Make parameters of CTLOG_get* const

Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>

crypto/ct/ct_log.c

diff --git a/crypto/ct/ct_log.c b/crypto/ct/ct_log.c
index 03cb51f..4f3fe3c 100644
--- a/crypto/ct/ct_log.c
+++ b/crypto/ct/ct_log.c
@@ -315,18 +315,19 @@
     }
 }
 
-const char *CTLOG_get0_name(CTLOG *log)
+const char *CTLOG_get0_name(const CTLOG *log)
 {
     return log->name;
 }
 
-void CTLOG_get0_log_id(CTLOG *log, uint8_t **log_id, size_t *log_id_len)
+void CTLOG_get0_log_id(const CTLOG *log, const uint8_t **log_id,
+                       size_t *log_id_len)
 {
     *log_id = log->log_id;
     *log_id_len = CT_V1_HASHLEN;
 }
 
-EVP_PKEY *CTLOG_get0_public_key(CTLOG *log)
+EVP_PKEY *CTLOG_get0_public_key(const CTLOG *log)
 {
     return log->public_key;
 }

include/openssl/ct.h

diff --git a/include/openssl/ct.h b/include/openssl/ct.h
index 1225242..0f29f3c 100644
--- a/include/openssl/ct.h
+++ b/include/openssl/ct.h
@@ -515,11 +515,12 @@
 void CTLOG_free(CTLOG *log);
 
 /* Gets the name of the CT log */
-const char *CTLOG_get0_name(CTLOG *log);
+const char *CTLOG_get0_name(const CTLOG *log);
 /* Gets the ID of the CT log */
-void CTLOG_get0_log_id(CTLOG *log, uint8_t **log_id, size_t *log_id_len);
+void CTLOG_get0_log_id(const CTLOG *log, const uint8_t **log_id,
+                       size_t *log_id_len);
 /* Gets the public key of the CT log */
-EVP_PKEY *CTLOG_get0_public_key(CTLOG *log);
+EVP_PKEY *CTLOG_get0_public_key(const CTLOG *log);
 
 /**************************
  * CT log store functions *