diff options
Diffstat (limited to 'crypto/rand')
| -rw-r--r-- | crypto/rand/md_rand.c | 72 |
1 files changed, 48 insertions, 24 deletions
diff --git a/crypto/rand/md_rand.c b/crypto/rand/md_rand.c index bd76e23e3deb..29e465b07524 100644 --- a/crypto/rand/md_rand.c +++ b/crypto/rand/md_rand.c @@ -266,17 +266,21 @@ static void ssleay_rand_add(const void *buf, int num, double add) j = (num - i); j = (j > MD_DIGEST_LENGTH) ? MD_DIGEST_LENGTH : j; - MD_Init(&m); - MD_Update(&m, local_md, MD_DIGEST_LENGTH); + if (!MD_Init(&m) || + !MD_Update(&m, local_md, MD_DIGEST_LENGTH)) + goto err; k = (st_idx + j) - STATE_SIZE; if (k > 0) { - MD_Update(&m, &(state[st_idx]), j - k); - MD_Update(&m, &(state[0]), k); + if (!MD_Update(&m, &(state[st_idx]), j - k) || + !MD_Update(&m, &(state[0]), k)) + goto err; } else - MD_Update(&m, &(state[st_idx]), j); + if (!MD_Update(&m, &(state[st_idx]), j)) + goto err; /* DO NOT REMOVE THE FOLLOWING CALL TO MD_Update()! */ - MD_Update(&m, buf, j); + if (!MD_Update(&m, buf, j)) + goto err; /* * We know that line may cause programs such as purify and valgrind * to complain about use of uninitialized data. The problem is not, @@ -285,8 +289,9 @@ static void ssleay_rand_add(const void *buf, int num, double add) * insecure keys. */ - MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)); - MD_Final(&m, local_md); + if (!MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)) || + !MD_Final(&m, local_md)) + goto err; md_c[1]++; buf = (const char *)buf + j; @@ -305,7 +310,6 @@ static void ssleay_rand_add(const void *buf, int num, double add) st_idx = 0; } } - EVP_MD_CTX_cleanup(&m); if (!do_not_lock) CRYPTO_w_lock(CRYPTO_LOCK_RAND); @@ -326,6 +330,9 @@ static void ssleay_rand_add(const void *buf, int num, double add) #if !defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32) assert(md_c[1] == md_count[1]); #endif + + err: + EVP_MD_CTX_cleanup(&m); } static void ssleay_rand_seed(const void *buf, int num) @@ -469,15 +476,18 @@ int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo, int lock) /* num_ceil -= MD_DIGEST_LENGTH/2 */ j = (num >= MD_DIGEST_LENGTH / 2) ? MD_DIGEST_LENGTH / 2 : num; num -= j; - MD_Init(&m); + if (!MD_Init(&m)) + goto err; #ifndef GETPID_IS_MEANINGLESS if (curr_pid) { /* just in the first iteration to save time */ - MD_Update(&m, (unsigned char *)&curr_pid, sizeof curr_pid); + if (!MD_Update(&m, (unsigned char *)&curr_pid, sizeof curr_pid)) + goto err; curr_pid = 0; } #endif - MD_Update(&m, local_md, MD_DIGEST_LENGTH); - MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)); + if (!MD_Update(&m, local_md, MD_DIGEST_LENGTH) || + !MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c))) + goto err; #ifndef PURIFY /* purify complains */ /* @@ -487,16 +497,21 @@ int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo, int lock) * builds it is not used: the removal of such a small source of * entropy has negligible impact on security. */ - MD_Update(&m, buf, j); + if (!MD_Update(&m, buf, j)) + goto err; #endif k = (st_idx + MD_DIGEST_LENGTH / 2) - st_num; if (k > 0) { - MD_Update(&m, &(state[st_idx]), MD_DIGEST_LENGTH / 2 - k); - MD_Update(&m, &(state[0]), k); - } else - MD_Update(&m, &(state[st_idx]), MD_DIGEST_LENGTH / 2); - MD_Final(&m, local_md); + if (!MD_Update(&m, &(state[st_idx]), MD_DIGEST_LENGTH / 2 - k) || + !MD_Update(&m, &(state[0]), k)) + goto err; + } else { + if (!MD_Update(&m, &(state[st_idx]), MD_DIGEST_LENGTH / 2)) + goto err; + } + if (!MD_Final(&m, local_md)) + goto err; for (i = 0; i < MD_DIGEST_LENGTH / 2; i++) { /* may compete with other threads */ @@ -508,13 +523,18 @@ int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo, int lock) } } - MD_Init(&m); - MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)); - MD_Update(&m, local_md, MD_DIGEST_LENGTH); + if (!MD_Init(&m) || + !MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)) || + !MD_Update(&m, local_md, MD_DIGEST_LENGTH)) + goto err; if (lock) CRYPTO_w_lock(CRYPTO_LOCK_RAND); - MD_Update(&m, md, MD_DIGEST_LENGTH); - MD_Final(&m, md); + if (!MD_Update(&m, md, MD_DIGEST_LENGTH) || + !MD_Final(&m, md)) { + if (lock) + CRYPTO_w_unlock(CRYPTO_LOCK_RAND); + goto err; + } if (lock) CRYPTO_w_unlock(CRYPTO_LOCK_RAND); @@ -529,6 +549,10 @@ int ssleay_rand_bytes(unsigned char *buf, int num, int pseudo, int lock) "http://www.openssl.org/support/faq.html"); return (0); } + + err: + EVP_MD_CTX_cleanup(&m); + return (0); } static int ssleay_rand_nopseudo_bytes(unsigned char *buf, int num) |