HOL-Light: Add HOL Light proof for aarch64 `polyz_unpack_{17,19}` by mkannwischer · Pull Request #971 · pq-code-package/mldsa-native

mkannwischer · 2026-02-14T16:43:45Z

Resolves HOL-Light: Prove AArch64 polyz_unpack #921

TODO

Merge back missing instructions into s2n-bignum, I opened a PR here.

Add a HOL Light functional correctness proof for the aarch64 ML-DSA function poly_chknorm, which checks whether any polynomial coefficient has absolute value >= a given bound. This commit includes: - Functional correctness proof showing the assembly computes `bitval(?i. i < 256 /\ abs(ival(x i)) >= ival bound)` - autogen support for generating aarch64 HOL Light assembly - Update of s2n-bignum Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

This also fixes the contract of poly_chknorm_native - it was incorrectly modelled as only returning -1 or 0, never 1. This was actually a proof gap - CBMC was not happy with 0U - ret. This commit changes it to use mld_ct_cmask_nonzero_u32 - which has exactly the behavior we want here. Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

- Rewrite expressions during symbolic execution to keep system states readable - Keep quantified propositions folded to the point where case-by-case analysis is needed - Hoist all helper lemmas out of the main proof for better readability Signed-off-by: Hanno Becker <beckphan@amazon.co.uk>

Add functional correctness proofs for polyz_unpack_17 and polyz_unpack_19. Closely following the decompress proofs from mlkem-native: pq-code-package/mlkem-native#1543 Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

Add CBMC contracts for native AArch64 polyz_unpack_17 and polyz_unpack_19 following corresponding HOL-Light specs. Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

oqs-bot · 2026-02-15T05:45:27Z

CBMC Results (ML-DSA-65)

Full Results (178 proofs)

