azure / Project-Cerberus - Conditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 3,193 units with 69,999 lines of code in units (66.8% of code).

5 very complex units (956 lines of code)
24 complex units (3,498 lines of code)
246 medium complex units (15,753 lines of code)
492 simple units (15,356 lines of code)
2,426 very simple units (34,436 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 50 most complex units

Unit	# lines	McCabe index	# params
int main() in tools/ocp_recovery/ocp_recovery.c	224	64	2
int host_processor_filtered_update_verification() in core/host_fw/host_processor_filtered.c	147	64	6
static int host_processor_filtered_validate_flash() in core/host_fw/host_processor_filtered.c	141	60	13
int cmd_interface_system_process_request() in core/cmd_interface/cmd_interface_system.c	205	52	2
static void big_mpyP() in core/riot/reference/RiotEcc.c	239	51	4
int spdm_key_exchange() in core/spdm/spdm_commands.c	297	49	2
int manifest_flash_read_element_data() in core/manifest/manifest_flash.c	173	46	11
def process_pcd() in tools/manifest_tools/manifest_parser.py	230	42	2
int x509_openssl_create_csr() in projects/linux/asn1/x509_openssl.c	166	39	12
int aux_attestation_unseal() in core/attestation/aux_attestation.c	123	38	16
def load_xmls() in tools/manifest_tools/manifest_common.py	75	33	3
int x509_cert_build_create_ca_signed_certificate() in core/asn1/x509_cert_build.c	132	33	14
int flash_store_contiguous_blocks_write_common() in core/flash/flash_store_contiguous_blocks.c	155	33	6
int manifest_flash_get_child_elements_info() in core/manifest/manifest_flash.c	104	32	9
int spdm_get_certificate() in core/spdm/spdm_commands.c	191	32	2
int x509_mbedtls_create_csr() in core/asn1/x509_mbedtls.c	133	31	12
static int x509_openssl_create_certificate() in projects/linux/asn1/x509_openssl.c	167	31	11
int spdm_get_measurements() in core/spdm/spdm_commands.c	208	30	2
int spdm_challenge() in core/spdm/spdm_commands.c	179	29	2
int state_manager_store_non_volatile_state() in core/state_manager/state_manager.c	112	28	1
static int attestation_requester_negotiate_algorithms_rsp_post_processing() in core/attestation/attestation_requester.c	93	28	2
static int x509_mbedtls_create_certificate() in core/asn1/x509_mbedtls.c	164	27	12
int main() in tools/testing/unseal/unseal.c	133	26	2
static int mock_validate_arg() in testing/mock.c	123	26	5
int mctp_interface_process_packet() in core/mctp/mctp_interface.c	107	26	3
int logging_flash_init_state() in core/logging/logging_flash.c	104	26	1
int spi_flash_clear_block_protect() in core/flash/spi_flash.c	106	26	1
int flash_store_contiguous_blocks_init_state_common() in core/flash/flash_store_contiguous_blocks.c	83	26	4
int spdm_negotiate_algorithms() in core/spdm/spdm_commands.c	140	26	2
static int manifest_flash_verify_v2() in core/manifest/manifest_flash.c	137	25	5
static int attestation_responder_get_certificate() in core/attestation/attestation_responder.c	95	25	4
static int host_processor_dual_flash_rollback() in core/host_fw/host_processor_dual.c	93	25	5
int mctp_base_protocol_interpret() in core/mctp/mctp_base_protocol.c	52	24	15
static int attestation_responder_get_digests() in core/attestation/attestation_responder.c	92	24	5
int pcr_hash_measurement_data() in core/attestation/pcr.c	103	24	6
bool spdm_check_request_flag_compatibility() in core/spdm/spdm_commands.c	42	24	2
int64_t mock_return_from_call() in testing/mock.c	73	23	2
int x509_cert_build_create_csr() in core/asn1/x509_cert_build.c	80	23	12
int x509_cert_build_create_self_signed_certificate() in core/asn1/x509_cert_build.c	87	23	11
int manifest_verification_init_state() in core/manifest/manifest_verification.c	73	23	3
static int attestation_requester_attest_device_spdm() in core/attestation/attestation_requester.c	97	23	5
int spdm_get_capabilities() in core/spdm/spdm_commands.c	127	23	2
int x509_extension_builder_openssl_dme_build() in projects/linux/asn1/dme/x509_extension_builder_openssl_dme.c	111	23	2
int x509_extension_builder_openssl_dice_tcbinfo_build() in projects/linux/asn1/dice/x509_extension_builder_openssl_dice_tcbinfo.c	116	23	2
int ecc_der_decode_public_key_no_copy() in core/asn1/ecc_der_util.c	82	22	3
int ocp_recovery_device_write_request() in core/recovery/ocp_recovery_device.c	70	22	3
static int attestation_requester_send_and_receive_spdm_get_measurements() in core/attestation/attestation_requester.c	93	22	5
bool host_fw_are_images_different() in core/host_fw/host_fw_util.c	58	22	2
int spdm_finish() in core/spdm/spdm_commands.c	149	22	2
int cmd_interface_spdm_process_request() in core/spdm/cmd_interface_spdm_responder.c	84	22	2