crypto/hmac.c

File Facts

System

Linux kernel

Corpus path

crypto/hmac.c

Extension

.c

Size

14492 bytes

Lines

551

Domain

Kernel Services

Bucket

crypto

Inferred role

Kernel Services: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• crypto/hmac.h
• crypto/internal/hash.h
• linux/err.h
• linux/fips.h
• linux/kernel.h
• linux/module.h
• linux/slab.h
• linux/string.h

Detected Declarations

• struct hmac_ctx
• struct ahash_hmac_ctx
• function hmac_setkey
• function hmac_export
• function hmac_import
• function hmac_export_core
• function hmac_import_core
• function hmac_init
• function hmac_update
• function hmac_finup
• function hmac_init_tfm
• function hmac_exit_tfm
• function __hmac_create_shash
• function hmac_setkey_ahash
• function hmac_export_ahash
• function hmac_import_ahash
• function hmac_export_core_ahash
• function hmac_import_core_ahash
• function hmac_init_ahash
• function hmac_update_ahash
• function hmac_finup_finish
• function hmac_finup_done
• function hmac_finup_ahash
• function hmac_digest_ahash
• function hmac_init_ahash_tfm
• function hmac_exit_ahash_tfm
• function hmac_create_ahash
• function hmac_create
• function hmac_create_shash
• function hmac_module_init
• function hmac_module_exit
• module init hmac_module_init

Annotated Snippet

module_init(hmac_module_init);
module_exit(hmac_module_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("HMAC hash algorithm");
MODULE_ALIAS_CRYPTO("hmac");

Annotation

• Immediate include surface: `crypto/hmac.h`, `crypto/internal/hash.h`, `linux/err.h`, `linux/fips.h`, `linux/kernel.h`, `linux/module.h`, `linux/slab.h`, `linux/string.h`.
• Detected declarations: `struct hmac_ctx`, `struct ahash_hmac_ctx`, `function hmac_setkey`, `function hmac_export`, `function hmac_import`, `function hmac_export_core`, `function hmac_import_core`, `function hmac_init`, `function hmac_update`, `function hmac_finup`.
• Atlas domain: Kernel Services / crypto.
• Implementation status: integration implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.