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/* $OpenBSD: rsa_ameth.c,v 1.15 2015/12/03 23:03:10 beck Exp $ */ |
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
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* project 2006. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2006 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include <openssl/opensslconf.h> |
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#include <openssl/asn1t.h> |
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#include <openssl/bn.h> |
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#include <openssl/err.h> |
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#include <openssl/rsa.h> |
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#include <openssl/x509.h> |
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#ifndef OPENSSL_NO_CMS |
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#include <openssl/cms.h> |
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#endif |
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#include "asn1_locl.h" |
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static int |
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rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey) |
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{ |
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unsigned char *penc = NULL; |
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int penclen; |
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|
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penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc); |
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if (penclen <= 0) |
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return 0; |
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if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA), |
85 |
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V_ASN1_NULL, NULL, penc, penclen)) |
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return 1; |
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|
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free(penc); |
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return 0; |
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} |
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static int |
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rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey) |
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6 |
{ |
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const unsigned char *p; |
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int pklen; |
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RSA *rsa = NULL; |
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✗✓ |
6 |
if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey)) |
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return 0; |
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✗✓ |
6 |
if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) { |
102 |
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RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB); |
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return 0; |
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} |
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6 |
EVP_PKEY_assign_RSA (pkey, rsa); |
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6 |
return 1; |
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} |
108 |
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109 |
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static int |
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rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
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3 |
{ |
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✓✗✗✓
|
3 |
if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0 || |
