61 void mbedtls_hmac_drbg_init( mbedtls_hmac_drbg_context *ctx )  in mbedtls_hmac_drbg_init()  argument
63     memset( ctx, 0, sizeof( mbedtls_hmac_drbg_context ) );  in mbedtls_hmac_drbg_init()
66     mbedtls_mutex_init( &ctx->mutex );  in mbedtls_hmac_drbg_init()
73 void mbedtls_hmac_drbg_update( mbedtls_hmac_drbg_context *ctx,  in mbedtls_hmac_drbg_update()  argument
76     size_t md_len = mbedtls_md_get_size( ctx->md_ctx.md_info );  in mbedtls_hmac_drbg_update()
84         mbedtls_md_hmac_reset( &ctx->md_ctx );  in mbedtls_hmac_drbg_update()
85         mbedtls_md_hmac_update( &ctx->md_ctx, ctx->V, md_len );  in mbedtls_hmac_drbg_update()
86         mbedtls_md_hmac_update( &ctx->md_ctx, sep, 1 );  in mbedtls_hmac_drbg_update()
88             mbedtls_md_hmac_update( &ctx->md_ctx, additional, add_len );  in mbedtls_hmac_drbg_update()
89         mbedtls_md_hmac_finish( &ctx->md_ctx, K );  in mbedtls_hmac_drbg_update()
92         mbedtls_md_hmac_starts( &ctx->md_ctx, K, md_len );  in mbedtls_hmac_drbg_update()
93         mbedtls_md_hmac_update( &ctx->md_ctx, ctx->V, md_len );  in mbedtls_hmac_drbg_update()
94         mbedtls_md_hmac_finish( &ctx->md_ctx, ctx->V );  in mbedtls_hmac_drbg_update()
101 int mbedtls_hmac_drbg_seed_buf( mbedtls_hmac_drbg_context *ctx,  in mbedtls_hmac_drbg_seed_buf()  argument
107     if( ( ret = mbedtls_md_setup( &ctx->md_ctx, md_info, 1 ) ) != 0 )  in mbedtls_hmac_drbg_seed_buf()
115     mbedtls_md_hmac_starts( &ctx->md_ctx, ctx->V, mbedtls_md_get_size( md_info ) );  in mbedtls_hmac_drbg_seed_buf()
116     memset( ctx->V, 0x01, mbedtls_md_get_size( md_info ) );  in mbedtls_hmac_drbg_seed_buf()
118     mbedtls_hmac_drbg_update( ctx, data, data_len );  in mbedtls_hmac_drbg_seed_buf()
126 int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx,  in mbedtls_hmac_drbg_reseed()  argument
134         ctx->entropy_len + len > MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT )  in mbedtls_hmac_drbg_reseed()
142     if( ctx->f_entropy( ctx->p_entropy, seed, ctx->entropy_len ) != 0 )  in mbedtls_hmac_drbg_reseed()
145     seedlen = ctx->entropy_len;  in mbedtls_hmac_drbg_reseed()
155     mbedtls_hmac_drbg_update( ctx, seed, seedlen );  in mbedtls_hmac_drbg_reseed()
158     ctx->reseed_counter = 1;  in mbedtls_hmac_drbg_reseed()
167 int mbedtls_hmac_drbg_seed( mbedtls_hmac_drbg_context *ctx,  in mbedtls_hmac_drbg_seed()  argument
177     if( ( ret = mbedtls_md_setup( &ctx->md_ctx, md_info, 1 ) ) != 0 )  in mbedtls_hmac_drbg_seed()
187     mbedtls_md_hmac_starts( &ctx->md_ctx, ctx->V, md_size );  in mbedtls_hmac_drbg_seed()
188     memset( ctx->V, 0x01, md_size );  in mbedtls_hmac_drbg_seed()
190     ctx->f_entropy = f_entropy;  in mbedtls_hmac_drbg_seed()
191     ctx->p_entropy = p_entropy;  in mbedtls_hmac_drbg_seed()
193     ctx->reseed_interval = MBEDTLS_HMAC_DRBG_RESEED_INTERVAL;  in mbedtls_hmac_drbg_seed()
210     ctx->entropy_len = entropy_len * 3 / 2;  in mbedtls_hmac_drbg_seed()
212     if( ( ret = mbedtls_hmac_drbg_reseed( ctx, custom, len ) ) != 0 )  in mbedtls_hmac_drbg_seed()
215     ctx->entropy_len = entropy_len;  in mbedtls_hmac_drbg_seed()
223 void mbedtls_hmac_drbg_set_prediction_resistance( mbedtls_hmac_drbg_context *ctx,  in mbedtls_hmac_drbg_set_prediction_resistance()  argument
226     ctx->prediction_resistance = resistance;  in mbedtls_hmac_drbg_set_prediction_resistance()
232 void mbedtls_hmac_drbg_set_entropy_len( mbedtls_hmac_drbg_context *ctx, size_t len )  in mbedtls_hmac_drbg_set_entropy_len()  argument
234     ctx->entropy_len = len;  in mbedtls_hmac_drbg_set_entropy_len()
240 void mbedtls_hmac_drbg_set_reseed_interval( mbedtls_hmac_drbg_context *ctx, int interval )  in mbedtls_hmac_drbg_set_reseed_interval()  argument
242     ctx->reseed_interval = interval;  in mbedtls_hmac_drbg_set_reseed_interval()
254     mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;  in mbedtls_hmac_drbg_random_with_add()  local
