33 #if defined(POLARSSL_DHM_C)
38 static void polarssl_zeroize(
void *v,
size_t n ) {
39 volatile unsigned char *p = v;
while( n-- ) *p++ = 0;
45 static int dhm_read_bignum(
mpi *X,
47 const unsigned char *end )
54 n = ( (*p)[0] << 8 ) | (*p)[1];
57 if( (
int)( end - *p ) < n )
77 static int dhm_check_range(
const mpi *param,
const mpi *P )
103 const unsigned char *end )
109 if( ( ret = dhm_read_bignum( &ctx->
P, p, end ) ) != 0 ||
110 ( ret = dhm_read_bignum( &ctx->
G, p, end ) ) != 0 ||
111 ( ret = dhm_read_bignum( &ctx->
GY, p, end ) ) != 0 )
114 if( ( ret = dhm_check_range( &ctx->
GY, &ctx->
P ) ) != 0 )
129 unsigned char *output,
size_t *olen,
130 int (*f_rng)(
void *,
unsigned char *,
size_t),
153 while( dhm_check_range( &ctx->
X, &ctx->
P ) != 0 );
159 &ctx->
P , &ctx->
RP ) );
161 if( ( ret = dhm_check_range( &ctx->
GX, &ctx->
P ) ) != 0 )
167 #define DHM_MPI_EXPORT(X,n) \
168 MPI_CHK( mpi_write_binary( X, p + 2, n ) ); \
169 *p++ = (unsigned char)( n >> 8 ); \
170 *p++ = (unsigned char)( n ); p += n;
177 DHM_MPI_EXPORT( &ctx->
P , n1 );
178 DHM_MPI_EXPORT( &ctx->
G , n2 );
179 DHM_MPI_EXPORT( &ctx->
GX, n3 );
197 const unsigned char *input,
size_t ilen )
201 if( ctx == NULL || ilen < 1 || ilen > ctx->
len )
214 unsigned char *output,
size_t olen,
215 int (*f_rng)(
void *,
unsigned char *,
size_t),
220 if( ctx == NULL || olen < 1 || olen > ctx->
len )
239 while( dhm_check_range( &ctx->
X, &ctx->
P ) != 0 );
242 &ctx->
P , &ctx->
RP ) );
244 if( ( ret = dhm_check_range( &ctx->
GX, &ctx->
P ) ) != 0 )
261 unsigned char *output,
size_t *olen )
265 if( ctx == NULL || *olen < ctx->len )
269 &ctx->
P, &ctx->
RP ) );
271 if( ( ret = dhm_check_range( &ctx->
GY, &ctx->
P ) ) != 0 )
298 #if defined(POLARSSL_SELF_TEST)