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BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0) |
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return 0; |
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3 |
return 1; |
116 |
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} |
117 |
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118 |
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static int |
119 |
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old_rsa_priv_decode(EVP_PKEY *pkey, const unsigned char **pder, int derlen) |
120 |
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1 |
{ |
121 |
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RSA *rsa; |
122 |
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123 |
✗✓ |
1 |
if (!(rsa = d2i_RSAPrivateKey (NULL, pder, derlen))) { |
124 |
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RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB); |
125 |
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return 0; |
126 |
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} |
127 |
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1 |
EVP_PKEY_assign_RSA(pkey, rsa); |
128 |
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1 |
return 1; |
129 |
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} |
130 |
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131 |
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static int |
132 |
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old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder) |
133 |
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{ |
134 |
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return i2d_RSAPrivateKey(pkey->pkey.rsa, pder); |
135 |
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} |
136 |
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137 |
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static int |
138 |
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rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey) |
139 |
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{ |
140 |
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unsigned char *rk = NULL; |
141 |
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int rklen; |
142 |
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143 |
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rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk); |
144 |
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145 |
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if (rklen <= 0) { |
146 |
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RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
147 |
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return 0; |
148 |
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} |
149 |
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|
150 |
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if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0, |
151 |
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V_ASN1_NULL, NULL, rk, rklen)) { |
152 |
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RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE); |
153 |
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return 0; |
154 |
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} |
155 |
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156 |
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return 1; |
157 |
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} |
158 |
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159 |
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static int |
160 |
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rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8) |
161 |
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{ |
162 |
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const unsigned char *p; |
163 |
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int pklen; |
