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p_scossl_decode_mlkem.c
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188 lines (158 loc) · 9.21 KB
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//
// Copyright (c) Microsoft Corporation. Licensed under the MIT license.
//
#include "scossl_provider.h"
#include "p_scossl_decode_common.h"
#include "keymgmt/p_scossl_mlkem_keymgmt.h"
#include <openssl/core_object.h>
#include <openssl/proverr.h>
#ifdef __cplusplus
extern "C" {
#endif
static SCOSSL_MLKEM_KEY_CTX *p_scossl_mlkem_decode_key_bytes(_In_ SCOSSL_DECODE_CTX *ctx, _In_ const ASN1_OBJECT *algorithm,
SYMCRYPT_MLKEM_PARAMS mlkemParams, SYMCRYPT_MLKEMKEY_FORMAT format,
_In_reads_bytes_(cbKey) PCBYTE pbKey, SIZE_T cbKey)
{
SCOSSL_MLKEM_KEY_CTX *keyCtx = NULL;
SCOSSL_STATUS status = SCOSSL_FAILURE;
SCOSSL_MLKEM_GROUP_INFO *groupInfo = NULL;
if (pbKey == NULL || cbKey == 0)
{
ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_KEY);
goto cleanup;
}
if ((groupInfo = p_scossl_mlkem_get_group_info_by_nid(OBJ_obj2nid(algorithm))) == NULL)
{
ERR_raise(ERR_LIB_PROV, PROV_R_NOT_SUPPORTED);
goto cleanup;
}
if (mlkemParams != groupInfo->mlkemParams)
{
goto cleanup;
}
if ((keyCtx = p_scossl_mlkem_keymgmt_new_ctx(ctx->provctx, mlkemParams)) == NULL)
{
ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
goto cleanup;
}
status = p_scossl_mlkem_keymgmt_set_encoded_key(keyCtx, format, pbKey, cbKey);
cleanup:
if (status != SCOSSL_SUCCESS)
{
OPENSSL_free(keyCtx);
keyCtx = NULL;
}
return keyCtx;
}
static SCOSSL_MLKEM_KEY_CTX *p_scossl_PrivateKeyInfo_to_mlkem(_In_ SCOSSL_DECODE_CTX *ctx, SYMCRYPT_MLKEM_PARAMS mlkemParams, _In_ BIO *bio)
{
PKCS8_PRIV_KEY_INFO *p8Info = NULL;
const ASN1_OBJECT *algorithm;
const unsigned char *pbKey;
int cbKey;
ASN1_OCTET_STRING *p8Data = NULL;
SCOSSL_MLKEM_KEY_CTX *keyCtx = NULL;
SYMCRYPT_MLKEMKEY_FORMAT format;
if (d2i_PKCS8_PRIV_KEY_INFO_bio(bio, &p8Info) == NULL ||
!PKCS8_pkey_get0(&algorithm, &pbKey, &cbKey, NULL, p8Info) ||
d2i_ASN1_OCTET_STRING(&p8Data, &pbKey, cbKey) == NULL)
{
ERR_raise(ERR_LIB_PROV, PROV_R_BAD_ENCODING);
goto cleanup;
}
format = cbKey == 64 ? SYMCRYPT_MLKEMKEY_FORMAT_PRIVATE_SEED : SYMCRYPT_MLKEMKEY_FORMAT_DECAPSULATION_KEY;
keyCtx = p_scossl_mlkem_decode_key_bytes(ctx, algorithm,
mlkemParams, format,
ASN1_STRING_get0_data(p8Data), ASN1_STRING_length(p8Data));
cleanup:
ASN1_OCTET_STRING_free(p8Data);
PKCS8_PRIV_KEY_INFO_free(p8Info);
return keyCtx;
}
static SCOSSL_MLKEM_KEY_CTX *p_scossl_SubjectPublicKeyInfo_to_mlkem(_In_ SCOSSL_DECODE_CTX *ctx, SYMCRYPT_MLKEM_PARAMS mlkemParams, _In_ BIO *bio)
{
OSSL_LIB_CTX *libCtx = ctx->provctx == NULL ? NULL : ctx->provctx->libctx;
SUBJECT_PUBKEY_INFO *subjPubKeyInfo = NULL;
const ASN1_OBJECT *algorithm;
SCOSSL_MLKEM_KEY_CTX *keyCtx = NULL;
if ((subjPubKeyInfo = OPENSSL_zalloc(sizeof(SUBJECT_PUBKEY_INFO))) == NULL)
{
ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
goto cleanup;
}
if (ASN1_item_d2i_bio_ex(p_scossl_decode_subject_pubkey_asn1_item(), bio, (ASN1_VALUE **)&subjPubKeyInfo, libCtx, NULL) == NULL)
