1 /* 2 * Copyright 1995-2020 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 #include <stdio.h> 12 #include <stdlib.h> 13 #include <string.h> 14 #include <time.h> 15 #include "apps.h" 16 #include "progs.h" 17 #include <openssl/bio.h> 18 #include <openssl/err.h> 19 #include <openssl/dsa.h> 20 #include <openssl/evp.h> 21 #include <openssl/x509.h> 22 #include <openssl/pem.h> 23 #include <openssl/bn.h> 24 25 typedef enum OPTION_choice { 26 OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, 27 OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_ENGINE, 28 /* Do not change the order here; see case statements below */ 29 OPT_PVK_NONE, OPT_PVK_WEAK, OPT_PVK_STRONG, 30 OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN, 31 OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT 32 } OPTION_CHOICE; 33 34 const OPTIONS dsa_options[] = { 35 {"help", OPT_HELP, '-', "Display this summary"}, 36 {"inform", OPT_INFORM, 'f', "Input format, DER PEM PVK"}, 37 {"outform", OPT_OUTFORM, 'f', "Output format, DER PEM PVK"}, 38 {"in", OPT_IN, 's', "Input key"}, 39 {"out", OPT_OUT, '>', "Output file"}, 40 {"noout", OPT_NOOUT, '-', "Don't print key out"}, 41 {"text", OPT_TEXT, '-', "Print the key in text"}, 42 {"modulus", OPT_MODULUS, '-', "Print the DSA public value"}, 43 {"pubin", OPT_PUBIN, '-', "Expect a public key in input file"}, 44 {"pubout", OPT_PUBOUT, '-', "Output public key, not private"}, 45 {"passin", OPT_PASSIN, 's', "Input file pass phrase source"}, 46 {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"}, 47 {"", OPT_CIPHER, '-', "Any supported cipher"}, 48 #ifndef OPENSSL_NO_RC4 49 {"pvk-strong", OPT_PVK_STRONG, '-', "Enable 'Strong' PVK encoding level (default)"}, 50 {"pvk-weak", OPT_PVK_WEAK, '-', "Enable 'Weak' PVK encoding level"}, 51 {"pvk-none", OPT_PVK_NONE, '-', "Don't enforce PVK encoding"}, 52 #endif 53 #ifndef OPENSSL_NO_ENGINE 54 {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"}, 55 #endif 56 {NULL} 57 }; 58 59 int dsa_main(int argc, char **argv) 60 { 61 BIO *out = NULL; 62 DSA *dsa = NULL; 63 ENGINE *e = NULL; 64 const EVP_CIPHER *enc = NULL; 65 char *infile = NULL, *outfile = NULL, *prog; 66 char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL; 67 OPTION_CHOICE o; 68 int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0; 69 int i, modulus = 0, pubin = 0, pubout = 0, ret = 1; 70 #ifndef OPENSSL_NO_RC4 71 int pvk_encr = 2; 72 #endif 73 int private = 0; 74 75 prog = opt_init(argc, argv, dsa_options); 76 while ((o = opt_next()) != OPT_EOF) { 77 switch (o) { 78 case OPT_EOF: 79 case OPT_ERR: 80 opthelp: 81 ret = 0; 82 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); 83 goto end; 84 case OPT_HELP: 85 opt_help(dsa_options); 86 ret = 0; 87 goto end; 88 case OPT_INFORM: 89 if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat)) 90 goto opthelp; 91 break; 92 case OPT_IN: 93 infile = opt_arg(); 94 break; 95 case OPT_OUTFORM: 96 if (!opt_format(opt_arg(), OPT_FMT_ANY, &outformat)) 97 goto opthelp; 98 break; 99 case OPT_OUT: 100 outfile = opt_arg(); 101 break; 102 case OPT_ENGINE: 103 e = setup_engine(opt_arg(), 0); 104 break; 105 case OPT_PASSIN: 106 passinarg = opt_arg(); 107 break; 108 case OPT_PASSOUT: 109 passoutarg = opt_arg(); 110 break; 111 case OPT_PVK_STRONG: /* pvk_encr:= 2 */ 112 case OPT_PVK_WEAK: /* pvk_encr:= 1 */ 113 case