crypto/rsa/rsa_local.h

   1 /*
   2  * Copyright 2006-2020 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 #ifndef OSSL_CRYPTO_RSA_LOCAL_H
  11 #define OSSL_CRYPTO_RSA_LOCAL_H
  12
  13 #include <openssl/rsa.h>
  14 #include "internal/refcount.h"
  15 #include "crypto/rsa.h"
  16
  17 #define RSA_MAX_PRIME_NUM       5
  18 #define RSA_MIN_MODULUS_BITS    512
  19
  20 typedef struct rsa_prime_info_st {
  21     BIGNUM *r;
  22     BIGNUM *d;
  23     BIGNUM *t;
  24     /* save product of primes prior to this one */
  25     BIGNUM *pp;
  26     BN_MONT_CTX *m;
  27 } RSA_PRIME_INFO;
  28
  29 DECLARE_ASN1_ITEM(RSA_PRIME_INFO)
  30 DEFINE_STACK_OF(RSA_PRIME_INFO)
  31
  32 struct rsa_st {
  33     /*
  34      * #legacy
  35      * The first field is used to pickup errors where this is passed
  36      * instead of an EVP_PKEY.  It is always zero.
  37      * THIS MUST REMAIN THE FIRST FIELD.
  38      */
  39     int dummy_zero;
  40
  41     OPENSSL_CTX *libctx;
  42     int32_t version;
  43     const RSA_METHOD *meth;
  44     /* functional reference if 'meth' is ENGINE-provided */
  45     ENGINE *engine;
  46     BIGNUM *n;
  47     BIGNUM *e;
  48     BIGNUM *d;
  49     BIGNUM *p;
  50     BIGNUM *q;
  51     BIGNUM *dmp1;
  52     BIGNUM *dmq1;
  53     BIGNUM *iqmp;
  54
  55     /*
  56      * If a PSS only key this contains the parameter restrictions.
  57      * There are two structures for the same thing, used in different cases.
  58      */
  59     /* This is used uniquely by OpenSSL provider implementations. */
  60     RSA_PSS_PARAMS_30 pss_params;
  61 #ifndef FIPS_MODULE
  62     /* This is used uniquely by rsa_ameth.c and rsa_pmeth.c. */
  63     RSA_PSS_PARAMS *pss;
  64 #endif
  65
  66 #ifndef FIPS_MODULE
  67     /* for multi-prime RSA, defined in RFC 8017 */
  68     STACK_OF(RSA_PRIME_INFO) *prime_infos;
  69     /* Be careful using this if the RSA structure is shared */
  70     CRYPTO_EX_DATA ex_data;
  71 #endif
  72     CRYPTO_REF_COUNT references;
  73     int flags;
  74     /* Used to cache montgomery values */
  75     BN_MONT_CTX *_method_mod_n;
  76     BN_MONT_CTX *_method_mod_p;
  77     BN_MONT_CTX *_method_mod_q;
  78     /*
  79      * all BIGNUM values are actually in the following data, if it is not
  80      * NULL
  81      */
  82     char *bignum_data;
  83     BN_BLINDING *blinding;
  84     BN_BLINDING *mt_blinding;
  85     CRYPTO_RWLOCK *lock;
  86
  87     int dirty_cnt;
  88 };
  89
  90 struct rsa_meth_st {
  91     char *name;
  92     int (*rsa_pub_enc) (int flen, const unsigned char *from,
  93                         unsigned char *to, RSA *rsa, int padding);
  94     int (*rsa_pub_dec) (int flen, const unsigned char *from,
  95                         unsigned char *to, RSA *rsa, int padding);
  96     int (*rsa_priv_enc) (int flen, const unsigned char *from,
  97                          unsigned char *to, RSA *rsa, int padding);
  98     int (*rsa_priv_dec) (int flen, const unsigned char *from,
  99                          unsigned char *to, RSA *rsa, int padding);
 100     /* Can be null */
 101     int (*rsa_mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
 102     /* Can be null */
 103     int (*bn_mod_exp) (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 104                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
 105     /* called at new */
 106     int (*init) (RSA *rsa);
 107     /* called at free */
 108     int (*finish) (RSA *rsa);
 109     /* RSA_METHOD_FLAG_* things */
 110     int flags;
 111     /* may be needed! */
 112     char *app_data;
 113     /*
 114      * New sign and verify functions: some libraries don't allow arbitrary
 115      * data to be signed/verified: this allows them to be used. Note: for
 116      * this to work the RSA_public_decrypt() and RSA_private_encrypt() should
 117      * *NOT* be used RSA_sign(), RSA_verify() should be used instead.
