static int SSL_SESSION_parse_u16(CBS *cbs, uint16_t *out, unsigned tag,
uint16_t default_value) {
uint64_t value;
if (!CBS_get_optional_asn1_uint64(cbs, &value, tag,
(uint64_t)default_value) ||
value > 0xffff) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
*out = (uint16_t)value;
return 1;
}
static int SSL_SESSION_parse_long(CBS *cbs, long *out, unsigned tag,
long default_value) {
uint64_t value;
if (!CBS_get_optional_asn1_uint64(cbs, &value, tag,
(uint64_t)default_value) ||
value > LONG_MAX) {
OPENSSL_PUT_ERROR(SSL, SSL_R_INVALID_SSL_SESSION);
return 0;
}
*out = (long)value;
return 1;
}
SSL_SESSION *
d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, long length)
{
CBS cbs, session, cipher_suite, session_id, master_key, peer_cert;
CBS hostname, ticket;
uint64_t version, tls_version, stime, timeout, verify_result, lifetime;
const unsigned char *peer_cert_bytes;
uint16_t cipher_value;
SSL_SESSION *s = NULL;
size_t data_len;
int present;
if (a != NULL)
s = *a;
if (s == NULL) {
if ((s = SSL_SESSION_new()) == NULL) {
SSLerrorx(ERR_R_MALLOC_FAILURE);
return (NULL);
}
}
CBS_init(&cbs, *pp, length);
if (!CBS_get_asn1(&cbs, &session, CBS_ASN1_SEQUENCE))
goto err;
/* Session ASN1 version. */
if (!CBS_get_asn1_uint64(&session, &version))
goto err;
if (version != SSL_SESSION_ASN1_VERSION)
goto err;
/* TLS/SSL Protocol Version. */
if (!CBS_get_asn1_uint64(&session, &tls_version))
goto err;
if (tls_version > INT_MAX)
goto err;
s->ssl_version = (int)tls_version;
/* Cipher suite. */
if (!CBS_get_asn1(&session, &cipher_suite, CBS_ASN1_OCTETSTRING))
goto err;
if (!CBS_get_u16(&cipher_suite, &cipher_value))
goto err;
if (CBS_len(&cipher_suite) != 0)
goto err;
/* XXX - populate cipher instead? */
s->cipher = NULL;
s->cipher_id = SSL3_CK_ID | cipher_value;
/* Session ID. */
if (!CBS_get_asn1(&session, &session_id, CBS_ASN1_OCTETSTRING))
goto err;
if (!CBS_write_bytes(&session_id, s->session_id, sizeof(s->session_id),
&data_len))
goto err;
if (data_len > UINT_MAX)
goto err;
s->session_id_length = (unsigned int)data_len;
/* Master key. */
if (!CBS_get_asn1(&session, &master_key, CBS_ASN1_OCTETSTRING))
goto err;
if (!CBS_write_bytes(&master_key, s->master_key, sizeof(s->master_key),
&data_len))
goto err;
if (data_len > INT_MAX)
goto err;
s->master_key_length = (int)data_len;
/* Time [1]. */
s->time = time(NULL);
if (!CBS_get_optional_asn1_uint64(&session, &stime, SSLASN1_TIME_TAG,
0))
goto err;
if (stime > time_max())
goto err;
if (stime != 0)
s->time = (time_t)stime;
/* Timeout [2]. */
s->timeout = 3;
if (!CBS_get_optional_asn1_uint64(&session, &timeout,
SSLASN1_TIMEOUT_TAG, 0))
goto err;
if (timeout > LONG_MAX)
goto err;
if (timeout != 0)
s->timeout = (long)timeout;
/* Peer certificate [3]. */
X509_free(s->peer);
s->peer = NULL;
if (!CBS_get_optional_asn1(&session, &peer_cert, &present,
SSLASN1_PEER_CERT_TAG))
goto err;
if (present) {
data_len = CBS_len(&peer_cert);
if (data_len > LONG_MAX)
goto err;
peer_cert_bytes = CBS_data(&peer_cert);
if (d2i_X509(&s->peer, &peer_cert_bytes,
(long)data_len) == NULL)
goto err;
}
/* Session ID context [4]. */
s->sid_ctx_length = 0;
if (!CBS_get_optional_asn1_octet_string(&session, &session_id, &present,
SSLASN1_SESSION_ID_CTX_TAG))
goto err;
if (present) {
if (!CBS_write_bytes(&session_id, (uint8_t *)&s->sid_ctx,
sizeof(s->sid_ctx), &data_len))
goto err;
if (data_len > UINT_MAX)
goto err;
s->sid_ctx_length = (unsigned int)data_len;
}
/* Verify result [5]. */
s->verify_result = X509_V_OK;
if (!CBS_get_optional_asn1_uint64(&session, &verify_result,
SSLASN1_VERIFY_RESULT_TAG, X509_V_OK))
goto err;
if (verify_result > LONG_MAX)
goto err;
s->verify_result = (long)verify_result;
/* Hostname [6]. */
free(s->tlsext_hostname);
s->tlsext_hostname = NULL;
if (!CBS_get_optional_asn1_octet_string(&session, &hostname, &present,
SSLASN1_HOSTNAME_TAG))
goto err;
if (present) {
if (CBS_contains_zero_byte(&hostname))
goto err;
if (!CBS_strdup(&hostname, &s->tlsext_hostname))
goto err;
}
/* PSK identity hint [7]. */
/* PSK identity [8]. */
/* Ticket lifetime [9]. */
