diff options
Diffstat (limited to 'providers/implementations/encode_decode/decode_pvk2key.c')
| -rw-r--r-- | providers/implementations/encode_decode/decode_pvk2key.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/providers/implementations/encode_decode/decode_pvk2key.c b/providers/implementations/encode_decode/decode_pvk2key.c new file mode 100644 index 0000000000..3f2c80abdc --- /dev/null +++ b/providers/implementations/encode_decode/decode_pvk2key.c @@ -0,0 +1,232 @@ +/* + * Copyright 2020-2021 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 <string.h> + +#include <openssl/core_dispatch.h> +#include <openssl/core_names.h> +#include <openssl/core_object.h> +#include <openssl/crypto.h> +#include <openssl/params.h> +#include <openssl/pem.h> /* For public PVK functions */ +#include <openssl/x509.h> +#include "internal/passphrase.h" +#include "crypto/pem.h" /* For internal PVK and "blob" headers */ +#include "crypto/rsa.h" +#include "prov/bio.h" +#include "prov/implementations.h" +#include "endecoder_local.h" + +struct pvk2key_ctx_st; /* Forward declaration */ +typedef int check_key_fn(void *, struct pvk2key_ctx_st *ctx); +typedef void adjust_key_fn(void *, struct pvk2key_ctx_st *ctx); +typedef void *b2i_PVK_of_bio_pw_fn(BIO *in, pem_password_cb *cb, void *u); +typedef void free_key_fn(void *); +struct keytype_desc_st { + int type; /* EVP key type */ + const char *name; /* Keytype */ + const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */ + + b2i_PVK_of_bio_pw_fn *read_private_key; + adjust_key_fn *adjust_key; + free_key_fn *free_key; +}; + +static OSSL_FUNC_decoder_freectx_fn pvk2key_freectx; +static OSSL_FUNC_decoder_gettable_params_fn pvk2key_gettable_params; +static OSSL_FUNC_decoder_get_params_fn pvk2key_get_params; +static OSSL_FUNC_decoder_decode_fn pvk2key_decode; +static OSSL_FUNC_decoder_export_object_fn pvk2key_export_object; + +/* + * Context used for DER to key decoding. + */ +struct pvk2key_ctx_st { + PROV_CTX *provctx; + const struct keytype_desc_st *desc; +}; + +static struct pvk2key_ctx_st * +pvk2key_newctx(void *provctx, const struct keytype_desc_st *desc) +{ + struct pvk2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx)); + + if (ctx != NULL) { + ctx->provctx = provctx; + ctx->desc = desc; + } + return ctx; +} + +static void pvk2key_freectx(void *vctx) +{ + struct pvk2key_ctx_st *ctx = vctx; + + OPENSSL_free(ctx); +} + +static const OSSL_PARAM *pvk2key_gettable_params(ossl_unused void *provctx) +{ + static const OSSL_PARAM gettables[] = { + { OSSL_DECODER_PARAM_INPUT_TYPE, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 }, + OSSL_PARAM_END, + }; + + return gettables; +} + +static int pvk2key_get_params(OSSL_PARAM params[]) +{ + OSSL_PARAM *p; + + p = OSSL_PARAM_locate(params, OSSL_DECODER_PARAM_INPUT_TYPE); + if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "PVK")) + return 0; + + return 1; +} + +static int pvk2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection, + OSSL_CALLBACK *data_cb, void *data_cbarg, + OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg) +{ + struct pvk2key_ctx_st *ctx = vctx; + BIO *in = ossl_bio_new_from_core_bio(ctx->provctx, cin); + void *key = NULL; + int ok = 0; + + if ((selection == 0 + || (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) + && ctx->desc->read_private_key != NULL) { + struct ossl_passphrase_data_st pwdata; + + memset(&pwdata, 