/src/openssl/providers/implementations/encode_decode/decode_pvk2key.c

Source (jump to first uncovered line)
/*
 * Copyright 2020-2023 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/err.h>
#include <openssl/pem.h>         /* For public PVK functions */
#include <openssl/x509.h>
#include "internal/passphrase.h"
#include "internal/sizes.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,
                                   OSSL_LIB_CTX *libctx, const char *propq);
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_decode_fn pvk2key_decode;
static OSSL_FUNC_decoder_export_object_fn pvk2key_export_object;
static OSSL_FUNC_decoder_settable_ctx_params_fn pvk2key_settable_ctx_params;
static OSSL_FUNC_decoder_set_ctx_params_fn pvk2key_set_ctx_params;

/*
 * Context used for DER to key decoding.
 */
struct pvk2key_ctx_st {
    PROV_CTX *provctx;
    char propq[OSSL_MAX_PROPQUERY_SIZE];
    const struct keytype_desc_st *desc;
    /* The selection that is passed to der2key_decode() */
    int selection;
};

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_settable_ctx_params(ossl_unused void *provctx)
{
    static const OSSL_PARAM settables[] = {
        OSSL_PARAM_utf8_string(OSSL_DECODER_PARAM_PROPERTIES, NULL, 0),
        OSSL_PARAM_END,
    };
    return settables;
}

static int pvk2key_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
    struct pvk2key_ctx_st *ctx = vctx;
    const OSSL_PARAM *p;
    char *str = ctx->propq;

    p = OSSL_PARAM_locate_const(params, OSSL_DECODER_PARAM_PROPERTIES);
    if (p != NULL && !OSSL_PARAM_get_utf8_string(p, &str, sizeof(ctx->propq)))
        return 0;

    return 1;
}

static int pvk2key_does_selection(void *provctx, int selection)
{
    if (selection == 0)
        return 1;

    if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY)  != 0)
        return 1;

    return 0;
}

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 (in == NULL)
        return 0;

    ctx->selection = selection;

    if ((selection == 0
         || (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
        && ctx->desc->read_private_key != NULL) {
        struct ossl_passphrase_data_st pwdata;
        int err, lib, reason;

        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_pvk_password, &pwdata,
                                          PROV_LIBCTX_OF(ctx->provctx),
                                          ctx->propq);

        /*
         * Because the PVK API doesn't have a separate decrypt call, we need
         * to check the error queue for certain well known errors that are
         * considered fatal and which we pass through, while the rest gets
         * thrown away.
         */
        err = ERR_peek_last_error();
        lib = ERR_GET_LIB(err);
        reason = ERR_GET_REASON(err);
        if (lib == ERR_LIB_PEM
            && (reason == PEM_R_BAD_PASSWORD_READ
                || reason == PEM_R_BAD_DECRYPT)) {
            ERR_clear_last_mark();
            goto end;
        }

        if (selection != 0 && key == NULL)
            goto next;
    }

    if (key != NULL && ctx->desc->adjust_key != NULL)
        ctx->desc->adjust_key(key, ctx);

 next:
    /*
     * Indicated that we successfully decoded something, or not at all.
     * Ending up "empty handed" is not an error.
     */
    ok = 1;

    /*
     * 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) {
        int selection = ctx->selection;

        if (selection == 0)
            selection = OSSL_KEYMGMT_SELECT_ALL;
        /* The contents of the reference is the address to our object */
        keydata = *(void **)reference;

        return export(keydata, selection, export_cb, export_cbarg);
    }
    return 0;
}

/* ---------------------------------------------------------------------- */

#define dsa_private_key_bio     (b2i_PVK_of_bio_pw_fn *)b2i_DSA_PVK_bio_ex
#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_ex

