Deprecate the low level RC5 functions

Use of the low level RC5 functions has been informally discouraged for a long
time.  We now formally deprecate them.

Applications should instead use the EVP APIs, e.g. EVP_EncryptInit_ex,
EVP_EncryptUpdate, EVP_EncryptFinal_ex and the equivalently named decrypt
functions.

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/10834)

1 files changed, 30 insertions, 23 deletions

diff --git a/include/openssl/rc5.h b/include/openssl/rc5.h
index 22bdeca237..a9c06d31d6 100644
--- a/include/openssl/rc5.h
+++ b/include/openssl/rc5.h
@@ -23,43 +23,50 @@
 extern "C" {
 #  endif
 
-#  define RC5_ENCRYPT     1
-#  define RC5_DECRYPT     0
-
-#  define RC5_32_INT unsigned int
-
 #  define RC5_32_BLOCK            8
 #  define RC5_32_KEY_LENGTH       16/* This is a default, max is 255 */
 
+#  ifndef OPENSSL_NO_DEPRECATED_3_0
+#   define RC5_ENCRYPT     1
+#   define RC5_DECRYPT     0
+
+#   define RC5_32_INT unsigned int
+
 /*
  * This are the only values supported.  Tweak the code if you want more The
  * most supported modes will be RC5-32/12/16 RC5-32/16/8
  */
-#  define RC5_8_ROUNDS    8
-#  define RC5_12_ROUNDS   12
-#  define RC5_16_ROUNDS   16
+#   define RC5_8_ROUNDS    8
+#   define RC5_12_ROUNDS   12
+#   define RC5_16_ROUNDS   16
 
 typedef struct rc5_key_st {
     /* Number of rounds */
     int rounds;
     RC5_32_INT data[2 * (RC5_16_ROUNDS + 1)];
 } RC5_32_KEY;
+#  endif
 
-int RC5_32_set_key(RC5_32_KEY *key, int len, const unsigned char *data,
-                   int rounds);
-void RC5_32_ecb_encrypt(const unsigned char *in, unsigned char *out,
-                        RC5_32_KEY *key, int enc);
-void RC5_32_encrypt(unsigned long *data, RC5_32_KEY *key);
-void RC5_32_decrypt(unsigned long *data, RC5_32_KEY *key);
-void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out,
-                        long length, RC5_32_KEY *ks, unsigned char *iv,
-                        int enc);
-void RC5_32_cfb64_encrypt(const unsigned char *in, unsigned char *out,
-                          long length, RC5_32_KEY *schedule,
-                          unsigned char *ivec, int *num, int enc);
-void RC5_32_ofb64_encrypt(const unsigned char *in, unsigned char *out,
-                          long length, RC5_32_KEY *schedule,
-                          unsigned char *ivec, int *num);
+DEPRECATEDIN_3_0(int RC5_32_set_key(RC5_32_KEY *key, int len,
+                                    const unsigned char *data, int rounds))
+DEPRECATEDIN_3_0(void RC5_32_ecb_encrypt(const unsigned char *in,
+                                         unsigned char *out, RC5_32_KEY *key,
+                                         int enc))
+DEPRECATEDIN_3_0(void RC5_32_encrypt(unsigned long *data, RC5_32_KEY *key))
+DEPRECATEDIN_3_0(void RC5_32_decrypt(unsigned long *data, RC5_32_KEY *key))
+DEPRECATEDIN_3_0(void RC5_32_cbc_encrypt(const unsigned char *in,
+                                         unsigned char *out, long length,
+                                         RC5_32_KEY *ks, unsigned char *iv,
+                                         int enc))
+DEPRECATEDIN_3_0(void RC5_32_cfb64_encrypt(const unsigned char *in,
+                                           unsigned char *out, long length,
+                                           RC5_32_KEY *schedule,
+                                           unsigned char *ivec, int *num,
+                                           int enc))
+DEPRECATEDIN_3_0(void RC5_32_ofb64_encrypt(const unsigned char *in,
+                                           unsigned char *out, long length,
+                                           RC5_32_KEY *schedule,
+                                           unsigned char *ivec, int *num))
 
 #  ifdef  __cplusplus
 }