aboutsummaryrefslogtreecommitdiffstats
path: root/lib/crypto/c_src/otp_test_engine.c
blob: 5c6122c06ac29698ab3cb1fdc764ca1710938636 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 2017-2017. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * %CopyrightEnd%
 */

#ifdef _WIN32
#define OPENSSL_OPT_WINDLL
#endif
#include <stdio.h>
#include <string.h>

#include <openssl/engine.h>
#include <openssl/md5.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>

#define PACKED_OPENSSL_VERSION(MAJ, MIN, FIX, P)	\
    ((((((((MAJ << 8) | MIN) << 8 ) | FIX) << 8) | (P-'a'+1)) << 4) | 0xf)

#define PACKED_OPENSSL_VERSION_PLAIN(MAJ, MIN, FIX) \
    PACKED_OPENSSL_VERSION(MAJ,MIN,FIX,('a'-1))

#if OPENSSL_VERSION_NUMBER < PACKED_OPENSSL_VERSION_PLAIN(1,1,0) \
    || defined(LIBRESSL_VERSION_NUMBER)
#define OLD
#endif

static const char *test_engine_id = "MD5";
static const char *test_engine_name = "MD5 test engine";

/* The callback that does the job of fetching keys on demand by the Engine */
EVP_PKEY* test_key_load(ENGINE *er, const char *id, UI_METHOD *ui_method, void *callback_data);


static int test_init(ENGINE *e) {
    printf("OTP Test Engine Initializatzion!\r\n");
    
    /* Load all digest and cipher algorithms. Needed for password protected private keys */
    OpenSSL_add_all_algorithms();

    return 111;
}

static void add_test_data(unsigned char *md, unsigned int len)
{
    unsigned int i;

    for (i=0; i<len; i++) {
        md[i] = (unsigned char)(i & 0xff);
    }
}

/* MD5 part */
#undef data
#ifdef OLD
#define data(ctx) ((MD5_CTX *)ctx->md_data)
#endif

static int test_engine_md5_init(EVP_MD_CTX *ctx) {
    fprintf(stderr, "MD5 initialized\r\n");
#ifdef OLD
    return MD5_Init(data(ctx));
#else
    return 1;
#endif
}

static int test_engine_md5_update(EVP_MD_CTX *ctx,const void *data, size_t count)
{
    fprintf(stderr, "MD5 update\r\n");
#ifdef OLD
    return MD5_Update(data(ctx), data, (size_t)count);
#else
    return 1;
#endif
}

static int test_engine_md5_final(EVP_MD_CTX *ctx,unsigned char *md) {
#ifdef OLD
    int ret;

    fprintf(stderr, "MD5 final size of EVP_MD: %lu\r\n", sizeof(EVP_MD));
    ret = MD5_Final(md, data(ctx));

    if (ret > 0) {
         add_test_data(md, MD5_DIGEST_LENGTH);
    }
    return ret;
#else
    fprintf(stderr, "MD5 final\r\n");
    add_test_data(md, MD5_DIGEST_LENGTH);
    return 1;
#endif
}

#ifdef OLD
static EVP_MD test_engine_md5_method=  {
        NID_md5,                      /* The name ID for MD5 */
        NID_undef,                    /* IGNORED: MD5 with private key encryption NID */
        MD5_DIGEST_LENGTH,            /* Size of MD5 result, in bytes */
        0,                            /* Flags */
        test_engine_md5_init,         /* digest init */
        test_engine_md5_update,       /* digest update */
        test_engine_md5_final,        /* digest final */
        NULL,                         /* digest copy */
        NULL,                         /* digest cleanup */
        EVP_PKEY_NULL_method,         /* IGNORED: pkey methods */
        MD5_CBLOCK,                   /* Internal blocksize, see rfc1321/md5.h */
        sizeof(EVP_MD *) + sizeof(MD5_CTX),
        NULL,                          /* IGNORED: control function */
};
#endif

static int test_digest_ids[] = {NID_md5};

