|
- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
- #ifndef OPENSSL_HEADER_RSA_H
- #define OPENSSL_HEADER_RSA_H
-
- #include <openssl/base.h>
-
- #include <openssl/engine.h>
- #include <openssl/ex_data.h>
- #include <openssl/thread.h>
-
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
-
- /* rsa.h contains functions for handling encryption and signature using RSA. */
-
-
- /* Allocation and destruction. */
-
- /* RSA_new returns a new, empty RSA object or NULL on error. */
- OPENSSL_EXPORT RSA *RSA_new(void);
-
- /* RSA_new_method acts the same as |RSA_new| but takes an explicit |ENGINE|. */
- OPENSSL_EXPORT RSA *RSA_new_method(const ENGINE *engine);
-
- /* RSA_free decrements the reference count of |rsa| and frees it if the
- * reference count drops to zero. */
- OPENSSL_EXPORT void RSA_free(RSA *rsa);
-
- /* RSA_up_ref increments the reference count of |rsa|. */
- OPENSSL_EXPORT int RSA_up_ref(RSA *rsa);
-
-
- /* Key generation. */
-
- /* RSA_generate_key_ex generates a new RSA key where the modulus has size
- * |bits| and the public exponent is |e|. If unsure, |RSA_F4| is a good value
- * for |e|. If |cb| is not NULL then it is called during the key generation
- * process. In addition to the calls documented for |BN_generate_prime_ex|, it
- * is called with event=2 when the n'th prime is rejected as unsuitable and
- * with event=3 when a suitable value for |p| is found.
- *
- * It returns one on success or zero on error. */
- OPENSSL_EXPORT int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e,
- BN_GENCB *cb);
-
- /* RSA_generate_multi_prime_key acts like |RSA_generate_key_ex| but can
- * generate an RSA private key with more than two primes. */
- OPENSSL_EXPORT int RSA_generate_multi_prime_key(RSA *rsa, int bits,
- int num_primes, BIGNUM *e,
- BN_GENCB *cb);
-
-
- /* Encryption / Decryption */
-
- /* Padding types for encryption. */
- #define RSA_PKCS1_PADDING 1
- #define RSA_NO_PADDING 3
- #define RSA_PKCS1_OAEP_PADDING 4
- /* RSA_PKCS1_PSS_PADDING can only be used via the EVP interface. */
- #define RSA_PKCS1_PSS_PADDING 6
-
- /* RSA_encrypt encrypts |in_len| bytes from |in| to the public key from |rsa|
- * and writes, at most, |max_out| bytes of encrypted data to |out|. The
- * |max_out| argument must be, at least, |RSA_size| in order to ensure success.
- *
- * It returns 1 on success or zero on error.
- *
- * The |padding| argument must be one of the |RSA_*_PADDING| values. If in
- * doubt, |RSA_PKCS1_PADDING| is the most common but |RSA_PKCS1_OAEP_PADDING|
- * is the most secure. */
- OPENSSL_EXPORT int RSA_encrypt(RSA *rsa, size_t *out_len, uint8_t *out,
- size_t max_out, const uint8_t *in, size_t in_len,
- int padding);
-
- /* RSA_decrypt decrypts |in_len| bytes from |in| with the private key from
- * |rsa| and writes, at most, |max_out| bytes of plaintext to |out|. The
- * |max_out| argument must be, at least, |RSA_size| in order to ensure success.
- *
- * It returns 1 on success or zero on error.
- *
- * The |padding| argument must be one of the |RSA_*_PADDING| values. If in
- * doubt, |RSA_PKCS1_PADDING| is the most common but |RSA_PKCS1_OAEP_PADDING|
- * is the most secure. */
- OPENSSL_EXPORT int RSA_decrypt(RSA *rsa, size_t *out_len, uint8_t *out,
- size_t max_out, const uint8_t *in, size_t in_len,
- int padding);
-
- /* RSA_public_encrypt encrypts |flen| bytes from |from| to the public key in
- * |rsa| and writes the encrypted data to |to|. The |to| buffer must have at
- * least |RSA_size| bytes of space. It returns the number of bytes written, or
- * -1 on error. The |padding| argument must be one of the |RSA_*_PADDING|
- * values. If in doubt, |RSA_PKCS1_PADDING| is the most common but
- * |RSA_PKCS1_OAEP_PADDING| is the most secure.
