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Zeroize internal buffers and variables in PKCS and SHA

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Zeroising of local buffers and variables which are used for calculations in
mbedtls_pkcs5_pbkdf2_hmac() and mbedtls_internal_sha*_process() functions
to erase sensitive data from memory.
Checked all function for possible missing zeroisation in PKCS and SHA.

Signed-off-by: gabor-mezei-arm <gabor.mezei@arm.com>
This commit is contained in:
gabor-mezei-arm 2020-07-30 16:41:25 +02:00
parent fa3b3e0d88
commit d5253bba32
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GPG key ID: 106F5A41ECC305BD
5 changed files with 37 additions and 0 deletions
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4
library/pkcs5.c
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@ -312,6 +312,10 @@ int mbedtls_pkcs5_pbkdf2_hmac( mbedtls_md_context_t *ctx, const unsigned char *p
break;
}
/* Zeroise buffers to clear sensitive data from memory. */
mbedtls_platform_zeroize( work, MBEDTLS_MD_MAX_SIZE );
mbedtls_platform_zeroize( md1, MBEDTLS_MD_MAX_SIZE );
return( 0 );
}