| 1 | /*
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| 2 | * Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #ifndef OSSL_INTERNAL_FFC_H
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| 11 | # define OSSL_INTERNAL_FFC_H
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| 12 | # ifndef RT_WITHOUT_PRAGMA_ONCE /* VBOX */
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| 13 | # pragma once
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| 14 | # endif /* VBOX */
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| 15 |
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| 16 | # include <openssl/core.h>
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| 17 | # include <openssl/bn.h>
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| 18 | # include <openssl/evp.h>
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| 19 | # include <openssl/dh.h> /* Uses Error codes from DH */
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| 20 | # include <openssl/params.h>
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| 21 | # include <openssl/param_build.h>
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| 22 | # include "internal/sizes.h"
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| 23 |
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| 24 | /* Default value for gindex when canonical generation of g is not used */
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| 25 | # define FFC_UNVERIFIABLE_GINDEX -1
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| 26 |
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| 27 | /* The different types of FFC keys */
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| 28 | # define FFC_PARAM_TYPE_DSA 0
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| 29 | # define FFC_PARAM_TYPE_DH 1
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| 30 |
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| 31 | /*
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| 32 | * The mode used by functions that share code for both generation and
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| 33 | * verification. See ossl_ffc_params_FIPS186_4_gen_verify().
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| 34 | */
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| 35 | #define FFC_PARAM_MODE_VERIFY 0
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| 36 | #define FFC_PARAM_MODE_GENERATE 1
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| 37 |
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| 38 | /* Return codes for generation and validation of FFC parameters */
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| 39 | #define FFC_PARAM_RET_STATUS_FAILED 0
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| 40 | #define FFC_PARAM_RET_STATUS_SUCCESS 1
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| 41 | /* Returned if validating and g is only partially verifiable */
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| 42 | #define FFC_PARAM_RET_STATUS_UNVERIFIABLE_G 2
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| 43 |
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| 44 | /* Validation flags */
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| 45 | # define FFC_PARAM_FLAG_VALIDATE_PQ 0x01
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| 46 | # define FFC_PARAM_FLAG_VALIDATE_G 0x02
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| 47 | # define FFC_PARAM_FLAG_VALIDATE_PQG \
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| 48 | (FFC_PARAM_FLAG_VALIDATE_PQ | FFC_PARAM_FLAG_VALIDATE_G)
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| 49 | #define FFC_PARAM_FLAG_VALIDATE_LEGACY 0x04
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| 50 |
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| 51 | /*
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| 52 | * NB: These values must align with the equivalently named macros in
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| 53 | * openssl/dh.h. We cannot use those macros here in case DH has been disabled.
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| 54 | */
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| 55 | # define FFC_CHECK_P_NOT_PRIME 0x00001
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| 56 | # define FFC_CHECK_P_NOT_SAFE_PRIME 0x00002
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| 57 | # define FFC_CHECK_UNKNOWN_GENERATOR 0x00004
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| 58 | # define FFC_CHECK_NOT_SUITABLE_GENERATOR 0x00008
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| 59 | # define FFC_CHECK_Q_NOT_PRIME 0x00010
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| 60 | # define FFC_CHECK_INVALID_Q_VALUE 0x00020
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| 61 | # define FFC_CHECK_INVALID_J_VALUE 0x00040
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| 62 |
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| 63 | # define FFC_CHECK_BAD_LN_PAIR 0x00080
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| 64 | # define FFC_CHECK_INVALID_SEED_SIZE 0x00100
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| 65 | # define FFC_CHECK_MISSING_SEED_OR_COUNTER 0x00200
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| 66 | # define FFC_CHECK_INVALID_G 0x00400
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| 67 | # define FFC_CHECK_INVALID_PQ 0x00800
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| 68 | # define FFC_CHECK_INVALID_COUNTER 0x01000
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| 69 | # define FFC_CHECK_P_MISMATCH 0x02000
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| 70 | # define FFC_CHECK_Q_MISMATCH 0x04000
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| 71 | # define FFC_CHECK_G_MISMATCH 0x08000
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| 72 | # define FFC_CHECK_COUNTER_MISMATCH 0x10000
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| 73 |
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| 74 | /* Validation Return codes */
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| 75 | # define FFC_ERROR_PUBKEY_TOO_SMALL 0x01
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| 76 | # define FFC_ERROR_PUBKEY_TOO_LARGE 0x02
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| 77 | # define FFC_ERROR_PUBKEY_INVALID 0x04
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| 78 | # define FFC_ERROR_NOT_SUITABLE_GENERATOR 0x08
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| 79 | # define FFC_ERROR_PRIVKEY_TOO_SMALL 0x10
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| 80 | # define FFC_ERROR_PRIVKEY_TOO_LARGE 0x20
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| 81 | # define FFC_ERROR_PASSED_NULL_PARAM 0x40
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| 82 |
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| 83 | /*
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| 84 | * Finite field cryptography (FFC) domain parameters are used by DH and DSA.
