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Merge remote-tracking branch 'hanno/sliding_exponentiation' into development

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* hanno/sliding_exponentiation:
  Adapt ChangeLog
  Abort modular inversion when modulus is one.
  Correct sign in modular exponentiation algorithm.
This commit is contained in:
Manuel Pégourié-Gonnard
2017-06-08 19:46:30 +02:00
parent e778441312 072e806a07
commit 1178ac5e77
4 changed files with 12 additions and 5 deletions
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4
include/mbedtls/bignum.h
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@ -665,8 +665,8 @@ int mbedtls_mpi_gcd( mbedtls_mpi *G, const mbedtls_mpi *A, const mbedtls_mpi *B
*
* \return 0 if successful,
* MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed,
* MBEDTLS_ERR_MPI_BAD_INPUT_DATA if N is negative or nil
MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N
* MBEDTLS_ERR_MPI_BAD_INPUT_DATA if N is <= 1,
MBEDTLS_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N.
*/
int mbedtls_mpi_inv_mod( mbedtls_mpi *X, const mbedtls_mpi *A, const mbedtls_mpi *N );