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1/* crypto/rsa/rsa.h */
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#ifndef HEADER_RSA_H
60#define HEADER_RSA_H
61
62#include <openssl/asn1.h>
63
64#ifndef OPENSSL_NO_BIO
65#include <openssl/bio.h>
66#endif
67#include <openssl/bn.h>
68#include <openssl/crypto.h>
69#include <openssl/ossl_typ.h>
70
71#ifdef OPENSSL_NO_RSA
72#error RSA is disabled.
73#endif
74
75#if defined(OPENSSL_FIPS)
76#define FIPS_RSA_SIZE_T int
77#endif
78
79#ifdef __cplusplus
80extern "C" {
81#endif
82
83typedef struct rsa_st RSA;
84
85typedef struct rsa_meth_st
86 {
87 const char *name;
88 int (*rsa_pub_enc)(int flen,const unsigned char *from,
89 unsigned char *to,
90 RSA *rsa,int padding);
91 int (*rsa_pub_dec)(int flen,const unsigned char *from,
92 unsigned char *to,
93 RSA *rsa,int padding);
94 int (*rsa_priv_enc)(int flen,const unsigned char *from,
95 unsigned char *to,
96 RSA *rsa,int padding);
97 int (*rsa_priv_dec)(int flen,const unsigned char *from,
98 unsigned char *to,
99 RSA *rsa,int padding);
100 int (*rsa_mod_exp)(BIGNUM *r0,const BIGNUM *I,RSA *rsa); /* Can be null */
101 int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
102 const BIGNUM *m, BN_CTX *ctx,
103 BN_MONT_CTX *m_ctx); /* Can be null */
104 int (*init)(RSA *rsa); /* called at new */
105 int (*finish)(RSA *rsa); /* called at free */
106 int flags; /* RSA_METHOD_FLAG_* things */
107 char *app_data; /* may be needed! */
108/* New sign and verify functions: some libraries don't allow arbitrary data
109 * to be signed/verified: this allows them to be used. Note: for this to work
110 * the RSA_public_decrypt() and RSA_private_encrypt() should *NOT* be used
111 * RSA_sign(), RSA_verify() should be used instead. Note: for backwards
112 * compatibility this functionality is only enabled if the RSA_FLAG_SIGN_VER
113 * option is set in 'flags'.
114 */
115 int (*rsa_sign)(int type,
116 const unsigned char *m, unsigned int m_length,
117 unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
118 int (*rsa_verify)(int dtype,
119 const unsigned char *m, unsigned int m_length,
120 unsigned char *sigbuf, unsigned int siglen, const RSA *rsa);
121
122 } RSA_METHOD;
123
124struct rsa_st
125 {
126 /* The first parameter is used to pickup errors where
127 * this is passed instead of aEVP_PKEY, it is set to 0 */
128 int pad;
129 long version;
130 const RSA_METHOD *meth;
131 /* functional reference if 'meth' is ENGINE-provided */
132 ENGINE *engine;
133 BIGNUM *n;
134 BIGNUM *e;
135 BIGNUM *d;
136 BIGNUM *p;
137 BIGNUM *q;
138 BIGNUM *dmp1;
139 BIGNUM *dmq1;
140 BIGNUM *iqmp;
141 /* be careful using this if the RSA structure is shared */
142 CRYPTO_EX_DATA ex_data;
143 int references;
144 int flags;
145
146 /* Used to cache montgomery values */
147 BN_MONT_CTX *_method_mod_n;
148 BN_MONT_CTX *_method_mod_p;
149 BN_MONT_CTX *_method_mod_q;
150
151 /* all BIGNUM values are actually in the following data, if it is not
152 * NULL */
153 char *bignum_data;
154 BN_BLINDING *blinding;
155 };
156
157#define RSA_3 0x3L
158#define RSA_F4 0x10001L
159
160#define RSA_METHOD_FLAG_NO_CHECK 0x01 /* don't check pub/private match */
161
162#define RSA_FLAG_CACHE_PUBLIC 0x02
163#define RSA_FLAG_CACHE_PRIVATE 0x04
164#define RSA_FLAG_BLINDING 0x08
165#define RSA_FLAG_THREAD_SAFE 0x10
166/* This flag means the private key operations will be handled by rsa_mod_exp
167 * and that they do not depend on the private key components being present:
168 * for example a key stored in external hardware. Without this flag bn_mod_exp
169 * gets called when private key components are absent.
170 */
171#define RSA_FLAG_EXT_PKEY 0x20
172
173/* This flag in the RSA_METHOD enables the new rsa_sign, rsa_verify functions.
