Obtain lock CRYPTO_LOCK_RSA before creating BN_MONT_CTX (bb617a96) · Commits · CYBER - Cyber Security / TS 103 523 MSP / TLMSP / TLMSP OpenSSL

CHANGES

+9 −0

Original line number	Diff line number	Diff line
		@@ -9,6 +9,15 @@
		when writing a 32767 byte record.
		[Bodo Moeller; problem reported by Eric Day <eday@concentric.net>]

		*) In RSA_eay_public_{en,ed}crypt and RSA_eay_mod_exp (rsa_eay.c),
		obtain lock CRYPTO_LOCK_RSA before creating BN_MONT_CTX
		structures and setting rsa->_method_mod_{n,p,q}.

		(RSA objects have a reference count access to which is protected
		by CRYPTO_LOCK_RSA [see rsa_lib.c, s3_srvr.c, ssl_cert.c, ssl_rsa.c],
		so they are meant to be shared between threads.)
		[patch submitted by "Reddie, Steven" <Steven.Reddie@ca.com>]

		*) rand_win.c fix for Borland C.
		[Ulf Möller]

crypto/rsa/rsa_eay.c

+70 −12

Original line number	Diff line number	Diff line
		@@ -138,10 +138,25 @@ static int RSA_eay_public_encrypt(int flen, unsigned char *from,

		if ((rsa->_method_mod_n == NULL) && (rsa->flags & RSA_FLAG_CACHE_PUBLIC))
		{
		if ((rsa->_method_mod_n=BN_MONT_CTX_new()) != NULL)
		if (!BN_MONT_CTX_set(rsa->_method_mod_n,rsa->n,ctx))
		CRYPTO_w_lock(CRYPTO_LOCK_RSA);
		if (rsa->_method_mod_n == NULL)
		{
		BN_MONT_CTX* bn_mont_ctx;
		if ((bn_mont_ctx=BN_MONT_CTX_new()) == NULL)
		{
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		if (!BN_MONT_CTX_set(bn_mont_ctx,rsa->n,ctx))
		{
		BN_MONT_CTX_free(bn_mont_ctx);
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		rsa->_method_mod_n = bn_mont_ctx;
		}
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		}

		if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->e,rsa->n,ctx,
		rsa->_method_mod_n)) goto err;
		@@ -369,10 +384,25 @@ static int RSA_eay_public_decrypt(int flen, unsigned char *from,
		/* do the decrypt */
		if ((rsa->_method_mod_n == NULL) && (rsa->flags & RSA_FLAG_CACHE_PUBLIC))
		{
		if ((rsa->_method_mod_n=BN_MONT_CTX_new()) != NULL)
		if (!BN_MONT_CTX_set(rsa->_method_mod_n,rsa->n,ctx))
		CRYPTO_w_lock(CRYPTO_LOCK_RSA);
		if (rsa->_method_mod_n == NULL)
		{
		BN_MONT_CTX* bn_mont_ctx;
		if ((bn_mont_ctx=BN_MONT_CTX_new()) == NULL)
		{
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		if (!BN_MONT_CTX_set(bn_mont_ctx,rsa->n,ctx))
		{
		BN_MONT_CTX_free(bn_mont_ctx);
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		rsa->_method_mod_n = bn_mont_ctx;
		}
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		}

		if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->e,rsa->n,ctx,
		rsa->_method_mod_n)) goto err;
		@@ -421,18 +451,46 @@ static int RSA_eay_mod_exp(BIGNUM r0, BIGNUM I, RSA *rsa)
		{
		if (rsa->_method_mod_p == NULL)
		{
		if ((rsa->_method_mod_p=BN_MONT_CTX_new()) != NULL)
		if (!BN_MONT_CTX_set(rsa->_method_mod_p,rsa->p,
		ctx))
		CRYPTO_w_lock(CRYPTO_LOCK_RSA);
		if (rsa->_method_mod_p == NULL)
		{
		BN_MONT_CTX* bn_mont_ctx;
		if ((bn_mont_ctx=BN_MONT_CTX_new()) == NULL)
		{
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		if (!BN_MONT_CTX_set(bn_mont_ctx,rsa->p,ctx))
		{
		BN_MONT_CTX_free(bn_mont_ctx);
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		rsa->_method_mod_p = bn_mont_ctx;
		}
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		}
		if (rsa->_method_mod_q == NULL)
		{
		if ((rsa->_method_mod_q=BN_MONT_CTX_new()) != NULL)
		if (!BN_MONT_CTX_set(rsa->_method_mod_q,rsa->q,
		ctx))
		CRYPTO_w_lock(CRYPTO_LOCK_RSA);
		if (rsa->_method_mod_q == NULL)
		{
		BN_MONT_CTX* bn_mont_ctx;
		if ((bn_mont_ctx=BN_MONT_CTX_new()) == NULL)
		{
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		if (!BN_MONT_CTX_set(bn_mont_ctx,rsa->q,ctx))
		{
		BN_MONT_CTX_free(bn_mont_ctx);
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		goto err;
		}
		rsa->_method_mod_q = bn_mont_ctx;
		}
		CRYPTO_w_unlock(CRYPTO_LOCK_RSA);
		}
		}

		if (!BN_mod(&r1,I,rsa->q,ctx)) goto err;

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