1/*
2 * Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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#include <stdio.h>
11#include <stdlib.h>
12#include <string.h>
13#include "apps.h"
14#include "progs.h"
15#include <openssl/pem.h>
16#include <openssl/err.h>
17#include <openssl/evp.h>
18#include <openssl/pkcs12.h>
19
20typedef enum OPTION_choice {
21    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
22    OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
23    OPT_TOPK8, OPT_NOITER, OPT_NOCRYPT,
24#ifndef OPENSSL_NO_SCRYPT
25    OPT_SCRYPT, OPT_SCRYPT_N, OPT_SCRYPT_R, OPT_SCRYPT_P,
26#endif
27    OPT_V2, OPT_V1, OPT_V2PRF, OPT_ITER, OPT_PASSIN, OPT_PASSOUT,
28    OPT_TRADITIONAL,
29    OPT_R_ENUM
30} OPTION_CHOICE;
31
32const OPTIONS pkcs8_options[] = {
33    {"help", OPT_HELP, '-', "Display this summary"},
34    {"inform", OPT_INFORM, 'F', "Input format (DER or PEM)"},
35    {"outform", OPT_OUTFORM, 'F', "Output format (DER or PEM)"},
36    {"in", OPT_IN, '<', "Input file"},
37    {"out", OPT_OUT, '>', "Output file"},
38    {"topk8", OPT_TOPK8, '-', "Output PKCS8 file"},
39    {"noiter", OPT_NOITER, '-', "Use 1 as iteration count"},
40    {"nocrypt", OPT_NOCRYPT, '-', "Use or expect unencrypted private key"},
41    OPT_R_OPTIONS,
42    {"v2", OPT_V2, 's', "Use PKCS#5 v2.0 and cipher"},
43    {"v1", OPT_V1, 's', "Use PKCS#5 v1.5 and cipher"},
44    {"v2prf", OPT_V2PRF, 's', "Set the PRF algorithm to use with PKCS#5 v2.0"},
45    {"iter", OPT_ITER, 'p', "Specify the iteration count"},
46    {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
47    {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
48    {"traditional", OPT_TRADITIONAL, '-', "use traditional format private key"},
49#ifndef OPENSSL_NO_ENGINE
50    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
51#endif
52#ifndef OPENSSL_NO_SCRYPT
53    {"scrypt", OPT_SCRYPT, '-', "Use scrypt algorithm"},
54    {"scrypt_N", OPT_SCRYPT_N, 's', "Set scrypt N parameter"},
55    {"scrypt_r", OPT_SCRYPT_R, 's', "Set scrypt r parameter"},
56    {"scrypt_p", OPT_SCRYPT_P, 's', "Set scrypt p parameter"},
57#endif
58    {NULL}
59};
60
61int pkcs8_main(int argc, char **argv)
62{
63    BIO *in = NULL, *out = NULL;
64    ENGINE *e = NULL;
65    EVP_PKEY *pkey = NULL;
66    PKCS8_PRIV_KEY_INFO *p8inf = NULL;
67    X509_SIG *p8 = NULL;
68    const EVP_CIPHER *cipher = NULL;
69    char *infile = NULL, *outfile = NULL;
70    char *passinarg = NULL, *passoutarg = NULL, *prog;
71#ifndef OPENSSL_NO_UI_CONSOLE
72    char pass[APP_PASS_LEN];
73#endif
74    char *passin = NULL, *passout = NULL, *p8pass = NULL;
75    OPTION_CHOICE o;
76    int nocrypt = 0, ret = 1, iter = PKCS12_DEFAULT_ITER;
77    int informat = FORMAT_PEM, outformat = FORMAT_PEM, topk8 = 0, pbe_nid = -1;
78    int private = 0, traditional = 0;
79#ifndef OPENSSL_NO_SCRYPT
80    long scrypt_N = 0, scrypt_r = 0, scrypt_p = 0;
81#endif
82
83    prog = opt_init(argc, argv, pkcs8_options);
84    while ((o = opt_next()) != OPT_EOF) {
85        switch (o) {
86        case OPT_EOF:
87        case OPT_ERR:
88 opthelp:
89            BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
90            goto end;
91        case OPT_HELP:
92            opt_help(pkcs8_options);
93            ret = 0;
94            goto end;
95        case OPT_INFORM:
96            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
97                goto opthelp;
98            break;
99        case OPT_IN:
100            infile = opt_arg();
101            break;
102        case OPT_OUTFORM:
103            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
104                goto opthelp;
105            break;
106        case OPT_OUT:
107            outfile = opt_arg();
108            break;
109        case OPT_TOPK8:
110            topk8 = 1;
111            break;
112        case OPT_NOITER:
113            iter = 1;
114            break;
115        case OPT_NOCRYPT:
116            nocrypt = 1;
117            break;
118        case OPT_R_CASES:
119            if (!opt_rand(o))
120                goto end;
