401 lines
16 KiB
C
401 lines
16 KiB
C
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/*
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* Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* RSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <openssl/obj_mac.h>
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#include "internal/cryptlib.h"
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#include "prov/der_rsa.h"
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#include "prov/der_digests.h"
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/* More complex pre-compiled sequences. */
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/*-
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* From https://tools.ietf.org/html/rfc8017#appendix-A.2.1
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*
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* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
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* { OID id-sha1 PARAMETERS NULL }|
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* { OID id-sha224 PARAMETERS NULL }|
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* { OID id-sha256 PARAMETERS NULL }|
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* { OID id-sha384 PARAMETERS NULL }|
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* { OID id-sha512 PARAMETERS NULL }|
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* { OID id-sha512-224 PARAMETERS NULL }|
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* { OID id-sha512-256 PARAMETERS NULL },
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* ... -- Allows for future expansion --
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* }
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*/
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#define DER_V_NULL DER_P_NULL, 0
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#define DER_SZ_NULL 2
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/*
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* The names for the hash function AlgorithmIdentifiers are borrowed and
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* expanded from https://tools.ietf.org/html/rfc4055#section-2.1
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*
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* sha1Identifier AlgorithmIdentifier ::= { id-sha1, NULL }
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* sha224Identifier AlgorithmIdentifier ::= { id-sha224, NULL }
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* sha256Identifier AlgorithmIdentifier ::= { id-sha256, NULL }
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* sha384Identifier AlgorithmIdentifier ::= { id-sha384, NULL }
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* sha512Identifier AlgorithmIdentifier ::= { id-sha512, NULL }
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*/
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/*
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* NOTE: Some of the arrays aren't used other than inside sizeof(), which
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* clang complains about (-Wno-unneeded-internal-declaration). To get
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* around that, we make them non-static, and declare them an extra time to
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* avoid compilers complaining about definitions without declarations.
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*/
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#define DER_AID_V_sha1Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha1 + DER_SZ_NULL, \
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DER_OID_V_id_sha1, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha1Identifier[];
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const unsigned char ossl_der_aid_sha1Identifier[] = {
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DER_AID_V_sha1Identifier
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};
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#define DER_AID_SZ_sha1Identifier sizeof(ossl_der_aid_sha1Identifier)
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#define DER_AID_V_sha224Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha224 + DER_SZ_NULL, \
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DER_OID_V_id_sha224, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha224Identifier[];
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const unsigned char ossl_der_aid_sha224Identifier[] = {
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DER_AID_V_sha224Identifier
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};
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#define DER_AID_SZ_sha224Identifier sizeof(ossl_der_aid_sha224Identifier)
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#define DER_AID_V_sha256Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha256 + DER_SZ_NULL, \
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DER_OID_V_id_sha256, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha256Identifier[];
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const unsigned char ossl_der_aid_sha256Identifier[] = {
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DER_AID_V_sha256Identifier
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};
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#define DER_AID_SZ_sha256Identifier sizeof(ossl_der_aid_sha256Identifier)
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#define DER_AID_V_sha384Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha384 + DER_SZ_NULL, \
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DER_OID_V_id_sha384, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha384Identifier[];
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const unsigned char ossl_der_aid_sha384Identifier[] = {
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DER_AID_V_sha384Identifier
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};
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#define DER_AID_SZ_sha384Identifier sizeof(ossl_der_aid_sha384Identifier)
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#define DER_AID_V_sha512Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha512 + DER_SZ_NULL, \
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DER_OID_V_id_sha512, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha512Identifier[];
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const unsigned char ossl_der_aid_sha512Identifier[] = {
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DER_AID_V_sha512Identifier
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};
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#define DER_AID_SZ_sha512Identifier sizeof(ossl_der_aid_sha512Identifier)
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#define DER_AID_V_sha512_224Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha512_224 + DER_SZ_NULL, \
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DER_OID_V_id_sha512_224, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha512_224Identifier[];
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const unsigned char ossl_der_aid_sha512_224Identifier[] = {
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DER_AID_V_sha512_224Identifier
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};
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#define DER_AID_SZ_sha512_224Identifier sizeof(ossl_der_aid_sha512_224Identifier)
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#define DER_AID_V_sha512_256Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_sha512_256 + DER_SZ_NULL, \
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DER_OID_V_id_sha512_256, \
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DER_V_NULL
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extern const unsigned char ossl_der_aid_sha512_256Identifier[];
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const unsigned char ossl_der_aid_sha512_256Identifier[] = {
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DER_AID_V_sha512_256Identifier
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};
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#define DER_AID_SZ_sha512_256Identifier sizeof(ossl_der_aid_sha512_256Identifier)
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/*-
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* From https://tools.ietf.org/html/rfc8017#appendix-A.2.1
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*
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* HashAlgorithm ::= AlgorithmIdentifier {
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* {OAEP-PSSDigestAlgorithms}
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* }
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*
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* ...
