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52ce351a67
We can easily find out the keytype which should significantly improve the performance of this function because we don't have to try every loaded decoder. Partial fix for #20399 Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com> Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20412)
268 lines
7.7 KiB
C
268 lines
7.7 KiB
C
/*
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* Copyright 1999-2021 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 <stdio.h>
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#include <stdlib.h>
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#include "internal/cryptlib.h"
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#include <openssl/x509.h>
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#include <openssl/rand.h>
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#include <openssl/encoder.h>
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#include <openssl/decoder.h>
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#include "internal/provider.h"
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#include "internal/sizes.h"
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#include "crypto/asn1.h"
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#include "crypto/evp.h"
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#include "crypto/x509.h"
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/* Extract a private key from a PKCS8 structure */
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EVP_PKEY *evp_pkcs82pkey_legacy(const PKCS8_PRIV_KEY_INFO *p8, OSSL_LIB_CTX *libctx,
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const char *propq)
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{
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EVP_PKEY *pkey = NULL;
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const ASN1_OBJECT *algoid;
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char obj_tmp[80];
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if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8))
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return NULL;
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if ((pkey = EVP_PKEY_new()) == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
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return NULL;
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}
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if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
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i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
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ERR_raise_data(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM,
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"TYPE=%s", obj_tmp);
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goto error;
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}
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if (pkey->ameth->priv_decode_ex != NULL) {
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if (!pkey->ameth->priv_decode_ex(pkey, p8, libctx, propq))
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goto error;
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} else if (pkey->ameth->priv_decode != NULL) {
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if (!pkey->ameth->priv_decode(pkey, p8)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_PRIVATE_KEY_DECODE_ERROR);
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goto error;
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}
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} else {
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ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
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goto error;
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}
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return pkey;
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error:
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EVP_PKEY_free(pkey);
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return NULL;
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}
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EVP_PKEY *EVP_PKCS82PKEY_ex(const PKCS8_PRIV_KEY_INFO *p8, OSSL_LIB_CTX *libctx,
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const char *propq)
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{
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EVP_PKEY *pkey = NULL;
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const unsigned char *p8_data = NULL;
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unsigned char *encoded_data = NULL;
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int encoded_len;
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int selection;
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size_t len;
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OSSL_DECODER_CTX *dctx = NULL;
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const ASN1_OBJECT *algoid = NULL;
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char keytype[OSSL_MAX_NAME_SIZE];
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if (p8 == NULL
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|| !PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8)
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|| !OBJ_obj2txt(keytype, sizeof(keytype), algoid, 0))
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return NULL;
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if ((encoded_len = i2d_PKCS8_PRIV_KEY_INFO(p8, &encoded_data)) <= 0
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|| encoded_data == NULL)
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return NULL;
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p8_data = encoded_data;
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len = encoded_len;
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selection = EVP_PKEY_KEYPAIR | EVP_PKEY_KEY_PARAMETERS;
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dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "DER", "PrivateKeyInfo",
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keytype, selection, libctx, propq);
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if (dctx != NULL && OSSL_DECODER_CTX_get_num_decoders(dctx) == 0) {
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OSSL_DECODER_CTX_free(dctx);
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/*
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* This could happen if OBJ_obj2txt() returned a text OID and the
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* decoder has not got that OID as an alias. We fall back to a NULL
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* keytype
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*/
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dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, "DER", "PrivateKeyInfo",
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NULL, selection, libctx, propq);
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}
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if (dctx == NULL
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|| !OSSL_DECODER_from_data(dctx, &p8_data, &len))
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/* try legacy */
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pkey = evp_pkcs82pkey_legacy(p8, libctx, propq);
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OPENSSL_clear_free(encoded_data, encoded_len);
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OSSL_DECODER_CTX_free(dctx);
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return pkey;
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}
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EVP_PKEY *EVP_PKCS82PKEY(const PKCS8_PRIV_KEY_INFO *p8)
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{
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return EVP_PKCS82PKEY_ex(p8, NULL, NULL);
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}
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/* Turn a private key into a PKCS8 structure */
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PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(const EVP_PKEY *pkey)
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{
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PKCS8_PRIV_KEY_INFO *p8 = NULL;
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OSSL_ENCODER_CTX *ctx = NULL;
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/*
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* The implementation for provider-native keys is to encode the
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* key to a DER encoded PKCS#8 structure, then convert it to a
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* PKCS8_PRIV_KEY_INFO with good old d2i functions.
