From 463e6ef500ead3fefccc470ce2f82429bb060e70 Mon Sep 17 00:00:00 2001 From: Richard Levitte Date: Wed, 2 May 2018 06:16:04 +0200 Subject: [PATCH] VMS: modernise rand_pool_acquire_entropy, step 2 Add more items that could serve as entropy source. Reviewed-by: Andy Polyakov (Merged from https://github.com/openssl/openssl/pull/6151) --- crypto/rand/rand_vms.c | 364 +++++++++++++++++++++++++++++++++++------ 1 file changed, 316 insertions(+), 48 deletions(-) diff --git a/crypto/rand/rand_vms.c b/crypto/rand/rand_vms.c index daae926ef5..0037466ef7 100644 --- a/crypto/rand/rand_vms.c +++ b/crypto/rand/rand_vms.c @@ -46,70 +46,255 @@ typedef uint32_t *uint32_t__ptr32; # pragma pointer_size restore # endif -static const struct item_st { +struct item_st { short length, code; /* length is number of bytes */ -} item_data[] = { - {4, JPI$_BUFIO}, - {4, JPI$_CPUTIM}, - {4, JPI$_DIRIO}, - {4, JPI$_IMAGECOUNT}, - {8, JPI$_LAST_LOGIN_I}, - {8, JPI$_LOGINTIM}, - {4, JPI$_PAGEFLTS}, - {4, JPI$_PID}, - {4, JPI$_PPGCNT}, - {4, JPI$_WSPEAK}, +}; + +static const struct item_st DVI_item_data[] = { + {4, DVI$_ERRCNT}, + {4, DVI$_REFCNT}, +}; + +static const struct item_st JPI_item_data[] = { + {4, JPI$_BUFIO}, + {4, JPI$_CPUTIM}, + {4, JPI$_DIRIO}, + {4, JPI$_IMAGECOUNT}, + {4, JPI$_PAGEFLTS}, + {4, JPI$_PID}, + {4, JPI$_PPGCNT}, + {4, JPI$_WSPEAK}, /* * Note: the direct result is just a 32-bit address. However, it points * to a list of 4 32-bit words, so we make extra space for them so we can * do in-place replacement of values */ - {16, JPI$_FINALEXC}, + {16, JPI$_FINALEXC}, +}; + +static const struct item_st JPI_item_data_64bit[] = { + {8, JPI$_LAST_LOGIN_I}, + {8, JPI$_LOGINTIM}, +}; + +static const struct item_st RMI_item_data[] = { + {4, RMI$_COLPG}, + {4, RMI$_MWAIT}, + {4, RMI$_CEF}, + {4, RMI$_PFW}, + {4, RMI$_LEF}, + {4, RMI$_LEFO}, + {4, RMI$_HIB}, + {4, RMI$_HIBO}, + {4, RMI$_SUSP}, + {4, RMI$_SUSPO}, + {4, RMI$_FPG}, + {4, RMI$_COM}, + {4, RMI$_COMO}, + {4, RMI$_CUR}, +#if defined __alpha + {4, RMI$_FRLIST}, + {4, RMI$_MODLIST}, +#endif + {4, RMI$_FAULTS}, + {4, RMI$_PREADS}, + {4, RMI$_PWRITES}, + {4, RMI$_PWRITIO}, + {4, RMI$_PREADIO}, + {4, RMI$_GVALFLTS}, + {4, RMI$_WRTINPROG}, + {4, RMI$_FREFLTS}, + {4, RMI$_DZROFLTS}, + {4, RMI$_SYSFAULTS}, + {4, RMI$_ISWPCNT}, + {4, RMI$_DIRIO}, + {4, RMI$_BUFIO}, + {4, RMI$_MBREADS}, + {4, RMI$_MBWRITES}, + {4, RMI$_LOGNAM}, + {4, RMI$_FCPCALLS}, + {4, RMI$_FCPREAD}, + {4, RMI$_FCPWRITE}, + {4, RMI$_FCPCACHE}, + {4, RMI$_FCPCPU}, + {4, RMI$_FCPHIT}, + {4, RMI$_FCPSPLIT}, + {4, RMI$_FCPFAULT}, + {4, RMI$_ENQNEW}, + {4, RMI$_ENQCVT}, + {4, RMI$_DEQ}, + {4, RMI$_BLKAST}, + {4, RMI$_ENQWAIT}, + {4, RMI$_ENQNOTQD}, + {4, RMI$_DLCKSRCH}, + {4, RMI$_DLCKFND}, + {4, RMI$_NUMLOCKS}, + {4, RMI$_NUMRES}, + {4, RMI$_ARRLOCPK}, + {4, RMI$_DEPLOCPK}, + {4, RMI$_ARRTRAPK}, + {4, RMI$_TRCNGLOS}, + {4, RMI$_RCVBUFFL}, + {4, RMI$_ENQNEWLOC}, + {4, RMI$_ENQNEWIN}, + {4, RMI$_ENQNEWOUT}, + {4, RMI$_ENQCVTLOC}, + {4, RMI$_ENQCVTIN}, + {4, RMI$_ENQCVTOUT}, + {4, RMI$_DEQLOC}, + {4, RMI$_DEQIN}, + {4, RMI$_DEQOUT}, + {4, RMI$_BLKLOC}, + {4, RMI$_BLKIN}, + {4, RMI$_BLKOUT}, + {4, RMI$_DIRIN}, + {4, RMI$_DIROUT}, + /* We