/src/openssl32/providers/implementations/ciphers/cipher_tdes_wrap.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2023 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
 */

/*
 * DES and SHA-1 low level APIs are deprecated for public use, but still ok for
 * internal use.
 */
#include "internal/deprecated.h"

#include <openssl/sha.h>
#include <openssl/rand.h>
#include <openssl/proverr.h>
#include "cipher_tdes_default.h"
#include "crypto/evp.h"
#include "crypto/sha.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"

#define TDES_WRAP_FLAGS PROV_CIPHER_FLAG_CUSTOM_IV | PROV_CIPHER_FLAG_RAND_KEY

static OSSL_FUNC_cipher_update_fn tdes_wrap_update;
static OSSL_FUNC_cipher_cipher_fn tdes_wrap_cipher;

static const unsigned char wrap_iv[8] =
{
    0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05
};

static int des_ede3_unwrap(PROV_CIPHER_CTX *ctx, unsigned char *out,
                           const unsigned char *in, size_t inl)
{
    unsigned char icv[8], iv[TDES_IVLEN], sha1tmp[SHA_DIGEST_LENGTH];
    int rv = -1;

    if (inl < 24)
        return -1;
    if (out == NULL)
        return inl - 16;

    memcpy(ctx->iv, wrap_iv, 8);
    /* Decrypt first block which will end up as icv */
    ctx->hw->cipher(ctx, icv, in, 8);
    /* Decrypt central blocks */
    /*
     * If decrypting in place move whole output along a block so the next
     * des_ede_cbc_cipher is in place.
     */
    if (out == in) {
        memmove(out, out + 8, inl - 8);
        in -= 8;
    }
    ctx->hw->cipher(ctx, out, in + 8, inl - 16);
    /* Decrypt final block which will be IV */
    ctx->hw->cipher(ctx, iv, in + inl - 8, 8);
    /* Reverse order of everything */
    BUF_reverse(icv, NULL, 8);
    BUF_reverse(out, NULL, inl - 16);
    BUF_reverse(ctx->iv, iv, 8);
    /* Decrypt again using new IV */
    ctx->hw->cipher(ctx, out, out, inl - 16);
    ctx->hw->cipher(ctx, icv, icv, 8);
    if (ossl_sha1(out, inl - 16, sha1tmp) /* Work out hash of first portion */
            && CRYPTO_memcmp(sha1tmp, icv, 8) == 0)
        rv = inl - 16;
    OPENSSL_cleanse(icv, 8);
    OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
    OPENSSL_cleanse(iv, 8);
    OPENSSL_cleanse(ctx->iv, sizeof(ctx->iv));
    if (rv == -1)
        OPENSSL_cleanse(out, inl - 16);

    return rv;
}

static int des_ede3_wrap(PROV_CIPHER_CTX *ctx, unsigned char *out,
                         const unsigned char *in, size_t inl)
{
    unsigned char sha1tmp[SHA_DIGEST_LENGTH];
    size_t ivlen = TDES_IVLEN;
    size_t icvlen = TDES_IVLEN;
    size_t len = inl + ivlen + icvlen;

    if (out == NULL)
        return len;

    /* Copy input to output buffer + 8 so we have space for IV */
    memmove(out + ivlen, in, inl);
    /* Work out ICV */
    if (!ossl_sha1(in, inl, sha1tmp))
        return 0;
    memcpy(out + inl + ivlen, sha1tmp, icvlen);
    OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
    /* Generate random IV */
    if (RAND_bytes_ex(ctx->libctx, ctx->iv, ivlen, 0) <= 0)
        return 0;
    memcpy(out, ctx->iv, ivlen);
    /* Encrypt everything after IV in place */
    ctx->hw->cipher(ctx, out + ivlen, out + ivlen, inl + ivlen);
    BUF_reverse(out, NULL, len);
    memcpy(ctx->iv, wrap_iv, ivlen);
    ctx->hw->cipher(ctx, out, out, len);
    return len;
}

static int tdes_wrap_cipher_internal(PROV_CIPHER_CTX *ctx, unsigned char *out,
                                     const unsigned char *in, size_t inl)
{
    /*
     * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
     * is more than will ever be needed. Also input length must be a multiple
     * of 8 bits.
     */
    if (inl >= EVP_MAXCHUNK || inl % 8)
        return -1;
    if (ctx->enc)
        return des_ede3_wrap(ctx, out, in, inl);
    else
        return des_ede3_unwrap(ctx, out, in, inl);
}

static int tdes_wrap_cipher(void *vctx,
                            unsigned char *out, size_t *outl, size_t outsize,
                            const unsigned char *in, size_t inl)
{
    PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
    int ret;

