crypto/md5.c

File Facts

System

Linux kernel

Corpus path

crypto/md5.c

Extension

.c

Size

6421 bytes

Lines

237

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• crypto/internal/hash.h
• crypto/md5.h
• linux/kernel.h
• linux/module.h

Detected Declarations

• function __crypto_md5_export
• function __crypto_md5_import
• function __crypto_md5_export_core
• function __crypto_md5_import_core
• function crypto_md5_init
• function crypto_md5_update
• function crypto_md5_final
• function crypto_md5_digest
• function crypto_md5_export
• function crypto_md5_import
• function crypto_md5_export_core
• function crypto_md5_import_core
• function crypto_hmac_md5_setkey
• function crypto_hmac_md5_init
• function crypto_hmac_md5_update
• function crypto_hmac_md5_final
• function crypto_hmac_md5_digest
• function crypto_hmac_md5_export
• function crypto_hmac_md5_import
• function crypto_hmac_md5_export_core
• function crypto_hmac_md5_import_core
• function crypto_md5_mod_init
• function crypto_md5_mod_exit
• module init crypto_md5_mod_init
• export md5_zero_message_hash

Annotated Snippet

module_init(crypto_md5_mod_init);

static void __exit crypto_md5_mod_exit(void)
{
	crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
}
module_exit(crypto_md5_mod_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Crypto API support for MD5 and HMAC-MD5");

MODULE_ALIAS_CRYPTO("md5");
MODULE_ALIAS_CRYPTO("md5-lib");
MODULE_ALIAS_CRYPTO("hmac(md5)");
MODULE_ALIAS_CRYPTO("hmac-md5-lib");

Annotation

• Immediate include surface: `crypto/internal/hash.h`, `crypto/md5.h`, `linux/kernel.h`, `linux/module.h`.
• Detected declarations: `function __crypto_md5_export`, `function __crypto_md5_import`, `function __crypto_md5_export_core`, `function __crypto_md5_import_core`, `function crypto_md5_init`, `function crypto_md5_update`, `function crypto_md5_final`, `function crypto_md5_digest`, `function crypto_md5_export`, `function crypto_md5_import`.
• 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.