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*
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* PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= {
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* { OID id-mgf1 PARAMETERS HashAlgorithm },
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* ... -- Allows for future expansion --
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* }
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*/
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/*
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* The names for the MGF1 AlgorithmIdentifiers are borrowed and expanded
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* from https://tools.ietf.org/html/rfc4055#section-2.1
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*
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* mgf1SHA1Identifier AlgorithmIdentifier ::=
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* { id-mgf1, sha1Identifier }
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* mgf1SHA224Identifier AlgorithmIdentifier ::=
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* { id-mgf1, sha224Identifier }
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* mgf1SHA256Identifier AlgorithmIdentifier ::=
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* { id-mgf1, sha256Identifier }
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* mgf1SHA384Identifier AlgorithmIdentifier ::=
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* { id-mgf1, sha384Identifier }
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* mgf1SHA512Identifier AlgorithmIdentifier ::=
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* { id-mgf1, sha512Identifier }
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*/
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#if 0 /* Currently unused */
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#define DER_AID_V_mgf1SHA1Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha1Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha1Identifier
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static const unsigned char der_aid_mgf1SHA1Identifier[] = {
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DER_AID_V_mgf1SHA1Identifier
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};
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#define DER_AID_SZ_mgf1SHA1Identifier sizeof(der_aid_mgf1SHA1Identifier)
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#endif
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#define DER_AID_V_mgf1SHA224Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha224Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha224Identifier
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static const unsigned char der_aid_mgf1SHA224Identifier[] = {
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DER_AID_V_mgf1SHA224Identifier
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};
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#define DER_AID_SZ_mgf1SHA224Identifier sizeof(der_aid_mgf1SHA224Identifier)
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#define DER_AID_V_mgf1SHA256Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha256Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha256Identifier
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static const unsigned char der_aid_mgf1SHA256Identifier[] = {
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DER_AID_V_mgf1SHA256Identifier
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};
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#define DER_AID_SZ_mgf1SHA256Identifier sizeof(der_aid_mgf1SHA256Identifier)
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#define DER_AID_V_mgf1SHA384Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha384Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha384Identifier
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static const unsigned char der_aid_mgf1SHA384Identifier[] = {
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DER_AID_V_mgf1SHA384Identifier
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};
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#define DER_AID_SZ_mgf1SHA384Identifier sizeof(der_aid_mgf1SHA384Identifier)
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#define DER_AID_V_mgf1SHA512Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha512Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha512Identifier
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static const unsigned char der_aid_mgf1SHA512Identifier[] = {
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DER_AID_V_mgf1SHA512Identifier
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};
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#define DER_AID_SZ_mgf1SHA512Identifier sizeof(der_aid_mgf1SHA512Identifier)
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#define DER_AID_V_mgf1SHA512_224Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha512_224Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha512_224Identifier
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static const unsigned char der_aid_mgf1SHA512_224Identifier[] = {
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DER_AID_V_mgf1SHA512_224Identifier
