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Merge pull request #772 from chris-jones-arm/development-restricted

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Fix Diffie-Hellman large key size DoS
This commit is contained in:
Janos Follath
2020-12-07 09:28:55 +00:00
committed by GitHub
parent 227366b4b0 e64a46f466
commit 7973e2b358
6 changed files with 103 additions and 1 deletions
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4
library/bignum.c
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@@ -2115,6 +2115,10 @@ int mbedtls_mpi_exp_mod( mbedtls_mpi *X, const mbedtls_mpi *A,
if( mbedtls_mpi_cmp_int( E, 0 ) < 0 )
return( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
if( mbedtls_mpi_bitlen( E ) > MBEDTLS_MPI_MAX_BITS ||
mbedtls_mpi_bitlen( N ) > MBEDTLS_MPI_MAX_BITS )
return ( MBEDTLS_ERR_MPI_BAD_INPUT_DATA );
/*
* Init temps and window size
*/