crypto/drbg.c

File Facts

System

Linux kernel

Corpus path

crypto/drbg.c

Extension

.c

Size

18772 bytes

Lines

618

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/rng.h
• crypto/sha2.h
• linux/fips.h
• linux/kernel.h
• linux/module.h
• linux/mutex.h
• linux/string_choices.h
• linux/unaligned.h

Detected Declarations

• struct drbg_state
• function drbg_hmac_update
• function drbg_hmac_generate
• function get_random_bytes
• function drbg_seed
• function drbg_generate
• function drbg_seed
• function drbg_kcapi_init
• function drbg_kcapi_set_entropy
• function drbg_kcapi_seed
• function drbg_kcapi_generate
• function drbg_kcapi_exit
• function drbg_healthcheck_sanity
• function drbg_init
• function drbg_exit
• module init drbg_init

Annotated Snippet

module_init(drbg_init);
module_exit(drbg_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Stephan Mueller <smueller@chronox.de>");
MODULE_DESCRIPTION("NIST SP800-90A Deterministic Random Bit Generator (DRBG)");
MODULE_ALIAS_CRYPTO("stdrng");
MODULE_ALIAS_CRYPTO("drbg_nopr_hmac_sha512");

Annotation

• Immediate include surface: `crypto/internal/rng.h`, `crypto/sha2.h`, `linux/fips.h`, `linux/kernel.h`, `linux/module.h`, `linux/mutex.h`, `linux/string_choices.h`, `linux/unaligned.h`.
• Detected declarations: `struct drbg_state`, `function drbg_hmac_update`, `function drbg_hmac_generate`, `function get_random_bytes`, `function drbg_seed`, `function drbg_generate`, `function drbg_seed`, `function drbg_kcapi_init`, `function drbg_kcapi_set_entropy`, `function drbg_kcapi_seed`.
• Atlas domain: Kernel Services / crypto.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.