164 |
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165 |
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if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8)) |
166 |
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return 0; |
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return old_rsa_priv_decode(pkey, &p, pklen); |
168 |
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} |
169 |
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170 |
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static int |
171 |
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int_rsa_size(const EVP_PKEY *pkey) |
172 |
|
10 |
{ |
173 |
|
10 |
return RSA_size(pkey->pkey.rsa); |
174 |
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} |
175 |
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176 |
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static int |
177 |
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rsa_bits(const EVP_PKEY *pkey) |
178 |
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{ |
179 |
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return BN_num_bits(pkey->pkey.rsa->n); |
180 |
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} |
181 |
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182 |
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static void |
183 |
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int_rsa_free(EVP_PKEY *pkey) |
184 |
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{ |
185 |
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RSA_free(pkey->pkey.rsa); |
186 |
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} |
187 |
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188 |
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static void |
189 |
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update_buflen(const BIGNUM *b, size_t *pbuflen) |
190 |
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{ |
191 |
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size_t i; |
192 |
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193 |
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if (!b) |
194 |
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return; |
195 |
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if (*pbuflen < (i = (size_t)BN_num_bytes(b))) |
196 |
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*pbuflen = i; |
197 |
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} |
198 |
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199 |
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static int |
200 |
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do_rsa_print(BIO *bp, const RSA *x, int off, int priv) |
201 |
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{ |
202 |
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char *str; |
203 |
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const char *s; |
204 |
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unsigned char *m = NULL; |
205 |
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int ret = 0, mod_len = 0; |
206 |
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size_t buf_len = 0; |
207 |
|
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|
208 |
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update_buflen(x->n, &buf_len); |
209 |
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update_buflen(x->e, &buf_len); |
210 |
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|
211 |
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if (priv) { |
212 |
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update_buflen(x->d, &buf_len); |
213 |
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update_buflen(x->p, &buf_len); |
214 |
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update_buflen(x->q, &buf_len); |
215 |
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update_buflen(x->dmp1, &buf_len); |
216 |
|
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update_buflen(x->dmq1, &buf_len); |
