1 /* $OpenBSD: rsa_local.h,v 1.8 2024/01/01 15:43:02 tb Exp $ */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 __BEGIN_HIDDEN_DECLS 60 61 #define RSA_MIN_MODULUS_BITS 512 62 63 struct rsa_meth_st { 64 char *name; 65 int (*rsa_pub_enc)(int flen, const unsigned char *from, 66 unsigned char *to, RSA *rsa, int padding); 67 int (*rsa_pub_dec)(int flen, const unsigned char *from, 68 unsigned char *to, RSA *rsa, int padding); 69 int (*rsa_priv_enc)(int flen, const unsigned char *from, 70 unsigned char *to, RSA *rsa, int padding); 71 int (*rsa_priv_dec)(int flen, const unsigned char *from, 72 unsigned char *to, RSA *rsa, int padding); 73 int (*rsa_mod_exp)(BIGNUM *r0, const BIGNUM *I, RSA *rsa, 74 BN_CTX *ctx); /* Can be null */ 75 int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 76 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); /* Can be null */ 77 int (*init)(RSA *rsa); /* called at new */ 78 int (*finish)(RSA *rsa); /* called at free */ 79 int flags; /* RSA_METHOD_FLAG_* things */ 80 char *app_data; /* may be needed! */ 81 /* New sign and verify functions: some libraries don't allow arbitrary data 82 * to be signed/verified: this allows them to be used. Note: for this to work 83 * the RSA_public_decrypt() and RSA_private_encrypt() should *NOT* be used 84 * RSA_sign(), RSA_verify() should be used instead. Note: for backwards 85 * compatibility this functionality is only enabled if the RSA_FLAG_SIGN_VER 86 * option is set in 'flags'. 87 */ 88 int (*rsa_sign)(int type, const unsigned char *m, unsigned int m_length, 89 unsigned char *sigret, unsigned int *siglen, const RSA *rsa); 90 int (*rsa_verify)(int dtype, const unsigned char *m, 91 unsigned int m_length, const unsigned char *sigbuf, 92 unsigned int siglen, const RSA *rsa); 93 /* If this callback is NULL, the builtin software RSA key-gen will be used. This 94 * is for behavioural compatibility whilst the code gets rewired, but one day 95 * it would be nice to assume there are no such things as "builtin software" 96 * implementations. */ 97 int (*rsa_keygen)(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb); 98 }; 99 100 struct rsa_st { 101 /* The first parameter is used to pickup errors where 102 * this is passed instead of aEVP_PKEY, it is set to 0 */ 103 int pad; 104 long version; 105 const RSA_METHOD *meth; 106 107 BIGNUM *n; 108 BIGNUM *e; 109 BIGNUM *d; 110 BIGNUM *p; 111 BIGNUM *q; 112 BIGNUM *dmp1; 113 BIGNUM *dmq1; 114 BIGNUM *iqmp; 115 116 /* Parameter restrictions for PSS only keys. */ 117 RSA_PSS_PARAMS *pss; 118 119 /* be careful using this if the RSA structure is shared */ 120 CRYPTO_EX_DATA ex_data; 121 int references; 122 int flags; 123 124 /* Used to cache montgomery values */ 125 BN_MONT_CTX *_method_mod_n; 126 BN_MONT_CTX *_method_mod_p; 127 BN_MONT_CTX *_method_mod_q; 128 129 /* all BIGNUM values are actually in the following data, if it is not 130 * NULL */ 131 BN_BLINDING *blinding; 132 BN_BLINDING *mt_blinding; 133 }; 134 135 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd, const EVP_MD *mgf1md, 136 int saltlen); 137 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd, 138 const EVP_MD **pmgf1md, int *psaltlen); 139 140 extern int int_rsa_verify(int dtype, const unsigned char *m, 141 unsigned int m_len, unsigned char *rm, size_t *prm_len, 142 const unsigned char *sigbuf, size_t siglen, RSA *rsa); 143 144 int RSA_padding_add_X931(unsigned char *to, int tlen, 145 const unsigned char *f, int fl); 146 int RSA_padding_check_X931(unsigned char *to, int tlen, 147 const unsigned char *f, int fl, int rsa_len); 148 int RSA_X931_hash_id(int nid); 149 150 BN_BLINDING *BN_BLINDING_new(const BIGNUM *e, const BIGNUM *mod, BN_CTX *ctx, 151 int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, 152 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx), BN_MONT_CTX *m_ctx); 153 void BN_BLINDING_free(BN_BLINDING *b); 154 int BN_BLINDING_convert(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *); 155 int BN_BLINDING_invert(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *); 156 int BN_BLINDING_is_local(BN_BLINDING *b); 157 BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx); 158 159 __END_HIDDEN_DECLS 160