2 * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
18 #include <openssl/core_dispatch.h>
19 #include <openssl/core_names.h>
20 #include <openssl/core_object.h>
21 #include <openssl/crypto.h>
22 #include <openssl/params.h>
23 #include <openssl/err.h>
24 #include <openssl/pem.h> /* For public PVK functions */
25 #include <openssl/x509.h>
26 #include "internal/passphrase.h"
27 #include "crypto/pem.h" /* For internal PVK and "blob" headers */
28 #include "crypto/rsa.h"
30 #include "prov/implementations.h"
31 #include "endecoder_local.h"
33 struct pvk2key_ctx_st; /* Forward declaration */
34 typedef int check_key_fn(void *, struct pvk2key_ctx_st *ctx);
35 typedef void adjust_key_fn(void *, struct pvk2key_ctx_st *ctx);
36 typedef void *b2i_PVK_of_bio_pw_fn(BIO *in, pem_password_cb *cb, void *u);
37 typedef void free_key_fn(void *);
38 struct keytype_desc_st {
39 int type; /* EVP key type */
40 const char *name; /* Keytype */
41 const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */
43 b2i_PVK_of_bio_pw_fn *read_private_key;
44 adjust_key_fn *adjust_key;
45 free_key_fn *free_key;
48 static OSSL_FUNC_decoder_freectx_fn pvk2key_freectx;
49 static OSSL_FUNC_decoder_gettable_params_fn pvk2key_gettable_params;
50 static OSSL_FUNC_decoder_get_params_fn pvk2key_get_params;
51 static OSSL_FUNC_decoder_decode_fn pvk2key_decode;
52 static OSSL_FUNC_decoder_export_object_fn pvk2key_export_object;
55 * Context used for DER to key decoding.
57 struct pvk2key_ctx_st {
59 const struct keytype_desc_st *desc;
62 static struct pvk2key_ctx_st *
63 pvk2key_newctx(void *provctx, const struct keytype_desc_st *desc)
65 struct pvk2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
68 ctx->provctx = provctx;
74 static void pvk2key_freectx(void *vctx)
76 struct pvk2key_ctx_st *ctx = vctx;
81 static const OSSL_PARAM *pvk2key_gettable_params(ossl_unused void *provctx)
83 static const OSSL_PARAM gettables[] = {
84 { OSSL_DECODER_PARAM_INPUT_TYPE, OSSL_PARAM_UTF8_PTR, NULL, 0, 0 },
91 static int pvk2key_get_params(OSSL_PARAM params[])
95 p = OSSL_PARAM_locate(params, OSSL_DECODER_PARAM_INPUT_TYPE);
96 if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "PVK"))
102 static int pvk2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection,
103 OSSL_CALLBACK *data_cb, void *data_cbarg,
104 OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
106 struct pvk2key_ctx_st *ctx = vctx;
107 BIO *in = ossl_bio_new_from_core_bio(ctx->provctx, cin);
112 || (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
113 && ctx->desc->read_private_key != NULL) {
114 struct ossl_passphrase_data_st pwdata;
115 int err, lib, reason;
117 memset(&pwdata, 0, sizeof(pwdata));
118 if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg))
121 key = ctx->desc->read_private_key(in, ossl_pw_pem_password, &pwdata);
124 * Because the PVK API doesn't have a separate decrypt call, we need
125 * to check the error queue for certain well known errors that are
126 * considered fatal and which we pass through, while the rest gets
129 err = ERR_peek_last_error();
130 lib = ERR_GET_LIB(err);
131 reason = ERR_GET_REASON(err);
132 if (lib == ERR_LIB_PEM
133 && (reason == PEM_R_BAD_PASSWORD_READ
134 || reason == PEM_R_BAD_DECRYPT)) {
135 ERR_clear_last_mark();
139 if (selection != 0 && key == NULL)
143 if (key != NULL && ctx->desc->adjust_key != NULL)
144 ctx->desc->adjust_key(key, ctx);
148 * Indicated that we successfully decoded something, or not at all.
149 * Ending up "empty handed" is not an error.
154 * We free resources here so it's not held up during the callback, because
155 * we know the process is recursive and the allocated chunks of memory
162 OSSL_PARAM params[4];
163 int object_type = OSSL_OBJECT_PKEY;
166 OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type);
168 OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE,
169 (char *)ctx->desc->name, 0);
170 /* The address of the key becomes the octet string */
172 OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE,
174 params[3] = OSSL_PARAM_construct_end();
176 ok = data_cb(params, data_cbarg);
181 ctx->desc->free_key(key);
186 static int pvk2key_export_object(void *vctx,
187 const void *reference, size_t reference_sz,
188 OSSL_CALLBACK *export_cb, void *export_cbarg)
190 struct pvk2key_ctx_st *ctx = vctx;
191 OSSL_FUNC_keymgmt_export_fn *export =
192 ossl_prov_get_keymgmt_export(ctx->desc->fns);
195 if (reference_sz == sizeof(keydata) && export != NULL) {
196 /* The contents of the reference is the address to our object */
197 keydata = *(void **)reference;
199 return export(keydata, OSSL_KEYMGMT_SELECT_ALL,
200 export_cb, export_cbarg);
205 /* ---------------------------------------------------------------------- */
207 #define dsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_DSA_PVK_bio
208 #define dsa_adjust NULL
209 #define dsa_free (void (*)(void *))DSA_free
211 /* ---------------------------------------------------------------------- */
213 #define rsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_RSA_PVK_bio
215 static void rsa_adjust(void *key, struct pvk2key_ctx_st *ctx)
217 ossl_rsa_set0_libctx(key, PROV_LIBCTX_OF(ctx->provctx));
220 #define rsa_free (void (*)(void *))RSA_free
222 /* ---------------------------------------------------------------------- */
224 #define IMPLEMENT_MS(KEYTYPE, keytype) \
225 static const struct keytype_desc_st \
226 pvk2##keytype##_desc = { \
227 EVP_PKEY_##KEYTYPE, #KEYTYPE, \
228 ossl_##keytype##_keymgmt_functions, \
229 keytype##_private_key_bio, \
233 static OSSL_FUNC_decoder_newctx_fn pvk2##keytype##_newctx; \
234 static void *pvk2##keytype##_newctx(void *provctx) \
236 return pvk2key_newctx(provctx, &pvk2##keytype##_desc); \
238 const OSSL_DISPATCH \
239 ossl_##pvk_to_##keytype##_decoder_functions[] = { \
240 { OSSL_FUNC_DECODER_NEWCTX, \
241 (void (*)(void))pvk2##keytype##_newctx }, \
242 { OSSL_FUNC_DECODER_FREECTX, \
243 (void (*)(void))pvk2key_freectx }, \
244 { OSSL_FUNC_DECODER_GETTABLE_PARAMS, \
245 (void (*)(void))pvk2key_gettable_params }, \
246 { OSSL_FUNC_DECODER_GET_PARAMS, \
247 (void (*)(void))pvk2key_get_params }, \
248 { OSSL_FUNC_DECODER_DECODE, \
249 (void (*)(void))pvk2key_decode }, \
250 { OSSL_FUNC_DECODER_EXPORT_OBJECT, \
251 (void (*)(void))pvk2key_export_object }, \
255 #ifndef OPENSSL_NO_DSA
256 IMPLEMENT_MS(DSA, dsa);
258 IMPLEMENT_MS(RSA, rsa);