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, 28 insertions, 20 deletions

diff --git a/pkcs1-rsa-sha256.c b/pkcs1-rsa-sha256.c
index 82c169a5..363f7847 100644
--- a/pkcs1-rsa-sha256.c
+++ b/pkcs1-rsa-sha256.c
@@ -59,32 +59,40 @@ sha256_prefix[] =
       /* Here comes the raw hash value */
 };
 
-void
-pkcs1_rsa_sha256_encode(mpz_t m, unsigned length, struct sha256_ctx *hash)
+int
+pkcs1_rsa_sha256_encode(mpz_t m, unsigned size, struct sha256_ctx *hash)
 {
   TMP_DECL(em, uint8_t, NETTLE_MAX_BIGNUM_BITS / 8);
-  TMP_ALLOC(em, length);
+  TMP_ALLOC(em, size);
 
-  assert(length >= SHA256_DIGEST_SIZE);
-  pkcs1_signature_prefix(length - SHA256_DIGEST_SIZE, em,
-			 sizeof(sha256_prefix),
-			 sha256_prefix);
-  
-  sha256_digest(hash, SHA256_DIGEST_SIZE, em + length - SHA256_DIGEST_SIZE);
-  nettle_mpz_set_str_256_u(m, length, em);
+  if (pkcs1_signature_prefix(size, em,
+			     sizeof(sha256_prefix),
+			     sha256_prefix,
+			     SHA256_DIGEST_SIZE))
+    {
+      sha256_digest(hash, SHA256_DIGEST_SIZE, em + size - SHA256_DIGEST_SIZE);
+      nettle_mpz_set_str_256_u(m, size, em);
+      return 1;
+    }
+  else
+    return 0;	
 }
 
-void
-pkcs1_rsa_sha256_encode_digest(mpz_t m, unsigned length, const uint8_t *digest)
+int
+pkcs1_rsa_sha256_encode_digest(mpz_t m, unsigned size, const uint8_t *digest)
 {
   TMP_DECL(em, uint8_t, NETTLE_MAX_BIGNUM_BITS / 8);
-  TMP_ALLOC(em, length);
+  TMP_ALLOC(em, size);
 
-  assert(length >= SHA256_DIGEST_SIZE);
-  pkcs1_signature_prefix(length - SHA256_DIGEST_SIZE, em,
-			 sizeof(sha256_prefix),
-			 sha256_prefix);
-
-  memcpy(em + length - SHA256_DIGEST_SIZE, digest, SHA256_DIGEST_SIZE);
-  nettle_mpz_set_str_256_u(m, length, em);
+  if (pkcs1_signature_prefix(size, em,
+			     sizeof(sha256_prefix),
+			     sha256_prefix,
+			     SHA256_DIGEST_SIZE))
+    {
+      memcpy(em + size - SHA256_DIGEST_SIZE, digest, SHA256_DIGEST_SIZE);
+      nettle_mpz_set_str_256_u(m, size, em);
+      return 1;
+    }
+  else
+    return 0;
 }