#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <openssl/buffer.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include <openssl/x509.h>
#include "bytestring.h"
#include "dtls_local.h"
#include "ssl_local.h"
int
ssl3_do_write(SSL *s, int type)
{
int ret;
ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off],
s->init_num);
if (ret < 0)
return (-1);
if (type == SSL3_RT_HANDSHAKE)
tls1_transcript_record(s,
(unsigned char *)&s->init_buf->data[s->init_off], ret);
if (ret == s->init_num) {
ssl_msg_callback(s, 1, type, s->init_buf->data,
(size_t)(s->init_off + s->init_num));
return (1);
}
s->init_off += ret;
s->init_num -= ret;
return (0);
}
static int
ssl3_add_cert(CBB *cbb, X509 *x)
{
unsigned char *data;
int cert_len;
int ret = 0;
CBB cert;
if ((cert_len = i2d_X509(x, NULL)) < 0)
goto err;
if (!CBB_add_u24_length_prefixed(cbb, &cert))
goto err;
if (!CBB_add_space(&cert, &data, cert_len))
goto err;
if (i2d_X509(x, &data) < 0)
goto err;
if (!CBB_flush(cbb))
goto err;
ret = 1;
err:
return (ret);
}
int
ssl3_output_cert_chain(SSL *s, CBB *cbb, SSL_CERT_PKEY *cpk)
{
X509_STORE_CTX *xs_ctx = NULL;
STACK_OF(X509) *chain;
CBB cert_list;
X509 *x;
int ret = 0;
int i;
if (!CBB_add_u24_length_prefixed(cbb, &cert_list))
goto err;
if (cpk == NULL)
goto done;
if ((chain = cpk->chain) == NULL)
chain = s->ctx->extra_certs;
if (chain != NULL || (s->mode & SSL_MODE_NO_AUTO_CHAIN)) {
if (!ssl3_add_cert(&cert_list, cpk->x509))
goto err;
} else {
if ((xs_ctx = X509_STORE_CTX_new()) == NULL)
goto err;
if (!X509_STORE_CTX_init(xs_ctx, s->ctx->cert_store,
cpk->x509, NULL)) {
SSLerror(s, ERR_R_X509_LIB);
goto err;
}
X509_VERIFY_PARAM_set_flags(X509_STORE_CTX_get0_param(xs_ctx),
X509_V_FLAG_LEGACY_VERIFY);
X509_verify_cert(xs_ctx);
ERR_clear_error();
chain = X509_STORE_CTX_get0_chain(xs_ctx);
}
for (i = 0; i < sk_X509_num(chain); i++) {
x = sk_X509_value(chain, i);
if (!ssl3_add_cert(&cert_list, x))
goto err;
}
done:
if (!CBB_flush(cbb))
goto err;
ret = 1;
err:
X509_STORE_CTX_free(xs_ctx);
return (ret);
}
int
ssl3_get_message(SSL *s, int st1, int stn, int mt, long max)
{
unsigned char *p;
uint32_t l;
long n;
int i, al;
CBS cbs;
uint8_t u8;
if (SSL_is_dtls(s))
return dtls1_get_message(s, st1, stn, mt, max);
if (s->s3->hs.tls12.reuse_message) {
s->s3->hs.tls12.reuse_message = 0;
if ((mt >= 0) && (s->s3->hs.tls12.message_type != mt)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
goto fatal_err;
}
s->init_msg = s->init_buf->data +
SSL3_HM_HEADER_LENGTH;
s->init_num = (int)s->s3->hs.tls12.message_size;
return 1;
}
p = (unsigned char *)s->init_buf->data;
if (s->s3->hs.state == st1) {
int skip_message;
do {
while (s->init_num < SSL3_HM_HEADER_LENGTH) {
i = s->method->ssl_read_bytes(s,
SSL3_RT_HANDSHAKE, &p[s->init_num],
SSL3_HM_HEADER_LENGTH - s->init_num, 0);
if (i <= 0) {
s->rwstate = SSL_READING;
return i;
}
s->init_num += i;
}
skip_message = 0;
if (!s->server && p[0] == SSL3_MT_HELLO_REQUEST) {
if (p[1] == 0 && p[2] == 0 &&p[3] == 0) {
s->init_num = 0;
skip_message = 1;
ssl_msg_callback(s, 0,
SSL3_RT_HANDSHAKE, p,
SSL3_HM_HEADER_LENGTH);
}
}
} while (skip_message);
if ((mt >= 0) && (*p != mt)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerror(s, SSL_R_UNEXPECTED_MESSAGE);
goto fatal_err;
}
CBS_init(&cbs, p, SSL3_HM_HEADER_LENGTH);
if (!CBS_get_u8(&cbs, &u8) ||
!CBS_get_u24(&cbs, &l)) {
SSLerror(s, ERR_R_BUF_LIB);
goto err;
}
s->s3->hs.tls12.message_type = u8;
if (l > (unsigned long)max) {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerror(s, SSL_R_EXCESSIVE_MESSAGE_SIZE);
goto fatal_err;
}
if (l && !BUF_MEM_grow_clean(s->init_buf,
l + SSL3_HM_HEADER_LENGTH)) {
SSLerror(s, ERR_R_BUF_LIB);
goto err;
}
s->s3->hs.tls12.message_size = l;
s->s3->hs.state = stn;
s->init_msg = s->init_buf->data +
SSL3_HM_HEADER_LENGTH;
s->init_num = 0;
}
p = s->init_msg;