217 |
|
|
update_buflen(x->iqmp, &buf_len); |
218 |
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|
} |
219 |
|
|
|
220 |
|
|
m = malloc(buf_len + 10); |
221 |
|
|
if (m == NULL) { |
222 |
|
|
RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE); |
223 |
|
|
goto err; |
224 |
|
|
} |
225 |
|
|
|
226 |
|
|
if (x->n != NULL) |
227 |
|
|
mod_len = BN_num_bits(x->n); |
228 |
|
|
|
229 |
|
|
if (!BIO_indent(bp, off, 128)) |
230 |
|
|
goto err; |
231 |
|
|
|
232 |
|
|
if (priv && x->d) { |
233 |
|
|
if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0) |
234 |
|
|
goto err; |
235 |
|
|
str = "modulus:"; |
236 |
|
|
s = "publicExponent:"; |
237 |
|
|
} else { |
238 |
|
|
if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0) |
239 |
|
|
goto err; |
240 |
|
|
str = "Modulus:"; |
241 |
|
|
s= "Exponent:"; |
242 |
|
|
} |
243 |
|
|
if (!ASN1_bn_print(bp, str, x->n, m, off)) |
244 |
|
|
goto err; |
245 |
|
|
if (!ASN1_bn_print(bp, s, x->e, m, off)) |
246 |
|
|
goto err; |
247 |
|
|
if (priv) { |
248 |
|
|
if (!ASN1_bn_print(bp, "privateExponent:", x->d,m, off)) |
249 |
|
|
goto err; |
250 |
|
|
if (!ASN1_bn_print(bp, "prime1:", x->p, m, off)) |
251 |
|
|
goto err; |
252 |
|
|
if (!ASN1_bn_print(bp, "prime2:", x->q, m, off)) |
253 |
|
|
goto err; |
254 |
|
|
if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off)) |
255 |
|
|
goto err; |
256 |
|
|
if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off)) |
257 |
|
|
goto err; |
258 |
|
|
if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off)) |
259 |
|
|
goto err; |
260 |
|
|
} |
261 |
|
|
ret = 1; |
262 |
|
|
err: |
263 |
|
|
free(m); |
264 |
|
|
return (ret); |
265 |
|
|
} |
266 |
|
|
|
267 |
|
|
static int |
268 |
|
|
rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx) |
269 |
|
|
{ |
270 |
|
|
return do_rsa_print(bp, pkey->pkey.rsa, indent, 0); |
271 |
|
|
} |
272 |
|
|
|
273 |
|
|
static int |
274 |
|
|
rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent, ASN1_PCTX *ctx) |
275 |
|
|
{ |
276 |
|
|
return do_rsa_print(bp, pkey->pkey.rsa, indent, 1); |
277 |
|
|
} |
278 |
|
|
|
279 |
|
|
static RSA_PSS_PARAMS * |
280 |
|
|
rsa_pss_decode(const X509_ALGOR *alg, X509_ALGOR **pmaskHash) |
281 |
|
|
{ |
282 |
|
|
const unsigned char *p; |
283 |
|
|
int plen; |
284 |
|
|
RSA_PSS_PARAMS *pss; |
285 |
|
|
|
286 |
|
|
*pmaskHash = NULL; |
287 |
|
|
|
288 |
|
|
if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE) |
289 |
|
|
return NULL; |
290 |
|
|
|
291 |
|
|
p = alg->parameter->value.sequence->data; |
292 |
|
|
plen = alg->parameter->value.sequence->length; |
293 |
|
|
pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen); |
294 |
|
|
|
295 |
|
|
if (!pss) |
296 |
|
|
return NULL; |
297 |
|
|
|
298 |
|
|
if (pss->maskGenAlgorithm) { |
299 |
|
|
ASN1_TYPE *param = pss->maskGenAlgorithm->parameter; |
300 |
|
|
if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1 && |
301 |
|
|
param && param->type == V_ASN1_SEQUENCE) { |
302 |
|
|
p = param->value.sequence->data; |
303 |
|
|
plen = param->value.sequence->length; |
304 |
|
|
*pmaskHash = d2i_X509_ALGOR(NULL, &p, plen); |
305 |
|
|
} |
306 |
|
|
} |
307 |
|
|
|
308 |
|
|
return pss; |
309 |
|
|
} |
310 |
|
|
|
311 |
|
|
static int |
312 |
|
|
rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss, X509_ALGOR *maskHash, |
313 |
|
|
int indent) |
314 |
|
|
{ |
315 |
|
|
int rv = 0; |
316 |
|
|
|
317 |
|
|
if (!pss) { |
318 |
|
|
if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0) |
319 |
|
|
return 0; |
320 |
|
|
return 1; |
321 |
|
|
} |
322 |
|
|
if (BIO_puts(bp, "\n") <= 0) |
323 |
|
|
goto err; |
324 |
|
|
if (!BIO_indent(bp, indent, 128)) |
325 |
|
|
goto err; |
326 |
|
|
if (BIO_puts(bp, "Hash Algorithm: ") <= 0) |
327 |
|
|
goto err; |
328 |
|
|
|
329 |
|
|
if (pss->hashAlgorithm) { |
330 |
|
|
if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0) |
331 |
|
|
goto err; |
332 |
|
|
} else if (BIO_puts(bp, "sha1 (default)") <= 0) |
333 |
|
|
