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authorJung-uk Kim <jkim@FreeBSD.org>2020-02-21 00:33:21 +0000
committerJung-uk Kim <jkim@FreeBSD.org>2020-02-21 00:33:21 +0000
commit6b4382c4054d7c169c6140feaa144ca360a90ead (patch)
tree176bf7fdbae226099058e11e9a429805b6e0af42 /secure/lib/libcrypto/man/man3/EVP_PKEY_ASN1_METHOD.3
parent24722aacdb06a5ac6780beef7db856a0f99095c3 (diff)
downloadsrc-6b4382c4054d7c169c6140feaa144ca360a90ead.tar.gz
src-6b4382c4054d7c169c6140feaa144ca360a90ead.zip
MFC: r356963
Install man5 and man7 for OpenSSL.
Notes
Notes: svn path=/stable/12/; revision=358188
Diffstat (limited to 'secure/lib/libcrypto/man/man3/EVP_PKEY_ASN1_METHOD.3')
-rw-r--r--secure/lib/libcrypto/man/man3/EVP_PKEY_ASN1_METHOD.3553
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+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "EVP_PKEY_ASN1_METHOD 3"
+.TH EVP_PKEY_ASN1_METHOD 3 "2019-09-10" "1.1.1d" "OpenSSL"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+EVP_PKEY_ASN1_METHOD, EVP_PKEY_asn1_new, EVP_PKEY_asn1_copy, EVP_PKEY_asn1_free, EVP_PKEY_asn1_add0, EVP_PKEY_asn1_add_alias, EVP_PKEY_asn1_set_public, EVP_PKEY_asn1_set_private, EVP_PKEY_asn1_set_param, EVP_PKEY_asn1_set_free, EVP_PKEY_asn1_set_ctrl, EVP_PKEY_asn1_set_item, EVP_PKEY_asn1_set_siginf, EVP_PKEY_asn1_set_check, EVP_PKEY_asn1_set_public_check, EVP_PKEY_asn1_set_param_check, EVP_PKEY_asn1_set_security_bits, EVP_PKEY_asn1_set_set_priv_key, EVP_PKEY_asn1_set_set_pub_key, EVP_PKEY_asn1_set_get_priv_key, EVP_PKEY_asn1_set_get_pub_key, EVP_PKEY_get0_asn1 \&\- manipulating and registering EVP_PKEY_ASN1_METHOD structure
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/evp.h>
+\&
+\& typedef struct evp_pkey_asn1_method_st EVP_PKEY_ASN1_METHOD;
+\&
+\& EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
+\& const char *pem_str,
+\& const char *info);
+\& void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
+\& const EVP_PKEY_ASN1_METHOD *src);
+\& void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth);
+\& int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth);
+\& int EVP_PKEY_asn1_add_alias(int to, int from);
+\&
+\& void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*pub_decode) (EVP_PKEY *pk,
+\& X509_PUBKEY *pub),
+\& int (*pub_encode) (X509_PUBKEY *pub,
+\& const EVP_PKEY *pk),
+\& int (*pub_cmp) (const EVP_PKEY *a,
+\& const EVP_PKEY *b),
+\& int (*pub_print) (BIO *out,
+\& const EVP_PKEY *pkey,
+\& int indent, ASN1_PCTX *pctx),
+\& int (*pkey_size) (const EVP_PKEY *pk),
+\& int (*pkey_bits) (const EVP_PKEY *pk));
+\& void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*priv_decode) (EVP_PKEY *pk,
+\& const PKCS8_PRIV_KEY_INFO
+\& *p8inf),
+\& int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
+\& const EVP_PKEY *pk),
+\& int (*priv_print) (BIO *out,
+\& const EVP_PKEY *pkey,
+\& int indent,
+\& ASN1_PCTX *pctx));
+\& void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*param_decode) (EVP_PKEY *pkey,
+\& const unsigned char **pder,
+\& int derlen),
+\& int (*param_encode) (const EVP_PKEY *pkey,
+\& unsigned char **pder),
+\& int (*param_missing) (const EVP_PKEY *pk),
+\& int (*param_copy) (EVP_PKEY *to,
+\& const EVP_PKEY *from),
+\& int (*param_cmp) (const EVP_PKEY *a,
+\& const EVP_PKEY *b),
+\& int (*param_print) (BIO *out,
+\& const EVP_PKEY *pkey,
+\& int indent,
+\& ASN1_PCTX *pctx));
+\&
+\& void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
+\& void (*pkey_free) (EVP_PKEY *pkey));
+\& void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
+\& long arg1, void *arg2));
+\& void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*item_verify) (EVP_MD_CTX *ctx,
+\& const ASN1_ITEM *it,
+\& void *asn,
+\& X509_ALGOR *a,
