Add SSL_SESSION_from_bytes.
Mirrors SSL_SESSION_to_bytes. It avoids having to deal with object-reuse, the
non-size_t length parameter, and trailing data. Both it and the object-reuse
variant back onto an unexposed SSL_SESSION_parse which reads a CBS.
Note that this changes the object reuse story slightly. It's now merely an
optional output pointer that frees its old contents. No d2i_SSL_SESSION
consumer in Google that's built does reuse, much less reuse with the assumption
that the top-level object won't be overridden.
Change-Id: I5cb8522f96909bb222cab0f342423f2dd7814282
Reviewed-on: https://boringssl-review.googlesource.com/5121
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/ssl_asn1.c b/ssl/ssl_asn1.c
index d1ac1b6..709e15b 100644
--- a/ssl/ssl_asn1.c
+++ b/ssl/ssl_asn1.c
@@ -360,26 +360,27 @@
return len;
}
-/* d2i_SSL_SESSION_get_string gets an optional ASN.1 OCTET STRING
+/* SSL_SESSION_parse_string gets an optional ASN.1 OCTET STRING
* explicitly tagged with |tag| from |cbs| and saves it in |*out|. On
* entry, if |*out| is not NULL, it frees the existing contents. If
* the element was not found, it sets |*out| to NULL. It returns one
* on success, whether or not the element was found, and zero on
* decode error. */
-static int d2i_SSL_SESSION_get_string(CBS *cbs, char **out, unsigned tag) {
+static int SSL_SESSION_parse_string(CBS *cbs, char **out, unsigned tag) {
CBS value;
int present;
if (!CBS_get_optional_asn1_octet_string(cbs, &value, &present, tag)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse_string, SSL_R_INVALID_SSL_SESSION);
return 0;
}
if (present) {
if (CBS_contains_zero_byte(&value)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse_string,
+ SSL_R_INVALID_SSL_SESSION);
return 0;
}
if (!CBS_strdup(&value, out)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, ERR_R_MALLOC_FAILURE);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse_string, ERR_R_MALLOC_FAILURE);
return 0;
}
} else {
@@ -389,45 +390,42 @@
return 1;
}
-/* d2i_SSL_SESSION_get_string gets an optional ASN.1 OCTET STRING
+/* SSL_SESSION_parse_string gets an optional ASN.1 OCTET STRING
* explicitly tagged with |tag| from |cbs| and stows it in |*out_ptr|
* and |*out_len|. If |*out_ptr| is not NULL, it frees the existing
* contents. On entry, if the element was not found, it sets
* |*out_ptr| to NULL. It returns one on success, whether or not the
* element was found, and zero on decode error. */
-static int d2i_SSL_SESSION_get_octet_string(CBS *cbs, uint8_t **out_ptr,
+static int SSL_SESSION_parse_octet_string(CBS *cbs, uint8_t **out_ptr,
size_t *out_len, unsigned tag) {
CBS value;
if (!CBS_get_optional_asn1_octet_string(cbs, &value, NULL, tag)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse_octet_string,
+ SSL_R_INVALID_SSL_SESSION);
return 0;
}
if (!CBS_stow(&value, out_ptr, out_len)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, ERR_R_MALLOC_FAILURE);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse_octet_string,
+ ERR_R_MALLOC_FAILURE);
return 0;
}
return 1;
}
-SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const uint8_t **pp, long length) {
- SSL_SESSION *ret, *allocated = NULL;
- CBS cbs, session, cipher, session_id, master_key;
+static SSL_SESSION *SSL_SESSION_parse(CBS *cbs) {
+ SSL_SESSION *ret = NULL;
+ CBS session, cipher, session_id, master_key;
CBS peer, sid_ctx, peer_sha256, original_handshake_hash;
int has_peer, has_peer_sha256, extended_master_secret;
uint64_t version, ssl_version;
uint64_t session_time, timeout, verify_result, ticket_lifetime_hint;
- if (a && *a) {
- ret = *a;
- } else {
- ret = allocated = SSL_SESSION_new();
- if (allocated == NULL) {
- goto err;
- }
+ ret = SSL_SESSION_new();
+ if (ret == NULL) {
+ goto err;
}
- CBS_init(&cbs, *pp, length);
- if (!CBS_get_asn1(&cbs, &session, CBS_ASN1_SEQUENCE) ||
+ if (!CBS_get_asn1(cbs, &session, CBS_ASN1_SEQUENCE) ||
!CBS_get_asn1_uint64(&session, &version) ||
!CBS_get_asn1_uint64(&session, &ssl_version) ||
!CBS_get_asn1(&session, &cipher, CBS_ASN1_OCTETSTRING) ||
@@ -441,21 +439,21 @@
kSessionIDContextTag) ||
!CBS_get_optional_asn1_uint64(&session, &verify_result, kVerifyResultTag,
X509_V_OK)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
- if (!d2i_SSL_SESSION_get_string(&session, &ret->tlsext_hostname,
- kHostNameTag) ||
- !d2i_SSL_SESSION_get_string(&session, &ret->psk_identity,
- kPSKIdentityTag)) {
+ if (!SSL_SESSION_parse_string(&session, &ret->tlsext_hostname,
+ kHostNameTag) ||
+ !SSL_SESSION_parse_string(&session, &ret->psk_identity,
+ kPSKIdentityTag)) {
goto err;
}
