2 * Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
10 #include <openssl/rsa.h>
11 #include "internal/refcount.h"
13 #define RSA_MAX_PRIME_NUM 16
14 #define RSA_MIN_PRIME_SIZE 64
15 #define RSA_MIN_MODULUS_BITS 512
17 typedef struct rsa_prime_info_st {
21 /* save product of primes prior to this one */
26 DECLARE_ASN1_ITEM(RSA_PRIME_INFO)
27 DEFINE_STACK_OF(RSA_PRIME_INFO)
31 * The first parameter is used to pickup errors where this is passed
32 * instead of an EVP_PKEY, it is set to 0
36 const RSA_METHOD *meth;
37 /* functional reference if 'meth' is ENGINE-provided */
47 /* for multi-prime RSA, defined in RFC 8017 */
48 STACK_OF(RSA_PRIME_INFO) *prime_infos;
49 /* If a PSS only key this contains the parameter restrictions */
51 /* be careful using this if the RSA structure is shared */
52 CRYPTO_EX_DATA ex_data;
53 CRYPTO_REF_COUNT references;
55 /* Used to cache montgomery values */
56 BN_MONT_CTX *_method_mod_n;
57 BN_MONT_CTX *_method_mod_p;
58 BN_MONT_CTX *_method_mod_q;
60 * all BIGNUM values are actually in the following data, if it is not
64 BN_BLINDING *blinding;
65 BN_BLINDING *mt_blinding;
71 int (*rsa_pub_enc) (int flen, const unsigned char *from,
72 unsigned char *to, RSA *rsa, int padding);
73 int (*rsa_pub_dec) (int flen, const unsigned char *from,
74 unsigned char *to, RSA *rsa, int padding);
75 int (*rsa_priv_enc) (int flen, const unsigned char *from,
76 unsigned char *to, RSA *rsa, int padding);
77 int (*rsa_priv_dec) (int flen, const unsigned char *from,
78 unsigned char *to, RSA *rsa, int padding);
80 int (*rsa_mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx);
82 int (*bn_mod_exp) (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
83 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
85 int (*init) (RSA *rsa);
87 int (*finish) (RSA *rsa);
88 /* RSA_METHOD_FLAG_* things */
93 * New sign and verify functions: some libraries don't allow arbitrary
94 * data to be signed/verified: this allows them to be used. Note: for
95 * this to work the RSA_public_decrypt() and RSA_private_encrypt() should
96 * *NOT* be used RSA_sign(), RSA_verify() should be used instead.
98 int (*rsa_sign) (int type,
99 const unsigned char *m, unsigned int m_length,
100 unsigned char *sigret, unsigned int *siglen,
102 int (*rsa_verify) (int dtype, const unsigned char *m,
103 unsigned int m_length, const unsigned char *sigbuf,
104 unsigned int siglen, const RSA *rsa);
106 * If this callback is NULL, the builtin software RSA key-gen will be
107 * used. This is for behavioural compatibility whilst the code gets
108 * rewired, but one day it would be nice to assume there are no such
109 * things as "builtin software" implementations.
111 int (*rsa_keygen) (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
112 int (*rsa_multi_prime_keygen) (RSA *rsa, int bits, int primes,
113 BIGNUM *e, BN_GENCB *cb);
116 extern int int_rsa_verify(int dtype, const unsigned char *m,
117 unsigned int m_len, unsigned char *rm,
118 size_t *prm_len, const unsigned char *sigbuf,
119 size_t siglen, RSA *rsa);
120 /* Macros to test if a pkey or ctx is for a PSS key */
121 #define pkey_is_pss(pkey) (pkey->ameth->pkey_id == EVP_PKEY_RSA_PSS)
122 #define pkey_ctx_is_pss(ctx) (ctx->pmeth->pkey_id == EVP_PKEY_RSA_PSS)
124 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
125 const EVP_MD *mgf1md, int saltlen);
126 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
127 const EVP_MD **pmgf1md, int *psaltlen);
128 /* internal function to clear and free multi-prime parameters */
129 void rsa_multip_info_free_ex(RSA_PRIME_INFO *pinfo);
130 void rsa_multip_info_free(RSA_PRIME_INFO *pinfo);
131 RSA_PRIME_INFO *rsa_multip_info_new(void);
132 int rsa_multip_calc_product(RSA *rsa);
133 int rsa_multip_cap(int bits);