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Explain the choice of the value of MBEDTLS_MPI_IS_PUBLIC

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Signed-off-by: Janos Follath <[email protected]>
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Janos Follath
2024-09-02 10:30:47 +02:00
committed by Manuel Pégourié-Gonnard
parent e86607c498
commit 2f8ad595db
1 changed files with 4 additions and 1 deletions
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library/bignum_core.h
+4 -1
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@@ -107,7 +107,10 @@
* // safe path
* }
* not the other way round, in order to prevent misuse. (This is, if a value
* other than the two below is passed, default to the safe path.) */
* other than the two below is passed, default to the safe path.)
*
* The value of MBEDTLS_MPI_IS_PUBLIC is chosen in a way that is unlikely to happen by accident, but
* which can be used as an immediate value in a Thumb2 comparison (for code size). */
#define MBEDTLS_MPI_IS_PUBLIC 0x2a2a2a2a
#define MBEDTLS_MPI_IS_SECRET 0
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)