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*/
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if (evp_pkey_is_provided(pkey)) {
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int selection = OSSL_KEYMGMT_SELECT_ALL;
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unsigned char *der = NULL;
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size_t derlen = 0;
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const unsigned char *pp;
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if ((ctx = OSSL_ENCODER_CTX_new_for_pkey(pkey, selection,
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"DER", "PrivateKeyInfo",
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NULL)) == NULL
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|| !OSSL_ENCODER_to_data(ctx, &der, &derlen))
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goto error;
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pp = der;
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p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &pp, (long)derlen);
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OPENSSL_free(der);
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if (p8 == NULL)
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goto error;
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} else {
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p8 = PKCS8_PRIV_KEY_INFO_new();
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if (p8 == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_ASN1_LIB);
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return NULL;
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}
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if (pkey->ameth != NULL) {
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if (pkey->ameth->priv_encode != NULL) {
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if (!pkey->ameth->priv_encode(p8, pkey)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_PRIVATE_KEY_ENCODE_ERROR);
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goto error;
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}
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} else {
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ERR_raise(ERR_LIB_EVP, EVP_R_METHOD_NOT_SUPPORTED);
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goto error;
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}
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} else {
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ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
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goto error;
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}
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}
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goto end;
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error:
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PKCS8_PRIV_KEY_INFO_free(p8);
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p8 = NULL;
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end:
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OSSL_ENCODER_CTX_free(ctx);
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return p8;
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}
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/* EVP_PKEY attribute functions */
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int EVP_PKEY_get_attr_count(const EVP_PKEY *key)
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{
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return X509at_get_attr_count(key->attributes);
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}
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int EVP_PKEY_get_attr_by_NID(const EVP_PKEY *key, int nid, int lastpos)
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{
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return X509at_get_attr_by_NID(key->attributes, nid, lastpos);
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}
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int EVP_PKEY_get_attr_by_OBJ(const EVP_PKEY *key, const ASN1_OBJECT *obj,
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int lastpos)
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{
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return X509at_get_attr_by_OBJ(key->attributes, obj, lastpos);
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}
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X509_ATTRIBUTE *EVP_PKEY_get_attr(const EVP_PKEY *key, int loc)
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{
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return X509at_get_attr(key->attributes, loc);
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}
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X509_ATTRIBUTE *EVP_PKEY_delete_attr(EVP_PKEY *key, int loc)
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{
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return X509at_delete_attr(key->attributes, loc);
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}
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int EVP_PKEY_add1_attr(EVP_PKEY *key, X509_ATTRIBUTE *attr)
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{
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if (X509at_add1_attr(&key->attributes, attr))
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return 1;
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return 0;
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}
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int EVP_PKEY_add1_attr_by_OBJ(EVP_PKEY *key,
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const ASN1_OBJECT *obj, int type,
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const unsigned char *bytes, int len)
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{
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if (X509at_add1_attr_by_OBJ(&key->attributes, obj, type, bytes, len))
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return 1;
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return 0;
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}
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int EVP_PKEY_add1_attr_by_NID(EVP_PKEY *key,
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int nid, int type,
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const unsigned char *bytes, int len)
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{
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if (X509at_add1_attr_by_NID(&key->attributes, nid, type, bytes, len))
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return 1;
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return 0;
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}
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int EVP_PKEY_add1_attr_by_txt(EVP_PKEY *key,
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const char *attrname, int type,
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const unsigned char *bytes, int len)
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{
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if (X509at_add1_attr_by_txt(&key->attributes, attrname, type, bytes, len))
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return 1;
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return 0;
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}
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const char *EVP_PKEY_get0_type_name(const EVP_PKEY *key)
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{
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const EVP_PKEY_ASN1_METHOD *ameth;
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const char *name = NULL;
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if (key->keymgmt != NULL)
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return EVP_KEYMGMT_get0_name(key->keymgmt);
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/* Otherwise fallback to legacy */
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ameth = EVP_PKEY_get0_asn1(key);
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if (ameth != NULL)
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EVP_PKEY_asn1_get0_info(NULL, NULL,
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NULL, NULL, &name, ameth);
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return name;
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}
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const OSSL_PROVIDER *EVP_PKEY_get0_provider(const EVP_PKEY *key)
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{
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if (evp_pkey_is_provided(key))
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return EVP_KEYMGMT_get0_provider(key->keymgmt);
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return NULL;
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}
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