Proof	Status	Current	Previous	Change
`TOTAL`	✅	2354s	2286s	+3.0%
`polyvecl_pointwise_acc_montgomery_c`	✅	247s	226s	+9%
`mld_attempt_signature_generation`	✅	204s	197s	+4%
`sign_verify_internal`	✅	181s	177s	+2%
`poly_pointwise_montgomery_c`	✅	147s	138s	+7%
`polyvec_matrix_expand`	✅	146s	145s	+1%
`rej_uniform_native`	✅	144s	144s	+0%
`mld_invntt_layer`	✅	117s	117s	+0%
`mld_ct_memcmp`	✅	83s	79s	+5%
`polyvec_matrix_expand_serial`	✅	68s	65s	+5%
`sign_signature_internal`	✅	51s	50s	+2%
`mld_ntt_layer`	✅	46s	44s	+5%
`keccak_squeezeblocks_x4`	✅	44s	42s	+5%
`mld_compute_t0_t1_tr_from_sk_components`	✅	26s	27s	-4%
`polymat_permute_bitrev_to_custom`	✅	23s	18s	+28%
`rej_uniform`	✅	21s	21s	+0%
`fqmul`	✅	20s	18s	+11%
`poly_uniform_eta_4x`	✅	20s	17s	+18%
`polyveck_decompose`	✅	20s	16s	+25%
`rej_uniform_c`	✅	20s	19s	+5%
`poly_chknorm_c`	✅	17s	16s	+6%
`poly_uniform_4x`	✅	16s	13s	+23%
`polyt0_unpack`	✅	16s	17s	-6%
`mld_ntt_butterfly_block`	✅	15s	13s	+15%
`mld_polyvecl_permute_bitrev_to_custom_native`	✅	14s	14s	+0%
`keccakf1600x4_permute_native`	✅	13s	14s	-7%
`polyvec_matrix_pointwise_montgomery`	✅	13s	14s	-7%
`polyveck_use_hint`	✅	13s	14s	-7%
`mld_check_pct`	✅	11s	9s	+22%
`polyveck_power2round`	✅	11s	11s	+0%
`sign`	✅	11s	9s	+22%
`keccak_absorb_once_x4`	✅	10s	10s	+0%
`poly_invntt_tomont_c`	✅	10s	8s	+25%
`polyveck_add`	✅	9s	9s	+0%
`polyveck_caddq`	✅	9s	8s	+12%
`polyvecl_ntt`	✅	9s	8s	+12%
`keccakf1600_permute`	✅	8s	9s	-11%
`keccakf1600_permute_native`	✅	8s	9s	-11%
`poly_decompose_c`	✅	8s	7s	+14%
`polyveck_invntt_tomont`	✅	8s	8s	+0%
`polyveck_ntt`	✅	8s	6s	+33%
`polyveck_reduce`	✅	8s	9s	-11%
`mld_h`	✅	7s	3s	+133%
`polyeta_unpack`	✅	7s	7s	+0%
`polyveck_shiftl`	✅	7s	8s	-12%
`decompose`	✅	6s	5s	+20%
`keccak_absorb`	✅	6s	5s	+20%
`mld_compute_pack_z`	✅	6s	7s	-14%
`poly_make_hint`	✅	6s	3s	+100%
`poly_uniform_gamma1_4x`	✅	6s	6s	+0%
`poly_use_hint_c`	✅	6s	7s	-14%
`polyveck_make_hint`	✅	6s	5s	+20%
`sign_open`	✅	6s	5s	+20%
`sign_pk_from_sk`	✅	6s	8s	-25%
`sign_verify_pre_hash_shake256`	✅	6s	6s	+0%
`use_hint`	✅	6s	2s	+200%
`fqscale`	✅	5s	4s	+25%
`mld_sample_s1_s2`	✅	5s	4s	+25%
`mld_sample_s1_s2_serial`	✅	5s	6s	-17%
`montgomery_reduce`	✅	5s	2s	+150%
`poly_challenge`	✅	5s	4s	+25%
`poly_decompose_native`	✅	5s	3s	+67%
`polyveck_pointwise_poly_montgomery`	✅	5s	6s	-17%
`polyveck_sub`	✅	5s	7s	-29%
`polyveck_unpack_t0`	✅	5s	3s	+67%
`polyvecl_chknorm`	✅	5s	5s	+0%
`polyvecl_pointwise_acc_montgomery_native`	✅	5s	5s	+0%
`rej_eta_native`	✅	5s	4s	+25%
`shake128_init`	✅	5s	1s	+400%
`sign_signature`	✅	5s	4s	+25%
`unpack_hints`	✅	5s	5s	+0%
`keccakf1600_xor_bytes (big endian)`	✅	4s	3s	+33%
`keccakf1600x4_permute`	✅	4s	1s	+300%
`mld_ct_sel_int32`	✅	4s	3s	+33%
`mld_value_barrier_u32`	✅	4s	3s	+33%
`mld_value_barrier_u8`	✅	4s	3s	+33%
`pack_pk`	✅	4s	3s	+33%
`pack_sig_c_h`	✅	4s	2s	+100%
`poly_caddq`	✅	4s	3s	+33%
`poly_chknorm_native`	✅	4s	4s	+0%
`poly_ntt_native`	✅	4s	3s	+33%
`poly_pointwise_montgomery`	✅	4s	5s	-20%
`poly_pointwise_montgomery_native`	✅	4s	2s	+100%
`poly_power2round`	✅	4s	5s	-20%
`poly_uniform`	✅	4s	4s	+0%
`poly_uniform_eta`	✅	4s	3s	+33%
`poly_uniform_gamma1`	✅	4s	5s	-20%
