forked from Minki/linux
crypto: hash - Remove legacy hash/digest code
6941c3a0 disabled compilation of the legacy digest code but didn't
actually remove it. Rectify this. Also, remove the crypto_hash_type
extern declaration from algapi.h now that the struct is gone.
Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>This commit is contained in:
Benjamin Gilbert
Herbert Xu
parent
667b6294bf
commit
2141b6309b
240
crypto/digest.c
240
crypto/digest.c
@ -1,240 +0,0 @@
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/*
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* Cryptographic API.
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*
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* Digest operations.
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*
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <crypto/scatterwalk.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/hardirq.h>
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#include <linux/highmem.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/scatterlist.h>
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#include "internal.h"
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static int init(struct hash_desc *desc)
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{
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struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
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tfm->__crt_alg->cra_digest.dia_init(tfm);
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return 0;
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}
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static int update2(struct hash_desc *desc,
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struct scatterlist *sg, unsigned int nbytes)
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{
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struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
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unsigned int alignmask = crypto_tfm_alg_alignmask(tfm);
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if (!nbytes)
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return 0;
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for (;;) {
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struct page *pg = sg_page(sg);
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unsigned int offset = sg->offset;
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unsigned int l = sg->length;
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if (unlikely(l > nbytes))
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l = nbytes;
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nbytes -= l;
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do {
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unsigned int bytes_from_page = min(l, ((unsigned int)
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(PAGE_SIZE)) -
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offset);
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char *src = crypto_kmap(pg, 0);
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char *p = src + offset;
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if (unlikely(offset & alignmask)) {
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unsigned int bytes =
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alignmask + 1 - (offset & alignmask);
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bytes = min(bytes, bytes_from_page);
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tfm->__crt_alg->cra_digest.dia_update(tfm, p,
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bytes);
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p += bytes;
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bytes_from_page -= bytes;
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l -= bytes;
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}
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tfm->__crt_alg->cra_digest.dia_update(tfm, p,
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bytes_from_page);
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crypto_kunmap(src, 0);
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crypto_yield(desc->flags);
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offset = 0;
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pg++;
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l -= bytes_from_page;
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} while (l > 0);
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if (!nbytes)
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break;
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sg = scatterwalk_sg_next(sg);
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}
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return 0;
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}
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static int update(struct hash_desc *desc,
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struct scatterlist *sg, unsigned int nbytes)
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{
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if (WARN_ON_ONCE(in_irq()))
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return -EDEADLK;
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return update2(desc, sg, nbytes);
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}
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static int final(struct hash_desc *desc, u8 *out)
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{
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struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
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unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
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struct digest_alg *digest = &tfm->__crt_alg->cra_digest;
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if (unlikely((unsigned long)out & alignmask)) {
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unsigned long align = alignmask + 1;
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unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
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u8 *dst = (u8 *)ALIGN(addr, align) +
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ALIGN(tfm->__crt_alg->cra_ctxsize, align);
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digest->dia_final(tfm, dst);
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memcpy(out, dst, digest->dia_digestsize);
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} else
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digest->dia_final(tfm, out);
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return 0;
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}
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static int nosetkey(struct crypto_hash *tfm, const u8 *key, unsigned int keylen)
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{
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crypto_hash_clear_flags(tfm, CRYPTO_TFM_RES_MASK);
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return -ENOSYS;
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}
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static int setkey(struct crypto_hash *hash, const u8 *key, unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_hash_tfm(hash);
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crypto_hash_clear_flags(hash, CRYPTO_TFM_RES_MASK);
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return tfm->__crt_alg->cra_digest.dia_setkey(tfm, key, keylen);
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}
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static int digest(struct hash_desc *desc,
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struct scatterlist *sg, unsigned int nbytes, u8 *out)
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{
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if (WARN_ON_ONCE(in_irq()))
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return -EDEADLK;
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init(desc);
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update2(desc, sg, nbytes);
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return final(desc, out);
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}
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int crypto_init_digest_ops(struct crypto_tfm *tfm)
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{
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struct hash_tfm *ops = &tfm->crt_hash;
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struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
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if (dalg->dia_digestsize > PAGE_SIZE / 8)
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return -EINVAL;
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ops->init = init;
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ops->update = update;
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ops->final = final;
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ops->digest = digest;
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ops->setkey = dalg->dia_setkey ? setkey : nosetkey;
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ops->digestsize = dalg->dia_digestsize;
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return 0;
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}
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void crypto_exit_digest_ops(struct crypto_tfm *tfm)
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{
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}
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static int digest_async_nosetkey(struct crypto_ahash *tfm_async, const u8 *key,
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unsigned int keylen)
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{
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crypto_ahash_clear_flags(tfm_async, CRYPTO_TFM_RES_MASK);
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return -ENOSYS;
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}
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static int digest_async_setkey(struct crypto_ahash *tfm_async, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_ahash_tfm(tfm_async);
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struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
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crypto_ahash_clear_flags(tfm_async, CRYPTO_TFM_RES_MASK);
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return dalg->dia_setkey(tfm, key, keylen);
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}
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static int digest_async_init(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
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dalg->dia_init(tfm);
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return 0;
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}
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static int digest_async_update(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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update(&desc, req->src, req->nbytes);
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return 0;
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}
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static int digest_async_final(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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final(&desc, req->result);
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return 0;
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}
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static int digest_async_digest(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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return digest(&desc, req->src, req->nbytes, req->result);
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}
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int crypto_init_digest_ops_async(struct crypto_tfm *tfm)
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{
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struct ahash_tfm *crt = &tfm->crt_ahash;
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struct digest_alg *dalg = &tfm->__crt_alg->cra_digest;
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if (dalg->dia_digestsize > PAGE_SIZE / 8)
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return -EINVAL;
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crt->init = digest_async_init;
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crt->update = digest_async_update;
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crt->final = digest_async_final;
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crt->digest = digest_async_digest;
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crt->setkey = dalg->dia_setkey ? digest_async_setkey :
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digest_async_nosetkey;
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crt->digestsize = dalg->dia_digestsize;
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return 0;
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}
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183
crypto/hash.c
183
crypto/hash.c
@ -1,183 +0,0 @@
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/*
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* Cryptographic Hash operations.
