mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
f7d2427ac3
Reviewed-by: Tomas Mraz <tomas@openssl.org> (Merged from https://github.com/openssl/openssl/pull/15747)
697 lines
21 KiB
C
697 lines
21 KiB
C
/*
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* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include "apps.h"
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#include "progs.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include <openssl/rand.h>
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#include <openssl/pem.h>
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#ifndef OPENSSL_NO_COMP
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# include <openssl/comp.h>
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#endif
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#include <ctype.h>
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#undef SIZE
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#undef BSIZE
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#define SIZE (512)
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#define BSIZE (8*1024)
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static int set_hex(const char *in, unsigned char *out, int size);
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static void show_ciphers(const OBJ_NAME *name, void *bio_);
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struct doall_enc_ciphers {
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BIO *bio;
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int n;
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};
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typedef enum OPTION_choice {
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OPT_COMMON,
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OPT_LIST,
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OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V,
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OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A,
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OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE,
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OPT_UPPER_S, OPT_IV, OPT_MD, OPT_ITER, OPT_PBKDF2, OPT_CIPHER,
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OPT_R_ENUM, OPT_PROV_ENUM
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} OPTION_CHOICE;
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const OPTIONS enc_options[] = {
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OPT_SECTION("General"),
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{"help", OPT_HELP, '-', "Display this summary"},
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{"list", OPT_LIST, '-', "List ciphers"},
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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{"ciphers", OPT_LIST, '-', "Alias for -list"},
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#endif
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{"e", OPT_E, '-', "Encrypt"},
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{"d", OPT_D, '-', "Decrypt"},
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{"p", OPT_P, '-', "Print the iv/key"},
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{"P", OPT_UPPER_P, '-', "Print the iv/key and exit"},
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#ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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#endif
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OPT_SECTION("Input"),
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{"in", OPT_IN, '<', "Input file"},
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{"k", OPT_K, 's', "Passphrase"},
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{"kfile", OPT_KFILE, '<', "Read passphrase from file"},
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OPT_SECTION("Output"),
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{"out", OPT_OUT, '>', "Output file"},
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{"pass", OPT_PASS, 's', "Passphrase source"},
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{"v", OPT_V, '-', "Verbose output"},
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{"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"},
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{"base64", OPT_A, '-', "Same as option -a"},
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{"A", OPT_UPPER_A, '-',
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"Used with -[base64|a] to specify base64 buffer as a single line"},
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OPT_SECTION("Encryption"),
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{"nopad", OPT_NOPAD, '-', "Disable standard block padding"},
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{"salt", OPT_SALT, '-', "Use salt in the KDF (default)"},
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{"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"},
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{"debug", OPT_DEBUG, '-', "Print debug info"},
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{"bufsize", OPT_BUFSIZE, 's', "Buffer size"},
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{"K", OPT_UPPER_K, 's', "Raw key, in hex"},
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{"S", OPT_UPPER_S, 's', "Salt, in hex"},
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{"iv", OPT_IV, 's', "IV in hex"},
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{"md", OPT_MD, 's', "Use specified digest to create a key from the passphrase"},
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{"iter", OPT_ITER, 'p', "Specify the iteration count and force use of PBKDF2"},
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{"pbkdf2", OPT_PBKDF2, '-', "Use password-based key derivation function 2"},
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{"none", OPT_NONE, '-', "Don't encrypt"},
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#ifdef ZLIB
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{"z", OPT_Z, '-', "Compress or decompress encrypted data using zlib"},
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#endif
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{"", OPT_CIPHER, '-', "Any supported cipher"},
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OPT_R_OPTIONS,
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OPT_PROV_OPTIONS,
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{NULL}
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};
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int enc_main(int argc, char **argv)
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{
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static char buf[128];
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static const char magic[] = "Salted__";
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ENGINE *e = NULL;
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BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio =
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NULL, *wbio = NULL;
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EVP_CIPHER_CTX *ctx = NULL;
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EVP_CIPHER *cipher = NULL;
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EVP_MD *dgst = NULL;
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const char *digestname = NULL;
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char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p;
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char *infile = NULL, *outfile = NULL, *prog;
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char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL;
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const char *ciphername = NULL;
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char mbuf[sizeof(magic) - 1];
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OPTION_CHOICE o;
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int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0;
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int enc = 1, printkey = 0, i, k;
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int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY;
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int ret = 1, inl, nopad = 0;
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unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
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unsigned char *buff = NULL, salt[PKCS5_SALT_LEN];
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int pbkdf2 = 0;
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int iter = 0;
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long n;
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struct doall_enc_ciphers dec;
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#ifdef ZLIB
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int do_zlib = 0;
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BIO *bzl = NULL;
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#endif
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/* first check the command name */
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if (strcmp(argv[0], "base64") == 0)
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base64 = 1;
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#ifdef ZLIB
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else if (strcmp(argv[0], "zlib") == 0)
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do_zlib = 1;
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#endif
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else if (strcmp(argv[0], "enc") != 0)
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ciphername = argv[0];
