Sync 4.next from master

[users/jgh/exim.git] / src / src / hash.c

diff --git a/src/src/hash.c b/src/src/hash.c
index c2be85d17c9d5ba5daea818e2b4a87c9e5f3f000..7590d55b7f16356ff91ad7eda23c7c07db841287 100644 (file)
--- a/src/src/hash.c
+++ b/src/src/hash.c
@@ -25,20 +25,21 @@ typedef struct sha1 {
 sha1;
 #endif /*STAND_ALONE*/
 
-
+#include <assert.h>
 
 /******************************************************************************/
 #ifdef SHA_OPENSSL
 
-void
+BOOL
 exim_sha_init(hctx * h, hashmethod m)
 {
 switch (h->method = m)
   {
   case HASH_SHA1:   h->hashlen = 20; SHA1_Init  (&h->u.sha1); break;
   case HASH_SHA256: h->hashlen = 32; SHA256_Init(&h->u.sha2); break;
-  default:         h->hashlen = 0; break;
+  default:         h->hashlen = 0; return FALSE;
   }
+return TRUE;
 }
 
 
@@ -49,6 +50,9 @@ switch (h->method)
   {
   case HASH_SHA1:   SHA1_Update  (&h->u.sha1, data, len); break;
   case HASH_SHA256: SHA256_Update(&h->u.sha2, data, len); break;
+  /* should be blocked by init not handling these, but be explicit to
+   * guard against accidents later (and hush up clang -Wswitch) */
+  default: assert(0);
   }
 }
 
@@ -61,6 +65,7 @@ switch (h->method)
   {
   case HASH_SHA1:   SHA1_Final  (b->data, &h->u.sha1); break;
   case HASH_SHA256: SHA256_Final(b->data, &h->u.sha2); break;
+  default: assert(0);
   }
 }
 
@@ -69,7 +74,7 @@ switch (h->method)
 #elif defined(SHA_GNUTLS)
 /******************************************************************************/
 
-void
+BOOL
 exim_sha_init(hctx * h, hashmethod m)
 {
 switch (h->method = m)
@@ -79,8 +84,9 @@ switch (h->method = m)
 #ifdef EXIM_HAVE_SHA3
   case HASH_SHA3_256: h->hashlen = 32; gnutls_hash_init(&h->sha, GNUTLS_DIG_SHA3_256); break;
 #endif
-  default: h->hashlen = 0; break;
+  default: h->hashlen = 0; return FALSE;
   }
+return TRUE;
 }
 
 
@@ -103,15 +109,16 @@ gnutls_hash_output(h->sha, b->data);
 #elif defined(SHA_GCRYPT)
 /******************************************************************************/
 
-void
+BOOL
 exim_sha_init(hctx * h, hashmethod m)
 {
 switch (h->method = m)
   {
   case HASH_SHA1:   h->hashlen = 20; gcry_md_open(&h->sha, GCRY_MD_SHA1, 0); break;
   case HASH_SHA256: h->hashlen = 32; gcry_md_open(&h->sha, GCRY_MD_SHA256, 0); break;
-  default:         h->hashlen = 0; break;
+  default:         h->hashlen = 0; return FALSE;
   }
+return TRUE;
 }
 
 
@@ -135,15 +142,16 @@ memcpy(b->data, gcry_md_read(h->sha, 0), h->hashlen);
 #elif defined(SHA_POLARSSL)
 /******************************************************************************/
 
-void
+BOOL
 exim_sha_init(hctx * h, hashmethod m)
 {
 switch (h->method = m)
   {
   case HASH_SHA1:   h->hashlen = 20; sha1_starts(&h->u.sha1);    break;
   case HASH_SHA256: h->hashlen = 32; sha2_starts(&h->u.sha2, 0); break;
-  default:         h->hashlen = 0; break;
+  default:         h->hashlen = 0; return FALSE;
   }
+return TRUE;
 }
 
 
@@ -382,11 +390,12 @@ for (i = 0; i < 5; i++)
 
 
 # ifdef notdef
-void
+BOOL
 exim_sha_init(hctx * h, hashmethod m)
 {
 h->hashlen = 20;
 native_sha1_start(&h->sha1);
+return TRUE;
 }
 
 
@@ -452,7 +461,7 @@ native_sha1_end(&h->sha1, data, len, digest);
 void
 sha1_start(hctx * h)
 {
-exim_sha_init(h, HASH_SHA1);
+(void) exim_sha_init(h, HASH_SHA1);
 }
 
 void