    *outl = 0;
    if (!ossl_prov_is_running())
        return 0;

    if (outsize < inl) {
        ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
        return 0;
    }

    ret = tdes_wrap_cipher_internal(ctx, out, in, inl);
    if (ret <= 0)
        return 0;

    *outl = ret;
    return 1;
}

static int tdes_wrap_update(void *vctx, unsigned char *out, size_t *outl,
                            size_t outsize, const unsigned char *in,
                            size_t inl)
{
    *outl = 0;
    if (inl == 0)
        return 1;
    if (outsize < inl) {
        ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
        return 0;
    }

    if (!tdes_wrap_cipher(vctx, out, outl, outsize, in, inl)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
        return 0;
    }
    return 1;
}


# define IMPLEMENT_WRAP_CIPHER(flags, kbits, blkbits, ivbits)                  \
static OSSL_FUNC_cipher_newctx_fn tdes_wrap_newctx;                            \
static void *tdes_wrap_newctx(void *provctx)                                   \
{                                                                              \
    return ossl_tdes_newctx(provctx, EVP_CIPH_WRAP_MODE, kbits, blkbits,       \
                            ivbits, flags,                                     \
                            ossl_prov_cipher_hw_tdes_wrap_cbc());              \
}                                                                              \
static OSSL_FUNC_cipher_get_params_fn tdes_wrap_get_params;                    \
static int tdes_wrap_get_params(OSSL_PARAM params[])                           \
{                                                                              \
    return ossl_cipher_generic_get_params(params, EVP_CIPH_WRAP_MODE, flags,   \
                                          kbits, blkbits, ivbits);             \
}                                                                              \
const OSSL_DISPATCH ossl_tdes_wrap_cbc_functions[] =                           \
{                                                                              \
    { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void)) ossl_tdes_einit },       \
    { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void)) ossl_tdes_dinit },       \
    { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))tdes_wrap_cipher },             \
    { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))tdes_wrap_newctx },             \
    { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))ossl_tdes_freectx },           \
    { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))tdes_wrap_update },             \
    { OSSL_FUNC_CIPHER_FINAL,                                                  \
      (void (*)(void))ossl_cipher_generic_stream_final },                      \
    { OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))tdes_wrap_get_params },     \
    { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,                                        \
      (void (*)(void))ossl_cipher_generic_gettable_params },                   \
    { OSSL_FUNC_CIPHER_GET_CTX_PARAMS,                                         \
      (void (*)(void))ossl_tdes_get_ctx_params },                              \
    { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,                                    \
      (void (*)(void))ossl_tdes_gettable_ctx_params },                         \
    { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,                                         \
      (void (*)(void))ossl_cipher_generic_set_ctx_params },                    \
    { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,                                    \
      (void (*)(void))ossl_cipher_generic_settable_ctx_params },               \
    OSSL_DISPATCH_END                                                          \
}

/* ossl_tdes_wrap_cbc_functions */
IMPLEMENT_WRAP_CIPHER(TDES_WRAP_FLAGS, 64*3, 64, 0);

