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ecdh: Check return values of buffer_add_* functions.

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This commit is contained in:
Andreas Schneider
2013-06-17 12:55:04 +02:00
parent 4255a7223c
commit f31c33bb31
1 changed files with 23 additions and 4 deletions
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27
src/ecdh.c
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@@ -59,7 +59,11 @@ int ssh_client_ecdh_init(ssh_session session){
EC_POINT_point2oct(group,pubkey,POINT_CONVERSION_UNCOMPRESSED,
ssh_string_data(client_pubkey),len,ctx);
buffer_add_ssh_string(session->out_buffer,client_pubkey);
rc = buffer_add_ssh_string(session->out_buffer,client_pubkey);
if (rc < 0) {
goto error;
}
BN_CTX_free(ctx);
session->next_crypto->ecdh_privkey = key;
session->next_crypto->ecdh_client_pubkey = client_pubkey;
@@ -221,7 +225,12 @@ int ssh_server_ecdh_init(ssh_session session, ssh_buffer packet){
session->next_crypto->ecdh_privkey = ecdh_key;
session->next_crypto->ecdh_server_pubkey = q_s_string;
buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_REPLY);
rc = buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_REPLY);
if (rc < 0) {
ssh_set_error_oom(session);
goto error;
}
/* build k and session_id */
if (ecdh_build_k(session) < 0) {
ssh_set_error(session, SSH_FATAL, "Cannot build k number");
@@ -235,9 +244,19 @@ int ssh_server_ecdh_init(ssh_session session, ssh_buffer packet){
}
/* add host's public key */
buffer_add_ssh_string(session->out_buffer, session->next_crypto->server_pubkey);
rc = buffer_add_ssh_string(session->out_buffer,
session->next_crypto->server_pubkey);
if (rc < 0) {
ssh_set_error_oom(session);
goto error;
}
/* add ecdh public key */
buffer_add_ssh_string(session->out_buffer,q_s_string);
rc = buffer_add_ssh_string(session->out_buffer, q_s_string);
if (rc < 0) {
ssh_set_error_oom(session);
goto error;
}
/* add signature blob */
sig_blob = ssh_srv_pki_do_sign_sessionid(session, privkey);
if (sig_blob == NULL) {