X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=bacula%2Fsrc%2Ffiled%2Frestore.c;h=d0ec052d3de0180488d75ce4526bf76cb66ec467;hb=dc8c95ac4206814f381d10c0a425d76f45d8bdc4;hp=4ca022dee0d1fe1d60c0dc690c0758dafbd89a77;hpb=5de97d6f0ee8002de6c0c1a907b86a2c2f42f9bc;p=bacula%2Fbacula diff --git a/bacula/src/filed/restore.c b/bacula/src/filed/restore.c index 4ca022dee0..d0ec052d3d 100644 --- a/bacula/src/filed/restore.c +++ b/bacula/src/filed/restore.c @@ -7,7 +7,7 @@ * */ /* - Copyright (C) 2000-2005 Kern Sibbald + Copyright (C) 2000-2006 Kern Sibbald This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License @@ -28,17 +28,27 @@ #include #endif +#if defined(HAVE_CRYPTO) +const bool have_crypto = true; +#else +const bool have_crypto = false; +#endif + /* Data received from Storage Daemon */ static char rec_header[] = "rechdr %ld %ld %ld %ld %ld"; /* Forward referenced functions */ -#ifdef HAVE_LIBZ +#if defined(HAVE_LIBZ) static const char *zlib_strerror(int stat); +const bool have_libz = true; +#else +const bool have_libz = false; #endif int verify_signature(JCR *jcr, SIGNATURE *sig); int32_t extract_data(JCR *jcr, BFILE *bfd, POOLMEM *buf, int32_t buflen, - uint64_t *addr, int flags); + uint64_t *addr, int flags, CIPHER_CONTEXT *cipher, uint32_t cipher_block_size); +bool flush_cipher(JCR *jcr, BFILE *bfd, int flags, CIPHER_CONTEXT *cipher, uint32_t cipher_block_size); #define RETRY 10 /* retry wait time */ @@ -83,7 +93,10 @@ void do_restore(JCR *jcr) uint64_t alt_addr = 0; /* Write address for alternative stream */ intmax_t alt_size = 0; /* Size of alternate stream */ SIGNATURE *sig = NULL; /* Cryptographic signature (if any) for file */ - int flags; /* Options for extract_data() */ + CRYPTO_SESSION *cs = NULL; /* Cryptographic session data (if any) for file */ + CIPHER_CONTEXT *cipher_ctx = NULL; /* Cryptographic cipher context (if any) for file */ + uint32_t cipher_block_size = 0; /* Cryptographic algorithm block size for file */ + int flags = 0; /* Options for extract_data() */ int stat; ATTR *attr; @@ -123,24 +136,53 @@ void do_restore(JCR *jcr) } jcr->buf_size = sd->msglen; -#ifdef HAVE_LIBZ - uint32_t compress_buf_size = jcr->buf_size + 12 + ((jcr->buf_size+999) / 1000) + 100; - jcr->compress_buf = (char *)bmalloc(compress_buf_size); - jcr->compress_buf_size = compress_buf_size; +#ifdef stbernard_implemented +/ #if defined(HAVE_WIN32) + bool bResumeOfmOnExit = FALSE; + if (isOpenFileManagerRunning()) { + if ( pauseOpenFileManager() ) { + Jmsg(jcr, M_INFO, 0, _("Open File Manager paused\n") ); + bResumeOfmOnExit = TRUE; + } + else { + Jmsg(jcr, M_ERROR, 0, _("FAILED to pause Open File Manager\n") ); + } + } + { + char username[UNLEN+1]; + DWORD usize = sizeof(username); + int privs = enable_backup_privileges(NULL, 1); + if (GetUserName(username, &usize)) { + Jmsg2(jcr, M_INFO, 0, _("Running as '%s'. Privmask=%#08x\n"), username, + } else { + Jmsg(jcr, M_WARNING, 0, _("Failed to retrieve current UserName\n")); + } + } #endif + if (have_libz) { + uint32_t compress_buf_size = jcr->buf_size + 12 + ((jcr->buf_size+999) / 1000) + 100; + jcr->compress_buf = (char *)bmalloc(compress_buf_size); + jcr->compress_buf_size = compress_buf_size; + } + + if (have_crypto) { + jcr->crypto_buf = get_memory(CRYPTO_CIPHER_MAX_BLOCK_SIZE); + } + /* * Get a record from the Storage daemon. We are guaranteed to * receive records in the following order: * 1. Stream record header * 2. Stream data * a. Attributes (Unix or Win32) - * or b. File data for