path: root/contrib/libs/openssl/apps/enc.c

/* 
 * Copyright 1995-2021 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 "progs.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(const char *in, unsigned char *out, int size); 
static void show_ciphers(const OBJ_NAME *name, void *bio_); 
 
struct doall_enc_ciphers { 
    BIO *bio; 
    int n; 
}; 
 
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_ITER, OPT_PBKDF2, OPT_CIPHER, 
    OPT_R_ENUM 
} OPTION_CHOICE; 
 
const OPTIONS enc_options[] = { 
    {"help", OPT_HELP, '-', "Display this summary"}, 
    {"list", OPT_LIST, '-', "List ciphers"},
    {"ciphers", OPT_LIST, '-', "Alias for -list"},
    {"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"}, 
    {"iter", OPT_ITER, 'p', "Specify the iteration count and force use of PBKDF2"}, 
    {"pbkdf2", OPT_PBKDF2, '-', "Use password-based key derivation function 2"}, 
    {"none", OPT_NONE, '-', "Don't encrypt"}, 
    {"", OPT_CIPHER, '-', "Any supported cipher"}, 
    OPT_R_OPTIONS, 
#ifdef ZLIB 
    {"z", OPT_Z, '-', "Compress or decompress encrypted data using zlib"},
#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]; 
    int pbkdf2 = 0; 
    int iter = 0; 
    long n; 
    struct doall_enc_ciphers dec; 
#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"); 
            dec.bio = bio_out; 
            dec.n = 0; 
            OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, 
                                   show_ciphers, &dec); 
            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_ITER: 
            if (!opt_int(opt_arg(), &iter)) 
                goto opthelp; 
            pbkdf2 = 1; 
            break; 
        case OPT_PBKDF2: 
            pbkdf2 = 1; 
            if (iter == 0)    /* do not overwrite a chosen value */ 
                iter = 10000; 
            break; 
        case OPT_NONE: 
            cipher = NULL; 
            break; 
        case OPT_R_CASES: 
            if (!opt_rand(o)) 
                goto end; 
            break; 
        } 
    } 
    if (opt_num_rest() != 0) { 
        BIO_printf(bio_err, "Extra arguments given.\n"); 
        goto opthelp; 
    } 
 
    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(); 
 
    if (iter == 0) 
        iter = 1; 
 
    /* 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) { 
        in = dup_bio_in(informat); 
    } else { 
        in = bio_open_default(infile, 'r', informat); 
    } 
    if (in == NULL) 
        goto end; 
 
    if (str == NULL && passarg != NULL) { 
        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_CONSOLE 
            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 (pbkdf2 == 1) { 
                /* 
                * derive key and default iv 
                * concatenated into a temporary buffer 
                */ 
                unsigned char tmpkeyiv[EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH]; 
                int iklen = EVP_CIPHER_key_length(cipher); 
                int ivlen = EVP_CIPHER_iv_length(cipher); 
                /* not needed if HASH_UPDATE() is fixed : */ 
                int islen = (sptr != NULL ? sizeof(salt) : 0); 
                if (!PKCS5_PBKDF2_HMAC(str, str_len, sptr, islen, 
                                       iter, dgst, iklen+ivlen, tmpkeyiv)) { 
                    BIO_printf(bio_err, "PKCS5_PBKDF2_HMAC failed\n"); 
                    goto end; 
                } 
                /* split and move data back to global buffer */ 
                memcpy(key, tmpkeyiv, iklen); 
                memcpy(iv, tmpkeyiv+iklen, ivlen); 
            } else { 
                BIO_printf(bio_err, "*** WARNING : " 
                                    "deprecated key derivation used.\n" 
                                    "Using -iter or -pbkdf2 would be better.\n"); 
                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_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_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_key_length(cipher))) { 
                BIO_printf(bio_err, "invalid hex key value\n"); 
                goto end; 
            } 
            /* wiping secret data as we no longer need it */ 
            OPENSSL_cleanse(hkey, strlen(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, 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); 
 
    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); 
#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_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) != 0 || 
            EVP_CIPHER_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; 
}