diff options
Diffstat (limited to 'src/crypto/rsa.c')
| -rw-r--r-- | src/crypto/rsa.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/crypto/rsa.c b/src/crypto/rsa.c index 4aba5cc30..a0bf39eb8 100644 --- a/src/crypto/rsa.c +++ b/src/crypto/rsa.c @@ -123,11 +123,15 @@ static int rsa_alloc ( struct rsa_context *context, size_t modulus_len, size_t exponent_len ) { unsigned int size = bigint_required_size ( modulus_len ); unsigned int exponent_size = bigint_required_size ( exponent_len ); + bigint_t ( size ) *modulus; + bigint_t ( exponent_size ) *exponent; + size_t tmp_len = bigint_mod_exp_tmp_len ( modulus, exponent ); struct { bigint_t ( size ) modulus; bigint_t ( exponent_size ) exponent; bigint_t ( size ) input; bigint_t ( size ) output; + uint8_t tmp[tmp_len]; } __attribute__ (( packed )) *dynamic; /* Free any existing dynamic storage */ @@ -147,6 +151,7 @@ static int rsa_alloc ( struct rsa_context *context, size_t modulus_len, context->exponent_size = exponent_size; context->input0 = &dynamic->input.element[0]; context->output0 = &dynamic->output.element[0]; + context->tmp = &dynamic->tmp; return 0; } @@ -309,7 +314,7 @@ static void rsa_cipher ( struct rsa_context *context, bigint_init ( input, in, context->max_len ); /* Perform modular exponentiation */ - bigint_mod_exp ( input, modulus, exponent, output ); + bigint_mod_exp ( input, modulus, exponent, output, context->tmp ); /* Copy out result */ bigint_done ( output, out, context->max_len ); |