the file - * or c. Alternate data stream (e.g. Resource Fork) - * or d. Finder info - * or e. ACLs - * or f. Possibly a cryptographic signature - * or g. Possibly MD5 or SHA1 record + * b. Possibly stream encryption session data (e.g., symmetric session key) + * or c. File data for the file + * or d. Alternate data stream (e.g. Resource Fork) + * or e. Finder info + * or f. ACLs + * or g. Possibly a cryptographic signature + * or h. Possibly MD5 or SHA1 record * 3. Repeat step 1 * * NOTE: We keep track of two bacula file descriptors: @@ -204,25 +246,33 @@ void do_restore(JCR *jcr) if (size > 0 && !is_bopen(&bfd)) { Jmsg0(jcr, M_ERROR, 0, _("Logic error: output file should be open\n")); } + /* Flush and deallocate previous stream's cipher context */ + if (cipher_ctx && prev_stream != STREAM_ENCRYPTED_SESSION_DATA) { + flush_cipher(jcr, &bfd, flags, cipher_ctx, cipher_block_size); + crypto_cipher_free(cipher_ctx); + cipher_ctx = NULL; + } set_attributes(jcr, attr, &bfd); extract = false; /* Verify the cryptographic signature, if any */ if (jcr->pki_sign) { if (sig) { - if (!verify_signature(jcr, sig)) { - // TODO landonf: Better signature failure handling. - // The failure is reported to the director in verify_signature() ... - Dmsg1(100, "Bad signature on %s\n", jcr->last_fname); - } else { - Dmsg1(100, "Signature good on %s\n", jcr->last_fname); - } - crypto_sign_free(sig); - sig = NULL; + // Failure is reported in verify_signature() ... + verify_signature(jcr, sig); } else { Jmsg1(jcr, M_ERROR, 0, _("Missing cryptographic signature for %s\n"), jcr->last_fname); } } + /* Free Signature */ + if (sig) { + crypto_sign_free(sig); + sig = NULL; + } + if (cs) { + crypto_session_free(cs); + cs = NULL; + } Dmsg0(30, "Stop extracting.\n"); } else if (is_bopen(&bfd)) { Jmsg0(jcr, M_ERROR, 0, _("Logic error: output file should not be open\n")); @@ -272,10 +322,11 @@ void do_restore(JCR *jcr) extract = true; /* FALLTHROUGH */ case CF_CREATED: /* File created, but there is no content */ - P(jcr->mutex); + jcr->lock(); pm_strcpy(jcr->last_fname, attr->ofname); - V(jcr->mutex); + jcr->last_type = attr->type; jcr->JobFiles++; + jcr->unlock(); fileAddr = 0; print_ls_output(jcr, attr); #ifdef HAVE_DARWIN_OS @@ -294,30 +345,85 @@ void do_restore(JCR *jcr) break; /* Data stream */ + case STREAM_ENCRYPTED_SESSION_DATA: + crypto_error_t cryptoerr; + + Dmsg1(30, "Stream=Encrypted Session Data, size: %d\n", sd->msglen); + + /* Decode and save session keys. */ + cryptoerr = crypto_session_decode((uint8_t *)sd->msg, (uint32_t)sd->msglen, jcr->pki_recipients, &cs); + switch(cryptoerr) { + case CRYPTO_ERROR_NONE: + /* Success */ + break; + case CRYPTO_ERROR_NORECIPIENT: + Jmsg(jcr, M_ERROR, 0, _("Missing private key required to decrypt encrypted backup data.")); + break; + case CRYPTO_ERROR_DECRYPTION: + Jmsg(jcr, M_ERROR, 0, _("Decrypt of the session key failed.")); + break; + default: + /* Shouldn't happen */ + Jmsg1(jcr, M_ERROR, 0, _("An error occured while decoding encrypted session data stream: %s"), crypto_strerror(cryptoerr)); + break; + } + + if (cryptoerr != CRYPTO_ERROR_NONE) { + extract = false; + bclose(&bfd); + continue; + } + + /* Set up a decryption context */ + if ((cipher_ctx = crypto_cipher_new(cs, false, &cipher_block_size)) == NULL) { + Jmsg1(jcr, M_ERROR, 0, _("Failed to initialize decryption context for %s\n"), jcr->last_fname); + crypto_session_free(cs); + cs = NULL; + extract = false; + bclose(&bfd); + continue; + } + break; + case