| 1 |
/* Test program to verify that RSA signing is thread-safe in OpenSSL. */ |
| 2 |
|
| 3 |
#include <assert.h> |
| 4 |
#include <errno.h> |
| 5 |
#include <fcntl.h> |
| 6 |
#include <limits.h> |
| 7 |
#include <pthread.h> |
| 8 |
#include <stdio.h> |
| 9 |
#include <string.h> |
| 10 |
#include <unistd.h> |
| 11 |
|
| 12 |
#include <openssl/crypto.h> |
| 13 |
#include <openssl/err.h> |
| 14 |
#include <openssl/objects.h> |
| 15 |
#include <openssl/rand.h> |
| 16 |
#include <openssl/rsa.h> |
| 17 |
#include <openssl/md5.h> |
| 18 |
#include <openssl/ssl.h> |
| 19 |
|
| 20 |
/* Just assume we want to do engine stuff if we're using 0.9.6b or |
| 21 |
* higher. This assumption is only valid for versions bundled with RHL. */ |
| 22 |
#if OPENSSL_VERSION_NUMBER >= 0x0090602fL |
| 23 |
#include <openssl/engine.h> |
| 24 |
#define USE_ENGINE |
| 25 |
#endif |
| 26 |
|
| 27 |
#define MAX_THREAD_COUNT 10000 |
| 28 |
#define ITERATION_COUNT 10 |
| 29 |
#define MAIN_COUNT 100 |
| 30 |
|
| 31 |
/* OpenSSL requires us to provide thread ID and locking primitives. */ |
| 32 |
pthread_mutex_t *mutex_locks = NULL; |
| 33 |
static unsigned long |
| 34 |
thread_id_cb(void) |
| 35 |
{ |
| 36 |
return (unsigned long) pthread_self(); |
| 37 |
} |
| 38 |
static void |
| 39 |
lock_cb(int mode, int n, const char *file, int line) |
| 40 |
{ |
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if (mode & CRYPTO_LOCK) { |
| 42 |
pthread_mutex_lock(&mutex_locks[n]); |
| 43 |
} else { |
| 44 |
pthread_mutex_unlock(&mutex_locks[n]); |
| 45 |
} |
| 46 |
} |
| 47 |
|
| 48 |
struct thread_args { |
| 49 |
RSA *rsa; |
| 50 |
int digest_type; |
| 51 |
unsigned char *digest; |
| 52 |
unsigned int digest_len; |
| 53 |
unsigned char *signature; |
| 54 |
unsigned int signature_len; |
| 55 |
pthread_t main_thread; |
| 56 |
}; |
| 57 |
|
| 58 |
static int print = 0; |
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|
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pthread_mutex_t sign_lock = PTHREAD_MUTEX_INITIALIZER; |
| 61 |
static int locked_sign = 0; |
| 62 |
static void SIGN_LOCK() {if (locked_sign) pthread_mutex_lock(&sign_lock);} |
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static void SIGN_UNLOCK() {if (locked_sign) pthread_mutex_unlock(&sign_lock);} |
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|
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pthread_mutex_t verify_lock = PTHREAD_MUTEX_INITIALIZER; |
| 66 |
static int locked_verify = 0; |
| 67 |
static void VERIFY_LOCK() {if (locked_verify) pthread_mutex_lock(&verify_lock);} |
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static void VERIFY_UNLOCK() {if (locked_verify) pthread_mutex_unlock(&verify_lock);} |
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|
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pthread_mutex_t failure_count_lock = PTHREAD_MUTEX_INITIALIZER; |
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long failure_count = 0; |
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static void |
| 73 |
failure() |
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{ |
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pthread_mutex_lock(&failure_count_lock); |
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failure_count++; |
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pthread_mutex_unlock(&failure_count_lock); |
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} |
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|
| 80 |
static void * |
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thread_main(void *argp) |
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{ |
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struct thread_args *args = argp; |
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unsigned char *signature; |
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unsigned int signature_len, signature_alloc_len; |
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int ret, i; |
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|
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signature_alloc_len = args->signature_len; |
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if (RSA_size(args->rsa) > signature_alloc_len) { |
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signature_alloc_len = RSA_size(args->rsa); |
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} |
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signature = malloc(signature_alloc_len); |
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if (signature == NULL) { |
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fprintf(stderr, "Skipping checks in thread %lu -- %s.\n", |
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(unsigned long) pthread_self(), strerror(errno)); |
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pthread_exit(0); |
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return NULL; |
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} |
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for (i = 0; i < ITERATION_COUNT; i++) { |
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signature_len = signature_alloc_len; |
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SIGN_LOCK(); |
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ret = RSA_check_key(args->rsa); |
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ERR_print_errors_fp(stdout); |
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if (ret != 1) { |
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failure(); |