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prog = opt_init(argc, argv, enc_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(enc_options);
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ret = 0;
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goto end;
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case OPT_LIST:
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BIO_printf(bio_out, "Supported ciphers:\n");
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dec.bio = bio_out;
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dec.n = 0;
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OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH,
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show_ciphers, &dec);
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BIO_printf(bio_out, "\n");
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ret = 0;
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goto end;
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case OPT_E:
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enc = 1;
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break;
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case OPT_IN:
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infile = opt_arg();
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break;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_PASS:
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passarg = opt_arg();
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break;
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case OPT_ENGINE:
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e = setup_engine(opt_arg(), 0);
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break;
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case OPT_D:
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enc = 0;
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break;
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case OPT_P:
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printkey = 1;
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break;
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case OPT_V:
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verbose = 1;
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break;
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case OPT_NOPAD:
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nopad = 1;
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break;
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case OPT_SALT:
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nosalt = 0;
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break;
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case OPT_NOSALT:
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nosalt = 1;
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break;
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case OPT_DEBUG:
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debug = 1;
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break;
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case OPT_UPPER_P:
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printkey = 2;
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break;
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case OPT_UPPER_A:
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olb64 = 1;
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break;
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case OPT_A:
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base64 = 1;
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break;
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case OPT_Z:
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#ifdef ZLIB
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do_zlib = 1;
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#endif
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break;
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case OPT_BUFSIZE:
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p = opt_arg();
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i = (int)strlen(p) - 1;
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k = i >= 1 && p[i] == 'k';
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if (k)
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p[i] = '\0';
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if (!opt_long(opt_arg(), &n)
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|| n < 0 || (k && n >= LONG_MAX / 1024))
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goto opthelp;
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if (k)
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n *= 1024;
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bsize = (int)n;
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break;
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case OPT_K:
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str = opt_arg();
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break;
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case OPT_KFILE:
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in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT);
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if (in == NULL)
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goto opthelp;
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i = BIO_gets(in, buf, sizeof(buf));
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BIO_free(in);
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in = NULL;
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if (i <= 0) {
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BIO_printf(bio_err,
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"%s Can't read key from %s\n", prog, opt_arg());
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goto opthelp;
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}
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while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n'))
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buf[i] = '\0';
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if (i <= 0) {
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BIO_printf(bio_err, "%s: zero length password\n", prog);
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goto opthelp;
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}
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str = buf;
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break;
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case OPT_UPPER_K:
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hkey = opt_arg();
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break;
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case OPT_UPPER_S:
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hsalt = opt_arg();
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break;
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case OPT_IV:
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hiv = opt_arg();
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break;
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case OPT_MD:
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digestname = opt_arg();
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break;
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case OPT_CIPHER:
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ciphername = opt_unknown();
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break;
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case OPT_ITER:
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iter = opt_int_arg();
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pbkdf2 = 1;
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break;
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case OPT_PBKDF2:
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pbkdf2 = 1;
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if (iter == 0) /* do not overwrite a chosen value */
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iter = 10000;
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break;
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case OPT_NONE:
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cipher = NULL;
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break;
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case OPT_R_CASES:
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if (!opt_rand(o))
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goto end;
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break;
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case OPT_PROV_CASES:
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if (!opt_provider(o))
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goto end;
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break;
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}
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}
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/* No extra arguments. */
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argc = opt_num_rest();
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if (argc != 0)
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goto opthelp;
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if (!app_RAND_load())
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goto end;
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/* Get the cipher name, either from progname (if set) or flag. */
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if (ciphername != NULL) {
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if (!opt_cipher(ciphername, &cipher))
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goto opthelp;