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2023 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		* DES and SHA-1 low level APIs are deprecated for public use, but still ok for
12		* internal use.
13		*/
14		#include "internal/deprecated.h"
15
16		#include <openssl/sha.h>
17		#include <openssl/rand.h>
18		#include <openssl/proverr.h>
19		#include "cipher_tdes_default.h"
20		#include "crypto/evp.h"
21		#include "crypto/sha.h"
22		#include "prov/implementations.h"
23		#include "prov/providercommon.h"
24
25		#define TDES_WRAP_FLAGS PROV_CIPHER_FLAG_CUSTOM_IV \| PROV_CIPHER_FLAG_RAND_KEY
26
27		static OSSL_FUNC_cipher_update_fn tdes_wrap_update;
28		static OSSL_FUNC_cipher_cipher_fn tdes_wrap_cipher;
29
30		static const unsigned char wrap_iv[8] =
31		{
32		0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05
33		};
34
35		static int des_ede3_unwrap(PROV_CIPHER_CTX ctx, unsigned char out,
36		const unsigned char *in, size_t inl)
37	0	{
38	0	unsigned char icv[8], iv[TDES_IVLEN], sha1tmp[SHA_DIGEST_LENGTH];
39	0	int rv = -1;
40
41	0	if (inl < 24)
42	0	return -1;
43	0	if (out == NULL)
44	0	return inl - 16;
45
46	0	memcpy(ctx->iv, wrap_iv, 8);
47		/* Decrypt first block which will end up as icv */
48	0	ctx->hw->cipher(ctx, icv, in, 8);
49		/* Decrypt central blocks */
50		/*
51		* If decrypting in place move whole output along a block so the next
52		* des_ede_cbc_cipher is in place.
53		*/
54	0	if (out == in) {
55	0	memmove(out, out + 8, inl - 8);
56	0	in -= 8;
57	0	}
58	0	ctx->hw->cipher(ctx, out, in + 8, inl - 16);
59		/* Decrypt final block which will be IV */
60	0	ctx->hw->cipher(ctx, iv, in + inl - 8, 8);
61		/* Reverse order of everything */
62	0	BUF_reverse(icv, NULL, 8);
63	0	BUF_reverse(out, NULL, inl - 16);
64	0	BUF_reverse(ctx->iv, iv, 8);
65		/* Decrypt again using new IV */
66	0	ctx->hw->cipher(ctx, out, out, inl - 16);
67	0	ctx->hw->cipher(ctx, icv, icv, 8);
68	0	if (ossl_sha1(out, inl - 16, sha1tmp) /* Work out hash of first portion */
69	0	&& CRYPTO_memcmp(sha1tmp, icv, 8) == 0)
70	0	rv = inl - 16;
71	0	OPENSSL_cleanse(icv, 8);
72	0	OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
73	0	OPENSSL_cleanse(iv, 8);
74	0	OPENSSL_cleanse(ctx->iv, sizeof(ctx->iv));
75	0	if (rv == -1)
76	0	OPENSSL_cleanse(out, inl - 16);
77
78	0	return rv;
79	0	}
80
81		static int des_ede3_wrap(PROV_CIPHER_CTX ctx, unsigned char out,
82		const unsigned char *in, size_t inl)
83	0	{
84	0	unsigned char sha1tmp[SHA_DIGEST_LENGTH];
85	0	size_t ivlen = TDES_IVLEN;
86	0	size_t icvlen = TDES_IVLEN;
87	0	size_t len = inl + ivlen + icvlen;
88
89	0	if (out == NULL)
90	0	return len;
91
92		/* Copy input to output buffer + 8 so we have space for IV */
93	0	memmove(out + ivlen, in, inl);
94		/* Work out ICV */
95	0	if (!ossl_sha1(in, inl, sha1tmp))
96	0	return 0;
97	0	memcpy(out + inl + ivlen, sha1tmp, icvlen);
98	0	OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
99		/* Generate random IV */
100	0	if (RAND_bytes_ex(ctx->libctx, ctx->iv, ivlen, 0) <= 0)
101	0	return 0;
102	0	memcpy(out, ctx->iv, ivlen);
103		/* Encrypt everything after IV in place */
104	0	ctx->hw->cipher(ctx, out + ivlen, out + ivlen, inl + ivlen);
105	0	BUF_reverse(out, NULL, len);
106	0	memcpy(ctx->iv, wrap_iv, ivlen);
107	0	ctx->hw->cipher(ctx, out, out, len);
108	0	return len;
109	0	}
110
111		static int tdes_wrap_cipher_internal(PROV_CIPHER_CTX ctx, unsigned char out,
112		const unsigned char *in, size_t inl)
113	0	{
114		/*
115		* Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
