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gpg,ecc: Handle external representation as SOS with opaque MPI.

Browse source 
* g10/pkglue.h (sexp_extract_param_sos): New.
* g10/build-packet.c (sos_write): New.
(do_key, do_pubkey_enc, do_signature): Use sos_write for ECC.
* g10/export.c (cleartext_secret_key_to_openpgp): Use
sexp_extract_param_sos.
(transfer_format_to_openpgp): Use opaque MPI for ECC.
* g10/keygen.c (ecckey_from_sexp): Use sexp_extract_param_sos.
* g10/keyid.c (hash_public_key): Handle opaque MPI for SOS.
* g10/parse-packet.c (sos_read): New.
(parse_pubkeyenc,parse_signature,parse_key): Use sos_read for ECC.
* g10/pkglue.c (sexp_extract_param_sos): New.
(pk_verify): Handle opaque MPI for SOS.
(pk_encrypt): Use sexp_extract_param_sos.
* g10/seskey.c (encode_session_key): Use opaque MPI.
* g10/sign.c (do_sign): Use sexp_extract_param_sos.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2020-06-09 10:32:47 +09:00
parent 5c2080f467
commit f5bc945554
9 changed files with 316 additions and 59 deletions
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11
g10/seskey.c
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@ -82,7 +82,6 @@ encode_session_key (int openpgp_pk_algo, DEK *dek, unsigned int nbits)
byte *frame;
int i,n;
u16 csum;
gcry_mpi_t a;
if (DBG_CRYPTO)
log_debug ("encode_session_key: encoding %d byte DEK", dek->keylen);
@ -124,10 +123,7 @@ encode_session_key (int openpgp_pk_algo, DEK *dek, unsigned int nbits)
(int) nframe, frame[0], frame[1], frame[2],
frame[nframe-3], frame[nframe-2], frame[nframe-1]);
if (gcry_mpi_scan (&a, GCRYMPI_FMT_USG, frame, nframe, &nframe))
BUG();
xfree(frame);
return a;
return gcry_mpi_set_opaque (NULL, frame, 8*nframe);
}
/* The current limitation is that we can only use a session key
@ -195,10 +191,7 @@ encode_session_key (int openpgp_pk_algo, DEK *dek, unsigned int nbits)
frame[n++] = csum >>8;
frame[n++] = csum;
log_assert (n == nframe);
if (gcry_mpi_scan( &a, GCRYMPI_FMT_USG, frame, n, &nframe))
BUG();
xfree (frame);
return a;
return gcry_mpi_set_opaque (NULL, frame, 8*n);
}