[gnunet] branch master updated: add pk invariant check

[gnunet]

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grothoff pushed a commit to branch master
in repository gnunet.

The following commit(s) were added to refs/heads/master by this push:
     new 63854ee52 add pk invariant check
63854ee52 is described below

commit 63854ee52ec8d24928c2346928a3dbea22ebd1fe
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Thu Nov 25 14:38:48 2021 +0100

    add pk invariant check
---
 src/include/gnunet_crypto_lib.h |  9 +++++++++
 src/util/crypto_rsa.c           | 24 ++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/src/include/gnunet_crypto_lib.h b/src/include/gnunet_crypto_lib.h
index 0eb2ea8cd..edb4bb230 100644
--- a/src/include/gnunet_crypto_lib.h
+++ b/src/include/gnunet_crypto_lib.h
@@ -2215,6 +2215,15 @@ GNUNET_CRYPTO_rsa_public_key_hash (const struct 
GNUNET_CRYPTO_RsaPublicKey *key,
                                    struct GNUNET_HashCode *hc);
 
 
+/**
+ * Check if @a key is well-formed.
+ *
+ * @return true if @a key is well-formed.
+ */
+bool
+GNUNET_CRYPTO_rsa_public_key_check (
+  const struct GNUNET_CRYPTO_RsaPublicKey *key);
+
 /**
  * Obtain the length of the RSA key in bits.
  *
diff --git a/src/util/crypto_rsa.c b/src/util/crypto_rsa.c
index f017d1f10..43e6eedac 100644
--- a/src/util/crypto_rsa.c
+++ b/src/util/crypto_rsa.c
@@ -296,6 +296,30 @@ struct GNUNET_CRYPTO_RsaPublicKeyHeaderP
 GNUNET_NETWORK_STRUCT_END
 
 
+bool
+GNUNET_CRYPTO_rsa_public_key_check (
+  const struct GNUNET_CRYPTO_RsaPublicKey *key)
+{
+  gcry_mpi_t ne[2];
+  int ret;
+
+  ret = key_from_sexp (ne,
+                       key->sexp,
+                       "public-key",
+                       "ne");
+  if (0 != ret)
+    ret = key_from_sexp (ne,
+                         key->sexp,
+                         "rsa",
+                         "ne");
+  if (0 != ret)
+    return false;
+  gcry_mpi_release (ne[0]);
+  gcry_mpi_release (ne[1]);
+  return true;
+}
+
+
 size_t
 GNUNET_CRYPTO_rsa_public_key_encode (
   const struct GNUNET_CRYPTO_RsaPublicKey *key,

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