+\& ASN1_BIT_STRING *sig,
+\& EVP_PKEY *pkey),
+\& int (*item_sign) (EVP_MD_CTX *ctx,
+\& const ASN1_ITEM *it,
+\& void *asn,
+\& X509_ALGOR *alg1,
+\& X509_ALGOR *alg2,
+\& ASN1_BIT_STRING *sig));
+\&
+\& void EVP_PKEY_asn1_set_siginf(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*siginf_set) (X509_SIG_INFO *siginf,
+\& const X509_ALGOR *alg,
+\& const ASN1_STRING *sig));
+\&
+\& void EVP_PKEY_asn1_set_check(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*pkey_check) (const EVP_PKEY *pk));
+\&
+\& void EVP_PKEY_asn1_set_public_check(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*pkey_pub_check) (const EVP_PKEY *pk));
+\&
+\& void EVP_PKEY_asn1_set_param_check(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*pkey_param_check) (const EVP_PKEY *pk));
+\&
+\& void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*pkey_security_bits) (const EVP_PKEY
+\& *pk));
+\&
+\& void EVP_PKEY_asn1_set_set_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*set_priv_key) (EVP_PKEY *pk,
+\& const unsigned char
+\& *priv,
+\& size_t len));
+\&
+\& void EVP_PKEY_asn1_set_set_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*set_pub_key) (EVP_PKEY *pk,
+\& const unsigned char *pub,
+\& size_t len));
+\&
+\& void EVP_PKEY_asn1_set_get_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*get_priv_key) (const EVP_PKEY *pk,
+\& unsigned char *priv,
+\& size_t *len));
+\&
+\& void EVP_PKEY_asn1_set_get_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
+\& int (*get_pub_key) (const EVP_PKEY *pk,
+\& unsigned char *pub,
+\& size_t *len));
+\&
+\& const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR is a structure which holds a set of \s-1ASN.1\s0
+conversion, printing and information methods for a specific public key
+algorithm.
+.PP
+There are two places where the \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR objects are
+stored: one is a built-in 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
+\&\fBEVP_PKEY_asn1_add0\fR\|(3).
+.SS "Methods"
+.IX Subsection "Methods"
+The methods are the underlying implementations of a particular public
+key algorithm present by the \fB\s-1EVP_PKEY\s0\fR object.
+.PP
+.Vb 5
+\& int (*pub_decode) (EVP_PKEY *pk, X509_PUBKEY *pub);
+\& int (*pub_encode) (X509_PUBKEY *pub, const EVP_PKEY *pk);
+\& int (*pub_cmp) (const EVP_PKEY *a, const EVP_PKEY *b);
+\& int (*pub_print) (BIO *out, const EVP_PKEY *pkey, int indent,
+\& ASN1_PCTX *pctx);
+.Ve
+.PP
+The \fBpub_decode()\fR and \fBpub_encode()\fR methods are called to decode /
+encode \fBX509_PUBKEY\fR \s-1ASN.1\s0 parameters to / from \fBpk\fR.
+They \s-1MUST\s0 return 0 on error, 1 on success.
+They're called by \fBX509_PUBKEY_get0\fR\|(3) and \fBX509_PUBKEY_set\fR\|(3).
+.PP
+The \fBpub_cmp()\fR method is called when two public keys are to be
+compared.
+It \s-1MUST\s0 return 1 when the keys are equal, 0 otherwise.
+It's called by \fBEVP_PKEY_cmp\fR\|(3).
+.PP
+The \fBpub_print()\fR method is called to print a public key in humanly
+readable text to \fBout\fR, indented \fBindent\fR spaces.
+It \s-1MUST\s0 return 0 on error, 1 on success.
+It's called by \fBEVP_PKEY_print_public\fR\|(3).
+.PP
+.Vb 4
+\& int (*priv_decode) (EVP_PKEY *pk, const PKCS8_PRIV_KEY_INFO *p8inf);
+\& int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk);
+\& int (*priv_print) (BIO *out, const EVP_PKEY *pkey, int indent,
+\& ASN1_PCTX *pctx);
+.Ve
+.PP
+The \fBpriv_decode()\fR and \fBpriv_encode()\fR methods are called to decode /
+encode \fB\s-1PKCS8_PRIV_KEY_INFO\s0\fR form private key to / from \fBpk\fR.
+They \s-1MUST\s0 return 0 on error, 1 on success.
+They're called by \s-1\fBEVP_PKCS82PKEY\s0\fR\|(3) and \s-1\fBEVP_PKEY2PKCS8\s0\fR\|(3).
