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RSA_meth_get_sign.3
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" RSA_meth_get0_app_data, RSA_meth_set0_app_data, RSA_meth_new, RSA_meth_free, RSA_meth_dup, RSA_meth_get0_name, RSA_meth_set1_name, RSA_meth_get_flags, RSA_meth_set_flags, RSA_meth_get_pub_enc, RSA_meth_set_pub_enc, RSA_meth_get_pub_dec, RSA_meth_set_pub_dec, RSA_meth_get_priv_enc, RSA_meth_set_priv_enc, RSA_meth_get_priv_dec, RSA_meth_set_priv_dec, RSA_meth_get_mod_exp, RSA_meth_set_mod_exp, RSA_meth_get_bn_mod_exp, RSA_meth_set_bn_mod_exp, RSA_meth_get_init, RSA_meth_set_init, RSA_meth_get_finish, RSA_meth_set_finish, RSA_meth_get_sign, RSA_meth_set_sign, RSA_meth_get_verify, RSA_meth_set_verify, RSA_meth_get_keygen, RSA_meth_set_keygen, RSA_meth_get_multi_prime_keygen, RSA_meth_set_multi_prime_keygen \&\- Routines to build up RSA methods .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/rsa.h> \& \& RSA_METHOD *RSA_meth_new(const char *name, int flags); \& void RSA_meth_free(RSA_METHOD *meth); \& \& RSA_METHOD *RSA_meth_dup(const RSA_METHOD *meth); \& \& const char *RSA_meth_get0_name(const RSA_METHOD *meth); \& int RSA_meth_set1_name(RSA_METHOD *meth, const char *name); \& \& int RSA_meth_get_flags(const RSA_METHOD *meth); \& int RSA_meth_set_flags(RSA_METHOD *meth, int flags); \& \& void *RSA_meth_get0_app_data(const RSA_METHOD *meth); \& int RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data); \& \& int (*RSA_meth_get_pub_enc(const RSA_METHOD *meth))(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, int padding); \& int RSA_meth_set_pub_enc(RSA_METHOD *rsa, \& int (*pub_enc)(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, \& int padding)); \& \& int (*RSA_meth_get_pub_dec(const RSA_METHOD *meth)) \& (int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, int padding); \& int RSA_meth_set_pub_dec(RSA_METHOD *rsa, \& int (*pub_dec)(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, \& int padding)); \& \& int (*RSA_meth_get_priv_enc(const RSA_METHOD *meth))(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, \& int padding); \& int RSA_meth_set_priv_enc(RSA_METHOD *rsa, \& int (*priv_enc)(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, int padding)); \& \& int (*RSA_meth_get_priv_dec(const RSA_METHOD *meth))(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, \& int padding); \& int RSA_meth_set_priv_dec(RSA_METHOD *rsa, \& int (*priv_dec)(int flen, const unsigned char *from, \& unsigned char *to, RSA *rsa, int padding)); \& \& /* Can be null */ \& int (*RSA_meth_get_mod_exp(const RSA_METHOD *meth))(BIGNUM *r0, const BIGNUM *i, \& RSA *rsa, BN_CTX *ctx); \& int RSA_meth_set_mod_exp(RSA_METHOD *rsa, \& int (*mod_exp)(BIGNUM *r0, const BIGNUM *i, RSA *rsa, \& BN_CTX *ctx)); \& \& /* Can be null */ \& int (*RSA_meth_get_bn_mod_exp(const RSA_METHOD *meth))(BIGNUM *r, const BIGNUM *a, \& const BIGNUM *p, const BIGNUM *m, \& BN_CTX *ctx, BN_MONT_CTX *m_ctx); \& int RSA_meth_set_bn_mod_exp(RSA_METHOD *rsa, \& int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, \& const BIGNUM *p, const BIGNUM *m, \& BN_CTX *ctx, BN_MONT_CTX *m_ctx)); \& \& /* called at new */ \& int (*RSA_meth_get_init(const RSA_METHOD *meth) (RSA *rsa); \& int RSA_meth_set_init(RSA_METHOD *rsa, int (*init (RSA *rsa)); \& \& /* called at free */ \& int (*RSA_meth_get_finish(const RSA_METHOD *meth))(RSA *rsa); \& int RSA_meth_set_finish(RSA_METHOD *rsa, int (*finish)(RSA *rsa)); \& \& int (*RSA_meth_get_sign(const RSA_METHOD *meth))(int type, const unsigned char *m, \& unsigned int m_length, \& unsigned char *sigret, \& unsigned int *siglen, const RSA *rsa); \& int RSA_meth_set_sign(RSA_METHOD *rsa, \& int (*sign)(int type, const unsigned char *m, \& unsigned int m_length, unsigned char *sigret, \& unsigned int *siglen, const RSA *rsa)); \& \& int (*RSA_meth_get_verify(const RSA_METHOD *meth))(int dtype, const unsigned char *m, \& unsigned int m_length, \& const unsigned char *sigbuf, \& unsigned int siglen, const RSA *rsa); \& int RSA_meth_set_verify(RSA_METHOD *rsa, \& int (*verify)(int dtype, const unsigned char *m, \& unsigned int m_length, \& const unsigned char *sigbuf, \& unsigned int siglen, const RSA *rsa)); \& \& int (*RSA_meth_get_keygen(const RSA_METHOD *meth))(RSA *rsa, int bits, BIGNUM *e, \& BN_GENCB *cb); \& int RSA_meth_set_keygen(RSA_METHOD *rsa, \& int (*keygen)(RSA *rsa, int bits, BIGNUM *e, \& BN_GENCB *cb)); \& \& int (*RSA_meth_get_multi_prime_keygen(const RSA_METHOD *meth))(RSA *rsa, int bits, \& int primes, BIGNUM *e, \& BN_GENCB *cb); \& \& int RSA_meth_set_multi_prime_keygen(RSA_METHOD *meth, \& int (*keygen) (RSA *rsa, int bits, \& int primes, BIGNUM *e, \& BN_GENCB *cb)); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \fB\s-1RSA_METHOD\s0\fR type is a structure used for the provision of custom \&\s-1RSA\s0 implementations. It provides a set of functions used by OpenSSL for the implementation of the various \s-1RSA\s0 capabilities. See the rsa page for more information. .PP \&\fBRSA_meth_new()\fR creates a new \fB\s-1RSA_METHOD\s0\fR structure. It should be given a unique \fBname\fR and a set of \fBflags\fR. The \fBname\fR should be a \&\s-1NULL\s0 terminated string, which will be duplicated and stored in the \&\fB\s-1RSA_METHOD\s0\fR object. It is the callers responsibility to free the original string. The flags will be used during the construction of a new \fB\s-1RSA\s0\fR object based on this \fB\s-1RSA_METHOD\s0\fR. Any new \fB\s-1RSA\s0\fR object will have those flags set by default. .PP \&\fBRSA_meth_dup()\fR creates a duplicate copy of the \fB\s-1RSA_METHOD\s0\fR object passed as a parameter. This might be useful for creating a new \&\fB\s-1RSA_METHOD\s0\fR based on an existing one, but with some differences. .PP \&\fBRSA_meth_free()\fR destroys an \fB\s-1RSA_METHOD\s0\fR structure and frees up any memory associated with it. .PP \&\fBRSA_meth_get0_name()\fR will return a pointer to the name of this \&\s-1RSA_METHOD.\s0 This is a pointer to the internal name string and so should not be freed by the caller. \fBRSA_meth_set1_name()\fR sets the name of the \s-1RSA_METHOD\s0 to \fBname\fR. The string is duplicated and the copy is stored in the \s-1RSA_METHOD\s0 structure, so the caller remains responsible for freeing the memory associated with the name. .PP \&\fBRSA_meth_get_flags()\fR returns the current value of the flags associated with this \s-1RSA_METHOD.\s0 \fBRSA_meth_set_flags()\fR provides the ability to set these flags. .PP The functions \fBRSA_meth_get0_app_data()\fR and \fBRSA_meth_set0_app_data()\fR provide the ability to associate implementation specific data with the \&\s-1RSA_METHOD.\s0 It is the application's responsibility to free this data before the \s-1RSA_METHOD\s0 is freed via a call to \fBRSA_meth_free()\fR. .PP \&\fBRSA_meth_get_sign()\fR and \fBRSA_meth_set_sign()\fR get and set the function used for creating an \s-1RSA\s0 signature respectively. This function will be called in response to the application calling \fBRSA_sign()\fR. The parameters for the function have the same meaning as for \fBRSA_sign()\fR. .PP \&\fBRSA_meth_get_verify()\fR and \fBRSA_meth_set_verify()\fR get and set the function used for verifying an \s-1RSA\s0 signature respectively. This function will be called in response to the application calling \&\fBRSA_verify()\fR. The parameters for the function have the same meaning as for \fBRSA_verify()\fR. .PP \&\fBRSA_meth_get_mod_exp()\fR and \fBRSA_meth_set_mod_exp()\fR get and set the function used for \s-1CRT\s0 computations. .PP \&\fBRSA_meth_get_bn_mod_exp()\fR and \fBRSA_meth_set_bn_mod_exp()\fR get and set the function used