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Merge pull request #952 from gilles-peskine-arm/stdio_buffering-setbuf

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Turn off stdio buffering with setbuf()
This commit is contained in:
Paul Elliott
2022-07-04 10:12:22 +01:00
committed by GitHub
parent 8b8a1610f7 c466ec2e73
commit 41aa808a56
18 changed files with 168 additions and 1 deletions
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6
library/ctr_drbg.c
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@@ -607,6 +607,9 @@ int mbedtls_ctr_drbg_write_seed_file( mbedtls_ctr_drbg_context *ctx,
if( ( f = fopen( path, "wb" ) ) == NULL )
return( MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR );
/* Ensure no stdio buffering of secrets, as such buffers cannot be wiped. */
mbedtls_setbuf( f, NULL );
if( ( ret = mbedtls_ctr_drbg_random( ctx, buf,
MBEDTLS_CTR_DRBG_MAX_INPUT ) ) != 0 )
goto exit;
@@ -640,6 +643,9 @@ int mbedtls_ctr_drbg_update_seed_file( mbedtls_ctr_drbg_context *ctx,
if( ( f = fopen( path, "rb" ) ) == NULL )
return( MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR );
/* Ensure no stdio buffering of secrets, as such buffers cannot be wiped. */
mbedtls_setbuf( f, NULL );
n = fread( buf, 1, sizeof( buf ), f );
if( fread( &c, 1, 1, f ) != 0 )
{