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-rw-r--r--include/libssh/wrapper.h1
-rw-r--r--src/bind.c2
-rw-r--r--src/libcrypto.c9
-rw-r--r--src/libgcrypt.c3
4 files changed, 15 insertions, 0 deletions
diff --git a/include/libssh/wrapper.h b/include/libssh/wrapper.h
index 7374a88a..e8ff32c1 100644
--- a/include/libssh/wrapper.h
+++ b/include/libssh/wrapper.h
@@ -70,5 +70,6 @@ int crypt_set_algorithms_server(ssh_session session);
struct ssh_crypto_struct *crypto_new(void);
void crypto_free(struct ssh_crypto_struct *crypto);
+void ssh_reseed(void);
#endif /* WRAPPER_H_ */
diff --git a/src/bind.c b/src/bind.c
index 8d82d0d4..03d34031 100644
--- a/src/bind.c
+++ b/src/bind.c
@@ -458,6 +458,8 @@ int ssh_bind_accept_fd(ssh_bind sshbind, ssh_session session, socket_t fd){
return SSH_ERROR;
}
}
+ /* force PRNG to change state in case we fork after ssh_bind_accept */
+ ssh_reseed();
return SSH_OK;
}
diff --git a/src/libcrypto.c b/src/libcrypto.c
index bb1d96ad..d8cc795c 100644
--- a/src/libcrypto.c
+++ b/src/libcrypto.c
@@ -23,6 +23,7 @@
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <sys/time.h>
#include "libssh/priv.h"
#include "libssh/session.h"
@@ -38,6 +39,8 @@
#include <openssl/rsa.h>
#include <openssl/hmac.h>
#include <openssl/opensslv.h>
+#include <openssl/rand.h>
+
#ifdef HAVE_OPENSSL_AES_H
#define HAS_AES
#include <openssl/aes.h>
@@ -74,6 +77,12 @@ static int alloc_key(struct ssh_cipher_struct *cipher) {
return 0;
}
+void ssh_reseed(void){
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ RAND_add(&tv, sizeof(tv), 0.0);
+}
+
SHACTX sha1_init(void) {
SHACTX c = malloc(sizeof(*c));
if (c == NULL) {
diff --git a/src/libgcrypt.c b/src/libgcrypt.c
index 899bccdf..46179016 100644
--- a/src/libgcrypt.c
+++ b/src/libgcrypt.c
@@ -45,6 +45,9 @@ static int alloc_key(struct ssh_cipher_struct *cipher) {
return 0;
}
+void ssh_reseed(void){
+ }
+
SHACTX sha1_init(void) {
SHACTX ctx = NULL;
gcry_md_open(&ctx, GCRY_MD_SHA1, 0);