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*
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* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <crypto/internal/hash.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/seq_file.h>
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#include "internal.h"
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static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type,
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u32 mask)
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{
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return alg->cra_ctxsize;
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}
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static int hash_setkey_unaligned(struct crypto_hash *crt, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_hash_tfm(crt);
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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unsigned long alignmask = crypto_hash_alignmask(crt);
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int ret;
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u8 *buffer, *alignbuffer;
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unsigned long absize;
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absize = keylen + alignmask;
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buffer = kmalloc(absize, GFP_ATOMIC);
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if (!buffer)
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return -ENOMEM;
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alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
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memcpy(alignbuffer, key, keylen);
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ret = alg->setkey(crt, alignbuffer, keylen);
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memset(alignbuffer, 0, keylen);
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kfree(buffer);
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return ret;
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}
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static int hash_setkey(struct crypto_hash *crt, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_hash_tfm(crt);
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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unsigned long alignmask = crypto_hash_alignmask(crt);
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if ((unsigned long)key & alignmask)
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return hash_setkey_unaligned(crt, key, keylen);
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return alg->setkey(crt, key, keylen);
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}
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static int hash_async_setkey(struct crypto_ahash *tfm_async, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_ahash_tfm(tfm_async);
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struct crypto_hash *tfm_hash = __crypto_hash_cast(tfm);
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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return alg->setkey(tfm_hash, key, keylen);
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}
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static int hash_async_init(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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return alg->init(&desc);
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}
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static int hash_async_update(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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return alg->update(&desc, req->src, req->nbytes);
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}
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static int hash_async_final(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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return alg->final(&desc, req->result);
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}
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static int hash_async_digest(struct ahash_request *req)
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{
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struct crypto_tfm *tfm = req->base.tfm;
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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struct hash_desc desc = {
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.tfm = __crypto_hash_cast(tfm),
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.flags = req->base.flags,
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};
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return alg->digest(&desc, req->src, req->nbytes, req->result);
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}
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static int crypto_init_hash_ops_async(struct crypto_tfm *tfm)
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{
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struct ahash_tfm *crt = &tfm->crt_ahash;
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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crt->init = hash_async_init;
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crt->update = hash_async_update;
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crt->final = hash_async_final;
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crt->digest = hash_async_digest;
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crt->setkey = hash_async_setkey;
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crt->digestsize = alg->digestsize;
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return 0;
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}
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static int crypto_init_hash_ops_sync(struct crypto_tfm *tfm)
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{
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struct hash_tfm *crt = &tfm->crt_hash;
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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crt->init = alg->init;
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crt->update = alg->update;
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crt->final = alg->final;
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crt->digest = alg->digest;
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crt->setkey = hash_setkey;
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crt->digestsize = alg->digestsize;
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return 0;
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}
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static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
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{
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struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
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if (alg->digestsize > PAGE_SIZE / 8)
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return -EINVAL;
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if ((mask & CRYPTO_ALG_TYPE_HASH_MASK) != CRYPTO_ALG_TYPE_HASH_MASK)
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return crypto_init_hash_ops_async(tfm);
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else
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return crypto_init_hash_ops_sync(tfm);
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}
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static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
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__attribute__ ((unused));
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static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
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{
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seq_printf(m, "type : hash\n");
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seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
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seq_printf(m, "digestsize : %u\n", alg->cra_hash.digestsize);
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}
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const struct crypto_type crypto_hash_type = {
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.ctxsize = crypto_hash_ctxsize,
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.init = crypto_init_hash_ops,
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#ifdef CONFIG_PROC_FS
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.show = crypto_hash_show,
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#endif
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};
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EXPORT_SYMBOL_GPL(crypto_hash_type);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Generic cryptographic hash type");
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@ -106,7 +106,6 @@ struct blkcipher_walk {
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extern const struct crypto_type crypto_ablkcipher_type;
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extern const struct crypto_type crypto_aead_type;
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extern const struct crypto_type crypto_blkcipher_type;
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extern const struct crypto_type crypto_hash_type;
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void crypto_mod_put(struct crypto_alg *alg);
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