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Diffstat (limited to 'secure/lib/libcrypto/man/EVP_PKEY_meth_new.3')
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diff --git a/secure/lib/libcrypto/man/EVP_PKEY_meth_new.3 b/secure/lib/libcrypto/man/EVP_PKEY_meth_new.3 new file mode 100644 index 0000000..d978226 --- /dev/null +++ b/secure/lib/libcrypto/man/EVP_PKEY_meth_new.3 @@ -0,0 +1,531 @@ +.\" Automatically generated by Pod::Man 4.07 (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" +EVP_PKEY_meth_new, EVP_PKEY_meth_free, EVP_PKEY_meth_copy, EVP_PKEY_meth_find, +EVP_PKEY_meth_add0, EVP_PKEY_METHOD, +EVP_PKEY_meth_set_init, EVP_PKEY_meth_set_copy, EVP_PKEY_meth_set_cleanup, +EVP_PKEY_meth_set_paramgen, EVP_PKEY_meth_set_keygen, EVP_PKEY_meth_set_sign, +EVP_PKEY_meth_set_verify, EVP_PKEY_meth_set_verify_recover, EVP_PKEY_meth_set_signctx, +EVP_PKEY_meth_set_verifyctx, EVP_PKEY_meth_set_encrypt, EVP_PKEY_meth_set_decrypt, +EVP_PKEY_meth_set_derive, EVP_PKEY_meth_set_ctrl, +EVP_PKEY_meth_get_init, EVP_PKEY_meth_get_copy, EVP_PKEY_meth_get_cleanup, +EVP_PKEY_meth_get_paramgen, EVP_PKEY_meth_get_keygen, EVP_PKEY_meth_get_sign, +EVP_PKEY_meth_get_verify, EVP_PKEY_meth_get_verify_recover, EVP_PKEY_meth_get_signctx, +EVP_PKEY_meth_get_verifyctx, EVP_PKEY_meth_get_encrypt, EVP_PKEY_meth_get_decrypt, +EVP_PKEY_meth_get_derive, EVP_PKEY_meth_get_ctrl +\&\- manipulating EVP_PKEY_METHOD structure +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/evp.h> +\& +\& typedef struct evp_pkey_method_st EVP_PKEY_METHOD; +\& +\& EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags); +\& void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth); +\& void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src); +\& const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type); +\& int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth); +\& +\& void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth, +\& int (*init) (EVP_PKEY_CTX *ctx)); +\& void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth, +\& int (*copy) (EVP_PKEY_CTX *dst, +\& EVP_PKEY_CTX *src)); +\& void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth, +\& void (*cleanup) (EVP_PKEY_CTX *ctx)); +\& void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth, +\& int (*paramgen_init) (EVP_PKEY_CTX *ctx), +\& int (*paramgen) (EVP_PKEY_CTX *ctx, +\& EVP_PKEY *pkey)); +\& void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth, +\& int (*keygen_init) (EVP_PKEY_CTX *ctx), +\& int (*keygen) (EVP_PKEY_CTX *ctx, +\& EVP_PKEY *pkey)); +\& void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth, +\& int (*sign_init) (EVP_PKEY_CTX *ctx), +\& int (*sign) (EVP_PKEY_CTX *ctx, +\& unsigned char *sig, size_t *siglen, +\& const unsigned char *tbs, +\& size_t tbslen)); +\& void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth, +\& int (*verify_init) (EVP_PKEY_CTX *ctx), +\& int (*verify) (EVP_PKEY_CTX *ctx, +\& const unsigned char *sig, +\& size_t siglen, +\& const unsigned char *tbs, +\& size_t tbslen)); +\& void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth, +\& int (*verify_recover_init) (EVP_PKEY_CTX +\& *ctx), +\& int (*verify_recover) (EVP_PKEY_CTX +\& *ctx, +\& unsigned char +\& *sig, +\& size_t *siglen, +\& const unsigned +\& char *tbs, +\& size_t tbslen)); +\& void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth, +\& int (*signctx_init) (EVP_PKEY_CTX *ctx, +\& EVP_MD_CTX *mctx), +\& int (*signctx) (EVP_PKEY_CTX *ctx, +\& unsigned char *sig, +\& size_t *siglen, +\& EVP_MD_CTX *mctx)); +\& void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth, +\& int (*verifyctx_init) (EVP_PKEY_CTX *ctx, +\& EVP_MD_CTX *mctx), +\& int (*verifyctx) (EVP_PKEY_CTX *ctx, +\& const unsigned char *sig, +\& int siglen, +\& EVP_MD_CTX *mctx)); +\& void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth, +\& int (*encrypt_init) (EVP_PKEY_CTX *ctx), +\& int (*encryptfn) (EVP_PKEY_CTX *ctx, +\& unsigned char *out, +\& size_t *outlen, +\& const unsigned char *in, +\& size_t inlen)); +\& void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth, +\& int (*decrypt_init) (EVP_PKEY_CTX *ctx), +\& int (*decrypt) (EVP_PKEY_CTX *ctx, +\& unsigned char *out, +\& size_t *outlen, +\& const unsigned char *in, +\& size_t inlen)); +\& void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth, +\& int (*derive_init) (EVP_PKEY_CTX *ctx), +\& int (*derive) (EVP_PKEY_CTX *ctx, +\& unsigned char *key, +\& size_t *keylen)); +\& void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth, +\& int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, +\& void *p2), +\& int (*ctrl_str) (EVP_PKEY_CTX *ctx, +\& const char *type, +\& const char *value)); +\& +\& void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth, +\& int (**pinit) (EVP_PKEY_CTX *ctx)); +\& void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth, +\& int (**pcopy) (EVP_PKEY_CTX *dst, +\& EVP_PKEY_CTX *src)); +\& void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth, +\& void (**pcleanup) (EVP_PKEY_CTX *ctx)); +\& void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth, +\& int (**pparamgen_init) (EVP_PKEY_CTX *ctx), +\& int (**pparamgen) (EVP_PKEY_CTX *ctx, +\& EVP_PKEY *pkey)); +\& void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth, +\& int (**pkeygen_init) (EVP_PKEY_CTX *ctx), +\& int (**pkeygen) (EVP_PKEY_CTX *ctx, +\& EVP_PKEY *pkey)); +\& void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth, +\& int (**psign_init) (EVP_PKEY_CTX *ctx), +\& int (**psign) (EVP_PKEY_CTX *ctx, +\& unsigned char *sig, size_t *siglen, +\& const unsigned char *tbs, +\& size_t tbslen)); +\& void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth, +\& int (**pverify_init) (EVP_PKEY_CTX *ctx), +\& int (**pverify) (EVP_PKEY_CTX *ctx, +\& const unsigned char *sig, +\& size_t siglen, +\& const unsigned char *tbs, +\& size_t tbslen)); +\& void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth, +\& int (**pverify_recover_init) (EVP_PKEY_CTX +\& *ctx), +\& int (**pverify_recover) (EVP_PKEY_CTX +\& *ctx, +\& unsigned char +\& *sig, +\& size_t *siglen, +\& const unsigned +\& char *tbs, +\& size_t tbslen)); +\& void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth, +\& int (**psignctx_init) (EVP_PKEY_CTX *ctx, +\& EVP_MD_CTX *mctx), +\& int (**psignctx) (EVP_PKEY_CTX *ctx, +\& unsigned char *sig, +\& size_t *siglen, +\& EVP_MD_CTX *mctx)); +\& void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth, +\& int (**pverifyctx_init) (EVP_PKEY_CTX *ctx, +\& EVP_MD_CTX *mctx), +\& int (**pverifyctx) (EVP_PKEY_CTX *ctx, +\& const unsigned char *sig, +\& int siglen, +\& EVP_MD_CTX *mctx)); +\& void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth, +\& int (**pencrypt_init) (EVP_PKEY_CTX *ctx), +\& int (**pencryptfn) (EVP_PKEY_CTX *ctx, +\& unsigned char *out, +\& size_t *outlen, +\& const unsigned char *in, +\& size_t inlen)); +\& void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth, +\& int (**pdecrypt_init) (EVP_PKEY_CTX *ctx), +\& int (**pdecrypt) (EVP_PKEY_CTX *ctx, +\& unsigned char *out, +\& size_t *outlen, +\& const unsigned char *in, +\& size_t inlen)); +\& void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth, +\& int (**pderive_init) (EVP_PKEY_CTX *ctx), +\& int (**pderive) (EVP_PKEY_CTX *ctx, +\& unsigned char *key, +\& size_t *keylen)); +\& void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth, +\& int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1, +\& void *p2), +\& int (**pctrl_str) (EVP_PKEY_CTX *ctx, +\& const char *type, +\& const char *value)); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fB\s-1EVP_PKEY_METHOD\s0\fR is a structure which holds a set of methods for a +specific public key cryptographic algorithm. Those methods are usually +used to perform different jobs, such as generating a key, signing or +verifying, encrypting or decrypting, etc. +.PP +There are two places where the \fB\s-1EVP_PKEY_METHOD\s0\fR objects are stored: one +is a built-in static array representing the standard methods for different +algorithms, and the other one is a stack of user-defined application-specific +methods, which can be manipulated by using \fIEVP_PKEY_meth_add0\fR\|(3). +.PP +The \fB\s-1EVP_PKEY_METHOD\s0\fR objects are usually referenced by \fB\s-1EVP_PKEY_CTX\s0\fR +objects. +.SS "Methods" +.IX Subsection "Methods" +The methods are the underlying implementations of a particular public key +algorithm present by the \fB\s-1EVP_PKEY_CTX\s0\fR object. +.PP +.Vb 3 +\& int (*init) (EVP_PKEY_CTX *ctx); +\& int (*copy) (EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src); +\& void (*cleanup) (EVP_PKEY_CTX *ctx); +.Ve +.PP +The \fIinit()\fR method is called to initialize algorithm-specific data when a new +\&\fB\s-1EVP_PKEY_CTX\s0\fR is created. As opposed to \fIinit()\fR, the \fIcleanup()\fR method is called +when an \fB\s-1EVP_PKEY_CTX\s0\fR is freed. The \fIcopy()\fR method is called when an \fB\s-1EVP_PKEY_CTX\s0\fR +is being duplicated. Refer to \fIEVP_PKEY_CTX_new\fR\|(3), \fIEVP_PKEY_CTX_new_id\fR\|(3), +\&\fIEVP_PKEY_CTX_free\fR\|(3) and \fIEVP_PKEY_CTX_dup\fR\|(3). +.PP +.Vb 2 +\& int (*paramgen_init) (EVP_PKEY_CTX *ctx); +\& int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey); +.Ve +.PP +The \fIparamgen_init()\fR and \fIparamgen()\fR methods deal with key parameter generation. +They are called by \fIEVP_PKEY_paramgen_init\fR\|(3) and \fIEVP_PKEY_paramgen\fR\|(3) to +handle the parameter generation process. +.PP +.Vb 2 +\& int (*keygen_init) (EVP_PKEY_CTX *ctx); +\& int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey); +.Ve +.PP +The \fIkeygen_init()\fR and \fIkeygen()\fR methods are used to generate the actual key for +the specified algorithm. They are called by \fIEVP_PKEY_keygen_init\fR\|(3) and +\&\fIEVP_PKEY_keygen\fR\|(3). +.PP +.Vb 3 +\& int (*sign_init) (EVP_PKEY_CTX *ctx); +\& int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, +\& const unsigned char *tbs, size_t tbslen); +.Ve +.PP +The \fIsign_init()\fR and \fIsign()\fR methods are used to generate the signature of a +piece of data using a private key. They are called by \fIEVP_PKEY_sign_init\fR\|(3) +and \fIEVP_PKEY_sign\fR\|(3). +.PP +.Vb 4 +\& int (*verify_init) (EVP_PKEY_CTX *ctx); +\& int (*verify) (EVP_PKEY_CTX *ctx, +\& const unsigned char *sig, size_t siglen, +\& const unsigned char *tbs, size_t tbslen); +.Ve +.PP +The \fIverify_init()\fR and \fIverify()\fR methods are used to verify whether a signature is +valid. They are called by \fIEVP_PKEY_verify_init\fR\|(3) and \fIEVP_PKEY_verify\fR\|(3). +.PP +.Vb 4 +\& int (*verify_recover_init) (EVP_PKEY_CTX *ctx); +\& int (*verify_recover) (EVP_PKEY_CTX *ctx, +\& unsigned char *rout, size_t *routlen, +\& const unsigned char *sig, size_t siglen); +.Ve +.PP +The \fIverify_recover_init()\fR and \fIverify_recover()\fR methods are used to verify a +signature and then recover the digest from the signature (for instance, a +signature that was generated by \s-1RSA\s0 signing algorithm). They are called by +\&\fIEVP_PKEY_verify_recover_init\fR\|(3) and \fIEVP_PKEY_verify_recover\fR\|(3). +.PP +.Vb 3 +\& int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx); +\& int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, +\& EVP_MD_CTX *mctx); +.Ve +.PP +The \fIsignctx_init()\fR and \fIsignctx()\fR methods are used to sign a digest present by +a \fB\s-1EVP_MD_CTX\s0\fR object. They are called by the EVP_DigestSign functions. See +\&\fIEVP_DigestSignInit\fR\|(3) for detail. +.PP +.Vb 3 +\& int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx); +\& int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen, +\& EVP_MD_CTX *mctx); +.Ve +.PP +The \fIverifyctx_init()\fR and \fIverifyctx()\fR methods are used to verify a signature +against the data in a \fB\s-1EVP_MD_CTX\s0\fR object. They are called by the various +EVP_DigestVerify functions. See \fIEVP_DigestVerifyInit\fR\|(3) for detail. +.PP +.Vb 3 +\& int (*encrypt_init) (EVP_PKEY_CTX *ctx); +\& int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, +\& const unsigned char *in, size_t inlen); +.Ve +.PP +The \fIencrypt_init()\fR and \fIencrypt()\fR methods are used to encrypt a piece of data. +They are called by \fIEVP_PKEY_encrypt_init\fR\|(3) and \fIEVP_PKEY_encrypt\fR\|(3). +.PP +.Vb 3 +\& int (*decrypt_init) (EVP_PKEY_CTX *ctx); +\& int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, +\& const unsigned char *in, size_t inlen); +.Ve +.PP +The \fIdecrypt_init()\fR and \fIdecrypt()\fR methods are used to decrypt a piece of data. +They are called by \fIEVP_PKEY_decrypt_init\fR\|(3) and \fIEVP_PKEY_decrypt\fR\|(3). +.PP +.Vb 2 +\& int (*derive_init) (EVP_PKEY_CTX *ctx); +\& int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen); +.Ve +.PP +The \fIderive_init()\fR and \fIderive()\fR methods are used to derive the shared secret +from a public key algorithm (for instance, the \s-1DH\s0 algorithm). They are called by +\&\fIEVP_PKEY_derive_init\fR\|(3) and \fIEVP_PKEY_derive\fR\|(3). +.PP +.Vb 2 +\& int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2); +\& int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value); +.Ve +.PP +The \fIctrl()\fR and \fIctrl_str()\fR methods are used to adjust algorithm-specific +settings. See \fIEVP_PKEY_CTX_ctrl\fR\|(3) and related functions for detail. +.PP +.Vb 5 +\& int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen, +\& const unsigned char *tbs, size_t tbslen); +\& int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig, +\& size_t siglen, const unsigned char *tbs, +\& size_t tbslen); +.Ve +.PP +The \fIdigestsign()\fR and \fIdigestverify()\fR methods are used to generate or verify +a signature in a one-shot mode. They could be called by \fIEVP_DigetSign\fR\|(3) +and \fIEVP_DigestVerify\fR\|(3). +.SS "Functions" +.IX Subsection "Functions" +\&\fIEVP_PKEY_meth_new()\fR creates and returns a new \fB\s-1EVP_PKEY_METHOD\s0\fR object, +and associates the given \fBid\fR and \fBflags\fR. The following flags are +supported: +.PP +.Vb 2 +\& EVP_PKEY_FLAG_AUTOARGLEN +\& EVP_PKEY_FLAG_SIGCTX_CUSTOM +.Ve +.PP +If an \fB\s-1EVP_PKEY_METHOD\s0\fR is set with the \fB\s-1EVP_PKEY_FLAG_AUTOARGLEN\s0\fR flag, the +maximum size of the output buffer will be automatically calculated or checked +in corresponding \s-1EVP\s0 methods by the \s-1EVP\s0 framework. Thus the implementations of +these methods don't need to care about handling the case of returning output +buffer size by themselves. For details on the output buffer size, refer to +\&\fIEVP_PKEY_sign\fR\|(3). +.PP +The \fB\s-1EVP_PKEY_FLAG_SIGCTX_CUSTOM\s0\fR is used to indicate the \fIsignctx()\fR method +of an \fB\s-1EVP_PKEY_METHOD\s0\fR is always called by the \s-1EVP\s0 framework while doing a +digest signing operation by calling \fIEVP_DigestSignFinal\fR\|(3). +.PP +\&\fIEVP_PKEY_meth_free()\fR frees an existing \fB\s-1EVP_PKEY_METHOD\s0\fR pointed by +\&\fBpmeth\fR. +.PP +\&\fIEVP_PKEY_meth_copy()\fR copies an \fB\s-1EVP_PKEY_METHOD\s0\fR object from \fBsrc\fR +to \fBdst\fR. +.PP +\&\fIEVP_PKEY_meth_find()\fR finds an \fB\s-1EVP_PKEY_METHOD\s0\fR object with the \fBid\fR. +This function first searches through the user-defined method objects and +then the built-in objects. +.PP +\&\fIEVP_PKEY_meth_add0()\fR adds \fBpmeth\fR to the user defined stack of methods. +.PP +The EVP_PKEY_meth_set functions set the corresponding fields of +\&\fB\s-1EVP_PKEY_METHOD\s0\fR structure with the arguments passed. +.PP +The EVP_PKEY_meth_get functions get the corresponding fields of +\&\fB\s-1EVP_PKEY_METHOD\s0\fR structure to the arguments provided. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fIEVP_PKEY_meth_new()\fR returns a pointer to a new \fB\s-1EVP_PKEY_METHOD\s0\fR +object or returns \s-1NULL\s0 on error. +.PP +\&\fIEVP_PKEY_meth_free()\fR and \fIEVP_PKEY_meth_copy()\fR do not return values. +.PP +\&\fIEVP_PKEY_meth_find()\fR returns a pointer to the found \fB\s-1EVP_PKEY_METHOD\s0\fR +object or returns \s-1NULL\s0 if not found. +.PP +\&\fIEVP_PKEY_meth_add0()\fR returns 1 if method is added successfully or 0 +if an error occurred. +.PP +All EVP_PKEY_meth_set and EVP_PKEY_meth_get functions have no return +values. For the 'get' functions, function pointers are returned by +arguments. +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2017 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>. |
