crypto/evp/evp_locl.h

   1 /*
   2  * Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /* EVP_MD_CTX related stuff */
  11
  12 struct evp_md_ctx_st {
  13     const EVP_MD *digest;
  14     ENGINE *engine;             /* functional reference if 'digest' is
  15                                  * ENGINE-provided */
  16     unsigned long flags;
  17     void *md_data;
  18     /* Public key context for sign/verify */
  19     EVP_PKEY_CTX *pctx;
  20     /* Update function: usually copied from EVP_MD */
  21     int (*update) (EVP_MD_CTX *ctx, const void *data, size_t count);
  22 } /* EVP_MD_CTX */ ;
  23
  24 struct evp_cipher_ctx_st {
  25     const EVP_CIPHER *cipher;
  26     ENGINE *engine;             /* functional reference if 'cipher' is
  27                                  * ENGINE-provided */
  28     int encrypt;                /* encrypt or decrypt */
  29     int buf_len;                /* number we have left */
  30     unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
  31     unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
  32     unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
  33     int num;                    /* used by cfb/ofb/ctr mode */
  34     /* FIXME: Should this even exist? It appears unused */
  35     void *app_data;             /* application stuff */
  36     int key_len;                /* May change for variable length cipher */
  37     unsigned long flags;        /* Various flags */
  38     void *cipher_data;          /* per EVP data */
  39     int final_used;
  40     int block_mask;
  41     unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
  42 } /* EVP_CIPHER_CTX */ ;
  43
  44 struct evp_mac_ctx_st {
  45     const EVP_MAC *meth;         /* Method structure */
  46     void *data;                  /* Individual method data */
  47 } /* EVP_MAC_CTX */;
  48
  49 struct evp_kdf_ctx_st {
  50     const EVP_KDF_METHOD *kmeth;
  51     EVP_KDF_IMPL *impl;          /* Algorithm-specific data */
  52 } /* EVP_KDF_CTX */ ;
  53
  54 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
  55                              int passlen, ASN1_TYPE *param,
  56                              const EVP_CIPHER *c, const EVP_MD *md,
  57                              int en_de);
  58
  59 struct evp_Encode_Ctx_st {
  60     /* number saved in a partial encode/decode */
  61     int num;
  62     /*
  63      * The length is either the output line length (in input bytes) or the
  64      * shortest input line length that is ok.  Once decoding begins, the
  65      * length is adjusted up each time a longer line is decoded
  66      */
  67     int length;
  68     /* data to encode */
  69     unsigned char enc_data[80];
  70     /* number read on current line */
  71     int line_num;
  72     unsigned int flags;
  73 };
  74
  75 typedef struct evp_pbe_st EVP_PBE_CTL;
  76 DEFINE_STACK_OF(EVP_PBE_CTL)
  77
  78 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);