Reorganized other crates

core/src/glwe/test_fft64/keyswitch.rs

@@ -1 +1,227 @@
+use backend::{FFT64, FillUniform, Module, ScratchOwned, Stats, VecZnxOps};
+use sampling::source::Source;
 
+use crate::{
+    FourierGLWESecret, GLWECiphertext, GLWEPlaintext, GLWESecret, GLWESwitchingKey, Infos, div_ceil,
+    noise::log2_std_noise_gglwe_product,
+};
+
+#[test]
+fn apply() {
+    let log_n: usize = 8;
+    let basek: usize = 12;
+    let k_in: usize = 45;
+    let digits: usize = div_ceil(k_in, basek);
+    (1..4).for_each(|rank_in| {
+        (1..4).for_each(|rank_out| {
+            (1..digits + 1).for_each(|di| {
+                let k_ksk: usize = k_in + basek * di;
+                let k_out: usize = k_ksk; // better capture noise
+                println!(
+                    "test keyswitch digits: {} rank_in: {} rank_out: {}",
+                    di, rank_in, rank_out
+                );
+                test_keyswitch(log_n, basek, k_out, k_in, k_ksk, di, rank_in, rank_out, 3.2);
+            })
+        });
+    });
+}
+
+#[test]
+fn apply_inplace() {
+    let log_n: usize = 8;
+    let basek: usize = 12;
+    let k_ct: usize = 45;
+    let digits: usize = div_ceil(k_ct, basek);
+    (1..4).for_each(|rank| {
+        (1..digits + 1).for_each(|di| {
+            let k_ksk: usize = k_ct + basek * di;
+            println!("test keyswitch_inplace digits: {} rank: {}", di, rank);
+            test_keyswitch_inplace(log_n, basek, k_ct, k_ksk, di, rank, 3.2);
+        });
+    });
+}
+
+fn test_keyswitch(
+    log_n: usize,
+    basek: usize,
+    k_out: usize,
+    k_in: usize,
+    k_ksk: usize,
+    digits: usize,
+    rank_in: usize,
+    rank_out: usize,
+    sigma: f64,
+) {
+    let module: Module<FFT64> = Module::<FFT64>::new(1 << log_n);
+
+    let rows: usize = div_ceil(k_in, basek * digits);
+
+    let mut ksk: GLWESwitchingKey<Vec<u8>, FFT64> =
+        GLWESwitchingKey::alloc(&module, basek, k_ksk, rows, digits, rank_in, rank_out);
+    let mut ct_in: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(&module, basek, k_in, rank_in);
+    let mut ct_out: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(&module, basek, k_out, rank_out);
+    let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(&module, basek, k_in);
+    let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(&module, basek, k_out);
+
+    let mut source_xs: Source = Source::new([0u8; 32]);
+    let mut source_xe: Source = Source::new([0u8; 32]);
+    let mut source_xa: Source = Source::new([0u8; 32]);
+
+    pt_want
+        .data
+        .fill_uniform(basek, 0, pt_want.size(), &mut source_xa);
+
+    let mut scratch: ScratchOwned = ScratchOwned::new(
+        GLWESwitchingKey::encrypt_sk_scratch_space(&module, basek, ksk.k(), rank_out)
+            | GLWECiphertext::decrypt_scratch_space(&module, basek, ct_out.k())
+            | GLWECiphertext::encrypt_sk_scratch_space(&module, basek, ct_in.k())
+            | GLWECiphertext::keyswitch_scratch_space(
+                &module,
+                basek,
+                ct_out.k(),
+                ct_in.k(),
+                ksk.k(),
+                digits,
+                rank_in,
+                rank_out,
+            ),
+    );
+
+    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(&module, rank_in);
+    sk_in.fill_ternary_prob(0.5, &mut source_xs);
+    let sk_in_dft: FourierGLWESecret<Vec<u8>, FFT64> = FourierGLWESecret::from(&module, &sk_in);
+
+    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(&module, rank_out);
+    sk_out.fill_ternary_prob(0.5, &mut source_xs);
+    let sk_out_dft: FourierGLWESecret<Vec<u8>, FFT64> = FourierGLWESecret::from(&module, &sk_out);
+
+    ksk.generate_from_sk(
+        &module,
+        &sk_in,
+        &sk_out_dft,
+        &mut source_xa,
+        &mut source_xe,
+        sigma,
