];


Since this is using lookup tables rather than bitslicing, it would probably be good to change the security warning language in README.md to note that it is NOT constant time because it's using LUTs.

tarcieri · 2022-03-27T15:21:03Z

Left a few notes. I think this is generally fine but this is not a cipher I'm particularly familiar with so take my review with a grain of salt.

tarcieri · 2022-04-09T23:32:08Z

Going to go ahead and merge this. I think it's acceptable as an initial spike.

I can follow-up on some of my other comments.

sorairolake · 2022-09-26T12:42:21Z

@newpavlov When will this be released?

newpavlov · 2022-09-26T15:14:03Z

Oh, sorry. I haven't done the release for some reason after the merge... I will do it right away.

sorairolake force-pushed the feature/camellia branch 8 times, most recently from 8b4b032 to 9e332fc Compare December 15, 2021 17:51

sorairolake mentioned this pull request Dec 15, 2021

Missing block ciphers #1

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sorairolake marked this pull request as ready for review March 8, 2022 03:21

tarcieri reviewed Mar 27, 2022

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Add implementation of Camellia

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sorairolake force-pushed the feature/camellia branch from ae34253 to f730dc4 Compare April 8, 2022 08:00

tarcieri merged commit 2314013 into RustCrypto:master Apr 9, 2022

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sorairolake mentioned this pull request Apr 10, 2022

Fix missing space before curly brace #313

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sorairolake mentioned this pull request Nov 7, 2022

Add missing symmetric cipher support rpgp/rpgp#197

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