Merge branch 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping - linux-dev - Linux kernel development work

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author	Linus Torvalds <torvalds@linux-foundation.org>	2013-09-11 19:11:59 -0700
committer	Linus Torvalds <torvalds@linux-foundation.org>	2013-09-11 19:11:59 -0700
commit	3b38f56c9dc262c31391b5ae095178960108049b (patch)
tree	9e1ec7eaf97548cb14f43fc67bf5eb1599bbe220 /include/linux/platform_data
parent	Merge tag 'for-3.12' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf (diff)
parent	drivers: of: fix build break if asm/dma-contiguous.h is missing (diff)

Merge branch 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping

Pull DMA-mapping fix from Marek Szyprowski: "A build bugfix for the device tree support for reserved memory regions. Due to superfluous include the common code failed to build on ARM64 and MIPS architectures. The patch that caused the build break has lived at linux-next for about two weeks and noone noticed the issue, what convinced me that everything was ok" * 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping: drivers: of: fix build break if asm/dma-contiguous.h is missing

Diffstat (limited to 'include/linux/platform_data')

0 files changed, 0 insertions, 0 deletions

// SPDX-License-Identifier: GPL-2.0-or-later /* * CMAC: Cipher Block Mode for Authentication * * Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi> * * Based on work by: * Copyright © 2013 Tom St Denis <tstdenis@elliptictech.com> * Based on crypto/xcbc.c: * Copyright © 2006 USAGI/WIDE Project, * Author: Kazunori Miyazawa <miyazawa@linux-ipv6.org> */ #include <crypto/internal/hash.h> #include <linux/err.h> #include <linux/kernel.h> #include <linux/module.h> /* * +------------------------ * | <parent tfm> * +------------------------ * | cmac_tfm_ctx * +------------------------ * | consts (block size * 2) * +------------------------ */ struct cmac_tfm_ctx { struct crypto_cipher *child; u8 ctx[]; }; /* * +------------------------ * | <shash desc> * +------------------------ * | cmac_desc_ctx * +------------------------ * | odds (block size) * +------------------------ * | prev (block size) * +------------------------ */ struct cmac_desc_ctx { unsigned int len; u8 ctx[]; }; static int crypto_cmac_digest_setkey(struct crypto_shash *parent, const u8 *inkey, unsigned int keylen) { unsigned long alignmask = crypto_shash_alignmask(parent); struct cmac_tfm_ctx *ctx = crypto_shash_ctx(parent); unsigned int bs = crypto_shash_blocksize(parent); __be64 *consts = PTR_ALIGN((void *)ctx->ctx, (alignmask | (__alignof__(__be64) - 1)) + 1); u64 _const[2]; int i, err = 0; u8 msb_mask, gfmask; err = crypto_cipher_setkey(ctx->child, inkey, keylen); if (err) return err; /* encrypt the zero block */ memset(consts, 0, bs); crypto_cipher_encrypt_one(ctx->child, (u8 *)consts, (u8 *)consts); switch (bs) { case 16: gfmask = 0x87; _const[0] = be64_to_cpu(consts[1]); _const[1] = be64_to_cpu(consts[0]); /* gf(2^128) multiply zero-ciphertext with u and u^2 */ for (i = 0; i < 4; i += 2) { msb_mask = ((s64)_const[1] >> 63) & gfmask; _const[1] = (_const[1] << 1) | (_const[0] >> 63); _const[0] = (_const[0] << 1) ^ msb_mask; consts[i + 0] = cpu_to_be64(_const[1]); consts[i + 1] = cpu_to_be64(_const[0]); } break; case 8: gfmask = 0x1B; _const[0] = be64_to_cpu(consts[0]); /* gf(2^64) multiply zero-ciphertext with u and u^2 */ for (i = 0; i < 2; i++) { msb_mask = ((s64)_const[0] >> 63) & gfmask; _const[0] = (_const[0] << 1) ^ msb_mask; consts[i] = cpu_to_be64(_const[0]); } break; } return 0; } static int crypto_cmac_digest_init(struct shash_desc *pdesc) { unsigned long alignmask = crypto_shash_alignmask(pdesc->tfm); struct cmac_desc_ctx *ctx = shash_desc_ctx(pdesc); int bs = crypto_shash_blocksize(pdesc->tfm); u8 *prev = PTR_ALIGN((void *)ctx->ctx, alignmask + 1) + bs; ctx->len = 0; memset(prev, 0, bs); return 0; } static int crypto_cmac_digest_update(struct shash_desc *pdesc, const u8 *p, unsigned int len) { struct crypto_shash *parent = pdesc->tfm; unsigned long alignmask = crypto_shash_alignmask(parent); struct cmac_tfm_ctx *tctx = crypto_shash_ctx(parent); struct cmac_desc_ctx *ctx = shash_desc_ctx(pdesc); struct crypto_cipher *tfm = tctx->child; int bs = crypto_shash_blocksize(parent); u8 *odds = PTR_ALIGN((void *)ctx->ctx, alignmask + 1); u8 *prev = odds + bs; /* checking the data can fill the block */ if ((ctx->len + len) <= bs) { memcpy(odds + ctx->len, p, len); ctx->len += len; return 0; } /* filling odds with new data and encrypting it */ memcpy(odds + ctx->len, p, bs - ctx->len); len -= bs - ctx->len; p += bs - ctx->len; crypto_xor(prev, odds, bs); crypto_cipher_encrypt_one(tfm, prev, prev); /* clearing the length */ ctx->len = 0; /* encrypting the rest of data */ while (len > bs) { crypto_xor(prev, p, bs); crypto_cipher_encrypt_one(tfm, prev, prev); p += bs; len -= bs; } /* keeping the surplus of blocksize */ if (len) { memcpy(odds, p, len); ctx->len = len; } return 0; } static int crypto_cmac_digest_final(struct shash_desc *pdesc, u8 *out) { struct crypto_shash *parent = pdesc->tfm; unsigned long alignmask = crypto_shash_alignmask(parent); struct cmac_tfm_ctx *tctx = crypto_shash_ctx(parent); struct cmac_desc_ctx *ctx = shash_desc_ctx(pdesc); struct crypto_cipher *tfm = tctx->child; int bs = crypto_shash_blocksize(parent); u8 *consts = PTR_ALIGN((void *)tctx->ctx, (alignmask | (__alignof__(__be64) - 1)) + 1); u8 *odds = PTR_ALIGN((void *)ctx->ctx, alignmask + 1); u8 *prev = odds + bs; unsigned int offset = 0; if (ctx->len != bs) { unsigned int rlen; u8 *p = odds + ctx->len; *p = 0x80; p++; rlen = bs - ctx->len - 1; if (rlen) memset(p, 0, rlen); offset += bs; } crypto_xor(prev, odds, bs); crypto_xor(prev, consts + offset, bs); crypto_cipher_encrypt_one(tfm, out, prev); return 0; } static int cmac_init_tfm(struct crypto_tfm *tfm) { struct crypto_cipher *cipher; struct crypto_instance *inst = (void *)tfm->__crt_alg; struct crypto_cipher_spawn *spawn = crypto_instance_ctx(inst); struct cmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); cipher = crypto_spawn_cipher(spawn); if (IS_ERR(cipher)) return PTR_ERR(cipher); ctx->child = cipher; return 0; }; static void cmac_exit_tfm(struct crypto_tfm *tfm) { struct cmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm); crypto_free_cipher(ctx->child); } static int cmac_create(struct crypto_template *tmpl, struct rtattr **tb) { struct shash_instance *inst; struct crypto_cipher_spawn *spawn; struct crypto_alg *alg; unsigned long alignmask; int err; err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH); if (err) return err; inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) return -ENOMEM; spawn = shash_instance_ctx(inst); err = crypto_grab_cipher(spawn, shash_crypto_instance(inst), crypto_attr_alg_name(tb[1]), 0, 0); if (err) goto err_free_inst; alg = crypto_spawn_cipher_alg(spawn); switch (alg->cra_blocksize) { case 16: case 8: break; default: err = -EINVAL; goto err_free_inst; } err = crypto_inst_setname(shash_crypto_instance(inst), tmpl->name, alg); if (err) goto err_free_inst; alignmask = alg->cra_alignmask; inst->alg.base.cra_alignmask = alignmask; inst->alg.base.cra_priority = alg->cra_priority; inst->alg.base.cra_blocksize = alg->cra_blocksize; inst->alg.digestsize = alg->cra_blocksize; inst->alg.descsize = ALIGN(sizeof(struct cmac_desc_ctx), crypto_tfm_ctx_alignment()) + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)) + alg->cra_blocksize * 2; inst->alg.base.cra_ctxsize = ALIGN(sizeof(struct cmac_tfm_ctx), crypto_tfm_ctx_alignment()) + ((alignmask | (__alignof__(__be64) - 1)) & ~(crypto_tfm_ctx_alignment() - 1)) + alg->cra_blocksize * 2; inst->alg.base.cra_init = cmac_init_tfm; inst->alg.base.cra_exit = cmac_exit_tfm; inst->alg.init = crypto_cmac_digest_init; inst->alg.update = crypto_cmac_digest_update; inst->alg.final = crypto_cmac_digest_final; inst->alg.setkey = crypto_cmac_digest_setkey; inst->free = shash_free_singlespawn_instance; err = shash_register_instance(tmpl, inst); if (err) { err_free_inst: shash_free_singlespawn_instance(inst); } return err; } static struct crypto_template crypto_cmac_tmpl = { .name = "cmac", .create = cmac_create, .module = THIS_MODULE, }; static int __init crypto_cmac_module_init(void) { return crypto_register_template(&crypto_cmac_tmpl); } static void __exit crypto_cmac_module_exit(void) { crypto_unregister_template(&crypto_cmac_tmpl); } subsys_initcall(crypto_cmac_module_init); module_exit(crypto_cmac_module_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("CMAC keyed hash algorithm"); MODULE_ALIAS_CRYPTO("cmac");


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