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Require Libgcrypt 1.11.0
* configure.ac (NEED_LIBGCRYPT_VERSION): Set to 1.11.0 * agent/pkdecrypt.c (struct ecc_params): Move constants to the top. -- It does not make anymore sense to allow building with older Libgcrypt versions. After all PQ key support is a major feature and for this we need Libgcrypt.
This commit is contained in:
Werner Koch
parent
af98a3e5fa
commit
f305e703d5
@ -29,6 +29,75 @@
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#include "agent.h"
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#include "../common/openpgpdefs.h"
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/* Table with parameters for KEM decryption. Use get_ecc_parms to
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* find an entry. */
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struct ecc_params
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{
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const char *curve; /* Canonical name of the curve. */
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size_t pubkey_len; /* Pubkey in the SEXP representation. */
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size_t scalar_len;
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size_t point_len;
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size_t shared_len;
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int hash_algo;
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int algo;
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int scalar_reverse;
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};
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static const struct ecc_params ecc_table[] =
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{
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{
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"Curve25519",
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33, 32, 32, 32,
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GCRY_MD_SHA3_256, GCRY_KEM_RAW_X25519,
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1
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},
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{
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"X448",
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56, 56, 56, 64,
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GCRY_MD_SHA3_512, GCRY_KEM_RAW_X448,
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0
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},
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{
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"brainpoolP256r1",
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65, 32, 65, 32,
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GCRY_MD_SHA3_256, GCRY_KEM_RAW_BP256,
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0
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},
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{
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"brainpoolP384r1",
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97, 48, 97, 64,
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GCRY_MD_SHA3_512, GCRY_KEM_RAW_BP384,
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0
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},
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{ NULL, 0, 0, 0, 0, 0, 0, 0 }
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};
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/* Maximum buffer sizes required for ECC KEM. Keep this aligned to
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* the ecc_table above. */
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#define ECC_SCALAR_LEN_MAX 64
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#define ECC_POINT_LEN_MAX (1+2*64)
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#define ECC_HASH_LEN_MAX 64
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/* Return the ECC parameters for CURVE. CURVE is expected to be the
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* canonical name. */
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static const struct ecc_params *
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get_ecc_params (const char *curve)
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{
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int i;
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for (i = 0; ecc_table[i].curve; i++)
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if (!strcmp (ecc_table[i].curve, curve))
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return &ecc_table[i];
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return NULL;
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}
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/* DECRYPT the stuff in ciphertext which is expected to be a S-Exp.
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Try to get the key from CTRL and write the decoded stuff back to
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OUTFP. The padding information is stored at R_PADDING with -1
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@ -173,62 +242,6 @@ reverse_buffer (unsigned char *buffer, unsigned int length)
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}
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}
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struct ecc_params
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{
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const char *curve;
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size_t pubkey_len; /* Pubkey in the SEXP representation. */
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size_t scalar_len;
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size_t point_len;
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size_t shared_len;
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int hash_algo;
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int algo;
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int scalar_reverse;
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};
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static const struct ecc_params ecc_table[] =
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{
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{
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"Curve25519",
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33, 32, 32, 32,
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GCRY_MD_SHA3_256, GCRY_KEM_RAW_X25519,
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1
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},
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{
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"X448",
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56, 56, 56, 64,
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GCRY_MD_SHA3_512, GCRY_KEM_RAW_X448,
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0
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},
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{
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"brainpoolP256r1",
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65, 32, 65, 32,
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GCRY_MD_SHA3_256, GCRY_KEM_RAW_BP256,
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0
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},
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{
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"brainpoolP384r1",
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97, 48, 97, 64,
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GCRY_MD_SHA3_512, GCRY_KEM_RAW_BP384,
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0
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},
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{ NULL, 0, 0, 0, 0, 0, 0, 0 }
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};
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static const struct ecc_params *
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get_ecc_params (const char *curve)
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{
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int i;
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for (i = 0; ecc_table[i].curve; i++)
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if (!strcmp (ecc_table[i].curve, curve))
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return &ecc_table[i];
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return NULL;
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}
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#define ECC_SCALAR_LEN_MAX 64
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#define ECC_POINT_LEN_MAX (1+2*64)
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#define ECC_HASH_LEN_MAX 64
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/* For composite PGP KEM (ECC+ML-KEM), decrypt CIPHERTEXT using KEM API.
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First keygrip is for ECC, second keygrip is for PQC. CIPHERTEXT
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@ -247,7 +260,6 @@ static gpg_error_t
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composite_pgp_kem_decrypt (ctrl_t ctrl, const char *desc_text,
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gcry_sexp_t s_cipher, membuf_t *outbuf)
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{
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#if GCRYPT_VERSION_NUMBER >= 0x010b00
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gcry_sexp_t s_skey0 = NULL;
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gcry_sexp_t s_skey1 = NULL;
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unsigned char *shadow_info = NULL;
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@ -579,9 +591,6 @@ composite_pgp_kem_decrypt (ctrl_t ctrl, const char *desc_text,
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gcry_sexp_release (s_skey0);
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gcry_sexp_release (s_skey1);
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return err;
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#else
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return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
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#endif
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}
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/* DECRYPT the encrypted stuff (like encrypted session key) in
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@ -54,7 +54,6 @@ compute_kmac256 (void *digest, size_t digestlen,
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const void *custom, size_t customlen,
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gcry_buffer_t *data_iov, int data_iovlen)
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{
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#if GCRYPT_VERSION_NUMBER >= 0x010b00
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gpg_error_t err;
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gcry_buffer_t iov[20];
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const unsigned char headPAD[2] = { 1, KECCAK512_BLOCKSIZE };
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@ -142,11 +141,9 @@ compute_kmac256 (void *digest, size_t digestlen,
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err = gcry_md_hash_buffers_ext (GCRY_MD_CSHAKE256, 0,
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digest, digestlen, iov, iovcnt);
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return err;
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#else
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return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
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#endif
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}
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/* Compute KEK (shared secret) for ECC with HASHALGO, ECDH result,
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ciphertext in ECC_CT, public key in ECC_PK. */
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gpg_error_t
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@ -58,7 +58,7 @@ AC_DEFINE_UNQUOTED(GNUPG_SWDB_TAG, "gnupg26", [swdb tag for this branch])
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NEED_GPGRT_VERSION=1.46
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NEED_LIBGCRYPT_API=1
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NEED_LIBGCRYPT_VERSION=1.9.1
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NEED_LIBGCRYPT_VERSION=1.11.0
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NEED_LIBASSUAN_API=3
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NEED_LIBASSUAN_VERSION=3.0.0
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