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5ac8fb584a
We do the same thing for the "get1" version. In reality this has broader use than just TLS (it can also be used in CMS), and "encodedpoint" only makes sense when you are talking about EC based algorithms. Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/13105)
445 lines
18 KiB
Plaintext
445 lines
18 KiB
Plaintext
=pod
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=head1 NAME
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EVP_PKEY_ASN1_METHOD,
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EVP_PKEY_asn1_new,
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EVP_PKEY_asn1_copy,
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EVP_PKEY_asn1_free,
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EVP_PKEY_asn1_add0,
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EVP_PKEY_asn1_add_alias,
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EVP_PKEY_asn1_set_public,
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EVP_PKEY_asn1_set_private,
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EVP_PKEY_asn1_set_param,
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EVP_PKEY_asn1_set_free,
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EVP_PKEY_asn1_set_ctrl,
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EVP_PKEY_asn1_set_item,
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EVP_PKEY_asn1_set_siginf,
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EVP_PKEY_asn1_set_check,
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EVP_PKEY_asn1_set_public_check,
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EVP_PKEY_asn1_set_param_check,
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EVP_PKEY_asn1_set_security_bits,
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EVP_PKEY_asn1_set_set_priv_key,
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EVP_PKEY_asn1_set_set_pub_key,
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EVP_PKEY_asn1_set_get_priv_key,
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EVP_PKEY_asn1_set_get_pub_key,
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EVP_PKEY_get0_asn1
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- manipulating and registering EVP_PKEY_ASN1_METHOD structure
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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typedef struct evp_pkey_asn1_method_st EVP_PKEY_ASN1_METHOD;
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EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
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const char *pem_str,
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const char *info);
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void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
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const EVP_PKEY_ASN1_METHOD *src);
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void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth);
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int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth);
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int EVP_PKEY_asn1_add_alias(int to, int from);
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void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
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int (*pub_decode) (EVP_PKEY *pk,
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const X509_PUBKEY *pub),
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int (*pub_encode) (X509_PUBKEY *pub,
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const EVP_PKEY *pk),
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int (*pub_cmp) (const EVP_PKEY *a,
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const EVP_PKEY *b),
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int (*pub_print) (BIO *out,
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const EVP_PKEY *pkey,
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int indent, ASN1_PCTX *pctx),
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int (*pkey_size) (const EVP_PKEY *pk),
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int (*pkey_bits) (const EVP_PKEY *pk));
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void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
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int (*priv_decode) (EVP_PKEY *pk,
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const PKCS8_PRIV_KEY_INFO
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*p8inf),
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int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
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const EVP_PKEY *pk),
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int (*priv_print) (BIO *out,
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const EVP_PKEY *pkey,
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int indent,
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ASN1_PCTX *pctx));
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void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
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int (*param_decode) (EVP_PKEY *pkey,
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const unsigned char **pder,
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int derlen),
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int (*param_encode) (const EVP_PKEY *pkey,
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unsigned char **pder),
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int (*param_missing) (const EVP_PKEY *pk),
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int (*param_copy) (EVP_PKEY *to,
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const EVP_PKEY *from),
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int (*param_cmp) (const EVP_PKEY *a,
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const EVP_PKEY *b),
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int (*param_print) (BIO *out,
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const EVP_PKEY *pkey,
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int indent,
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ASN1_PCTX *pctx));
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void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
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void (*pkey_free) (EVP_PKEY *pkey));
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void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
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int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
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long arg1, void *arg2));
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void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
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int (*item_verify) (EVP_MD_CTX *ctx,
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const ASN1_ITEM *it,
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void *asn,
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X509_ALGOR *a,
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ASN1_BIT_STRING *sig,
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EVP_PKEY *pkey),
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int (*item_sign) (EVP_MD_CTX *ctx,
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const ASN1_ITEM *it,
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void *asn,
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X509_ALGOR *alg1,
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X509_ALGOR *alg2,
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ASN1_BIT_STRING *sig));
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void EVP_PKEY_asn1_set_siginf(EVP_PKEY_ASN1_METHOD *ameth,
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int (*siginf_set) (X509_SIG_INFO *siginf,
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const X509_ALGOR *alg,
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const ASN1_STRING *sig));
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void EVP_PKEY_asn1_set_check(EVP_PKEY_ASN1_METHOD *ameth,
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int (*pkey_check) (const EVP_PKEY *pk));
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void EVP_PKEY_asn1_set_public_check(EVP_PKEY_ASN1_METHOD *ameth,
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int (*pkey_pub_check) (const EVP_PKEY *pk));
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void EVP_PKEY_asn1_set_param_check(EVP_PKEY_ASN1_METHOD *ameth,
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int (*pkey_param_check) (const EVP_PKEY *pk));
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void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
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int (*pkey_security_bits) (const EVP_PKEY
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*pk));
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void EVP_PKEY_asn1_set_set_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
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int (*set_priv_key) (EVP_PKEY *pk,
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const unsigned char
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*priv,
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size_t len));
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void EVP_PKEY_asn1_set_set_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
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int (*set_pub_key) (EVP_PKEY *pk,
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const unsigned char *pub,
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size_t len));
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void EVP_PKEY_asn1_set_get_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
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int (*get_priv_key) (const EVP_PKEY *pk,
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unsigned char *priv,
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size_t *len));
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void EVP_PKEY_asn1_set_get_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
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int (*get_pub_key) (const EVP_PKEY *pk,
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unsigned char *pub,
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size_t *len));
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const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey);
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=head1 DESCRIPTION
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B<EVP_PKEY_ASN1_METHOD> is a structure which holds a set of ASN.1
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conversion, printing and information methods for a specific public key
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algorithm.