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};
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#define DER_AID_SZ_mgf1SHA512_224Identifier sizeof(der_aid_mgf1SHA512_224Identifier)
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#define DER_AID_V_mgf1SHA512_256Identifier \
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DER_P_SEQUENCE|DER_F_CONSTRUCTED, \
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DER_OID_SZ_id_mgf1 + DER_AID_SZ_sha512_256Identifier, \
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DER_OID_V_id_mgf1, \
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DER_AID_V_sha512_256Identifier
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static const unsigned char der_aid_mgf1SHA512_256Identifier[] = {
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DER_AID_V_mgf1SHA512_256Identifier
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};
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#define DER_AID_SZ_mgf1SHA512_256Identifier sizeof(der_aid_mgf1SHA512_256Identifier)
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#define MGF1_SHA_CASE(bits, var) \
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case NID_sha##bits: \
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var = der_aid_mgf1SHA##bits##Identifier; \
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var##_sz = sizeof(der_aid_mgf1SHA##bits##Identifier); \
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break;
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/*-
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* The name is borrowed from https://tools.ietf.org/html/rfc8017#appendix-A.2.1
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*
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* MaskGenAlgorithm ::= AlgorithmIdentifier { {PKCS1MGFAlgorithms} }
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*/
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static int DER_w_MaskGenAlgorithm(WPACKET *pkt, int tag,
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const RSA_PSS_PARAMS_30 *pss)
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{
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if (pss != NULL && ossl_rsa_pss_params_30_maskgenalg(pss) == NID_mgf1) {
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int maskgenhashalg_nid = ossl_rsa_pss_params_30_maskgenhashalg(pss);
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const unsigned char *maskgenalg = NULL;
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size_t maskgenalg_sz = 0;
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switch (maskgenhashalg_nid) {
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case NID_sha1:
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break;
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MGF1_SHA_CASE(224, maskgenalg);
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MGF1_SHA_CASE(256, maskgenalg);
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MGF1_SHA_CASE(384, maskgenalg);
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MGF1_SHA_CASE(512, maskgenalg);
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MGF1_SHA_CASE(512_224, maskgenalg);
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MGF1_SHA_CASE(512_256, maskgenalg);
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default:
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return 0;
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}
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/* If there is none (or it was the default), we write nothing */
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if (maskgenalg == NULL)
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return 1;
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return ossl_DER_w_precompiled(pkt, tag, maskgenalg, maskgenalg_sz);
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}
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return 0;
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}
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#define OAEP_PSS_MD_CASE(name, var) \
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case NID_##name: \
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var = ossl_der_aid_##name##Identifier; \
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var##_sz = sizeof(ossl_der_aid_##name##Identifier); \
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break;
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int ossl_DER_w_RSASSA_PSS_params(WPACKET *pkt, int tag,
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const RSA_PSS_PARAMS_30 *pss)
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{
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int hashalg_nid, default_hashalg_nid;
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int saltlen, default_saltlen;
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int trailerfield, default_trailerfield;
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const unsigned char *hashalg = NULL;
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size_t hashalg_sz = 0;
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/*
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* For an unrestricted key, this function should not have been called;