STREAM_FILE_DATA: case STREAM_SPARSE_DATA: case STREAM_WIN32_DATA: case STREAM_GZIP_DATA: case STREAM_SPARSE_GZIP_DATA: case STREAM_WIN32_GZIP_DATA: + case STREAM_ENCRYPTED_FILE_DATA: + case STREAM_ENCRYPTED_WIN32_DATA: + case STREAM_ENCRYPTED_FILE_GZIP_DATA: + case STREAM_ENCRYPTED_WIN32_GZIP_DATA: /* Force an expected, consistent stream type here */ if (extract && (prev_stream == stream || prev_stream == STREAM_UNIX_ATTRIBUTES - || prev_stream == STREAM_UNIX_ATTRIBUTES_EX)) { + || prev_stream == STREAM_UNIX_ATTRIBUTES_EX + || prev_stream == STREAM_ENCRYPTED_SESSION_DATA)) { flags = 0; + if (stream == STREAM_SPARSE_DATA || stream == STREAM_SPARSE_GZIP_DATA) { flags |= FO_SPARSE; } + if (stream == STREAM_GZIP_DATA || stream == STREAM_SPARSE_GZIP_DATA - || stream == STREAM_WIN32_GZIP_DATA) { + || stream == STREAM_WIN32_GZIP_DATA || stream == STREAM_ENCRYPTED_FILE_GZIP_DATA + || stream == STREAM_ENCRYPTED_WIN32_GZIP_DATA) { flags |= FO_GZIP; } + if (stream == STREAM_ENCRYPTED_FILE_DATA + || stream == STREAM_ENCRYPTED_FILE_GZIP_DATA + || stream == STREAM_ENCRYPTED_WIN32_DATA + || stream == STREAM_ENCRYPTED_WIN32_GZIP_DATA) { + flags |= FO_ENCRYPT; + } + if (is_win32_stream(stream) && !have_win32_api()) { set_portable_backup(&bfd); flags |= FO_WIN32DECOMP; /* "decompose" BackupWrite data */ } - if (extract_data(jcr, &bfd, sd->msg, sd->msglen, &fileAddr, flags) < 0) { + if (extract_data(jcr, &bfd, sd->msg, sd->msglen, &fileAddr, flags, cipher_ctx, cipher_block_size) < 0) { extract = false; bclose(&bfd); continue; @@ -327,6 +433,8 @@ void do_restore(JCR *jcr) /* Resource fork stream - only recorded after a file to be restored */ /* Silently ignore if we cannot write - we already reported that */ + case STREAM_ENCRYPTED_MACOS_FORK_DATA: + flags |= FO_ENCRYPT; case STREAM_MACOS_FORK_DATA: #ifdef HAVE_DARWIN_OS if (extract) { @@ -340,7 +448,7 @@ void do_restore(JCR *jcr) Dmsg0(30, "Restoring resource fork\n"); } flags = 0; - if (extract_data(jcr, &altbfd, sd->msg, sd->msglen, &alt_addr, flags) < 0) { + if (extract_data(jcr, &altbfd, sd->msg, sd->msglen, &alt_addr, flags, cipher_ctx, cipher_block_size) < 0) { extract = false; bclose(&altbfd); continue; @@ -392,7 +500,9 @@ void do_restore(JCR *jcr) case STREAM_SIGNED_DIGEST: /* Save signature. */ - sig = crypto_sign_decode(sd->msg, (size_t) sd->msglen); + if ((sig = crypto_sign_decode((uint8_t *)sd->msg, (uint32_t)sd->msglen)) == NULL) { + Jmsg1(jcr, M_ERROR, 0, _("Failed to decode message signature for %s\n"), jcr->last_fname); + } break; case STREAM_MD5_DIGEST: @@ -416,7 +526,24 @@ void do_restore(JCR *jcr) if (size > 0 && !is_bopen(&bfd)) { Jmsg0(jcr, M_ERROR, 0, _("Logic error: output file should be open\n")); } + /* Flush and deallocate cipher context */ + if (cipher_ctx) { + flush_cipher(jcr, &bfd, flags, cipher_ctx, cipher_block_size); + crypto_cipher_free(cipher_ctx); + cipher_ctx = NULL; + } set_attributes(jcr, attr, &bfd); + + /* Verify the cryptographic signature if any */ + if (jcr->pki_sign) { + if (sig) { + // Failure is reported in verify_signature() ... + verify_signature(jcr, sig); + } else { + Jmsg1(jcr, M_ERROR, 0, _("Missing cryptographic signature for %s\n"), jcr->last_fname); + } + } + extract = false; } else if (is_bopen(&bfd)) { Jmsg0(jcr, M_ERROR, 0, _("Logic error: output file should not be open\n")); @@ -436,22 +563,58 @@ void do_restore(JCR *jcr) bclose_chksize(jcr, &altbfd, alt_size); } if (extract) { + /* Flush and deallocate cipher context */ + if (cipher_ctx) { + flush_cipher(jcr, &bfd, flags, cipher_ctx, cipher_block_size); + crypto_cipher_free(cipher_ctx); + cipher_ctx = NULL; + } set_attributes(jcr, attr, &bfd); + + /* Verify the cryptographic signature on the last file, if any */ + if (jcr->pki_sign) { + if (sig) { + // Failure is reported in verify_signature() ... + verify_signature(jcr, sig); + } else { + Jmsg1(jcr, M_ERROR, 0, _("Missing cryptographic signature for %s\n"), jcr->last_fname); + } + } } + if (is_bopen(&bfd)) { bclose(&bfd); } + set_jcr_job_status(jcr, JS_Terminated); goto ok_out; bail_out: set_jcr_job_status(jcr, JS_ErrorTerminated); ok_out: + + /* Free Signature & Crypto Data */ + if (sig) { + crypto_sign_free(sig); + sig = NULL; + } + if (cs) { + crypto_session_free(cs); + cs = NULL; + } + if (cipher_ctx) { + crypto_cipher_free(cipher_ctx); + cipher_ctx = NULL; + } if (jcr->compress_buf) { free(jcr->compress_buf); jcr->compress_buf = NULL; jcr->compress_buf_size = 0; } + if (jcr->crypto_buf) { + free_pool_memory(jcr->crypto_buf); + jcr->crypto_buf = NULL; + } bclose(&altbfd); bclose(&bfd); free_attr(attr); @@ -474,7 +637,6 @@ ok_out: } -#ifdef HAVE_LIBZ /* * Convert ZLIB error code into an ASCII message */ @@ -500,10 +662,10 @@ static const char *zlib_strerror(int stat) return _("*none*"); } } -#endif -static int do_file_digest(FF_PKT *ff_pkt, void *pkt, bool top_level) { - JCR *jcr = (JCR *) pkt; +static int do_file_digest(FF_PKT *ff_pkt, void *pkt, bool top_level) +{ + JCR *jcr = (JCR *)pkt; return (digest_file(jcr, ff_pkt, jcr->digest)); } @@ -511,6 +673,7 @@ static int do_file_digest(FF_PKT *ff_pkt, void *pkt, bool top_level) { * Verify the signature for the last restored file * Return value is either true (signature correct) * or false (signature could not be verified). + * TODO landonf: Better signature failure handling. */ int verify_signature(JCR *jcr, SIGNATURE *sig) { @@ -518,7 +681,6 @@ int verify_signature(JCR *jcr, SIGNATURE *sig) DIGEST *digest = NULL; crypto_error_t err; - /* Iterate through the trusted signers */ foreach_alist(keypair, jcr->pki_signers) { err = crypto_sign_get_digest(sig, jcr->pki_keypair, &digest); @@ -536,12 +698,14 @@ int verify_signature(JCR *jcr, SIGNATURE *sig) /* Verify the signature */ if ((err = crypto_sign_verify(sig, keypair, digest)) != CRYPTO_ERROR_NONE) { + Dmsg1(100, "Bad signature on %s\n", jcr->last_fname); Qmsg2(jcr, M_ERROR, 0, _("Signature validation failed for %s: %s\n"), jcr->last_fname, crypto_strerror(err)); crypto_digest_free(digest); return false; } /* Valid signature */ + Dmsg1(100, "Signature good on %s\n", jcr->last_fname); crypto_digest_free(digest); return true; @@ -558,7 +722,9 @@ int verify_signature(JCR *jcr, SIGNATURE *sig) } } - /* Unreachable */ + /* No signer */ + Dmsg1(100, "Could not find a valid public key for signature on %s\n", jcr->last_fname); + crypto_digest_free(digest); return false; } @@ -569,13 +735,16 @@ int verify_signature(JCR *jcr, SIGNATURE *sig) * Return value is the number of bytes written, or -1 on errors. */ int32_t extract_data(JCR *jcr, BFILE *bfd, POOLMEM *buf, int32_t buflen, - uint64_t *addr, int flags) + uint64_t *addr, int flags, CIPHER_CONTEXT *cipher, uint32_t cipher_block_size) { int stat; char *wbuf; /* write buffer */ uint32_t wsize; /* write size */ uint32_t rsize; /* read size */ char ec1[50]; /* Buffer printing huge values */ + const uint8_t *cipher_input; /* Decryption input */ + uint32_t cipher_input_len; /* Decryption input length */ + uint32_t decrypted_len = 