+.PP
+The \fBpriv_print()\fR method is called to print a private key in humanly
+readable text to \fBout\fR, indented \fBindent\fR spaces.
+It \s-1MUST\s0 return 0 on error, 1 on success.
+It's called by \fBEVP_PKEY_print_private\fR\|(3).
+.PP
+.Vb 3
+\& int (*pkey_size) (const EVP_PKEY *pk);
+\& int (*pkey_bits) (const EVP_PKEY *pk);
+\& int (*pkey_security_bits) (const EVP_PKEY *pk);
+.Ve
+.PP
+The \fBpkey_size()\fR method returns the key size in bytes.
+It's called by \fBEVP_PKEY_size\fR\|(3).
+.PP
+The \fBpkey_bits()\fR method returns the key size in bits.
+It's called by \fBEVP_PKEY_bits\fR\|(3).
+.PP
+.Vb 8
+\& int (*param_decode) (EVP_PKEY *pkey,
+\& const unsigned char **pder, int derlen);
+\& int (*param_encode) (const EVP_PKEY *pkey, unsigned char **pder);
+\& int (*param_missing) (const EVP_PKEY *pk);
+\& int (*param_copy) (EVP_PKEY *to, const EVP_PKEY *from);
+\& int (*param_cmp) (const EVP_PKEY *a, const EVP_PKEY *b);
+\& int (*param_print) (BIO *out, const EVP_PKEY *pkey, int indent,
+\& ASN1_PCTX *pctx);
+.Ve
+.PP
+The \fBparam_decode()\fR and \fBparam_encode()\fR methods are called to decode /
+encode \s-1DER\s0 formatted parameters to / from \fBpk\fR.
+They \s-1MUST\s0 return 0 on error, 1 on success.
+They're called by \fBPEM_read_bio_Parameters\fR\|(3) and the \fBfile:\fR
+\&\s-1\fBOSSL_STORE_LOADER\s0\fR\|(3).
+.PP
+The \fBparam_missing()\fR method returns 0 if a key parameter is missing,
+otherwise 1.
+It's called by \fBEVP_PKEY_missing_parameters\fR\|(3).
+.PP
+The \fBparam_copy()\fR method copies key parameters from \fBfrom\fR to \fBto\fR.
+It \s-1MUST\s0 return 0 on error, 1 on success.
+It's called by \fBEVP_PKEY_copy_parameters\fR\|(3).
+.PP
+The \fBparam_cmp()\fR method compares the parameters of keys \fBa\fR and \fBb\fR.
+It \s-1MUST\s0 return 1 when the keys are equal, 0 when not equal, or a
+negative number on error.
+It's called by \fBEVP_PKEY_cmp_parameters\fR\|(3).
+.PP
+The \fBparam_print()\fR method prints the private key parameters in humanly
+readable text to \fBout\fR, indented \fBindent\fR spaces.
+It \s-1MUST\s0 return 0 on error, 1 on success.
+It's called by \fBEVP_PKEY_print_params\fR\|(3).
+.PP
+.Vb 3
+\& int (*sig_print) (BIO *out,
+\& const X509_ALGOR *sigalg, const ASN1_STRING *sig,
+\& int indent, ASN1_PCTX *pctx);
+.Ve
+.PP
+The \fBsig_print()\fR method prints a signature in humanly readable text to
+\&\fBout\fR, indented \fBindent\fR spaces.
+\&\fBsigalg\fR contains the exact signature algorithm.
+If the signature in \fBsig\fR doesn't correspond to what this method
+expects, \fBX509_signature_dump()\fR must be used as a last resort.
+It \s-1MUST\s0 return 0 on error, 1 on success.
+It's called by \fBX509_signature_print\fR\|(3).
+.PP
+.Vb 1
+\& void (*pkey_free) (EVP_PKEY *pkey);
+.Ve
+.PP
+The \fBpkey_free()\fR method helps freeing the internals of \fBpkey\fR.
+It's called by \fBEVP_PKEY_free\fR\|(3), \fBEVP_PKEY_set_type\fR\|(3),
+\&\fBEVP_PKEY_set_type_str\fR\|(3), and \fBEVP_PKEY_assign\fR\|(3).
+.PP
+.Vb 1
+\& int (*pkey_ctrl) (EVP_PKEY *pkey, int op, long arg1, void *arg2);
+.Ve
+.PP
+The \fBpkey_ctrl()\fR method adds extra algorithm specific control.
