cryptodev_int.h

   1 /* cipher stuff */
   2 #ifndef CRYPTODEV_INT_H
   3 # define CRYPTODEV_INT_H
   4
   5 #include <linux/init.h>
   6 #include <linux/sched.h>
   7 #include <linux/fs.h>
   8 #include <linux/file.h>
   9 #include <linux/fdtable.h>
  10 #include <linux/miscdevice.h>
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/scatterlist.h>
  14 #include "cryptodev.h"
  15
  16 #define PFX "cryptodev: "
  17 #define dprintk(level, severity, format, a...)                  \
  18         do {                                                    \
  19                 if (level <= cryptodev_verbosity)               \
  20                         printk(severity PFX "%s[%u]: " format,  \
  21                                current->comm, current->pid,     \
  22                                ##a);                            \
  23         } while (0)
  24
  25 extern int cryptodev_verbosity;
  26
  27 /* For zero copy */
  28 int __get_userbuf(uint8_t __user *addr, uint32_t len, int write,
  29                 int pgcount, struct page **pg, struct scatterlist *sg,
  30                 struct task_struct *task, struct mm_struct *mm);
  31 void release_user_pages(struct page **pg, int pagecount);
  32
  33 /* last page - first page + 1 */
  34 #define PAGECOUNT(buf, buflen) \
  35         ((((unsigned long)(buf + buflen - 1) & PAGE_MASK) >> PAGE_SHIFT) - \
  36         (((unsigned long) buf               & PAGE_MASK) >> PAGE_SHIFT) + 1)
  37
  38 #define DEFAULT_PREALLOC_PAGES 32
  39
  40 struct cipher_data {
  41         int init; /* 0 uninitialized */
  42         int blocksize;
  43         int ivsize;
  44         struct {
  45                 struct crypto_ablkcipher *s;
  46                 struct cryptodev_result *result;
  47                 struct ablkcipher_request *request;
  48                 uint8_t iv[EALG_MAX_BLOCK_LEN];
  49         } async;
  50 };
  51
  52 int cryptodev_cipher_init(struct cipher_data *out, const char *alg_name,
  53                                                 uint8_t *key, size_t keylen);
  54 void cryptodev_cipher_deinit(struct cipher_data *cdata);
  55 ssize_t cryptodev_cipher_decrypt(struct cipher_data *cdata,
  56                         const struct scatterlist *sg1,
  57                         struct scatterlist *sg2, size_t len);
  58 ssize_t cryptodev_cipher_encrypt(struct cipher_data *cdata,
  59                                 const struct scatterlist *sg1,
  60                                 struct scatterlist *sg2, size_t len);
  61
  62 inline static void cryptodev_cipher_set_iv(struct cipher_data *cdata,
  63                                 void *iv, size_t iv_size)
  64 {
  65         memcpy(cdata->async.iv, iv, min(iv_size, sizeof(cdata->async.iv)));
  66 }
  67
  68 /* hash stuff */
  69 struct hash_data {
  70         int init; /* 0 uninitialized */
  71         int digestsize;
  72         struct {
  73                 struct crypto_ahash *s;
  74                 struct cryptodev_result *result;
  75                 struct ahash_request *request;
  76         } async;
  77 };
  78
  79 int cryptodev_hash_final(struct hash_data *hdata, void *output);
  80 ssize_t cryptodev_hash_update(struct hash_data *hdata,
  81                         struct scatterlist *sg, size_t len);
  82 int cryptodev_hash_reset(struct hash_data *hdata);
  83 void cryptodev_hash_deinit(struct hash_data *hdata);
  84 int cryptodev_hash_init(struct hash_data *hdata, const char *alg_name,
  85                         int hmac_mode, void *mackey, size_t mackeylen);
  86
  87 /* compatibility stuff */
  88 #ifdef CONFIG_COMPAT
  89 #include <linux/compat.h>
  90
  91 /* input of CIOCGSESSION */
  92 struct compat_session_op {
  93         /* Specify either cipher or mac
  94          */
  95         uint32_t        cipher;         /* cryptodev_crypto_op_t */
  96         uint32_t        mac;            /* cryptodev_crypto_op_t */
  97
  98         uint32_t        keylen;
  99         compat_uptr_t   key;            /* pointer to key data */
 100         uint32_t        mackeylen;
 101         compat_uptr_t   mackey;         /* pointer to mac key data */
 102
 103         uint32_t        ses;            /* session identifier */
 104 };
 105
 106 /* input of CIOCCRYPT */
 107  struct compat_crypt_op {
 108         uint32_t        ses;            /* session identifier */
 109         uint16_t        op;             /* COP_ENCRYPT or COP_DECRYPT */
 110         uint16_t        flags;          /* no usage so far, use 0 */
 111         uint32_t        len;            /* length of source data */
 112         compat_uptr_t   src;            /* source data */
 113         compat_uptr_t   dst;            /* pointer to output data */
 114         compat_uptr_t   mac;/* pointer to output data for hash/MAC operations */
 115         compat_uptr_t   iv;/* initialization vector for encryption operations */
 116 };
 117
 118 /* compat ioctls, defined for the above structs */
 119 #define COMPAT_CIOCGSESSION    _IOWR('c', 102, struct compat_session_op)
 120 #define COMPAT_CIOCCRYPT       _IOWR('c', 104, struct compat_crypt_op)
 121 #define COMPAT_CIOCASYNCCRYPT  _IOW('c', 107, struct compat_crypt_op)
 122 #define COMPAT_CIOCASYNCFETCH  _IOR('c', 108, struct compat_crypt_op)
 123
 124 #endif /* CONFIG_COMPAT */
 125
 126 /* kernel-internal extension to struct crypt_op */
 127 struct kernel_crypt_op {
 128         struct crypt_op cop;
 129
 130         int ivlen;
 131         __u8 iv[EALG_MAX_BLOCK_LEN];
 132
 133         int digestsize;
 134         uint8_t hash_output[AALG_MAX_RESULT_LEN];
 135
 136         struct task_struct *task;
 137         struct mm_struct *mm;
 138 };
 139
 140 #endif /* CRYPTODEV_INT_H */