include/internal/ffc.h

   1 /*
   2  * Copyright 2019-2020 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_INTERNAL_FFC_H
  11 # define OSSL_INTERNAL_FFC_H
  12
  13 # include <openssl/core.h>
  14 # include <openssl/bn.h>
  15 # include <openssl/evp.h>
  16 # include <openssl/dh.h> /* Uses Error codes from DH */
  17
  18 /* Default value for gindex when canonical generation of g is not used */
  19 # define FFC_UNVERIFIABLE_GINDEX -1
  20
  21 /* The different types of FFC keys */
  22 # define FFC_PARAM_TYPE_DSA  0
  23 # define FFC_PARAM_TYPE_DH   1
  24
  25 /* Return codes for generation and validation of FFC parameters */
  26 #define FFC_PARAMS_RET_STATUS_FAILED         0
  27 #define FFC_PARAMS_RET_STATUS_SUCCESS        1
  28 /* Returned if validating and g is only partially verifiable */
  29 #define FFC_PARAMS_RET_STATUS_UNVERIFIABLE_G 2
  30
  31 /* Validation flags */
  32 # define FFC_PARAMS_GENERATE     0x00
  33 # define FFC_PARAMS_VALIDATE_PQ  0x01
  34 # define FFC_PARAMS_VALIDATE_G   0x02
  35 # define FFC_PARAMS_VALIDATE_ALL (FFC_PARAMS_VALIDATE_PQ | FFC_PARAMS_VALIDATE_G)
  36
  37 /*
  38  * NB: These values must align with the equivalently named macros in
  39  * openssl/dh.h. We cannot use those macros here in case DH has been disabled.
  40  */
  41 # define FFC_CHECK_P_NOT_PRIME                0x00001
  42 # define FFC_CHECK_P_NOT_SAFE_PRIME           0x00002
  43 # define FFC_CHECK_UNKNOWN_GENERATOR          0x00004
  44 # define FFC_CHECK_NOT_SUITABLE_GENERATOR     0x00008
  45 # define FFC_CHECK_Q_NOT_PRIME                0x00010
  46 # define FFC_CHECK_INVALID_Q_VALUE            0x00020
  47 # define FFC_CHECK_INVALID_J_VALUE            0x00040
  48
  49 # define FFC_CHECK_BAD_LN_PAIR                0x00080
  50 # define FFC_CHECK_INVALID_SEED_SIZE          0x00100
  51 # define FFC_CHECK_MISSING_SEED_OR_COUNTER    0x00200
  52 # define FFC_CHECK_INVALID_G                  0x00400
  53 # define FFC_CHECK_INVALID_PQ                 0x00800
  54 # define FFC_CHECK_INVALID_COUNTER            0x01000
  55 # define FFC_CHECK_P_MISMATCH                 0x02000
  56 # define FFC_CHECK_Q_MISMATCH                 0x04000
  57 # define FFC_CHECK_G_MISMATCH                 0x08000
  58 # define FFC_CHECK_COUNTER_MISMATCH           0x10000
  59
  60 /* Validation Return codes */
  61 # define FFC_ERROR_PUBKEY_TOO_SMALL       0x01
  62 # define FFC_ERROR_PUBKEY_TOO_LARGE       0x02
  63 # define FFC_ERROR_PUBKEY_INVALID         0x04
  64 # define FFC_ERROR_NOT_SUITABLE_GENERATOR 0x08
  65 # define FFC_ERROR_PRIVKEY_TOO_SMALL      0x10
  66 # define FFC_ERROR_PRIVKEY_TOO_LARGE      0x20
  67
  68 /*
  69  * Finite field cryptography (FFC) domain parameters are used by DH and DSA.
  70  * Refer to FIPS186_4 Appendix A & B.
  71  */
  72 typedef struct ffc_params_st {
  73     /* Primes */
  74     BIGNUM *p;
  75     BIGNUM *q;
  76     /* Generator */
  77     BIGNUM *g;
  78     /* DH X9.42 Optional Subgroup factor j >= 2 where p = j * q + 1 */
  79     BIGNUM *j;
  80
  81     /* Required for FIPS186_4 validation of p, q and optionally canonical g */
  82     unsigned char *seed;
  83     /* If this value is zero the hash size is used as the seed length */
  84     size_t seedlen;
  85     /* Required for FIPS186_4 validation of p and q */
  86     int pcounter;
  87     int nid; /* The identity of a named group */
  88
  89     /*
  90      * Required for FIPS186_4 generation & validation of canonical g.