+It's called by \fBEVP_PKEY_get_default_digest_nid\fR\|(3),
+\&\fBEVP_PKEY_set1_tls_encodedpoint\fR\|(3),
+\&\fBEVP_PKEY_get1_tls_encodedpoint\fR\|(3), \fBPKCS7_SIGNER_INFO_set\fR\|(3),
+\&\fBPKCS7_RECIP_INFO_set\fR\|(3), ...
+.PP
+.Vb 3
+\& int (*old_priv_decode) (EVP_PKEY *pkey,
+\& const unsigned char **pder, int derlen);
+\& int (*old_priv_encode) (const EVP_PKEY *pkey, unsigned char **pder);
+.Ve
+.PP
+The \fBold_priv_decode()\fR and \fBold_priv_encode()\fR methods decode / encode
+they private key \fBpkey\fR from / to a \s-1DER\s0 formatted array.
+These are exclusively used to help decoding / encoding older (pre
+PKCS#8) \s-1PEM\s0 formatted encrypted private keys.
+\&\fBold_priv_decode()\fR \s-1MUST\s0 return 0 on error, 1 on success.
+\&\fBold_priv_encode()\fR \s-1MUST\s0 the return same kind of values as
+\&\fBi2d_PrivateKey()\fR.
+They're called by \fBd2i_PrivateKey\fR\|(3) and \fBi2d_PrivateKey\fR\|(3).
+.PP
+.Vb 5
+\& int (*item_verify) (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+\& X509_ALGOR *a, ASN1_BIT_STRING *sig, EVP_PKEY *pkey);
+\& int (*item_sign) (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
+\& X509_ALGOR *alg1, X509_ALGOR *alg2,
+\& ASN1_BIT_STRING *sig);
+.Ve
+.PP
+The \fBitem_sign()\fR and \fBitem_verify()\fR methods make it possible to have
+algorithm specific signatures and verification of them.
+.PP
+\&\fBitem_sign()\fR \s-1MUST\s0 return one of:
+.IP "<=0" 4
+.IX Item "<=0"
+error
+.IP "1" 4
+.IX Item "1"
+\&\fBitem_sign()\fR did everything, OpenSSL internals just needs to pass the
+signature length back.
+.IP "2" 4
+.IX Item "2"
+\&\fBitem_sign()\fR did nothing, OpenSSL internal standard routines are
+expected to continue with the default signature production.
+.IP "3" 4
+.IX Item "3"
+\&\fBitem_sign()\fR set the algorithm identifier \fBalgor1\fR and \fBalgor2\fR,
+OpenSSL internals should just sign using those algorithms.
+.PP
+\&\fBitem_verify()\fR \s-1MUST\s0 return one of:
+.IP "<=0" 4
+.IX Item "<=0"
+error
+.IP "1" 4
+.IX Item "1"
+\&\fBitem_sign()\fR did everything, OpenSSL internals just needs to pass the
+signature length back.
+.IP "2" 4
+.IX Item "2"
+\&\fBitem_sign()\fR did nothing, OpenSSL internal standard routines are
+expected to continue with the default signature production.
+.PP
+\&\fBitem_verify()\fR and \fBitem_sign()\fR are called by \fBASN1_item_verify\fR\|(3) and
+\&\fBASN1_item_sign\fR\|(3), and by extension, \fBX509_verify\fR\|(3),
+\&\fBX509_REQ_verify\fR\|(3), \fBX509_sign\fR\|(3), \fBX509_REQ_sign\fR\|(3), ...
+.PP
+.Vb 2
+\& int (*siginf_set) (X509_SIG_INFO *siginf, const X509_ALGOR *alg,
+\& const ASN1_STRING *sig);
+.Ve
+.PP
+The \fBsiginf_set()\fR method is used to set custom \fBX509_SIG_INFO\fR
+parameters.
+It \s-1MUST\s0 return 0 on error, or 1 on success.
+It's called as part of \fBX509_check_purpose\fR\|(3), \fBX509_check_ca\fR\|(3)
+and \fBX509_check_issued\fR\|(3).
+.PP
+.Vb 3
+\& int (*pkey_check) (const EVP_PKEY *pk);
+\& int (*pkey_public_check) (const EVP_PKEY *pk);
+\& int (*pkey_param_check) (const EVP_PKEY *pk);
+.Ve
+.PP
+The \fBpkey_check()\fR, \fBpkey_public_check()\fR and \fBpkey_param_check()\fR methods are used
+to check the validity of \fBpk\fR for key-pair, public component and parameters,
+respectively.
+They \s-1MUST\s0 return 0 for an invalid key, or 1 for a valid key.