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}
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if (digestname != NULL) {
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if (!opt_md(digestname, &dgst))
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goto opthelp;
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}
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if (dgst == NULL)
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dgst = (EVP_MD *)EVP_sha256();
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if (iter == 0)
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iter = 1;
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/* It must be large enough for a base64 encoded line */
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if (base64 && bsize < 80)
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bsize = 80;
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if (verbose)
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BIO_printf(bio_err, "bufsize=%d\n", bsize);
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#ifdef ZLIB
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if (!do_zlib)
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#endif
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if (base64) {
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if (enc)
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outformat = FORMAT_BASE64;
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else
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informat = FORMAT_BASE64;
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}
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strbuf = app_malloc(SIZE, "strbuf");
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buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer");
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if (infile == NULL) {
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in = dup_bio_in(informat);
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} else {
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in = bio_open_default(infile, 'r', informat);
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}
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if (in == NULL)
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goto end;
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if (str == NULL && passarg != NULL) {
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if (!app_passwd(passarg, NULL, &pass, NULL)) {
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BIO_printf(bio_err, "Error getting password\n");
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goto end;
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}
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str = pass;
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}
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if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) {
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if (1) {
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#ifndef OPENSSL_NO_UI_CONSOLE
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for (;;) {
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char prompt[200];
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BIO_snprintf(prompt, sizeof(prompt), "enter %s %s password:",
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EVP_CIPHER_get0_name(cipher),
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(enc) ? "encryption" : "decryption");
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strbuf[0] = '\0';
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i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc);
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if (i == 0) {
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if (strbuf[0] == '\0') {
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ret = 1;
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goto end;
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}
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str = strbuf;
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break;
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}
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if (i < 0) {
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BIO_printf(bio_err, "bad password read\n");
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goto end;
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}
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}
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} else {
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#endif
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BIO_printf(bio_err, "password required\n");
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goto end;
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}
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}
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out = bio_open_default(outfile, 'w', outformat);
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if (out == NULL)
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goto end;
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if (debug) {
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BIO_set_callback_ex(in, BIO_debug_callback_ex);
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BIO_set_callback_ex(out, BIO_debug_callback_ex);
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BIO_set_callback_arg(in, (char *)bio_err);
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BIO_set_callback_arg(out, (char *)bio_err);
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}
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rbio = in;
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wbio = out;
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#ifdef ZLIB
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if (do_zlib) {
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if ((bzl = BIO_new(BIO_f_zlib())) == NULL)
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goto end;
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if (debug) {
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BIO_set_callback_ex(bzl, BIO_debug_callback_ex);
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BIO_set_callback_arg(bzl, (char *)bio_err);
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}
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if (enc)
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wbio = BIO_push(bzl, wbio);
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else
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rbio = BIO_push(bzl, rbio);
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}
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#endif
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if (base64) {
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if ((b64 = BIO_new(BIO_f_base64())) == NULL)
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goto end;
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if (debug) {
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BIO_set_callback_ex(b64, BIO_debug_callback_ex);
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BIO_set_callback_arg(b64, (char *)bio_err);
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}
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if (olb64)
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BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
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if (enc)
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wbio = BIO_push(b64, wbio);
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else
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rbio = BIO_push(b64, rbio);
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}
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if (cipher != NULL) {
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if (str != NULL) { /* a passphrase is available */
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/*
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* Salt handling: if encrypting generate a salt if not supplied,
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* and write to output BIO. If decrypting use salt from input BIO
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* if not given with args
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*/
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unsigned char *sptr;
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size_t str_len = strlen(str);
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if (nosalt) {
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sptr = NULL;
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} else {
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if (hsalt != NULL && !set_hex(hsalt, salt, sizeof(salt))) {
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BIO_printf(bio_err, "invalid hex salt value\n");
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goto end;
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}
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if (enc) { /* encryption */
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if (hsalt == NULL) {
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if (RAND_bytes(salt, sizeof(salt)) <= 0) {
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BIO_printf(bio_err, "RAND_bytes failed\n");
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goto end;
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}
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/*
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* If -P option then don't bother writing.
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* If salt is given, shouldn't either ?
