core/crypto: Switch to using ensure

core/crypto/hmac/hmac.odin

@@ -56,7 +56,7 @@ init :: proc(ctx: ^Context, algorithm: hash.Algorithm, key: []byte) {
 
 // update adds more data to the Context.
 update :: proc(ctx: ^Context, data: []byte) {
-	assert(ctx._is_initialized)
+	ensure(ctx._is_initialized)
 
 	hash.update(&ctx._i_hash, data)
 }
@@ -64,13 +64,10 @@ update :: proc(ctx: ^Context, data: []byte) {
 // final finalizes the Context, writes the tag to dst, and calls
 // reset on the Context.
 final :: proc(ctx: ^Context, dst: []byte) {
-	assert(ctx._is_initialized)
-
 	defer (reset(ctx))
 
-	if len(dst) != ctx._tag_sz {
-		panic("crypto/hmac: invalid destination tag size")
-	}
+	ensure(ctx._is_initialized)
+	ensure(len(dst) == ctx._tag_sz, "crypto/hmac: invalid destination tag size")
 
 	hash.final(&ctx._i_hash, dst) // H((k ^ ipad) || text)
 
@@ -105,14 +102,14 @@ reset :: proc(ctx: ^Context) {
 
 // algorithm returns the Algorithm used by a Context instance.
 algorithm :: proc(ctx: ^Context) -> hash.Algorithm {
-	assert(ctx._is_initialized)
+	ensure(ctx._is_initialized)
 
 	return hash.algorithm(&ctx._i_hash)
 }
 
 // tag_size returns the tag size of a Context instance in bytes.
 tag_size :: proc(ctx: ^Context) -> int {
-	assert(ctx._is_initialized)
+	ensure(ctx._is_initialized)
 
 	return ctx._tag_sz
 }