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break; |
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} |
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ret = RSA_sign(args->digest_type, |
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args->digest, |
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args->digest_len, |
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signature, &signature_len, |
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args->rsa); |
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SIGN_UNLOCK(); |
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ERR_print_errors_fp(stdout); |
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if (ret != 1) { |
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failure(); |
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break; |
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} |
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|
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VERIFY_LOCK(); |
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ret = RSA_verify(args->digest_type, |
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args->digest, |
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args->digest_len, |
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signature, signature_len, |
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args->rsa); |
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VERIFY_UNLOCK(); |
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if (ret != 1) { |
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fprintf(stderr, |
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"Signature from thread %lu(%d) fails " |
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"verification (passed in thread #%lu)!\n", |
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(long) pthread_self(), i, |
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(long) args->main_thread); |
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ERR_print_errors_fp(stdout); |
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failure(); |
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continue; |
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} |
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if (print) { |
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fprintf(stderr, ">%d\n", i); |
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} |
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} |
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free(signature); |
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|
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pthread_exit(0); |
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|
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return NULL; |
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} |
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|
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unsigned char * |
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xmemdup(unsigned char *s, size_t len) |
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{ |
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unsigned char *r; |
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r = malloc(len); |
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if (r == NULL) { |
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fprintf(stderr, "Out of memory.\n"); |
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ERR_print_errors_fp(stdout); |
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assert(r != NULL); |
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} |
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memcpy(r, s, len); |
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return r; |
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} |
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|
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int |
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main(int argc, char **argv) |
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{ |
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RSA *rsa; |
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MD5_CTX md5; |
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int fd, i; |
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pthread_t threads[MAX_THREAD_COUNT]; |
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int thread_count = 1000; |
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unsigned char *message, *digest; |
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unsigned int message_len, digest_len; |
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unsigned char *correct_signature; |
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unsigned int correct_siglen, ret; |
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struct thread_args master_args, *args; |
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int sync = 0, seed = 0; |
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int again = 1; |
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#ifdef USE_ENGINE |
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char *engine = NULL; |
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ENGINE *e = NULL; |
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#endif |
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|
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pthread_mutex_init(&failure_count_lock, NULL); |
