The block size may be something other than 8!

crypto/evp/evp_locl.h

@@ -61,10 +61,11 @@
 /* Wrapper functions for each cipher mode */
 
 #define BLOCK_CIPHER_ecb_loop() \
-	unsigned int i; \
-	if(inl < 8) return 1;\
-	inl -= 8; \
-	for(i=0; i <= inl; i+=8) \
+	unsigned int i, bl; \
+	bl = ctx->cipher->block_size;\
+	if(inl < bl) return 1;\
+	inl -= bl; \
+	for(i=0; i <= inl; i+=bl) \
 
 #define BLOCK_CIPHER_func_ecb(cname, cprefix, kstruct, ksched) \
 static int cname##_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) \