`poly_use_hint`	✅	4s	3s	+33%
`poly_use_hint_native`	✅	4s	4s	+0%
`polyt0_pack`	✅	4s	4s	+0%
`polyveck_chknorm`	✅	4s	5s	-20%
`polyvecl_unpack_eta`	✅	4s	5s	-20%
`polyvecl_unpack_z`	✅	4s	2s	+100%
`polyz_unpack_c`	✅	4s	5s	-20%
`polyz_unpack_native`	✅	4s	3s	+33%
`reduce32`	✅	4s	3s	+33%
`rej_eta`	✅	4s	4s	+0%
`rej_eta_c`	✅	4s	3s	+33%
`shake128_release`	✅	4s	3s	+33%
`shake256_init`	✅	4s	2s	+100%
`sign_keypair_internal`	✅	4s	6s	-33%
`sign_signature_extmu`	✅	4s	4s	+0%
`sign_signature_pre_hash_internal`	✅	4s	6s	-33%
`sign_signature_pre_hash_shake256`	✅	4s	4s	+0%
`sign_verify`	✅	4s	4s	+0%
`sign_verify_extmu`	✅	4s	4s	+0%
`unpack_sk`	✅	4s	5s	-20%
`caddq`	✅	3s	3s	+0%
`intt_native_x86_64`	✅	3s	3s	+0%
`keccakf1600_xor_bytes`	✅	3s	3s	+0%
`mld_ct_get_optblocker_u8`	✅	3s	2s	+50%
`mld_keccakf1600_extract_bytes`	✅	3s	2s	+50%
`mld_prepare_domain_separation_prefix`	✅	3s	5s	-40%
`ntt_native_x86_64`	✅	3s	3s	+0%
`pack_sig_z`	✅	3s	2s	+50%
`pack_sk`	✅	3s	2s	+50%
`poly_add`	✅	3s	4s	-25%
`poly_caddq_native`	✅	3s	4s	-25%
`poly_caddq_native_aarch64`	✅	3s	6s	-50%
`poly_chknorm`	✅	3s	3s	+0%
`poly_chknorm_native_aarch64`	✅	3s	-	new
`poly_decompose`	✅	3s	3s	+0%
`poly_invntt_tomont_native`	✅	3s	7s	-57%
`poly_ntt`	✅	3s	5s	-40%
`poly_sub`	✅	3s	5s	-40%
`polyt1_pack`	✅	3s	2s	+50%
`polyt1_unpack`	✅	3s	6s	-50%
`polyveck_pack_eta`	✅	3s	4s	-25%
`polyveck_pack_t0`	✅	3s	3s	+0%
`polyveck_pack_w1`	✅	3s	6s	-50%
`polyveck_unpack_eta`	✅	3s	4s	-25%
`polyvecl_permute_bitrev_to_custom`	✅	3s	3s	+0%
`polyvecl_pointwise_acc_montgomery`	✅	3s	5s	-40%
`polyvecl_uniform_gamma1`	✅	3s	5s	-40%
`polyz_pack`	✅	3s	4s	-25%
`polyz_unpack_17_native_aarch64`	✅	3s	-	new
`polyz_unpack_19_native_aarch64`	✅	3s	-	new
`shake128_squeeze`	✅	3s	2s	+50%
`shake256_finalize`	✅	3s	5s	-40%
`shake256_release`	✅	3s	1s	+200%
`shake256x4_squeezeblocks`	✅	3s	3s	+0%
`sign_verify_pre_hash_internal`	✅	3s	3s	+0%
`sys_check_capability`	✅	3s	3s	+0%
`unpack_pk`	✅	3s	3s	+0%
`unpack_sig`	✅	3s	4s	-25%
`keccak_finalize`	✅	2s	2s	+0%
`keccak_squeeze`	✅	2s	2s	+0%
`keccakf1600_extract_bytes (big endian)`	✅	2s	3s	-33%
`keccakf1600x4_extract_bytes`	✅	2s	1s	+100%
`make_hint`	✅	2s	3s	-33%
`mld_ct_abs_i32`	✅	2s	4s	-50%
`mld_ct_cmask_neg_i32`	✅	2s	2s	+0%
`mld_ct_cmask_nonzero_u8`	✅	2s	2s	+0%
`mld_ct_get_optblocker_i64`	✅	2s	1s	+100%
`mld_ct_get_optblocker_u32`	✅	2s	4s	-50%
`mld_value_barrier_i64`	✅	2s	2s	+0%
`poly_caddq_c`	✅	2s	3s	-33%
`poly_invntt_tomont`	✅	2s	6s	-67%
`poly_ntt_c`	✅	2s	2s	+0%
`poly_reduce`	✅	2s	5s	-60%
`poly_shiftl`	✅	2s	2s	+0%
`polyeta_pack`	✅	2s	2s	+0%
`polyvecl_pack_eta`	✅	2s	4s	-50%
`polyvecl_uniform_gamma1_serial`	✅	2s	4s	-50%
`shake128_absorb`	✅	2s	2s	+0%
`shake128_finalize`	✅	2s	3s	-33%
`shake128x4_squeezeblocks`	✅	2s	1s	+100%
`shake256`	✅	2s	2s	+0%
`shake256_absorb`	✅	2s	5s	-60%
`shake256_squeeze`	✅	2s	2s	+0%
`shake256x4_absorb_once`	✅	2s	4s	-50%
`sign_keypair`	✅	2s	3s	-33%
`keccak_init`	✅	1s	3s	-67%
`keccakf1600x4_xor_bytes`	✅	1s	2s	-50%
`mld_ct_cmask_nonzero_u32`	✅	1s	2s	-50%
`polyw1_pack`	✅	1s	1s	+0%
`polyz_unpack`	✅	1s	2s	-50%
`power2round`	✅	1s	2s	-50%
`shake128x4_absorb_once`	✅	1s	4s	-75%

