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126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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 "internal/cryptlib.h"
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#include <openssl/bn.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/engine.h>
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#include <openssl/x509.h>
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#include <openssl/asn1.h>
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#include "internal/asn1_int.h"
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#include "internal/evp_int.h"
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EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
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long length)
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{
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EVP_PKEY *ret;
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const unsigned char *p = *pp;
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if ((a == NULL) || (*a == NULL)) {
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if ((ret = EVP_PKEY_new()) == NULL) {
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ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_EVP_LIB);
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return (NULL);
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}
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} else {
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ret = *a;
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(ret->engine);
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ret->engine = NULL;
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#endif
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}
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if (!EVP_PKEY_set_type(ret, type)) {
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ASN1err(ASN1_F_D2I_PRIVATEKEY, ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);
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goto err;
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}
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if (!ret->ameth->old_priv_decode ||
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!ret->ameth->old_priv_decode(ret, &p, length)) {
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if (ret->ameth->priv_decode) {
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EVP_PKEY *tmp;
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PKCS8_PRIV_KEY_INFO *p8 = NULL;
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p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, length);
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if (!p8)
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goto err;
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tmp = EVP_PKCS82PKEY(p8);
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PKCS8_PRIV_KEY_INFO_free(p8);
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if (tmp == NULL)
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goto err;
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EVP_PKEY_free(ret);
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ret = tmp;
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} else {
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ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);
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goto err;
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}
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}
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*pp = p;
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if (a != NULL)
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(*a) = ret;
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return (ret);
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err:
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if (a == NULL || *a != ret)
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EVP_PKEY_free(ret);
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return (NULL);
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}
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/*
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* This works like d2i_PrivateKey() except it automatically works out the
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* type
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*/
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EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
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long length)
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{
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STACK_OF(ASN1_TYPE) *inkey;
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const unsigned char *p;
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int keytype;
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p = *pp;
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/*
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* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE): by
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* analyzing it we can determine the passed structure: this assumes the
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* input is surrounded by an ASN1 SEQUENCE.
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*/
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inkey = d2i_ASN1_SEQUENCE_ANY(NULL, &p, length);
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p = *pp;
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/*
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* Since we only need to discern "traditional format" RSA and DSA keys we
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* can just count the elements.
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*/
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if (sk_ASN1_TYPE_num(inkey) == 6)
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keytype = EVP_PKEY_DSA;
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else if (sk_ASN1_TYPE_num(inkey) == 4)
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keytype = EVP_PKEY_EC;
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else if (sk_ASN1_TYPE_num(inkey) == 3) { /* This seems to be PKCS8, not
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* traditional format */
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PKCS8_PRIV_KEY_INFO *p8 = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, length);
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EVP_PKEY *ret;
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sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
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if (!p8) {
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ASN1err(ASN1_F_D2I_AUTOPRIVATEKEY,
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ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
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return NULL;
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}
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ret = EVP_PKCS82PKEY(p8);
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PKCS8_PRIV_KEY_INFO_free(p8);
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if (ret == NULL)
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return NULL;
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*pp = p;
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if (a) {
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*a = ret;
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}
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return ret;
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} else
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keytype = EVP_PKEY_RSA;
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sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);
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return d2i_PrivateKey(keytype, a, pp, length);
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}
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