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