- *
- * WARNING: this function is dangerous because it breaks the usual return value
- * convention. Use |RSA_encrypt| instead. */
- OPENSSL_EXPORT int RSA_public_encrypt(int flen, const uint8_t *from,
- uint8_t *to, RSA *rsa, int padding);
-
- /* RSA_private_decrypt decrypts |flen| bytes from |from| with the public key in
- * |rsa| and writes the plaintext to |to|. The |to| buffer must have at
- * least |RSA_size| bytes of space. It returns the number of bytes written, or
- * -1 on error. The |padding| argument must be one of the |RSA_*_PADDING|
- * values. If in doubt, |RSA_PKCS1_PADDING| is the most common but
- * |RSA_PKCS1_OAEP_PADDING| is the most secure.
- *
- * WARNING: this function is dangerous because it breaks the usual return value
- * convention. Use |RSA_decrypt| instead. */
- OPENSSL_EXPORT int RSA_private_decrypt(int flen, const uint8_t *from,
- uint8_t *to, RSA *rsa, int padding);
-
- /* RSA_message_index_PKCS1_type_2 performs the first step of a PKCS #1 padding
- * check for decryption. If the |from_len| bytes pointed to at |from| are a
- * valid PKCS #1 message, it returns one and sets |*out_index| to the start of
- * the unpadded message. The unpadded message is a suffix of the input and has
- * length |from_len - *out_index|. Otherwise, it returns zero and sets
- * |*out_index| to zero. This function runs in time independent of the input
- * data and is intended to be used directly to avoid Bleichenbacher's attack.
- *
- * WARNING: This function behaves differently from the usual OpenSSL convention
- * in that it does NOT put an error on the queue in the error case. */
- OPENSSL_EXPORT int RSA_message_index_PKCS1_type_2(const uint8_t *from,
- size_t from_len,
- size_t *out_index);
-
-
- /* Signing / Verification */
-
- /* RSA_sign signs |in_len| bytes of digest from |in| with |rsa| and writes, at
- * most, |RSA_size(rsa)| bytes to |out|. On successful return, the actual
- * number of bytes written is written to |*out_len|.
- *
- * The |hash_nid| argument identifies the hash function used to calculate |in|
- * and is embedded in the resulting signature. For example, it might be
- * |NID_sha256|.
- *
- * It returns 1 on success and zero on error. */
- OPENSSL_EXPORT int RSA_sign(int hash_nid, const uint8_t *in,
- unsigned int in_len, uint8_t *out,
- unsigned int *out_len, RSA *rsa);
-
- /* RSA_sign_raw signs |in_len| bytes from |in| with the public key from |rsa|
- * and writes, at most, |max_out| bytes of signature data to |out|. The
- * |max_out| argument must be, at least, |RSA_size| in order to ensure success.
- *
- * It returns 1 on success or zero on error.
- *
- * The |padding| argument must be one of the |RSA_*_PADDING| values. If in
- * doubt, |RSA_PKCS1_PADDING| is the most common. */
- OPENSSL_EXPORT int RSA_sign_raw(RSA *rsa, size_t *out_len, uint8_t *out,
- size_t max_out, const uint8_t *in,
- size_t in_len, int padding);
-
- /* RSA_verify verifies that |sig_len| bytes from |sig| are a valid, PKCS#1
- * signature of |msg_len| bytes at |msg| by |rsa|.
- *
- * The |hash_nid| argument identifies the hash function used to calculate |in|
- * and is embedded in the resulting signature in order to prevent hash
- * confusion attacks. For example, it might be |NID_sha256|.
- *
- * It returns one if the signature is valid and zero otherwise.
