Add |SSL_CIPHER_get_value| to get the IANA number of a cipher suite.

Change-Id: I1d642e0bf319421d49b48f25803280046a85a176
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/37585
Commit-Queue: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>

ssl/ssl_cipher.cc

diff --git a/ssl/ssl_cipher.cc b/ssl/ssl_cipher.cc
index a420f4d..30037f6 100644
--- a/ssl/ssl_cipher.cc
+++ b/ssl/ssl_cipher.cc
@@ -1377,6 +1377,10 @@
 
 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *cipher) { return cipher->id; }
 
+uint16_t SSL_CIPHER_get_value(const SSL_CIPHER *cipher) {
+  return static_cast<uint16_t>(cipher->id);
+}
+
 int SSL_CIPHER_is_aead(const SSL_CIPHER *cipher) {
   return (cipher->algorithm_mac & SSL_AEAD) != 0;
 }