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Code Activity

buffer: adapt dh.c to new ssh_buffer_(un)pack()

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Reviewed-by: Andreas Schneider <asn@samba.org>
This commit is contained in:
Aris Adamantiadis
2014-04-10 17:47:16 +02:00
committed by Andreas Schneider
parent cb10ad0c84
commit 1dd95675df
1 changed files with 39 additions and 95 deletions
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134
src/dh.c
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@@ -504,10 +504,6 @@ int ssh_client_dh_init(ssh_session session){
ssh_string e = NULL; ssh_string e = NULL;
int rc; int rc;
if (buffer_add_u8(session->out_buffer, SSH2_MSG_KEXDH_INIT) < 0) {
goto error;
}
if (dh_generate_x(session) < 0) { if (dh_generate_x(session) < 0) {
goto error; goto error;
} }
@@ -520,9 +516,11 @@ int ssh_client_dh_init(ssh_session session){
goto error; goto error;
} }
if (buffer_add_ssh_string(session->out_buffer, e) < 0) { rc = ssh_buffer_pack(session->out_buffer, "bS", SSH2_MSG_KEXDH_INIT, e);
if (rc != SSH_OK) {
goto error; goto error;
} }
ssh_string_burn(e); ssh_string_burn(e);
ssh_string_free(e); ssh_string_free(e);
e=NULL; e=NULL;
@@ -589,11 +587,9 @@ error:
int make_sessionid(ssh_session session) { int make_sessionid(ssh_session session) {
ssh_string num = NULL; ssh_string num = NULL;
ssh_string str = NULL;
ssh_buffer server_hash = NULL; ssh_buffer server_hash = NULL;
ssh_buffer client_hash = NULL; ssh_buffer client_hash = NULL;
ssh_buffer buf = NULL; ssh_buffer buf = NULL;
uint32_t len;
int rc = SSH_ERROR; int rc = SSH_ERROR;
buf = ssh_buffer_new(); buf = ssh_buffer_new();
@@ -601,24 +597,11 @@ int make_sessionid(ssh_session session) {
return rc; return rc;
} }
str = ssh_string_from_char(session->clientbanner); rc = ssh_buffer_pack(buf,
if (str == NULL) { "ss",
goto error; session->clientbanner,
} session->serverbanner);
if (rc == SSH_ERROR) {
rc = buffer_add_ssh_string(buf, str);
if (rc < 0) {
goto error;
}
ssh_string_free(str);
str = ssh_string_from_char(session->serverbanner);
if (str == NULL) {
goto error;
}
rc = buffer_add_ssh_string(buf, str);
if (rc < 0) {
goto error; goto error;
} }
@@ -657,61 +640,30 @@ int make_sessionid(ssh_session session) {
} }
} }
len = ntohl(buffer_get_rest_len(client_hash)); rc = ssh_buffer_pack(buf,
rc = buffer_add_u32(buf,len); "dPdPS",
if (rc < 0) { buffer_get_rest_len(client_hash),
goto error; buffer_get_rest_len(client_hash),
} buffer_get_rest(client_hash),
rc = ssh_buffer_add_data(buf, buffer_get_rest(client_hash), buffer_get_rest_len(server_hash),
buffer_get_rest_len(client_hash)); buffer_get_rest_len(server_hash),
if (rc < 0) { buffer_get_rest(server_hash),
goto error; session->next_crypto->server_pubkey);
}
len = ntohl(buffer_get_rest_len(server_hash)); if(rc != SSH_OK){
rc = buffer_add_u32(buf, len);
if (rc < 0) {
goto error;
}
rc = ssh_buffer_add_data(buf, buffer_get_rest(server_hash),
buffer_get_rest_len(server_hash));
if (rc < 0) {
goto error;
}
len = ssh_string_len(session->next_crypto->server_pubkey) + 4;
