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hanno-beckerhanno-becker
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Derive mlkem_native.h configuration from config file
Previously, mlkem_native.h required users to set MLK_CONFIG_API_* macros before including it, separate from the MLK_CONFIG_* macros used for the build configuration. This distinction between internal and external configuration it confusing. Now, mlkem_native.h derives all API settings from the same build configuration file used internally. - The legacy configuration via MLK_CONFIG_API_XXX still works for backwards compatibility, but will be removed in v2. - New Config Options: * MLK_CONFIG_MULTILEVEL_BUILD: Explicit flag for multi-level builds This makes it simpler to get headers for multi-level builds. In the common case, the configs used in a multi-level build are identical except for the setting of MLK_CONFIG_PARAMETER_SET and MLK_CONFIG_MULTILEVEL_{NO,WITH}_SHARED. However, the latter only affect the build, not the API. With MLK_CONFIG_MULTILEVEL_BUILD exposed as a separate option, mlkem_native.h can use it to determine whether to suffix the namespace prefix with the parameter set (512/768/1024) or not, so no adaptation of MLK_CONFIG_MULTILEVEL_{NO,WITH}_SHARED is needed. Instead, a multi-level header simply becomes: ```c #define MLK_CONFIG_PARAMETER_SET 512 #include "mlkem_native.h" #undef MLK_CONFIG_PARAMETER_SET #define MLK_CONFIG_PARAMETER_SET 768 #include "mlkem_native.h" #undef MLK_CONFIG_PARAMETER_SET #define MLK_CONFIG_PARAMETER_SET 1024 #include "mlkem_native.h" #undef MLK_CONFIG_PARAMETER_SET ``` For backwards compatibility, MLK_CONFIG_MULTILEVEL_BUILD is not used in the build, which continues to detect multilevel builds via the existing options MLK_CONFIG_MULTILEVEL_{WITH,NO}_SHARED. * MLK_CONFIG_NO_SUPERCOP: We had this before in mlkem_native.h as MLK_CONFIG_API_NO_SUPERCOP; it's now in the config and documented. * MLK_CONFIG_CONSTANTS_ONLY: We had this before in mlkem_native.h as MLK_CONFIG_API_CONSTANTS_ONLY; it's now in the config and documented. - Build-Internal vs API Config Separation: Config file now guards build-only options with #if defined(MLK_BUILD_INTERNAL). - Example Directory Restructuring: All examples refactored with mlkem/ subdirectories renamed to mlkem_native/ and CFLAGS configuration replaced by custom configs. Updated READMEs to reflect new paths and clarify which options are set in config files vs passed via CFLAGS. Signed-off-by: Hanno Becker <beckphan@amazon.co.uk>
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‎.github/actions/config-variations/action.yml‎

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Original file line numberDiff line numberDiff line change
@@ -37,7 +37,7 @@ runs:
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shell: bash
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run: |
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make clean
40-
CFLAGS='-DMLK_CONFIG_FILE=\"../../test/break_pct_config.h\"' make func -j4
40+
CFLAGS='-Itest -DMLK_CONFIG_FILE=\"break_pct_config.h\"' make func -j4
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# PCT breakage is done at runtime via MLK_BREAK_PCT
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make run_func # Should be OK
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MLK_BREAK_PCT=0 make run_func # Should be OK
@@ -53,7 +53,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_zeroize_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
56+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_zeroize_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
@@ -66,7 +66,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_native_capability_config_1.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_native_capability_config_1.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
@@ -79,7 +79,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_native_capability_config_0.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
82+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_native_capability_config_0.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
@@ -92,7 +92,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -march=armv8.4-a+sha3 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_native_capability_config_ID_AA64PFR1_EL1.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
95+
cflags: "-std=c11 -march=armv8.4-a+sha3 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_native_capability_config_ID_AA64PFR1_EL1.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
@@ -105,7 +105,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -mavx2 -mbmi2 -mpopcnt -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_native_capability_config_CPUID_AVX2.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
108+
cflags: "-std=c11 -mavx2 -mbmi2 -mpopcnt -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_native_capability_config_CPUID_AVX2.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
@@ -118,7 +118,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/no_asm_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
121+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"no_asm_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
@@ -131,7 +131,7 @@ runs:
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with:
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gh_token: ${{ inputs.gh_token }}
133133
compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/serial_fips202_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
134+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"serial_fips202_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_randombytes_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
147+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_randombytes_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_memcpy_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_memcpy_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_memset_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
173+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_memset_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true
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with:
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gh_token: ${{ inputs.gh_token }}
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compile_mode: native
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cflags: "-std=c11 -D_GNU_SOURCE -DMLK_CONFIG_FILE=\\\\\\\"../../test/custom_stdlib_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
186+
cflags: "-std=c11 -D_GNU_SOURCE -Itest -DMLK_CONFIG_FILE=\\\\\\\"custom_stdlib_config.h\\\\\\\" -fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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ldflags: "-fsanitize=address -fsanitize=undefined -fno-sanitize-recover=all"
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func: true
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kat: true

