xref: /freebsd/crypto/openssl/apps/rsa.c (revision a25896ca1270e25b657ceaa8d47d5699515f5c25)
1 /*
2  * Copyright 1995-2018 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 <openssl/opensslconf.h>
11 #ifdef OPENSSL_NO_RSA
12 NON_EMPTY_TRANSLATION_UNIT
13 #else
14 
15 # include <stdio.h>
16 # include <stdlib.h>
17 # include <string.h>
18 # include <time.h>
19 # include "apps.h"
20 # include "progs.h"
21 # include <openssl/bio.h>
22 # include <openssl/err.h>
23 # include <openssl/rsa.h>
24 # include <openssl/evp.h>
25 # include <openssl/x509.h>
26 # include <openssl/pem.h>
27 # include <openssl/bn.h>
28 
29 typedef enum OPTION_choice {
30     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
31     OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_IN, OPT_OUT,
32     OPT_PUBIN, OPT_PUBOUT, OPT_PASSOUT, OPT_PASSIN,
33     OPT_RSAPUBKEY_IN, OPT_RSAPUBKEY_OUT,
34     /* Do not change the order here; see case statements below */
35     OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG,
36     OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_CHECK, OPT_CIPHER
37 } OPTION_CHOICE;
38 
39 const OPTIONS rsa_options[] = {
40     {"help", OPT_HELP, '-', "Display this summary"},
41     {"inform", OPT_INFORM, 'f', "Input format, one of DER NET PEM"},
42     {"outform", OPT_OUTFORM, 'f', "Output format, one of DER NET PEM PVK"},
43     {"in", OPT_IN, 's', "Input file"},
44     {"out", OPT_OUT, '>', "Output file"},
45     {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"},
46     {"pubout", OPT_PUBOUT, '-', "Output a public key"},
47     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
48     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
49     {"RSAPublicKey_in", OPT_RSAPUBKEY_IN, '-', "Input is an RSAPublicKey"},
50     {"RSAPublicKey_out", OPT_RSAPUBKEY_OUT, '-', "Output is an RSAPublicKey"},
51     {"noout", OPT_NOOUT, '-', "Don't print key out"},
52     {"text", OPT_TEXT, '-', "Print the key in text"},
53     {"modulus", OPT_MODULUS, '-', "Print the RSA key modulus"},
54     {"check", OPT_CHECK, '-', "Verify key consistency"},
55     {"", OPT_CIPHER, '-', "Any supported cipher"},
56 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
57     {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"},
58     {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"},
59     {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"},
60 # endif
61 # ifndef OPENSSL_NO_ENGINE
62     {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
63 # endif
64     {NULL}
65 };
66 
67 int rsa_main(int argc, char **argv)
68 {
69     ENGINE *e = NULL;
70     BIO *out = NULL;
71     RSA *rsa = NULL;
72     const EVP_CIPHER *enc = NULL;
73     char *infile = NULL, *outfile = NULL, *prog;
74     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
75     int i, private = 0;
76     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, check = 0;
77     int noout = 0, modulus = 0, pubin = 0, pubout = 0, ret = 1;
78 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
79     int pvk_encr = 2;
80 # endif
81     OPTION_CHOICE o;
82 
83     prog = opt_init(argc, argv, rsa_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(rsa_options);
93             ret = 0;
94             goto end;
95         case OPT_INFORM:
96             if (!opt_format(opt_arg(), OPT_FMT_ANY, &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_ANY, &outformat))
104                 goto opthelp;
105             break;
106         case OPT_OUT:
107             outfile = opt_arg();
108             break;
109         case OPT_PASSIN:
110             passinarg = opt_arg();
111             break;
112         case OPT_PASSOUT:
113             passoutarg = opt_arg();
114             break;
115         case OPT_ENGINE:
116             e = setup_engine(opt_arg(), 0);
117             break;
118         case OPT_PUBIN:
119             pubin = 1;
120             break;
121         case OPT_PUBOUT:
122             pubout = 1;
123             break;
124         case OPT_RSAPUBKEY_IN:
125             pubin = 2;
126             break;
127         case OPT_RSAPUBKEY_OUT:
128             pubout = 2;
129             break;
130         case OPT_PVK_STRONG:    /* pvk_encr:= 2 */
131         case OPT_PVK_WEAK:      /* pvk_encr:= 1 */
132         case OPT_PVK_NONE:      /* pvk_encr:= 0 */
133 # if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_RC4)
134             pvk_encr = (o - OPT_PVK_NONE);
135 # endif
136             break;
137         case OPT_NOOUT:
138             noout = 1;
139             break;
140         case OPT_TEXT:
141             text = 1;
142             break;
143         case OPT_MODULUS:
144             modulus = 1;
145             break;
146         case OPT_CHECK:
147             check = 1;
148             break;
149         case OPT_CIPHER:
150             if (!opt_cipher(opt_unknown(), &enc))
151                 goto opthelp;
152             break;
153         }
154     }
155     argc = opt_num_rest();
156     if (argc != 0)
