crypto/gcm.c

File Facts

System

Linux kernel

Corpus path

crypto/gcm.c

Extension

.c

Size

23306 bytes

Lines

875

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/internal/aead.h
• crypto/internal/skcipher.h
• crypto/scatterwalk.h
• crypto/gcm.h
• crypto/gf128hash.h
• linux/err.h
• linux/init.h
• linux/kernel.h
• linux/module.h
• linux/slab.h

Detected Declarations

• struct gcm_instance_ctx
• struct crypto_gcm_ctx
• struct crypto_rfc4106_ctx
• struct crypto_rfc4106_req_ctx
• struct crypto_rfc4543_instance_ctx
• struct crypto_rfc4543_ctx
• struct crypto_rfc4543_req_ctx
• struct crypto_gcm_req_priv_ctx
• function crypto_gcm_setkey
• function crypto_gcm_setauthsize
• function crypto_gcm_init_common
• function crypto_gcm_init_crypt
• function ghash_update_sg_and_pad
• function gcm_hash
• function gcm_add_auth_tag
• function gcm_encrypt_done
• function crypto_gcm_encrypt
• function crypto_gcm_verify
• function gcm_decrypt_done
• function crypto_gcm_decrypt
• function crypto_gcm_init_tfm
• function crypto_gcm_exit_tfm
• function crypto_gcm_free
• function crypto_gcm_create_common
• function crypto_gcm_create
• function crypto_gcm_base_create
• function crypto_rfc4106_setkey
• function crypto_rfc4106_setauthsize
• function crypto_rfc4106_encrypt
• function crypto_rfc4106_decrypt
• function crypto_rfc4106_init_tfm
• function crypto_rfc4106_exit_tfm
• function crypto_rfc4106_free
• function crypto_rfc4106_create
• function crypto_rfc4543_setkey
• function crypto_rfc4543_setauthsize
• function crypto_rfc4543_crypt
• function crypto_rfc4543_encrypt
• function crypto_rfc4543_decrypt
• function crypto_rfc4543_init_tfm
• function crypto_rfc4543_exit_tfm
• function crypto_rfc4543_free
• function crypto_rfc4543_create
• function crypto_gcm_module_init
• function crypto_gcm_module_exit
• module init crypto_gcm_module_init

Annotated Snippet

module_init(crypto_gcm_module_init);
module_exit(crypto_gcm_module_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Galois/Counter Mode");
MODULE_AUTHOR("Mikko Herranen <mh1@iki.fi>");
MODULE_ALIAS_CRYPTO("gcm_base");
MODULE_ALIAS_CRYPTO("rfc4106");
MODULE_ALIAS_CRYPTO("rfc4543");
MODULE_ALIAS_CRYPTO("gcm");

Annotation

• Immediate include surface: `crypto/internal/aead.h`, `crypto/internal/skcipher.h`, `crypto/scatterwalk.h`, `crypto/gcm.h`, `crypto/gf128hash.h`, `linux/err.h`, `linux/init.h`, `linux/kernel.h`.
• Detected declarations: `struct gcm_instance_ctx`, `struct crypto_gcm_ctx`, `struct crypto_rfc4106_ctx`, `struct crypto_rfc4106_req_ctx`, `struct crypto_rfc4543_instance_ctx`, `struct crypto_rfc4543_ctx`, `struct crypto_rfc4543_req_ctx`, `struct crypto_gcm_req_priv_ctx`, `function crypto_gcm_setkey`, `function crypto_gcm_setauthsize`.
• 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.