| /* |
| * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <limits.h> |
| #include "apps.h" |
| #include <openssl/bio.h> |
| #include <openssl/err.h> |
| #include <openssl/evp.h> |
| #include <openssl/objects.h> |
| #include <openssl/x509.h> |
| #include <openssl/rand.h> |
| #include <openssl/pem.h> |
| #ifndef OPENSSL_NO_COMP |
| # include <openssl/comp.h> |
| #endif |
| #include <ctype.h> |
| |
| #undef SIZE |
| #undef BSIZE |
| #define SIZE (512) |
| #define BSIZE (8*1024) |
| |
| static int set_hex(char *in, unsigned char *out, int size); |
| static void show_ciphers(const OBJ_NAME *name, void *bio_); |
| |
| typedef enum OPTION_choice { |
| OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, |
| OPT_LIST, |
| OPT_E, OPT_IN, OPT_OUT, OPT_PASS, OPT_ENGINE, OPT_D, OPT_P, OPT_V, |
| OPT_NOPAD, OPT_SALT, OPT_NOSALT, OPT_DEBUG, OPT_UPPER_P, OPT_UPPER_A, |
| OPT_A, OPT_Z, OPT_BUFSIZE, OPT_K, OPT_KFILE, OPT_UPPER_K, OPT_NONE, |
| OPT_UPPER_S, OPT_IV, OPT_MD, OPT_CIPHER |
| } OPTION_CHOICE; |
| |
| const OPTIONS enc_options[] = { |
| {"help", OPT_HELP, '-', "Display this summary"}, |
| {"ciphers", OPT_LIST, '-', "List ciphers"}, |
| {"in", OPT_IN, '<', "Input file"}, |
| {"out", OPT_OUT, '>', "Output file"}, |
| {"pass", OPT_PASS, 's', "Passphrase source"}, |
| {"e", OPT_E, '-', "Encrypt"}, |
| {"d", OPT_D, '-', "Decrypt"}, |
| {"p", OPT_P, '-', "Print the iv/key"}, |
| {"P", OPT_UPPER_P, '-', "Print the iv/key and exit"}, |
| {"v", OPT_V, '-', "Verbose output"}, |
| {"nopad", OPT_NOPAD, '-', "Disable standard block padding"}, |
| {"salt", OPT_SALT, '-', "Use salt in the KDF (default)"}, |
| {"nosalt", OPT_NOSALT, '-', "Do not use salt in the KDF"}, |
| {"debug", OPT_DEBUG, '-', "Print debug info"}, |
| {"a", OPT_A, '-', "Base64 encode/decode, depending on encryption flag"}, |
| {"base64", OPT_A, '-', "Same as option -a"}, |
| {"A", OPT_UPPER_A, '-', |
| "Used with -[base64|a] to specify base64 buffer as a single line"}, |
| {"bufsize", OPT_BUFSIZE, 's', "Buffer size"}, |
| {"k", OPT_K, 's', "Passphrase"}, |
| {"kfile", OPT_KFILE, '<', "Read passphrase from file"}, |
| {"K", OPT_UPPER_K, 's', "Raw key, in hex"}, |
| {"S", OPT_UPPER_S, 's', "Salt, in hex"}, |
| {"iv", OPT_IV, 's', "IV in hex"}, |
| {"md", OPT_MD, 's', "Use specified digest to create a key from the passphrase"}, |
| {"none", OPT_NONE, '-', "Don't encrypt"}, |
| {"", OPT_CIPHER, '-', "Any supported cipher"}, |
| #ifdef ZLIB |
| {"z", OPT_Z, '-', "Use zlib as the 'encryption'"}, |
| #endif |
| #ifndef OPENSSL_NO_ENGINE |
| {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, |
| #endif |
| {NULL} |
| }; |
| |
| int enc_main(int argc, char **argv) |
| { |
| static char buf[128]; |
| static const char magic[] = "Salted__"; |
| ENGINE *e = NULL; |
| BIO *in = NULL, *out = NULL, *b64 = NULL, *benc = NULL, *rbio = |
| NULL, *wbio = NULL; |
| EVP_CIPHER_CTX *ctx = NULL; |
| const EVP_CIPHER *cipher = NULL, *c; |
| const EVP_MD *dgst = NULL; |
| char *hkey = NULL, *hiv = NULL, *hsalt = NULL, *p; |
| char *infile = NULL, *outfile = NULL, *prog; |
| char *str = NULL, *passarg = NULL, *pass = NULL, *strbuf = NULL; |
| char mbuf[sizeof magic - 1]; |
| OPTION_CHOICE o; |
| int bsize = BSIZE, verbose = 0, debug = 0, olb64 = 0, nosalt = 0; |
| int enc = 1, printkey = 0, i, k; |
| int base64 = 0, informat = FORMAT_BINARY, outformat = FORMAT_BINARY; |