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| 85 | * Refer to FIPS186_4 Appendix A & B.
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| 86 | */
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| 87 | typedef struct ffc_params_st {
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| 88 | /* Primes */
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| 89 | BIGNUM *p;
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| 90 | BIGNUM *q;
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| 91 | /* Generator */
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| 92 | BIGNUM *g;
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| 93 | /* DH X9.42 Optional Subgroup factor j >= 2 where p = j * q + 1 */
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| 94 | BIGNUM *j;
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| 95 |
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| 96 | /* Required for FIPS186_4 validation of p, q and optionally canonical g */
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| 97 | unsigned char *seed;
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| 98 | /* If this value is zero the hash size is used as the seed length */
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| 99 | size_t seedlen;
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| 100 | /* Required for FIPS186_4 validation of p and q */
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| 101 | int pcounter;
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| 102 | int nid; /* The identity of a named group */
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| 103 |
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| 104 | /*
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| 105 | * Required for FIPS186_4 generation & validation of canonical g.
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| 106 | * It uses unverifiable g if this value is -1.
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| 107 | */
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| 108 | int gindex;
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| 109 | int h; /* loop counter for unverifiable g */
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| 110 |
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| 111 | unsigned int flags;
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| 112 | /*
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| 113 | * The digest to use for generation or validation. If this value is NULL,
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| 114 | * then the digest is chosen using the value of N.
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| 115 | */
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| 116 | const char *mdname;
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| 117 | const char *mdprops;
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| 118 | /* Default key length for known named groups according to RFC7919 */
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| 119 | int keylength;
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| 120 | } FFC_PARAMS;
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| 121 |
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| 122 | void ossl_ffc_params_init(FFC_PARAMS *params);
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| 123 | void ossl_ffc_params_cleanup(FFC_PARAMS *params);
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| 124 | void ossl_ffc_params_set0_pqg(FFC_PARAMS *params, BIGNUM *p, BIGNUM *q,
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| 125 | BIGNUM *g);
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| 126 | void ossl_ffc_params_get0_pqg(const FFC_PARAMS *params, const BIGNUM **p,
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| 127 | const BIGNUM **q, const BIGNUM **g);
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| 128 | void ossl_ffc_params_set0_j(FFC_PARAMS *d, BIGNUM *j);
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| 129 | int ossl_ffc_params_set_seed(FFC_PARAMS *params,
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| 130 | const unsigned char *seed, size_t seedlen);
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| 131 | void ossl_ffc_params_set_gindex(FFC_PARAMS *params, int index);
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| 132 | void ossl_ffc_params_set_pcounter(FFC_PARAMS *params, int index);
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| 133 | void ossl_ffc_params_set_h(FFC_PARAMS *params, int index);
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| 134 | void ossl_ffc_params_set_flags(FFC_PARAMS *params, unsigned int flags);
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| 135 | void ossl_ffc_params_enable_flags(FFC_PARAMS *params, unsigned int flags,
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| 136 | int enable);
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| 137 | int ossl_ffc_set_digest(FFC_PARAMS *params, const char *alg, const char *props);
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| 138 |
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| 139 | int ossl_ffc_params_set_validate_params(FFC_PARAMS *params,
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| 140 | const unsigned char *seed,
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| 141 | size_t seedlen, int counter);
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| 142 | void ossl_ffc_params_get_validate_params(const FFC_PARAMS *params,
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| 143 | unsigned char **seed, size_t *seedlen,
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| 144 | int *pcounter);
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| 145 |
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| 146 | int ossl_ffc_params_copy(FFC_PARAMS *dst, const FFC_PARAMS *src);
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| 147 | int ossl_ffc_params_cmp(const FFC_PARAMS *a, const FFC_PARAMS *b, int ignore_q);
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| 148 |
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| 149 | #ifndef FIPS_MODULE
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| 150 | int ossl_ffc_params_print(BIO *bp, const FFC_PARAMS *ffc, int indent);
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| 151 | #endif /* FIPS_MODULE */
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| 152 |
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| 153 |