goto err; |
334 |
|
|
|
335 |
|
|
if (BIO_puts(bp, "\n") <= 0) |
336 |
|
|
goto err; |
337 |
|
|
|
338 |
|
|
if (!BIO_indent(bp, indent, 128)) |
339 |
|
|
goto err; |
340 |
|
|
|
341 |
|
|
if (BIO_puts(bp, "Mask Algorithm: ") <= 0) |
342 |
|
|
goto err; |
343 |
|
|
if (pss->maskGenAlgorithm) { |
344 |
|
|
if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0) |
345 |
|
|
goto err; |
346 |
|
|
if (BIO_puts(bp, " with ") <= 0) |
347 |
|
|
goto err; |
348 |
|
|
if (maskHash) { |
349 |
|
|
if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0) |
350 |
|
|
goto err; |
351 |
|
|
} else if (BIO_puts(bp, "INVALID") <= 0) |
352 |
|
|
goto err; |
353 |
|
|
} else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) |
354 |
|
|
goto err; |
355 |
|
|
BIO_puts(bp, "\n"); |
356 |
|
|
|
357 |
|
|
if (!BIO_indent(bp, indent, 128)) |
358 |
|
|
goto err; |
359 |
|
|
if (BIO_puts(bp, "Salt Length: 0x") <= 0) |
360 |
|
|
goto err; |
361 |
|
|
if (pss->saltLength) { |
362 |
|
|
if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0) |
363 |
|
|
goto err; |
364 |
|
|
} else if (BIO_puts(bp, "14 (default)") <= 0) |
365 |
|
|
goto err; |
366 |
|
|
BIO_puts(bp, "\n"); |
367 |
|
|
|
368 |
|
|
if (!BIO_indent(bp, indent, 128)) |
369 |
|
|
goto err; |
370 |
|
|
if (BIO_puts(bp, "Trailer Field: 0x") <= 0) |
371 |
|
|
goto err; |
372 |
|
|
if (pss->trailerField) { |
373 |
|
|
if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0) |
374 |
|
|
goto err; |
375 |
|
|
} else if (BIO_puts(bp, "BC (default)") <= 0) |
376 |
|
|
goto err; |
377 |
|
|
BIO_puts(bp, "\n"); |
378 |
|
|
|
379 |
|
|
rv = 1; |
380 |
|
|
|
381 |
|
|
err: |
382 |
|
|
return rv; |
383 |
|
|
} |
384 |
|
|
|
385 |
|
|
static int |
386 |
|
|
rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg, const ASN1_STRING *sig, |
387 |
|
|
int indent, ASN1_PCTX *pctx) |
388 |
|
|
{ |
389 |
|
|
if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) { |
390 |
|
|
int rv; |
391 |
|
|
RSA_PSS_PARAMS *pss; |
392 |
|
|
X509_ALGOR *maskHash; |
393 |
|
|
pss = rsa_pss_decode(sigalg, &maskHash); |
394 |
|
|
rv = rsa_pss_param_print(bp, pss, maskHash, indent); |
395 |
|
|
if (pss) |
396 |
|
|
RSA_PSS_PARAMS_free(pss); |
397 |
|
|
if (maskHash) |
398 |
|
|
X509_ALGOR_free(maskHash); |
399 |
|
|
if (!rv) |
400 |
|
|
return 0; |
401 |
|
|
} else if (!sig && BIO_puts(bp, "\n") <= 0) |
402 |
|
|
return 0; |
403 |
|
|
if (sig) |
404 |
|
|
return X509_signature_dump(bp, sig, indent); |
405 |
|
|
return 1; |
406 |
|
|
} |
407 |
|
|
|
408 |
|
|
static int |
409 |
|
|
rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
410 |
|
5 |
{ |
411 |
|
5 |
X509_ALGOR *alg = NULL; |
412 |
|
|
|
413 |
✓✓✓✗
|
5 |
switch (op) { |
414 |
|
|
case ASN1_PKEY_CTRL_PKCS7_SIGN: |
415 |
✓✗ |
2 |
if (arg1 == 0) |
416 |
|
2 |
PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg); |
417 |
|
|
break; |
418 |
|
|
|
419 |
|
|
case ASN1_PKEY_CTRL_PKCS7_ENCRYPT: |
420 |
✓✗ |
1 |
if (arg1 == 0) |
421 |
|
1 |
PKCS7_RECIP_INFO_get0_alg(arg2, &alg); |
422 |
|
|
break; |
423 |
|
|
#ifndef OPENSSL_NO_CMS |
424 |
|
|
case ASN1_PKEY_CTRL_CMS_SIGN: |
425 |
|
|
if (arg1 == 0) |
426 |
|
|
CMS_SignerInfo_get0_algs(arg2, NULL, NULL, NULL, &alg); |
427 |
|
|
break; |
428 |
|
|
|
429 |
|
|
case ASN1_PKEY_CTRL_CMS_ENVELOPE: |
430 |
|
|
if (arg1 == 0) |
431 |
|
|
CMS_RecipientInfo_ktri_get0_algs(arg2, NULL, NULL, &alg); |
432 |
|
|
break; |
433 |
|
|
#endif |
434 |
|
|
|
435 |
|
|
case ASN1_PKEY_CTRL_DEFAULT_MD_NID: |
436 |
|
2 |
*(int *)arg2 = NID_sha1; |
437 |
|
2 |
return 1; |
438 |
|
|
|
439 |
|
|
default: |
440 |
|
|
return -2; |
441 |
|
|
} |
442 |
|
|
|
443 |
✓✗ |
3 |
if (alg) |
444 |
|
3 |
X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), |
445 |
|
|
V_ASN1_NULL, 0); |
446 |
|
|
|
447 |
|
3 |
return 1; |
448 |
|
|
} |
449 |
|
|
|
450 |
|
|
/* Customised RSA item verification routine. This is called |
451 |
|
|
* when a signature is encountered requiring special handling. We |
452 |
|
|
* currently only handle PSS. |
453 |
|
|
*/ |