174 */
175#define RSA_FLAG_SIGN_VER 0x40
176
177#define RSA_FLAG_NO_BLINDING 0x80 /* new with 0.9.6j and 0.9.7b; the built-in
178 * RSA implementation now uses blinding by
179 * default (ignoring RSA_FLAG_BLINDING),
180 * but other engines might not need it
181 */
182
183#define RSA_PKCS1_PADDING 1
184#define RSA_SSLV23_PADDING 2
185#define RSA_NO_PADDING 3
186#define RSA_PKCS1_OAEP_PADDING 4
187
188#define RSA_PKCS1_PADDING_SIZE 11
189
190#define RSA_set_app_data(s,arg) RSA_set_ex_data(s,0,arg)
191#define RSA_get_app_data(s) RSA_get_ex_data(s,0)
192
193RSA * RSA_new(void);
194RSA * RSA_new_method(ENGINE *engine);
195int RSA_size(const RSA *);
196RSA * RSA_generate_key(int bits, unsigned long e,void
197 (*callback)(int,int,void *),void *cb_arg);
198int RSA_check_key(const RSA *);
199 /* next 4 return -1 on error */
200int RSA_public_encrypt(int flen, const unsigned char *from,
201 unsigned char *to, RSA *rsa,int padding);
202int RSA_private_encrypt(int flen, const unsigned char *from,
203 unsigned char *to, RSA *rsa,int padding);
204int RSA_public_decrypt(int flen, const unsigned char *from,
205 unsigned char *to, RSA *rsa,int padding);
206int RSA_private_decrypt(int flen, const unsigned char *from,
207 unsigned char *to, RSA *rsa,int padding);
208void RSA_free (RSA *r);
209/* "up" the RSA object's reference count */
210int RSA_up_ref(RSA *r);
211
212int RSA_flags(const RSA *r);
213
214void RSA_set_default_method(const RSA_METHOD *meth);
215const RSA_METHOD *RSA_get_default_method(void);
216const RSA_METHOD *RSA_get_method(const RSA *rsa);
217int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);
218
219/* This function needs the memory locking malloc callbacks to be installed */
220int RSA_memory_lock(RSA *r);
221
222/* these are the actual SSLeay RSA functions */
223const RSA_METHOD *RSA_PKCS1_SSLeay(void);
224
225const RSA_METHOD *RSA_null_method(void);
226
227DECLARE_ASN1_ENCODE_FUNCTIONS_const(RSA, RSAPublicKey)
228DECLARE_ASN1_ENCODE_FUNCTIONS_const(RSA, RSAPrivateKey)
229
230#ifndef OPENSSL_NO_FP_API
231int RSA_print_fp(FILE *fp, const RSA *r,int offset);
232#endif
233
234#ifndef OPENSSL_NO_BIO
235int RSA_print(BIO *bp, const RSA *r,int offset);
236#endif
237
238int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(), int sgckey);
239RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(), int sgckey);
240
241int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)());
242RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)());
243
244/* The following 2 functions sign and verify a X509_SIG ASN1 object
245 * inside PKCS#1 padded RSA encryption */
246int RSA_sign(int type, const unsigned char *m, unsigned int m_length,
247 unsigned char *sigret, unsigned int *siglen, RSA *rsa);
248int RSA_verify(int type, const unsigned char *m, unsigned int m_length,
249 unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
250
251/* The following 2 function sign and verify a ASN1_OCTET_STRING
252 * object inside PKCS#1 padded RSA encryption */
253int RSA_sign_ASN1_OCTET_STRING(int type,
254 const unsigned char *m, unsigned int m_length,
255 unsigned char *sigret, unsigned int *siglen, RSA *rsa);
256int RSA_verify_ASN1_OCTET_STRING(int type,
257 const unsigned char *m, unsigned int m_length,
258 unsigned char *sigbuf, unsigned int siglen, RSA *rsa);
259
260int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
261void RSA_blinding_off(RSA *rsa);
262
263int RSA_padding_add_PKCS1_type_1(unsigned char *to,int tlen,
264 const unsigned char *f,int fl);
265int RSA_padding_check_PKCS1_type_1(unsigned char *to,int tlen,
266 const unsigned char *f,int fl,int rsa_len);
267int RSA_padding_add_PKCS1_type_2(unsigned char *to,int tlen,
268 const unsigned char *f,int fl);
269int RSA_padding_check_PKCS1_type_2(unsigned char *to,int tlen,
270 const unsigned char *f,int fl,int rsa_len);
271int RSA_padding_add_PKCS1_OAEP(unsigned char *to,int tlen,
272 const unsigned char *f,int fl,
273 const unsigned char *p,int pl);
274int RSA_padding_check_PKCS1_OAEP(unsigned char *to,int tlen,
275 const unsigned char *f,int fl,int rsa_len,
276 const unsigned char *p,int pl);
277int RSA_padding_add_SSLv23(unsigned char *to,int tlen,
278 const unsigned char *f,int fl);
279int RSA_padding_check_SSLv23(unsigned char *to,int tlen,
280 const unsigned char *f,int fl,int rsa_len);
281int RSA_padding_add_none(unsigned char *to,int tlen,
282 const unsigned char *f,int fl);
283int RSA_padding_check_none(unsigned char *to,int tlen,
284 const unsigned char *f,int fl,int rsa_len);
285
286int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
287 CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
288int RSA_set_ex_data(RSA *r,int idx,void *arg);
289void *RSA_get_ex_data(const RSA *r, int idx);
290
291RSA *RSAPublicKey_dup(RSA *rsa);
292RSA *RSAPrivateKey_dup(RSA *rsa);
293
294/* BEGIN ERROR CODES */
295/* The following lines are auto generated by the script mkerr.pl. Any changes
296 * made after this point may be overwritten when the script is next run.
