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 # include <openssl/params.h>
  18 # include <openssl/param_build.h>
  19
  20 /* Default value for gindex when canonical generation of g is not used */
  21 # define FFC_UNVERIFIABLE_GINDEX -1
  22
  23 /* The different types of FFC keys */
  24 # define FFC_PARAM_TYPE_DSA  0
  25 # define FFC_PARAM_TYPE_DH   1
  26
  27 /* Return codes for generation and validation of FFC parameters */
  28 #define FFC_PARAMS_RET_STATUS_FAILED         0
  29 #define FFC_PARAMS_RET_STATUS_SUCCESS        1
  30 /* Returned if validating and g is only partially verifiable */
  31 #define FFC_PARAMS_RET_STATUS_UNVERIFIABLE_G 2
  32
  33 /* Validation flags */
  34 # define FFC_PARAMS_GENERATE     0x00
  35 # define FFC_PARAMS_VALIDATE_PQ  0x01
  36 # define FFC_PARAMS_VALIDATE_G   0x02
  37 # define FFC_PARAMS_VALIDATE_ALL (FFC_PARAMS_VALIDATE_PQ | FFC_PARAMS_VALIDATE_G)
  38
  39 /*
  40  * NB: These values must align with the equivalently named macros in
  41  * openssl/dh.h. We cannot use those macros here in case DH has been disabled.
  42  */
  43 # define FFC_CHECK_P_NOT_PRIME                0x00001
  44 # define FFC_CHECK_P_NOT_SAFE_PRIME           0x00002
  45 # define FFC_CHECK_UNKNOWN_GENERATOR          0x00004
  46 # define FFC_CHECK_NOT_SUITABLE_GENERATOR     0x00008
  47 # define FFC_CHECK_Q_NOT_PRIME                0x00010
  48 # define FFC_CHECK_INVALID_Q_VALUE            0x00020
  49 # define FFC_CHECK_INVALID_J_VALUE            0x00040
  50
  51 # define FFC_CHECK_BAD_LN_PAIR                0x00080
  52 # define FFC_CHECK_INVALID_SEED_SIZE          0x00100
  53 # define FFC_CHECK_MISSING_SEED_OR_COUNTER    0x00200
  54 # define FFC_CHECK_INVALID_G                  0x00400
  55 # define FFC_CHECK_INVALID_PQ                 0x00800
  56 # define FFC_CHECK_INVALID_COUNTER            0x01000
  57 # define FFC_CHECK_P_MISMATCH                 0x02000
  58 # define FFC_CHECK_Q_MISMATCH                 0x04000
  59 # define FFC_CHECK_G_MISMATCH                 0x08000
  60 # define FFC_CHECK_COUNTER_MISMATCH           0x10000
  61
  62 /* Validation Return codes */
  63 # define FFC_ERROR_PUBKEY_TOO_SMALL       0x01
  64 # define FFC_ERROR_PUBKEY_TOO_LARGE       0x02
  65 # define FFC_ERROR_PUBKEY_INVALID         0x04
  66 # define FFC_ERROR_NOT_SUITABLE_GENERATOR 0x08
  67 # define FFC_ERROR_PRIVKEY_TOO_SMALL      0x10
  68 # define FFC_ERROR_PRIVKEY_TOO_LARGE      0x20
  69
  70 /*
  71  * Finite field cryptography (FFC) domain parameters are used by DH and DSA.
  72  * Refer to FIPS186_4 Appendix A & B.
  73  */
  74 typedef struct ffc_params_st {
  75     /* Primes */
  76     BIGNUM *p;
  77     BIGNUM *q;
  78     /* Generator */
  79     BIGNUM *g;
  80     /* DH X9.42 Optional Subgroup factor j >= 2 where p = j * q + 1 */
  81     BIGNUM *j;
  82
  83     /* Required for FIPS186_4 validation of p, q and optionally canonical g */
  84     unsigned char *seed;
  85     /* If this value is zero the hash size is used as the seed length */
  86     size_t seedlen;
  87     /* Required for FIPS186_4 validation of p and q */
  88     int pcounter;
  89     int nid; /* The identity of a named group */
  90
  91     /*
  92      * Required for FIPS186_4 generation & validation of canonical g.
  93      * It uses unverifiable g if this value is -1.
