en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/include/crypto/aes-ccm.h#d47db9bf50d28647689e6743ee93c45cb755ffc3 Merge tag 'libcrypto-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linuxPull crypto library updates from Eric Biggers: "Add library APIs for most AES encryption modes that are used in the kernel (ECB, CBC, CBC-CTS, CTR, XCTR, XTS, GCM, CCM). These AES modes have many in-kernel users that are currently using the crypto_skcipher or crypto_aead APIs. These existing APIs are difficult to use and inefficient. Until now, the lack of proper library support for these has been the main gap in the crypto library. This set of changes is the next stage of addressing it: - Implement the new APIs on top of the existing support for single-block AES in the library. - Fully document the new APIs. - Migrate the only user of the old AES-GCM library API to the new, more flexible API; then remove the old API and its implementation. - Wire up the new APIs to the traditional crypto API by adding crypto_skcipher and crypto_aead algorithms. This makes the new APIs be covered by the traditional crypto API's self-tests. It also makes them be already used for real on systems that don't have architecture-optimized code for these modes. But most importantly, this is a prerequisite for migrating the architecture-optimized code for these AES modes (i.e. arch/*/crypto/aes*) into the library, which as usual will eliminate a lot of redundant "glue" code. Note that unlike some of the other algorithms that have been migrated to the library, e.g. SHA-512, for these AES modes there was too much to get done in one cycle. Nor did it make sense to handle these modes one at a time, because they tend to be coupled together or depend on each other, especially in the architecture-optimized AES code. Thus, most of the benefits (reductions in lines of code, performance improvements, etc.) will follow in later cycles when architecture-optimized code is migrated into the library and users of crypto_skcipher and crypto_aead are updated to use the new APIs. The design of the new APIs was informed by writing proof-of-concept patches for many kernel subsystems currently accessing these same algorithms via crypto_skcipher or crypto_aead (patches 18-33 of https://lore.kernel.org/r/20260707053503.209874-1-ebiggers@kernel.org/). While those patches will be resent for real later, the total diffstat for them was negative 1905 lines. So clearly the new APIs are quite a bit easier to use and align better with what users actually need. Besides the new AES encryption APIs, there are also a few changes for improved AES-CMAC key and context zeroization"* tag 'libcrypto-updates-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: mac80211: fils_aead: Use __cleanup() instead of memzero_explicit() Bluetooth: SMP: clear the aes_cmac_key when done smb: clear the aes_cmac_key and aes_cmac_ctx when done lib/crypto: aes-cmac: Add zeroization functions lib/crypto: aesgcm: Remove old AES-GCM library x86/sev: Remove obsolete virtual address check x86/sev: Use new AES-GCM library crypto: aes - Add CCM support using library crypto: aes - Add GCM support using library crypto: aes - Add XTS support using library crypto: aes - Add CTR and XCTR support using library crypto: aes - Add CBC and CBC-CTS support using library crypto: aes - Add ECB support using library lib/crypto: aes: Add CCM support lib/crypto: aes: Add GCM support lib/crypto: aes: Add XTS support lib/crypto: aes: Add CTR and XCTR support lib/crypto: aes: Add CBC and CBC-CTS support lib/crypto: aes: Add ECB support crypto: xts - Split out __xts_verify_key() helper List of files: /linux/include/crypto/aes-ccm.h Tue, 18 Aug 2026 04:16:42 +0200 Linus Torvalds <torvalds@linux-foundation.org> http://kernelsources.org:8080/source/history/linux/include/crypto/aes-ccm.h#6a1f9969cb79e0e194c160e0737ab301d7da21c1 lib/crypto: aes: Add CCM supportAdd support for AES-CCM to the crypto library.This will be used to provide a streamlined implementation of the"ccm(aes)" crypto_aead algorithm. Most users of "ccm(aes)" will also beable to switch to the library, which as usual will be faster andsimpler, e.g.: - fs/smb/client/ - fs/smb/server/ - net/mac80211/ - net/mac802154/(I've already written proof-of-concept patches for all the above, andthey helped inform the API design.)As in the AES-GCM API, incremental operation is supported. It has to beused carefully, especially when decrypting, but it makes the API generalenough to work well for all users.The AES-CCM library code calls aes_cbcmac_blocks() directly, bypassingthe higher-level aes_cbcmac_init(), aes_cbcmac_update(), andaes_cbcmac_final(). The latter set of functions is useful only forAES-CCM, so they don't make sense to keep around and will be removedonce the "ccm(aes)" crypto_aead starts using the AES-CCM library.Initial test coverage is provided by the crypto_aead support added in alater commit. I'm planning a KUnit test suite as well.Link: https://patch.msgid.link/20260715221153.246410-8-ebiggers@kernel.orgSigned-off-by: Eric Biggers <ebiggers@kernel.org> List of files: /linux/include/crypto/aes-ccm.h Thu, 16 Jul 2026 00:11:47 +0200 Eric Biggers <ebiggers@kernel.org>