454 |
|
|
static int |
455 |
|
|
rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, |
456 |
|
|
X509_ALGOR *sigalg, ASN1_BIT_STRING *sig, EVP_PKEY *pkey) |
457 |
|
|
{ |
458 |
|
|
int rv = -1; |
459 |
|
|
int saltlen; |
460 |
|
|
const EVP_MD *mgf1md = NULL, *md = NULL; |
461 |
|
|
RSA_PSS_PARAMS *pss; |
462 |
|
|
X509_ALGOR *maskHash; |
463 |
|
|
EVP_PKEY_CTX *pkctx; |
464 |
|
|
|
465 |
|
|
/* Sanity check: make sure it is PSS */ |
466 |
|
|
if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) { |
467 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE); |
468 |
|
|
return -1; |
469 |
|
|
} |
470 |
|
|
|
471 |
|
|
/* Decode PSS parameters */ |
472 |
|
|
pss = rsa_pss_decode(sigalg, &maskHash); |
473 |
|
|
|
474 |
|
|
if (pss == NULL) { |
475 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_PSS_PARAMETERS); |
476 |
|
|
goto err; |
477 |
|
|
} |
478 |
|
|
/* Check mask and lookup mask hash algorithm */ |
479 |
|
|
if (pss->maskGenAlgorithm) { |
480 |
|
|
if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) != NID_mgf1) { |
481 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, |
482 |
|
|
RSA_R_UNSUPPORTED_MASK_ALGORITHM); |
483 |
|
|
goto err; |
484 |
|
|
} |
485 |
|
|
if (!maskHash) { |
486 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, |
487 |
|
|
RSA_R_UNSUPPORTED_MASK_PARAMETER); |
488 |
|
|
goto err; |
489 |
|
|
} |
490 |
|
|
mgf1md = EVP_get_digestbyobj(maskHash->algorithm); |
491 |
|
|
if (mgf1md == NULL) { |
492 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, |
493 |
|
|
RSA_R_UNKNOWN_MASK_DIGEST); |
494 |
|
|
goto err; |
495 |
|
|
} |
496 |
|
|
} else |
497 |
|
|
mgf1md = EVP_sha1(); |
498 |
|
|
|
499 |
|
|
if (pss->hashAlgorithm) { |
500 |
|
|
md = EVP_get_digestbyobj(pss->hashAlgorithm->algorithm); |
501 |
|
|
if (md == NULL) { |
502 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNKNOWN_PSS_DIGEST); |
503 |
|
|
goto err; |
504 |
|
|
} |
505 |
|
|
} else |
506 |
|
|
md = EVP_sha1(); |
507 |
|
|
|
508 |
|
|
if (pss->saltLength) { |
509 |
|
|
saltlen = ASN1_INTEGER_get(pss->saltLength); |
510 |
|
|
|
511 |
|
|
/* Could perform more salt length sanity checks but the main |
512 |
|
|
* RSA routines will trap other invalid values anyway. |
513 |
|
|
*/ |
514 |
|
|
if (saltlen < 0) { |
515 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, |
516 |
|
|
RSA_R_INVALID_SALT_LENGTH); |
517 |
|
|
goto err; |
518 |
|
|
} |
519 |
|
|
} else |
520 |
|
|
saltlen = 20; |
521 |
|
|
|
522 |
|
|
/* low-level routines support only trailer field 0xbc (value 1) |
523 |
|
|
* and PKCS#1 says we should reject any other value anyway. |
524 |
|
|
*/ |
525 |
|
|
if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) { |
526 |
|
|
RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_INVALID_TRAILER); |
527 |
|
|
goto err; |
528 |
|
|
} |
529 |
|
|
|
530 |
|
|
/* We have all parameters now set up context */ |
531 |
|
|
|
532 |
|
|
if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey)) |
533 |
|
|
goto err; |
534 |
|
|
|
535 |
|
|
if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0) |
536 |
|
|
goto err; |
537 |
|
|
|
538 |
|
|
if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0) |
539 |
|
|
goto err; |
540 |
|
|
|
541 |
|
|
if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0) |
542 |
|
|
goto err; |
543 |
|
|
/* Carry on */ |
544 |
|
|
rv = 2; |
545 |
|
|
|
546 |
|
|
err: |
547 |
|
|
RSA_PSS_PARAMS_free(pss); |
548 |
|
|
if (maskHash) |
549 |
|
|
X509_ALGOR_free(maskHash); |
550 |
|
|
return rv; |
551 |
|
|
} |
552 |
|
|
|
553 |
|
|
static int |
554 |
|
|
rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn, |
555 |
|
|
X509_ALGOR *alg1, X509_ALGOR *alg2, ASN1_BIT_STRING *sig) |
556 |
|
|
{ |
557 |
|
|
int pad_mode; |
558 |
|
|
EVP_PKEY_CTX *pkctx = ctx->pctx; |
559 |
|
|
|
560 |
|
|
if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0) |
561 |
|
|
return 0; |
562 |
|
|
if (pad_mode == RSA_PKCS1_PADDING) |
563 |
|
|
return 2; |
564 |
|
|
if (pad_mode == RSA_PKCS1_PSS_PADDING) { |
