Add support for symbol hiding disabled by default.

Fully explained in libcrypto/README. TL;DR make sure libcrypto
and libssl's function calls internally and to each other are via
symbol names that won't get overridden by linking other libraries.

Mostly work by guenther@, which will currently be gated behind a
build setting NAMESPACE=yes. once we convert all the symbols to
this method we will do a major bump and pick up the changes.

ok tb@ jsing@

1 files changed, 10 insertions, 1 deletions

diff --git a/src/lib/libcrypto/hmac/hmac.c b/src/lib/libcrypto/hmac/hmac.c
index 3421119b7e..b195ca680b 100644
--- a/src/lib/libcrypto/hmac/hmac.c
+++ b/src/lib/libcrypto/hmac/hmac.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: hmac.c,v 1.28 2022/05/05 18:29:34 tb Exp $ */
+/* $OpenBSD: hmac.c,v 1.29 2022/11/11 11:25:18 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -134,6 +134,7 @@ HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md,
 err:
         return 0;
 }
+LCRYPTO_ALIAS(HMAC_Init_ex)
 
 int
 HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md)
@@ -151,6 +152,7 @@ HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len)
 
         return EVP_DigestUpdate(&ctx->md_ctx, data, len);
 }
+LCRYPTO_ALIAS(HMAC_Update)
 
 int
 HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
@@ -173,6 +175,7 @@ HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
 err:
         return 0;
 }
+LCRYPTO_ALIAS(HMAC_Final)
 
 HMAC_CTX *
 HMAC_CTX_new(void)
@@ -186,6 +189,7 @@ HMAC_CTX_new(void)
 
         return ctx;
 }
+LCRYPTO_ALIAS(HMAC_CTX_new)
 
 void
 HMAC_CTX_free(HMAC_CTX *ctx)
@@ -197,6 +201,7 @@ HMAC_CTX_free(HMAC_CTX *ctx)
 
         free(ctx);
 }
+LCRYPTO_ALIAS(HMAC_CTX_free)
 
 int
 HMAC_CTX_reset(HMAC_CTX *ctx)
@@ -231,6 +236,7 @@ HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx)
 err:
         return 0;
 }
+LCRYPTO_ALIAS(HMAC_CTX_copy)
 
 void
 HMAC_CTX_cleanup(HMAC_CTX *ctx)
@@ -248,12 +254,14 @@ HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags)
         EVP_MD_CTX_set_flags(&ctx->o_ctx, flags);
         EVP_MD_CTX_set_flags(&ctx->md_ctx, flags);
 }
+LCRYPTO_ALIAS(HMAC_CTX_set_flags)
 
 const EVP_MD *
 HMAC_CTX_get_md(const HMAC_CTX *ctx)
 {
         return ctx->md;
 }
+LCRYPTO_ALIAS(HMAC_CTX_get_md)
 
 unsigned char *
 HMAC(const EVP_MD *evp_md, const void *key, int key_len, const unsigned char *d,
@@ -282,3 +290,4 @@ err:
         HMAC_CTX_cleanup(&c);
         return NULL;
 }
+LCRYPTO_ALIAS(HMAC)