189 lines
5.5 KiB
C
189 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/* cipher stuff */
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#ifndef CRYPTODEV_H
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# define CRYPTODEV_H
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#include <linux/version.h>
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0))
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# define reinit_completion(x) INIT_COMPLETION(*(x))
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#endif
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/fdtable.h>
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/scatterlist.h>
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#include <uapi/linux/cryptodev.h>
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#include <crypto/aead.h>
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#define PFX "cryptodev: "
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#define dprintk(level, severity, format, a...) \
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do { \
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if (level <= cryptodev_verbosity) \
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printk(severity PFX "%s[%u] (%s:%u): " format "\n", \
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current->comm, current->pid, \
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__func__, __LINE__, \
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##a); \
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} while (0)
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#define derr(level, format, a...) dprintk(level, KERN_ERR, format, ##a)
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#define dwarning(level, format, a...) dprintk(level, KERN_WARNING, format, ##a)
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#define dinfo(level, format, a...) dprintk(level, KERN_INFO, format, ##a)
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#define ddebug(level, format, a...) dprintk(level, KERN_DEBUG, format, ##a)
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extern int cryptodev_verbosity;
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struct fcrypt {
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struct list_head list;
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struct list_head dma_map_list;
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struct mutex sem;
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};
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/* compatibility stuff */
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#ifdef CONFIG_COMPAT
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#include <linux/compat.h>
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/* input of CIOCGSESSION */
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struct compat_session_op {
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/* Specify either cipher or mac
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*/
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uint32_t cipher; /* cryptodev_crypto_op_t */
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uint32_t mac; /* cryptodev_crypto_op_t */
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uint32_t keylen;
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compat_uptr_t key; /* pointer to key data */
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uint32_t mackeylen;
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compat_uptr_t mackey; /* pointer to mac key data */
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uint32_t ses; /* session identifier */
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};
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/* input of CIOCCRYPT */
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struct compat_crypt_op {
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uint32_t ses; /* session identifier */
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uint16_t op; /* COP_ENCRYPT or COP_DECRYPT */
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uint16_t flags; /* see COP_FLAG_* */
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uint32_t len; /* length of source data */
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compat_uptr_t src; /* source data */
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compat_uptr_t dst; /* pointer to output data */
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compat_uptr_t mac;/* pointer to output data for hash/MAC operations */
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compat_uptr_t iv;/* initialization vector for encryption operations */
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};
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/* input of COMPAT_CIOCAUTHCRYPT */
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struct compat_crypt_auth_op {
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uint32_t ses; /* session identifier */
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uint16_t op; /* COP_ENCRYPT or COP_DECRYPT */
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uint16_t flags; /* see COP_FLAG_AEAD_* */
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uint32_t len; /* length of source data */
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uint32_t auth_len; /* length of auth data */
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compat_uptr_t auth_src; /* authenticated-only data */
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/* The current implementation is more efficient if data are
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* encrypted in-place (src== dst).
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*/
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compat_uptr_t src; /* data to be encrypted and authenticated */
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compat_uptr_t dst; /* pointer to output data. Must have
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* space for tag. For TLS this should be at least
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* len + tag_size + block_size for padding
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*/
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compat_uptr_t tag; /* where the tag will be copied to. TLS mode
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* doesn't use that as tag is copied to dst.
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* SRTP mode copies tag there.
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*/
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uint32_t tag_len; /* the length of the tag. Use zero for digest size or max tag. */
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/* initialization vector for encryption operations */
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compat_uptr_t iv;
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uint32_t iv_len;
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};
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/* compat ioctls, defined for the above structs */
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#define COMPAT_CIOCGSESSION _IOWR('c', 102, struct compat_session_op)
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#define COMPAT_CIOCCRYPT _IOWR('c', 104, struct compat_crypt_op)
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#define COMPAT_CIOCASYNCCRYPT _IOW('c', 107, struct compat_crypt_op)
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#define COMPAT_CIOCASYNCFETCH _IOR('c', 108, struct compat_crypt_op)
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#define COMPAT_CIOCAUTHCRYPT _IOWR('c', 109, struct compat_crypt_auth_op)
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#endif /* CONFIG_COMPAT */
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/* kernel-internal extension to struct crypt_op */
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struct kernel_crypt_op {
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struct crypt_op cop;
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int ivlen;
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__u8 iv[EALG_MAX_BLOCK_LEN];
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int digestsize;
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uint8_t hash_output[AALG_MAX_RESULT_LEN];
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struct task_struct *task;
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struct mm_struct *mm;
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};
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struct kernel_crypt_auth_op {
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struct crypt_auth_op caop;
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int dst_len; /* based on src_len + pad + tag */
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int ivlen;
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__u8 iv[EALG_MAX_BLOCK_LEN];
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struct task_struct *task;
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struct mm_struct *mm;
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};
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/* auth */
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#ifdef CONFIG_COMPAT
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int compat_kcaop_to_user(struct kernel_crypt_auth_op *kcaop,
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struct fcrypt *fcr, void __user *arg);
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int compat_kcaop_from_user(struct kernel_crypt_auth_op *kcaop,
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struct fcrypt *fcr, void __user *arg);
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#endif /* CONFIG_COMPAT */
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int cryptodev_kcaop_from_user(struct kernel_crypt_auth_op *kcop,
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struct fcrypt *fcr, void __user *arg);
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int cryptodev_kcaop_to_user(struct kernel_crypt_auth_op *kcaop,
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struct fcrypt *fcr, void __user *arg);
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int crypto_auth_run(struct fcrypt *fcr, struct kernel_crypt_auth_op *kcaop);
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int crypto_run(struct fcrypt *fcr, struct kernel_crypt_op *kcop);
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#include "cryptlib.h"
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/* other internal structs */
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struct csession {
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struct list_head entry;
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struct mutex sem;
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struct cipher_data cdata;
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struct hash_data hdata;
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uint32_t sid;
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uint32_t alignmask;
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unsigned int array_size;
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unsigned int used_pages; /* the number of pages that are used */
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/* the number of pages marked as NOT-writable; they preceed writeables */
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unsigned int readonly_pages;
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struct page **pages;
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struct scatterlist *sg;
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};
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struct csession *crypto_get_session_by_sid(struct fcrypt *fcr, uint32_t sid);
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int
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crypto_get_sessions_by_sid(struct fcrypt *fcr,
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uint32_t sid_1, struct csession **ses_ptr_1,
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uint32_t sid_2, struct csession **ses_ptr_2);
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static inline void crypto_put_session(struct csession *ses_ptr)
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{
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mutex_unlock(&ses_ptr->sem);
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}
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int cryptodev_adjust_sg_array(struct csession *ses, int pagecount);
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#endif /* CRYPTODEV_INT_H */
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