oqs-bot · 2026-02-15T05:45:53Z

CBMC Results (ML-DSA-44)

Full Results (178 proofs)

Proof	Status	Current	Previous	Change
`TOTAL`	✅	2052s	2055s	-0.1%
`sign_verify_internal`	✅	238s	254s	-6%
`mld_attempt_signature_generation`	✅	220s	221s	-0%
`polyvecl_pointwise_acc_montgomery_c`	✅	196s	208s	-6%
`rej_uniform_native`	✅	139s	144s	-3%
`poly_pointwise_montgomery_c`	✅	130s	143s	-9%
`mld_ct_memcmp`	✅	80s	82s	-2%
`mld_invntt_layer`	✅	50s	50s	+0%
`keccak_squeezeblocks_x4`	✅	44s	44s	+0%
`mld_ntt_layer`	✅	44s	44s	+0%
`sign_signature_internal`	✅	44s	45s	-2%
`poly_invntt_tomont_c`	✅	40s	39s	+3%
`fqmul`	✅	19s	19s	+0%
`rej_uniform`	✅	19s	20s	-5%
`poly_uniform_eta_4x`	✅	18s	19s	-5%
`rej_uniform_c`	✅	18s	20s	-10%
`poly_chknorm_c`	✅	16s	12s	+33%
`polyt0_unpack`	✅	16s	15s	+7%
`keccakf1600x4_permute_native`	✅	15s	14s	+7%
`mld_compute_t0_t1_tr_from_sk_components`	✅	14s	15s	-7%
`poly_uniform_4x`	✅	14s	13s	+8%
`polyeta_unpack`	✅	14s	12s	+17%
`polymat_permute_bitrev_to_custom`	✅	14s	16s	-12%
`mld_polyvecl_permute_bitrev_to_custom_native`	✅	13s	14s	-7%
`polyvec_matrix_expand`	✅	13s	16s	-19%
`mld_ntt_butterfly_block`	✅	12s	13s	-8%
`keccak_absorb_once_x4`	✅	11s	9s	+22%
`polyveck_add`	✅	11s	7s	+57%
`polyz_unpack_c`	✅	11s	12s	-8%
`keccakf1600_permute_native`	✅	9s	6s	+50%
`keccakf1600_permute`	✅	8s	8s	+0%
`keccakf1600x4_permute`	✅	8s	3s	+167%
`poly_use_hint_c`	✅	8s	5s	+60%
`polyvecl_chknorm`	✅	8s	6s	+33%
`mld_compute_pack_z`	✅	7s	6s	+17%
`polyvec_matrix_expand_serial`	✅	7s	7s	+0%
`polyvec_matrix_pointwise_montgomery`	✅	7s	6s	+17%
`polyveck_decompose`	✅	7s	7s	+0%
`sign_pk_from_sk`	✅	7s	6s	+17%
`keccak_absorb`	✅	6s	8s	-25%
`mld_check_pct`	✅	6s	6s	+0%
`poly_challenge`	✅	6s	3s	+100%
`poly_decompose_c`	✅	6s	5s	+20%
`poly_power2round`	✅	6s	5s	+20%
`poly_uniform_gamma1`	✅	6s	4s	+50%
`polyveck_pointwise_poly_montgomery`	✅	6s	5s	+20%
`polyveck_reduce`	✅	6s	5s	+20%
`polyvecl_ntt`	✅	6s	6s	+0%
`sign_keypair_internal`	✅	6s	4s	+50%
`intt_native_x86_64`	✅	5s	3s	+67%
`keccakf1600_extract_bytes (big endian)`	✅	5s	3s	+67%
`mld_ct_get_optblocker_u32`	✅	5s	1s	+400%
`mld_h`	✅	5s	6s	-17%
`mld_prepare_domain_separation_prefix`	✅	5s	5s	+0%
`mld_sample_s1_s2`	✅	5s	4s	+25%
`mld_sample_s1_s2_serial`	✅	5s	3s	+67%
`poly_caddq_native`	✅	5s	2s	+150%
`polyeta_pack`	✅	5s	3s	+67%
`polyt0_pack`	✅	5s	4s	+25%
`polyt1_pack`	✅	5s	1s	+400%
`polyt1_unpack`	✅	5s	4s	+25%
`polyveck_ntt`	✅	5s	4s	+25%
`polyveck_shiftl`	✅	5s	5s	+0%
`polyveck_use_hint`	✅	5s	5s	+0%
`polyvecl_pack_eta`	✅	5s	3s	+67%
`polyvecl_pointwise_acc_montgomery_native`	✅	5s	3s	+67%
`polyvecl_unpack_z`	✅	5s	5s	+0%
`polyz_unpack`	✅	5s	5s	+0%
`shake256_absorb`	✅	5s	2s	+150%
`sign`	✅	5s	5s	+0%
`sign_signature_pre_hash_internal`	✅	5s	4s	+25%
`sign_verify_extmu`	✅	5s	2s	+150%
`unpack_hints`	✅	5s	5s	+0%
`fqscale`	✅	4s	1s	+300%
`keccak_squeeze`	✅	4s	5s	-20%
`keccakf1600_xor_bytes`	✅	4s	2s	+100%
`keccakf1600x4_xor_bytes`	✅	4s	2s	+100%
`make_hint`	✅	4s	3s	+33%
`ntt_native_x86_64`	✅	4s	3s	+33%
`pack_sig_c_h`	✅	4s	4s	+0%
`pack_sig_z`	✅	4s	2s	+100%
`poly_add`	✅	4s	4s	+0%
`poly_caddq`	✅	4s	3s	+33%
`poly_caddq_c`	✅	4s	3s	+33%
`poly_caddq_native_aarch64`	✅	4s	3s	+33%