+They are called by \fBEVP_PKEY_check\fR\|(3), \fBEVP_PKEY_public_check\fR\|(3) and
+\&\fBEVP_PKEY_param_check\fR\|(3) respectively.
+.PP
+.Vb 2
+\& int (*set_priv_key) (EVP_PKEY *pk, const unsigned char *priv, size_t len);
+\& int (*set_pub_key) (EVP_PKEY *pk, const unsigned char *pub, size_t len);
+.Ve
+.PP
+The \fBset_priv_key()\fR and \fBset_pub_key()\fR methods are used to set the raw private and
+public key data for an \s-1EVP_PKEY.\s0 They \s-1MUST\s0 return 0 on error, or 1 on success.
+They are called by \fBEVP_PKEY_new_raw_private_key\fR\|(3), and
+\&\fBEVP_PKEY_new_raw_public_key\fR\|(3) respectively.
+.SS "Functions"
+.IX Subsection "Functions"
+\&\fBEVP_PKEY_asn1_new()\fR creates and returns a new \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR
+object, and associates the given \fBid\fR, \fBflags\fR, \fBpem_str\fR and
+\&\fBinfo\fR.
+\&\fBid\fR is a \s-1NID,\s0 \fBpem_str\fR is the \s-1PEM\s0 type string, \fBinfo\fR is a
+descriptive string.
+The following \fBflags\fR are supported:
+.PP
+.Vb 1
+\& ASN1_PKEY_SIGPARAM_NULL
+.Ve
+.PP
+If \fB\s-1ASN1_PKEY_SIGPARAM_NULL\s0\fR is set, then the signature algorithm
+parameters are given the type \fBV_ASN1_NULL\fR by default, otherwise
+they will be given the type \fBV_ASN1_UNDEF\fR (i.e. the parameter is
+omitted).
+See \fBX509_ALGOR_set0\fR\|(3) for more information.
+.PP
+\&\fBEVP_PKEY_asn1_copy()\fR copies an \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR object from
+\&\fBsrc\fR to \fBdst\fR.
+This function is not thread safe, it's recommended to only use this
+when initializing the application.
+.PP
+\&\fBEVP_PKEY_asn1_free()\fR frees an existing \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR pointed
+by \fBameth\fR.
+.PP
+\&\fBEVP_PKEY_asn1_add0()\fR adds \fBameth\fR to the user defined stack of
+methods unless another \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR with the same \s-1NID\s0 is
+already there.
+This function is not thread safe, it's recommended to only use this
+when initializing the application.
+.PP
+\&\fBEVP_PKEY_asn1_add_alias()\fR creates an alias with the \s-1NID\s0 \fBto\fR for the
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR with \s-1NID\s0 \fBfrom\fR unless another
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR with the same \s-1NID\s0 is already added.
+This function is not thread safe, it's recommended to only use this
+when initializing the application.
+.PP
+\&\fBEVP_PKEY_asn1_set_public()\fR, \fBEVP_PKEY_asn1_set_private()\fR,
+\&\fBEVP_PKEY_asn1_set_param()\fR, \fBEVP_PKEY_asn1_set_free()\fR,
+\&\fBEVP_PKEY_asn1_set_ctrl()\fR, \fBEVP_PKEY_asn1_set_item()\fR,
+\&\fBEVP_PKEY_asn1_set_siginf()\fR, \fBEVP_PKEY_asn1_set_check()\fR,
+\&\fBEVP_PKEY_asn1_set_public_check()\fR, \fBEVP_PKEY_asn1_set_param_check()\fR,
+\&\fBEVP_PKEY_asn1_set_security_bits()\fR, \fBEVP_PKEY_asn1_set_set_priv_key()\fR,
+\&\fBEVP_PKEY_asn1_set_set_pub_key()\fR, \fBEVP_PKEY_asn1_set_get_priv_key()\fR and
+\&\fBEVP_PKEY_asn1_set_get_pub_key()\fR set the diverse methods of the given
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR object.
+.PP
+\&\fBEVP_PKEY_get0_asn1()\fR finds the \fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR associated
+with the key \fBpkey\fR.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fBEVP_PKEY_asn1_new()\fR returns \s-1NULL\s0 on error, or a pointer to an
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR object otherwise.
+.PP
+\&\fBEVP_PKEY_asn1_add0()\fR and \fBEVP_PKEY_asn1_add_alias()\fR return 0 on error,
+or 1 on success.
+.PP
+\&\fBEVP_PKEY_get0_asn1()\fR returns \s-1NULL\s0 on error, or a pointer to a constant
+\&\fB\s-1EVP_PKEY_ASN1_METHOD\s0\fR object otherwise.
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright 2017\-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>.