- *
- * WARNING: this differs from the original, OpenSSL function which additionally
- * returned -1 on error. */
- OPENSSL_EXPORT int RSA_verify(int hash_nid, const uint8_t *msg, size_t msg_len,
- const uint8_t *sig, size_t sig_len, RSA *rsa);
-
- /* RSA_verify_raw verifies |in_len| bytes of signature from |in| using the
- * public key from |rsa| and writes, at most, |max_out| bytes of plaintext to
- * |out|. The |max_out| argument must be, at least, |RSA_size| in order to
- * ensure success.
- *
- * It returns 1 on success or zero on error.
- *
- * The |padding| argument must be one of the |RSA_*_PADDING| values. If in
- * doubt, |RSA_PKCS1_PADDING| is the most common. */
- OPENSSL_EXPORT int RSA_verify_raw(RSA *rsa, size_t *out_len, uint8_t *out,
- size_t max_out, const uint8_t *in,
- size_t in_len, int padding);
-
- /* RSA_private_encrypt encrypts |flen| bytes from |from| with the private key in
- * |rsa| and writes the encrypted data to |to|. The |to| buffer must have at
- * least |RSA_size| bytes of space. It returns the number of bytes written, or
- * -1 on error. The |padding| argument must be one of the |RSA_*_PADDING|
- * values. If in doubt, |RSA_PKCS1_PADDING| is the most common.
- *
- * WARNING: this function is dangerous because it breaks the usual return value
- * convention. Use |RSA_sign_raw| instead. */
- OPENSSL_EXPORT int RSA_private_encrypt(int flen, const uint8_t *from,
- uint8_t *to, RSA *rsa, int padding);
-
- /* RSA_public_decrypt verifies |flen| bytes of signature from |from| using the
- * public key in |rsa| and writes the plaintext to |to|. The |to| buffer must
- * have at least |RSA_size| bytes of space. It returns the number of bytes
- * written, or -1 on error. The |padding| argument must be one of the
- * |RSA_*_PADDING| values. If in doubt, |RSA_PKCS1_PADDING| is the most common.
- *
- * WARNING: this function is dangerous because it breaks the usual return value
- * convention. Use |RSA_verify_raw| instead. */
- OPENSSL_EXPORT int RSA_public_decrypt(int flen, const uint8_t *from,
- uint8_t *to, RSA *rsa, int padding);
-
-
- /* Utility functions. */
-
- /* RSA_size returns the number of bytes in the modulus, which is also the size
- * of a signature or encrypted value using |rsa|. */
- OPENSSL_EXPORT unsigned RSA_size(const RSA *rsa);
-
- /* RSA_is_opaque returns one if |rsa| is opaque and doesn't expose its key
- * material. Otherwise it returns zero. */
- OPENSSL_EXPORT int RSA_is_opaque(const RSA *rsa);
-
- /* RSA_supports_digest returns one if |rsa| supports signing digests
- * of type |md|. Otherwise it returns zero. */
- OPENSSL_EXPORT int RSA_supports_digest(const RSA *rsa, const EVP_MD *md);
-
- /* RSAPublicKey_dup allocates a fresh |RSA| and copies the public key from
- * |rsa| into it. It returns the fresh |RSA| object, or NULL on error. */
- OPENSSL_EXPORT RSA *RSAPublicKey_dup(const RSA *rsa);
-
- /* RSAPrivateKey_dup allocates a fresh |RSA| and copies the private key from
- * |rsa| into it. It returns the fresh |RSA| object, or NULL on error. */
- OPENSSL_EXPORT RSA *RSAPrivateKey_dup(const RSA *rsa);
-
- /* RSA_check_key performs basic validatity tests on |rsa|. It returns one if
- * they pass and zero otherwise. Opaque keys and public keys always pass. If it
- * returns zero then a more detailed error is available on the error queue. */
- OPENSSL_EXPORT int RSA_check_key(const RSA *rsa);
-
- /* RSA_recover_crt_params uses |rsa->n|, |rsa->d| and |rsa->e| in order to
- * calculate the two primes used and thus the precomputed, CRT values. These
- * values are set in the |p|, |q|, |dmp1|, |dmq1| and |iqmp| members of |rsa|,
- * which must be |NULL| on entry. It returns one on success and zero
- * otherwise. */
- OPENSSL_EXPORT int RSA_recover_crt_params(RSA *rsa);
-
- /* RSA_verify_PKCS1_PSS_mgf1 verifies that |EM| is a correct PSS padding of
- * |mHash|, where |mHash| is a digest produced by |Hash|. |EM| must point to
- * exactly |RSA_size(rsa)| bytes of data. The |mgf1Hash| argument specifies the
- * hash function for generating the mask. If NULL, |Hash| is used. The |sLen|
- * argument specifies the expected salt length in bytes. If |sLen| is -1 then
- * the salt length is the same as the hash length. If -2, then the salt length
- * is maximal and is taken from the size of |EM|.