`poly_decompose_native`	✅	4s	3s	+33%
`poly_ntt_native`	✅	4s	2s	+100%
`poly_pointwise_montgomery_native`	✅	4s	3s	+33%
`poly_shiftl`	✅	4s	4s	+0%
`poly_uniform_eta`	✅	4s	5s	-20%
`poly_uniform_gamma1_4x`	✅	4s	4s	+0%
`polyveck_caddq`	✅	4s	8s	-50%
`polyveck_chknorm`	✅	4s	3s	+33%
`polyveck_invntt_tomont`	✅	4s	6s	-33%
`polyveck_make_hint`	✅	4s	4s	+0%
`polyveck_pack_w1`	✅	4s	4s	+0%
`polyveck_power2round`	✅	4s	6s	-33%
`polyveck_sub`	✅	4s	4s	+0%
`polyveck_unpack_t0`	✅	4s	4s	+0%
`polyvecl_pointwise_acc_montgomery`	✅	4s	4s	+0%
`polyvecl_uniform_gamma1_serial`	✅	4s	3s	+33%
`polyvecl_unpack_eta`	✅	4s	2s	+100%
`polyz_unpack_17_native_aarch64`	✅	4s	-	new
`polyz_unpack_native`	✅	4s	3s	+33%
`rej_eta`	✅	4s	1s	+300%
`rej_eta_c`	✅	4s	4s	+0%
`shake128_finalize`	✅	4s	2s	+100%
`shake128_release`	✅	4s	3s	+33%
`shake256_init`	✅	4s	3s	+33%
`sign_keypair`	✅	4s	2s	+100%
`sign_signature_pre_hash_shake256`	✅	4s	5s	-20%
`sign_verify_pre_hash_internal`	✅	4s	4s	+0%
`sys_check_capability`	✅	4s	4s	+0%
`unpack_sk`	✅	4s	4s	+0%
`caddq`	✅	3s	3s	+0%
`decompose`	✅	3s	3s	+0%
`keccak_finalize`	✅	3s	4s	-25%
`keccakf1600_xor_bytes (big endian)`	✅	3s	2s	+50%
`keccakf1600x4_extract_bytes`	✅	3s	3s	+0%
`mld_ct_cmask_nonzero_u8`	✅	3s	4s	-25%
`mld_ct_get_optblocker_u8`	✅	3s	1s	+200%
`mld_value_barrier_i64`	✅	3s	4s	-25%
`pack_pk`	✅	3s	3s	+0%
`pack_sk`	✅	3s	3s	+0%
`poly_decompose`	✅	3s	4s	-25%
`poly_invntt_tomont`	✅	3s	2s	+50%
`poly_make_hint`	✅	3s	4s	-25%
`poly_ntt`	✅	3s	3s	+0%
`poly_ntt_c`	✅	3s	2s	+50%
`poly_use_hint`	✅	3s	2s	+50%
`polyvecl_uniform_gamma1`	✅	3s	2s	+50%
`polyw1_pack`	✅	3s	2s	+50%
`polyz_pack`	✅	3s	2s	+50%
`polyz_unpack_19_native_aarch64`	✅	3s	-	new
`power2round`	✅	3s	2s	+50%
`reduce32`	✅	3s	3s	+0%
`rej_eta_native`	✅	3s	4s	-25%
`shake128_squeeze`	✅	3s	2s	+50%
`shake128x4_squeezeblocks`	✅	3s	2s	+50%
`shake256`	✅	3s	3s	+0%
`shake256_squeeze`	✅	3s	5s	-40%
`sign_open`	✅	3s	6s	-50%
`sign_signature`	✅	3s	6s	-50%
`sign_signature_extmu`	✅	3s	7s	-57%
`sign_verify`	✅	3s	3s	+0%
`sign_verify_pre_hash_shake256`	✅	3s	3s	+0%
`unpack_pk`	✅	3s	3s	+0%
`mld_ct_abs_i32`	✅	2s	2s	+0%
`mld_ct_cmask_neg_i32`	✅	2s	2s	+0%
`mld_ct_get_optblocker_i64`	✅	2s	2s	+0%
`mld_ct_sel_int32`	✅	2s	4s	-50%
`mld_keccakf1600_extract_bytes`	✅	2s	6s	-67%
`mld_value_barrier_u32`	✅	2s	4s	-50%
`mld_value_barrier_u8`	✅	2s	1s	+100%
`montgomery_reduce`	✅	2s	2s	+0%
`poly_chknorm`	✅	2s	4s	-50%
`poly_chknorm_native`	✅	2s	6s	-67%
`poly_chknorm_native_aarch64`	✅	2s	-	new
`poly_invntt_tomont_native`	✅	2s	4s	-50%
`poly_pointwise_montgomery`	✅	2s	2s	+0%
`poly_reduce`	✅	2s	4s	-50%
`poly_sub`	✅	2s	3s	-33%
`poly_uniform`	✅	2s	5s	-60%
`poly_use_hint_native`	✅	2s	3s	-33%
`polyveck_pack_eta`	✅	2s	3s	-33%
`polyveck_pack_t0`	✅	2s	3s	-33%
`polyveck_unpack_eta`	✅	2s	4s	-50%
`polyvecl_permute_bitrev_to_custom`	✅	2s	2s	+0%
`shake128_absorb`	✅	2s	1s	+100%
`shake128_init`	✅	2s	2s	+0%
`shake128x4_absorb_once`	✅	2s	4s	-50%
`shake256_finalize`	✅	2s	4s	-50%
`shake256x4_absorb_once`	✅	2s	4s	-50%
`shake256x4_squeezeblocks`	✅	2s	2s	+0%
`unpack_sig`	✅	2s	3s	-33%
`keccak_init`	✅	1s	3s	-67%
`mld_ct_cmask_nonzero_u32`	✅	1s	2s	-50%
`shake256_release`	✅	1s	3s	-67%
`use_hint`	✅	1s	2s	-50%

