Use size_t rather than unsigned for randomness related functions.

knuth-lfib.c

@@ -117,7 +117,7 @@ knuth_lfib_get(struct knuth_lfib_ctx *ctx)
 /* NOTE: Not at all optimized. */
 void
 knuth_lfib_get_array(struct knuth_lfib_ctx *ctx,
-		     unsigned n, uint32_t *a)
+		     size_t n, uint32_t *a)
 {
   unsigned i;
   
@@ -128,7 +128,7 @@ knuth_lfib_get_array(struct knuth_lfib_ctx *ctx,
 /* NOTE: Not at all optimized. */
 void
 knuth_lfib_random(struct knuth_lfib_ctx *ctx,
-		  unsigned n, uint8_t *dst)
+		  size_t n, uint8_t *dst)
 {
   /* Use 24 bits from each number, xoring together some of the
      bits. */

knuth-lfib.h

@@ -61,12 +61,12 @@ knuth_lfib_get(struct knuth_lfib_ctx *ctx);
 /* Get an array of numbers */
 void
 knuth_lfib_get_array(struct knuth_lfib_ctx *ctx,
-		     unsigned n, uint32_t *a);
+		     size_t n, uint32_t *a);
 
 /* Get an array of octets. */
 void
 knuth_lfib_random(struct knuth_lfib_ctx *ctx,
-		  unsigned n, uint8_t *dst);
+		  size_t n, uint8_t *dst);
 
 #ifdef __cplusplus
 }

nettle-types.h

@@ -34,7 +34,7 @@ extern "C" {
 
 /* Randomness. Used by key generation and dsa signature creation. */
 typedef void nettle_random_func(void *ctx,
-				unsigned length, uint8_t *dst);
+				size_t length, uint8_t *dst);
 
 /* Progress report function, mainly for key generation. */
 typedef void nettle_progress_func(void *ctx, int c);

yarrow.h

@@ -87,17 +87,17 @@ yarrow256_init(struct yarrow256_ctx *ctx,
 
 void
 yarrow256_seed(struct yarrow256_ctx *ctx,
-	       unsigned length,
+	       size_t length,
 	       const uint8_t *seed_file);
 
 /* Returns 1 on reseed */
 int
 yarrow256_update(struct yarrow256_ctx *ctx,
 		 unsigned source, unsigned entropy,
-		 unsigned length, const uint8_t *data);
+		 size_t length, const uint8_t *data);
 
 void
-yarrow256_random(struct yarrow256_ctx *ctx, unsigned length, uint8_t *dst);
+yarrow256_random(struct yarrow256_ctx *ctx, size_t length, uint8_t *dst);
 
 int
 yarrow256_is_seeded(struct yarrow256_ctx *ctx);

yarrow256.c

@@ -101,7 +101,7 @@ yarrow256_init(struct yarrow256_ctx *ctx,
 
 void
 yarrow256_seed(struct yarrow256_ctx *ctx,
-	       unsigned length,
+	       size_t length,
 	       const uint8_t *seed_file)
 {
   assert(length > 0);
@@ -228,7 +228,7 @@ yarrow256_slow_reseed(struct yarrow256_ctx *ctx)
 int
 yarrow256_update(struct yarrow256_ctx *ctx,
 		 unsigned source_index, unsigned entropy,
-		 unsigned length, const uint8_t *data)
+		 size_t length, const uint8_t *data)
 {
   enum yarrow_pool_id current;
   struct yarrow_source *source;
@@ -315,7 +315,7 @@ yarrow_gate(struct yarrow256_ctx *ctx)
 }
 
 void
-yarrow256_random(struct yarrow256_ctx *ctx, unsigned length, uint8_t *dst)
+yarrow256_random(struct yarrow256_ctx *ctx, size_t length, uint8_t *dst)
 {
   assert(ctx->seeded);