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Add a helper function to normalize the current version.

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We have need to normalize other versions during version negotiation, but
almost all will be post-negotiation. Hopefully later this can be
replaced with a value explicitly stored on the object and we do away
with ssl->version.

Change-Id: I595db9163d0af2e7c083b9a09310179aaa9ac812
Reviewed-on: https://boringssl-review.googlesource.com/6841
Reviewed-by: Adam Langley <alangley@gmail.com>
This commit is contained in:
David Benjamin 2015-12-29 23:58:17 -05:00 committed by Adam Langley
parent 23b0a65df1
commit b9e4fa5e02
5 changed files with 18 additions and 11 deletions
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6
ssl/internal.h
View File

@ -1272,7 +1272,11 @@ int ssl3_is_version_enabled(SSL *ssl, uint16_t version);
*
* TODO(davidben): To normalize some DTLS-specific code, move away from using
* the wire version except at API boundaries. */
uint16_t ssl3_version_from_wire(SSL *ssl, uint16_t wire_version);
uint16_t ssl3_version_from_wire(const SSL *ssl, uint16_t wire_version);
/* ssl3_protocol_version returns |ssl|'s protocol version. It is an error to
* call this function before the version is determined. */
uint16_t ssl3_protocol_version(const SSL *ssl);
uint32_t ssl_get_algorithm_prf(const SSL *ssl);
int tls1_parse_peer_sigalgs(SSL *ssl, const CBS *sigalgs);

3
ssl/s3_clnt.c
View File

@ -836,8 +836,7 @@ int ssl3_get_server_hello(SSL *ssl) {
/* If the cipher is disabled then we didn't sent it in the ClientHello, so if
* the server selected it, it's an error. */
if ((c->algorithm_mkey & ct->mask_k) || (c->algorithm_auth & ct->mask_a) ||
SSL_CIPHER_get_min_version(c) >
ssl3_version_from_wire(ssl, ssl->version)) {
SSL_CIPHER_get_min_version(c) > ssl3_protocol_version(ssl)) {
al = SSL_AD_ILLEGAL_PARAMETER;
OPENSSL_PUT_ERROR(SSL, SSL_R_WRONG_CIPHER_RETURNED);
goto f_err;

3
ssl/s3_lib.c
View File

@ -494,8 +494,7 @@ const SSL_CIPHER *ssl3_choose_cipher(
ok = 1;
/* Check the TLS version. */
if (SSL_CIPHER_get_min_version(c) >
ssl3_version_from_wire(ssl, ssl->version)) {
if (SSL_CIPHER_get_min_version(c) > ssl3_protocol_version(ssl)) {
ok = 0;
}

7
ssl/ssl_lib.c
View File

@ -2469,7 +2469,7 @@ int ssl3_is_version_enabled(SSL *ssl, uint16_t version) {
}
}
uint16_t ssl3_version_from_wire(SSL *ssl, uint16_t wire_version) {
uint16_t ssl3_version_from_wire(const SSL *ssl, uint16_t wire_version) {
if (!SSL_IS_DTLS(ssl)) {
return wire_version;
}
@ -2490,6 +2490,11 @@ uint16_t ssl3_version_from_wire(SSL *ssl, uint16_t wire_version) {
return version;
}
uint16_t ssl3_protocol_version(const SSL *ssl) {
assert(ssl->s3->have_version);
return ssl3_version_from_wire(ssl, ssl->version);
}
int SSL_cache_hit(SSL *ssl) { return SSL_session_reused(ssl); }
int SSL_is_server(SSL *ssl) { return ssl->server; }

10
ssl/t1_enc.c
View File

@ -305,10 +305,10 @@ int tls1_change_cipher_state(SSL *ssl, int which) {
iv = server_write_iv;
}
SSL_AEAD_CTX *aead_ctx = SSL_AEAD_CTX_new(
is_read ? evp_aead_open : evp_aead_seal,
ssl3_version_from_wire(ssl, ssl->version), ssl->s3->tmp.new_cipher, key,
key_len, mac_secret, mac_secret_len, iv, iv_len);
SSL_AEAD_CTX *aead_ctx =
SSL_AEAD_CTX_new(is_read ? evp_aead_open : evp_aead_seal,
ssl3_protocol_version(ssl), ssl->s3->tmp.new_cipher, key,
key_len, mac_secret, mac_secret_len, iv, iv_len);
if (aead_ctx == NULL) {
return 0;
}
@ -345,7 +345,7 @@ int tls1_setup_key_block(SSL *ssl) {
if (ssl->session->cipher == NULL ||
!ssl_cipher_get_evp_aead(&aead, &mac_secret_len, &fixed_iv_len,
ssl->session->cipher,
ssl3_version_from_wire(ssl, ssl->version))) {
ssl3_protocol_version(ssl))) {
OPENSSL_PUT_ERROR(SSL, SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
return 0;
}