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*/
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if ((printkey != 2)
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&& (BIO_write(wbio, magic,
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sizeof(magic) - 1) != sizeof(magic) - 1
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|| BIO_write(wbio,
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(char *)salt,
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sizeof(salt)) != sizeof(salt))) {
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BIO_printf(bio_err, "error writing output file\n");
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goto end;
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}
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}
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} else { /* decryption */
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if (hsalt == NULL) {
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if (BIO_read(rbio, mbuf, sizeof(mbuf)) != sizeof(mbuf)) {
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BIO_printf(bio_err, "error reading input file\n");
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goto end;
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}
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if (memcmp(mbuf, magic, sizeof(mbuf)) == 0) { /* file IS salted */
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if (BIO_read(rbio, salt,
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sizeof(salt)) != sizeof(salt)) {
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BIO_printf(bio_err, "error reading input file\n");
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goto end;
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}
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} else { /* file is NOT salted, NO salt available */
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BIO_printf(bio_err, "bad magic number\n");
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goto end;
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}
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}
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}
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sptr = salt;
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}
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if (pbkdf2 == 1) {
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/*
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* derive key and default iv
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* concatenated into a temporary buffer
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*/
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unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH];
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int iklen = EVP_CIPHER_get_key_length(cipher);
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int ivlen = EVP_CIPHER_get_iv_length(cipher);
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/* not needed if HASH_UPDATE() is fixed : */
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int islen = (sptr != NULL ? sizeof(salt) : 0);
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if (!PKCS5_PBKDF2_HMAC(str, str_len, sptr, islen,
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iter, dgst, iklen+ivlen, tmpkeyiv)) {
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BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n");
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goto end;
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}
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/* split and move data back to global buffer */
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memcpy(key, tmpkeyiv, iklen);
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memcpy(iv, tmpkeyiv+iklen, ivlen);
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} else {
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BIO_printf(bio_err, "*** WARNING : "
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"deprecated key derivation used.\n"
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"Using -iter or -pbkdf2 would be better.\n");
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if (!EVP_BytesToKey(cipher, dgst, sptr,
|
|
(unsigned char *)str, str_len,
|
|
1, key, iv)) {
|
|
BIO_printf(bio_err, "EVP_BytesToKey failed\n");
|
|
goto end;
|
|
}
|
|
}
|
|
/*
|
|
* zero the complete buffer or the string passed from the command
|
|
* line.
|
|
*/
|
|
if (str == strbuf)
|
|
OPENSSL_cleanse(str, SIZE);
|
|
else
|
|
OPENSSL_cleanse(str, str_len);
|
|
}
|
|
if (hiv != NULL) {
|
|
int siz = EVP_CIPHER_get_iv_length(cipher);
|
|
if (siz == 0) {
|
|
BIO_printf(bio_err, "warning: iv not used by this cipher\n");
|
|
} else if (!set_hex(hiv, iv, siz)) {
|
|
BIO_printf(bio_err, "invalid hex iv value\n");
|
|
goto end;
|
|
}
|
|
}
|
|
if ((hiv == NULL) && (str == NULL)
|
|
&& EVP_CIPHER_get_iv_length(cipher) != 0) {
|
|
/*
|
|
* No IV was explicitly set and no IV was generated.
|
|
* Hence the IV is undefined, making correct decryption impossible.
|
|
*/
|
|
BIO_printf(bio_err, "iv undefined\n");
|
|
goto end;
|
|
}
|
|
if (hkey != NULL) {
|
|
if (!set_hex(hkey, key, EVP_CIPHER_get_key_length(cipher))) {
|
|
BIO_printf(bio_err, "invalid hex key value\n");
|
|
goto end;
|
|
}
|
|
/* wiping secret data as we no longer need it */
|
|
cleanse(hkey);
|
|
}
|
|
|
|
if ((benc = BIO_new(BIO_f_cipher())) == NULL)
|
|
goto end;
|
|
|
|
/*
|
|
* Since we may be changing parameters work on the encryption context
|
|
* rather than calling BIO_set_cipher().
