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9862e9aa | 1 | /* |
665d899f | 2 | * Copyright 2006-2017 The OpenSSL Project Authors. All Rights Reserved. |
9862e9aa | 3 | * |
2039c421 RS |
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 | |
9862e9aa | 7 | * https://www.openssl.org/source/license.html |
9862e9aa RL |
8 | */ |
9 | ||
10 | #include <openssl/rsa.h> | |
2f545ae4 | 11 | #include "internal/refcount.h" |
9862e9aa | 12 | |
665d899f PY |
13 | #define RSA_MAX_PRIME_NUM 16 |
14 | #define RSA_MIN_PRIME_SIZE 64 | |
cac19d19 | 15 | #define RSA_MIN_MODULUS_BITS 512 |
665d899f PY |
16 | |
17 | typedef struct rsa_prime_info_st { | |
18 | BIGNUM *r; | |
19 | BIGNUM *d; | |
20 | BIGNUM *t; | |
21 | /* save product of primes prior to this one */ | |
22 | BIGNUM *pp; | |
23 | BN_MONT_CTX *m; | |
24 | } RSA_PRIME_INFO; | |
25 | ||
26 | DECLARE_ASN1_ITEM(RSA_PRIME_INFO) | |
27 | DEFINE_STACK_OF(RSA_PRIME_INFO) | |
28 | ||
9862e9aa RL |
29 | struct rsa_st { |
30 | /* | |
31 | * The first parameter is used to pickup errors where this is passed | |
0759f934 | 32 | * instead of an EVP_PKEY, it is set to 0 |
9862e9aa RL |
33 | */ |
34 | int pad; | |
6a32a3c0 | 35 | int32_t version; |
9862e9aa RL |
36 | const RSA_METHOD *meth; |
37 | /* functional reference if 'meth' is ENGINE-provided */ | |
38 | ENGINE *engine; | |
39 | BIGNUM *n; | |
40 | BIGNUM *e; | |
41 | BIGNUM *d; | |
42 | BIGNUM *p; | |
43 | BIGNUM *q; | |
44 | BIGNUM *dmp1; | |
45 | BIGNUM *dmq1; | |
46 | BIGNUM *iqmp; | |
665d899f PY |
47 | /* for multi-prime RSA, defined in RFC 8017 */ |
48 | STACK_OF(RSA_PRIME_INFO) *prime_infos; | |
d771441d DSH |
49 | /* If a PSS only key this contains the parameter restrictions */ |
50 | RSA_PSS_PARAMS *pss; | |
9862e9aa RL |
51 | /* be careful using this if the RSA structure is shared */ |
52 | CRYPTO_EX_DATA ex_data; | |
2f545ae4 | 53 | CRYPTO_REF_COUNT references; |
9862e9aa RL |
54 | int flags; |
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; | |
59 | /* | |
60 | * all BIGNUM values are actually in the following data, if it is not | |
61 | * NULL | |
62 | */ | |
63 | char *bignum_data; | |
64 | BN_BLINDING *blinding; | |
65 | BN_BLINDING *mt_blinding; | |
66 | CRYPTO_RWLOCK *lock; | |
67 | }; | |
68 | ||
b72c9121 RL |
69 | struct rsa_meth_st { |
70 | char *name; | |
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); | |
79 | /* Can be null */ | |
80 | int (*rsa_mod_exp) (BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx); | |
81 | /* Can be null */ | |
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); | |
84 | /* called at new */ | |
85 | int (*init) (RSA *rsa); | |
86 | /* called at free */ | |
87 | int (*finish) (RSA *rsa); | |
88 | /* RSA_METHOD_FLAG_* things */ | |
89 | int flags; | |
90 | /* may be needed! */ | |
91 | char *app_data; | |
92 | /* | |
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. | |
97 | */ | |
98 | int (*rsa_sign) (int type, | |
99 | const unsigned char *m, unsigned int m_length, | |
100 | unsigned char *sigret, unsigned int *siglen, | |
101 | const RSA *rsa); | |
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); | |
105 | /* | |
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. | |
110 | */ | |
111 | int (*rsa_keygen) (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb); | |
665d899f PY |
112 | int (*rsa_multi_prime_keygen) (RSA *rsa, int bits, int primes, |
113 | BIGNUM *e, BN_GENCB *cb); | |
b72c9121 RL |
114 | }; |
115 | ||
0f113f3e MC |
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); | |
87ee7b22 DSH |
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) | |
47e42b3c DSH |
123 | |
124 | RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd, | |
125 | const EVP_MD *mgf1md, int saltlen); | |
cfd81c6d DSH |
126 | int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd, |
127 | const EVP_MD **pmgf1md, int *psaltlen); | |
665d899f PY |
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); | |
0122add6 | 133 | int rsa_multip_cap(int bits); |