‎BIBLIOGRAPHY.md‎

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@@ -35,20 +35,22 @@ source code and documentation.
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- National Institute of Standards and Technology
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* URL: https://csrc.nist.gov/projects/cryptographic-module-validation-program/fips-140-3-ig-announcements
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* Referenced from:
38-
- [examples/basic_deterministic/mlkem_native/custom_no_randomized_config.h](examples/basic_deterministic/mlkem_native/custom_no_randomized_config.h)
39-
- [examples/custom_backend/mlkem_native/custom_config.h](examples/custom_backend/mlkem_native/custom_config.h)
40-
- [examples/monolithic_build/config_1024.h](examples/monolithic_build/config_1024.h)
41-
- [examples/monolithic_build/config_512.h](examples/monolithic_build/config_512.h)
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- [examples/monolithic_build/config_768.h](examples/monolithic_build/config_768.h)
43-
- [examples/monolithic_build_multilevel/multilevel_config.h](examples/monolithic_build_multilevel/multilevel_config.h)
38+
- [examples/basic_deterministic/mlkem_native/mlkem_native_config.h](examples/basic_deterministic/mlkem_native/mlkem_native_config.h)
39+
- [examples/bring_your_own_fips202/mlkem_native/mlkem_native_config.h](examples/bring_your_own_fips202/mlkem_native/mlkem_native_config.h)
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- [examples/bring_your_own_fips202_static/mlkem_native/mlkem_native_config.h](examples/bring_your_own_fips202_static/mlkem_native/mlkem_native_config.h)
41+
- [examples/custom_backend/mlkem_native/mlkem_native_config.h](examples/custom_backend/mlkem_native/mlkem_native_config.h)
42+
- [examples/monolithic_build/mlkem_native/mlkem_native_config.h](examples/monolithic_build/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build_multilevel/mlkem_native/mlkem_native_config.h](examples/monolithic_build_multilevel/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build_multilevel/mlkem_native/multilevel_config.h](examples/monolithic_build_multilevel/mlkem_native/multilevel_config.h)
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- [examples/monolithic_build_multilevel_native/mlkem_native/mlkem_native_config.h](examples/monolithic_build_multilevel_native/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build_multilevel_native/multilevel_config.h](examples/monolithic_build_multilevel_native/multilevel_config.h)
45-
- [examples/monolithic_build_native/config_1024.h](examples/monolithic_build_native/config_1024.h)
46-
- [examples/monolithic_build_native/config_512.h](examples/monolithic_build_native/config_512.h)
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- [examples/monolithic_build_native/config_768.h](examples/monolithic_build_native/config_768.h)
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- [examples/monolithic_build_native/mlkem_native/mlkem_native_config.h](examples/monolithic_build_native/mlkem_native/mlkem_native_config.h)
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- [examples/multilevel_build/mlkem_native/mlkem_native_config.h](examples/multilevel_build/mlkem_native/mlkem_native_config.h)
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- [examples/multilevel_build_native/mlkem_native/mlkem_native_config.h](examples/multilevel_build_native/mlkem_native/mlkem_native_config.h)
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- [integration/liboqs/config_aarch64.h](integration/liboqs/config_aarch64.h)
4951
- [integration/liboqs/config_c.h](integration/liboqs/config_c.h)
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- [integration/liboqs/config_x86_64.h](integration/liboqs/config_x86_64.h)
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- [mlkem/src/config.h](mlkem/src/config.h)
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- [mlkem/mlkem_native_config.h](mlkem/mlkem_native_config.h)
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- [mlkem/src/kem.c](mlkem/src/kem.c)
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- [test/break_pct_config.h](test/break_pct_config.h)
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- [test/custom_memcpy_config.h](test/custom_memcpy_config.h)
@@ -81,20 +83,22 @@ source code and documentation.
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* URL: https://csrc.nist.gov/pubs/fips/203/final
