1 /*
2 * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /*
11 * RSA low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <stdio.h>
17 #include "internal/cryptlib.h"
18 #include <openssl/bn.h>
19 #include <openssl/x509.h>
20 #include <openssl/asn1t.h>
21 #include "rsa_local.h"
22
23 /*
24 * Override the default free and new methods,
25 * and calculate helper products for multi-prime
26 * RSA keys.
27 */
rsa_cb(int operation,ASN1_VALUE ** pval,const ASN1_ITEM * it,void * exarg)28 static int rsa_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
29 void *exarg)
30 {
31 if (operation == ASN1_OP_NEW_PRE) {
32 *pval = (ASN1_VALUE *)RSA_new();
33 if (*pval != NULL)
34 return 2;
35 return 0;
36 } else if (operation == ASN1_OP_FREE_PRE) {
37 RSA_free((RSA *)*pval);
38 *pval = NULL;
39 return 2;
40 } else if (operation == ASN1_OP_D2I_POST) {
41 if (((RSA *)*pval)->version != RSA_ASN1_VERSION_MULTI) {
42 /* not a multi-prime key, skip */
43 return 1;
44 }
45 return (ossl_rsa_multip_calc_product((RSA *)*pval) == 1) ? 2 : 0;
46 }
47 return 1;
48 }
49
50 /* Based on definitions in RFC 8017 appendix A.1.2 */
51 ASN1_SEQUENCE(RSA_PRIME_INFO) = {
52 ASN1_SIMPLE(RSA_PRIME_INFO, r, CBIGNUM),
53 ASN1_SIMPLE(RSA_PRIME_INFO, d, CBIGNUM),
54 ASN1_SIMPLE(RSA_PRIME_INFO, t, CBIGNUM),
55 } ASN1_SEQUENCE_END(RSA_PRIME_INFO)
56
57 ASN1_SEQUENCE_cb(RSAPrivateKey, rsa_cb) = {
58 ASN1_EMBED(RSA, version, INT32),
59 ASN1_SIMPLE(RSA, n, BIGNUM),
60 ASN1_SIMPLE(RSA, e, BIGNUM),
61 ASN1_SIMPLE(RSA, d, CBIGNUM),
62 ASN1_SIMPLE(RSA, p, CBIGNUM),
63 ASN1_SIMPLE(RSA, q, CBIGNUM),
64 ASN1_SIMPLE(RSA, dmp1, CBIGNUM),
65 ASN1_SIMPLE(RSA, dmq1, CBIGNUM),
66 ASN1_SIMPLE(RSA, iqmp, CBIGNUM),
67 ASN1_SEQUENCE_OF_OPT(RSA, prime_infos, RSA_PRIME_INFO)
68 } ASN1_SEQUENCE_END_cb(RSA, RSAPrivateKey)
69
70
71 ASN1_SEQUENCE_cb(RSAPublicKey, rsa_cb) = {
72 ASN1_SIMPLE(RSA, n, BIGNUM),
73 ASN1_SIMPLE(RSA, e, BIGNUM),
74 } ASN1_SEQUENCE_END_cb(RSA, RSAPublicKey)
75
76 /* Free up maskHash */
77 static int rsa_pss_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
78 void *exarg)
79 {
80 if (operation == ASN1_OP_FREE_PRE) {
81 RSA_PSS_PARAMS *pss = (RSA_PSS_PARAMS *)*pval;
82 X509_ALGOR_free(pss->maskHash);
83 }
84 return 1;
85 }
86
87 ASN1_SEQUENCE_cb(RSA_PSS_PARAMS, rsa_pss_cb) = {
88 ASN1_EXP_OPT(RSA_PSS_PARAMS, hashAlgorithm, X509_ALGOR,0),
89 ASN1_EXP_OPT(RSA_PSS_PARAMS, maskGenAlgorithm, X509_ALGOR,1),
90 ASN1_EXP_OPT(RSA_PSS_PARAMS, saltLength, ASN1_INTEGER,2),
91 ASN1_EXP_OPT(RSA_PSS_PARAMS, trailerField, ASN1_INTEGER,3)
92 } ASN1_SEQUENCE_END_cb(RSA_PSS_PARAMS, RSA_PSS_PARAMS)
93
94 IMPLEMENT_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
95 IMPLEMENT_ASN1_DUP_FUNCTION(RSA_PSS_PARAMS)
96
97 /* Free up maskHash */
98 static int rsa_oaep_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
99 void *exarg)
100 {
101 if (operation == ASN1_OP_FREE_PRE) {
102 RSA_OAEP_PARAMS *oaep = (RSA_OAEP_PARAMS *)*pval;
103 X509_ALGOR_free(oaep->maskHash);
104 }
105 return 1;
106 }
107
108 ASN1_SEQUENCE_cb(RSA_OAEP_PARAMS, rsa_oaep_cb) = {
109 ASN1_EXP_OPT(RSA_OAEP_PARAMS, hashFunc, X509_ALGOR, 0),
110 ASN1_EXP_OPT(RSA_OAEP_PARAMS, maskGenFunc, X509_ALGOR, 1),
111 ASN1_EXP_OPT(RSA_OAEP_PARAMS, pSourceFunc, X509_ALGOR, 2),
112 } ASN1_SEQUENCE_END_cb(RSA_OAEP_PARAMS, RSA_OAEP_PARAMS)
113
114 IMPLEMENT_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)
115
116 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(RSA, RSAPrivateKey, RSAPrivateKey)
117
118 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(RSA, RSAPublicKey, RSAPublicKey)
119
120 RSA *RSAPublicKey_dup(const RSA *rsa)
121 {
122 return ASN1_item_dup(ASN1_ITEM_rptr(RSAPublicKey), rsa);
123 }
124
RSAPrivateKey_dup(const RSA * rsa)125 RSA *RSAPrivateKey_dup(const RSA *rsa)
126 {
127 return ASN1_item_dup(ASN1_ITEM_rptr(RSAPrivateKey), rsa);
128 }
129