X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/a0e07f3ec885c12c733c12805391646c202f3f31..2a49601f69e08f06fb2727d869d420daacdd09d5:/apt-pkg/contrib/sha2_internal.cc?ds=sidebyside

diff --git a/apt-pkg/contrib/sha2_internal.cc b/apt-pkg/contrib/sha2_internal.cc
index ff995cdf2..83b5a98d3 100644
--- a/apt-pkg/contrib/sha2_internal.cc
+++ b/apt-pkg/contrib/sha2_internal.cc
@@ -552,7 +552,9 @@ void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
 	}
 	while (len >= SHA256_BLOCK_LENGTH) {
 		/* Process as many complete blocks as we can */
-		SHA256_Transform(context, (sha2_word32*)data);
+		sha2_byte buffer[SHA256_BLOCK_LENGTH];
+		MEMCPY_BCOPY(buffer, data, SHA256_BLOCK_LENGTH);
+		SHA256_Transform(context, (sha2_word32*)buffer);
 		context->bitcount += SHA256_BLOCK_LENGTH << 3;
 		len -= SHA256_BLOCK_LENGTH;
 		data += SHA256_BLOCK_LENGTH;
@@ -605,7 +607,12 @@ 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);
@@ -874,7 +881,9 @@ void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
 	}
 	while (len >= SHA512_BLOCK_LENGTH) {
 		/* Process as many complete blocks as we can */
-		SHA512_Transform(context, (sha2_word64*)data);
+		sha2_byte buffer[SHA512_BLOCK_LENGTH];
+		MEMCPY_BCOPY(buffer, data, SHA512_BLOCK_LENGTH);
+		SHA512_Transform(context, (sha2_word64*)buffer);
 		ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
 		len -= SHA512_BLOCK_LENGTH;
 		data += SHA512_BLOCK_LENGTH;
@@ -922,8 +931,13 @@ 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);