  91      * It uses unverifiable g if this value is -1.
  92      */
  93     int gindex;
  94     int h; /* loop counter for unverifiable g */
  95 } FFC_PARAMS;
  96
  97 void ffc_params_init(FFC_PARAMS *params);
  98 void ffc_params_cleanup(FFC_PARAMS *params);
  99 void ffc_params_set0_pqg(FFC_PARAMS *params, BIGNUM *p, BIGNUM *q, BIGNUM *g);
 100 void ffc_params_get0_pqg(const FFC_PARAMS *params, const BIGNUM **p,
 101                          const BIGNUM **q, const BIGNUM **g);
 102 void ffc_params_set0_j(FFC_PARAMS *d, BIGNUM *j);
 103 int ffc_params_set_validate_params(FFC_PARAMS *params,
 104                                    const unsigned char *seed, size_t seedlen,
 105                                    int counter);
 106 void ffc_params_get_validate_params(const FFC_PARAMS *params,
 107                                     unsigned char **seed, size_t *seedlen,
 108                                     int *pcounter);
 109
 110 int ffc_params_copy(FFC_PARAMS *dst, const FFC_PARAMS *src);
 111 int ffc_params_cmp(const FFC_PARAMS *a, const FFC_PARAMS *b, int ignore_q);
 112
 113 #ifndef FIPS_MODE
 114 int ffc_params_print(BIO *bp, const FFC_PARAMS *ffc, int indent);
 115 #endif /* FIPS_MODE */
 116
 117
 118 int ffc_params_FIPS186_4_generate(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 119                                   int type, size_t L, size_t N,
 120                                   const EVP_MD *evpmd, int *res, BN_GENCB *cb);
 121 int ffc_params_FIPS186_2_generate(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 122                                   int type, size_t L, size_t N,
 123                                   const EVP_MD *evpmd, int *res, BN_GENCB *cb);
 124
 125 int ffc_params_FIPS186_4_gen_verify(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 126                                     int type, size_t L, size_t N,
 127                                     const EVP_MD *evpmd, int validate_flags,
 128                                     int *res, BN_GENCB *cb);
 129 int ffc_params_FIPS186_2_gen_verify(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 130                                     int type, size_t L, size_t N,
 131                                     const EVP_MD *evpmd, int validate_flags,
 132                                     int *res, BN_GENCB *cb);
 133
 134 int ffc_params_FIPS186_4_validate(const FFC_PARAMS *params, int type,
 135                                   const EVP_MD *evpmd, int validate_flags,
 136                                   int *res, BN_GENCB *cb);
 137 int ffc_params_FIPS186_2_validate(const FFC_PARAMS *params, int type,
 138                                   const EVP_MD *evpmd, int validate_flags,
 139                                   int *res, BN_GENCB *cb);
 140
 141
 142 int ffc_generate_private_key(BN_CTX *ctx, const FFC_PARAMS *params,
 143                              int N, int s, BIGNUM *priv);
 144 int ffc_generate_private_key_fips(BN_CTX *ctx, const FFC_PARAMS *params,
 145                                   int N, int s, BIGNUM *priv);
 146
 147 int ffc_params_validate_unverifiable_g(BN_CTX *ctx, BN_MONT_CTX *mont,
 148                                        const BIGNUM *p, const BIGNUM *q,
 149                                        const BIGNUM *g, BIGNUM *tmp, int *ret);
 150
 151 int ffc_validate_public_key(const FFC_PARAMS *params, const BIGNUM *pub_key,
 152                             int *ret);
 153 int ffc_validate_public_key_partial(const FFC_PARAMS *params,
 154                                     const BIGNUM *pub_key, int *ret);
 155 int ffc_validate_private_key(const BIGNUM *upper, const BIGNUM *priv_key,
 156                              int *ret);
 157
 158 int ffc_fromdata(FFC_PARAMS *ffc, const OSSL_PARAM params[]);
 159
 160 #endif /* OSSL_INTERNAL_FFC_H */