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* Referenced from:
8385
- [README.md](README.md)
84-
- [examples/basic_deterministic/mlkem_native/custom_no_randomized_config.h](examples/basic_deterministic/mlkem_native/custom_no_randomized_config.h)
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- [examples/custom_backend/mlkem_native/custom_config.h](examples/custom_backend/mlkem_native/custom_config.h)
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- [examples/monolithic_build/config_1024.h](examples/monolithic_build/config_1024.h)
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- [examples/monolithic_build/config_512.h](examples/monolithic_build/config_512.h)
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- [examples/monolithic_build/config_768.h](examples/monolithic_build/config_768.h)
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- [examples/monolithic_build_multilevel/multilevel_config.h](examples/monolithic_build_multilevel/multilevel_config.h)
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- [examples/basic_deterministic/mlkem_native/mlkem_native_config.h](examples/basic_deterministic/mlkem_native/mlkem_native_config.h)
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- [examples/bring_your_own_fips202/mlkem_native/mlkem_native_config.h](examples/bring_your_own_fips202/mlkem_native/mlkem_native_config.h)
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- [examples/bring_your_own_fips202_static/mlkem_native/mlkem_native_config.h](examples/bring_your_own_fips202_static/mlkem_native/mlkem_native_config.h)
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- [examples/custom_backend/mlkem_native/mlkem_native_config.h](examples/custom_backend/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build/mlkem_native/mlkem_native_config.h](examples/monolithic_build/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build_multilevel/mlkem_native/mlkem_native_config.h](examples/monolithic_build_multilevel/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build_multilevel/mlkem_native/multilevel_config.h](examples/monolithic_build_multilevel/mlkem_native/multilevel_config.h)
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- [examples/monolithic_build_multilevel_native/mlkem_native/mlkem_native_config.h](examples/monolithic_build_multilevel_native/mlkem_native/mlkem_native_config.h)
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- [examples/monolithic_build_multilevel_native/multilevel_config.h](examples/monolithic_build_multilevel_native/multilevel_config.h)
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- [examples/monolithic_build_native/config_1024.h](examples/monolithic_build_native/config_1024.h)
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- [examples/monolithic_build_native/config_512.h](examples/monolithic_build_native/config_512.h)
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- [examples/monolithic_build_native/config_768.h](examples/monolithic_build_native/config_768.h)
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- [examples/monolithic_build_native/mlkem_native/mlkem_native_config.h](examples/monolithic_build_native/mlkem_native/mlkem_native_config.h)
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- [examples/multilevel_build/mlkem_native/mlkem_native_config.h](examples/multilevel_build/mlkem_native/mlkem_native_config.h)
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- [examples/multilevel_build_native/mlkem_native/mlkem_native_config.h](examples/multilevel_build_native/mlkem_native/mlkem_native_config.h)
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- [mlkem/mlkem_native.h](mlkem/mlkem_native.h)
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- [mlkem/mlkem_native_config.h](mlkem/mlkem_native_config.h)
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- [mlkem/src/compress.c](mlkem/src/compress.c)
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- [mlkem/src/compress.h](mlkem/src/compress.h)
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- [mlkem/src/config.h](mlkem/src/config.h)
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- [mlkem/src/fips202/fips202.c](mlkem/src/fips202/fips202.c)
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- [mlkem/src/fips202/fips202x4.c](mlkem/src/fips202/fips202x4.c)
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- [mlkem/src/indcpa.c](mlkem/src/indcpa.c)