| int ret = 1, inl, nopad = 0; |
| unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; |
| unsigned char *buff = NULL, salt[PKCS5_SALT_LEN]; |
| long n; |
| #ifdef ZLIB |
| int do_zlib = 0; |
| BIO *bzl = NULL; |
| #endif |
| |
| /* first check the program name */ |
| prog = opt_progname(argv[0]); |
| if (strcmp(prog, "base64") == 0) |
| base64 = 1; |
| #ifdef ZLIB |
| else if (strcmp(prog, "zlib") == 0) |
| do_zlib = 1; |
| #endif |
| else { |
| cipher = EVP_get_cipherbyname(prog); |
| if (cipher == NULL && strcmp(prog, "enc") != 0) { |
| BIO_printf(bio_err, "%s is not a known cipher\n", prog); |
| goto end; |
| } |
| } |
| |
| prog = opt_init(argc, argv, enc_options); |
| while ((o = opt_next()) != OPT_EOF) { |
| switch (o) { |
| case OPT_EOF: |
| case OPT_ERR: |
| opthelp: |
| BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| goto end; |
| case OPT_HELP: |
| opt_help(enc_options); |
| ret = 0; |
| goto end; |
| case OPT_LIST: |
| BIO_printf(bio_out, "Supported ciphers:\n"); |
| OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, |
| show_ciphers, bio_out); |
| BIO_printf(bio_out, "\n"); |
| ret = 0; |
| goto end; |
| case OPT_E: |
| enc = 1; |
| break; |
| case OPT_IN: |
| infile = opt_arg(); |
| break; |
| case OPT_OUT: |
| outfile = opt_arg(); |
| break; |
| case OPT_PASS: |
| passarg = opt_arg(); |
| break; |
| case OPT_ENGINE: |
| e = setup_engine(opt_arg(), 0); |
| break; |
| case OPT_D: |
| enc = 0; |
| break; |
| case OPT_P: |
| printkey = 1; |
| break; |
| case OPT_V: |
| verbose = 1; |
| break; |
| case OPT_NOPAD: |
| nopad = 1; |
| break; |
| case OPT_SALT: |
| nosalt = 0; |
| break; |
| case OPT_NOSALT: |
| nosalt = 1; |
| break; |
| case OPT_DEBUG: |
| debug = 1; |
| break; |
| case OPT_UPPER_P: |
| printkey = 2; |
| break; |
| case OPT_UPPER_A: |
| olb64 = 1; |
| break; |
| case OPT_A: |
| base64 = 1; |
| break; |
| case OPT_Z: |
| #ifdef ZLIB |
| do_zlib = 1; |
| #endif |
| break; |
| case OPT_BUFSIZE: |
| p = opt_arg(); |
| i = (int)strlen(p) - 1; |
| k = i >= 1 && p[i] == 'k'; |
| if (k) |
| p[i] = '\0'; |
| if (!opt_long(opt_arg(), &n) |
| || n < 0 || (k && n >= LONG_MAX / 1024)) |
| goto opthelp; |
| if (k) |
| n *= 1024; |
| bsize = (int)n; |
| break; |
| case OPT_K: |
| str = opt_arg(); |
| break; |
| case OPT_KFILE: |
| in = bio_open_default(opt_arg(), 'r', FORMAT_TEXT); |
| if (in == NULL) |
| goto opthelp; |
| i = BIO_gets(in, buf, sizeof buf); |
| BIO_free(in); |
| in = NULL; |
| if (i <= 0) { |
| BIO_printf(bio_err, |
| "%s Can't read key from %s\n", prog, opt_arg()); |
| goto opthelp; |
| } |
| while (--i > 0 && (buf[i] == '\r' || buf[i] == '\n')) |
| buf[i] = '\0'; |
| if (i <= 0) { |
| BIO_printf(bio_err, "%s: zero length password\n", prog); |
| goto opthelp; |
| } |
| str = buf; |
| break; |
| case OPT_UPPER_K: |
| hkey = opt_arg(); |
| break; |
| case OPT_UPPER_S: |
| hsalt = opt_arg(); |
| break; |
| case OPT_IV: |
| hiv = opt_arg(); |
| break; |
| case OPT_MD: |
| if (!opt_md(opt_arg(), &dgst)) |
| goto opthelp; |
| break; |
| case OPT_CIPHER: |
| if (!opt_cipher(opt_unknown(), &c)) |
| goto opthelp; |
| cipher = c; |
| break; |
| case OPT_NONE: |
| cipher = NULL; |
| break; |
| } |
| } |
| |
| if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) { |
| BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog); |
| goto end; |
| } |
| |
| if (cipher && (EVP_CIPHER_mode(cipher) == EVP_CIPH_XTS_MODE)) { |