+        scratch.borrow(),
+    );
+
+    ct_in.encrypt_sk(
+        &module,
+        &pt_want,
+        &sk_in_dft,
+        &mut source_xa,
+        &mut source_xe,
+        sigma,
+        scratch.borrow(),
+    );
+
+    ct_out.keyswitch(&module, &ct_in, &ksk, scratch.borrow());
+    ct_out.decrypt(&module, &mut pt_have, &sk_out_dft, scratch.borrow());
+
+    module.vec_znx_sub_ab_inplace(&mut pt_have.data, 0, &pt_want.data, 0);
+
+    let noise_have: f64 = pt_have.data.std(0, basek).log2();
+    let noise_want: f64 = log2_std_noise_gglwe_product(
+        module.n() as f64,
+        basek * digits,
+        0.5,
+        0.5,
+        0f64,
+        sigma * sigma,
+        0f64,
+        rank_in as f64,
+        k_in,
+        k_ksk,
+    );
+
+    println!("{} vs. {}", noise_have, noise_want);
+
+    assert!(
+        (noise_have - noise_want).abs() <= 0.5,
+        "{} {}",
+        noise_have,
+        noise_want
+    );
+}
+
+fn test_keyswitch_inplace(log_n: usize, basek: usize, k_ct: usize, k_ksk: usize, digits: usize, rank: usize, sigma: f64) {
+    let module: Module<FFT64> = Module::<FFT64>::new(1 << log_n);
+
+    let rows: usize = div_ceil(k_ct, basek * digits);
+
+    let mut ct_grlwe: GLWESwitchingKey<Vec<u8>, FFT64> = GLWESwitchingKey::alloc(&module, basek, k_ksk, rows, digits, rank, rank);
+    let mut ct_glwe: GLWECiphertext<Vec<u8>> = GLWECiphertext::alloc(&module, basek, k_ct, rank);
+    let mut pt_want: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(&module, basek, k_ct);
+    let mut pt_have: GLWEPlaintext<Vec<u8>> = GLWEPlaintext::alloc(&module, basek, k_ct);
+
+    let mut source_xs: Source = Source::new([0u8; 32]);
+    let mut source_xe: Source = Source::new([0u8; 32]);
+    let mut source_xa: Source = Source::new([0u8; 32]);
+
+    pt_want
+        .data
+        .fill_uniform(basek, 0, pt_want.size(), &mut source_xa);
+
+    let mut scratch: ScratchOwned = ScratchOwned::new(
+        GLWESwitchingKey::encrypt_sk_scratch_space(&module, basek, ct_grlwe.k(), rank)
+            | GLWECiphertext::decrypt_scratch_space(&module, basek, ct_glwe.k())
+            | GLWECiphertext::encrypt_sk_scratch_space(&module, basek, ct_glwe.k())
+            | GLWECiphertext::keyswitch_inplace_scratch_space(&module, basek, ct_glwe.k(), ct_grlwe.k(), digits, rank),
+    );
+
+    let mut sk_in: GLWESecret<Vec<u8>> = GLWESecret::alloc(&module, rank);
+    sk_in.fill_ternary_prob(0.5, &mut source_xs);
+    let sk_in_dft: FourierGLWESecret<Vec<u8>, FFT64> = FourierGLWESecret::from(&module, &sk_in);
+
+    let mut sk_out: GLWESecret<Vec<u8>> = GLWESecret::alloc(&module, rank);
+    sk_out.fill_ternary_prob(0.5, &mut source_xs);
+    let sk_out_dft: FourierGLWESecret<Vec<u8>, FFT64> = FourierGLWESecret::from(&module, &sk_out);
+
+    ct_grlwe.generate_from_sk(
+        &module,
+        &sk_in,
+        &sk_out_dft,
+        &mut source_xa,
+        &mut source_xe,
+        sigma,
+        scratch.borrow(),
+    );
+
+    ct_glwe.encrypt_sk(
+        &module,
+        &pt_want,
+        &sk_in_dft,
+        &mut source_xa,
+        &mut source_xe,
+        sigma,
+        scratch.borrow(),
+    );
+
+    ct_glwe.keyswitch_inplace(&module, &ct_grlwe, scratch.borrow());
+
+    ct_glwe.decrypt(&module, &mut pt_have, &sk_out_dft, scratch.borrow());
+
+    module.vec_znx_sub_ab_inplace(&mut pt_have.data, 0, &pt_want.data, 0);
+
+    let noise_have: f64 = pt_have.data.std(0, basek).log2();
+    let noise_want: f64 = log2_std_noise_gglwe_product(
+        module.n() as f64,
+        basek * digits,
+        0.5,
+        0.5,
+        0f64,
+        sigma * sigma,
+        0f64,
+        rank as f64,
+        k_ct,
+        k_ksk,
+    );
+
+    assert!(
+        (noise_have - noise_want).abs() <= 0.5,
+        "{} {}",
+        noise_have,
+        noise_want
+    );
+}