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|
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for (i = 1; i < argc; i++) { |
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if (strcmp(argv[i], "--seed") == 0) { |
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printf("Seeding PRNG.\n"); |
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seed++; |
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} else |
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if (strcmp(argv[i], "--sync") == 0) { |
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printf("Running synchronized.\n"); |
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sync++; |
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} else |
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if ((strcmp(argv[i], "--threads") == 0) && (i < argc - 1)) { |
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i++; |
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thread_count = atol(argv[i]); |
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if (thread_count > MAX_THREAD_COUNT) { |
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thread_count = MAX_THREAD_COUNT; |
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} |
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printf("Starting %d threads.\n", thread_count); |
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sync++; |
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} else |
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if (strcmp(argv[i], "--sign") == 0) { |
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printf("Locking signing.\n"); |
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locked_sign++; |
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} else |
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if (strcmp(argv[i], "--verify") == 0) { |
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printf("Locking verifies.\n"); |
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locked_verify++; |
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} else |
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if (strcmp(argv[i], "--print") == 0) { |
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printf("Tracing.\n"); |
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print++; |
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#ifdef USE_ENGINE |
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} else |
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if ((strcmp(argv[i], "--engine") == 0) && (i < argc - 1)) { |
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printf("Using engine \"%s\".\n", argv[i + 1]); |
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engine = argv[i + 1]; |
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i++; |
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#endif |
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} else { |
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printf("Bad argument: %s\n", argv[i]); |
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return 1; |
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} |
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} |
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|
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/* Get some random data to sign. */ |
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fd = open("/dev/urandom", O_RDONLY); |
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if (fd == -1) { |
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fprintf(stderr, "Error opening /dev/urandom: %s\n", |
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strerror(errno)); |
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} |
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|
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if (print) { |
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fprintf(stderr, "Reading random data.\n"); |
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} |
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message = malloc(message_len = 9371); |
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read(fd, message, message_len); |
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close(fd); |
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|
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/* Initialize the SSL library and set up thread-safe locking. */ |
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ERR_load_crypto_strings(); |
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SSL_library_init(); |
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mutex_locks = malloc(sizeof(pthread_mutex_t) * CRYPTO_num_locks()); |
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for (i = 0; i < CRYPTO_num_locks(); i++) { |
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pthread_mutex_init(&mutex_locks[i], NULL); |
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} |
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CRYPTO_set_id_callback(thread_id_cb); |
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CRYPTO_set_locking_callback(lock_cb); |
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ERR_print_errors_fp(stdout); |
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|
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/* Seed the PRNG if we were asked to do so. */ |
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if (seed) { |
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if (print) { |
