Interface change, let all rsa signature functions have a return value.

Rev: nettle/ChangeLog:1.54
Rev: nettle/NEWS:1.4
Rev: nettle/examples/rsa-sign.c:1.2
Rev: nettle/pgp-encode.c:1.3
Rev: nettle/pkcs1-rsa-md5.c:1.3
Rev: nettle/pkcs1-rsa-sha1.c:1.3
Rev: nettle/pkcs1-rsa-sha256.c:1.3
Rev: nettle/pkcs1-rsa-sha512.c:1.2
Rev: nettle/pkcs1.c:1.3
Rev: nettle/pkcs1.h:1.3
Rev: nettle/rsa-compat.c:1.3
Rev: nettle/rsa-md5-sign.c:1.3
Rev: nettle/rsa-md5-verify.c:1.3
Rev: nettle/rsa-sha1-sign.c:1.3
Rev: nettle/rsa-sha1-verify.c:1.3
Rev: nettle/rsa-sha256-sign.c:1.3
Rev: nettle/rsa-sha256-verify.c:1.3
Rev: nettle/rsa-sha512-sign.c:1.2
Rev: nettle/rsa-sha512-verify.c:1.2
Rev: nettle/rsa.h:1.4
Rev: nettle/testsuite/cxx-test.cxx:1.3
Rev: nettle/testsuite/pkcs1-test.c:1.3
Rev: nettle/testsuite/testutils.c:1.5

1 files changed, 24 insertions, 10 deletions

diff --git a/rsa-sha512-sign.c b/rsa-sha512-sign.c
index 2d0981d8..fa14487d 100644
--- a/rsa-sha512-sign.c
+++ b/rsa-sha512-sign.c
@@ -34,26 +34,40 @@
 #include "bignum.h"
 #include "pkcs1.h"
 
-void
+int
 rsa_sha512_sign(const struct rsa_private_key *key,
 		struct sha512_ctx *hash,
 		mpz_t s)
 {
-  assert(key->size >= RSA_MINIMUM_N_OCTETS);
+  assert(key->size > 0);
 
-  pkcs1_rsa_sha512_encode(s, key->size - 1, hash);
-
-  rsa_compute_root(key, s, s);
+  if (pkcs1_rsa_sha512_encode(s, key->size - 1, hash))
+    {
+      rsa_compute_root(key, s, s);
+      return 1;
+    }
+  else
+    {
+      mpz_set_ui(s, 0);
+      return 0;
+    }  
 }
 
-void
+int
 rsa_sha512_sign_digest(const struct rsa_private_key *key,
 		       const uint8_t *digest,
 		       mpz_t s)
 {
-  assert(key->size >= RSA_MINIMUM_N_OCTETS);
-
-  pkcs1_rsa_sha512_encode_digest(s, key->size - 1, digest);
+  assert(key->size > 0);
 
-  rsa_compute_root(key, s, s);
+  if (pkcs1_rsa_sha512_encode_digest(s, key->size - 1, digest))
+    {
+      rsa_compute_root(key, s, s);
+      return 1;
+    }
+  else
+    {
+      mpz_set_ui(s, 0);
+      return 0;
+    }  
 }