- *
- * It returns one on success or zero on error. */
- OPENSSL_EXPORT int RSA_verify_PKCS1_PSS_mgf1(RSA *rsa, const uint8_t *mHash,
- const EVP_MD *Hash,
- const EVP_MD *mgf1Hash,
- const uint8_t *EM, int sLen);
-
- /* RSA_padding_add_PKCS1_PSS_mgf1 writes a PSS padding of |mHash| to |EM|,
- * where |mHash| is a digest produced by |Hash|. |RSA_size(rsa)| bytes of
- * output will be written to |EM|. The |mgf1Hash| argument specifies the hash
- * function for generating the mask. If NULL, |Hash| is used. The |sLen|
- * argument specifies the expected salt length in bytes. If |sLen| is -1 then
- * the salt length is the same as the hash length. If -2, then the salt length
- * is maximal given the space in |EM|.
- *
- * It returns one on success or zero on error. */
- OPENSSL_EXPORT int RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, uint8_t *EM,
- const uint8_t *mHash,
- const EVP_MD *Hash,
- const EVP_MD *mgf1Hash,
- int sLen);
-
- /* RSA_add_pkcs1_prefix builds a version of |msg| prefixed with the DigestInfo
- * header for the given hash function and sets |out_msg| to point to it. On
- * successful return, |*out_msg| may be allocated memory and, if so,
- * |*is_alloced| will be 1. */
- OPENSSL_EXPORT int RSA_add_pkcs1_prefix(uint8_t **out_msg, size_t *out_msg_len,
- int *is_alloced, int hash_nid,
- const uint8_t *msg, size_t msg_len);
-
-
- /* ASN.1 functions. */
-
- /* RSA_parse_public_key parses a DER-encoded RSAPublicKey structure (RFC 3447)
- * from |cbs| and advances |cbs|. It returns a newly-allocated |RSA| or NULL on
- * error. */
- OPENSSL_EXPORT RSA *RSA_parse_public_key(CBS *cbs);
-
- /* RSA_public_key_from_bytes parses |in| as a DER-encoded RSAPublicKey structure
- * (RFC 3447). It returns a newly-allocated |RSA| or NULL on error. */
- OPENSSL_EXPORT RSA *RSA_public_key_from_bytes(const uint8_t *in, size_t in_len);
-
- /* RSA_marshal_public_key marshals |rsa| as a DER-encoded RSAPublicKey structure
- * (RFC 3447) and appends the result to |cbb|. It returns one on success and
- * zero on failure. */
- OPENSSL_EXPORT int RSA_marshal_public_key(CBB *cbb, const RSA *rsa);
-
- /* RSA_public_key_to_bytes marshals |rsa| as a DER-encoded RSAPublicKey
- * structure (RFC 3447) and, on success, sets |*out_bytes| to a newly allocated
- * buffer containing the result and returns one. Otherwise, it returns zero. The
- * result should be freed with |OPENSSL_free|. */
- OPENSSL_EXPORT int RSA_public_key_to_bytes(uint8_t **out_bytes, size_t *out_len,
- const RSA *rsa);
-
- /* RSA_parse_private_key parses a DER-encoded RSAPrivateKey structure (RFC 3447)
- * from |cbs| and advances |cbs|. It returns a newly-allocated |RSA| or NULL on
- * error. */
