diff --git a/sys/crypto/openssl/ossl_chacha20.c b/sys/crypto/openssl/ossl_chacha20.c
--- a/sys/crypto/openssl/ossl_chacha20.c
+++ b/sys/crypto/openssl/ossl_chacha20.c
@@ -65,15 +65,13 @@
 	resid = crp->crp_payload_length;
 	crypto_cursor_init(&cc_in, &crp->crp_buf);
 	crypto_cursor_advance(&cc_in, crp->crp_payload_start);
-	inseg = crypto_cursor_segbase(&cc_in);
-	inlen = crypto_cursor_seglen(&cc_in);
+	inseg = crypto_cursor_segment(&cc_in, &inlen);
 	if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
 		crypto_cursor_init(&cc_out, &crp->crp_obuf);
 		crypto_cursor_advance(&cc_out, crp->crp_payload_output_start);
 	} else
 		cc_out = cc_in;
-	outseg = crypto_cursor_segbase(&cc_out);
-	outlen = crypto_cursor_seglen(&cc_out);
+	outseg = crypto_cursor_segment(&cc_out, &outlen);
 	while (resid >= CHACHA_BLK_SIZE) {
 		if (inlen < CHACHA_BLK_SIZE) {
 			crypto_cursor_copydata(&cc_in, CHACHA_BLK_SIZE, block);
@@ -111,16 +109,14 @@
 
 		if (out == block) {
 			crypto_cursor_copyback(&cc_out, CHACHA_BLK_SIZE, block);
-			outseg = crypto_cursor_segbase(&cc_out);
-			outlen = crypto_cursor_seglen(&cc_out);
+			outseg = crypto_cursor_segment(&cc_out, &outlen);
 		} else {
 			crypto_cursor_advance(&cc_out, todo);
 			outseg += todo;
 			outlen -= todo;
 		}
 		if (in == block) {
-			inseg = crypto_cursor_segbase(&cc_in);
-			inlen = crypto_cursor_seglen(&cc_in);
+			inseg = crypto_cursor_segment(&cc_in, &inlen);
 		} else {
 			crypto_cursor_advance(&cc_in, todo);
 			inseg += todo;
@@ -196,15 +192,13 @@
 	resid = crp->crp_payload_length;
 	crypto_cursor_init(&cc_in, &crp->crp_buf);
 	crypto_cursor_advance(&cc_in, crp->crp_payload_start);
-	inseg = crypto_cursor_segbase(&cc_in);
-	inlen = crypto_cursor_seglen(&cc_in);
+	inseg = crypto_cursor_segment(&cc_in, &inlen);
 	if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
 		crypto_cursor_init(&cc_out, &crp->crp_obuf);
 		crypto_cursor_advance(&cc_out, crp->crp_payload_output_start);
 	} else
 		cc_out = cc_in;
-	outseg = crypto_cursor_segbase(&cc_out);
-	outlen = crypto_cursor_seglen(&cc_out);
+	outseg = crypto_cursor_segment(&cc_out, &outlen);
 	while (resid >= CHACHA_BLK_SIZE) {
 		if (inlen < CHACHA_BLK_SIZE) {
 			crypto_cursor_copydata(&cc_in, CHACHA_BLK_SIZE, block);
@@ -243,16 +237,14 @@
 
 		if (out == block) {
 			crypto_cursor_copyback(&cc_out, CHACHA_BLK_SIZE, block);
-			outseg = crypto_cursor_segbase(&cc_out);
-			outlen = crypto_cursor_seglen(&cc_out);
+			outseg = crypto_cursor_segment(&cc_out, &outlen);
 		} else {
 			crypto_cursor_advance(&cc_out, todo);
 			outseg += todo;
 			outlen -= todo;
 		}
 		if (in == block) {
-			inseg = crypto_cursor_segbase(&cc_in);
-			inlen = crypto_cursor_seglen(&cc_in);
+			inseg = crypto_cursor_segment(&cc_in, &inlen);
 		} else {
 			crypto_cursor_advance(&cc_in, todo);
 			inseg += todo;
@@ -368,15 +360,13 @@
 	resid = crp->crp_payload_length;
 	crypto_cursor_init(&cc_in, &crp->crp_buf);
 	crypto_cursor_advance(&cc_in, crp->crp_payload_start);
-	inseg = crypto_cursor_segbase(&cc_in);
-	inlen = crypto_cursor_seglen(&cc_in);
+	inseg = crypto_cursor_segment(&cc_in, &inlen);
 	if (CRYPTO_HAS_OUTPUT_BUFFER(crp)) {
 		crypto_cursor_init(&cc_out, &crp->crp_obuf);
 		crypto_cursor_advance(&cc_out, crp->crp_payload_output_start);
 	} else
 		cc_out = cc_in;
-	outseg = crypto_cursor_segbase(&cc_out);
-	outlen = crypto_cursor_seglen(&cc_out);
+	outseg = crypto_cursor_segment(&cc_out, &outlen);
 	while (resid >= CHACHA_BLK_SIZE) {
 		if (inlen < CHACHA_BLK_SIZE) {
 			crypto_cursor_copydata(&cc_in, CHACHA_BLK_SIZE, block);
@@ -414,16 +404,14 @@
 
 		if (out == block) {
 			crypto_cursor_copyback(&cc_out, CHACHA_BLK_SIZE, block);
-			outseg = crypto_cursor_segbase(&cc_out);
-			outlen = crypto_cursor_seglen(&cc_out);
+			outseg = crypto_cursor_segment(&cc_out, &outlen);
 		} else {
 			crypto_cursor_advance(&cc_out, todo);
 			outseg += todo;
 			outlen -= todo;
 		}
 		if (in == block) {
-			inseg = crypto_cursor_segbase(&cc_in);
-			inlen = crypto_cursor_seglen(&cc_in);
+			inseg = crypto_cursor_segment(&cc_in, &inlen);
 		} else {
 			crypto_cursor_advance(&cc_in, todo);
 			inseg += todo;