157         goto opthelp;
158 
159     private = (text && !pubin) || (!pubout && !noout) ? 1 : 0;
160 
161     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
162         BIO_printf(bio_err, "Error getting passwords\n");
163         goto end;
164     }
165     if (check && pubin) {
166         BIO_printf(bio_err, "Only private keys can be checked\n");
167         goto end;
168     }
169 
170     {
171         EVP_PKEY *pkey;
172 
173         if (pubin) {
174             int tmpformat = -1;
175             if (pubin == 2) {
176                 if (informat == FORMAT_PEM)
177                     tmpformat = FORMAT_PEMRSA;
178                 else if (informat == FORMAT_ASN1)
179                     tmpformat = FORMAT_ASN1RSA;
180             } else {
181                 tmpformat = informat;
182             }
183 
184             pkey = load_pubkey(infile, tmpformat, 1, passin, e, "Public Key");
185         } else {
186             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
187         }
188 
189         if (pkey != NULL)
190             rsa = EVP_PKEY_get1_RSA(pkey);
191         EVP_PKEY_free(pkey);
192     }
193 
194     if (rsa == NULL) {
195         ERR_print_errors(bio_err);
196         goto end;
197     }
198 
199     out = bio_open_owner(outfile, outformat, private);
200     if (out == NULL)
201         goto end;
202 
203     if (text) {
204         assert(pubin || private);
205         if (!RSA_print(out, rsa, 0)) {
206             perror(outfile);
207             ERR_print_errors(bio_err);
208             goto end;
209         }
210     }
211 
212     if (modulus) {
213         const BIGNUM *n;
214         RSA_get0_key(rsa, &n, NULL, NULL);
215         BIO_printf(out, "Modulus=");
216         BN_print(out, n);
217         BIO_printf(out, "\n");
218     }
219 
220     if (check) {
221         int r = RSA_check_key_ex(rsa, NULL);
222 
223         if (r == 1) {
224             BIO_printf(out, "RSA key ok\n");
225         } else if (r == 0) {
226             unsigned long err;
227 
228             while ((err = ERR_peek_error()) != 0 &&
229                    ERR_GET_LIB(err) == ERR_LIB_RSA &&
230                    ERR_GET_FUNC(err) == RSA_F_RSA_CHECK_KEY_EX &&
231                    ERR_GET_REASON(err) != ERR_R_MALLOC_FAILURE) {
232                 BIO_printf(out, "RSA key error: %s\n",
233                            ERR_reason_error_string(err));
234                 ERR_get_error(); /* remove err from error stack */
235             }
236         } else if (r == -1) {
237             ERR_print_errors(bio_err);
238             goto end;
239         }
240     }
241 
242     if (noout) {
243         ret = 0;
244         goto end;
245     }
246     BIO_printf(bio_err, "writing RSA key\n");
247     if (outformat == FORMAT_ASN1) {
248         if (pubout || pubin) {
249             if (pubout == 2)
250                 i = i2d_RSAPublicKey_bio(out, rsa);
251             else
252                 i = i2d_RSA_PUBKEY_bio(out, rsa);
253         } else {
254             assert(private);
255             i = i2d_RSAPrivateKey_bio(out, rsa);
256         }
257     } else if (outformat == FORMAT_PEM) {
258         if (pubout || pubin) {
259             if (pubout == 2)
260                 i = PEM_write_bio_RSAPublicKey(out, rsa);
261             else
262                 i = PEM_write_bio_RSA_PUBKEY(out, rsa);
263         } else {
264             assert(private);
265             i = PEM_write_bio_RSAPrivateKey(out, rsa,
266                                             enc, NULL, 0, NULL, passout);
267         }
268 # ifndef OPENSSL_NO_DSA
269     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
270         EVP_PKEY *pk;
271         pk = EVP_PKEY_new();
272         EVP_PKEY_set1_RSA(pk, rsa);
273         if (outformat == FORMAT_PVK) {
274             if (pubin) {
275                 BIO_printf(bio_err, "PVK form impossible with public key input\n");
276                 EVP_PKEY_free(pk);
277                 goto end;
278             }
279             assert(private);
280 #  ifdef OPENSSL_NO_RC4
281             BIO_printf(bio_err, "PVK format not supported\n");
282             EVP_PKEY_free(pk);
283             goto end;
284 #  else
285             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
286 #  endif
287         } else if (pubin || pubout) {
288             i = i2b_PublicKey_bio(out, pk);
289         } else {
290             assert(private);
291             i = i2b_PrivateKey_bio(out, pk);
292         }
293         EVP_PKEY_free(pk);
294 # endif
295     } else {
296         BIO_printf(bio_err, "bad output format specified for outfile\n");
297         goto end;
298     }
299     if (i <= 0) {
300         BIO_printf(bio_err, "unable to write key\n");
301         ERR_print_errors(bio_err);
302     } else {
303         ret = 0;
304     }
305  end:
306     release_engine(e);
307     BIO_free_all(out);
308     RSA_free(rsa);
309     OPENSSL_free(passin);
310     OPENSSL_free(passout);
311     return ret;
312 }
313 #endif
314