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_DOES_SELECTION,                             \
          (void (*)(void))pvk2key_does_selection },                     \
        { OSSL_FUNC_DECODER_DECODE,                                     \
          (void (*)(void))pvk2key_decode },                             \
        { OSSL_FUNC_DECODER_EXPORT_OBJECT,                              \
          (void (*)(void))pvk2key_export_object },                      \
        { OSSL_FUNC_DECODER_SETTABLE_CTX_PARAMS,                        \
          (void (*)(void))pvk2key_settable_ctx_params },                \
        { OSSL_FUNC_DECODER_SET_CTX_PARAMS,                             \
          (void (*)(void))pvk2key_set_ctx_params },                     \
        OSSL_DISPATCH_END                                               \
    }

#ifndef OPENSSL_NO_DSA
IMPLEMENT_MS(DSA, dsa);
#endif
IMPLEMENT_MS(RSA, rsa);

Coverage Report

Created: 2024-11-21 07:03

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2020-2023 The OpenSSL Project Authors. All Rights Reserved.
3		*
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
8		*/
9
10		/*
11		* low level APIs are deprecated for public use, but still ok for
12		* internal use.
13		*/
14		#include "internal/deprecated.h"
15
16		#include <string.h>
17
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 "internal/sizes.h"
28		#include "crypto/pem.h" /* For internal PVK and "blob" headers */
29		#include "crypto/rsa.h"
30		#include "prov/bio.h"
31		#include "prov/implementations.h"
32		#include "endecoder_local.h"
33
34		struct pvk2key_ctx_st; /* Forward declaration */
35		typedef int check_key_fn(void , struct pvk2key_ctx_st ctx);
36		typedef void adjust_key_fn(void , struct pvk2key_ctx_st ctx);
37		typedef void b2i_PVK_of_bio_pw_fn(BIO in, pem_password_cb cb, void u,
38		OSSL_LIB_CTX libctx, const char propq);
39		typedef void free_key_fn(void *);
40		struct keytype_desc_st {
41		int type; /* EVP key type */
42		const char name; / Keytype */
43		const OSSL_DISPATCH fns; / Keymgmt (to pilfer functions from) */
44
45		b2i_PVK_of_bio_pw_fn *read_private_key;
46		adjust_key_fn *adjust_key;
47		free_key_fn *free_key;
48		};
49
50		static OSSL_FUNC_decoder_freectx_fn pvk2key_freectx;
51		static OSSL_FUNC_decoder_decode_fn pvk2key_decode;
52		static OSSL_FUNC_decoder_export_object_fn pvk2key_export_object;
53		static OSSL_FUNC_decoder_settable_ctx_params_fn pvk2key_settable_ctx_params;
54		static OSSL_FUNC_decoder_set_ctx_params_fn pvk2key_set_ctx_params;
55
56		/*
57		* Context used for DER to key decoding.
58		*/
59		struct pvk2key_ctx_st {
60		PROV_CTX *provctx;
61		char propq[OSSL_MAX_PROPQUERY_SIZE];
62		const struct keytype_desc_st *desc;
63		/* The selection that is passed to der2key_decode() */
64		int selection;
65		};
66
67		static struct pvk2key_ctx_st *
68		pvk2key_newctx(void provctx, const struct keytype_desc_st desc)
69	0	{
70	0	struct pvk2key_ctx_st ctx = OPENSSL_zalloc(sizeof(ctx));
71
72	0	if (ctx != NULL) {
73	0	ctx->provctx = provctx;
74	0	ctx->desc = desc;
75	0	}
76	0	return ctx;
77	0	}
78
79		static void pvk2key_freectx(void *vctx)
80	0	{
81	0	struct pvk2key_ctx_st *ctx = vctx;
82