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fprintf(stderr, "Seeding PRNG.\n"); |
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} |
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RAND_add(message, message_len, message_len); |
| 257 |
ERR_print_errors_fp(stdout); |
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} |
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|
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/* Turn on a hardware crypto device if asked to do so. */ |
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#ifdef USE_ENGINE |
| 262 |
if (engine) { |
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#if OPENSSL_VERSION_NUMBER >= 0x0090700fL |
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ENGINE_load_builtin_engines(); |
| 265 |
#endif |
| 266 |
if (print) { |
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fprintf(stderr, "Initializing \"%s\" engine.\n", |
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engine); |
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} |
| 270 |
e = ENGINE_by_id(engine); |
| 271 |
ERR_print_errors_fp(stdout); |
| 272 |
if (e) { |
| 273 |
i = ENGINE_init(e); |
| 274 |
ERR_print_errors_fp(stdout); |
| 275 |
i = ENGINE_set_default_RSA(e); |
| 276 |
ERR_print_errors_fp(stdout); |
| 277 |
} |
| 278 |
} |
| 279 |
#endif |
| 280 |
|
| 281 |
/* Compute the digest for the signature. */ |
| 282 |
if (print) { |
| 283 |
fprintf(stderr, "Computing digest.\n"); |
| 284 |
} |
| 285 |
digest = malloc(digest_len = MD5_DIGEST_LENGTH); |
| 286 |
MD5_Init(&md5); |
| 287 |
MD5_Update(&md5, message, message_len); |
| 288 |
MD5_Final(digest, &md5); |
| 289 |
|
| 290 |
/* Generate a signing key. */ |
| 291 |
if (print) { |
| 292 |
fprintf(stderr, "Generating key.\n"); |
| 293 |
} |
| 294 |
rsa = RSA_generate_key(4096, 3, NULL, NULL); |
| 295 |
ERR_print_errors_fp(stdout); |
| 296 |
if (rsa == NULL) { |
| 297 |
_exit(1); |
| 298 |
} |
| 299 |
|
| 300 |
/* Sign the data. */ |
| 301 |
correct_siglen = RSA_size(rsa); |
| 302 |
correct_signature = malloc(correct_siglen); |
| 303 |
for (i = 0; i < MAIN_COUNT; i++) { |
| 304 |
if (print) { |
| 305 |
fprintf(stderr, "Signing data (%d).\n", i); |
| 306 |
} |
| 307 |
ret = RSA_check_key(rsa); |
| 308 |
ERR_print_errors_fp(stdout); |
| 309 |
if (ret != 1) { |
| 310 |
failure(); |
| 311 |
} |
| 312 |
correct_siglen = RSA_size(rsa); |
| 313 |
ret = RSA_sign(NID_md5, digest, digest_len, |
| 314 |
correct_signature, &correct_siglen, |
| 315 |
rsa); |
| 316 |
ERR_print_errors_fp(stdout); |
| 317 |
if (ret != 1) { |
| 318 |
_exit(2); |
| 319 |
} |
| 320 |
if (print) { |
| 321 |
fprintf(stderr, "Verifying data (%d).\n", i); |
| 322 |
} |
| 323 |
ret = RSA_verify(NID_md5, digest, digest_len, |
| 324 |
correct_signature, correct_siglen, |
| 325 |
rsa); |
| 326 |
if (ret != 1) { |
| 327 |
_exit(2); |
| 328 |
} |
| 329 |
} |
| 330 |
|
| 331 |
/* Collect up the inforamtion which other threads will need for |
| 332 |
* comparing their signature results with ours. */ |
| 333 |
master_args.rsa = rsa; |
| 334 |
master_args.digest_type = NID_md5; |
| 335 |
master_args.digest = digest; |
| 336 |
master_args.digest_len = digest_len; |
| 337 |
master_args.signature = correct_signature; |
| 338 |
master_args.signature_len = correct_siglen; |
| 339 |
master_args.main_thread = pthread_self(); |
| 340 |
|
| 341 |
fprintf(stdout, "Performing %d signatures in each of %d threads " |
| 342 |
"(%d, %d).\n", ITERATION_COUNT, thread_count, |
| 343 |
digest_len, correct_siglen); |
| 344 |
fflush(NULL); |
| 345 |
|
| 346 |
/* Start up all of the threads. */ |
| 347 |
for (i = 0; i < thread_count; i++) { |
| 348 |
args = malloc(sizeof(struct thread_args)); |
| 349 |
args->rsa = RSAPrivateKey_dup(master_args.rsa); |
| 350 |
args->digest_type = master_args.digest_type; |
| 351 |
args->digest_len = master_args.digest_len; |
| 352 |
args->digest = xmemdup(master_args.digest, args->digest_len); |
| 353 |
args->signature_len = master_args.signature_len; |
| 354 |
args->signature = xmemdup(master_args.signature, |
| 355 |
args->signature_len); |
| 356 |
args->main_thread = pthread_self(); |
| 357 |
ret = pthread_create(&threads[i], NULL, thread_main, args); |
| 358 |
while ((ret != 0) && (errno == EAGAIN)) { |
| 359 |
ret = pthread_create(&threads[i], NULL, |
| 360 |
thread_main, &args); |
| 361 |
fprintf(stderr, "Thread limit hit at %d.\n", i); |
| 362 |
} |
| 363 |
if (ret != 0) { |
| 364 |
fprintf(stderr, "Unable to create thread %d: %s.\n", |
| 365 |
i, strerror(errno)); |
| 366 |
threads[i] = -1; |
| 367 |
} else { |
| 368 |
if (sync) { |
| 369 |
ret = pthread_join(threads[i], NULL); |
| 370 |
assert(ret == 0); |
| 371 |
} |
| 372 |
if (print) { |
| 373 |
fprintf(stderr, "%d\n", i); |
| 374 |
} |
| 375 |
} |
| 376 |
} |
| 377 |
|
| 378 |
/* Wait for all threads to complete. So long as we can find an |
| 379 |
* unjoined thread, keep joining threads. */ |
| 380 |
do { |
| 381 |
again = 0; |
| 382 |
for (i = 0; i < thread_count; i++) { |
| 383 |
/* If we have an unterminated thread, join it. */ |
| 384 |
if (threads[i] != -1) { |
| 385 |
again = 1; |
| 386 |
if (print) { |
| 387 |
fprintf(stderr, "Joining thread %d.\n", |
| 388 |
i); |
| 389 |
} |
| 390 |
pthread_join(threads[i], NULL); |
| 391 |
threads[i] = -1; |
| 392 |
break; |
| 393 |
} |
| 394 |
} |
| 395 |
} while (again == 1); |
| 396 |
|
| 397 |
fprintf(stderr, "%ld failures\n", failure_count); |
| 398 |
|
| 399 |
return (failure_count != 0); |
| 400 |
} |
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