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linux-headers-5.15.0-186 /
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2026-07-21 06:37
acompress.h
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aead.h
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aes.h
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akcipher.h
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algapi.h
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arc4.h
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asym_tpm_subtype.h
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authenc.h
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b128ops.h
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blake2b.h
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blake2s.h
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blowfish.h
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cast5.h
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cast6.h
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cast_common.h
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chacha.h
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chacha20poly1305.h
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cryptd.h
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ctr.h
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curve25519.h
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des.h
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dh.h
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drbg.h
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ecc_curve.h
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ecdh.h
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engine.h
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gcm.h
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gf128mul.h
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ghash.h
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hash.h
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hash_info.h
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hmac.h
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if_alg.h
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kpp.h
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md5.h
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nhpoly1305.h
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null.h
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padlock.h
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pcrypt.h
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pkcs7.h
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poly1305.h
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public_key.h
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rng.h
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scatterwalk.h
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serpent.h
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sha1.h
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sha1_base.h
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sha2.h
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sha256_base.h
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sha3.h
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sha512_base.h
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skcipher.h
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sm2.h
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sm3.h
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sm3_base.h
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sm4.h
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streebog.h
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twofish.h
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xts.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * CTR: Counter mode * * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au> */ #ifndef _CRYPTO_CTR_H #define _CRYPTO_CTR_H #include <crypto/algapi.h> #include <crypto/internal/skcipher.h> #include <linux/string.h> #include <linux/types.h> #define CTR_RFC3686_NONCE_SIZE 4 #define CTR_RFC3686_IV_SIZE 8 #define CTR_RFC3686_BLOCK_SIZE 16 static inline int crypto_ctr_encrypt_walk(struct skcipher_request *req, void (*fn)(struct crypto_skcipher *, const u8 *, u8 *)) { struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); int blocksize = crypto_skcipher_chunksize(tfm); u8 buf[MAX_CIPHER_BLOCKSIZE]; struct skcipher_walk walk; int err; /* avoid integer division due to variable blocksize parameter */ if (WARN_ON_ONCE(!is_power_of_2(blocksize))) return -EINVAL; err = skcipher_walk_virt(&walk, req, false); while (walk.nbytes > 0) { u8 *dst = walk.dst.virt.addr; u8 *src = walk.src.virt.addr; int nbytes = walk.nbytes; int tail = 0; if (nbytes < walk.total) { tail = walk.nbytes & (blocksize - 1); nbytes -= tail; } do { int bsize = min(nbytes, blocksize); fn(tfm, walk.iv, buf); crypto_xor_cpy(dst, src, buf, bsize); crypto_inc(walk.iv, blocksize); dst += bsize; src += bsize; nbytes -= bsize; } while (nbytes > 0); err = skcipher_walk_done(&walk, tail); } return err; } #endif /* _CRYPTO_CTR_H */