0; /* Decryption output length */ if (flags & FO_SPARSE) { ser_declare; @@ -600,6 +769,8 @@ int32_t extract_data(JCR *jcr, BFILE *bfd, POOLMEM *buf, int32_t buflen, rsize = buflen; } wsize = rsize; + cipher_input = (uint8_t *)wbuf; + cipher_input_len = (uint32_t)wsize; if (flags & FO_GZIP) { #ifdef HAVE_LIBZ @@ -619,6 +790,8 @@ int32_t extract_data(JCR *jcr, BFILE *bfd, POOLMEM *buf, int32_t buflen, } wbuf = jcr->compress_buf; wsize = compress_len; + cipher_input = (uint8_t *)jcr->compress_buf; /* decrypt decompressed data */ + cipher_input_len = compress_len; Dmsg2(100, "Write uncompressed %d bytes, total before write=%s\n", compress_len, edit_uint64(jcr->JobBytes, ec1)); #else Qmsg(jcr, M_ERROR, 0, _("GZIP data stream found, but GZIP not configured!\n")); @@ -628,6 +801,36 @@ int32_t extract_data(JCR *jcr, BFILE *bfd, POOLMEM *buf, int32_t buflen, Dmsg2(30, "Write %u bytes, total before write=%s\n", wsize, edit_uint64(jcr->JobBytes, ec1)); } + if (flags & FO_ENCRYPT) { + ASSERT(cipher); + + /* + * Grow the crypto buffer, if necessary. + * crypto_cipher_update() will process only whole blocks, + * buffering the remaining input. + */ + jcr->crypto_buf = check_pool_memory_size(jcr->crypto_buf, cipher_input_len + cipher_block_size); + + + /* Encrypt the input block */ + if (!crypto_cipher_update(cipher, cipher_input, cipher_input_len, (uint8_t *)jcr->crypto_buf, &decrypted_len)) { + /* Decryption failed. Shouldn't happen. */ + Jmsg(jcr, M_FATAL, 0, _("Decryption error\n")); + return -1; + } + + if (decrypted_len == 0) { + /* No full block of data available, write more data */ + goto ok; + } + + Dmsg2(400, "decrypted len=%d undecrypted len=%d\n", + decrypted_len, cipher_input_len); + wsize = decrypted_len; + wbuf = jcr->crypto_buf; /* Decrypted, possibly decompressed output here. */ + } + + if (flags & FO_WIN32DECOMP) { if (!processWin32BackupAPIBlock(bfd, wbuf, wsize)) { berrno be; @@ -642,9 +845,50 @@ int32_t extract_data(JCR *jcr, BFILE *bfd, POOLMEM *buf, int32_t buflen, return -1; } + if (decrypted_len && decrypted_len > wsize) { + /* If more than wsize is output, it was previously buffered + * and reported, and should not be reported again */ + wsize = wsize - decrypted_len; + } + +ok: jcr->JobBytes += wsize; jcr->ReadBytes += rsize; *addr += wsize; return wsize; } + +/* + * In the context of jcr, flush any remaining data from the cipher context, + * writing it to bfd. + * Return value is true on success, false on failure. + */ +bool flush_cipher(JCR *jcr, BFILE *bfd, int flags, CIPHER_CONTEXT *cipher, uint32_t cipher_block_size) +{ + uint32_t decrypted_len; + + /* Write out the remaining block and free the cipher context */ + jcr->crypto_buf = check_pool_memory_size(jcr->crypto_buf, cipher_block_size); + + if (!crypto_cipher_finalize(cipher, (uint8_t *)jcr->crypto_buf, &decrypted_len)) { + /* Writing out the final, buffered block failed. Shouldn't happen. */ + Jmsg1(jcr, M_FATAL, 0, _("Decryption error for %s\n"), jcr->last_fname); + } + + if (flags & FO_WIN32DECOMP) { + if (!processWin32BackupAPIBlock(bfd, jcr->crypto_buf, decrypted_len)) { + berrno be; + Jmsg2(jcr, M_ERROR, 0, _("Write error in Win32 Block Decomposition on %s: %s\n"), + jcr->last_fname, be.strerror(bfd->berrno)); + return false; + } + } else if (bwrite(bfd, jcr->crypto_buf, decrypted_len) != (ssize_t)decrypted_len) { + berrno be; + Jmsg2(jcr, M_ERROR, 0, _("Write error on %s: %s\n"), + jcr->last_fname, be.strerror(bfd->berrno)); + return false; + } + + return true; +}