121            break;
122        case OPT_TRADITIONAL:
123            traditional = 1;
124            break;
125        case OPT_V2:
126            if (!opt_cipher(opt_arg(), &cipher))
127                goto opthelp;
128            break;
129        case OPT_V1:
130            pbe_nid = OBJ_txt2nid(opt_arg());
131            if (pbe_nid == NID_undef) {
132                BIO_printf(bio_err,
133                           "%s: Unknown PBE algorithm %s\n", prog, opt_arg());
134                goto opthelp;
135            }
136            break;
137        case OPT_V2PRF:
138            pbe_nid = OBJ_txt2nid(opt_arg());
139            if (!EVP_PBE_find(EVP_PBE_TYPE_PRF, pbe_nid, NULL, NULL, 0)) {
140                BIO_printf(bio_err,
141                           "%s: Unknown PRF algorithm %s\n", prog, opt_arg());
142                goto opthelp;
143            }
144            if (cipher == NULL)
145                cipher = EVP_aes_256_cbc();
146            break;
147        case OPT_ITER:
148            if (!opt_int(opt_arg(), &iter))
149                goto opthelp;
150            break;
151        case OPT_PASSIN:
152            passinarg = opt_arg();
153            break;
154        case OPT_PASSOUT:
155            passoutarg = opt_arg();
156            break;
157        case OPT_ENGINE:
158            e = setup_engine(opt_arg(), 0);
159            break;
160#ifndef OPENSSL_NO_SCRYPT
161        case OPT_SCRYPT:
162            scrypt_N = 16384;
163            scrypt_r = 8;
164            scrypt_p = 1;
165            if (cipher == NULL)
166                cipher = EVP_aes_256_cbc();
167            break;
168        case OPT_SCRYPT_N:
169            if (!opt_long(opt_arg(), &scrypt_N) || scrypt_N <= 0)
170                goto opthelp;
171            break;
172        case OPT_SCRYPT_R:
173            if (!opt_long(opt_arg(), &scrypt_r) || scrypt_r <= 0)
174                goto opthelp;
175            break;
176        case OPT_SCRYPT_P:
177            if (!opt_long(opt_arg(), &scrypt_p) || scrypt_p <= 0)
178                goto opthelp;
179            break;
180#endif
181        }
182    }
183    argc = opt_num_rest();
184    if (argc != 0)
185        goto opthelp;
186
187    private = 1;
188
189    if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
190        BIO_printf(bio_err, "Error getting passwords\n");
191        goto end;
192    }
193
194    if ((pbe_nid == -1) && cipher == NULL)
195        cipher = EVP_aes_256_cbc();
196
197    in = bio_open_default(infile, 'r', informat);
198    if (in == NULL)
199        goto end;
200    out = bio_open_owner(outfile, outformat, private);
201    if (out == NULL)
202        goto end;
203
204    if (topk8) {
205        pkey = load_key(infile, informat, 1, passin, e, "key");
206        if (pkey == NULL)
207            goto end;
208        if ((p8inf = EVP_PKEY2PKCS8(pkey)) == NULL) {
209            BIO_printf(bio_err, "Error converting key\n");
210            ERR_print_errors(bio_err);
211            goto end;
212        }
213        if (nocrypt) {
214            assert(private);
215            if (outformat == FORMAT_PEM) {
216                PEM_write_bio_PKCS8_PRIV_KEY_INFO(out, p8inf);
217            } else if (outformat == FORMAT_ASN1) {
218                i2d_PKCS8_PRIV_KEY_INFO_bio(out, p8inf);
219            } else {
220                BIO_printf(bio_err, "Bad format specified for key\n");
221                goto end;
222            }
223        } else {
224            X509_ALGOR *pbe;
225            if (cipher) {
226#ifndef OPENSSL_NO_SCRYPT
227                if (scrypt_N && scrypt_r && scrypt_p)
228                    pbe = PKCS5_pbe2_set_scrypt(cipher, NULL, 0, NULL,
229                                                scrypt_N, scrypt_r, scrypt_p);
230                else
231#endif
232                    pbe = PKCS5_pbe2_set_iv(cipher, iter, NULL, 0, NULL,
233                                            pbe_nid);
234            } else {
235                pbe = PKCS5_pbe_set(pbe_nid, iter, NULL, 0);
236            }
237            if (pbe == NULL) {
