crypto/rsa/rsa_locl.h

   1 /*
   2  * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 #include <openssl/rsa.h>
  11 #include "internal/refcount.h"
  12
  13 struct rsa_st {
  14     /*
  15      * The first parameter is used to pickup errors where this is passed
  16      * instead of aEVP_PKEY, it is set to 0
  17      */
  18     int pad;
  19     long version;
  20     const RSA_METHOD *meth;
  21     /* functional reference if 'meth' is ENGINE-provided */
  22     ENGINE *engine;
  23     BIGNUM *n;
  24     BIGNUM *e;
  25     BIGNUM *d;
  26     BIGNUM *p;
  27     BIGNUM *q;
  28     BIGNUM *dmp1;
  29     BIGNUM *dmq1;
  30     BIGNUM *iqmp;
  31     /* be careful using this if the RSA structure is shared */
  32     CRYPTO_EX_DATA ex_data;
  33     CRYPTO_REF_COUNT references;
  34     int flags;
  35     /* Used to cache montgomery values */
  36     BN_MONT_CTX *_method_mod_n;
  37     BN_MONT_CTX *_method_mod_p;
  38     BN_MONT_CTX *_method_mod_q;
  39     /*
  40      * all BIGNUM values are actually in the following data, if it is not
  41      * NULL
  42      */
  43     char *bignum_data;
  44     BN_BLINDING *blinding;
  45     BN_BLINDING *mt_blinding;
  46     CRYPTO_RWLOCK *lock;
  47 };
  48
  49 struct rsa_meth_st {
  50     char *name;
  51     int (*rsa_pub_enc) (int flen, const unsigned char *from,
  52                         unsigned char *to, RSA *rsa, int padding);
  53     int (*rsa_pub_dec) (int flen, const unsigned char *from,
  54                         unsigned char *to, RSA *rsa, int padding);
  55     int (*rsa_priv_enc) (int flen, const unsigned char *from,
  56                          unsigned char *to, RSA *rsa, int padding);
  57     int (*rsa_priv_dec) (int flen, const unsigned char *from,
  58                          unsigned char *to, RSA *rsa, int padding);
  59     /* Can be null */
  60     int (*rsa_mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
  61     /* Can be null */
  62     int (*bn_mod_exp) (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  63                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  64     /* called at new */
  65     int (*init) (RSA *rsa);
  66     /* called at free */
  67     int (*finish) (RSA *rsa);
  68     /* RSA_METHOD_FLAG_* things */
  69     int flags;
  70     /* may be needed! */
  71     char *app_data;
  72     /*
  73      * New sign and verify functions: some libraries don't allow arbitrary
  74      * data to be signed/verified: this allows them to be used. Note: for
  75      * this to work the RSA_public_decrypt() and RSA_private_encrypt() should
  76      * *NOT* be used RSA_sign(), RSA_verify() should be used instead.
  77      */
  78     int (*rsa_sign) (int type,
  79                      const unsigned char *m, unsigned int m_length,
  80                      unsigned char *sigret, unsigned int *siglen,
  81                      const RSA *rsa);
  82     int (*rsa_verify) (int dtype, const unsigned char *m,
  83                        unsigned int m_length, const unsigned char *sigbuf,
  84                        unsigned int siglen, const RSA *rsa);
  85     /*
  86      * If this callback is NULL, the builtin software RSA key-gen will be
  87      * used. This is for behavioural compatibility whilst the code gets
  88      * rewired, but one day it would be nice to assume there are no such
  89      * things as "builtin software" implementations.
  90      */
  91     int (*rsa_keygen) (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
  92 };
  93
  94 extern int int_rsa_verify(int dtype, const unsigned char *m,
  95                           unsigned int m_len, unsigned char *rm,
  96                           size_t *prm_len, const unsigned char *sigbuf,
  97                           size_t siglen, RSA *rsa);