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* the caller must be in control, because unrestricted keys are permitted
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* in some situations (when encoding the public key in a SubjectKeyInfo,
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* for example) while not in others, and this function doesn't know the
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* intent. Therefore, we assert that here, the PSS parameters must show
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* that the key is restricted.
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*/
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if (!ossl_assert(pss != NULL
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&& !ossl_rsa_pss_params_30_is_unrestricted(pss)))
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return 0;
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hashalg_nid = ossl_rsa_pss_params_30_hashalg(pss);
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saltlen = ossl_rsa_pss_params_30_saltlen(pss);
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trailerfield = ossl_rsa_pss_params_30_trailerfield(pss);
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if (saltlen < 0) {
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ERR_raise(ERR_LIB_RSA, RSA_R_INVALID_SALT_LENGTH);
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return 0;
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}
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if (trailerfield != 1) {
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ERR_raise(ERR_LIB_RSA, RSA_R_INVALID_TRAILER);
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return 0;
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}
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/* Getting default values */
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default_hashalg_nid = ossl_rsa_pss_params_30_hashalg(NULL);
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default_saltlen = ossl_rsa_pss_params_30_saltlen(NULL);
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default_trailerfield = ossl_rsa_pss_params_30_trailerfield(NULL);
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/*
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|
* From https://tools.ietf.org/html/rfc8017#appendix-A.2.1:
|
||
|
|
*
|
||
|
|
* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
|
||
|
|
* { OID id-sha1 PARAMETERS NULL }|
|
||
|
|
* { OID id-sha224 PARAMETERS NULL }|
|
||
|
|
* { OID id-sha256 PARAMETERS NULL }|
|
||
|
|
* { OID id-sha384 PARAMETERS NULL }|
|
||
|
|
* { OID id-sha512 PARAMETERS NULL }|
|
||
|
|
* { OID id-sha512-224 PARAMETERS NULL }|
|
||
|
|
* { OID id-sha512-256 PARAMETERS NULL },
|
||
|
|
* ... -- Allows for future expansion --
|
||
|
|
* }
|
||
|
|
*/
|
||
|
|
switch (hashalg_nid) {
|
||
|
|
OAEP_PSS_MD_CASE(sha1, hashalg);
|
||
|
|
OAEP_PSS_MD_CASE(sha224, hashalg);
|
||
|
|
OAEP_PSS_MD_CASE(sha256, hashalg);
|
||
|
|
OAEP_PSS_MD_CASE(sha384, hashalg);
|
||
|
|
OAEP_PSS_MD_CASE(sha512, hashalg);
|
||
|
|
OAEP_PSS_MD_CASE(sha512_224, hashalg);
|
||
|
|
OAEP_PSS_MD_CASE(sha512_256, hashalg);
|
||
|
|
default:
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ossl_DER_w_begin_sequence(pkt, tag)
|
||
|
|
&& (trailerfield == default_trailerfield
|
||
|
|
|| ossl_DER_w_uint32(pkt, 3, (uint32_t)trailerfield))
|
||
|
|
&& (saltlen == default_saltlen || ossl_DER_w_uint32(pkt, 2, (uint32_t)saltlen))
|
||
|
|
&& DER_w_MaskGenAlgorithm(pkt, 1, pss)
|
||
|
|
&& (hashalg_nid == default_hashalg_nid
|
||
|
|
|| ossl_DER_w_precompiled(pkt, 0, hashalg, hashalg_sz))
|
||
|
|
&& ossl_DER_w_end_sequence(pkt, tag);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Aliases so we can have a uniform RSA_CASE */
|
||
|
|
#define ossl_der_oid_rsassaPss ossl_der_oid_id_RSASSA_PSS
|
||
|
|
|
||
|
|
#define RSA_CASE(name, var) \
|
||
|
|
var##_nid = NID_##name; \
|
||
|
|
var##_oid = ossl_der_oid_##name; \
|
||
|
|
var##_oid_sz = sizeof(ossl_der_oid_##name); \
|
||
|
|
break;
|
||
|
|
|
||
|
|
int ossl_DER_w_algorithmIdentifier_RSA_PSS(WPACKET *pkt, int tag,
|
||
|
|
int rsa_type,
|
||
|
|
const RSA_PSS_PARAMS_30 *pss)
|
||
|
|
{
|
||
|
|
int rsa_nid = NID_undef;
|
||
|
|
const unsigned char *rsa_oid = NULL;
|
||
|
|
size_t rsa_oid_sz = 0;
|
||
|
|
|
||
|
|
switch (rsa_type) {
|
||
|
|
case RSA_FLAG_TYPE_RSA:
|
||
|
|
RSA_CASE(rsaEncryption, rsa);
|
||
|
|
case RSA_FLAG_TYPE_RSASSAPSS:
|
||
|
|
RSA_CASE(rsassaPss, rsa);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (rsa_oid == NULL)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return ossl_DER_w_begin_sequence(pkt, tag)
|
||
|
|
&& (rsa_nid != NID_rsassaPss
|
||
|
|
|| ossl_rsa_pss_params_30_is_unrestricted(pss)
|
||
|
|
|| ossl_DER_w_RSASSA_PSS_params(pkt, -1, pss))
|
||
|
|
&& ossl_DER_w_precompiled(pkt, -1, rsa_oid, rsa_oid_sz)
|
||
|
|
&& ossl_DER_w_end_sequence(pkt, tag);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ossl_DER_w_algorithmIdentifier_RSA(WPACKET *pkt, int tag, RSA *rsa)
|
||
|
|
{
|
||
|
|
int rsa_type = RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK);
|
||
|
|
RSA_PSS_PARAMS_30 *pss_params = ossl_rsa_get0_pss_params_30(rsa);
|
||
|
|
|
||
|
|
return ossl_DER_w_algorithmIdentifier_RSA_PSS(pkt, tag, rsa_type,
|
||
|
|
pss_params);
|
||
|
|
}
|