if (!CBS_get_optional_asn1_uint64(&session, &ticket_lifetime_hint,
kTicketLifetimeHintTag, 0)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
- if (!d2i_SSL_SESSION_get_octet_string(&session, &ret->tlsext_tick,
+ if (!SSL_SESSION_parse_octet_string(&session, &ret->tlsext_tick,
&ret->tlsext_ticklen, kTicketTag)) {
goto err;
}
@@ -463,14 +461,14 @@
&has_peer_sha256, kPeerSHA256Tag) ||
!CBS_get_optional_asn1_octet_string(&session, &original_handshake_hash,
NULL, kOriginalHandshakeHashTag)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
- if (!d2i_SSL_SESSION_get_octet_string(
+ if (!SSL_SESSION_parse_octet_string(
&session, &ret->tlsext_signed_cert_timestamp_list,
&ret->tlsext_signed_cert_timestamp_list_length,
kSignedCertTimestampListTag) ||
- !d2i_SSL_SESSION_get_octet_string(
+ !SSL_SESSION_parse_octet_string(
&session, &ret->ocsp_response, &ret->ocsp_response_length,
kOCSPResponseTag)) {
goto err;
@@ -479,44 +477,44 @@
kExtendedMasterSecretTag,
0 /* default to false */) ||
CBS_len(&session) != 0) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
ret->extended_master_secret = extended_master_secret;
if (version != SSL_SESSION_ASN1_VERSION) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
/* Only support SSLv3/TLS and DTLS. */
if ((ssl_version >> 8) != SSL3_VERSION_MAJOR &&
(ssl_version >> 8) != (DTLS1_VERSION >> 8)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_UNKNOWN_SSL_VERSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_UNKNOWN_SSL_VERSION);
goto err;
}
ret->ssl_version = ssl_version;
uint16_t cipher_value;
if (!CBS_get_u16(&cipher, &cipher_value) || CBS_len(&cipher) != 0) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_CIPHER_CODE_WRONG_LENGTH);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_CIPHER_CODE_WRONG_LENGTH);
goto err;
}
ret->cipher = SSL_get_cipher_by_value(cipher_value);
if (ret->cipher == NULL) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_UNSUPPORTED_CIPHER);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_UNSUPPORTED_CIPHER);
goto err;
}
if (CBS_len(&session_id) > SSL3_MAX_SSL_SESSION_ID_LENGTH) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->session_id, CBS_data(&session_id), CBS_len(&session_id));
ret->session_id_length = CBS_len(&session_id);
if (CBS_len(&master_key) > SSL_MAX_MASTER_KEY_LENGTH) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->master_key, CBS_data(&master_key), CBS_len(&master_key));
@@ -524,7 +522,7 @@
if (session_time > LONG_MAX ||
timeout > LONG_MAX) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
ret->time = session_time;
@@ -540,13 +538,13 @@
goto err;
}
if (ptr != CBS_data(&peer) + CBS_len(&peer)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
}
if (CBS_len(&sid_ctx) > sizeof(ret->sid_ctx)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->sid_ctx, CBS_data(&sid_ctx), CBS_len(&sid_ctx));
@@ -554,7 +552,7 @@
if (verify_result > LONG_MAX ||
ticket_lifetime_hint > 0xffffffff) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
ret->verify_result = verify_result;
@@ -562,7 +560,7 @@
if (has_peer_sha256) {
if (CBS_len(&peer_sha256) != sizeof(ret->peer_sha256)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->peer_sha256, CBS_data(&peer_sha256), sizeof(ret->peer_sha256));
@@ -573,20 +571,53 @@
if (CBS_len(&original_handshake_hash) >
sizeof(ret->original_handshake_hash)) {
- OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, SSL_R_INVALID_SSL_SESSION);
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_parse, SSL_R_INVALID_SSL_SESSION);
goto err;
}
memcpy(ret->original_handshake_hash, CBS_data(&original_handshake_hash),
CBS_len(&original_handshake_hash));
ret->original_handshake_hash_len = CBS_len(&original_handshake_hash);
+ return ret;
+
+err:
+ SSL_SESSION_free(ret);
+ return NULL;
+}
+
+SSL_SESSION *SSL_SESSION_from_bytes(const uint8_t *in, size_t in_len) {
+ CBS cbs;
+ CBS_init(&cbs, in, in_len);
+ SSL_SESSION *ret = SSL_SESSION_parse(&cbs);
+ if (ret == NULL) {
+ return NULL;
+ }
+ if (CBS_len(&cbs) != 0) {
+ OPENSSL_PUT_ERROR(SSL, SSL_SESSION_from_bytes, SSL_R_INVALID_SSL_SESSION);
+ SSL_SESSION_free(ret);
+ return NULL;
+ }
+ return ret;
+}
+
+SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const uint8_t **pp, long length) {
+ if (length < 0) {
+ OPENSSL_PUT_ERROR(SSL, d2i_SSL_SESSION, ERR_R_INTERNAL_ERROR);
+ return NULL;
+ }
+
+ CBS cbs;
+ CBS_init(&cbs, *pp, length);
+
+ SSL_SESSION *ret = SSL_SESSION_parse(&cbs);
+ if (ret == NULL) {
+ return NULL;
+ }
+
if (a) {
+ SSL_SESSION_free(*a);
*a = ret;
}
*pp = CBS_data(&cbs);
return ret;
-
-err:
- SSL_SESSION_free(allocated);
- return NULL;
}