  94      */
  95     int gindex;
  96     int h; /* loop counter for unverifiable g */
  97 } FFC_PARAMS;
  98
  99 void ffc_params_init(FFC_PARAMS *params);
 100 void ffc_params_cleanup(FFC_PARAMS *params);
 101 void ffc_params_set0_pqg(FFC_PARAMS *params, BIGNUM *p, BIGNUM *q, BIGNUM *g);
 102 void ffc_params_get0_pqg(const FFC_PARAMS *params, const BIGNUM **p,
 103                          const BIGNUM **q, const BIGNUM **g);
 104 void ffc_params_set0_j(FFC_PARAMS *d, BIGNUM *j);
 105 int ffc_params_set_seed(FFC_PARAMS *params,
 106                         const unsigned char *seed, size_t seedlen);
 107 void ffc_params_set_gindex(FFC_PARAMS *params, int index);
 108 void ffc_params_set_pcounter(FFC_PARAMS *params, int index);
 109 void ffc_params_set_h(FFC_PARAMS *params, int index);
 110
 111 int ffc_params_set_validate_params(FFC_PARAMS *params,
 112                                    const unsigned char *seed, size_t seedlen,
 113                                    int counter);
 114 void ffc_params_get_validate_params(const FFC_PARAMS *params,
 115                                     unsigned char **seed, size_t *seedlen,
 116                                     int *pcounter);
 117
 118 int ffc_params_copy(FFC_PARAMS *dst, const FFC_PARAMS *src);
 119 int ffc_params_cmp(const FFC_PARAMS *a, const FFC_PARAMS *b, int ignore_q);
 120
 121 #ifndef FIPS_MODE
 122 int ffc_params_print(BIO *bp, const FFC_PARAMS *ffc, int indent);
 123 #endif /* FIPS_MODE */
 124
 125
 126 int ffc_params_FIPS186_4_generate(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 127                                   int type, size_t L, size_t N,
 128                                   const EVP_MD *evpmd, int *res, BN_GENCB *cb);
 129 int ffc_params_FIPS186_2_generate(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 130                                   int type, size_t L, size_t N,
 131                                   const EVP_MD *evpmd, int *res, BN_GENCB *cb);
 132
 133 int ffc_params_FIPS186_4_gen_verify(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 134                                     int type, size_t L, size_t N,
 135                                     const EVP_MD *evpmd, int validate_flags,
 136                                     int *res, BN_GENCB *cb);
 137 int ffc_params_FIPS186_2_gen_verify(OPENSSL_CTX *libctx, FFC_PARAMS *params,
 138                                     int type, size_t L, size_t N,
 139                                     const EVP_MD *evpmd, int validate_flags,
 140                                     int *res, BN_GENCB *cb);
 141
 142 int ffc_params_FIPS186_4_validate(const FFC_PARAMS *params, int type,
 143                                   const EVP_MD *evpmd, int validate_flags,
 144                                   int *res, BN_GENCB *cb);
 145 int ffc_params_FIPS186_2_validate(const FFC_PARAMS *params, int type,
 146                                   const EVP_MD *evpmd, int validate_flags,
 147                                   int *res, BN_GENCB *cb);
 148
 149
 150 int ffc_generate_private_key(BN_CTX *ctx, const FFC_PARAMS *params,
 151                              int N, int s, BIGNUM *priv);
 152
 153 int ffc_params_validate_unverifiable_g(BN_CTX *ctx, BN_MONT_CTX *mont,
 154                                        const BIGNUM *p, const BIGNUM *q,
 155                                        const BIGNUM *g, BIGNUM *tmp, int *ret);
 156
 157 int ffc_validate_public_key(const FFC_PARAMS *params, const BIGNUM *pub_key,
 158                             int *ret);
 159 int ffc_validate_public_key_partial(const FFC_PARAMS *params,
 160                                     const BIGNUM *pub_key, int *ret);
 161 int ffc_validate_private_key(const BIGNUM *upper, const BIGNUM *priv_key,
 162                              int *ret);
 163
 164 int ffc_params_todata(const FFC_PARAMS *ffc, OSSL_PARAM_BLD *tmpl,
 165                       OSSL_PARAM params[]);
 166 int ffc_params_fromdata(FFC_PARAMS *ffc, const OSSL_PARAM params[]);
 167 int ffc_set_group_pqg(FFC_PARAMS *ffc, const char *group_name);
 168 int ffc_named_group_to_uid(const char *name);
 169 const char *ffc_named_group_from_uid(int nid);
 170 int ffc_set_group_pqg(FFC_PARAMS *ffc, const char *group_name);
 171
 172 #endif /* OSSL_INTERNAL_FFC_H */