s->tlsext_tick_lifetime_hint = 0;
/* XXX - tlsext_ticklen is not yet set... */
if (s->tlsext_ticklen > 0 && s->session_id_length > 0)
s->tlsext_tick_lifetime_hint = -1;
if (!CBS_get_optional_asn1_uint64(&session, &lifetime,
SSLASN1_LIFETIME_TAG, 0))
goto err;
if (lifetime > LONG_MAX)
goto err;
if (lifetime > 0)
s->tlsext_tick_lifetime_hint = (long)lifetime;
/* Ticket [10]. */
free(s->tlsext_tick);
s->tlsext_tick = NULL;
if (!CBS_get_optional_asn1_octet_string(&session, &ticket, &present,
SSLASN1_TICKET_TAG))
goto err;
if (present) {
if (!CBS_stow(&ticket, &s->tlsext_tick, &s->tlsext_ticklen))
goto err;
}
/* Compression method [11]. */
/* SRP username [12]. */
*pp = CBS_data(&cbs);
if (a != NULL)
*a = s;
return (s);
err:
ERR_asprintf_error_data("offset=%d", (int)(CBS_data(&cbs) - *pp));
if (s != NULL && (a == NULL || *a != s))
SSL_SESSION_free(s);
return (NULL);
}
static int test_get_asn1(void) {
static const uint8_t kData1[] = {0x30, 2, 1, 2};
static const uint8_t kData2[] = {0x30, 3, 1, 2};
static const uint8_t kData3[] = {0x30, 0x80};
static const uint8_t kData4[] = {0x30, 0x81, 1, 1};
static const uint8_t kData5[] = {0x30, 0x82, 0, 1, 1};
static const uint8_t kData6[] = {0xa1, 3, 0x4, 1, 1};
static const uint8_t kData7[] = {0xa1, 3, 0x4, 2, 1};
static const uint8_t kData8[] = {0xa1, 3, 0x2, 1, 1};
static const uint8_t kData9[] = {0xa1, 3, 0x2, 1, 0xff};
CBS data, contents;
int present;
uint64_t value;
CBS_init(&data, kData1, sizeof(kData1));
if (CBS_peek_asn1_tag(&data, 0x1) ||
!CBS_peek_asn1_tag(&data, 0x30)) {
return 0;
}
if (!CBS_get_asn1(&data, &contents, 0x30) ||
CBS_len(&contents) != 2 ||
memcmp(CBS_data(&contents), "\x01\x02", 2) != 0) {
return 0;
}
CBS_init(&data, kData2, sizeof(kData2));
/* data is truncated */
if (CBS_get_asn1(&data, &contents, 0x30)) {
return 0;
}
CBS_init(&data, kData3, sizeof(kData3));
/* zero byte length of length */
if (CBS_get_asn1(&data, &contents, 0x30)) {
return 0;
}
CBS_init(&data, kData4, sizeof(kData4));
/* long form mistakenly used. */
if (CBS_get_asn1(&data, &contents, 0x30)) {
return 0;
}
CBS_init(&data, kData5, sizeof(kData5));
/* length takes too many bytes. */
if (CBS_get_asn1(&data, &contents, 0x30)) {
return 0;
}
CBS_init(&data, kData1, sizeof(kData1));
/* wrong tag. */
if (CBS_get_asn1(&data, &contents, 0x31)) {
return 0;
}
CBS_init(&data, NULL, 0);
/* peek at empty data. */
if (CBS_peek_asn1_tag(&data, 0x30)) {
return 0;
}
CBS_init(&data, NULL, 0);
/* optional elements at empty data. */
if (!CBS_get_optional_asn1(&data, &contents, &present, 0xa0) ||
present ||
!CBS_get_optional_asn1_octet_string(&data, &contents, &present, 0xa0) ||
present ||
CBS_len(&contents) != 0 ||
!CBS_get_optional_asn1_octet_string(&data, &contents, NULL, 0xa0) ||
CBS_len(&contents) != 0 ||
!CBS_get_optional_asn1_uint64(&data, &value, 0xa0, 42) ||
value != 42) {
return 0;
}
CBS_init(&data, kData6, sizeof(kData6));
/* optional element. */
if (!CBS_get_optional_asn1(&data, &contents, &present, 0xa0) ||
present ||
!CBS_get_optional_asn1(&data, &contents, &present, 0xa1) ||
!present ||
CBS_len(&contents) != 3 ||
memcmp(CBS_data(&contents), "\x04\x01\x01", 3) != 0) {
return 0;
}
CBS_init(&data, kData6, sizeof(kData6));
/* optional octet string. */
if (!CBS_get_optional_asn1_octet_string(&data, &contents, &present, 0xa0) ||
present ||
CBS_len(&contents) != 0 ||
!CBS_get_optional_asn1_octet_string(&data, &contents, &present, 0xa1) ||
!present ||
CBS_len(&contents) != 1 ||
CBS_data(&contents)[0] != 1) {
return 0;
}
CBS_init(&data, kData7, sizeof(kData7));
/* invalid optional octet string. */
if (CBS_get_optional_asn1_octet_string(&data, &contents, &present, 0xa1)) {
return 0;
}
CBS_init(&data, kData8, sizeof(kData8));
/* optional octet string. */
if (!CBS_get_optional_asn1_uint64(&data, &value, 0xa0, 42) ||
value != 42 ||
!CBS_get_optional_asn1_uint64(&data, &value, 0xa1, 42) ||
value != 1) {
return 0;
}
CBS_init(&data, kData9, sizeof(kData9));
/* invalid optional integer. */
if (CBS_get_optional_asn1_uint64(&data, &value, 0xa1, 42)) {
return 0;
}
return 1;
}