summaryrefslogtreecommitdiffstats
path: root/crypto/openssl/crypto/rsa/rsa_eay.c
diff options
context:
space:
mode:
Diffstat (limited to 'crypto/openssl/crypto/rsa/rsa_eay.c')
-rw-r--r--crypto/openssl/crypto/rsa/rsa_eay.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/crypto/openssl/crypto/rsa/rsa_eay.c b/crypto/openssl/crypto/rsa/rsa_eay.c
index 62618fe..3e38320 100644
--- a/crypto/openssl/crypto/rsa/rsa_eay.c
+++ b/crypto/openssl/crypto/rsa/rsa_eay.c
@@ -443,13 +443,14 @@ err:
static int RSA_eay_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
{
- BIGNUM r1,m1;
+ BIGNUM r1,m1,vrfy;
int ret=0;
BN_CTX *ctx;
if ((ctx=BN_CTX_new()) == NULL) goto err;
BN_init(&m1);
BN_init(&r1);
+ BN_init(&vrfy);
if (rsa->flags & RSA_FLAG_CACHE_PRIVATE)
{
@@ -530,10 +531,19 @@ static int RSA_eay_mod_exp(BIGNUM *r0, BIGNUM *I, RSA *rsa)
if (!BN_mul(&r1,r0,rsa->q,ctx)) goto err;
if (!BN_add(r0,&r1,&m1)) goto err;
+ if (rsa->e && rsa->n)
+ {
+ if (!rsa->meth->bn_mod_exp(&vrfy,r0,rsa->e,rsa->n,ctx,NULL)) goto err;
+ if (BN_cmp(I, &vrfy) != 0)
+ {
+ if (!rsa->meth->bn_mod_exp(r0,I,rsa->d,rsa->n,ctx,NULL)) goto err;
+ }
+ }
ret=1;
err:
BN_clear_free(&m1);
BN_clear_free(&r1);
+ BN_clear_free(&vrfy);
BN_CTX_free(ctx);
return(ret);
}
OpenPOWER on IntegriCloud