crypto/rsa/rsa_local.h

   1 /*
   2  * Copyright 2006-2017 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
  16 #define RSA_MAX_PRIME_NUM       5
  17 #define RSA_MIN_MODULUS_BITS    512
  18
  19 typedef struct rsa_prime_info_st {
  20     BIGNUM *r;
  21     BIGNUM *d;
  22     BIGNUM *t;
  23     /* save product of primes prior to this one */
  24     BIGNUM *pp;
  25     BN_MONT_CTX *m;
  26 } RSA_PRIME_INFO;
  27
  28 DECLARE_ASN1_ITEM(RSA_PRIME_INFO)
  29 DEFINE_STACK_OF(RSA_PRIME_INFO)
  30
  31 struct rsa_st {
  32     OPENSSL_CTX *libctx;
  33
  34     /*
  35      * The first parameter is used to pickup errors where this is passed
  36      * instead of an EVP_PKEY, it is set to 0
  37      */
  38     int pad;
  39     int32_t version;
  40     const RSA_METHOD *meth;
  41     /* functional reference if 'meth' is ENGINE-provided */
  42     ENGINE *engine;
  43     BIGNUM *n;
  44     BIGNUM *e;
  45     BIGNUM *d;
  46     BIGNUM *p;
  47     BIGNUM *q;
  48     BIGNUM *dmp1;
  49     BIGNUM *dmq1;
  50     BIGNUM *iqmp;
  51     /* TODO(3.0): Support PSS in FIPS_MODE */
  52 #ifndef FIPS_MODE
  53     /* for multi-prime RSA, defined in RFC 8017 */
  54     STACK_OF(RSA_PRIME_INFO) *prime_infos;
  55     /* If a PSS only key this contains the parameter restrictions */
  56     RSA_PSS_PARAMS *pss;
  57     /* be careful using this if the RSA structure is shared */
  58     CRYPTO_EX_DATA ex_data;
  59 #endif
  60     CRYPTO_REF_COUNT references;
  61     int flags;
  62     /* Used to cache montgomery values */
  63     BN_MONT_CTX *_method_mod_n;
  64     BN_MONT_CTX *_method_mod_p;
  65     BN_MONT_CTX *_method_mod_q;
  66     /*
  67      * all BIGNUM values are actually in the following data, if it is not
  68      * NULL
  69      */
  70     char *bignum_data;
  71     BN_BLINDING *blinding;
  72     BN_BLINDING *mt_blinding;
  73     CRYPTO_RWLOCK *lock;
  74
  75     int dirty_cnt;
  76 };
  77
  78 struct rsa_meth_st {
  79     char *name;
  80     int (*rsa_pub_enc) (int flen, const unsigned char *from,
  81                         unsigned char *to, RSA *rsa, int padding);
  82     int (*rsa_pub_dec) (int flen, const unsigned char *from,
  83                         unsigned char *to, RSA *rsa, int padding);
  84     int (*rsa_priv_enc) (int flen, const unsigned char *from,
  85                          unsigned char *to, RSA *rsa, int padding);
  86     int (*rsa_priv_dec) (int flen, const unsigned char *from,
  87                          unsigned char *to, RSA *rsa, int padding);
  88     /* Can be null */
  89     int (*rsa_mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
  90     /* Can be null */
  91     int (*bn_mod_exp) (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
  92                        const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
  93     /* called at new */
  94     int (*init) (RSA *rsa);
  95     /* called at free */
  96     int (*finish) (RSA *rsa);
  97     /* RSA_METHOD_FLAG_* things */
  98     int flags;
  99     /* may be needed! */
 100     char *app_data;
 101     /*
 102      * New sign and verify functions: some libraries don't allow arbitrary
 103      * data to be signed/verified: this allows them to be used. Note: for
 104      * this to work the RSA_public_decrypt() and RSA_private_encrypt() should
 105      * *NOT* be used RSA_sign(), RSA_verify() should be used instead.
 106      */
 107     int (*rsa_sign) (int type,
 108                      const unsigned char *m, unsigned int m_length,
 109                      unsigned char *sigret, unsigned int *siglen,
 110                      const RSA *rsa);
 111     int (*rsa_verify) (int dtype, const unsigned char *m,
 112                        unsigned int m_length, const unsigned char *sigbuf,
 113                        unsigned int siglen, const RSA *rsa);
 114     /*
 115      * If this callback is NULL, the builtin software RSA key-gen will be
 116      * used. This is for behavioural compatibility whilst the code gets
 117      * rewired, but one day it would be nice to assume there are no such
 118      * things as "builtin software" implementations.