n = s->s3->hs.tls12.message_size - s->init_num;
while (n > 0) {
i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
&p[s->init_num], n, 0);
if (i <= 0) {
s->rwstate = SSL_READING;
return i;
}
s->init_num += i;
n -= i;
}
tls1_transcript_record(s, (unsigned char *)s->init_buf->data,
s->init_num + SSL3_HM_HEADER_LENGTH);
ssl_msg_callback(s, 0, SSL3_RT_HANDSHAKE, s->init_buf->data,
(size_t)s->init_num + SSL3_HM_HEADER_LENGTH);
return 1;
fatal_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
err:
return -1;
}
int
ssl_cert_type(EVP_PKEY *pkey)
{
if (pkey == NULL)
return -1;
switch (EVP_PKEY_id(pkey)) {
case EVP_PKEY_EC:
return SSL_PKEY_ECC;
case EVP_PKEY_RSA:
case EVP_PKEY_RSA_PSS:
return SSL_PKEY_RSA;
}
return -1;
}
int
ssl_verify_alarm_type(long type)
{
int al;
switch (type) {
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
case X509_V_ERR_UNABLE_TO_GET_CRL:
case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
al = SSL_AD_UNKNOWN_CA;
break;
case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
case X509_V_ERR_CERT_NOT_YET_VALID:
case X509_V_ERR_CRL_NOT_YET_VALID:
case X509_V_ERR_CERT_UNTRUSTED:
case X509_V_ERR_CERT_REJECTED:
al = SSL_AD_BAD_CERTIFICATE;
break;
case X509_V_ERR_CERT_SIGNATURE_FAILURE:
case X509_V_ERR_CRL_SIGNATURE_FAILURE:
al = SSL_AD_DECRYPT_ERROR;
break;
case X509_V_ERR_CERT_HAS_EXPIRED:
case X509_V_ERR_CRL_HAS_EXPIRED:
al = SSL_AD_CERTIFICATE_EXPIRED;
break;
case X509_V_ERR_CERT_REVOKED:
al = SSL_AD_CERTIFICATE_REVOKED;
break;
case X509_V_ERR_OUT_OF_MEM:
al = SSL_AD_INTERNAL_ERROR;
break;
case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
case X509_V_ERR_CERT_CHAIN_TOO_LONG:
case X509_V_ERR_PATH_LENGTH_EXCEEDED:
case X509_V_ERR_INVALID_CA:
al = SSL_AD_UNKNOWN_CA;
break;
case X509_V_ERR_APPLICATION_VERIFICATION:
al = SSL_AD_HANDSHAKE_FAILURE;
break;
case X509_V_ERR_INVALID_PURPOSE:
al = SSL_AD_UNSUPPORTED_CERTIFICATE;
break;
default:
al = SSL_AD_CERTIFICATE_UNKNOWN;
break;
}
return (al);
}
int
ssl3_setup_init_buffer(SSL *s)
{
BUF_MEM *buf = NULL;
if (s->init_buf != NULL)
return (1);
if ((buf = BUF_MEM_new()) == NULL)
goto err;
if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH))
goto err;
s->init_buf = buf;
return (1);
err:
BUF_MEM_free(buf);
return (0);
}
void
ssl3_release_init_buffer(SSL *s)
{
BUF_MEM_free(s->init_buf);
s->init_buf = NULL;
s->init_msg = NULL;
s->init_num = 0;
s->init_off = 0;
}
int
ssl3_setup_read_buffer(SSL *s)
{
unsigned char *p;
size_t len, align, headerlen;
if (SSL_is_dtls(s))
headerlen = DTLS1_RT_HEADER_LENGTH;
else
headerlen = SSL3_RT_HEADER_LENGTH;
align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
if (s->s3->rbuf.buf == NULL) {
len = SSL3_RT_MAX_PLAIN_LENGTH +
SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
if ((p = calloc(1, len)) == NULL)
goto err;
s->s3->rbuf.buf = p;
s->s3->rbuf.len = len;
}
s->packet = s->s3->rbuf.buf;
return 1;
err:
SSLerror(s, ERR_R_MALLOC_FAILURE);
return 0;
}
int
ssl3_setup_write_buffer(SSL *s)
{
size_t len, align, headerlen;
if (SSL_is_dtls(s))
headerlen = DTLS1_RT_HEADER_LENGTH + 1;
else
headerlen = SSL3_RT_HEADER_LENGTH;
align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
if (s->s3->wbuf.buf == NULL) {
len = s->max_send_fragment +
SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
if ((s->s3->wbuf.buf = calloc(1, len)) == NULL)
goto err;
s->s3->wbuf.len = len;
}
return 1;
err:
SSLerror(s, ERR_R_MALLOC_FAILURE);
return 0;
}
int
ssl3_setup_buffers(SSL *s)
{
if (!ssl3_setup_read_buffer(s))
return 0;
if (!ssl3_setup_write_buffer(s))
return 0;
return 1;
}
void
ssl3_release_buffer(SSL3_BUFFER_INTERNAL *b)
{
freezero(b->buf, b->len);
b->buf = NULL;
b->len = 0;
}
void
ssl3_release_read_buffer(SSL *s)
{
ssl3_release_buffer(&s->s3->rbuf);
}
void
ssl3_release_write_buffer(SSL *s)
{
ssl3_release_buffer(&s->s3->wbuf);
}
