crypto/evp/evp_locl.h

   1 /*
   2  * Copyright 2000-2019 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
  23     /* Provider ctx */
  24     void *provctx;
  25     EVP_MD *fetched_digest;
  26 } /* EVP_MD_CTX */ ;
  27
  28 struct evp_cipher_ctx_st {
  29     const EVP_CIPHER *cipher;
  30     ENGINE *engine;             /* functional reference if 'cipher' is
  31                                  * ENGINE-provided */
  32     int encrypt;                /* encrypt or decrypt */
  33     int buf_len;                /* number we have left */
  34     unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
  35     unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
  36     unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
  37     int num;                    /* used by cfb/ofb/ctr mode */
  38     /* FIXME: Should this even exist? It appears unused */
  39     void *app_data;             /* application stuff */
  40     int key_len;                /* May change for variable length cipher */
  41     unsigned long flags;        /* Various flags */
  42     void *cipher_data;          /* per EVP data */
  43     int final_used;
  44     int block_mask;
  45     unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
  46 } /* EVP_CIPHER_CTX */ ;
  47
  48 struct evp_mac_ctx_st {
  49     const EVP_MAC *meth;         /* Method structure */
  50     void *data;                  /* Individual method data */
  51 } /* EVP_MAC_CTX */;
  52
  53 struct evp_kdf_ctx_st {
  54     const EVP_KDF_METHOD *kmeth;
  55     EVP_KDF_IMPL *impl;          /* Algorithm-specific data */
  56 } /* EVP_KDF_CTX */ ;
  57
  58 int PKCS5_v2_PBKDF2_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
  59                              int passlen, ASN1_TYPE *param,
  60                              const EVP_CIPHER *c, const EVP_MD *md,
  61                              int en_de);
  62
  63 struct evp_Encode_Ctx_st {
  64     /* number saved in a partial encode/decode */
  65     int num;
  66     /*
  67      * The length is either the output line length (in input bytes) or the
  68      * shortest input line length that is ok.  Once decoding begins, the
  69      * length is adjusted up each time a longer line is decoded
  70      */
  71     int length;
  72     /* data to encode */
  73     unsigned char enc_data[80];
  74     /* number read on current line */
  75     int line_num;
  76     unsigned int flags;
  77 };
  78
  79 typedef struct evp_pbe_st EVP_PBE_CTL;
  80 DEFINE_STACK_OF(EVP_PBE_CTL)
  81
  82 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len);
  83
  84 #include <openssl/ossl_typ.h>
  85 #include <openssl/core.h>
  86
  87 void *evp_generic_fetch(OPENSSL_CTX *ctx, int operation_id,
  88                         const char *algorithm, const char *properties,
  89                         void *(*new_method)(int nid, const OSSL_DISPATCH *fns,
  90                                             OSSL_PROVIDER *prov),
  91                         int (*upref_method)(void *),
  92                         void (*free_method)(void *));