| BIO_printf(bio_err, "%s XTS ciphers not supported\n", prog); |
| goto end; |
| } |
| |
| if (dgst == NULL) |
| dgst = EVP_sha256(); |
| |
| /* It must be large enough for a base64 encoded line */ |
| if (base64 && bsize < 80) |
| bsize = 80; |
| if (verbose) |
| BIO_printf(bio_err, "bufsize=%d\n", bsize); |
| |
| #ifdef ZLIB |
| if (!do_zlib) |
| #endif |
| if (base64) { |
| if (enc) |
| outformat = FORMAT_BASE64; |
| else |
| informat = FORMAT_BASE64; |
| } |
| |
| strbuf = app_malloc(SIZE, "strbuf"); |
| buff = app_malloc(EVP_ENCODE_LENGTH(bsize), "evp buffer"); |
| |
| if (infile == NULL) { |
| unbuffer(stdin); |
| in = dup_bio_in(informat); |
| } else |
| in = bio_open_default(infile, 'r', informat); |
| if (in == NULL) |
| goto end; |
| |
| if (!str && passarg) { |
| if (!app_passwd(passarg, NULL, &pass, NULL)) { |
| BIO_printf(bio_err, "Error getting password\n"); |
| goto end; |
| } |
| str = pass; |
| } |
| |
| if ((str == NULL) && (cipher != NULL) && (hkey == NULL)) { |
| if (1) { |
| #ifndef OPENSSL_NO_UI |
| for (;;) { |
| char prompt[200]; |
| |
| BIO_snprintf(prompt, sizeof prompt, "enter %s %s password:", |
| OBJ_nid2ln(EVP_CIPHER_nid(cipher)), |
| (enc) ? "encryption" : "decryption"); |
| strbuf[0] = '\0'; |
| i = EVP_read_pw_string((char *)strbuf, SIZE, prompt, enc); |
| if (i == 0) { |
| if (strbuf[0] == '\0') { |
| ret = 1; |
| goto end; |
| } |
| str = strbuf; |
| break; |
| } |
| if (i < 0) { |
| BIO_printf(bio_err, "bad password read\n"); |
| goto end; |
| } |
| } |
| } else { |
| #endif |
| BIO_printf(bio_err, "password required\n"); |
| goto end; |
| } |
| } |
| |
| out = bio_open_default(outfile, 'w', outformat); |
| if (out == NULL) |
| goto end; |
| |
| if (debug) { |
| BIO_set_callback(in, BIO_debug_callback); |
| BIO_set_callback(out, BIO_debug_callback); |
| BIO_set_callback_arg(in, (char *)bio_err); |
| BIO_set_callback_arg(out, (char *)bio_err); |
| } |
| |
| rbio = in; |
| wbio = out; |
| |
| #ifdef ZLIB |
| if (do_zlib) { |
| if ((bzl = BIO_new(BIO_f_zlib())) == NULL) |
| goto end; |
| if (debug) { |
| BIO_set_callback(bzl, BIO_debug_callback); |
| BIO_set_callback_arg(bzl, (char *)bio_err); |
| } |
| if (enc) |
| wbio = BIO_push(bzl, wbio); |
| else |
| rbio = BIO_push(bzl, rbio); |
| } |
| #endif |
| |
| if (base64) { |
| if ((b64 = BIO_new(BIO_f_base64())) == NULL) |
| goto end; |
| if (debug) { |
| BIO_set_callback(b64, BIO_debug_callback); |
| BIO_set_callback_arg(b64, (char *)bio_err); |
| } |
| if (olb64) |
| BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL); |
| if (enc) |
| wbio = BIO_push(b64, wbio); |
| else |
| rbio = BIO_push(b64, rbio); |
| } |
| |
| if (cipher != NULL) { |
| /* |
| * Note that str is NULL if a key was passed on the command line, so |
| * we get no salt in that case. Is this a bug? |
| */ |
| if (str != NULL) { |
| /* |
| * Salt handling: if encrypting generate a salt and write to |
| * output BIO. If decrypting read salt from input BIO. |
| */ |
| unsigned char *sptr; |
| size_t str_len = strlen(str); |
| |
| if (nosalt) |
| sptr = NULL; |
| else { |
| if (enc) { |
| if (hsalt) { |
| if (!set_hex(hsalt, salt, sizeof salt)) { |
| BIO_printf(bio_err, "invalid hex salt value\n"); |
| goto end; |
| } |
| } else if (RAND_bytes(salt, sizeof salt) <= 0) |
| goto end; |
| /* |
| * If -P option then don't bother writing |
| */ |