oqs-bot · 2026-02-15T05:47:32Z

CBMC Results (ML-DSA-87)

Full Results (178 proofs)

Proof	Status	Current	Previous	Change
`TOTAL`	✅	2528s	2449s	+3.2%
`sign_verify_internal`	✅	370s	353s	+5%
`mld_attempt_signature_generation`	✅	233s	227s	+3%
`polyvecl_pointwise_acc_montgomery_c`	✅	165s	165s	+0%
`polyvec_matrix_expand`	✅	159s	153s	+4%
`rej_uniform_native`	✅	142s	139s	+2%
`poly_pointwise_montgomery_c`	✅	135s	128s	+5%
`mld_invntt_layer`	✅	114s	114s	+0%
`polyvec_matrix_expand_serial`	✅	106s	110s	-4%
`mld_ct_memcmp`	✅	79s	74s	+7%
`sign_signature_internal`	✅	49s	46s	+7%
`mld_ntt_layer`	✅	46s	44s	+5%
`keccak_squeezeblocks_x4`	✅	43s	42s	+2%
`mld_compute_t0_t1_tr_from_sk_components`	✅	30s	25s	+20%
`polymat_permute_bitrev_to_custom`	✅	25s	24s	+4%
`rej_uniform`	✅	22s	21s	+5%
`fqmul`	✅	21s	18s	+17%
`rej_uniform_c`	✅	18s	16s	+12%
`poly_chknorm_c`	✅	17s	17s	+0%
`poly_uniform_eta_4x`	✅	15s	17s	-12%
`polyt0_unpack`	✅	15s	17s	-12%
`keccakf1600x4_permute_native`	✅	14s	12s	+17%
`poly_uniform_4x`	✅	14s	17s	-18%
`polyveck_power2round`	✅	14s	14s	+0%
`polyeta_unpack`	✅	13s	13s	+0%
`polyvec_matrix_pointwise_montgomery`	✅	13s	12s	+8%
`polyveck_add`	✅	13s	13s	+0%
`mld_ntt_butterfly_block`	✅	12s	13s	-8%
`polyveck_reduce`	✅	12s	13s	-8%
`sign_pk_from_sk`	✅	12s	9s	+33%
`keccak_absorb_once_x4`	✅	11s	10s	+10%
`keccak_absorb`	✅	10s	7s	+43%
`polyveck_chknorm`	✅	10s	6s	+67%
`poly_decompose_c`	✅	9s	7s	+29%
`poly_invntt_tomont_c`	✅	9s	9s	+0%
`polyveck_decompose`	✅	9s	6s	+50%
`polyveck_invntt_tomont`	✅	9s	10s	-10%
`polyveck_ntt`	✅	9s	8s	+12%
`polyveck_pointwise_poly_montgomery`	✅	9s	8s	+12%
`polyveck_use_hint`	✅	9s	9s	+0%
`polyvecl_ntt`	✅	9s	11s	-18%
`sign`	✅	9s	7s	+29%
`mld_sample_s1_s2_serial`	✅	8s	6s	+33%
`unpack_sk`	✅	8s	6s	+33%
`keccakf1600_permute_native`	✅	7s	10s	-30%
`mld_check_pct`	✅	7s	7s	+0%
`mld_polyvecl_permute_bitrev_to_custom_native`	✅	7s	8s	-12%
`mld_sample_s1_s2`	✅	7s	6s	+17%
`polyveck_caddq`	✅	7s	7s	+0%
`sign_verify_extmu`	✅	7s	3s	+133%
`keccakf1600_permute`	✅	6s	7s	-14%
`poly_add`	✅	6s	4s	+50%
`poly_make_hint`	✅	6s	2s	+200%
`polyveck_shiftl`	✅	6s	6s	+0%
`polyveck_sub`	✅	6s	7s	-14%
`polyvecl_uniform_gamma1`	✅	6s	4s	+50%
`polyz_pack`	✅	6s	2s	+200%
`sign_verify`	✅	6s	2s	+200%
`unpack_pk`	✅	6s	6s	+0%
`caddq`	✅	5s	4s	+25%
`mld_compute_pack_z`	✅	5s	7s	-29%
`mld_prepare_domain_separation_prefix`	✅	5s	3s	+67%
`ntt_native_x86_64`	✅	5s	4s	+25%
`poly_invntt_tomont`	✅	5s	2s	+150%
`poly_ntt`	✅	5s	3s	+67%
`poly_uniform`	✅	5s	6s	-17%
`poly_uniform_eta`	✅	5s	4s	+25%
`poly_uniform_gamma1`	✅	5s	3s	+67%
`polyveck_make_hint`	✅	5s	5s	+0%
`polyveck_pack_t0`	✅	5s	2s	+150%
`polyveck_unpack_eta`	✅	5s	3s	+67%
`polyvecl_chknorm`	✅	5s	4s	+25%
`polyvecl_uniform_gamma1_serial`	✅	5s	7s	-29%
`polyvecl_unpack_eta`	✅	5s	3s	+67%
`polyz_unpack_c`	✅	5s	5s	+0%
`rej_eta_native`	✅	5s	5s	+0%
`sign_keypair_internal`	✅	5s	6s	-17%
`sign_signature_pre_hash_internal`	✅	5s	5s	+0%
`sign_signature_pre_hash_shake256`	✅	5s	4s	+25%
`sign_verify_pre_hash_shake256`	✅	5s	4s	+25%
`decompose`	✅	4s	4s	+0%
`mld_ct_get_optblocker_i64`	✅	4s	3s	+33%
`mld_h`	✅	4s	2s	+100%
`mld_value_barrier_u8`	✅	4s	2s	+100%
`pack_sig_z`	✅	4s	3s	+33%
