lib/libssh
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Add key validation in server side authentication

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This commit is contained in:
Aris Adamantiadis
2009-12-20 18:05:02 +01:00
parent 6509b6e742
commit 2e22d6ef99
4 changed files with 20 additions and 5 deletions
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7
include/libssh/libssh.h
View File

@@ -186,6 +186,13 @@ enum ssh_channel_requests_e {
SSH_CHANNEL_REQUEST_WINDOW_CHANGE,
};
enum ssh_publickey_state_e {
SSH_PUBLICKEY_STATE_ERROR=-1,
SSH_PUBLICKEY_STATE_NONE=0,
SSH_PUBLICKEY_STATE_VALID=1,
SSH_PUBLICKEY_STATE_WRONG=2
};
/* status flags */
#define SSH_CLOSED 0x01
#define SSH_READ_PENDING 0x02

1
include/libssh/server.h
View File

@@ -148,6 +148,7 @@ LIBSSH_API int ssh_message_reply_default(ssh_message msg);
LIBSSH_API char *ssh_message_auth_user(ssh_message msg);
LIBSSH_API char *ssh_message_auth_password(ssh_message msg);
LIBSSH_API ssh_public_key ssh_message_auth_publickey(ssh_message msg);
LIBSSH_API enum ssh_publickey_state_e ssh_message_auth_publickey_state(ssh_message msg);
LIBSSH_API int ssh_message_auth_reply_success(ssh_message msg,int partial);
LIBSSH_API int ssh_message_auth_reply_pk_ok(ssh_message msg, ssh_string algo, ssh_string pubkey);
LIBSSH_API int ssh_message_auth_set_methods(ssh_message msg, int methods);

10
libssh/messages.c
View File

@@ -220,7 +220,7 @@ static ssh_message handle_userauth_request(ssh_session session){
if (msg->auth_request.public_key == NULL) {
goto error;
}
msg->auth_request.signature_state = 0;
msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_NONE;
// has a valid signature ?
if(has_sign) {
SIGNATURE *signature = NULL;
@@ -231,7 +231,7 @@ static ssh_message handle_userauth_request(ssh_session session){
sign = buffer_get_ssh_string(session->in_buffer);
if(sign == NULL) {
ssh_log(session, SSH_LOG_PACKET, "Invalid signature packet from peer");
msg->auth_request.signature_state = -2;
msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_ERROR;
goto error;
}
signature = signature_from_string(session, sign, public_key,
@@ -241,7 +241,7 @@ static ssh_message handle_userauth_request(ssh_session session){
(digest != NULL && signature != NULL &&
sig_verify(session, public_key, signature,
buffer_get(digest), buffer_get_len(digest)) < 0)) {
ssh_log(session, SSH_LOG_PACKET, "Invalid signature from peer");
ssh_log(session, SSH_LOG_PACKET, "Wrong signature from peer");
string_free(sign);
sign = NULL;
@@ -250,7 +250,7 @@ static ssh_message handle_userauth_request(ssh_session session){
signature_free(signature);
signature = NULL;
msg->auth_request.signature_state = -1;
msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_WRONG;
goto error;
}
else
@@ -263,7 +263,7 @@ static ssh_message handle_userauth_request(ssh_session session){
signature_free(signature);
signature = NULL;
msg->auth_request.signature_state = 1;
msg->auth_request.signature_state = SSH_PUBLICKEY_STATE_VALID;
}
SAFE_FREE(service_c);
leave_function();

7
libssh/server.c
View File

@@ -760,6 +760,13 @@ ssh_public_key ssh_message_auth_publickey(ssh_message msg){
return msg->auth_request.public_key;
}
enum ssh_publickey_state_e ssh_message_auth_publickey_state(ssh_message msg){
if (msg == NULL) {
return -1;
}
return msg->auth_request.signature_state;
}
int ssh_message_auth_set_methods(ssh_message msg, int methods) {
if (msg == NULL || msg->session == NULL) {
return -1;