diff --git a/common/polarssl/libpcrypto.c b/common/polarssl/libpcrypto.c
index b5082849..e691c0ec 100644
--- a/common/polarssl/libpcrypto.c
+++ b/common/polarssl/libpcrypto.c
@@ -77,158 +77,6 @@ int aes_cmac8(uint8_t *iv, uint8_t *key, uint8_t *input, uint8_t *mac, int lengt
 	return 0;
 }
 
-#ifndef PUT_UINT32_BE
-#define PUT_UINT32_BE(n,b,i)                            \
-{                                                       \
-	(b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
-	(b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
-	(b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
-	(b)[(i) + 3] = (unsigned char) ( (n)       );       \
-}
-#endif
-
-/**
- * This function just returns data from rand().
- * Although predictable and often similar on multiple
- * runs, this does not result in identical random on
- * each run. So do not use this if the results of a
- * test depend on the random data that is generated.
- *
- * rng_state shall be NULL.
- */
-static int rnd_std_rand( void *rng_state, unsigned char *output, size_t len )
-{
-#if !defined(__OpenBSD__)
-	size_t i;
-
-	if( rng_state != NULL )
-		rng_state  = NULL;
-
-	for( i = 0; i < len; ++i )
-		output[i] = rand();
-#else
-	if( rng_state != NULL )
-		rng_state = NULL;
-
-	arc4random_buf( output, len );
-#endif /* !OpenBSD */
-
-	return( 0 );
-}
-
-/**
- * This function only returns zeros
- *
- * rng_state shall be NULL.
- */
-static int rnd_zero_rand( void *rng_state, unsigned char *output, size_t len )
-{
-	if( rng_state != NULL )
-		rng_state  = NULL;
-
-	memset( output, 0, len );
-
-	return( 0 );
-}
-
-typedef struct
-{
-	unsigned char *buf;
-	size_t length;
-} rnd_buf_info;
-
-/**
- * This function returns random based on a buffer it receives.
- *
- * rng_state shall be a pointer to a rnd_buf_info structure.
- *
- * The number of bytes released from the buffer on each call to
- * the random function is specified by per_call. (Can be between
- * 1 and 4)
- *
- * After the buffer is empty it will return rand();
- */
-static int rnd_buffer_rand( void *rng_state, unsigned char *output, size_t len )
-{
-	rnd_buf_info *info = (rnd_buf_info *) rng_state;
-	size_t use_len;
-
-	if( rng_state == NULL )
-		return( rnd_std_rand( NULL, output, len ) );
-
-	use_len = len;
-	if( len > info->length )
-		use_len = info->length;
-
-	if( use_len )
-	{
-		memcpy( output, info->buf, use_len );
-		info->buf += use_len;
-		info->length -= use_len;
-	}
-
-	if( len - use_len > 0 )
-		return( rnd_std_rand( NULL, output + use_len, len - use_len ) );
-
-	printf("rnd[%d] %s\n", len, sprint_hex_inrow(output, len));
-	return( 0 );
-}
-
-/**
- * Info structure for the pseudo random function
- *
- * Key should be set at the start to a test-unique value.
- * Do not forget endianness!
- * State( v0, v1 ) should be set to zero.
- */
-typedef struct
-{
-	uint32_t key[16];
-	uint32_t v0, v1;
-} rnd_pseudo_info;
-
-/**
- * This function returns random based on a pseudo random function.
- * This means the results should be identical on all systems.
- * Pseudo random is based on the XTEA encryption algorithm to
- * generate pseudorandom.
- *
- * rng_state shall be a pointer to a rnd_pseudo_info structure.
- */
-static int rnd_pseudo_rand( void *rng_state, unsigned char *output, size_t len )
-{
-	rnd_pseudo_info *info = (rnd_pseudo_info *) rng_state;
-	uint32_t i, *k, sum, delta=0x9E3779B9;
-	unsigned char result[4], *out = output;
-
-	if( rng_state == NULL )
-		return( rnd_std_rand( NULL, output, len ) );
-
-	k = info->key;
-
-	while( len > 0 )
-	{
-		size_t use_len = ( len > 4 ) ? 4 : len;
-		sum = 0;
-
-		for( i = 0; i < 32; i++ )
-		{
-			info->v0 += ( ( ( info->v1 << 4 ) ^ ( info->v1 >> 5 ) )
-							+ info->v1 ) ^ ( sum + k[sum & 3] );
-			sum += delta;
-			info->v1 += ( ( ( info->v0 << 4 ) ^ ( info->v0 >> 5 ) )
-							+ info->v0 ) ^ ( sum + k[( sum>>11 ) & 3] );
-		}
-
-		PUT_UINT32_BE( info->v0, result, 0 );
-		memcpy( out, result, use_len );
-		len -= use_len;
-		out += 4;
-	}
-
-	return( 0 );
-}
-
 #define T_PRIVATE_KEY "C477F9F65C22CCE20657FAA5B2D1D8122336F851A508A1ED04E479C34985BF96"
 #define T_Q_X         "B7E08AFDFE94BAD3F1DC8C734798BA1C62B3A0AD1E9EA2A38201CD0889BC7A19"
 #define T_Q_Y         "3603F747959DBF7A4BB226E41928729063ADC7AE43529E61B563BBC606CC5E09"
@@ -303,7 +151,6 @@ int ecdsa_signature_verify(uint8_t *key_xy, uint8_t *input, uint8_t *mac, int le
 	ret = 1;
 	goto exit;
 exit:
-	mbedtls_ctr_drbg_free(&ctr_drbg);
 	mbedtls_ecdsa_free(&ctx);
 	return ret;
 }