83	0	OPENSSL_free(ctx);
84	0	}
85
86		static const OSSL_PARAM pvk2key_settable_ctx_params(ossl_unused void provctx)
87	0	{
88	0	static const OSSL_PARAM settables[] = {
89	0	OSSL_PARAM_utf8_string(OSSL_DECODER_PARAM_PROPERTIES, NULL, 0),
90	0	OSSL_PARAM_END,
91	0	};
92	0	return settables;
93	0	}
94
95		static int pvk2key_set_ctx_params(void *vctx, const OSSL_PARAM params[])
96	0	{
97	0	struct pvk2key_ctx_st *ctx = vctx;
98	0	const OSSL_PARAM *p;
99	0	char *str = ctx->propq;
100
101	0	p = OSSL_PARAM_locate_const(params, OSSL_DECODER_PARAM_PROPERTIES);
102	0	if (p != NULL && !OSSL_PARAM_get_utf8_string(p, &str, sizeof(ctx->propq)))
103	0	return 0;
104
105	0	return 1;
106	0	}
107
108		static int pvk2key_does_selection(void *provctx, int selection)
109	0	{
110	0	if (selection == 0)
111	0	return 1;
112
113	0	if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
114	0	return 1;
115
116	0	return 0;
117	0	}
118
119		static int pvk2key_decode(void vctx, OSSL_CORE_BIO cin, int selection,
120		OSSL_CALLBACK data_cb, void data_cbarg,
121		OSSL_PASSPHRASE_CALLBACK pw_cb, void pw_cbarg)
122	0	{
123	0	struct pvk2key_ctx_st *ctx = vctx;
124	0	BIO *in = ossl_bio_new_from_core_bio(ctx->provctx, cin);
125	0	void *key = NULL;
126	0	int ok = 0;
127
128	0	if (in == NULL)
129	0	return 0;
130
131	0	ctx->selection = selection;
132
133	0	if ((selection == 0
134	0	\|\| (selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
135	0	&& ctx->desc->read_private_key != NULL) {
136	0	struct ossl_passphrase_data_st pwdata;
137	0	int err, lib, reason;
138
139	0	memset(&pwdata, 0, sizeof(pwdata));
140	0	if (!ossl_pw_set_ossl_passphrase_cb(&pwdata, pw_cb, pw_cbarg))
141	0	goto end;
142
143	0	key = ctx->desc->read_private_key(in, ossl_pw_pvk_password, &pwdata,
144	0	PROV_LIBCTX_OF(ctx->provctx),
145	0	ctx->propq);
146
147		/*
148		* Because the PVK API doesn't have a separate decrypt call, we need
149		* to check the error queue for certain well known errors that are
150		* considered fatal and which we pass through, while the rest gets
151		* thrown away.
152		*/
153	0	err = ERR_peek_last_error();
154	0	lib = ERR_GET_LIB(err);
155	0	reason = ERR_GET_REASON(err);
156	0	if (lib == ERR_LIB_PEM
157	0	&& (reason == PEM_R_BAD_PASSWORD_READ
158	0	\|\| reason == PEM_R_BAD_DECRYPT)) {
159	0	ERR_clear_last_mark();
160	0	goto end;
161	0	}
162
163	0	if (selection != 0 && key == NULL)
164	0	goto next;
165	0	}
166
167	0	if (key != NULL && ctx->desc->adjust_key != NULL)
168	0	ctx->desc->adjust_key(key, ctx);
169
170	0	next:
171		/*
172		* Indicated that we successfully decoded something, or not at all.
173		* Ending up "empty handed" is not an error.
174		*/
175	0	ok = 1;
176
177		/*
178		* We free resources here so it's not held up during the callback, because
179		* we know the process is recursive and the allocated chunks of memory
180		* add up.
181		*/
182	0	BIO_free(in);
183	0	in = NULL;
184
185	0	if (key != NULL) {
186	0	OSSL_PARAM params[4];
187	0	int object_type = OSSL_OBJECT_PKEY;
188
189	0	params[0] =
190	0	OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type);
191	0	params[1] =
192	0	OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE,
193	0	(char *)ctx->desc->name, 0);
