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Change required by RSA-4096 support

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NIIBE Yutaka
2014-12-12 14:02:47 +09:00
parent fd8543f092
commit 8d56a4bff5
4 changed files with 18 additions and 7 deletions
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10
ChangeLog
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@@ -1,3 +1,13 @@
2014-12-03 NIIBE Yutaka <gniibe@fsij.org>
Changes for RSA-4096.
* src/gnuk.h (MAX_CMD_APDU_DATA_SIZE, MAX_RES_APDU_DATA_SIZE):
Send/Recv buffer should be bigger.
* polarssl/library/bignum.c (mpi_exp_mod): Don't consume much.
* polarssl/library/rsa.c (rsa_rsaes_pkcs1_v15_decrypt): buffer
allocation size should be variable.
2014-12-01 Niibe Yutaka <gniibe@fsij.org>
* src/Makefile.in (DEFS): Don't define compile time preference of

3
polarssl/library/bignum.c
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@@ -1545,7 +1545,8 @@ int mpi_exp_mod( mpi *X, const mpi *A, const mpi *E, const mpi *N, mpi *_RR )
{
int ret;
size_t i = mpi_msb( E );
size_t wsize = ( i > 671 ) ? 6 : ( i > 239 ) ? 5 :
size_t wsize = ( i > 1024 ) ? 4 : /* Because of not enough memory. */
( i > 671 ) ? 6 : ( i > 239 ) ? 5 :
( i > 79 ) ? 4 : ( i > 23 ) ? 3 : 1;
size_t wbits, one = 1;
size_t nblimbs;

4
polarssl/library/rsa.c
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@@ -671,14 +671,14 @@ int rsa_rsaes_pkcs1_v15_decrypt( rsa_context *ctx,
size_t ilen, pad_count = 0;
unsigned char *p, *q;
unsigned char bt;
unsigned char buf[POLARSSL_MPI_MAX_SIZE];
unsigned char buf[ctx->len];
if( ctx->padding != RSA_PKCS_V15 )
return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
ilen = ctx->len;
if( ilen < 16 || ilen > sizeof( buf ) )
if( ilen < 16)
return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
ret = ( mode == RSA_PUBLIC )

8
src/gnuk.h
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@@ -36,10 +36,10 @@ void ccid_card_change_signal (int how);
#define EV_VERIFY_CMD_AVAILABLE (8)
#define EV_MODIFY_CMD_AVAILABLE (16)
/* Maximum cmd apdu data is key import 22+4+128+128 (proc_key_import) */
#define MAX_CMD_APDU_DATA_SIZE (22+4+128+128) /* without header */
/* Maximum res apdu data is public key 5+9+256 (gpg_do_public_key) */
#define MAX_RES_APDU_DATA_SIZE (5+9+256) /* without trailer */
/* Maximum cmd apdu data is key import 24+4+256+256 (proc_key_import) */
#define MAX_CMD_APDU_DATA_SIZE (24+4+256+256) /* without header */
/* Maximum res apdu data is public key 5+9+512 (gpg_do_public_key) */
#define MAX_RES_APDU_DATA_SIZE (5+9+512) /* without trailer */
#define ICC_MSG_HEADER_SIZE 10