* apt-pkg/contrib/sha2_internal.cc:

  - use a pointer-union to peace gcc strict-aliasing warning

1 files changed, 13 insertions, 3 deletions

diff --git a/apt-pkg/contrib/sha2_internal.cc b/apt-pkg/contrib/sha2_internal.cc
index ff995cdf2..6d27e8f2b 100644
--- a/apt-pkg/contrib/sha2_internal.cc
+++ b/apt-pkg/contrib/sha2_internal.cc
@@ -605,7 +605,12 @@ void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
 			*context->buffer = 0x80;
 		}
 		/* Set the bit count: */
-		*(sha2_word64*)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
+		union {
+			sha2_byte* c;
+			sha2_word64* l;
+		} bitcount;
+		bitcount.c = &context->buffer[SHA256_SHORT_BLOCK_LENGTH];
+		*(bitcount.l) = context->bitcount;
 
 		/* Final transform: */
 		SHA256_Transform(context, (sha2_word32*)context->buffer);
@@ -922,8 +927,13 @@ static void SHA512_Last(SHA512_CTX* context) {
 		*context->buffer = 0x80;
 	}
 	/* Store the length of input data (in bits): */
-	*(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
-	*(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
+	union {
+		sha2_byte* c;
+		sha2_word64* l;
+	} bitcount;
+	bitcount.c = &context->buffer[SHA512_SHORT_BLOCK_LENGTH];
+	bitcount.l[0] = context->bitcount[1];
+	bitcount.l[1] = context->bitcount[0];
 
 	/* Final transform: */
 	SHA512_Transform(context, (sha2_word64*)context->buffer);