1 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/asn1t.h>
61 #include <openssl/x509.h>
62 #include <openssl/rsa.h>
63 #include <openssl/evp.h>
66 extern int int_rsa_verify(int dtype
, const unsigned char *m
, unsigned int m_len
,
67 unsigned char *rm
, unsigned int *prm_len
,
68 const unsigned char *sigbuf
, unsigned int siglen
,
71 /* RSA pkey context structure */
75 /* Key gen parameters */
78 /* Keygen callback info */
80 /* RSA padding mode */
84 /* PSS/OAEP salt length */
90 static int pkey_rsa_init(EVP_PKEY_CTX
*ctx
)
93 rctx
= OPENSSL_malloc(sizeof(RSA_PKEY_CTX
));
98 rctx
->pad_mode
= RSA_PKCS1_PADDING
;
105 ctx
->keygen_info
= rctx
->gentmp
;
106 ctx
->keygen_info_count
= 2;
111 static int setup_tbuf(RSA_PKEY_CTX
*ctx
, EVP_PKEY_CTX
*pk
)
115 ctx
->tbuf
= OPENSSL_malloc(EVP_PKEY_size(pk
->pkey
));
121 static void pkey_rsa_cleanup(EVP_PKEY_CTX
*ctx
)
123 RSA_PKEY_CTX
*rctx
= ctx
->data
;
127 BN_free(rctx
->pub_exp
);
129 OPENSSL_free(rctx
->tbuf
);
134 static int pkey_rsa_sign(EVP_PKEY_CTX
*ctx
, unsigned char *sig
, int *siglen
,
135 const unsigned char *tbs
, int tbslen
)
138 RSA_PKEY_CTX
*rctx
= ctx
->data
;
139 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
143 if (tbslen
!= EVP_MD_size(rctx
->md
))
145 RSAerr(RSA_F_PKEY_RSA_SIGN
,
146 RSA_R_INVALID_DIGEST_LENGTH
);
149 if (rctx
->pad_mode
== RSA_X931_PADDING
)
151 if (!setup_tbuf(rctx
, ctx
))
153 memcpy(rctx
->tbuf
, tbs
, tbslen
);
155 RSA_X931_hash_id(EVP_MD_type(rctx
->md
));
156 ret
= RSA_private_encrypt(tbslen
+ 1, rctx
->tbuf
,
157 sig
, rsa
, RSA_X931_PADDING
);
159 else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
162 ret
= RSA_sign(EVP_MD_type(rctx
->md
),
163 tbs
, tbslen
, sig
, &sltmp
, rsa
);
168 else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
)
170 if (!setup_tbuf(rctx
, ctx
))
172 if (!RSA_padding_add_PKCS1_PSS(rsa
, rctx
->tbuf
, tbs
,
173 rctx
->md
, rctx
->saltlen
))
175 ret
= RSA_private_encrypt(RSA_size(rsa
), rctx
->tbuf
,
176 sig
, rsa
, RSA_NO_PADDING
);
182 ret
= RSA_private_encrypt(tbslen
, tbs
, sig
, ctx
->pkey
->pkey
.rsa
,
191 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX
*ctx
,
192 unsigned char *rout
, int *routlen
,
193 const unsigned char *sig
, int siglen
)
196 RSA_PKEY_CTX
*rctx
= ctx
->data
;
200 if (rctx
->pad_mode
== RSA_X931_PADDING
)
202 if (!setup_tbuf(rctx
, ctx
))
204 ret
= RSA_public_decrypt(siglen
, sig
,
205 rctx
->tbuf
, ctx
->pkey
->pkey
.rsa
,
210 if (rctx
->tbuf
[ret
] !=
211 RSA_X931_hash_id(EVP_MD_type(rctx
->md
)))
213 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
214 RSA_R_ALGORITHM_MISMATCH
);
217 if (ret
!= EVP_MD_size(rctx
->md
))
219 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
220 RSA_R_INVALID_DIGEST_LENGTH
);
224 memcpy(rout
, rctx
->tbuf
, ret
);
226 else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
229 ret
= int_rsa_verify(EVP_MD_type(rctx
->md
),
230 NULL
, 0, rout
, &sltmp
,
231 sig
, siglen
, ctx
->pkey
->pkey
.rsa
);
238 ret
= RSA_public_decrypt(siglen
, sig
, rout
, ctx
->pkey
->pkey
.rsa
,
246 static int pkey_rsa_verify(EVP_PKEY_CTX
*ctx
,
247 const unsigned char *sig
, int siglen
,
248 const unsigned char *tbs
, int tbslen
)
250 RSA_PKEY_CTX
*rctx
= ctx
->data
;
251 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
255 if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