 119      */
 120     int (*rsa_keygen) (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
 121     int (*rsa_multi_prime_keygen) (RSA *rsa, int bits, int primes,
 122                                    BIGNUM *e, BN_GENCB *cb);
 123 };
 124
 125 extern int int_rsa_verify(int dtype, const unsigned char *m,
 126                           unsigned int m_len, unsigned char *rm,
 127                           size_t *prm_len, const unsigned char *sigbuf,
 128                           size_t siglen, RSA *rsa);
 129 /* Macros to test if a pkey or ctx is for a PSS key */
 130 #define pkey_is_pss(pkey) (pkey->ameth->pkey_id == EVP_PKEY_RSA_PSS)
 131 #define pkey_ctx_is_pss(ctx) (ctx->pmeth->pkey_id == EVP_PKEY_RSA_PSS)
 132
 133 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
 134                                       const EVP_MD *mgf1md, int saltlen);
 135 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
 136                       const EVP_MD **pmgf1md, int *psaltlen);
 137 /* internal function to clear and free multi-prime parameters */
 138 void rsa_multip_info_free_ex(RSA_PRIME_INFO *pinfo);
 139 void rsa_multip_info_free(RSA_PRIME_INFO *pinfo);
 140 RSA_PRIME_INFO *rsa_multip_info_new(void);
 141 int rsa_multip_calc_product(RSA *rsa);
 142 int rsa_multip_cap(int bits);
 143
 144 uint16_t rsa_compute_security_bits(int n);
 145
 146 int rsa_sp800_56b_validate_strength(int nbits, int strength);
 147 int rsa_check_pminusq_diff(BIGNUM *diff, const BIGNUM *p, const BIGNUM *q,
 148                            int nbits);
 149 int rsa_get_lcm(BN_CTX *ctx, const BIGNUM *p, const BIGNUM *q,
 150                 BIGNUM *lcm, BIGNUM *gcd, BIGNUM *p1, BIGNUM *q1,
 151                 BIGNUM *p1q1);
 152
 153 int rsa_check_public_exponent(const BIGNUM *e);
 154 int rsa_check_private_exponent(const RSA *rsa, int nbits, BN_CTX *ctx);
 155 int rsa_check_prime_factor(BIGNUM *p, BIGNUM *e, int nbits, BN_CTX *ctx);
 156 int rsa_check_prime_factor_range(const BIGNUM *p, int nbits, BN_CTX *ctx);
 157 int rsa_check_crt_components(const RSA *rsa, BN_CTX *ctx);
 158
 159 int rsa_sp800_56b_pairwise_test(RSA *rsa, BN_CTX *ctx);
 160 int rsa_sp800_56b_check_public(const RSA *rsa);
 161 int rsa_sp800_56b_check_private(const RSA *rsa);
 162 int rsa_sp800_56b_check_keypair(const RSA *rsa, const BIGNUM *efixed,
 163                                 int strength, int nbits);
 164 int rsa_sp800_56b_generate_key(RSA *rsa, int nbits, const BIGNUM *efixed,
 165                                BN_GENCB *cb);
 166
 167 int rsa_sp800_56b_derive_params_from_pq(RSA *rsa, int nbits,
 168                                         const BIGNUM *e, BN_CTX *ctx);
 169 int rsa_fips186_4_gen_prob_primes(RSA *rsa, BIGNUM *p1, BIGNUM *p2,
 170                                   BIGNUM *Xpout, const BIGNUM *Xp,
 171                                   const BIGNUM *Xp1, const BIGNUM *Xp2,
 172                                   BIGNUM *q1, BIGNUM *q2, BIGNUM *Xqout,
 173                                   const BIGNUM *Xq, const BIGNUM *Xq1,
 174                                   const BIGNUM *Xq2, int nbits,
 175                                   const BIGNUM *e, BN_CTX *ctx, BN_GENCB *cb);
 176
 177 #endif /* OSSL_CRYPTO_RSA_LOCAL_H */