diff options
Diffstat (limited to 'sdk/recipes/files/openssl/ppc-amigaos/providers/implementations/rands/seeding/rand_amiga.c')
| -rw-r--r-- | sdk/recipes/files/openssl/ppc-amigaos/providers/implementations/rands/seeding/rand_amiga.c | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/sdk/recipes/files/openssl/ppc-amigaos/providers/implementations/rands/seeding/rand_amiga.c b/sdk/recipes/files/openssl/ppc-amigaos/providers/implementations/rands/seeding/rand_amiga.c new file mode 100644 index 0000000..ed315ed --- /dev/null +++ b/sdk/recipes/files/openssl/ppc-amigaos/providers/implementations/rands/seeding/rand_amiga.c @@ -0,0 +1,275 @@ +#include "internal/cryptlib.h" +#include <openssl/rand.h> +#include <openssl/sha.h> +#include "crypto/rand_pool.h" +#include "crypto/rand.h" +#include "prov/seeding.h" + +#if defined(OPENSSL_SYS_AMIGAOS3) || defined(OPENSSL_SYS_AMIGAOS4) + +# ifndef OPENSSL_RAND_SEED_OS +# error "Unsupported seeding method configured; must be os" +# endif + +#define __USE_INLINE__ 1 + +#include <sys/types.h> +#include <time.h> +#include <unistd.h> + +#include <proto/exec.h> +#include <proto/timer.h> +#include <devices/timer.h> + +/* Maximum number of attempts to get a delay of 1 microsecond that is not equal to 0 */ +#define MAX_ATTEMPTS 1000 + +#ifdef __amigaos4__ + +#ifdef CreateMsgPort +#undef CreateMsgPort +#endif +#define CreateMsgPort() AllocSysObject(ASOT_PORT,NULL) +#ifdef DeleteMsgPort +#undef DeleteMsgPort +#endif +#define DeleteMsgPort(msgPort) FreeSysObject(ASOT_PORT,msgPort) +#ifdef CreateIORequest +#undef CreateIORequest +#endif +#define CreateIORequest(ioReplyPort,size) AllocSysObjectTags(ASOT_IOREQUEST,ASOIOR_ReplyPort,ioReplyPort,ASOIOR_Size,size,TAG_DONE) +#ifdef DeleteIORequest +#undef DeleteIORequest +#endif +#define DeleteIORequest(ioReq) FreeSysObject(ASOT_IOREQUEST,ioReq) + +#else + +#define GetInterface(a, b, c, d) 1 +#define DropInterface(x) + +/* OS3 has a different but compatible TimeVal definition */ +struct TimeVal +{ + uint32 Seconds; + uint32 Microseconds; +}; + +#endif /* !__amigaos4__ */ + +size_t ossl_pool_acquire_entropy(RAND_POOL *pool) +{ + unsigned char temp_buffer[SHA_DIGEST_LENGTH], data_buffer[SHA_DIGEST_LENGTH]; + struct MsgPort *port = NULL; + size_t bytes_needed; + size_t entropy_available = 0; + struct TimeRequest *time_request = NULL; +#ifdef __amigaos4__ + struct IOStdReq *entropy_request = NULL; + + bytes_needed = ossl_rand_pool_bytes_needed(pool, 1); + + if ((port = CreateMsgPort()) + && (entropy_request = (struct IOStdReq *)CreateIORequest(port, sizeof(*entropy_request)))) + { + if (OpenDevice(TIMERNAME, UNIT_ENTROPY, (struct IORequest *)entropy_request, 0) == 0) + { + while(bytes_needed > 0) + { + entropy_request->io_Command = TR_READENTROPY; + entropy_request->io_Data = &temp_buffer[0]; + entropy_request->io_Length = sizeof(temp_buffer); + + if (DoIO((struct IORequest *)entropy_request) == 0) + { + unsigned char *buffer; + size_t bytes = (bytes_needed < sizeof(data_buffer) ? bytes_needed : sizeof(data_buffer)); + + buffer = ossl_rand_pool_add_begin(pool, bytes_needed); + SHA1(&temp_buffer[0], sizeof(temp_buffer), &data_buffer[0]); + memcpy(buffer, data_buffer, bytes); + ossl_rand_pool_add_end(pool, bytes, 8 * bytes); + bytes_needed -= bytes; + } + else + break; + } + + CloseDevice((struct IORequest *)entropy_request); + } + } + + DeleteIORequest((struct IORequest *)entropy_request); + + entropy_available = ossl_rand_pool_entropy_available(pool); + if (entropy_available > 0) + return entropy_available; +#endif /* __amigaos4__ */ + + /* The following block will be used on "classic" machines. It does not generate + * a high degree of randomness, but it does the job since RAND_poll is + * called only once by OpenSSL to generate a 32 byte seed. + */ + + bytes_needed = ossl_rand_pool_bytes_needed(pool, 