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Merge pull request #7933 from tom-cosgrove-arm/add-mbedtls_zeroize_and_free

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Provide and use internal function mbedtls_zeroize_and_free()
This commit is contained in:
Dave Rodgman
2023-08-03 12:56:21 +00:00
committed by GitHub
parent ce64156f6d 52f7e18042
commit 1d4d944e19
24 changed files with 90 additions and 141 deletions
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14
library/common.h
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@ -114,6 +114,20 @@ extern void (*mbedtls_test_hook_test_fail)(const char *test, int line, const cha
*/
#define MBEDTLS_ALLOW_PRIVATE_ACCESS
/**
* \brief Securely zeroize a buffer then free it.
*
* Similar to making consecutive calls to
* \c mbedtls_platform_zeroize() and \c mbedtls_free(), but has
* code size savings, and potential for optimisation in the future.
*
* Guaranteed to be a no-op if \p buf is \c NULL and \p len is 0.
*
* \param buf Buffer to be zeroized then freed.
* \param len Length of the buffer in bytes
*/
void mbedtls_zeroize_and_free(void *buf, size_t len);
/** Return an offset into a buffer.
*
* This is just the addition of an offset to a pointer, except that this