33 #if defined(POLARSSL_DHM_C)
37 #if defined(POLARSSL_PEM_PARSE_C)
41 #if defined(POLARSSL_ASN1_PARSE_C)
45 #if defined(POLARSSL_MEMORY_C)
49 #define polarssl_malloc malloc
50 #define polarssl_free free
56 static int dhm_read_bignum(
mpi *X,
58 const unsigned char *end )
65 n = ( (*p)[0] << 8 ) | (*p)[1];
68 if( (
int)( end - *p ) < n )
88 static int dhm_check_range(
const mpi *param,
const mpi *P )
113 const unsigned char *end )
119 if( ( ret = dhm_read_bignum( &ctx->
P, p, end ) ) != 0 ||
120 ( ret = dhm_read_bignum( &ctx->
G, p, end ) ) != 0 ||
121 ( ret = dhm_read_bignum( &ctx->
GY, p, end ) ) != 0 )
124 if( ( ret = dhm_check_range( &ctx->
GY, &ctx->
P ) ) != 0 )
136 unsigned char *output,
size_t *olen,
137 int (*f_rng)(
void *,
unsigned char *,
size_t),
160 while( dhm_check_range( &ctx->
X, &ctx->
P ) != 0 );
166 &ctx->
P , &ctx->
RP ) );
168 if( ( ret = dhm_check_range( &ctx->
GX, &ctx->
P ) ) != 0 )
174 #define DHM_MPI_EXPORT(X,n) \
175 MPI_CHK( mpi_write_binary( X, p + 2, n ) ); \
176 *p++ = (unsigned char)( n >> 8 ); \
177 *p++ = (unsigned char)( n ); p += n;
184 DHM_MPI_EXPORT( &ctx->
P , n1 );
185 DHM_MPI_EXPORT( &ctx->
G , n2 );
186 DHM_MPI_EXPORT( &ctx->
GX, n3 );
204 const unsigned char *input,
size_t ilen )
208 if( ctx == NULL || ilen < 1 || ilen > ctx->
len )
221 unsigned char *output,
size_t olen,
222 int (*f_rng)(
void *,
unsigned char *,
size_t),
227 if( ctx == NULL || olen < 1 || olen > ctx->
len )
246 while( dhm_check_range( &ctx->
X, &ctx->
P ) != 0 );
249 &ctx->
P , &ctx->
RP ) );
251 if( ( ret = dhm_check_range( &ctx->
GX, &ctx->
P ) ) != 0 )
271 int (*f_rng)(
void *,
unsigned char *,
size_t),
void *p_rng )
333 unsigned char *output,
size_t *olen,
334 int (*f_rng)(
void *,
unsigned char *,
size_t),
340 if( ctx == NULL || *olen < ctx->len )
343 if( ( ret = dhm_check_range( &ctx->
GY, &ctx->
P ) ) != 0 )
351 MPI_CHK( dhm_update_blinding( ctx, f_rng, p_rng ) );
360 &ctx->
P, &ctx->
RP ) );
395 #if defined(POLARSSL_ASN1_PARSE_C)
403 unsigned char *p, *end;
404 #if defined(POLARSSL_PEM_PARSE_C)
410 ret = pem_read_buffer( &pem,
411 "-----BEGIN DH PARAMETERS-----",
412 "-----END DH PARAMETERS-----",
413 dhmin, NULL, 0, &dhminlen );
420 dhminlen = pem.buflen;
425 p = ( ret == 0 ) ? pem.buf : (
unsigned char *) dhmin;
427 p = (
unsigned char *) dhmin;
463 #if defined(POLARSSL_PEM_PARSE_C)
472 #if defined(POLARSSL_FS_IO)
476 static int load_file(
const char *path,
unsigned char **buf,
size_t *n )
481 if( ( f = fopen( path,
"rb" ) ) == NULL )
484 fseek( f, 0, SEEK_END );
485 if( ( size = ftell( f ) ) == -1 )
490 fseek( f, 0, SEEK_SET );
501 if( fread( *buf, 1, *n, f ) != *n )
524 if ( ( ret = load_file( path, &buf, &n ) ) != 0 )
529 memset( buf, 0, n + 1 );
537 #if defined(POLARSSL_SELF_TEST)
546 #if defined(POLARSSL_CERTS_C)
551 printf(
" DHM parameter load: " );
553 if( ( ret =
dhm_parse_dhm( &dhm, (
const unsigned char *) test_dhm_params,
554 strlen( test_dhm_params ) ) ) != 0 )
557 printf(
"failed\n" );
563 printf(
"passed\n\n" );