|
|
*/
|
|
|
|
BIO_get_cipher_ctx(benc, &ctx);
|
|
|
|
if (!EVP_CipherInit_ex(ctx, cipher, e, NULL, NULL, enc)) {
|
|
BIO_printf(bio_err, "Error setting cipher %s\n",
|
|
EVP_CIPHER_get0_name(cipher));
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
|
|
if (nopad)
|
|
EVP_CIPHER_CTX_set_padding(ctx, 0);
|
|
|
|
if (!EVP_CipherInit_ex(ctx, NULL, NULL, key, iv, enc)) {
|
|
BIO_printf(bio_err, "Error setting cipher %s\n",
|
|
EVP_CIPHER_get0_name(cipher));
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
|
|
if (debug) {
|
|
BIO_set_callback_ex(benc, BIO_debug_callback_ex);
|
|
BIO_set_callback_arg(benc, (char *)bio_err);
|
|
}
|
|
|
|
if (printkey) {
|
|
if (!nosalt) {
|
|
printf("salt=");
|
|
for (i = 0; i < (int)sizeof(salt); i++)
|
|
printf("%02X", salt[i]);
|
|
printf("\n");
|
|
}
|
|
if (EVP_CIPHER_get_key_length(cipher) > 0) {
|
|
printf("key=");
|
|
for (i = 0; i < EVP_CIPHER_get_key_length(cipher); i++)
|
|
printf("%02X", key[i]);
|
|
printf("\n");
|
|
}
|
|
if (EVP_CIPHER_get_iv_length(cipher) > 0) {
|
|
printf("iv =");
|
|
for (i = 0; i < EVP_CIPHER_get_iv_length(cipher); i++)
|
|
printf("%02X", iv[i]);
|
|
printf("\n");
|
|
}
|
|
if (printkey == 2) {
|
|
ret = 0;
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Only encrypt/decrypt as we write the file */
|
|
if (benc != NULL)
|
|
wbio = BIO_push(benc, wbio);
|
|
|
|
while (BIO_pending(rbio) || !BIO_eof(rbio)) {
|
|
inl = BIO_read(rbio, (char *)buff, bsize);
|
|
if (inl <= 0)
|
|
break;
|
|
if (BIO_write(wbio, (char *)buff, inl) != inl) {
|
|
BIO_printf(bio_err, "error writing output file\n");
|
|
goto end;
|
|
}
|
|
}
|
|
if (!BIO_flush(wbio)) {
|
|
BIO_printf(bio_err, "bad decrypt\n");
|
|
goto end;
|
|
}
|
|
|
|
ret = 0;
|
|
if (verbose) {
|
|
BIO_printf(bio_err, "bytes read : %8ju\n", BIO_number_read(in));
|
|
BIO_printf(bio_err, "bytes written: %8ju\n", BIO_number_written(out));
|
|
}
|
|
end:
|
|
ERR_print_errors(bio_err);
|
|
OPENSSL_free(strbuf);
|
|
OPENSSL_free(buff);
|
|
BIO_free(in);
|
|
BIO_free_all(out);
|
|
BIO_free(benc);
|
|
BIO_free(b64);
|
|
EVP_MD_free(dgst);
|
|
EVP_CIPHER_free(cipher);
|
|
#ifdef ZLIB
|
|
BIO_free(bzl);
|
|
#endif
|
|
release_engine(e);
|
|
OPENSSL_free(pass);
|
|
return ret;
|
|
}
|
|
|
|
static void show_ciphers(const OBJ_NAME *name, void *arg)
|
|
{
|
|
struct doall_enc_ciphers *dec = (struct doall_enc_ciphers *)arg;
|
|
const EVP_CIPHER *cipher;
|
|
|
|
if (!islower((unsigned char)*name->name))
|
|
return;
|
|
|
|
/* Filter out ciphers that we cannot use */
|
|
cipher = EVP_get_cipherbyname(name->name);
|
|
if (cipher == NULL
|
|
|| (EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0
|
|
|| EVP_CIPHER_get_mode(cipher) == EVP_CIPH_XTS_MODE)
|
|
return;
|
|
|
|
BIO_printf(dec->bio, "-%-25s", name->name);
|
|
if (++dec->n == 3) {
|
|
BIO_printf(dec->bio, "\n");
|
|
dec->n = 0;
|
|
} else
|
|
BIO_printf(dec->bio, " ");
|
|
}
|
|
|
|
static int set_hex(const char *in, unsigned char *out, int size)
|
|
{
|
|
int i, n;
|
|
unsigned char j;
|
|
|
|
i = size * 2;
|
|
n = strlen(in);
|
|
if (n > i) {
|
|
BIO_printf(bio_err, "hex string is too long, ignoring excess\n");
|
|
n = i; /* ignore exceeding part */
|
|
} else if (n < i) {
|
|
BIO_printf(bio_err, "hex string is too short, padding with zero bytes to length\n");
|
|
}
|
|
|
|
memset(out, 0, size);
|
|
for (i = 0; i < n; i++) {
|
|
j = (unsigned char)*in++;
|
|
if (!isxdigit(j)) {
|
|
BIO_printf(bio_err, "non-hex digit\n");
|
|
return 0;
|
|
}
|
|
j = (unsigned char)OPENSSL_hexchar2int(j);
|
|
if (i & 1)
|
|
out[i / 2] |= j;
|
|
else
|
|
out[i / 2] = (j << 4);
|
|
}
|
|
return 1;
|
|
}
|