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 68 69 static int rsa_pub_encode(CBB *out, const EVP_PKEY *key) { 70 // See RFC 3279, section 2.3.1. 71 CBB spki, algorithm, oid, null, key_bitstring; 72 if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) || 73 !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) || 74 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) || 75 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) || 76 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) || 77 !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) || 78 !CBB_add_u8(&key_bitstring, 0 /* padding */) || 79 !RSA_marshal_public_key(&key_bitstring, key->pkey.rsa) || 80 !CBB_flush(out)) { 81 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR); 82 return 0; 83 } 84 85 return 1; 86 } 87 88 static int rsa_pub_decode(EVP_PKEY *out, CBS *params, CBS *key) { 89 // See RFC 3279, section 2.3.1. 90 91 // The parameters must be NULL. 92 CBS null; 93 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) || 94 CBS_len(&null) != 0 || 95 CBS_len(params) != 0) { 96 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 97 return 0; 98 } 99 100 RSA *rsa = RSA_parse_public_key(key); 101 if (rsa == NULL || CBS_len(key) != 0) { 102 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 103 RSA_free(rsa); 104 return 0; 105 } 106 107 EVP_PKEY_assign_RSA(out, rsa); 108 return 1; 109 } 110 111 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) { 112 return BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) == 0 && 113 BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) == 0; 114 } 115 116 static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) { 117 CBB pkcs8, algorithm, oid, null, private_key; 118 if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) || 119 !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) || 120 !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) || 121 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) || 122 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) || 123 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) || 124 !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) || 125 !RSA_marshal_private_key(&private_key, key->pkey.rsa) || 126 !CBB_flush(out)) { 127 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR); 128 return 0; 129 } 130 131 return 1; 132 } 133 134 static int rsa_priv_decode(EVP_PKEY *out, CBS *params, CBS *key) { 135 // Per RFC 3447, A.1, the parameters have type NULL. 136 CBS null; 137 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) || 138 CBS_len(&null) != 0 || 139 CBS_len(params) != 0) { 140 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 141 return 0; 142 } 143 144 RSA *rsa = RSA_parse_private_key(key); 145 if (rsa == NULL || CBS_len(key) != 0) { 146 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR); 147 RSA_free(rsa); 148 return 0; 149 } 150 151 EVP_PKEY_assign_RSA(out, rsa); 152 return 1; 153 } 154 155 static int rsa_opaque(const EVP_PKEY *pkey) { 156 return RSA_is_opaque(pkey->pkey.rsa); 157 } 158 159 static int int_rsa_size(const EVP_PKEY *pkey) { 160 return RSA_size(pkey->pkey.rsa); 161 } 162 163 static int rsa_bits(const EVP_PKEY *pkey) { 164 return RSA_bits(pkey->pkey.rsa); 165 } 166 167 static void int_rsa_free(EVP_PKEY *pkey) { RSA_free(pkey->pkey.rsa); } 168 169 const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = { 170 EVP_PKEY_RSA, 171 // 1.2.840.113549.1.1.1 172 {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01}, 9, 173 174 rsa_pub_decode, 175 rsa_pub_encode, 176 rsa_pub_cmp, 177 178 rsa_priv_decode, 179 rsa_priv_encode, 180 181 rsa_opaque, 182 183 int_rsa_size, 184 rsa_bits, 185 186 0,0,0, 187 188 int_rsa_free, 189 }; 190