297 */
298void ERR_load_RSA_strings(void);
299
300/* Error codes for the RSA functions. */
301
302/* Function codes. */
303#define RSA_F_MEMORY_LOCK 100
304#define RSA_F_RSA_CHECK_KEY 123
305#define RSA_F_RSA_EAY_PRIVATE_DECRYPT 101
306#define RSA_F_RSA_EAY_PRIVATE_ENCRYPT 102
307#define RSA_F_RSA_EAY_PUBLIC_DECRYPT 103
308#define RSA_F_RSA_EAY_PUBLIC_ENCRYPT 104
309#define RSA_F_RSA_GENERATE_KEY 105
310#define RSA_F_RSA_NEW_METHOD 106
311#define RSA_F_RSA_NULL 124
312#define RSA_F_RSA_PADDING_ADD_NONE 107
313#define RSA_F_RSA_PADDING_ADD_PKCS1_OAEP 121
314#define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1 108
315#define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2 109
316#define RSA_F_RSA_PADDING_ADD_SSLV23 110
317#define RSA_F_RSA_PADDING_CHECK_NONE 111
318#define RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP 122
319#define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1 112
320#define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2 113
321#define RSA_F_RSA_PADDING_CHECK_SSLV23 114
322#define RSA_F_RSA_PRINT 115
323#define RSA_F_RSA_PRINT_FP 116
324#define RSA_F_RSA_SIGN 117
325#define RSA_F_RSA_SIGN_ASN1_OCTET_STRING 118
326#define RSA_F_RSA_VERIFY 119
327#define RSA_F_RSA_VERIFY_ASN1_OCTET_STRING 120
328
329/* Reason codes. */
330#define RSA_R_ALGORITHM_MISMATCH 100
331#define RSA_R_BAD_E_VALUE 101
332#define RSA_R_BAD_FIXED_HEADER_DECRYPT 102
333#define RSA_R_BAD_PAD_BYTE_COUNT 103
334#define RSA_R_BAD_SIGNATURE 104
335#define RSA_R_BLOCK_TYPE_IS_NOT_01 106
336#define RSA_R_BLOCK_TYPE_IS_NOT_02 107
337#define RSA_R_DATA_GREATER_THAN_MOD_LEN 108
338#define RSA_R_DATA_TOO_LARGE 109
339#define RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 110
340#define RSA_R_DATA_TOO_LARGE_FOR_MODULUS 132
341#define RSA_R_DATA_TOO_SMALL 111
342#define RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE 122
343#define RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY 112
344#define RSA_R_DMP1_NOT_CONGRUENT_TO_D 124
345#define RSA_R_DMQ1_NOT_CONGRUENT_TO_D 125
346#define RSA_R_D_E_NOT_CONGRUENT_TO_1 123
347#define RSA_R_INVALID_MESSAGE_LENGTH 131
348#define RSA_R_IQMP_NOT_INVERSE_OF_Q 126
349#define RSA_R_KEY_SIZE_TOO_SMALL 120
350#define RSA_R_NULL_BEFORE_BLOCK_MISSING 113
351#define RSA_R_N_DOES_NOT_EQUAL_P_Q 127
352#define RSA_R_OAEP_DECODING_ERROR 121
353#define RSA_R_PADDING_CHECK_FAILED 114
354#define RSA_R_P_NOT_PRIME 128
355#define RSA_R_Q_NOT_PRIME 129
356#define RSA_R_RSA_OPERATIONS_NOT_SUPPORTED 130
357#define RSA_R_SSLV3_ROLLBACK_ATTACK 115
358#define RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD 116
359#define RSA_R_UNKNOWN_ALGORITHM_TYPE 117
360#define RSA_R_UNKNOWN_PADDING_TYPE 118
361#define RSA_R_WRONG_SIGNATURE_LENGTH 119
362
363#ifdef __cplusplus
364}
365#endif
366#endif