rc = ssh_buffer_add_data(buf, session->next_crypto->server_pubkey, len);
if (rc < 0) {
goto error; goto error;
} }
if (session->next_crypto->kex_type == SSH_KEX_DH_GROUP1_SHA1 || if (session->next_crypto->kex_type == SSH_KEX_DH_GROUP1_SHA1 ||
session->next_crypto->kex_type == SSH_KEX_DH_GROUP14_SHA1) { session->next_crypto->kex_type == SSH_KEX_DH_GROUP14_SHA1) {
rc = ssh_buffer_pack(buf,
num = make_bignum_string(session->next_crypto->e); "BB",
if (num == NULL) { session->next_crypto->e,
session->next_crypto->f);
if (rc != SSH_OK) {
goto error; goto error;
} }
len = ssh_string_len(num) + 4;
rc = ssh_buffer_add_data(buf, num, len);
if (rc < 0) {
goto error;
}
ssh_string_free(num);
num = make_bignum_string(session->next_crypto->f);
if (num == NULL) {
goto error;
}
len = ssh_string_len(num) + 4;
rc = ssh_buffer_add_data(buf, num, len);
if (rc < 0) {
goto error;
}
ssh_string_free(num);
#ifdef HAVE_ECDH #ifdef HAVE_ECDH
} else if (session->next_crypto->kex_type == SSH_KEX_ECDH_SHA2_NISTP256) { } else if (session->next_crypto->kex_type == SSH_KEX_ECDH_SHA2_NISTP256) {
if (session->next_crypto->ecdh_client_pubkey == NULL || if (session->next_crypto->ecdh_client_pubkey == NULL ||
@@ -719,37 +671,30 @@ int make_sessionid(ssh_session session) {
SSH_LOG(SSH_LOG_WARNING, "ECDH parameted missing"); SSH_LOG(SSH_LOG_WARNING, "ECDH parameted missing");
goto error; goto error;
} }
rc = buffer_add_ssh_string(buf,session->next_crypto->ecdh_client_pubkey); rc = ssh_buffer_pack(buf,
if (rc < 0) { "SS",
goto error; session->next_crypto->ecdh_client_pubkey,
} session->next_crypto->ecdh_server_pubkey);
rc = buffer_add_ssh_string(buf,session->next_crypto->ecdh_server_pubkey); if (rc != SSH_OK) {
if (rc < 0) {
goto error; goto error;
} }
#endif #endif
#ifdef HAVE_CURVE25519 #ifdef HAVE_CURVE25519
} else if (session->next_crypto->kex_type == SSH_KEX_CURVE25519_SHA256_LIBSSH_ORG) { } else if (session->next_crypto->kex_type == SSH_KEX_CURVE25519_SHA256_LIBSSH_ORG) {
rc = buffer_add_u32(buf, htonl(CURVE25519_PUBKEY_SIZE)); rc = ssh_buffer_pack(buf,
rc += ssh_buffer_add_data(buf, session->next_crypto->curve25519_client_pubkey, "dPdP",
CURVE25519_PUBKEY_SIZE); CURVE25519_PUBKEY_SIZE,
rc += buffer_add_u32(buf, htonl(CURVE25519_PUBKEY_SIZE)); session->next_crypto->curve25519_client_pubkey,
rc += ssh_buffer_add_data(buf, session->next_crypto->curve25519_server_pubkey, CURVE25519_PUBKEY_SIZE,
CURVE25519_PUBKEY_SIZE); session->next_crypto->curve25519_server_pubkey);
if (rc != SSH_OK) { if (rc != SSH_OK) {
goto error; goto error;
} }
#endif #endif
} }
rc = ssh_buffer_pack(buf, "B", session->next_crypto->k);
num = make_bignum_string(session->next_crypto->k); if (rc != SSH_OK) {
if (num == NULL) {
goto error;
}
len = ssh_string_len(num) + 4;
rc = ssh_buffer_add_data(buf, num, len);
if (rc < 0) {
goto error; goto error;
} }
@@ -811,7 +756,6 @@ error:
session->in_hashbuf = NULL; session->in_hashbuf = NULL;
session->out_hashbuf = NULL; session->out_hashbuf = NULL;
ssh_string_free(str);
ssh_string_free(num); ssh_string_free(num);
return rc; return rc;