commit e4a6f5a7ecceb603cfdc7a2be99693f0bd0aa1eb
author Dave Rodgman <dave.rodgman@arm.com> Sat Nov 04 12:20:09 2023 +0000
committer Dave Rodgman <dave.rodgman@arm.com> Tue Nov 21 17:09:46 2023 +0000
tree f2f66f8a9f8434869c3d9d3f71f283d083f64264
parent effdfe74097b96a02ec3316f1e52e7785fb61b5d

Use size_t cast for pointer subtractions

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>

library/rsa.c

diff --git a/library/rsa.c b/library/rsa.c
index 38c3dd6..1bf5d13 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -1620,12 +1620,12 @@
         goto cleanup;
     }
 
-    if (ilen - (p - buf) > output_max_len) {
+    if (ilen - ((size_t) (p - buf)) > output_max_len) {
         ret = MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE;
         goto cleanup;
     }
 
-    *olen = ilen - (p - buf);
+    *olen = ilen - ((size_t) (p - buf));
     if (*olen != 0) {
         memcpy(output, p, *olen);
     }
@@ -2191,7 +2191,7 @@
         return MBEDTLS_ERR_RSA_INVALID_PADDING;
     }
 
-    observed_salt_len = hash_start - p;
+    observed_salt_len = (size_t) (hash_start - p);
 
     if (expected_salt_len != MBEDTLS_RSA_SALT_LEN_ANY &&
         observed_salt_len != (size_t) expected_salt_len) {