OPT_PVK_NONE: /* pvk_encr:= 0 */ 114 #ifndef OPENSSL_NO_RC4 115 pvk_encr = (o - OPT_PVK_NONE); 116 #endif 117 break; 118 case OPT_NOOUT: 119 noout = 1; 120 break; 121 case OPT_TEXT: 122 text = 1; 123 break; 124 case OPT_MODULUS: 125 modulus = 1; 126 break; 127 case OPT_PUBIN: 128 pubin = 1; 129 break; 130 case OPT_PUBOUT: 131 pubout = 1; 132 break; 133 case OPT_CIPHER: 134 if (!opt_cipher(opt_unknown(), &enc)) 135 goto end; 136 break; 137 } 138 } 139 argc = opt_num_rest(); 140 if (argc != 0) 141 goto opthelp; 142 143 private = pubin || pubout ? 0 : 1; 144 if (text && !pubin) 145 private = 1; 146 147 if (!app_passwd(passinarg, passoutarg, &passin, &passout)) { 148 BIO_printf(bio_err, "Error getting passwords\n"); 149 goto end; 150 } 151 152 BIO_printf(bio_err, "read DSA key\n"); 153 { 154 EVP_PKEY *pkey; 155 156 if (pubin) 157 pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key"); 158 else 159 pkey = load_key(infile, informat, 1, passin, e, "Private Key"); 160 161 if (pkey != NULL) { 162 dsa = EVP_PKEY_get1_DSA(pkey); 163 EVP_PKEY_free(pkey); 164 } 165 } 166 if (dsa == NULL) { 167 BIO_printf(bio_err, "unable to load Key\n"); 168 ERR_print_errors(bio_err); 169 goto end; 170 } 171 172 out = bio_open_owner(outfile, outformat, private); 173 if (out == NULL) 174 goto end; 175 176 if (text) { 177 assert(pubin || private); 178 if (!DSA_print(out, dsa, 0)) { 179 perror(outfile); 180 ERR_print_errors(bio_err); 181 goto end; 182 } 183 } 184 185 if (modulus) { 186 const BIGNUM *pub_key = NULL; 187 DSA_get0_key(dsa, &pub_key, NULL); 188 BIO_printf(out, "Public Key="); 189 BN_print(out, pub_key); 190 BIO_printf(out, "\n"); 191 } 192 193 if (noout) { 194 ret = 0; 195 goto end; 196 } 197 BIO_printf(bio_err, "writing DSA key\n"); 198 if (outformat == FORMAT_ASN1) { 199 if (pubin || pubout) { 200 i = i2d_DSA_PUBKEY_bio(out, dsa); 201 } else { 202 assert(private); 203 i = i2d_DSAPrivateKey_bio(out, dsa); 204 } 205 } else if (outformat == FORMAT_PEM) { 206 if (pubin || pubout) { 207 i = PEM_write_bio_DSA_PUBKEY(out, dsa); 208 } else { 209 assert(private); 210 i = PEM_write_bio_DSAPrivateKey(out, dsa, enc, 211 NULL, 0, NULL, passout); 212 } 213 #ifndef OPENSSL_NO_RSA 214 } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) { 215 EVP_PKEY *pk; 216 pk = EVP_PKEY_new(); 217 if (pk == NULL) 218 goto end; 219 220 EVP_PKEY_set1_DSA(pk, dsa); 221 if (outformat == FORMAT_PVK) { 222 if (pubin) { 223 BIO_printf(bio_err, "PVK form impossible with public key input\n"); 224 EVP_PKEY_free(pk); 225 goto end; 226 } 227 assert(private); 228 # ifdef OPENSSL_NO_RC4 229 BIO_printf(bio_err, "PVK format not supported\n"); 230 EVP_PKEY_free(pk); 231 goto end; 232 # else 233 i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout); 234 # endif 235 } else if (pubin || pubout) { 236 i = i2b_PublicKey_bio(out, pk); 237 } else { 238 assert(private); 239 i = i2b_PrivateKey_bio(out, pk); 240 } 241 EVP_PKEY_free(pk); 242 #endif 243 } else { 244 BIO_printf(bio_err, "bad output format specified for outfile\n"); 245 goto end; 246 } 247 if (i <= 0) { 248 BIO_printf(bio_err, "unable to write private key\n"); 249 ERR_print_errors(bio_err); 250 goto end; 251 } 252 ret = 0; 253 end: 254 BIO_free_all(out); 255 DSA_free(dsa); 256 release_engine(e); 257 OPENSSL_free(passin); 258 OPENSSL_free(passout); 259 return ret; 260 } 261