[PATCH v15 02/20] crypto: Move storage for grub_crypto_pk_* to crypto.c

[Sudhakar Kuppusamy <sudhakar@linux.ibm.com>]

From: Daniel Axtens <dja@axtens.net>

The way gcry_rsa and friends (the asymmetric ciphers) are loaded for the
pgp module is a bit quirky.

include/grub/crypto.h contains:
  extern struct gcry_pk_spec *grub_crypto_pk_rsa;

commands/pgp.c contains the actual storage:
  struct gcry_pk_spec *grub_crypto_pk_rsa;

And the module itself saves to the storage in pgp.c:
  GRUB_MOD_INIT(gcry_rsa)
  {
    grub_crypto_pk_rsa = &_gcry_pubkey_spec_rsa;
  }

This is annoying: gcry_rsa now has a dependency on pgp!

We want to be able to bring in gcry_rsa without bringing in PGP, so move the
storage to crypto.c.

Previously, gcry_rsa depended on pgp and mpi. Now it depends on crypto and mpi.
As pgp depends on crypto, this doesn't add any new module dependencies using
the PGP verfier.

[FWIW, the story is different for the symmetric ciphers. cryptodisk and friends
(zfs encryption etc) use grub_crypto_lookup_cipher_by_name() to get a cipher
handle. That depends on grub_ciphers being populated by people calling
grub_cipher_register. import_gcry.py ensures that the symmetric ciphers call it.]

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Avnish Chouhan <avnish@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
 grub-core/commands/pgp.c | 4 ----
 grub-core/lib/crypto.c   | 4 ++++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/grub-core/commands/pgp.c b/grub-core/commands/pgp.c
index e61887862..251ed1b06 100644
--- a/grub-core/commands/pgp.c
+++ b/grub-core/commands/pgp.c
@@ -136,10 +136,6 @@ struct signature_v4_header
   grub_uint16_t hashed_sub;
 } GRUB_PACKED;
 
-struct gcry_pk_spec *grub_crypto_pk_dsa;
-struct gcry_pk_spec *grub_crypto_pk_ecdsa;
-struct gcry_pk_spec *grub_crypto_pk_rsa;
-
 struct
 {
   const char *name;
diff --git a/grub-core/lib/crypto.c b/grub-core/lib/crypto.c
index dd60dd4ac..292b747b2 100644
--- a/grub-core/lib/crypto.c
+++ b/grub-core/lib/crypto.c
@@ -170,6 +170,10 @@ grub_md_unregister (gcry_md_spec_t *cipher)
       }
 }
 
+struct gcry_pk_spec *grub_crypto_pk_dsa;
+struct gcry_pk_spec *grub_crypto_pk_ecdsa;
+struct gcry_pk_spec *grub_crypto_pk_rsa;
+
 void
 grub_crypto_hash (const gcry_md_spec_t *hash, void *out, const void *in,
 		  grub_size_t inlen)
-- 
2.50.1 (Apple Git-155)


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