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 /* RSA padding mode */
86 static int pkey_rsa_init(EVP_PKEY_CTX *ctx)
89 rctx = OPENSSL_malloc(sizeof(RSA_PKEY_CTX));
94 rctx->pad_mode = RSA_PKCS1_PADDING;
103 static int setup_tbuf(RSA_PKEY_CTX *ctx, EVP_PKEY_CTX *pk)
107 ctx->tbuf = OPENSSL_malloc(EVP_PKEY_size(pk->pkey));
113 static void pkey_rsa_cleanup(EVP_PKEY_CTX *ctx)
115 RSA_PKEY_CTX *rctx = ctx->data;
119 BN_free(rctx->pub_exp);
121 OPENSSL_free(rctx->tbuf);
126 static int pkey_rsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, int *siglen,
127 const unsigned char *tbs, int tbslen)
130 RSA_PKEY_CTX *rctx = ctx->data;
134 if (tbslen != EVP_MD_size(rctx->md))
136 RSAerr(RSA_F_PKEY_RSA_SIGN,
137 RSA_R_INVALID_DIGEST_LENGTH);
140 if (rctx->pad_mode == RSA_X931_PADDING)
142 if (!setup_tbuf(rctx, ctx))
144 memcpy(rctx->tbuf, tbs, tbslen);
146 RSA_X931_hash_id(EVP_MD_type(rctx->md));
147 ret = RSA_private_encrypt(tbslen + 1, rctx->tbuf,
148 sig, ctx->pkey->pkey.rsa,
151 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
154 ret = RSA_sign(EVP_MD_type(rctx->md),
155 tbs, tbslen, sig, &sltmp,
156 ctx->pkey->pkey.rsa);
165 ret = RSA_private_encrypt(tbslen, tbs, sig, ctx->pkey->pkey.rsa,
174 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX *ctx,
175 unsigned char *rout, int *routlen,
176 const unsigned char *sig, int siglen)
179 RSA_PKEY_CTX *rctx = ctx->data;
183 if (rctx->pad_mode == RSA_X931_PADDING)
185 if (!setup_tbuf(rctx, ctx))
187 ret = RSA_public_decrypt(siglen, sig,
188 rctx->tbuf, ctx->pkey->pkey.rsa,
193 if (rctx->tbuf[ret] !=
194 RSA_X931_hash_id(EVP_MD_type(rctx->md)))
196 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
197 RSA_R_ALGORITHM_MISMATCH);
200 if (ret != EVP_MD_size(rctx->md))
202 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER,
203 RSA_R_INVALID_DIGEST_LENGTH);
207 memcpy(rout, rctx->tbuf, ret);
209 else if (rctx->pad_mode == RSA_PKCS1_PADDING)
212 ret = int_rsa_verify(EVP_MD_type(rctx->md),
213 NULL, 0, rout, &sltmp,
214 sig, siglen, ctx->pkey->pkey.rsa);
220 ret = RSA_public_decrypt(siglen, sig, rout, ctx->pkey->pkey.rsa,
228 static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
229 const unsigned char *sig, int siglen,
230 const unsigned char *tbs, int tbslen)
232 RSA_PKEY_CTX *rctx = ctx->data;
236 if (rctx->pad_mode == RSA_PKCS1_PADDING)
237 return RSA_verify(EVP_MD_type(rctx->md), tbs, tbslen,
238 sig, siglen, ctx->pkey->pkey.rsa);
239 if (rctx->pad_mode == RSA_X931_PADDING)
241 if (pkey_rsa_verifyrecover(ctx, NULL, &rslen,
250 if (!setup_tbuf(rctx, ctx))
252 rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
253 ctx->pkey->pkey.rsa, rctx->pad_mode);
258 if ((rslen != tbslen) || memcmp(tbs, rctx->tbuf, rslen))
266 static int pkey_rsa_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
267 const unsigned char *in, int inlen)
270 RSA_PKEY_CTX *rctx = ctx->data;
271 ret = RSA_public_encrypt(inlen, in, out, ctx->pkey->pkey.rsa,
279 static int pkey_rsa_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, int *outlen,
280 const unsigned char *in, int inlen)
283 RSA_PKEY_CTX *rctx = ctx->data;
284 ret = RSA_private_decrypt(inlen, in, out, ctx->pkey->pkey.rsa,
292 static int check_padding_md(const EVP_MD *md, int padding)
296 if (padding == RSA_NO_PADDING)
298 RSAerr(RSA_F_CHECK_PADDING_NID, RSA_R_INVALID_PADDING_MODE);
302 if (padding == RSA_X931_PADDING)
304 if (RSA_X931_hash_id(EVP_MD_type(md)) == -1)
306 RSAerr(RSA_F_CHECK_PADDING_NID,
307 RSA_R_INVALID_X931_DIGEST);
317 static int pkey_rsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
319 RSA_PKEY_CTX *rctx = ctx->data;
322 case EVP_PKEY_CTRL_RSA_PADDING:
323 /* TODO: add PSS support */
324 if ((p1 >= RSA_PKCS1_PADDING) && (p1 <= RSA_X931_PADDING))
326 if (ctx->operation == EVP_PKEY_OP_KEYGEN)
328 if (!check_padding_md(rctx->md, p1))
335 case EVP_PKEY_CTRL_MD:
336 if (!check_padding_md(p2, rctx->pad_mode))
347 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX *ctx,
348 const char *type, const char *value)
350 if (!strcmp(type, "rsa_padding_mode"))
355 if (!strcmp(value, "pkcs1"))
356 pm = RSA_PKCS1_PADDING;
357 else if (!strcmp(value, "sslv23"))
358 pm = RSA_SSLV23_PADDING;
359 else if (!strcmp(value, "none"))
361 else if (!strcmp(value, "oeap"))
362 pm = RSA_PKCS1_OAEP_PADDING;
363 else if (!strcmp(value, "x931"))
364 pm = RSA_X931_PADDING;
367 return EVP_PKEY_CTX_set_rsa_padding(ctx, pm);
372 const EVP_PKEY_METHOD rsa_pkey_meth =
390 pkey_rsa_verifyrecover,