Move ssl3_record_sequence_update with the other record-layer bits.

Change-Id: I045a4d3e304872b8c97231dcde5bca7753a878fb
Reviewed-on: https://boringssl-review.googlesource.com/6831
Reviewed-by: Adam Langley <alangley@gmail.com>

ssl/dtls_record.c

diff --git a/ssl/dtls_record.c b/ssl/dtls_record.c
index 940494a..af839ca 100644
--- a/ssl/dtls_record.c
+++ b/ssl/dtls_record.c
@@ -286,7 +286,7 @@
   if (!SSL_AEAD_CTX_seal(aead, out + DTLS1_RT_HEADER_LENGTH, &ciphertext_len,
                          max_out - DTLS1_RT_HEADER_LENGTH, type, wire_version,
                          &out[3] /* seq */, in, in_len) ||
-      !ssl3_record_sequence_update(&seq[2], 6)) {
+      !ssl_record_sequence_update(&seq[2], 6)) {
     return 0;
   }
 

ssl/internal.h

diff --git a/ssl/internal.h b/ssl/internal.h
index 99f083d..15f590a 100644
--- a/ssl/internal.h
+++ b/ssl/internal.h
@@ -346,6 +346,10 @@
 
 /* Record layer. */
 
+/* ssl_record_sequence_update increments the sequence number in |seq|. It
+ * returns one on success and zero on wraparound. */
+int ssl_record_sequence_update(uint8_t *seq, size_t seq_len);
+
 /* ssl_record_prefix_len returns the length of the prefix before the ciphertext
  * of a record for |ssl|.
  *
@@ -1075,10 +1079,6 @@
 int ssl3_accept(SSL *ssl);
 int ssl3_connect(SSL *ssl);
 
-/* ssl3_record_sequence_update increments the sequence number in |seq|. It
- * returns one on success and zero on wraparound. */
-int ssl3_record_sequence_update(uint8_t *seq, size_t seq_len);
-
 int ssl3_do_change_cipher_spec(SSL *ssl);
 
 int ssl3_set_handshake_header(SSL *ssl, int htype, unsigned long len);

ssl/s3_enc.c

diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c
index 89d861a..f5f847e 100644
--- a/ssl/s3_enc.c
+++ b/ssl/s3_enc.c
@@ -383,18 +383,6 @@
   return ret;
 }
 
-int ssl3_record_sequence_update(uint8_t *seq, size_t seq_len) {
-  size_t i;
-  for (i = seq_len - 1; i < seq_len; i--) {
-    ++seq[i];
-    if (seq[i] != 0) {
-      return 1;
-    }
-  }
-  OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
-  return 0;
-}
-
 int ssl3_alert_code(int code) {
   switch (code) {
     case SSL_AD_CLOSE_NOTIFY:

ssl/tls_record.c

diff --git a/ssl/tls_record.c b/ssl/tls_record.c
index 3381eae..e3a413b 100644
--- a/ssl/tls_record.c
+++ b/ssl/tls_record.c
@@ -130,6 +130,18 @@
          SSL_CIPHER_is_block_cipher(ssl->aead_write_ctx->cipher);
 }
 
+int ssl_record_sequence_update(uint8_t *seq, size_t seq_len) {
+  size_t i;
+  for (i = seq_len - 1; i < seq_len; i--) {
+    ++seq[i];
+    if (seq[i] != 0) {
+      return 1;
+    }
+  }
+  OPENSSL_PUT_ERROR(SSL, ERR_R_OVERFLOW);
+  return 0;
+}
+
 size_t ssl_record_prefix_len(const SSL *ssl) {
   if (SSL_IS_DTLS(ssl)) {
     return DTLS1_RT_HEADER_LENGTH +
@@ -222,7 +234,7 @@
     *out_alert = SSL_AD_BAD_RECORD_MAC;
     return ssl_open_record_error;
   }
-  if (!ssl3_record_sequence_update(ssl->s3->read_sequence, 8)) {
+  if (!ssl_record_sequence_update(ssl->s3->read_sequence, 8)) {
     *out_alert = SSL_AD_INTERNAL_ERROR;
     return ssl_open_record_error;
   }
@@ -284,7 +296,7 @@
                          &ciphertext_len, max_out - SSL3_RT_HEADER_LENGTH,
                          type, wire_version, ssl->s3->write_sequence, in,
                          in_len) ||
-      !ssl3_record_sequence_update(ssl->s3->write_sequence, 8)) {
+      !ssl_record_sequence_update(ssl->s3->write_sequence, 8)) {
     return 0;
   }