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| 154 | int ossl_ffc_params_FIPS186_4_generate(OSSL_LIB_CTX *libctx, FFC_PARAMS *params,
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| 155 | int type, size_t L, size_t N,
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| 156 | int *res, BN_GENCB *cb);
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| 157 | int ossl_ffc_params_FIPS186_2_generate(OSSL_LIB_CTX *libctx, FFC_PARAMS *params,
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| 158 | int type, size_t L, size_t N,
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| 159 | int *res, BN_GENCB *cb);
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| 160 |
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| 161 | int ossl_ffc_params_FIPS186_4_gen_verify(OSSL_LIB_CTX *libctx,
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| 162 | FFC_PARAMS *params, int mode, int type,
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| 163 | size_t L, size_t N, int *res,
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| 164 | BN_GENCB *cb);
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| 165 | int ossl_ffc_params_FIPS186_2_gen_verify(OSSL_LIB_CTX *libctx,
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| 166 | FFC_PARAMS *params, int mode, int type,
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| 167 | size_t L, size_t N, int *res,
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| 168 | BN_GENCB *cb);
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| 169 |
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| 170 | int ossl_ffc_params_simple_validate(OSSL_LIB_CTX *libctx,
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| 171 | const FFC_PARAMS *params,
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| 172 | int paramstype, int *res);
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| 173 | int ossl_ffc_params_full_validate(OSSL_LIB_CTX *libctx,
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| 174 | const FFC_PARAMS *params,
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| 175 | int paramstype, int *res);
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| 176 | int ossl_ffc_params_FIPS186_4_validate(OSSL_LIB_CTX *libctx,
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| 177 | const FFC_PARAMS *params,
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| 178 | int type, int *res, BN_GENCB *cb);
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| 179 | int ossl_ffc_params_FIPS186_2_validate(OSSL_LIB_CTX *libctx,
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| 180 | const FFC_PARAMS *params,
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| 181 | int type, int *res, BN_GENCB *cb);
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| 182 |
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| 183 | int ossl_ffc_generate_private_key(BN_CTX *ctx, const FFC_PARAMS *params,
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| 184 | int N, int s, BIGNUM *priv);
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| 185 |
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| 186 | int ossl_ffc_params_validate_unverifiable_g(BN_CTX *ctx, BN_MONT_CTX *mont,
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| 187 | const BIGNUM *p, const BIGNUM *q,
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| 188 | const BIGNUM *g, BIGNUM *tmp,
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| 189 | int *ret);
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| 190 |
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| 191 | int ossl_ffc_validate_public_key(const FFC_PARAMS *params,
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| 192 | const BIGNUM *pub_key, int *ret);
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| 193 | int ossl_ffc_validate_public_key_partial(const FFC_PARAMS *params,
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| 194 | const BIGNUM *pub_key, int *ret);
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| 195 | int ossl_ffc_validate_private_key(const BIGNUM *upper, const BIGNUM *priv_key,
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| 196 | int *ret);
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| 197 |
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| 198 | int ossl_ffc_params_todata(const FFC_PARAMS *ffc, OSSL_PARAM_BLD *tmpl,
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| 199 | OSSL_PARAM params[]);
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| 200 | int ossl_ffc_params_fromdata(FFC_PARAMS *ffc, const OSSL_PARAM params[]);
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| 201 |
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| 202 | typedef struct dh_named_group_st DH_NAMED_GROUP;
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| 203 | const DH_NAMED_GROUP *ossl_ffc_name_to_dh_named_group(const char *name);
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| 204 | const DH_NAMED_GROUP *ossl_ffc_uid_to_dh_named_group(int uid);
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| 205 | #ifndef OPENSSL_NO_DH
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| 206 | const DH_NAMED_GROUP *ossl_ffc_numbers_to_dh_named_group(const BIGNUM *p,
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| 207 | const BIGNUM *q,
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| 208 | const BIGNUM *g);
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| 209 | #endif
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| 210 | int ossl_ffc_named_group_get_uid(const DH_NAMED_GROUP *group);
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| 211 | const char *ossl_ffc_named_group_get_name(const DH_NAMED_GROUP *);
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| 212 | #ifndef OPENSSL_NO_DH
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| 213 | int ossl_ffc_named_group_get_keylength(const DH_NAMED_GROUP *group);
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| 214 | const BIGNUM *ossl_ffc_named_group_get_q(const DH_NAMED_GROUP *group);
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| 215 | int ossl_ffc_named_group_set(FFC_PARAMS *ffc, const DH_NAMED_GROUP *group);
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| 216 | #endif
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| 217 |
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| 218 | #endif /* OSSL_INTERNAL_FFC_H */
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