194		/* The address of the key becomes the octet string */
195	0	params[2] =
196	0	OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE,
197	0	&key, sizeof(key));
198	0	params[3] = OSSL_PARAM_construct_end();
199
200	0	ok = data_cb(params, data_cbarg);
201	0	}
202
203	0	end:
204	0	BIO_free(in);
205	0	ctx->desc->free_key(key);
206
207	0	return ok;
208	0	}
209
210		static int pvk2key_export_object(void *vctx,
211		const void *reference, size_t reference_sz,
212		OSSL_CALLBACK export_cb, void export_cbarg)
213	0	{
214	0	struct pvk2key_ctx_st *ctx = vctx;
215	0	OSSL_FUNC_keymgmt_export_fn *export =
216	0	ossl_prov_get_keymgmt_export(ctx->desc->fns);
217	0	void *keydata;
218
219	0	if (reference_sz == sizeof(keydata) && export != NULL) {
220	0	int selection = ctx->selection;
221
222	0	if (selection == 0)
223	0	selection = OSSL_KEYMGMT_SELECT_ALL;
224		/* The contents of the reference is the address to our object */
225	0	keydata = (void *)reference;
226
227	0	return export(keydata, selection, export_cb, export_cbarg);
228	0	}
229	0	return 0;
230	0	}
231
232		/* ---------------------------------------------------------------------- */
233
234		#define dsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_DSA_PVK_bio_ex
235		#define dsa_adjust NULL
236		#define dsa_free (void ()(void ))DSA_free
237
238		/* ---------------------------------------------------------------------- */
239
240		#define rsa_private_key_bio (b2i_PVK_of_bio_pw_fn *)b2i_RSA_PVK_bio_ex
241
242		static void rsa_adjust(void key, struct pvk2key_ctx_st ctx)
243	0	{
244	0	ossl_rsa_set0_libctx(key, PROV_LIBCTX_OF(ctx->provctx));
245	0	}
246
247		#define rsa_free (void ()(void ))RSA_free
248
249		/* ---------------------------------------------------------------------- */
250
251		#define IMPLEMENT_MS(KEYTYPE, keytype) \
252		static const struct keytype_desc_st \
253		pvk2##keytype##_desc = { \
254		EVP_PKEY_##KEYTYPE, #KEYTYPE, \
255		ossl_##keytype##_keymgmt_functions, \
256		keytype##_private_key_bio, \
257		keytype##_adjust, \
258		keytype##_free \
259		}; \
260		static OSSL_FUNC_decoder_newctx_fn pvk2##keytype##_newctx; \
261		static void pvk2##keytype##_newctx(void provctx) \
262	0	{ \
263	0	return pvk2key_newctx(provctx, &pvk2##keytype##_desc); \
264	0	} \ Unexecuted instantiation: decode_pvk2key.c:pvk2dsa_newctx Unexecuted instantiation: decode_pvk2key.c:pvk2rsa_newctx
265		const OSSL_DISPATCH \
266		ossl_##pvk_to_##keytype##_decoder_functions[] = { \
267		{ OSSL_FUNC_DECODER_NEWCTX, \
268		(void (*)(void))pvk2##keytype##_newctx }, \
269		{ OSSL_FUNC_DECODER_FREECTX, \
270		(void (*)(void))pvk2key_freectx }, \
271		{ OSSL_FUNC_DECODER_DOES_SELECTION, \
272		(void (*)(void))pvk2key_does_selection }, \
273		{ OSSL_FUNC_DECODER_DECODE, \
274		(void (*)(void))pvk2key_decode }, \
275		{ OSSL_FUNC_DECODER_EXPORT_OBJECT, \
276		(void (*)(void))pvk2key_export_object }, \
277		{ OSSL_FUNC_DECODER_SETTABLE_CTX_PARAMS, \
278		(void (*)(void))pvk2key_settable_ctx_params }, \
279		{ OSSL_FUNC_DECODER_SET_CTX_PARAMS, \
280		(void (*)(void))pvk2key_set_ctx_params }, \
281		OSSL_DISPATCH_END \
282		}
283
284		#ifndef OPENSSL_NO_DSA
285		IMPLEMENT_MS(DSA, dsa);
286		#endif
287		IMPLEMENT_MS(RSA, rsa);