crypt: Use internal names for the SHA-2 block functions

These functions are externally visible with a static libcrypt
library.

2016-10-28  Florian Weimer  <fweimer@redhat.com>

	* crypt/sha256.c, crypt/sha256-block.c,
	sysdeps/sparc/sparc64/multiarch/sha256-block.c: Rename
	sha256_process_block to __sha256_process_block.
	* crypt/sha512.c, crypt/sha512-block.c,
	sysdeps/sparc/sparc64/multiarch/sha512-block.c: Rename
	sha512_process_block to __sha512_process_block.

diff --git a/crypt/sha256-block.c b/crypt/sha256-block.c
index 8a77096..a44fe01 100644
--- a/crypt/sha256-block.c
+++ b/crypt/sha256-block.c
@@ -3,7 +3,7 @@
 /* Process LEN bytes of BUFFER, accumulating context into CTX.
    It is assumed that LEN % 64 == 0.  */
 void
-sha256_process_block (const void *buffer, size_t len, struct sha256_ctx *ctx)
+__sha256_process_block (const void *buffer, size_t len, struct sha256_ctx *ctx)
 {
   const uint32_t *words = buffer;
   size_t nwords = len / sizeof (uint32_t);
diff --git a/crypt/sha256.c b/crypt/sha256.c
index e858f4b..b5497d9 100644
--- a/crypt/sha256.c
+++ b/crypt/sha256.c
@@ -81,8 +81,7 @@ static const uint32_t K[64] =
     0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
   };
 
-void
-sha256_process_block (const void *, size_t, struct sha256_ctx *);
+void __sha256_process_block (const void *, size_t, struct sha256_ctx *);
 
 /* Initialize structure containing state of computation.
    (FIPS 180-2:5.3.2)  */
@@ -131,7 +130,7 @@ __sha256_finish_ctx (struct sha256_ctx *ctx, void *resbuf)
 #endif
 
   /* Process last bytes.  */
-  sha256_process_block (ctx->buffer, bytes + pad + 8, ctx);
+  __sha256_process_block (ctx->buffer, bytes + pad + 8, ctx);
 
   /* Put result from CTX in first 32 bytes following RESBUF.  */
   for (unsigned int i = 0; i < 8; ++i)
@@ -156,7 +155,7 @@ __sha256_process_bytes (const void *buffer, size_t len, struct sha256_ctx *ctx)
 
       if (ctx->buflen > 64)
 	{
-	  sha256_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
+	  __sha256_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
 
 	  ctx->buflen &= 63;
 	  /* The regions in the following copy operation cannot overlap.  */
@@ -182,14 +181,14 @@ __sha256_process_bytes (const void *buffer, size_t len, struct sha256_ctx *ctx)
       if (UNALIGNED_P (buffer))
 	while (len > 64)
 	  {
-	    sha256_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
+	    __sha256_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
 	    buffer = (const char *) buffer + 64;
 	    len -= 64;
 	  }
       else
 #endif
 	{
-	  sha256_process_block (buffer, len & ~63, ctx);
+	  __sha256_process_block (buffer, len & ~63, ctx);
 	  buffer = (const char *) buffer + (len & ~63);
 	  len &= 63;
 	}
@@ -204,7 +203,7 @@ __sha256_process_bytes (const void *buffer, size_t len, struct sha256_ctx *ctx)
       left_over += len;
       if (left_over >= 64)
 	{
-	  sha256_process_block (ctx->buffer, 64, ctx);
+	  __sha256_process_block (ctx->buffer, 64, ctx);
 	  left_over -= 64;
 	  memcpy (ctx->buffer, &ctx->buffer[64], left_over);
 	}
diff --git a/crypt/sha512-block.c b/crypt/sha512-block.c
index c542db1..577839f 100644
--- a/crypt/sha512-block.c
+++ b/crypt/sha512-block.c
@@ -3,7 +3,7 @@
 /* Process LEN bytes of BUFFER, accumulating context into CTX.
    It is assumed that LEN % 128 == 0.  */
 void
-sha512_process_block (const void *buffer, size_t len, struct sha512_ctx *ctx)
+__sha512_process_block (const void *buffer, size_t len, struct sha512_ctx *ctx)
 {
   const uint64_t *words = buffer;
   size_t nwords = len / sizeof (uint64_t);
diff --git a/crypt/sha512.c b/crypt/sha512.c
index 47f3f7c..dd2af3c 100644
--- a/crypt/sha512.c
+++ b/crypt/sha512.c
@@ -101,8 +101,8 @@ static const uint64_t K[80] =
     UINT64_C (0x5fcb6fab3ad6faec), UINT64_C (0x6c44198c4a475817)
   };
 
-void
-sha512_process_block (const void *buffer, size_t len, struct sha512_ctx *ctx);
+void __sha512_process_block (const void *buffer, size_t len,
+			     struct sha512_ctx *ctx);
 
 /* Initialize structure containing state of computation.
    (FIPS 180-2:5.3.3)  */
@@ -153,7 +153,7 @@ __sha512_finish_ctx (struct sha512_ctx *ctx, void *resbuf)
 					   (ctx->total[TOTAL128_low] >> 61));
 