 118      */
 119     int (*rsa_sign) (int type,
 120                      const unsigned char *m, unsigned int m_length,
 121                      unsigned char *sigret, unsigned int *siglen,
 122                      const RSA *rsa);
 123     int (*rsa_verify) (int dtype, const unsigned char *m,
 124                        unsigned int m_length, const unsigned char *sigbuf,
 125                        unsigned int siglen, const RSA *rsa);
 126     /*
 127      * If this callback is NULL, the builtin software RSA key-gen will be
 128      * used. This is for behavioural compatibility whilst the code gets
 129      * rewired, but one day it would be nice to assume there are no such
 130      * things as "builtin software" implementations.
 131      */
 132     int (*rsa_keygen) (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
 133     int (*rsa_multi_prime_keygen) (RSA *rsa, int bits, int primes,
 134                                    BIGNUM *e, BN_GENCB *cb);
 135 };
 136
 137 /* Macros to test if a pkey or ctx is for a PSS key */
 138 #define pkey_is_pss(pkey) (pkey->ameth->pkey_id == EVP_PKEY_RSA_PSS)
 139 #define pkey_ctx_is_pss(ctx) (ctx->pmeth->pkey_id == EVP_PKEY_RSA_PSS)
 140
 141 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
 142                                       const EVP_MD *mgf1md, int saltlen);
 143 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
 144                       const EVP_MD **pmgf1md, int *psaltlen);
 145 /* internal function to clear and free multi-prime parameters */
 146 void rsa_multip_info_free_ex(RSA_PRIME_INFO *pinfo);
 147 void rsa_multip_info_free(RSA_PRIME_INFO *pinfo);
 148 RSA_PRIME_INFO *rsa_multip_info_new(void);
 149 int rsa_multip_calc_product(RSA *rsa);
 150 int rsa_multip_cap(int bits);
 151
 152 int rsa_sp800_56b_validate_strength(int nbits, int strength);
 153 int rsa_check_pminusq_diff(BIGNUM *diff, const BIGNUM *p, const BIGNUM *q,
 154                            int nbits);
 155 int rsa_get_lcm(BN_CTX *ctx, const BIGNUM *p, const BIGNUM *q,
 156                 BIGNUM *lcm, BIGNUM *gcd, BIGNUM *p1, BIGNUM *q1,
 157                 BIGNUM *p1q1);
 158
 159 int rsa_check_public_exponent(const BIGNUM *e);
 160 int rsa_check_private_exponent(const RSA *rsa, int nbits, BN_CTX *ctx);
 161 int rsa_check_prime_factor(BIGNUM *p, BIGNUM *e, int nbits, BN_CTX *ctx);
 162 int rsa_check_prime_factor_range(const BIGNUM *p, int nbits, BN_CTX *ctx);
 163 int rsa_check_crt_components(const RSA *rsa, BN_CTX *ctx);
 164
 165 int rsa_sp800_56b_pairwise_test(RSA *rsa, BN_CTX *ctx);
 166 int rsa_sp800_56b_check_public(const RSA *rsa);
 167 int rsa_sp800_56b_check_private(const RSA *rsa);
 168 int rsa_sp800_56b_check_keypair(const RSA *rsa, const BIGNUM *efixed,
 169                                 int strength, int nbits);
 170 int rsa_sp800_56b_generate_key(RSA *rsa, int nbits, const BIGNUM *efixed,
 171                                BN_GENCB *cb);
 172
 173 int rsa_sp800_56b_derive_params_from_pq(RSA *rsa, int nbits,
 174                                         const BIGNUM *e, BN_CTX *ctx);
 175 int rsa_fips186_4_gen_prob_primes(RSA *rsa, BIGNUM *p1, BIGNUM *p2,
 176                                   BIGNUM *Xpout, const BIGNUM *Xp,
 177                                   const BIGNUM *Xp1, const BIGNUM *Xp2,
 178                                   BIGNUM *q1, BIGNUM *q2, BIGNUM *Xqout,
 179                                   const BIGNUM *Xq, const BIGNUM *Xq1,
 180                                   const BIGNUM *Xq2, int nbits,
 181                                   const BIGNUM *e, BN_CTX *ctx, BN_GENCB *cb);
 182
 183 int rsa_padding_add_SSLv23_with_libctx(OPENSSL_CTX *libctx, unsigned char *to,
 184                                        int tlen, const unsigned char *from,
 185                                        int flen);
 186 int rsa_padding_add_PKCS1_type_2_with_libctx(OPENSSL_CTX *libctx,
 187                                              unsigned char *to, int tlen,
 188                                              const unsigned char *from,
 189                                              int flen);
 190 int rsa_padding_add_PKCS1_OAEP_mgf1_with_libctx(OPENSSL_CTX *libctx,
 191                                                 unsigned char *to, int tlen,
 192                                                 const unsigned char *from,
 193                                                 int flen,
 194                                                 const unsigned char *param,
 195                                                 int plen, const EVP_MD *md,
 196                                                 const EVP_MD *mgf1md);
 197
 198 #endif /* OSSL_CRYPTO_RSA_LOCAL_H */