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See ChangeLog: Mon Jan 24 13:04:28 CET 2000 Werner Koch

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This commit is contained in:
Werner Koch 2000-01-24 11:55:49 +00:00
parent 704eb738c0
commit 0070faa0ff
88 changed files with 887 additions and 3998 deletions
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73
mpi/mpicoder.c
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@ -221,8 +221,8 @@ do_get_buffer( MPI a, unsigned *nbytes, int *sign, int force_secure )
if( sign )
*sign = a->sign;
*nbytes = a->nlimbs * BYTES_PER_MPI_LIMB;
p = buffer = force_secure || mpi_is_secure(a) ? m_alloc_secure( *nbytes)
: m_alloc( *nbytes );
p = buffer = force_secure || mpi_is_secure(a) ? g10_xmalloc_secure( *nbytes)
: g10_xmalloc( *nbytes );
for(i=a->nlimbs-1; i >= 0; i-- ) {
alimb = a->d[i];
@ -340,6 +340,7 @@ gcry_mpi_scan( struct gcry_mpi **ret_mpi, enum gcry_mpi_format format,
/* TODO: add a way to allocate the MPI in secure memory
* Hmmm: maybe it is better to retrieve this information from
* the provided buffer. */
#warning secure memory is not used here.
if( format == GCRYMPI_FMT_STD ) {
const byte *s = buffer;
@ -458,7 +459,7 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
}
if( n > len && buffer ) {
m_free(tmp);
g10_free(tmp);
return GCRYERR_TOO_SHORT; /* the provided buffer is too short */
}
if( buffer ) {
@ -468,7 +469,24 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
memcpy( s, tmp, n-extra );
}
m_free(tmp);
g10_free(tmp);
*nbytes = n;
return 0;
}
else if( format == GCRYMPI_FMT_USG ) {
unsigned int n = (nbits + 7)/8;
/* we ignore the sign for this format */
/* FIXME: for performance reasons we should put this into
* mpi_aprint becuase we can then use the buffer directly */
if( n > len && buffer )
return GCRYERR_TOO_SHORT; /* the provided buffer is too short */
if( buffer ) {
char *tmp;
tmp = mpi_get_buffer( a, &n, NULL );
memcpy( buffer, tmp, n );
g10_free(tmp);
}
*nbytes = n;
return 0;
}
@ -488,7 +506,7 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
tmp = mpi_get_buffer( a, &n, NULL );
memcpy( s+2, tmp, n );
m_free(tmp);
g10_free(tmp);
}
*nbytes = n+2;
return 0;
@ -508,7 +526,7 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
}
if( n+4 > len && buffer ) {
m_free(tmp);
g10_free(tmp);
return GCRYERR_TOO_SHORT; /* the provided buffer is too short */
}
if( buffer ) {
@ -522,7 +540,7 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
memcpy( s, tmp, n-extra );
}
m_free(tmp);
g10_free(tmp);
*nbytes = 4+n;
return 0;
}
@ -534,10 +552,10 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
tmp = mpi_get_buffer( a, &n, NULL );
if( !n || (*tmp & 0x80) )
extra=1;
extra=2;
if( 2*n+3+1 > len && buffer ) {
m_free(tmp);
if( 2*n + extra + !!a->sign + 1 > len && buffer ) {
g10_free(tmp);
return GCRYERR_TOO_SHORT; /* the provided buffer is too short */
}
if( buffer ) {
@ -559,17 +577,38 @@ gcry_mpi_print( enum gcry_mpi_format format, char *buffer, size_t *nbytes,
*nbytes = (char*)s - buffer;
}
else {
*nbytes = n;
if( a->sign )
++*nbytes;
if( extra )
*nbytes += 2;
++*nbytes; /* terminating Nul */
*nbytes = 2*n + extra + !!a->sign + 1;
}
m_free(tmp);
g10_free(tmp);
return 0;
}
else
return GCRYERR_INV_ARG;
}
/****************
* Like gcry_mpi_print but this function allocates the buffer itself.
* The caller has to supply the address of a pointer. nbytes may be
* NULL.
*/
int
gcry_mpi_aprint( enum gcry_mpi_format format, void **buffer, size_t *nbytes,
struct gcry_mpi *a )
{
size_t n;
int rc;
*buffer = NULL;
rc = gcry_mpi_print( format, NULL, &n, a );
if( rc )
return rc;
*buffer = mpi_is_secure(a) ? g10_xmalloc_secure( n ) : g10_xmalloc( n );
rc = gcry_mpi_print( format, *buffer, &n, a );
if( rc ) {
g10_free(*buffer);
*buffer = NULL;
}
return rc;
}