lib/crypto/sha256.c

Source file repositories/reference/linux-study-clean/lib/crypto/sha256.c

File Facts

System: Linux kernel
Corpus path: lib/crypto/sha256.c
Extension: .c
Size: 14502 bytes
Lines: 516
Domain: Kernel Services
Bucket: lib
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/hmac.h
crypto/sha2.h
linux/export.h
linux/kernel.h
linux/module.h
linux/string.h
linux/unaligned.h
linux/wordpart.h
fips.h
sha256.h

Detected Declarations

function LOAD_OP
function BLEND_OP
function sha256_block_generic
function sha256_blocks_generic
function __sha256_init
function sha224_init
function sha256_init
function __sha256_update
function __sha256_final
function sha224_final
function sha256_final
function sha224
function sha256
function sha256_finup_2x_arch
function sha256_finup_2x_is_optimized_arch
function sha256_finup_2x_sequential
function sha256_finup_2x
function sha256_finup_2x_is_optimized
function __hmac_sha256_preparekey
function hmac_sha224_preparekey
function hmac_sha256_preparekey
function __hmac_sha256_init
function hmac_sha224_init_usingrawkey
function hmac_sha256_init_usingrawkey
function __hmac_sha256_final
function hmac_sha224_final
function hmac_sha256_final
function hmac_sha224
function hmac_sha256
function hmac_sha224_usingrawkey
function hmac_sha256_usingrawkey
function sha256_mod_init
function sha256_mod_exit
module init sha256_mod_init
export sha224_init
export sha256_init
export __sha256_update
export sha224_final
export sha256_final
export sha224
export sha256
export sha256_finup_2x
export sha256_finup_2x_is_optimized
export hmac_sha224_preparekey
export hmac_sha256_preparekey
export __hmac_sha256_init
export hmac_sha224_init_usingrawkey
export hmac_sha256_init_usingrawkey

Annotated Snippet

subsys_initcall(sha256_mod_init);

static void __exit sha256_mod_exit(void)
{
}
module_exit(sha256_mod_exit);
#endif

#endif /* !__DISABLE_EXPORTS */

MODULE_DESCRIPTION("SHA-224, SHA-256, HMAC-SHA224, and HMAC-SHA256 library functions");
MODULE_LICENSE("GPL");

Annotation

Immediate include surface: `crypto/hmac.h`, `crypto/sha2.h`, `linux/export.h`, `linux/kernel.h`, `linux/module.h`, `linux/string.h`, `linux/unaligned.h`, `linux/wordpart.h`.
Detected declarations: `function LOAD_OP`, `function BLEND_OP`, `function sha256_block_generic`, `function sha256_blocks_generic`, `function __sha256_init`, `function sha224_init`, `function sha256_init`, `function __sha256_update`, `function __sha256_final`, `function sha224_final`.
Atlas domain: Kernel Services / lib.
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.