‎examples/basic/Makefile‎

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# In this example, we compile the individual mlkem-native source files directly.
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# Alternatively, you can compile the 'monobuild' source file mlkem_native.c.
5656
# See examples/monolithic_build for that.
57-
MLK_SOURCE=$(wildcard \
58-
mlkem_native/mlkem/src/*.c \
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mlkem_native/mlkem/src/**/*.c \
60-
mlkem_native/mlkem/src/**/**/*.c \
61-
mlkem_native/mlkem/src/**/**/**/*.c)
57+
MLK_SOURCE=$(wildcard \
58+
mlkem_native/src/*.c \
59+
mlkem_native/src/**/*.c \
60+
mlkem_native/src/**/**/*.c \
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mlkem_native/src/**/**/**/*.c)
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# Part B:
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@@ -87,7 +87,7 @@ BIN=test_binary
8787
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8888

8989
# Include path for mlkem_native_config.h
90-
CFLAGS += -I mlkem_native/mlkem
90+
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‎examples/basic/main.c‎

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* This requires specifying the parameter set and namespace prefix
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* used for the build.
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*/
14-
#define MLK_CONFIG_API_PARAMETER_SET MLK_CONFIG_PARAMETER_SET
15-
#define MLK_CONFIG_API_NAMESPACE_PREFIX mlkem
16-
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14+
#define MLK_CONFIG_NAMESPACE_PREFIX mlkem
15+
#include "mlkem_native/mlkem_native.h"
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1817
#include "test_only_rng/notrandombytes.h"
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‎examples/basic/mlkem_native/mlkem‎

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examples/monolithic_build/mlkem/mlkem_native.h renamed to examples/basic/mlkem_native/mlkem_native.h

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‎examples/basic/mlkem_native/mlkem_native_config.h‎

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../../../mlkem/mlkem_native_config.h

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‎examples/basic_deterministic/Makefile‎

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# Alternatively, you can compile the 'monobuild' source file mlkem_native.c.
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MLK_SOURCE=$(wildcard \
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mlkem_native/mlkem/src/*.c \
59-
mlkem_native/mlkem/src/**/*.c \
60-
mlkem_native/mlkem/src/**/**/*.c \
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mlkem_native/mlkem/src/**/**/**/*.c)
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mlkem_native/src/*.c \
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mlkem_native/src/**/*.c \
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mlkem_native/src/**/**/*.c \
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mlkem_native/src/**/**/**/*.c)
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# Include path for config
78-
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79-
# Pick prefix
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CFLAGS += -DMLK_CONFIG_NAMESPACE_PREFIX=mlkem
81-
# Set configuration option for deterministic build
82-
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‎examples/basic_deterministic/README.md‎

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44

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This directory contains a minimal example showing how to build **mlkem-native** for use cases only requiring the deterministic key generation and encapsulation APIs (`crypto_kem_keypair_derand` and `crypto_kem_enc_derand`). In that case, no implementation of `randombytes()` has to be provided.
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The configuration file [mlkem_native_config.h](mlkem_native/mlkem_native_config.h) sets `MLK_CONFIG_NO_RANDOMIZED_API`
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to disable the randomized API functions.
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## Components
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An application using mlkem-native as-is needs to include the following components:

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