1 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 2 * project 2006. 3 */ 4 /* ==================================================================== 5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 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 17 * distribution. 18 * 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/)" 23 * 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 (at) OpenSSL.org. 28 * 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. 32 * 33 * 6. Redistributions of any form whatsoever must retain the following 34 * acknowledgment: 35 * "This product includes software developed by the OpenSSL Project 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 37 * 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 * ==================================================================== 51 * 52 * This product includes cryptographic software written by Eric Young 53 * (eay (at) cryptsoft.com). This product includes software written by Tim 54 * Hudson (tjh (at) cryptsoft.com). */ 55 56 #include <openssl/evp.h> 57 58 #include <openssl/bn.h> 59 #include <openssl/bytestring.h> 60 #include <openssl/digest.h> 61 #include <openssl/err.h> 62 #include <openssl/mem.h> 63 #include <openssl/rsa.h> 64 65 #include "../fipsmodule/rsa/internal.h" 66 #include "../internal.h" 67 #include "internal.h" 68 69 70 static struct CRYPTO_STATIC_MUTEX g_buggy_lock = CRYPTO_STATIC_MUTEX_INIT; 71 static int g_buggy = 1; 72 73 void EVP_set_buggy_rsa_parser(int buggy) { 74 CRYPTO_STATIC_MUTEX_lock_write(&g_buggy_lock); 75 g_buggy = buggy; 76 CRYPTO_STATIC_MUTEX_unlock_write(&g_buggy_lock); 77 } 78 79 static int rsa_pub_encode(CBB *out, const EVP_PKEY *key) { 80 /* See RFC 3279, section 2.3.1. */ 81 CBB spki, algorithm, oid, null, key_bitstring; 82 if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) || 83 !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) || 84 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) || 85 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) || 86 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) || 87 !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) || 88 !CBB_add_u8(&key_bitstring, 0 /* padding */) || 89 !RSA_marshal_public_key(&key_bitstring, key->pkey.rsa) || 90 !CBB_flush(out)) { 91 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR); 92 return 0; 93 } 94 95 return 1; 96 } 97 98 static int rsa_pub_decode(EVP_PKEY *out, CBS *params, CBS *key) { 99 int buggy; 100 CRYPTO_STATIC_MUTEX_lock_read(&g_buggy_lock); 101 buggy = g_buggy; 102 CRYPTO_STATIC_MUTEX_unlock_read(&g_buggy_lock); 103 104 /* See RFC 3279, section 2.3.1. */ 105 106 /* The parameters must be NULL. */ 107 CBS null; 108 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) || 109 CBS_len(&null) != 0 || 110 CBS_len(params) != 0) { 111 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 112 return 0; 113 } 114 115 /* Estonian IDs issued between September 2014 to September 2015 are 116 * broken. See https://crbug.com/532048 and https://crbug.com/534766. 117 * 118 * TODO(davidben): Switch this to the strict version in March 2016 or when 119 * Chromium can force client certificates down a different codepath, whichever 120 * comes first. */ 121 RSA *rsa = buggy ? RSA_parse_public_key_buggy(key) : RSA_parse_public_key(key); 122 if (rsa == NULL || CBS_len(key) != 0) { 123 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 124 RSA_free(rsa); 125 return 0; 126 } 127 128 EVP_PKEY_assign_RSA(out, rsa); 129 return 1; 130 } 131 132 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) { 133 return BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) == 0 && 134 BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) == 0; 135 } 136 137 static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) { 138 CBB pkcs8, algorithm, oid, null, private_key; 139 if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) || 140 !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) || 141 !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) || 142 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) || 143 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) || 144 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) || 145 !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) || 146 !RSA_marshal_private_key(&private_key, key->pkey.rsa) || 147 !CBB_flush(out)) { 148 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR); 149 return 0; 150 } 151 152 return 1; 153 } 154 155 static int rsa_priv_decode(EVP_PKEY *out, CBS *params, CBS *key) { 156 /* Per RFC 3447, A.1, the parameters have type NULL. */ 157 CBS null; 158 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) || 159 CBS_len(&null) != 0 || 160 CBS_len(params) != 0) { 161 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 162 return 0; 163 } 164 165 RSA *rsa = RSA_parse_private_key(key); 166 if (rsa == NULL || CBS_len(key) != 0) { 167 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 168 RSA_free(rsa); 169 return 0; 170 } 171 172 EVP_PKEY_assign_RSA(out, rsa); 173 return 1; 174 } 175 176 static int rsa_opaque(const EVP_PKEY *pkey) { 177 return RSA_is_opaque(pkey->pkey.rsa); 178 } 179 180 static int int_rsa_size(const EVP_PKEY *pkey) { 181 return RSA_size(pkey->pkey.rsa); 182 } 183 184 static int rsa_bits(const EVP_PKEY *pkey) { 185 return BN_num_bits(pkey->pkey.rsa->n); 186 } 187 188 static void int_rsa_free(EVP_PKEY *pkey) { RSA_free(pkey->pkey.rsa); } 189 190 const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = { 191 EVP_PKEY_RSA, 192 /* 1.2.840.113549.1.1.1 */ 193 {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01}, 9, 194 195 rsa_pub_decode, 196 rsa_pub_encode, 197 rsa_pub_cmp, 198 199 rsa_priv_decode, 200 rsa_priv_encode, 201 202 rsa_opaque, 203 204 int_rsa_size, 205 rsa_bits, 206 207 0,0,0, 208 209 int_rsa_free, 210 }; 211