1); + + if (bytes_needed > 0 + && (port || (port = CreateMsgPort())) + && (time_request = (struct TimeRequest *)CreateIORequest(port, sizeof(*time_request)))) + { + if (OpenDevice(TIMERNAME, UNIT_VBLANK, (struct IORequest *)time_request, 0) == 0) + { + #if defined(__amigaos4__) + struct TimerIFace *ITimer = NULL; + #endif + struct Device *TimerBase; + + if ((TimerBase = time_request->Request.io_Device) + #if defined(__amigaos4__) + && (ITimer = (struct TimerIFace *)GetInterface((struct Library *)TimerBase, "main", 1, NULL)) + #endif + ) + { + struct EClockVal curr_eclock; + ULONG prev_ev_lo = 0; + struct TimeVal tv; + int i, attempt; + BOOL aborted; + + ReadEClock(&curr_eclock); + aborted = FALSE; + + while(!aborted && bytes_needed > 0) + { + for(i = 0; + !aborted && i < (int)sizeof(temp_buffer) - (int)sizeof(ULONG); + i++) + { + attempt = 0; + + /* Ask for a one microsecond delay and measure the time + * the delay actually took. + */ + do + { + time_request->Request.io_Command = TR_ADDREQUEST; + time_request->Time.Seconds = 0; + time_request->Time.Microseconds = 1; + + if (DoIO((struct IORequest *)time_request) == 0) + { + prev_ev_lo = curr_eclock.ev_lo; + ReadEClock(&curr_eclock); + + attempt++; + } + else + aborted = TRUE; + } while(!aborted && prev_ev_lo == 0 && attempt < MAX_ATTEMPTS); + + if (attempt >= MAX_ATTEMPTS) + aborted = TRUE; + + /* Since we are going for randomness, ev_hi is irrelevant */ + temp_buffer[i] = (unsigned char)(curr_eclock.ev_lo - prev_ev_lo); + } + + GetSysTime(&tv); + + if (sizeof(temp_buffer) > sizeof(ULONG)) + *(ULONG *)&temp_buffer[sizeof(temp_buffer) - sizeof(ULONG)] + = tv.Microseconds; + + /* Shuffle the bits around and specify that about + * one fourth of it adds to the entropy. + */ + if (!aborted) + { + unsigned char *buffer; + size_t bytes = (bytes_needed < sizeof(data_buffer) ? bytes_needed : sizeof(data_buffer)); + + SHA1(&temp_buffer[0], sizeof(temp_buffer), &data_buffer[0]); + + ossl_rand_pool_add_end(pool, bytes, (sizeof(data_buffer) / 4) * 8); + bytes_needed -= bytes; + } + } + } + + #if defined(__amigaos4__) + DropInterface((struct Interface *)ITimer); + #endif + CloseDevice((struct IORequest *)time_request); + } + } + + DeleteIORequest((struct IORequest *)time_request); + + DeleteMsgPort(port); + + return ossl_rand_pool_entropy_available(pool); +} + +int ossl_pool_add_nonce_data(RAND_POOL *pool) +{ + struct { + pid_t pid; + CRYPTO_THREAD_ID tid; + uint64_t time; + } data; + + /* Erase the entire structure including any padding */ + memset(&data, 0, sizeof(data)); + + /* + * Add process id, thread id, and a high resolution timestamp to + * ensure that the nonce is unique with high probability for + * different process instances. + */ + data.pid = getpid(); + data.tid = CRYPTO_THREAD_get_current_id(); + /*XXX: can this be improved? */ + data.time = time(NULL); + + return ossl_rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0); +} + +int ossl_rand_pool_add_additional_data(RAND_POOL *pool) +{ + struct { + int fork_id; + CRYPTO_THREAD_ID tid; + uint64_t time; + } data; + + /* Erase the entire structure including any padding */ + memset(&data, 0, sizeof(data)); + + /* + * Add some noise from the thread id and a high resolution timer. + * The fork_id adds some extra fork-safety. + * The thread id adds a little randomness if the drbg is accessed + * concurrently (which is the case for the <master> drbg). + */ + data.fork_id = openssl_get_fork_id(); + data.tid = CRYPTO_THREAD_get_current_id(); + /*XXX: can this be improved? */ + data.time = (uint64_t) time(NULL); + + return ossl_rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0); +} + +int ossl_rand_pool_init(void) +{ + return 1; +} + +void ossl_rand_pool_cleanup(void) +{ +} + +void ossl_rand_pool_keep_random_devices_open(int keep) +{ +} + +#endif /* OPENSSL_SYS_AMIGA */ |