| if ((printkey != 2) |
| && (BIO_write(wbio, magic, |
| sizeof magic - 1) != sizeof magic - 1 |
| || BIO_write(wbio, |
| (char *)salt, |
| sizeof salt) != sizeof salt)) { |
| BIO_printf(bio_err, "error writing output file\n"); |
| goto end; |
| } |
| } else if (BIO_read(rbio, mbuf, sizeof mbuf) != sizeof mbuf |
| || BIO_read(rbio, |
| (unsigned char *)salt, |
| sizeof salt) != sizeof salt) { |
| BIO_printf(bio_err, "error reading input file\n"); |
| goto end; |
| } else if (memcmp(mbuf, magic, sizeof magic - 1)) { |
| BIO_printf(bio_err, "bad magic number\n"); |
| goto end; |
| } |
| |
| sptr = salt; |
| } |
| |
| 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 bug picked up by Larry J. Hughes Jr. <hughes@indiana.edu> |
| */ |
| if (str == strbuf) |
| OPENSSL_cleanse(str, SIZE); |
| else |
| OPENSSL_cleanse(str, str_len); |
| } |
| if (hiv != NULL) { |
| int siz = EVP_CIPHER_iv_length(cipher); |
| if (siz == 0) { |
| BIO_printf(bio_err, "warning: iv not use by this cipher\n"); |
| } else if (!set_hex(hiv, iv, sizeof iv)) { |
| BIO_printf(bio_err, "invalid hex iv value\n"); |
| goto end; |
| } |
| } |
| if ((hiv == NULL) && (str == NULL) |
| && EVP_CIPHER_iv_length(cipher) != 0) { |
| /* |
| * No IV was explicitly set and no IV was generated during |
| * EVP_BytesToKey. Hence the IV is undefined, making correct |
| * decryption impossible. |
| */ |
| BIO_printf(bio_err, "iv undefined\n"); |
| goto end; |
| } |
| if ((hkey != NULL) && !set_hex(hkey, key, EVP_CIPHER_key_length(cipher))) { |
| BIO_printf(bio_err, "invalid hex key value\n"); |
| goto end; |
| } |
| |
| 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, NULL, NULL, NULL, enc)) { |
| BIO_printf(bio_err, "Error setting cipher %s\n", |
| EVP_CIPHER_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_name(cipher)); |
| ERR_print_errors(bio_err); |
| goto end; |
| } |
| |
| if (debug) { |
| BIO_set_callback(benc, BIO_debug_callback); |
| 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_key_length(cipher) > 0) { |
| printf("key="); |
| for (i = 0; i < EVP_CIPHER_key_length(cipher); i++) |
| printf("%02X", key[i]); |
| printf("\n"); |
| } |
| if (EVP_CIPHER_iv_length(cipher) > 0) { |
| printf("iv ="); |
| for (i = 0; i < EVP_CIPHER_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); |
| |
| for (;;) { |
| 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 :%8"PRIu64"\n", BIO_number_read(in)); |
| BIO_printf(bio_err, "bytes written:%8"PRIu64"\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); |
| #ifdef ZLIB |
| BIO_free(bzl); |
| #endif |
| release_engine(e); |
| OPENSSL_free(pass); |
| return (ret); |
| } |
| |
| static void show_ciphers(const OBJ_NAME *name, void *bio_) |
| { |
| BIO *bio = bio_; |
| static int n; |
| |
| if (!islower((unsigned char)*name->name)) |
| return; |
| |
| BIO_printf(bio, "-%-25s", name->name); |
| if (++n == 3) { |
| BIO_printf(bio, "\n"); |
| n = 0; |
| } else |
| BIO_printf(bio, " "); |
| } |
| |
| static int set_hex(char *in, unsigned char *out, int size) |
| { |
| int i, n; |
| unsigned char j; |
| |
| n = strlen(in); |
| if (n > (size * 2)) { |
| BIO_printf(bio_err, "hex string is too long\n"); |
| return (0); |
| } |
| memset(out, 0, size); |
| for (i = 0; i < n; i++) { |
| j = (unsigned char)*in; |
| *(in++) = '\0'; |
| if (j == 0) |
| break; |
| 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); |
| } |