`pack_sk`	✅	4s	3s	+33%
`poly_caddq_c`	✅	4s	3s	+33%
`poly_challenge`	✅	4s	5s	-20%
`poly_chknorm_native`	✅	4s	2s	+100%
`poly_chknorm_native_aarch64`	✅	4s	-	new
`poly_ntt_c`	✅	4s	1s	+300%
`poly_pointwise_montgomery_native`	✅	4s	3s	+33%
`poly_uniform_gamma1_4x`	✅	4s	6s	-33%
`poly_use_hint`	✅	4s	3s	+33%
`polyt0_pack`	✅	4s	5s	-20%
`polyveck_unpack_t0`	✅	4s	6s	-33%
`polyz_unpack_19_native_aarch64`	✅	4s	-	new
`polyz_unpack_native`	✅	4s	4s	+0%
`rej_eta_c`	✅	4s	4s	+0%
`sign_open`	✅	4s	6s	-33%
`sign_signature_extmu`	✅	4s	5s	-20%
`sys_check_capability`	✅	4s	3s	+33%
`unpack_hints`	✅	4s	4s	+0%
`fqscale`	✅	3s	5s	-40%
`intt_native_x86_64`	✅	3s	5s	-40%
`keccak_finalize`	✅	3s	2s	+50%
`keccak_init`	✅	3s	3s	+0%
`keccak_squeeze`	✅	3s	4s	-25%
`keccakf1600_xor_bytes (big endian)`	✅	3s	3s	+0%
`mld_ct_abs_i32`	✅	3s	2s	+50%
`mld_ct_cmask_nonzero_u32`	✅	3s	4s	-25%
`mld_ct_sel_int32`	✅	3s	2s	+50%
`mld_value_barrier_i64`	✅	3s	3s	+0%
`montgomery_reduce`	✅	3s	3s	+0%
`pack_pk`	✅	3s	4s	-25%
`poly_caddq`	✅	3s	2s	+50%
`poly_decompose_native`	✅	3s	5s	-40%
`poly_invntt_tomont_native`	✅	3s	2s	+50%
`poly_ntt_native`	✅	3s	6s	-50%
`poly_pointwise_montgomery`	✅	3s	4s	-25%
`poly_power2round`	✅	3s	3s	+0%
`poly_reduce`	✅	3s	4s	-25%
`poly_shiftl`	✅	3s	2s	+50%
`polyt1_pack`	✅	3s	2s	+50%
`polyveck_pack_w1`	✅	3s	4s	-25%
`polyvecl_pack_eta`	✅	3s	3s	+0%
`polyvecl_pointwise_acc_montgomery_native`	✅	3s	3s	+0%
`polyvecl_unpack_z`	✅	3s	3s	+0%
`power2round`	✅	3s	4s	-25%
`reduce32`	✅	3s	4s	-25%
`shake128_init`	✅	3s	2s	+50%
`shake128_squeeze`	✅	3s	5s	-40%
`shake128x4_squeezeblocks`	✅	3s	2s	+50%
`shake256_absorb`	✅	3s	3s	+0%
`shake256_init`	✅	3s	2s	+50%
`shake256x4_squeezeblocks`	✅	3s	1s	+200%
`sign_keypair`	✅	3s	3s	+0%
`sign_signature`	✅	3s	5s	-40%
`sign_verify_pre_hash_internal`	✅	3s	5s	-40%
`use_hint`	✅	3s	3s	+0%
`keccakf1600_extract_bytes (big endian)`	✅	2s	3s	-33%
`keccakf1600x4_extract_bytes`	✅	2s	2s	+0%
`keccakf1600x4_permute`	✅	2s	2s	+0%
`keccakf1600x4_xor_bytes`	✅	2s	2s	+0%
`make_hint`	✅	2s	5s	-60%
`mld_ct_cmask_neg_i32`	✅	2s	1s	+100%
`mld_ct_cmask_nonzero_u8`	✅	2s	3s	-33%
`mld_ct_get_optblocker_u8`	✅	2s	2s	+0%
`mld_keccakf1600_extract_bytes`	✅	2s	1s	+100%
`mld_value_barrier_u32`	✅	2s	2s	+0%
`pack_sig_c_h`	✅	2s	3s	-33%
`poly_caddq_native`	✅	2s	2s	+0%
`poly_caddq_native_aarch64`	✅	2s	3s	-33%
`poly_chknorm`	✅	2s	2s	+0%
`poly_decompose`	✅	2s	3s	-33%
`poly_sub`	✅	2s	3s	-33%
`poly_use_hint_c`	✅	2s	4s	-50%
`poly_use_hint_native`	✅	2s	4s	-50%
`polyeta_pack`	✅	2s	4s	-50%
`polyt1_unpack`	✅	2s	3s	-33%
`polyveck_pack_eta`	✅	2s	2s	+0%
`polyvecl_permute_bitrev_to_custom`	✅	2s	2s	+0%
`polyvecl_pointwise_acc_montgomery`	✅	2s	4s	-50%
`polyw1_pack`	✅	2s	2s	+0%
`polyz_unpack`	✅	2s	3s	-33%
`polyz_unpack_17_native_aarch64`	✅	2s	-	new
`rej_eta`	✅	2s	2s	+0%
`shake128_absorb`	✅	2s	2s	+0%
`shake128_finalize`	✅	2s	3s	-33%
`shake128_release`	✅	2s	3s	-33%
`shake128x4_absorb_once`	✅	2s	4s	-50%
`shake256`	✅	2s	4s	-50%
`shake256_finalize`	✅	2s	3s	-33%
`shake256_release`	✅	2s	3s	-33%
`shake256_squeeze`	✅	2s	2s	+0%
`shake256x4_absorb_once`	✅	2s	2s	+0%
`keccakf1600_xor_bytes`	✅	1s	2s	-50%
`mld_ct_get_optblocker_u32`	✅	1s	2s	-50%
`unpack_sig`	✅	1s	5s	-80%

