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Adapt i2d_PrivateKey for provider only keys

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It uses EVP_PKEY serializers to get the desired results.

One might think that ddoing this might make things a bit dicy for
existing serializers, as they should obviously use i2d functions.
However, since our serializers use much more primitive functions
such as i2d_ASN1_INTEGER(), or keytype specific ones such as
i2d_RSAPrivateKey(), there is no clash.

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/11056)
This commit is contained in:
Richard Levitte 2020-02-11 06:29:08 +01:00
parent 6d9b4d7f4b
commit 3e686afd04
1 changed files with 32 additions and 0 deletions
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32
crypto/asn1/i2d_pr.c
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@ -10,6 +10,8 @@
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/serializer.h>
#include <openssl/buffer.h>
#include <openssl/x509.h>
#include "crypto/asn1.h"
#include "crypto/evp.h"
@ -28,6 +30,36 @@ int i2d_PrivateKey(const EVP_PKEY *a, unsigned char **pp)
}
return ret;
}
if (a->pkeys[0].keymgmt != NULL) {
const char *serprop = OSSL_SERIALIZER_PrivateKey_TO_DER_PQ;
OSSL_SERIALIZER_CTX *ctx =
OSSL_SERIALIZER_CTX_new_by_EVP_PKEY(a, serprop);
BIO *out = BIO_new(BIO_s_mem());
BUF_MEM *buf = NULL;
int ret = -1;
if (ctx != NULL
&& out != NULL
&& OSSL_SERIALIZER_CTX_get_serializer(ctx) != NULL
&& OSSL_SERIALIZER_to_bio(ctx, out)
&& BIO_get_mem_ptr(out, &buf) > 0) {
ret = buf->length;
if (pp != NULL) {
if (*pp == NULL) {
*pp = (unsigned char *)buf->data;
buf->length = 0;
buf->data = NULL;
} else {
memcpy(*pp, buf->data, ret);
*pp += ret;
}
}
}
BIO_free(out);
OSSL_SERIALIZER_CTX_free(ctx);
return ret;
}
ASN1err(ASN1_F_I2D_PRIVATEKEY, ASN1_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
return -1;
}