- OPENSSL_EXPORT RSA *RSA_parse_private_key(CBS *cbs);
-
- /* RSA_private_key_from_bytes parses |in| as a DER-encoded RSAPrivateKey
- * structure (RFC 3447). It returns a newly-allocated |RSA| or NULL on error. */
- OPENSSL_EXPORT RSA *RSA_private_key_from_bytes(const uint8_t *in,
- size_t in_len);
-
- /* RSA_marshal_private_key marshals |rsa| as a DER-encoded RSAPrivateKey
- * structure (RFC 3447) and appends the result to |cbb|. It returns one on
- * success and zero on failure. */
- OPENSSL_EXPORT int RSA_marshal_private_key(CBB *cbb, const RSA *rsa);
-
- /* RSA_private_key_to_bytes marshals |rsa| as a DER-encoded RSAPrivateKey
- * structure (RFC 3447) and, on success, sets |*out_bytes| to a newly allocated
- * buffer containing the result and returns one. Otherwise, it returns zero. The
- * result should be freed with |OPENSSL_free|. */
- OPENSSL_EXPORT int RSA_private_key_to_bytes(uint8_t **out_bytes,
- size_t *out_len, const RSA *rsa);
-
-
- /* Deprecated functions. */
-
- /* d2i_RSAPublicKey parses an ASN.1, DER-encoded, RSA public key from |len|
- * bytes at |*inp|. If |out| is not NULL then, on exit, a pointer to the result
- * is in |*out|. If |*out| is already non-NULL on entry then the result is
- * written directly into |*out|, otherwise a fresh |RSA| is allocated. On
- * successful exit, |*inp| is advanced past the DER structure. It returns the
- * result or NULL on error. */
- OPENSSL_EXPORT RSA *d2i_RSAPublicKey(RSA **out, const uint8_t **inp, long len);
-
- /* i2d_RSAPublicKey marshals |in| to an ASN.1, DER structure. If |outp| is not
- * NULL then the result is written to |*outp| and |*outp| is advanced just past
- * the output. It returns the number of bytes in the result, whether written or
- * not, or a negative value on error. */
- OPENSSL_EXPORT int i2d_RSAPublicKey(const RSA *in, uint8_t **outp);
-
- /* d2i_RSAPrivateKey parses an ASN.1, DER-encoded, RSA private key from |len|
- * bytes at |*inp|. If |out| is not NULL then, on exit, a pointer to the result
- * is in |*out|. If |*out| is already non-NULL on entry then the result is
- * written directly into |*out|, otherwise a fresh |RSA| is allocated. On
- * successful exit, |*inp| is advanced past the DER structure. It returns the
- * result or NULL on error. */
- OPENSSL_EXPORT RSA *d2i_RSAPrivateKey(RSA **out, const uint8_t **inp, long len);
-
- /* i2d_RSAPrivateKey marshals |in| to an ASN.1, DER structure. If |outp| is not
- * NULL then the result is written to |*outp| and |*outp| is advanced just past
- * the output. It returns the number of bytes in the result, whether written or
- * not, or a negative value on error. */
- OPENSSL_EXPORT int i2d_RSAPrivateKey(const RSA *in, uint8_t **outp);
-
-
- /* ex_data functions.