for \s-1CRT\s0 computations, specifically the following value: .PP .Vb 1 \& r = a ^ p mod m .Ve .PP Both the \fBmod_exp()\fR and \fBbn_mod_exp()\fR functions are called by the default OpenSSL method during encryption, decryption, signing and verification. .PP \&\fBRSA_meth_get_init()\fR and \fBRSA_meth_set_init()\fR get and set the function used for creating a new \s-1RSA\s0 instance respectively. This function will be called in response to the application calling \fBRSA_new()\fR (if the current default \s-1RSA_METHOD\s0 is this one) or \fBRSA_new_method()\fR. The \&\fBRSA_new()\fR and \fBRSA_new_method()\fR functions will allocate the memory for the new \s-1RSA\s0 object, and a pointer to this newly allocated structure will be passed as a parameter to the function. This function may be \&\s-1NULL.\s0 .PP \&\fBRSA_meth_get_finish()\fR and \fBRSA_meth_set_finish()\fR get and set the function used for destroying an instance of an \s-1RSA\s0 object respectively. This function will be called in response to the application calling \&\fBRSA_free()\fR. A pointer to the \s-1RSA\s0 to be destroyed is passed as a parameter. The destroy function should be used for \s-1RSA\s0 implementation specific clean up. The memory for the \s-1RSA\s0 itself should not be freed by this function. This function may be \s-1NULL.\s0 .PP \&\fBRSA_meth_get_keygen()\fR and \fBRSA_meth_set_keygen()\fR get and set the function used for generating a new \s-1RSA\s0 key pair respectively. This function will be called in response to the application calling \&\fBRSA_generate_key_ex()\fR. The parameter for the function has the same meaning as for \fBRSA_generate_key_ex()\fR. .PP \&\fBRSA_meth_get_multi_prime_keygen()\fR and \fBRSA_meth_set_multi_prime_keygen()\fR get and set the function used for generating a new multi-prime \s-1RSA\s0 key pair respectively. This function will be called in response to the application calling \&\fBRSA_generate_multi_prime_key()\fR. The parameter for the function has the same meaning as for \fBRSA_generate_multi_prime_key()\fR. .PP \&\fBRSA_meth_get_pub_enc()\fR, \fBRSA_meth_set_pub_enc()\fR, \&\fBRSA_meth_get_pub_dec()\fR, \fBRSA_meth_set_pub_dec()\fR, \&\fBRSA_meth_get_priv_enc()\fR, \fBRSA_meth_set_priv_enc()\fR, \&\fBRSA_meth_get_priv_dec()\fR, \fBRSA_meth_set_priv_dec()\fR get and set the functions used for public and private key encryption and decryption. These functions will be called in response to the application calling \&\fBRSA_public_encrypt()\fR, \fBRSA_private_decrypt()\fR, \fBRSA_private_encrypt()\fR and \&\fBRSA_public_decrypt()\fR and take the same parameters as those. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBRSA_meth_new()\fR and \fBRSA_meth_dup()\fR return the newly allocated \&\s-1RSA_METHOD\s0 object or \s-1NULL\s0 on failure. .PP \&\fBRSA_meth_get0_name()\fR and \fBRSA_meth_get_flags()\fR return the name and flags associated with the \s-1RSA_METHOD\s0 respectively. .PP All other RSA_meth_get_*() functions return the appropriate function pointer that has been set in the \s-1RSA_METHOD,\s0 or \s-1NULL\s0 if no such pointer has yet been set. .PP RSA_meth_set1_name and all RSA_meth_set_*() functions return 1 on success or 0 on failure. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBRSA_new\fR\|(3), \fBRSA_generate_key_ex\fR\|(3), \fBRSA_sign\fR\|(3), \&\fBRSA_set_method\fR\|(3), \fBRSA_size\fR\|(3), \fBRSA_get0_key\fR\|(3), \&\fBRSA_generate_multi_prime_key\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBRSA_meth_get_multi_prime_keygen()\fR and \fBRSA_meth_set_multi_prime_keygen()\fR were added in OpenSSL 1.1.1. .PP Other functions described here were added in OpenSSL 1.1.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2016\-2018 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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