238                BIO_printf(bio_err, "Error setting PBE algorithm\n");
239                ERR_print_errors(bio_err);
240                goto end;
241            }
242            if (passout != NULL) {
243                p8pass = passout;
244            } else if (1) {
245                /* To avoid bit rot */
246#ifndef OPENSSL_NO_UI_CONSOLE
247                p8pass = pass;
248                if (EVP_read_pw_string
249                    (pass, sizeof(pass), "Enter Encryption Password:", 1)) {
250                    X509_ALGOR_free(pbe);
251                    goto end;
252                }
253            } else {
254#endif
255                BIO_printf(bio_err, "Password required\n");
256                goto end;
257            }
258            p8 = PKCS8_set0_pbe(p8pass, strlen(p8pass), p8inf, pbe);
259            if (p8 == NULL) {
260                X509_ALGOR_free(pbe);
261                BIO_printf(bio_err, "Error encrypting key\n");
262                ERR_print_errors(bio_err);
263                goto end;
264            }
265            assert(private);
266            if (outformat == FORMAT_PEM)
267                PEM_write_bio_PKCS8(out, p8);
268            else if (outformat == FORMAT_ASN1)
269                i2d_PKCS8_bio(out, p8);
270            else {
271                BIO_printf(bio_err, "Bad format specified for key\n");
272                goto end;
273            }
274        }
275
276        ret = 0;
277        goto end;
278    }
279
280    if (nocrypt) {
281        if (informat == FORMAT_PEM) {
282            p8inf = PEM_read_bio_PKCS8_PRIV_KEY_INFO(in, NULL, NULL, NULL);
283        } else if (informat == FORMAT_ASN1) {
284            p8inf = d2i_PKCS8_PRIV_KEY_INFO_bio(in, NULL);
285        } else {
286            BIO_printf(bio_err, "Bad format specified for key\n");
287            goto end;
288        }
289    } else {
290        if (informat == FORMAT_PEM) {
291            p8 = PEM_read_bio_PKCS8(in, NULL, NULL, NULL);
292        } else if (informat == FORMAT_ASN1) {
293            p8 = d2i_PKCS8_bio(in, NULL);
294        } else {
295            BIO_printf(bio_err, "Bad format specified for key\n");
296            goto end;
297        }
298
299        if (p8 == NULL) {
300            BIO_printf(bio_err, "Error reading key\n");
301            ERR_print_errors(bio_err);
302            goto end;
303        }
304        if (passin != NULL) {
305            p8pass = passin;
306        } else if (1) {
307#ifndef OPENSSL_NO_UI_CONSOLE
308            p8pass = pass;
309            if (EVP_read_pw_string(pass, sizeof(pass), "Enter Password:", 0)) {
310                BIO_printf(bio_err, "Can't read Password\n");
311                goto end;
312            }
313        } else {
314#endif
315            BIO_printf(bio_err, "Password required\n");
316            goto end;
317        }
318        p8inf = PKCS8_decrypt(p8, p8pass, strlen(p8pass));
319    }
320
321    if (p8inf == NULL) {
322        BIO_printf(bio_err, "Error decrypting key\n");
323        ERR_print_errors(bio_err);
324        goto end;
325    }
326
327    if ((pkey = EVP_PKCS82PKEY(p8inf)) == NULL) {
328        BIO_printf(bio_err, "Error converting key\n");
329        ERR_print_errors(bio_err);
330        goto end;
331    }
332
333    assert(private);
334    if (outformat == FORMAT_PEM) {
335        if (traditional)
336            PEM_write_bio_PrivateKey_traditional(out, pkey, NULL, NULL, 0,
337                                                 NULL, passout);
338        else
339            PEM_write_bio_PrivateKey(out, pkey, NULL, NULL, 0, NULL, passout);
340    } else if (outformat == FORMAT_ASN1) {
341        i2d_PrivateKey_bio(out, pkey);
342    } else {
343        BIO_printf(bio_err, "Bad format specified for key\n");
344        goto end;
345    }
346    ret = 0;
347
348 end:
349    X509_SIG_free(p8);
350    PKCS8_PRIV_KEY_INFO_free(p8inf);
351    EVP_PKEY_free(pkey);
352    release_engine(e);
353    BIO_free_all(out);
354    BIO_free(in);
355    OPENSSL_free(passin);
356    OPENSSL_free(passout);
357
358    return ret;
359}
360