- *
- * See |ex_data.h| for details. */
-
- OPENSSL_EXPORT int RSA_get_ex_new_index(long argl, void *argp,
- CRYPTO_EX_new *new_func,
- CRYPTO_EX_dup *dup_func,
- CRYPTO_EX_free *free_func);
- OPENSSL_EXPORT int RSA_set_ex_data(RSA *r, int idx, void *arg);
- OPENSSL_EXPORT void *RSA_get_ex_data(const RSA *r, int idx);
-
- /* RSA_FLAG_OPAQUE specifies that this RSA_METHOD does not expose its key
- * material. This may be set if, for instance, it is wrapping some other crypto
- * API, like a platform key store. */
- #define RSA_FLAG_OPAQUE 1
-
- /* RSA_FLAG_CACHE_PUBLIC causes a precomputed Montgomery context to be created,
- * on demand, for the public key operations. */
- #define RSA_FLAG_CACHE_PUBLIC 2
-
- /* RSA_FLAG_CACHE_PRIVATE causes a precomputed Montgomery context to be
- * created, on demand, for the private key operations. */
- #define RSA_FLAG_CACHE_PRIVATE 4
-
- /* RSA_FLAG_NO_BLINDING disables blinding of private operations. */
- #define RSA_FLAG_NO_BLINDING 8
-
- /* RSA_FLAG_EXT_PKEY means that private key operations will be handled by
- * |mod_exp| and that they do not depend on the private key components being
- * present: for example a key stored in external hardware. */
- #define RSA_FLAG_EXT_PKEY 0x20
-
- /* RSA_FLAG_SIGN_VER causes the |sign| and |verify| functions of |rsa_meth_st|
- * to be called when set. */
- #define RSA_FLAG_SIGN_VER 0x40
-
-
- /* RSA public exponent values. */
-
- #define RSA_3 0x3
- #define RSA_F4 0x10001
-
-
- /* Deprecated functions. */
-
- /* RSA_blinding_on returns one. */
- OPENSSL_EXPORT int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
-
- /* RSA_generate_key behaves like |RSA_generate_key_ex|, which is what you
- * should use instead. It returns NULL on error, or a newly-allocated |RSA| on
- * success. This function is provided for compatibility only. The |callback|
- * and |cb_arg| parameters must be NULL. */
- OPENSSL_EXPORT RSA *RSA_generate_key(int bits, unsigned long e, void *callback,
- void *cb_arg);
-
-
- struct rsa_meth_st {
- struct openssl_method_common_st common;
-
- void *app_data;
-
- int (*init)(RSA *rsa);
- int (*finish)(RSA *rsa);
-
- /* size returns the size of the RSA modulus in bytes. */
- size_t (*size)(const RSA *rsa);
-
- int (*sign)(int type, const uint8_t *m, unsigned int m_length,
- uint8_t *sigret, unsigned int *siglen, const RSA *rsa);
-
- int (*verify)(int dtype, const uint8_t *m, unsigned int m_length,
- const uint8_t *sigbuf, unsigned int siglen, const RSA *rsa);
-
-
- /* These functions mirror the |RSA_*| functions of the same name. */
- int (*encrypt)(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
- const uint8_t *in, size_t in_len, int padding);
- int (*sign_raw)(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
- const uint8_t *in, size_t in_len, int padding);
-
- int (*decrypt)(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
- const uint8_t *in, size_t in_len, int padding);
- int (*verify_raw)(RSA *rsa, size_t *out_len, uint8_t *out, size_t max_out,
- const uint8_t *in, size_t in_len, int padding);
-
- /* private_transform takes a big-endian integer from |in|, calculates the
- * d'th power of it, modulo the RSA modulus and writes the result as a
- * big-endian integer to |out|. Both |in| and |out| are |len| bytes long and
- * |len| is always equal to |RSA_size(rsa)|. If the result of the transform
- * can be represented in fewer than |len| bytes, then |out| must be zero
- * padded on the left.
- *
- * It returns one on success and zero otherwise.
- *
- * RSA decrypt and sign operations will call this, thus an ENGINE might wish
- * to override it in order to avoid having to implement the padding
- * functionality demanded by those, higher level, operations. */
