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6a2b8ff392
This has us switch from the 'structure' "pkcs8" to "PrivateKeyInfo", which is sensible considering we already have "SubjectPublicKeyInfo". We also add "EncryptedPrivateKeyInfo", and use it for a special decoder that detects and decrypts an EncryptedPrivateKeyInfo structured DER blob into a PrivateKeyInfo structured DER blob and passes that on to the next decoder implementation. The result of this change is that PKCS#8 decryption should only happen once per decoding instead of once for every expected key type. Furthermore, this new decoder implementation sets the data type to the OID of the algorithmIdentifier field, thus reducing how many decoder implementations are tentativaly run further down the call chain. Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15498)
168 lines
9.2 KiB
C
168 lines
9.2 KiB
C
/*
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* Copyright 2019-2021 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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#include <openssl/core_dispatch.h>
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#include <openssl/pem.h>
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#include <openssl/encoder.h>
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/*
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* Selectors, named according to the ASN.1 names used throughout libcrypto.
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*
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* Note that these are not absolutely mandatory, they are rather a wishlist
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* of sorts. The provider implementations are free to make choices that
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* make sense for them, based on these selectors.
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* For example, the EC backend is likely to really just output the private
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* key to a PKCS#8 structure, even thought PEM_SELECTION_PrivateKey specifies
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* the public key as well. This is fine, as long as the corresponding
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* decoding operation can return an object that contains what libcrypto
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* expects.
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*/
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# define PEM_SELECTION_PUBKEY EVP_PKEY_PUBLIC_KEY
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# define PEM_SELECTION_PrivateKey EVP_PKEY_KEYPAIR
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# define PEM_SELECTION_Parameters EVP_PKEY_KEY_PARAMETERS
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/*
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* Properties, named according to the ASN.1 names used throughout libcrypto.
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*/
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# define PEM_STRUCTURE_PUBKEY "SubjectPublicKeyInfo"
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# define PEM_STRUCTURE_PrivateKey "PrivateKeyInfo"
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# define PEM_STRUCTURE_Parameters "type-specific"
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# define PEM_STRUCTURE_RSAPrivateKey "type-specific"
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# define PEM_STRUCTURE_RSAPublicKey "type-specific"
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/* Alternative IMPLEMENT macros for provided encoders */
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# define IMPLEMENT_PEM_provided_write_body_vars(type, asn1, pq) \
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int ret = 0; \
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OSSL_ENCODER_CTX *ctx = \
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OSSL_ENCODER_CTX_new_for_##type(x, PEM_SELECTION_##asn1, \
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"PEM", PEM_STRUCTURE_##asn1, \
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(pq)); \
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\
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if (OSSL_ENCODER_CTX_get_num_encoders(ctx) == 0) { \
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OSSL_ENCODER_CTX_free(ctx); \
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goto legacy; \
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}
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# define IMPLEMENT_PEM_provided_write_body_pass() \
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ret = 1; \
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if (kstr == NULL && cb == NULL) { \
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if (u != NULL) { \
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kstr = u; \
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klen = strlen(u); \
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} else { \
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cb = PEM_def_callback; \
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} \
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} \
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if (enc != NULL) { \
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ret = 0; \
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if (OSSL_ENCODER_CTX_set_cipher(ctx, EVP_CIPHER_get0_name(enc), \
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NULL)) { \
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ret = 1; \
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if (kstr != NULL \
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&& !OSSL_ENCODER_CTX_set_passphrase(ctx, kstr, klen)) \
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ret = 0; \
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else if (cb != NULL \
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&& !OSSL_ENCODER_CTX_set_pem_password_cb(ctx, \
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cb, u)) \
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ret = 0; \
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} \
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} \
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if (!ret) { \
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OSSL_ENCODER_CTX_free(ctx); \
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return 0; \
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}
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# define IMPLEMENT_PEM_provided_write_body_main(type, outtype) \
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ret = OSSL_ENCODER_to_##outtype(ctx, out); \
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OSSL_ENCODER_CTX_free(ctx); \
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return ret
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# define IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
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writename) \
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legacy: \
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return PEM_ASN1_##writename((i2d_of_void *)i2d_##asn1, str, out, \
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x, NULL, NULL, 0, NULL, NULL)
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# define IMPLEMENT_PEM_provided_write_body_fallback_cb(str, asn1, \
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writename) \
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legacy: \
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return PEM_ASN1_##writename##((i2d_of_void *)i2d_##asn1, str, out, \
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x, enc, kstr, klen, cb, u)
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# define IMPLEMENT_PEM_provided_write_to(name, TYPE, type, str, asn1, \
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OUTTYPE, outtype, writename) \
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PEM_write_fnsig(name, TYPE, OUTTYPE, writename) \
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{ \
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IMPLEMENT_PEM_provided_write_body_vars(type, asn1, NULL); \
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IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
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IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
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writename); \
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} \
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PEM_write_ex_fnsig(name, TYPE, OUTTYPE, writename) \
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{ \
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IMPLEMENT_PEM_provided_write_body_vars(type, asn1, propq); \
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IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
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IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
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writename); \
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}
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# define IMPLEMENT_PEM_provided_write_cb_to(name, TYPE, type, str, asn1, \
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OUTTYPE, outtype, writename) \
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PEM_write_cb_fnsig(name, TYPE, OUTTYPE, writename) \
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{ \
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IMPLEMENT_PEM_provided_write_body_vars(type, asn1, NULL); \
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IMPLEMENT_PEM_provided_write_body_pass(); \
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IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
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IMPLEMENT_PEM_provided_write_body_fallback_cb(str, asn1, \
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writename); \
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} \
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PEM_write_ex_cb_fnsig(name, TYPE, OUTTYPE, writename) \
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{ \
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IMPLEMENT_PEM_provided_write_body_vars(type, asn1, propq); \
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IMPLEMENT_PEM_provided_write_body_pass(); \
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IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
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IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
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writename); \
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}
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# ifdef OPENSSL_NO_STDIO
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# define IMPLEMENT_PEM_provided_write_fp(name, TYPE, type, str, asn1)
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# define IMPLEMENT_PEM_provided_write_cb_fp(name, TYPE, type, str, asn1)
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# else
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# define IMPLEMENT_PEM_provided_write_fp(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_to(name, TYPE, type, str, asn1, FILE, fp, write)
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# define IMPLEMENT_PEM_provided_write_cb_fp(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_cb_to(name, TYPE, type, str, asn1, FILE, fp, write)
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# endif
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# define IMPLEMENT_PEM_provided_write_bio(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_to(name, TYPE, type, str, asn1, BIO, bio, write_bio)
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# define IMPLEMENT_PEM_provided_write_cb_bio(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_cb_to(name, TYPE, type, str, asn1, BIO, bio, write_bio)
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# define IMPLEMENT_PEM_provided_write(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_bio(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_fp(name, TYPE, type, str, asn1)
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# define IMPLEMENT_PEM_provided_write_cb(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_cb_bio(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_provided_write_cb_fp(name, TYPE, type, str, asn1)
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# define IMPLEMENT_PEM_provided_rw(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_read(name, TYPE, str, asn1) \
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IMPLEMENT_PEM_provided_write(name, TYPE, type, str, asn1)
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# define IMPLEMENT_PEM_provided_rw_cb(name, TYPE, type, str, asn1) \
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IMPLEMENT_PEM_read(name, TYPE, str, asn1) \
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IMPLEMENT_PEM_provided_write_cb(name, TYPE, type, str, asn1)
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