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