0, sizeof(pwdata)); + if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg)) + goto end; + key = ctx->desc->read_private_key(in, ossl_pw_pem_password, &pwdata); + if (selection != 0 && key == NULL) + goto next; + } + + if (key != NULL && ctx->desc->adjust_key != NULL) + ctx->desc->adjust_key(key, ctx); + + next: + /* + * We free resources here so it's not held up during the callback, because + * we know the process is recursive and the allocated chunks of memory + * add up. + */ + BIO_free(in); + in = NULL; + + if (key != NULL) { + OSSL_PARAM params[4]; + int object_type = OSSL_OBJECT_PKEY; + + params[0] = + OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type); + params[1] = + OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE, + (char *)ctx->desc->name, 0); + /* The address of the key becomes the octet string */ + params[2] = + OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE, + &key, sizeof(key)); + params[3] = OSSL_PARAM_construct_end(); + + ok = data_cb(params, data_cbarg); + } + + end: + BIO_free(in); + ctx->desc->free_key(key); + + return ok; +} + +static int pvk2key_export_object(void *vctx, + const void *reference, size_t reference_sz, + OSSL_CALLBACK *export_cb, void *export_cbarg) +{ + struct pvk2key_ctx_st *ctx = vctx; + OSSL_FUNC_keymgmt_export_fn *export = + ossl_prov_get_keymgmt_export(ctx->desc->fns); + void *keydata; + + if (reference_sz == sizeof(keydata) && export != NULL) { + /* The contents of the reference is the address to our object */ + keydata = *(void **)reference; + + return export(keydata, OSSL_KEYMGMT_SELECT_ALL, + export_cb, export_cbarg); + } + return 0; +} + +/* ---------------------------------------------------------------------- */ + +#define dsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_DSA_PVK_bio +#define dsa_adjust NULL +#define dsa_free (void (*)(void *))DSA_free + +/* ---------------------------------------------------------------------- */ + +#define rsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_RSA_PVK_bio + +static void rsa_adjust(void *key, struct pvk2key_ctx_st *ctx) +{ + ossl_rsa_set0_libctx(key, PROV_LIBCTX_OF(ctx->provctx)); +} + +#define rsa_free (void (*)(void *))RSA_free + +/* ---------------------------------------------------------------------- */ + +#define IMPLEMENT_MS(KEYTYPE, keytype) \ + static const struct keytype_desc_st \ + pvk2##keytype##_desc = { \ + EVP_PKEY_##KEYTYPE, #KEYTYPE, \ + ossl_##keytype##_keymgmt_functions, \ + keytype##_private_key_bio, \ + keytype##_adjust, \ + keytype##_free \ + }; \ + static OSSL_FUNC_decoder_newctx_fn pvk2##keytype##_newctx; \ + static void *pvk2##keytype##_newctx(void *provctx) \ + { \ + return pvk2key_newctx(provctx, &pvk2##keytype##_desc); \ + } \ + const OSSL_DISPATCH \ + ossl_##pvk_to_##keytype##_decoder_functions[] = { \ + { OSSL_FUNC_DECODER_NEWCTX, \ + (void (*)(void))pvk2##keytype##_newctx }, \ + { OSSL_FUNC_DECODER_FREECTX, \ + (void (*)(void))pvk2key_freectx }, \ + { OSSL_FUNC_DECODER_GETTABLE_PARAMS, \ + (void (*)(void))pvk2key_gettable_params }, \ + { OSSL_FUNC_DECODER_GET_PARAMS, \ + (void (*)(void))pvk2key_get_params }, \ + { OSSL_FUNC_DECODER_DECODE, \ + (void (*)(void))pvk2key_decode }, \ + { OSSL_FUNC_DECODER_EXPORT_OBJECT, \ + (void (*)(void))pvk2key_export_object }, \ + { 0, NULL } \ + } + +#ifndef OPENSSL_NO_DSA +IMPLEMENT_MS(DSA, dsa); +#endif +IMPLEMENT_MS(RSA, rsa); |