565 |
|
|
const EVP_MD *sigmd, *mgf1md; |
566 |
|
|
RSA_PSS_PARAMS *pss = NULL; |
567 |
|
|
X509_ALGOR *mgf1alg = NULL; |
568 |
|
|
ASN1_STRING *os1 = NULL, *os2 = NULL; |
569 |
|
|
EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx); |
570 |
|
|
int saltlen, rv = 0; |
571 |
|
|
|
572 |
|
|
sigmd = EVP_MD_CTX_md(ctx); |
573 |
|
|
if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0) |
574 |
|
|
goto err; |
575 |
|
|
if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen)) |
576 |
|
|
goto err; |
577 |
|
|
if (saltlen == -1) |
578 |
|
|
saltlen = EVP_MD_size(sigmd); |
579 |
|
|
else if (saltlen == -2) { |
580 |
|
|
saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2; |
581 |
|
|
if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0) |
582 |
|
|
saltlen--; |
583 |
|
|
} |
584 |
|
|
pss = RSA_PSS_PARAMS_new(); |
585 |
|
|
if (!pss) |
586 |
|
|
goto err; |
587 |
|
|
if (saltlen != 20) { |
588 |
|
|
pss->saltLength = ASN1_INTEGER_new(); |
589 |
|
|
if (!pss->saltLength) |
590 |
|
|
goto err; |
591 |
|
|
if (!ASN1_INTEGER_set(pss->saltLength, saltlen)) |
592 |
|
|
goto err; |
593 |
|
|
} |
594 |
|
|
if (EVP_MD_type(sigmd) != NID_sha1) { |
595 |
|
|
pss->hashAlgorithm = X509_ALGOR_new(); |
596 |
|
|
if (!pss->hashAlgorithm) |
597 |
|
|
goto err; |
598 |
|
|
X509_ALGOR_set_md(pss->hashAlgorithm, sigmd); |
599 |
|
|
} |
600 |
|
|
if (EVP_MD_type(mgf1md) != NID_sha1) { |
601 |
|
|
ASN1_STRING *stmp = NULL; |
602 |
|
|
/* need to embed algorithm ID inside another */ |
603 |
|
|
mgf1alg = X509_ALGOR_new(); |
604 |
|
|
X509_ALGOR_set_md(mgf1alg, mgf1md); |
605 |
|
|
if (!ASN1_item_pack(mgf1alg, ASN1_ITEM_rptr(X509_ALGOR), |
606 |
|
|
&stmp)) |
607 |
|
|
goto err; |
608 |
|
|
pss->maskGenAlgorithm = X509_ALGOR_new(); |
609 |
|
|
if (!pss->maskGenAlgorithm) |
610 |
|
|
goto err; |
611 |
|
|
X509_ALGOR_set0(pss->maskGenAlgorithm, |
612 |
|
|
OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp); |
613 |
|
|
} |
614 |
|
|
/* Finally create string with pss parameter encoding. */ |
615 |
|
|
if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os1)) |
616 |
|
|
goto err; |
617 |
|
|
if (alg2) { |
618 |
|
|
os2 = ASN1_STRING_dup(os1); |
619 |
|
|
if (!os2) |
620 |
|
|
goto err; |
621 |
|
|
X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss), |
622 |
|
|
V_ASN1_SEQUENCE, os2); |
623 |
|
|
} |
624 |
|
|
X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss), |
625 |
|
|
V_ASN1_SEQUENCE, os1); |
626 |
|
|
os1 = os2 = NULL; |
627 |
|
|
rv = 3; |
628 |
|
|
err: |
629 |
|
|
if (mgf1alg) |
630 |
|
|
X509_ALGOR_free(mgf1alg); |
631 |
|
|
if (pss) |
632 |
|
|
RSA_PSS_PARAMS_free(pss); |
633 |
|
|
ASN1_STRING_free(os1); |
634 |
|
|
return rv; |
635 |
|
|
} |
636 |
|
|
return 2; |
637 |
|
|
} |
638 |
|
|
|
639 |
|
|
const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = { |
640 |
|
|
{ |
641 |
|
|
.pkey_id = EVP_PKEY_RSA, |
642 |
|
|
.pkey_base_id = EVP_PKEY_RSA, |
643 |
|
|
.pkey_flags = ASN1_PKEY_SIGPARAM_NULL, |
644 |
|
|
|
645 |
|
|
.pem_str = "RSA", |
646 |
|
|
.info = "OpenSSL RSA method", |
647 |
|
|
|
648 |
|
|
.pub_decode = rsa_pub_decode, |
649 |
|
|
.pub_encode = rsa_pub_encode, |
650 |
|
|
.pub_cmp = rsa_pub_cmp, |
651 |
|
|
.pub_print = rsa_pub_print, |
652 |
|
|
|
653 |
|
|
.priv_decode = rsa_priv_decode, |
654 |
|
|
.priv_encode = rsa_priv_encode, |
655 |
|
|
.priv_print = rsa_priv_print, |
656 |
|
|
|
657 |
|
|
.pkey_size = int_rsa_size, |
658 |
|
|
.pkey_bits = rsa_bits, |
659 |
|
|
|
660 |
|
|
.sig_print = rsa_sig_print, |
661 |
|
|
|
662 |
|
|
.pkey_free = int_rsa_free, |
663 |
|
|
.pkey_ctrl = rsa_pkey_ctrl, |
664 |
|
|
.old_priv_decode = old_rsa_priv_decode, |
665 |
|
|
.old_priv_encode = old_rsa_priv_encode, |
666 |
|
|
.item_verify = rsa_item_verify, |
667 |
|
|
.item_sign = rsa_item_sign |
668 |
|
|
}, |
669 |
|
|
|
670 |
|
|
{ |
671 |
|
|
.pkey_id = EVP_PKEY_RSA2, |
672 |
|
|
.pkey_base_id = EVP_PKEY_RSA, |
673 |
|
|
.pkey_flags = ASN1_PKEY_ALIAS |
674 |
|
|
} |
675 |
|
|
}; |