static int test_engine_digest_selector(ENGINE *e, const EVP_MD **digest,
        const int **nids, int nid) {
    int ok = 1;
    if (!digest) {
        *nids = test_digest_ids;
        fprintf(stderr, "Digest is empty! Nid:%d\r\n", nid);
        return 2;
    }
    fprintf(stderr, "Digest no %d requested\r\n",nid);
    if (nid == NID_md5) {
#ifdef OLD
        *digest = &test_engine_md5_method;
#else
        EVP_MD *md = EVP_MD_meth_new(NID_md5, NID_undef);
        if (!md ||
            !EVP_MD_meth_set_result_size(md, MD5_DIGEST_LENGTH) ||
            !EVP_MD_meth_set_flags(md, 0) ||
            !EVP_MD_meth_set_init(md,  test_engine_md5_init) ||
            !EVP_MD_meth_set_update(md,  test_engine_md5_update) ||
            !EVP_MD_meth_set_final(md,  test_engine_md5_final) ||
            !EVP_MD_meth_set_copy(md,  NULL) ||
            !EVP_MD_meth_set_cleanup(md,  NULL) ||
            !EVP_MD_meth_set_input_blocksize(md, MD5_CBLOCK) ||
            !EVP_MD_meth_set_app_datasize(md, sizeof(EVP_MD *) + sizeof(MD5_CTX)) ||
            !EVP_MD_meth_set_ctrl(md, NULL))
            {
                ok = 0;
                *digest = NULL;
            } else
            {
                *digest = md;
            }
#endif
    }
    else {
        ok = 0;
        *digest = NULL;
    }
    
    return ok;
}


static int bind_helper(ENGINE * e, const char *id)
{
    if (!ENGINE_set_id(e, test_engine_id) ||
        !ENGINE_set_name(e, test_engine_name) ||
        !ENGINE_set_init_function(e, test_init) ||
        !ENGINE_set_digests(e, &test_engine_digest_selector) ||
        /* For testing of key storage in an Engine: */
        !ENGINE_set_load_privkey_function(e, &test_key_load) ||
        !ENGINE_set_load_pubkey_function(e, &test_key_load)
    )
        return 0;

    return 1;
}

IMPLEMENT_DYNAMIC_CHECK_FN();

IMPLEMENT_DYNAMIC_BIND_FN(bind_helper);

/********************************************************
 *
 * Engine storage simulation
 *
 */
int pem_passwd_cb_fun(char *buf, int size, int rwflag, void *password);

EVP_PKEY* test_key_load(ENGINE *er, const char *id, UI_METHOD *ui_method, void *callback_data)
{
    EVP_PKEY *pkey = NULL;
    FILE *f = fopen(id, "r");

    if (!f) {
            fprintf(stderr, "%s:%d fopen(%s) failed\r\n", __FILE__,__LINE__,id);
            return NULL;
    }

    /* First try to read as a private key. If that fails, try to read as a public key: */
    pkey = PEM_read_PrivateKey(f, NULL, pem_passwd_cb_fun, callback_data);
    if (!pkey) {
        /* ERR_print_errors_fp (stderr); */
        fclose(f);
        f = fopen(id, "r");
        pkey = PEM_read_PUBKEY(f, NULL, NULL, NULL);
    }
    fclose(f);
    
    if (!pkey) {
        fprintf(stderr, "%s:%d Key read from file %s failed.\r\n", __FILE__,__LINE__,id);
        if (callback_data) 
            fprintf(stderr, "Pwd = \"%s\".\r\n", (char *)callback_data);
        fprintf(stderr, "Contents of file \"%s\":\r\n",id);
        f = fopen(id, "r");
        { /* Print the contents of the key file */
            char c;
            while (!feof(f)) {
                switch (c=fgetc(f)) {
                case '\n':
                case '\r': putc('\r',stderr); putc('\n',stderr); break;
                default: putc(c, stderr);
                }
            }
        }
        fprintf(stderr, "File contents printed.\r\n");
        fclose(f);
        return NULL;
    }
    
    return pkey;
}


int pem_passwd_cb_fun(char *buf, int size, int rwflag, void *password) 
{ 
    int i;

    fprintf(stderr, "In pem_passwd_cb_fun\r\n");
    if (!password)
        return 0;

    i = strlen(password);
    if (i < size) {
        /* whole pwd (incl terminating 0) fits */
        fprintf(stderr, "Got FULL pwd %d(%d) chars\r\n", i, size);
        memcpy(buf, (char*)password, i+1);
        return i+1;
    } else {
        fprintf(stderr, "Got TO LONG pwd %d(%d) chars\r\n", i, size);
        /* meaningless with a truncated password */
        return 0;
    }
}