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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Fri, 2 Oct 2020 10:49:26 +1000
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Subject: [PATCH] crypto: move storage for grub_crypto_pk_* to crypto.c
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The way gcry_rsa and friends (the asymmetric ciphers) are loaded for the
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pgp module is a bit quirky.
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include/grub/crypto.h contains:
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extern struct gcry_pk_spec *grub_crypto_pk_rsa;
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commands/pgp.c contains the actual storage:
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struct gcry_pk_spec *grub_crypto_pk_rsa;
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And the module itself saves to the storage in pgp.c:
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GRUB_MOD_INIT(gcry_rsa)
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{
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grub_crypto_pk_rsa = &_gcry_pubkey_spec_rsa;
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}
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This is annoying: gcry_rsa now has a dependency on pgp!
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We want to be able to bring in gcry_rsa without bringing in PGP,
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so move the storage to crypto.c.
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Previously, gcry_rsa depended on pgp and mpi. Now it depends on
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crypto and mpi. As pgp depends on crypto, this doesn't add any new
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module dependencies using the PGP verfier.
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[FWIW, the story is different for the symmetric ciphers. cryptodisk
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and friends (zfs encryption etc) use grub_crypto_lookup_cipher_by_name()
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to get a cipher handle. That depends on grub_ciphers being populated
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by people calling grub_cipher_register. import_gcry.py ensures that the
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symmetric ciphers call it.]
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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---
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grub-core/commands/pgp.c | 4 ----
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grub-core/lib/crypto.c | 4 ++++
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2 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/grub-core/commands/pgp.c b/grub-core/commands/pgp.c
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index 2408db4994..355a43844a 100644
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--- a/grub-core/commands/pgp.c
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+++ b/grub-core/commands/pgp.c
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@@ -147,10 +147,6 @@ const char *hashes[] = {
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[0x0b] = "sha224"
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};
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-struct gcry_pk_spec *grub_crypto_pk_dsa;
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-struct gcry_pk_spec *grub_crypto_pk_ecdsa;
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-struct gcry_pk_spec *grub_crypto_pk_rsa;
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-
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static int
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dsa_pad (gcry_mpi_t *hmpi, grub_uint8_t *hval,
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const gcry_md_spec_t *hash, struct grub_public_subkey *sk);
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diff --git a/grub-core/lib/crypto.c b/grub-core/lib/crypto.c
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index ca334d5a40..c578128a59 100644
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--- a/grub-core/lib/crypto.c
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+++ b/grub-core/lib/crypto.c
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@@ -121,6 +121,10 @@ grub_md_unregister (gcry_md_spec_t *cipher)
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}
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}
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+struct gcry_pk_spec *grub_crypto_pk_dsa;
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+struct gcry_pk_spec *grub_crypto_pk_ecdsa;
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+struct gcry_pk_spec *grub_crypto_pk_rsa;
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+
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void
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grub_crypto_hash (const gcry_md_spec_t *hash, void *out, const void *in,
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grub_size_t inlen)
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