currently get a fault when trying these. TODO: To be figured out. */ +#if 0 + {140, RMI$_MSCP_EVERYTHING}, /* 35 32-bit words */ + {152, RMI$_DDTM_ALL}, /* 38 32-bit words */ + {80, RMI$_TMSCP_EVERYTHING} /* 20 32-bit words */ +#endif + {4, RMI$_LPZ_PAGCNT}, + {4, RMI$_LPZ_HITS}, + {4, RMI$_LPZ_MISSES}, + {4, RMI$_LPZ_EXPCNT}, + {4, RMI$_LPZ_ALLOCF}, + {4, RMI$_LPZ_ALLOC2}, + {4, RMI$_ACCESS}, + {4, RMI$_ALLOC}, + {4, RMI$_FCPCREATE}, + {4, RMI$_VOLWAIT}, + {4, RMI$_FCPTURN}, + {4, RMI$_FCPERASE}, + {4, RMI$_OPENS}, + {4, RMI$_FIDHIT}, + {4, RMI$_FIDMISS}, + {4, RMI$_FILHDR_HIT}, + {4, RMI$_DIRFCB_HIT}, + {4, RMI$_DIRFCB_MISS}, + {4, RMI$_DIRDATA_HIT}, + {4, RMI$_EXTHIT}, + {4, RMI$_EXTMISS}, + {4, RMI$_QUOHIT}, + {4, RMI$_QUOMISS}, + {4, RMI$_STORAGMAP_HIT}, + {4, RMI$_VOLLCK}, + {4, RMI$_SYNCHLCK}, + {4, RMI$_SYNCHWAIT}, + {4, RMI$_ACCLCK}, + {4, RMI$_XQPCACHEWAIT}, + {4, RMI$_DIRDATA_MISS}, + {4, RMI$_FILHDR_MISS}, + {4, RMI$_STORAGMAP_MISS}, + {4, RMI$_PROCCNTMAX}, + {4, RMI$_PROCBATCNT}, + {4, RMI$_PROCINTCNT}, + {4, RMI$_PROCNETCNT}, + {4, RMI$_PROCSWITCHCNT}, + {4, RMI$_PROCBALSETCNT}, + {4, RMI$_PROCLOADCNT}, + {4, RMI$_BADFLTS}, + {4, RMI$_EXEFAULTS}, + {4, RMI$_HDRINSWAPS}, + {4, RMI$_HDROUTSWAPS}, + {4, RMI$_IOPAGCNT}, + {4, RMI$_ISWPCNTPG}, + {4, RMI$_OSWPCNT}, + {4, RMI$_OSWPCNTPG}, + {4, RMI$_RDFAULTS}, + {4, RMI$_TRANSFLTS}, + {4, RMI$_WRTFAULTS}, +#if defined __alpha + {4, RMI$_USERPAGES}, +#endif + {4, RMI$_VMSPAGES}, + {4, RMI$_TTWRITES}, + {4, RMI$_BUFOBJPAG}, + {4, RMI$_BUFOBJPAGPEAK}, + {4, RMI$_BUFOBJPAGS01}, + {4, RMI$_BUFOBJPAGS2}, + {4, RMI$_BUFOBJPAGMAXS01}, + {4, RMI$_BUFOBJPAGMAXS2}, + {4, RMI$_BUFOBJPAGPEAKS01}, + {4, RMI$_BUFOBJPAGPEAKS2}, + {4, RMI$_BUFOBJPGLTMAXS01}, + {4, RMI$_BUFOBJPGLTMAXS2}, + {4, RMI$_DLCK_INCMPLT}, + {4, RMI$_DLCKMSGS_IN}, + {4, RMI$_DLCKMSGS_OUT}, + {4, RMI$_MCHKERRS}, + {4, RMI$_MEMERRS}, +}; + +static const struct item_st RMI_item_data_64bit[] = { +#if defined __ia64 + {8, RMI$_FRLIST}, + {8, RMI$_MODLIST}, +#endif + {8, RMI$_LCKMGR_REQCNT}, + {8, RMI$_LCKMGR_REQTIME}, + {8, RMI$_LCKMGR_SPINCNT}, + {8, RMI$_LCKMGR_SPINTIME}, + {8, RMI$_CPUINTSTK}, + {8, RMI$_CPUMPSYNCH}, + {8, RMI$_CPUKERNEL}, + {8, RMI$_CPUEXEC}, + {8, RMI$_CPUSUPER}, + {8, RMI$_CPUUSER}, +#if defined __ia64 + {8, RMI$_USERPAGES}, +#endif + {8, RMI$_TQETOTAL}, + {8, RMI$_TQESYSUB}, + {8, RMI$_TQEUSRTIMR}, + {8, RMI$_TQEUSRWAKE}, +}; + +static const struct item_st SYI_item_data[] = { + {4, SYI$_PAGEFILE_FREE}, }; /* * Input: * items_data - an array of lengths and codes - * items_data_num - number of elements in that array, minus one - * (caller MUST have space for one extra NULL element) + * items_data_num - number of elements in that array * * Output: * items - pre-allocated ILE3 array to be filled. - * It's assume to have items_data_num elements. + * It's assumed to have items_data_num elements plus + * one extra for the terminating NULL element * databuffer - pre-allocated 32-bit word array. * - * Returns the number of bytes used in databuffer + * Returns the number of elements used in databuffer */ static size_t prepare_item_list(const struct item_st *items_input, size_t items_input_num, ILE3 *items, uint32_t__ptr32 databuffer) { - const struct item_st *pitems_input; - ILE3 *pitems; size_t data_sz = 0; - for (pitems_input = items_input, pitems = items; - items_input_num-- > 0; - pitems_input++, pitems++) { + for (; items_input_num-- > 0; items_input++, items++) { /* Special treatment of JPI$_FINALEXC */ - if (pitems->ile3$w_code == JPI$_FINALEXC) - pitems->ile3$w_length = 4; + if (items->ile3$w_code == JPI$_FINALEXC) + items->ile3$w_length = 4; else - pitems->ile3$w_length = pitems_input->length; + items->ile3$w_length = items_input->length; - pitems->ile3$w_code = pitems_input->code; - pitems->ile3$ps_bufaddr = databuffer; - pitems->ile3$ps_retlen_addr = 0; + items->ile3$w_code = items_input->code; + items->ile3$ps_bufaddr = databuffer; + items->ile3$ps_retlen_addr = 0; - databuffer += pitems_input->length / sizeof(*databuffer); - data_sz += pitems_input->length; + databuffer += items_input->length / sizeof(databuffer[0]); + data_sz += items_input->length; } /* Terminating NULL entry */ - pitems->ile3$w_length = pitems->ile3$w_code = 0; + items->ile3$w_length = items->ile3$w_code = 0; + items->ile3$ps_bufaddr = items->ile3$ps_retlen_addr = NULL; - return data_sz; + return data_sz / sizeof(databuffer[0]); } static void massage_JPI(ILE3 *items) @@ -140,38 +325,121 @@ static void massage_JPI(ILE3 *items) /* * This number expresses how many bits of data contain 1 bit of entropy. * - * For the moment, we assume about 0.5 entropy bits per data bit, or 1 - * bit of entropy per 2 data bits. + * For the moment, we assume about 0.05 entropy bits per data bit, or 1 + * bit of entropy per 20 data bits. */ -#define ENTROPY_FACTOR 2 +#define ENTROPY_FACTOR 20 size_t rand_pool_acquire_entropy(RAND_POOL *pool) { - ILE3 items[OSSL_NELEM(item_data) + 1]; - /* - * All items get 1 or 2 32-bit words of data, except JPI$_FINALEXC - * We make sure that we have ample space - */ - uint32_t data_buffer[(OSSL_NELEM(item_data)) * 2 + 4]; + ILE3 JPI_items_64bit[OSSL_NELEM(JPI_item_data_64bit) + 1]; + ILE3 RMI_items_64bit[OSSL_NELEM(RMI_item_data_64bit) + 1]; + ILE3 DVI_items[OSSL_NELEM(DVI_item_data) + 1]; + ILE3 JPI_items[OSSL_NELEM(JPI_item_data) + 1]; + ILE3 RMI_items[OSSL_NELEM(RMI_item_data) + 1]; + ILE3 SYI_items[OSSL_NELEM(SYI_item_data) + 1]; + union { + /* This ensures buffer starts at 64 bit boundary */ + uint64_t dummy; + uint32_t buffer[OSSL_NELEM(JPI_item_data_64bit) * 2 + + OSSL_NELEM(RMI_item_data_64bit) * 2 + + OSSL_NELEM(DVI_item_data) + + OSSL_NELEM(JPI_item_data) + + OSSL_NELEM(RMI_item_data) + + OSSL_NELEM(SYI_item_data) + + 4 /* For JPI$_FINALEXC */]; + } data; + size_t total_elems = 0; size_t total_length = 0; size_t bytes_needed = rand_pool_bytes_needed(pool, ENTROPY_FACTOR); size_t bytes_remaining = rand_pool_bytes_remaining(pool); - total_length += prepare_item_list(item_data, OSSL_NELEM(item_data), - items, &data_buffer[total_length]); + /* Take all the 64-bit items first, to ensure proper