116		* is more than will ever be needed. Also input length must be a multiple
117		* of 8 bits.
118		*/
119	0	if (inl >= EVP_MAXCHUNK \|\| inl % 8)
120	0	return -1;
121	0	if (ctx->enc)
122	0	return des_ede3_wrap(ctx, out, in, inl);
123	0	else
124	0	return des_ede3_unwrap(ctx, out, in, inl);
125	0	}
126
127		static int tdes_wrap_cipher(void *vctx,
128		unsigned char out, size_t outl, size_t outsize,
129		const unsigned char *in, size_t inl)
130	0	{
131	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
132	0	int ret;
133
134	0	*outl = 0;
135	0	if (!ossl_prov_is_running())
136	0	return 0;
137
138	0	if (outsize < inl) {
139	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
140	0	return 0;
141	0	}
142
143	0	ret = tdes_wrap_cipher_internal(ctx, out, in, inl);
144	0	if (ret <= 0)
145	0	return 0;
146
147	0	*outl = ret;
148	0	return 1;
149	0	}
150
151		static int tdes_wrap_update(void vctx, unsigned char out, size_t *outl,
152		size_t outsize, const unsigned char *in,
153		size_t inl)
154	0	{
155	0	*outl = 0;
156	0	if (inl == 0)
157	0	return 1;
158	0	if (outsize < inl) {
159	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
160	0	return 0;
161	0	}
162
163	0	if (!tdes_wrap_cipher(vctx, out, outl, outsize, in, inl)) {
164	0	ERR_raise(ERR_LIB_PROV, PROV_R_CIPHER_OPERATION_FAILED);
165	0	return 0;
166	0	}
167	0	return 1;
168	0	}
169
170
171		# define IMPLEMENT_WRAP_CIPHER(flags, kbits, blkbits, ivbits) \
172		static OSSL_FUNC_cipher_newctx_fn tdes_wrap_newctx; \
173	0	static void tdes_wrap_newctx(void provctx) \
174	0	{ \
175	0	return ossl_tdes_newctx(provctx, EVP_CIPH_WRAP_MODE, kbits, blkbits, \
176	0	ivbits, flags, \
177	0	ossl_prov_cipher_hw_tdes_wrap_cbc()); \
178	0	} \
179		static OSSL_FUNC_cipher_get_params_fn tdes_wrap_get_params; \
180	25	static int tdes_wrap_get_params(OSSL_PARAM params[]) \
181	25	{ \
182	25	return ossl_cipher_generic_get_params(params, EVP_CIPH_WRAP_MODE, flags, \
183	25	kbits, blkbits, ivbits); \
184	25	} \
185		const OSSL_DISPATCH ossl_tdes_wrap_cbc_functions[] = \
186		{ \
187		{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void)) ossl_tdes_einit }, \
188		{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void)) ossl_tdes_dinit }, \
189		{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))tdes_wrap_cipher }, \
190		{ OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))tdes_wrap_newctx }, \
191		{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))ossl_tdes_freectx }, \
192		{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))tdes_wrap_update }, \
193		{ OSSL_FUNC_CIPHER_FINAL, \
194		(void (*)(void))ossl_cipher_generic_stream_final }, \
195		{ OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))tdes_wrap_get_params }, \
196		{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS, \
197		(void (*)(void))ossl_cipher_generic_gettable_params }, \
198		{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, \
199		(void (*)(void))ossl_tdes_get_ctx_params }, \
200		{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS, \
201		(void (*)(void))ossl_tdes_gettable_ctx_params }, \
202		{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS, \
203		(void (*)(void))ossl_cipher_generic_set_ctx_params }, \
204		{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS, \
205		(void (*)(void))ossl_cipher_generic_settable_ctx_params }, \
206		OSSL_DISPATCH_END \
207		}
208
209		/* ossl_tdes_wrap_cbc_functions */
210		IMPLEMENT_WRAP_CIPHER(TDES_WRAP_FLAGS, 64*3, 64, 0);