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/*
* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* Low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/encoder.h>
#include <openssl/buffer.h>
#include <openssl/x509.h>
#include <openssl/rsa.h> /* For i2d_RSAPublicKey */
#include <openssl/dsa.h> /* For i2d_DSAPublicKey */
#include <openssl/ec.h> /* For i2o_ECPublicKey */
#include "crypto/asn1.h"
#include "crypto/evp.h"
static int i2d_provided(const EVP_PKEY *a, int selection,
const char *output_structures[],
unsigned char **pp)
{
OSSL_ENCODER_CTX *ctx = NULL;
int ret;
for (ret = -1;
ret == -1 && *output_structures != NULL;
output_structures++) {
/*
* The i2d_ calls don't take a boundary length for *pp. However,
* OSSL_ENCODER_CTX_get_num_encoders() needs one, so we make one
* up.
*/
size_t len = INT_MAX;
ctx = OSSL_ENCODER_CTX_new_by_EVP_PKEY(a, selection, "DER",
*output_structures, NULL);
if (ctx == NULL)
return -1;
if (OSSL_ENCODER_to_data(ctx, pp, &len))
ret = (int)len;
OSSL_ENCODER_CTX_free(ctx);
ctx = NULL;
}
if (ret == -1)
ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_TYPE);
return ret;
}
int i2d_KeyParams(const EVP_PKEY *a, unsigned char **pp)
{
if (evp_pkey_is_provided(a)) {
const char *output_structures[] = { "type-specific", NULL };
return i2d_provided(a, EVP_PKEY_KEY_PARAMETERS, output_structures, pp);
}
if (a->ameth != NULL && a->ameth->param_encode != NULL)
return a->ameth->param_encode(a, pp);
ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_TYPE);
return -1;
}
int i2d_KeyParams_bio(BIO *bp, const EVP_PKEY *pkey)
{
return ASN1_i2d_bio_of(EVP_PKEY, i2d_KeyParams, bp, pkey);
}
int i2d_PrivateKey(const EVP_PKEY *a, unsigned char **pp)
{
if (evp_pkey_is_provided(a)) {
const char *output_structures[] = { "type-specific", "pkcs8", NULL };
return i2d_provided(a, EVP_PKEY_KEYPAIR, output_structures, pp);
}
if (a->ameth != NULL && a->ameth->old_priv_encode != NULL) {
return a->ameth->old_priv_encode(a, pp);
}
if (a->ameth != NULL && a->ameth->priv_encode != NULL) {
PKCS8_PRIV_KEY_INFO *p8 = EVP_PKEY2PKCS8(a);
int ret = 0;
if (p8 != NULL) {
ret = i2d_PKCS8_PRIV_KEY_INFO(p8, pp);
PKCS8_PRIV_KEY_INFO_free(p8);
}
return ret;
}
ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
return -1;
}
int i2d_PublicKey(const EVP_PKEY *a, unsigned char **pp)
{
if (evp_pkey_is_provided(a)) {
const char *output_structures[] = { "type-specific", NULL };
return i2d_provided(a, EVP_PKEY_PUBLIC_KEY, output_structures, pp);
}
switch (EVP_PKEY_id(a)) {
case EVP_PKEY_RSA:
return i2d_RSAPublicKey(EVP_PKEY_get0_RSA(a), pp);
#ifndef OPENSSL_NO_DSA
case EVP_PKEY_DSA:
return i2d_DSAPublicKey(EVP_PKEY_get0_DSA(a), pp);
#endif
#ifndef OPENSSL_NO_EC
case EVP_PKEY_EC:
return i2o_ECPublicKey(EVP_PKEY_get0_EC_KEY(a), pp);
#endif
default:
ERR_raise(ERR_LIB_ASN1, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
return -1;
}
}
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