6bc658d2e3
This change extracts two, common parts of RSA_decrypt and RSA_sign into a function called |private_transform|. It also allows this to be overridden in a method, which is convenient for opaque keys that only expose the raw RSA transform as it means that the padding code from BoringSSL can be easily reimplemented. One significant change here is that short RSA ciphertexts will no longer be accepted. I think this is correct and OpenSSL has a comment about PGP mistakenly stripping leading zeros. However, these is the possibility that it could break something. Change-Id: I258c5cbbf21314cc9b6e8d2a2b898fd9a440cd40 Reviewed-on: https://boringssl-review.googlesource.com/1554 Reviewed-by: Adam Langley <agl@google.com>
151 lines
6.9 KiB
C
151 lines
6.9 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#ifndef OPENSSL_HEADER_RSA_INTERNAL_H
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#define OPENSSL_HEADER_RSA_INTERNAL_H
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#include <openssl/base.h>
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#include <openssl/asn1.h>
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#include <openssl/thread.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#define RSA_PKCS1_PADDING_SIZE 11
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/* BN_BLINDING flags */
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#define BN_BLINDING_NO_UPDATE 0x00000001
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#define BN_BLINDING_NO_RECREATE 0x00000002
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BN_BLINDING *BN_BLINDING_new(const BIGNUM *A, const BIGNUM *Ai, BIGNUM *mod);
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void BN_BLINDING_free(BN_BLINDING *b);
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int BN_BLINDING_update(BN_BLINDING *b, BN_CTX *ctx);
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int BN_BLINDING_convert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
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int BN_BLINDING_invert(BIGNUM *n, BN_BLINDING *b, BN_CTX *ctx);
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int BN_BLINDING_convert_ex(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *);
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int BN_BLINDING_invert_ex(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *);
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CRYPTO_THREADID *BN_BLINDING_thread_id(BN_BLINDING *);
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unsigned long BN_BLINDING_get_flags(const BN_BLINDING *);
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void BN_BLINDING_set_flags(BN_BLINDING *, unsigned long);
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BN_BLINDING *BN_BLINDING_create_param(
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BN_BLINDING *b, const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
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int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
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const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx),
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BN_MONT_CTX *m_ctx);
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BN_BLINDING *rsa_setup_blinding(RSA *rsa, BN_CTX *in_ctx);
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int RSA_padding_add_PKCS1_type_1(uint8_t *to, unsigned to_len,
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const uint8_t *from, unsigned from_len);
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int RSA_padding_check_PKCS1_type_1(uint8_t *to, unsigned to_len,
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const uint8_t *from, unsigned from_len);
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int RSA_padding_add_PKCS1_type_2(uint8_t *to, unsigned to_len,
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const uint8_t *from, unsigned from_len);
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int RSA_padding_check_PKCS1_type_2(uint8_t *to, unsigned to_len,
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const uint8_t *from, unsigned from_len);
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int RSA_padding_add_PKCS1_OAEP_mgf1(uint8_t *to, unsigned to_len,
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const uint8_t *from, unsigned from_len,
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const uint8_t *param, unsigned plen,
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const EVP_MD *md, const EVP_MD *mgf1md);
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int RSA_padding_check_PKCS1_OAEP_mgf1(uint8_t *to, unsigned to_len,
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const uint8_t *from, unsigned from_len,
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const uint8_t *param, unsigned plen,
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const EVP_MD *md, const EVP_MD *mgf1md);
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int RSA_padding_add_none(uint8_t *to, unsigned to_len, const uint8_t *from,
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unsigned from_len);
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int RSA_padding_check_none(uint8_t *to, unsigned to_len, const uint8_t *from,
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unsigned from_len);
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/* RSA_verify_PKCS1_PSS_mgf1 */
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int RSA_verify_PKCS1_PSS_mgf1(RSA *rsa, const uint8_t *mHash,
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const EVP_MD *Hash, const EVP_MD *mgf1Hash,
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const uint8_t *EM, int sLen);
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int RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, uint8_t *EM, const uint8_t *mHash,
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const EVP_MD *Hash, const EVP_MD *mgf1Hash,
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int sLen);
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/* RSA_private_transform calls either the method-specific |private_transform|
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* function (if given) or the generic one. See the comment for
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* |private_transform| in |rsa_meth_st|. */
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int RSA_private_transform(RSA *rsa, uint8_t *out, const uint8_t *in,
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size_t len);
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typedef struct rsa_pss_params_st {
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X509_ALGOR *hashAlgorithm;
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X509_ALGOR *maskGenAlgorithm;
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ASN1_INTEGER *saltLength;
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ASN1_INTEGER *trailerField;
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} RSA_PSS_PARAMS;
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DECLARE_ASN1_FUNCTIONS(RSA_PSS_PARAMS)
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typedef struct rsa_oaep_params_st {
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X509_ALGOR *hashFunc;
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X509_ALGOR *maskGenFunc;
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X509_ALGOR *pSourceFunc;
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} RSA_OAEP_PARAMS;
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#if defined(__cplusplus)
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} /* extern C */
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#endif
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#endif /* OPENSSL_HEADER_RSA_INTERNAL_H */
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