{
ERR_raise(ERR_LIB_PROV, PROV_R_BAD_ENCODING);
goto cleanup;
}
X509_ALGOR_get0(&algorithm, NULL, NULL, subjPubKeyInfo->x509Alg);
keyCtx = p_scossl_mlkem_decode_key_bytes(ctx, algorithm,
mlkemParams, SYMCRYPT_MLKEMKEY_FORMAT_ENCAPSULATION_KEY,
ASN1_STRING_get0_data(subjPubKeyInfo->subjectPublicKey), ASN1_STRING_length(subjPubKeyInfo->subjectPublicKey));
cleanup:
OPENSSL_free(subjPubKeyInfo);
return keyCtx;
}
static SCOSSL_STATUS p_scossl_der_to_mlkem_export_object(_In_ SCOSSL_DECODE_CTX *ctx,
_In_reads_bytes_(cbObjRef) const void *pbObjRef, _In_ size_t cbObjRef,
_In_ OSSL_CALLBACK *exportCb, _In_ void *exportCbArg)
{
SCOSSL_MLKEM_KEY_CTX *keyCtx = *(SCOSSL_MLKEM_KEY_CTX **)pbObjRef;
if (cbObjRef != sizeof(SCOSSL_MLKEM_KEY_CTX *) || keyCtx == NULL)
{
ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
return SCOSSL_FAILURE;
}
return p_scossl_mlkem_keymgmt_export(keyCtx, ctx->desc->selection, exportCb, exportCbArg);
}
#define SCOSSL_MAKE_MLKEM_DECODER(decoderType, bits) \
static SCOSSL_MLKEM_KEY_CTX \
*p_scossl_##decoderType##_to_mlkem##bits(_In_ SCOSSL_DECODE_CTX *ctx, \
_In_ BIO *bio) \
{ \
return p_scossl_##decoderType##_to_mlkem(ctx, SYMCRYPT_MLKEM_PARAMS_MLKEM##bits, bio); \
} \
\
static const SCOSSL_DECODE_KEYTYPE_DESC p_scossl_mlkem##bits##_##decoderType##_desc = { \
"ML-KEM-"#bits, \
select_##decoderType, \
(PSCOSSL_DECODE_INTERNAL_FN)p_scossl_##decoderType##_to_mlkem##bits, \
(OSSL_FUNC_keymgmt_free_fn *)p_scossl_mlkem_keymgmt_free_key_ctx}; \
\
static SCOSSL_DECODE_CTX * \
p_scossl_der_to_mlkem##bits##_##decoderType##_newctx(_In_ SCOSSL_PROVCTX *provctx) \
{ \
return p_scossl_decode_newctx( \
provctx, \
&p_scossl_mlkem##bits##_##decoderType##_desc); \
} \
\
static BOOL \
p_scossl_der_to_mlkem##bits##_##decoderType##_does_selection( \
ossl_unused void *provctx, \
int selection) \
{ \
return p_scossl_decode_does_selection( \
&p_scossl_mlkem##bits##_##decoderType##_desc, \
selection); \
} \
\
const OSSL_DISPATCH p_scossl_der_to_mlkem##bits##_##decoderType##_functions[] = { \
{OSSL_FUNC_DECODER_NEWCTX, (void (*)(void))p_scossl_der_to_mlkem##bits##_##decoderType##_newctx}, \
{OSSL_FUNC_DECODER_FREECTX, (void (*)(void))p_scossl_decode_freectx}, \
{OSSL_FUNC_DECODER_SET_CTX_PARAMS, (void (*)(void))p_scossl_decode_set_ctx_params}, \
{OSSL_FUNC_DECODER_SETTABLE_CTX_PARAMS, (void (*)(void))p_scossl_decode_settable_ctx_params}, \
{OSSL_FUNC_DECODER_DOES_SELECTION, (void (*)(void)) \
p_scossl_der_to_mlkem##bits##_##decoderType##_does_selection}, \
{OSSL_FUNC_DECODER_DECODE, (void (*)(void))p_scossl_decode}, \
{OSSL_FUNC_DECODER_EXPORT_OBJECT, (void (*)(void))p_scossl_der_to_mlkem_export_object}, \
{0, NULL}};
SCOSSL_MAKE_MLKEM_DECODER(PrivateKeyInfo, 512);
SCOSSL_MAKE_MLKEM_DECODER(SubjectPublicKeyInfo, 512);
SCOSSL_MAKE_MLKEM_DECODER(PrivateKeyInfo, 768);
SCOSSL_MAKE_MLKEM_DECODER(SubjectPublicKeyInfo, 768);
SCOSSL_MAKE_MLKEM_DECODER(PrivateKeyInfo, 1024);
SCOSSL_MAKE_MLKEM_DECODER(SubjectPublicKeyInfo, 1024);
#ifdef __cplusplus
}
#endif