- int (*private_transform)(RSA *rsa, uint8_t *out, const uint8_t *in,
- size_t len);
-
- int (*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);
-
- int flags;
-
- int (*keygen)(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
-
- int (*multi_prime_keygen)(RSA *rsa, int bits, int num_primes, BIGNUM *e,
- BN_GENCB *cb);
-
- /* supports_digest returns one if |rsa| supports digests of type
- * |md|. If null, it is assumed that all digests are supported. */
- int (*supports_digest)(const RSA *rsa, const EVP_MD *md);
- };
-
-
- /* Private functions. */
-
- typedef struct bn_blinding_st BN_BLINDING;
-
- struct rsa_st {
- RSA_METHOD *meth;
-
- BIGNUM *n;
- BIGNUM *e;
- BIGNUM *d;
- BIGNUM *p;
- BIGNUM *q;
- BIGNUM *dmp1;
- BIGNUM *dmq1;
- BIGNUM *iqmp;
-
- STACK_OF(RSA_additional_prime) *additional_primes;
-
- /* be careful using this if the RSA structure is shared */
- CRYPTO_EX_DATA ex_data;
- CRYPTO_refcount_t references;
- int flags;
-
- CRYPTO_MUTEX lock;
-
- /* Used to cache montgomery values. The creation of these values is protected
- * by |lock|. */
- BN_MONT_CTX *_method_mod_n;
- BN_MONT_CTX *_method_mod_p;
- BN_MONT_CTX *_method_mod_q;
-
- /* num_blindings contains the size of the |blindings| and |blindings_inuse|
- * arrays. This member and the |blindings_inuse| array are protected by
- * |lock|. */
- unsigned num_blindings;
- /* blindings is an array of BN_BLINDING structures that can be reserved by a
- * thread by locking |lock| and changing the corresponding element in
- * |blindings_inuse| from 0 to 1. */
- BN_BLINDING **blindings;
- unsigned char *blindings_inuse;
- };
-
-
- #if defined(__cplusplus)
- } /* extern C */
- #endif
-
- #define RSA_R_BAD_E_VALUE 100
- #define RSA_R_BAD_FIXED_HEADER_DECRYPT 101
- #define RSA_R_BAD_PAD_BYTE_COUNT 102
- #define RSA_R_BAD_RSA_PARAMETERS 103
- #define RSA_R_BAD_SIGNATURE 104
- #define RSA_R_BLOCK_TYPE_IS_NOT_01 105
- #define RSA_R_BN_NOT_INITIALIZED 106
- #define RSA_R_CRT_PARAMS_ALREADY_GIVEN 107
- #define RSA_R_CRT_VALUES_INCORRECT 108
- #define RSA_R_DATA_LEN_NOT_EQUAL_TO_MOD_LEN 109
- #define RSA_R_DATA_TOO_LARGE 110
- #define RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE 111
- #define RSA_R_DATA_TOO_LARGE_FOR_MODULUS 112
- #define RSA_R_DATA_TOO_SMALL 113
- #define RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE 114
- #define RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY 115
- #define RSA_R_D_E_NOT_CONGRUENT_TO_1 116
- #define RSA_R_EMPTY_PUBLIC_KEY 117
- #define RSA_R_FIRST_OCTET_INVALID 118
- #define RSA_R_INCONSISTENT_SET_OF_CRT_VALUES 119
- #define RSA_R_INTERNAL_ERROR 120
- #define RSA_R_INVALID_MESSAGE_LENGTH 121
- #define RSA_R_KEY_SIZE_TOO_SMALL 122
- #define RSA_R_LAST_OCTET_INVALID 123
- #define RSA_R_MODULUS_TOO_LARGE 124
- #define RSA_R_NO_PUBLIC_EXPONENT 125
- #define RSA_R_NULL_BEFORE_BLOCK_MISSING 126
- #define RSA_R_N_NOT_EQUAL_P_Q 127
- #define RSA_R_OAEP_DECODING_ERROR 128
- #define RSA_R_ONLY_ONE_OF_P_Q_GIVEN 129
- #define RSA_R_OUTPUT_BUFFER_TOO_SMALL 130
- #define RSA_R_PADDING_CHECK_FAILED 131
- #define RSA_R_PKCS_DECODING_ERROR 132
- #define RSA_R_SLEN_CHECK_FAILED 133
- #define RSA_R_SLEN_RECOVERY_FAILED 134
- #define RSA_R_TOO_LONG 135
- #define RSA_R_TOO_MANY_ITERATIONS 136
- #define RSA_R_UNKNOWN_ALGORITHM_TYPE 137
- #define RSA_R_UNKNOWN_PADDING_TYPE 138
- #define RSA_R_VALUE_MISSING 139
- #define RSA_R_WRONG_SIGNATURE_LENGTH 140
- #define RSA_R_MUST_HAVE_AT_LEAST_TWO_PRIMES 141
- #define RSA_R_CANNOT_RECOVER_MULTI_PRIME_KEY 142
- #define RSA_R_BAD_ENCODING 143
- #define RSA_R_ENCODE_ERROR 144
- #define RSA_R_BAD_VERSION 145
-
- #endif /* OPENSSL_HEADER_RSA_H */
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