256 return RSA_verify(EVP_MD_type(rctx
->md
), tbs
, tbslen
,
258 if (rctx
->pad_mode
== RSA_X931_PADDING
)
260 if (pkey_rsa_verifyrecover(ctx
, NULL
, &rslen
,
264 else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
)
267 if (!setup_tbuf(rctx
, ctx
))
269 ret
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
270 rsa
, RSA_NO_PADDING
);
273 ret
= RSA_verify_PKCS1_PSS(rsa
, tbs
, rctx
->md
,
274 rctx
->tbuf
, rctx
->saltlen
);
284 if (!setup_tbuf(rctx
, ctx
))
286 rslen
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
287 rsa
, rctx
->pad_mode
);
292 if ((rslen
!= tbslen
) || memcmp(tbs
, rctx
->tbuf
, rslen
))
300 static int pkey_rsa_encrypt(EVP_PKEY_CTX
*ctx
, unsigned char *out
, int *outlen
,
301 const unsigned char *in
, int inlen
)
304 RSA_PKEY_CTX
*rctx
= ctx
->data
;
305 ret
= RSA_public_encrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
313 static int pkey_rsa_decrypt(EVP_PKEY_CTX
*ctx
, unsigned char *out
, int *outlen
,
314 const unsigned char *in
, int inlen
)
317 RSA_PKEY_CTX
*rctx
= ctx
->data
;
318 ret
= RSA_private_decrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
326 static int check_padding_md(const EVP_MD
*md
, int padding
)
331 if (padding
== RSA_NO_PADDING
)
333 RSAerr(RSA_F_CHECK_PADDING_NID
, RSA_R_INVALID_PADDING_MODE
);
337 if (padding
== RSA_X931_PADDING
)
339 if (RSA_X931_hash_id(EVP_MD_type(md
)) == -1)
341 RSAerr(RSA_F_CHECK_PADDING_NID
,
342 RSA_R_INVALID_X931_DIGEST
);
352 static int pkey_rsa_ctrl(EVP_PKEY_CTX
*ctx
, int type
, int p1
, void *p2
)
354 RSA_PKEY_CTX
*rctx
= ctx
->data
;
357 case EVP_PKEY_CTRL_RSA_PADDING
:
358 if ((p1
>= RSA_PKCS1_PADDING
) && (p1
<= RSA_PKCS1_PSS_PADDING
))
360 if (!check_padding_md(rctx
->md
, p1
))
362 if (p1
== RSA_PKCS1_PSS_PADDING
)
364 if (ctx
->operation
== EVP_PKEY_OP_VERIFYRECOVER
)
367 rctx
->md
= EVP_sha1();
369 if (p1
== RSA_PKCS1_OAEP_PADDING
)
371 if (!(ctx
->operation
& EVP_PKEY_OP_TYPE_CRYPT
))
374 rctx
->md
= EVP_sha1();
381 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN
:
384 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
)
389 case EVP_PKEY_CTRL_MD
:
390 if (!check_padding_md(p2
, rctx
->pad_mode
))
401 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX
*ctx
,
402 const char *type
, const char *value
)
404 if (!strcmp(type
, "rsa_padding_mode"))
409 if (!strcmp(value
, "pkcs1"))
410 pm
= RSA_PKCS1_PADDING
;
411 else if (!strcmp(value
, "sslv23"))
412 pm
= RSA_SSLV23_PADDING
;
413 else if (!strcmp(value
, "none"))
415 else if (!strcmp(value
, "oeap"))
416 pm
= RSA_PKCS1_OAEP_PADDING
;
417 else if (!strcmp(value
, "x931"))
418 pm
= RSA_X931_PADDING
;
419 else if (!strcmp(value
, "pss"))
420 pm
= RSA_PKCS1_PSS_PADDING
;
423 return EVP_PKEY_CTX_set_rsa_padding(ctx
, pm
);
425 if (!strcmp(type
, "rsa_pss_saltlen"))
428 saltlen
= atoi(value
);
429 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx
, saltlen
);
434 static int pkey_rsa_keygen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
437 RSA_PKEY_CTX
*rctx
= ctx
->data
;
442 rctx
->pub_exp
= BN_new();
443 if (!rctx
->pub_exp
|| !BN_set_word(rctx
->pub_exp
, RSA_F4
))
452 evp_pkey_set_cb_translate(pcb
, ctx
);
456 ret
= RSA_generate_key_ex(rsa
, rctx
->nbits
, rctx
->pub_exp
, pcb
);
458 EVP_PKEY_assign_RSA(pkey
, rsa
);
464 const EVP_PKEY_METHOD rsa_pkey_meth
=
483 pkey_rsa_verifyrecover
,