   /* Process last bytes.  */
-  sha512_process_block (ctx->buffer, bytes + pad + 16, ctx);
+  __sha512_process_block (ctx->buffer, bytes + pad + 16, ctx);
 
   /* Put result from CTX in first 64 bytes following RESBUF.  */
   for (unsigned int i = 0; i < 8; ++i)
@@ -178,7 +178,7 @@ __sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
 
       if (ctx->buflen > 128)
 	{
-	  sha512_process_block (ctx->buffer, ctx->buflen & ~127, ctx);
+	  __sha512_process_block (ctx->buffer, ctx->buflen & ~127, ctx);
 
 	  ctx->buflen &= 127;
 	  /* The regions in the following copy operation cannot overlap.  */
@@ -204,7 +204,7 @@ __sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
       if (UNALIGNED_P (buffer))
 	while (len > 128)
 	  {
-	    sha512_process_block (memcpy (ctx->buffer, buffer, 128), 128,
+	    __sha512_process_block (memcpy (ctx->buffer, buffer, 128), 128,
 				    ctx);
 	    buffer = (const char *) buffer + 128;
 	    len -= 128;
@@ -212,7 +212,7 @@ __sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
       else
 #endif
 	{
-	  sha512_process_block (buffer, len & ~127, ctx);
+	  __sha512_process_block (buffer, len & ~127, ctx);
 	  buffer = (const char *) buffer + (len & ~127);
 	  len &= 127;
 	}
@@ -227,7 +227,7 @@ __sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
       left_over += len;
       if (left_over >= 128)
 	{
-	  sha512_process_block (ctx->buffer, 128, ctx);
+	  __sha512_process_block (ctx->buffer, 128, ctx);
 	  left_over -= 128;
 	  memcpy (ctx->buffer, &ctx->buffer[128], left_over);
 	}
diff --git a/sysdeps/sparc/sparc64/multiarch/sha256-block.c b/sysdeps/sparc/sparc64/multiarch/sha256-block.c
index 79966b9..aa57662 100644
--- a/sysdeps/sparc/sparc64/multiarch/sha256-block.c
+++ b/sysdeps/sparc/sparc64/multiarch/sha256-block.c
@@ -1,12 +1,12 @@
 #include <sparc-ifunc.h>
 
-#define sha256_process_block sha256_process_block_generic
-extern void sha256_process_block_generic (const void *buffer, size_t len,
-					  struct sha256_ctx *ctx);
+#define __sha256_process_block __sha256_process_block_generic
+extern void __sha256_process_block_generic (const void *buffer, size_t len,
+					    struct sha256_ctx *ctx);
 
 #include <crypt/sha256-block.c>
 
-#undef sha256_process_block
+#undef __sha256_process_block
 
 extern void __sha256_process_block_crop (const void *buffer, size_t len,
 					 struct sha256_ctx *ctx);
@@ -25,6 +25,8 @@ static bool cpu_supports_sha256(int hwcap)
   return false;
 }
 
-extern void sha256_process_block (const void *buffer, size_t len,
-				  struct sha256_ctx *ctx);
-sparc_libc_ifunc(sha256_process_block, cpu_supports_sha256(hwcap) ? __sha256_process_block_crop : sha256_process_block_generic);
+extern void __sha256_process_block (const void *buffer, size_t len,
+				    struct sha256_ctx *ctx);
+sparc_libc_ifunc (__sha256_process_block,
+		  cpu_supports_sha256(hwcap) ? __sha256_process_block_crop
+		    : sha256_process_block_generic);
diff --git a/sysdeps/sparc/sparc64/multiarch/sha512-block.c b/sysdeps/sparc/sparc64/multiarch/sha512-block.c
index 0d1c3dd..2863e05 100644
--- a/sysdeps/sparc/sparc64/multiarch/sha512-block.c
+++ b/sysdeps/sparc/sparc64/multiarch/sha512-block.c
@@ -1,12 +1,12 @@
 #include <sparc-ifunc.h>
 
-#define sha512_process_block sha512_process_block_generic
-extern void sha512_process_block_generic (const void *buffer, size_t len,
-					  struct sha512_ctx *ctx);
+#define __sha512_process_block __sha512_process_block_generic
+extern void __sha512_process_block_generic (const void *buffer, size_t len,
+					    struct sha512_ctx *ctx);
 
 #include <crypt/sha512-block.c>
 
-#undef sha512_process_block
+#undef __sha512_process_block
 
 extern void __sha512_process_block_crop (const void *buffer, size_t len,
 					 struct sha512_ctx *ctx);
@@ -25,6 +25,8 @@ static bool cpu_supports_sha512(int hwcap)
   return false;
 }
 
-extern void sha512_process_block (const void *buffer, size_t len,
-				  struct sha512_ctx *ctx);
-sparc_libc_ifunc(sha512_process_block, cpu_supports_sha512(hwcap) ? __sha512_process_block_crop : sha512_process_block_generic);
+extern void __sha512_process_block (const void *buffer, size_t len,
+				    struct sha512_ctx *ctx);
+sparc_libc_ifunc (__sha512_process_block,
+		  cpu_supports_sha512(hwcap) ? __sha512_process_block_crop
+		    : __sha512_process_block_generic);