alignment of data */ + total_elems += + prepare_item_list(JPI_item_data_64bit, OSSL_NELEM(JPI_item_data_64bit), + JPI_items_64bit, &data.buffer[total_elems]); + total_elems += + prepare_item_list(RMI_item_data_64bit, OSSL_NELEM(RMI_item_data_64bit), + RMI_items_64bit, &data.buffer[total_elems]); + /* Now the 32-bit items */ + total_elems += prepare_item_list(DVI_item_data, OSSL_NELEM(DVI_item_data), + DVI_items, &data.buffer[total_elems]); + total_elems += prepare_item_list(JPI_item_data, OSSL_NELEM(JPI_item_data), + JPI_items, &data.buffer[total_elems]); + total_elems += prepare_item_list(RMI_item_data, OSSL_NELEM(RMI_item_data), + RMI_items, &data.buffer[total_elems]); + total_elems += prepare_item_list(SYI_item_data, OSSL_NELEM(SYI_item_data), + SYI_items, &data.buffer[total_elems]); + total_length = total_elems * sizeof(data.buffer[0]); - /* Fill data_buffer with various info bits from this process */ + /* Fill data.buffer with various info bits from this process */ { uint32_t status; + uint32_t efn; + IOSB iosb; + $DESCRIPTOR(SYSDEVICE,"SYS$SYSDEVICE:"); - if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, items, 0, 0, 0)) + if ((status = sys$getdviw(EFN$C_ENF, 0, &SYSDEVICE, DVI_items, + 0, 0, 0, 0, 0)) != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, JPI_items_64bit, 0, 0, 0)) != SS$_NORMAL) { lib$signal(status); return 0; } + if ((status = sys$getjpiw(EFN$C_ENF, 0, 0, JPI_items, 0, 0, 0)) + != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if ((status = sys$getsyiw(EFN$C_ENF, 0, 0, SYI_items, 0, 0, 0)) + != SS$_NORMAL) { + lib$signal(status); + return 0; + } + /* + * The RMI service is a bit special, as there is no synchronous + * variant, so we MUST create an event flag to synchronise on. + */ + if ((status = lib$get_ef(&efn)) != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if ((status = sys$getrmi(efn, 0, 0, RMI_items_64bit, &iosb, 0, 0)) + != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if ((status = sys$synch(efn, &iosb)) != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if (iosb.iosb$l_getxxi_status != SS$_NORMAL) { + lib$signal(iosb.iosb$l_getxxi_status); + return 0; + } + if ((status = sys$getrmi(efn, 0, 0, RMI_items, &iosb, 0, 0)) + != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if ((status = sys$synch(efn, &iosb)) != SS$_NORMAL) { + lib$signal(status); + return 0; + } + if (iosb.iosb$l_getxxi_status != SS$_NORMAL) { + lib$signal(iosb.iosb$l_getxxi_status); + return 0; + } + if ((status = lib$free_ef(&efn)) != SS$_NORMAL) { + lib$signal(status); + return 0; + } } - massage_JPI(items); + massage_JPI(JPI_items); /* * If we can't feed the requirements from the caller, we're in deep trouble. @@ -196,8 +464,8 @@ size_t rand_pool_acquire_entropy(RAND_POOL *pool) total_length = bytes_remaining; /* We give the pessimistic value for the amount of entropy */ - rand_pool_add(pool, (unsigned char *)data_buffer, total_length, - total_length / ENTROPY_FACTOR); + rand_pool_add(pool, (unsigned char *)data.buffer, total_length, + 8 * total_length / ENTROPY_FACTOR); return rand_pool_entropy_available(pool); }