hanno-becker · 2026-02-15T05:55:28Z

proofs/hol_light/aarch64/proofs/mldsa_polyz_unpack_17.ml

+                       num_of_wordlist (MAP zunpack17 l) /\
+                  (!i. i < 256 ==>
+                       --(&(2 EXP 17) - &1) <= ival(EL i (MAP zunpack17 l)) /\
+                       ival(EL i (MAP zunpack17 l)) <= &(2 EXP 17)))


Slight divergence from other proofs: This is a consequence of the

read(memory :> bytes(r,1024)) s = num_of_wordlist (MAP zunpack17 l) /\

post-condition and could be derived as a corollary in the SUBROUTINE spec. This would leave XXX_CORRECT confined to the core argument, which I'd prefer.

mkannwischer and others added 3 commits February 14, 2026 17:23

mkannwischer changed the title ~~HOL-Light: Add HOL Light proof for aarch64 polyz_unpack_17~~ HOL-Light: Add HOL Light proof for aarch64 polyz_unpack_{17,19} Feb 14, 2026

mkannwischer added 2 commits February 15, 2026 06:05

CBMC: Add CBMC proof for aarch64 polyz_unpack

855dcd4

Add CBMC contracts for native AArch64 polyz_unpack_17 and polyz_unpack_19 following corresponding HOL-Light specs. Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

mkannwischer force-pushed the hol-arm-zunpack branch from 9981590 to 855dcd4 Compare February 15, 2026 05:05

mkannwischer mentioned this pull request Feb 15, 2026

Arm: Add Neon instructions for mldsa-native polyz_unpack awslabs/s2n-bignum#351

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mkannwischer marked this pull request as ready for review February 15, 2026 05:35

mkannwischer requested a review from a team as a code owner February 15, 2026 05:35

hanno-becker reviewed Feb 15, 2026

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HOL-Light: Add HOL Light proof for aarch64 `polyz_unpack_{17,19}`#971

HOL-Light: Add HOL Light proof for aarch64 `polyz_unpack_{17,19}`#971
mkannwischer wants to merge 5 commits intomainfrom
hol-arm-zunpack

mkannwischer commented Feb 14, 2026 •

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CBMC Results (ML-DSA-65)

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CBMC Results (ML-DSA-44)

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CBMC Results (ML-DSA-87)

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mkannwischer commented Feb 14, 2026 •

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