From 385790bbe258a0de5b6842a60a07a834e590fe1a Mon Sep 17 00:00:00 2001
From: tb <>
Date: Fri, 14 Jan 2022 08:34:39 +0000
Subject: Make RSA, RSA_PSS_PARAMS and RSA_METHOD opaque

Move the struct internals to rsa_locl.h and provide a missing
typedef in ossl_typ.h.

ok inoguchi jsing
---
 src/lib/libcrypto/rsa/rsa_locl.h | 76 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 75 insertions(+), 1 deletion(-)

(limited to 'src/lib/libcrypto/rsa/rsa_locl.h')

diff --git a/src/lib/libcrypto/rsa/rsa_locl.h b/src/lib/libcrypto/rsa/rsa_locl.h
index 7036449c36..9eae2b3a24 100644
--- a/src/lib/libcrypto/rsa/rsa_locl.h
+++ b/src/lib/libcrypto/rsa/rsa_locl.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_locl.h,v 1.11 2019/11/02 13:47:41 jsing Exp $ */
+/* $OpenBSD: rsa_locl.h,v 1.12 2022/01/14 08:34:39 tb Exp $ */
 
 __BEGIN_HIDDEN_DECLS
 
@@ -8,6 +8,80 @@ __BEGIN_HIDDEN_DECLS
 #define pkey_is_pss(pkey) (pkey->ameth->pkey_id == EVP_PKEY_RSA_PSS)
 #define pkey_ctx_is_pss(ctx) (ctx->pmeth->pkey_id == EVP_PKEY_RSA_PSS)
 
+struct rsa_meth_st {
+	const char *name;
+	int (*rsa_pub_enc)(int flen, const unsigned char *from,
+	    unsigned char *to, RSA *rsa, int padding);
+	int (*rsa_pub_dec)(int flen, const unsigned char *from,
+	    unsigned char *to, RSA *rsa, int padding);
+	int (*rsa_priv_enc)(int flen, const unsigned char *from,
+	    unsigned char *to, RSA *rsa, int padding);
+	int (*rsa_priv_dec)(int flen, const unsigned char *from,
+	    unsigned char *to, RSA *rsa, int padding);
+	int (*rsa_mod_exp)(BIGNUM *r0, const BIGNUM *I, RSA *rsa,
+	    BN_CTX *ctx); /* Can be null */
+	int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
+	    const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx); /* Can be null */
+	int (*init)(RSA *rsa);		/* called at new */
+	int (*finish)(RSA *rsa);	/* called at free */
+	int flags;			/* RSA_METHOD_FLAG_* things */
+	char *app_data;			/* may be needed! */
+/* New sign and verify functions: some libraries don't allow arbitrary data
+ * to be signed/verified: this allows them to be used. Note: for this to work
+ * the RSA_public_decrypt() and RSA_private_encrypt() should *NOT* be used
+ * RSA_sign(), RSA_verify() should be used instead. Note: for backwards
+ * compatibility this functionality is only enabled if the RSA_FLAG_SIGN_VER
+ * option is set in 'flags'.
+ */
+	int (*rsa_sign)(int type, const unsigned char *m, unsigned int m_length,
+	    unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
+	int (*rsa_verify)(int dtype, const unsigned char *m,
+	    unsigned int m_length, const unsigned char *sigbuf,
+	    unsigned int siglen, const RSA *rsa);
+/* If this callback is NULL, the builtin software RSA key-gen will be used. This
+ * is for behavioural compatibility whilst the code gets rewired, but one day
+ * it would be nice to assume there are no such things as "builtin software"
+ * implementations. */
+	int (*rsa_keygen)(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
+};
+
+struct rsa_st {
+	/* The first parameter is used to pickup errors where
+	 * this is passed instead of aEVP_PKEY, it is set to 0 */
+	int pad;
+	long version;
+	const RSA_METHOD *meth;
+
+	/* functional reference if 'meth' is ENGINE-provided */
+	ENGINE *engine;
+	BIGNUM *n;
+	BIGNUM *e;
+	BIGNUM *d;
+	BIGNUM *p;
+	BIGNUM *q;
+	BIGNUM *dmp1;
+	BIGNUM *dmq1;
+	BIGNUM *iqmp;
+
+	/* Parameter restrictions for PSS only keys. */
+	RSA_PSS_PARAMS *pss;
+
+	/* be careful using this if the RSA structure is shared */
+	CRYPTO_EX_DATA ex_data;
+	int references;
+	int flags;
+
+	/* Used to cache montgomery values */
+	BN_MONT_CTX *_method_mod_n;
+	BN_MONT_CTX *_method_mod_p;
+	BN_MONT_CTX *_method_mod_q;
+
+	/* all BIGNUM values are actually in the following data, if it is not
+	 * NULL */
+	BN_BLINDING *blinding;
+	BN_BLINDING *mt_blinding;
+};
+
 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd, const EVP_MD *mgf1md,
     int saltlen);
 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
-- 
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