255     size_t md_len = mbedtls_md_get_size( ctx->md_ctx.md_info );  in mbedtls_hmac_drbg_random_with_add()
268     if( ctx->f_entropy != NULL && /* For no-reseeding instances */  in mbedtls_hmac_drbg_random_with_add()
269         ( ctx->prediction_resistance == MBEDTLS_HMAC_DRBG_PR_ON ||  in mbedtls_hmac_drbg_random_with_add()
270           ctx->reseed_counter > ctx->reseed_interval ) )  in mbedtls_hmac_drbg_random_with_add()
272         if( ( ret = mbedtls_hmac_drbg_reseed( ctx, additional, add_len ) ) != 0 )  in mbedtls_hmac_drbg_random_with_add()
280         mbedtls_hmac_drbg_update( ctx, additional, add_len );  in mbedtls_hmac_drbg_random_with_add()
287         mbedtls_md_hmac_reset( &ctx->md_ctx );  in mbedtls_hmac_drbg_random_with_add()
288         mbedtls_md_hmac_update( &ctx->md_ctx, ctx->V, md_len );  in mbedtls_hmac_drbg_random_with_add()
289         mbedtls_md_hmac_finish( &ctx->md_ctx, ctx->V );  in mbedtls_hmac_drbg_random_with_add()
291         memcpy( out, ctx->V, use_len );  in mbedtls_hmac_drbg_random_with_add()
297     mbedtls_hmac_drbg_update( ctx, additional, add_len );  in mbedtls_hmac_drbg_random_with_add()
300     ctx->reseed_counter++;  in mbedtls_hmac_drbg_random_with_add()
312     mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;  in mbedtls_hmac_drbg_random()  local
315     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )  in mbedtls_hmac_drbg_random()
319     ret = mbedtls_hmac_drbg_random_with_add( ctx, output, out_len, NULL, 0 );  in mbedtls_hmac_drbg_random()
322     if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )  in mbedtls_hmac_drbg_random()
332 void mbedtls_hmac_drbg_free( mbedtls_hmac_drbg_context *ctx )  in mbedtls_hmac_drbg_free()  argument
334     if( ctx == NULL )  in mbedtls_hmac_drbg_free()
338     mbedtls_mutex_free( &ctx->mutex );  in mbedtls_hmac_drbg_free()
340     mbedtls_md_free( &ctx->md_ctx );  in mbedtls_hmac_drbg_free()
341     mbedtls_zeroize( ctx, sizeof( mbedtls_hmac_drbg_context ) );  in mbedtls_hmac_drbg_free()
345 int mbedtls_hmac_drbg_write_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )  in mbedtls_hmac_drbg_write_seed_file()  argument
354     if( ( ret = mbedtls_hmac_drbg_random( ctx, buf, sizeof( buf ) ) ) != 0 )  in mbedtls_hmac_drbg_write_seed_file()
370 int mbedtls_hmac_drbg_update_seed_file( mbedtls_hmac_drbg_context *ctx, const char *path )  in mbedtls_hmac_drbg_update_seed_file()  argument
397     mbedtls_hmac_drbg_update( ctx, buf, n );  in mbedtls_hmac_drbg_update_seed_file()
399     return( mbedtls_hmac_drbg_write_seed_file( ctx, path ) );  in mbedtls_hmac_drbg_update_seed_file()
471     mbedtls_hmac_drbg_context ctx;  in mbedtls_hmac_drbg_self_test()  local
475     mbedtls_hmac_drbg_init( &ctx );  in mbedtls_hmac_drbg_self_test()
484     CHK( mbedtls_hmac_drbg_seed( &ctx, md_info,  in mbedtls_hmac_drbg_self_test()
487     mbedtls_hmac_drbg_set_prediction_resistance( &ctx, MBEDTLS_HMAC_DRBG_PR_ON );  in mbedtls_hmac_drbg_self_test()
488     CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );  in mbedtls_hmac_drbg_self_test()
489     CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );  in mbedtls_hmac_drbg_self_test()
491     mbedtls_hmac_drbg_free( &ctx );  in mbedtls_hmac_drbg_self_test()
493     mbedtls_hmac_drbg_free( &ctx );  in mbedtls_hmac_drbg_self_test()
504     mbedtls_hmac_drbg_init( &ctx );  in mbedtls_hmac_drbg_self_test()
507     CHK( mbedtls_hmac_drbg_seed( &ctx, md_info,  in mbedtls_hmac_drbg_self_test()
510     CHK( mbedtls_hmac_drbg_reseed( &ctx, NULL, 0 ) );  in mbedtls_hmac_drbg_self_test()
511     CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );  in mbedtls_hmac_drbg_self_test()
512     CHK( mbedtls_hmac_drbg_random( &ctx, buf, OUTPUT_LEN ) );  in mbedtls_hmac_drbg_self_test()
514     mbedtls_hmac_drbg_free( &ctx );  in mbedtls_hmac_drbg_self_test()
516     mbedtls_hmac_drbg_free( &ctx );  in mbedtls_hmac_drbg_self_test()