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There are two places where the B<EVP_PKEY_ASN1_METHOD> objects are
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stored: one is a built-in array representing the standard methods for
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different algorithms, and the other one is a stack of user-defined
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application-specific methods, which can be manipulated by using
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L<EVP_PKEY_asn1_add0(3)>.
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=head2 Methods
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The methods are the underlying implementations of a particular public
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key algorithm present by the B<EVP_PKEY> object.
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int (*pub_decode) (EVP_PKEY *pk, X509_PUBKEY *pub);
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int (*pub_encode) (X509_PUBKEY *pub, const EVP_PKEY *pk);
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int (*pub_cmp) (const EVP_PKEY *a, const EVP_PKEY *b);
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int (*pub_print) (BIO *out, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *pctx);
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The pub_decode() and pub_encode() methods are called to decode /
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encode B<X509_PUBKEY> ASN.1 parameters to / from B<pk>.
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They MUST return 0 on error, 1 on success.
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They're called by L<X509_PUBKEY_get0(3)> and L<X509_PUBKEY_set(3)>.
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The pub_cmp() method is called when two public keys are to be
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compared.
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It MUST return 1 when the keys are equal, 0 otherwise.
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It's called by L<EVP_PKEY_eq(3)>.
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The pub_print() method is called to print a public key in humanly
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readable text to B<out>, indented B<indent> spaces.
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It MUST return 0 on error, 1 on success.
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It's called by L<EVP_PKEY_print_public(3)>.
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int (*priv_decode) (EVP_PKEY *pk, const PKCS8_PRIV_KEY_INFO *p8inf);
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int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pk);
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int (*priv_print) (BIO *out, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *pctx);
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The priv_decode() and priv_encode() methods are called to decode /
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encode B<PKCS8_PRIV_KEY_INFO> form private key to / from B<pk>.
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They MUST return 0 on error, 1 on success.
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They're called by L<EVP_PKCS82PKEY(3)> and L<EVP_PKEY2PKCS8(3)>.
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The priv_print() method is called to print a private key in humanly
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readable text to B<out>, indented B<indent> spaces.
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It MUST return 0 on error, 1 on success.
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It's called by L<EVP_PKEY_print_private(3)>.
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int (*pkey_size) (const EVP_PKEY *pk);
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int (*pkey_bits) (const EVP_PKEY *pk);
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int (*pkey_security_bits) (const EVP_PKEY *pk);
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The pkey_size() method returns the key size in bytes.
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It's called by L<EVP_PKEY_size(3)>.
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The pkey_bits() method returns the key size in bits.
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It's called by L<EVP_PKEY_bits(3)>.
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int (*param_decode) (EVP_PKEY *pkey,
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const unsigned char **pder, int derlen);
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int (*param_encode) (const EVP_PKEY *pkey, unsigned char **pder);
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int (*param_missing) (const EVP_PKEY *pk);
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int (*param_copy) (EVP_PKEY *to, const EVP_PKEY *from);
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int (*param_cmp) (const EVP_PKEY *a, const EVP_PKEY *b);
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int (*param_print) (BIO *out, const EVP_PKEY *pkey, int indent,
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ASN1_PCTX *pctx);
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The param_decode() and param_encode() methods are called to decode /
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encode DER formatted parameters to / from B<pk>.
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They MUST return 0 on error, 1 on success.
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They're called by L<PEM_read_bio_Parameters(3)> and the B<file:>
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L<OSSL_STORE_LOADER(3)>.
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The param_missing() method returns 0 if a key parameter is missing,
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otherwise 1.
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It's called by L<EVP_PKEY_missing_parameters(3)>.
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The param_copy() method copies key parameters from B<from> to B<to>.
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It MUST return 0 on error, 1 on success.
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It's called by L<EVP_PKEY_copy_parameters(3)>.
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The param_cmp() method compares the parameters of keys B<a> and B<b>.
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It MUST return 1 when the keys are equal, 0 when not equal, or a
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negative number on error.
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It's called by L<EVP_PKEY_parameters_eq(3)>.
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The param_print() method prints the private key parameters in humanly
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readable text to B<out>, indented B<indent> spaces.
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It MUST return 0 on error, 1 on success.
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It's called by L<EVP_PKEY_print_params(3)>.
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int (*sig_print) (BIO *out,
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const X509_ALGOR *sigalg, const ASN1_STRING *sig,
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int indent, ASN1_PCTX *pctx);
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The sig_print() method prints a signature in humanly readable text to
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B<out>, indented B<indent> spaces.
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B<sigalg> contains the exact signature algorithm.
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If the signature in B<sig> doesn't correspond to what this method
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expects, X509_signature_dump() must be used as a last resort.
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It MUST return 0 on error, 1 on success.
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It's called by L<X509_signature_print(3)>.
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void (*pkey_free) (EVP_PKEY *pkey);
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The pkey_free() method helps freeing the internals of B<pkey>.
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It's called by L<EVP_PKEY_free(3)>, L<EVP_PKEY_set_type(3)>,
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L<EVP_PKEY_set_type_str(3)>, and L<EVP_PKEY_assign(3)>.
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int (*pkey_ctrl) (EVP_PKEY *pkey, int op, long arg1, void *arg2);
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The pkey_ctrl() method adds extra algorithm specific control.
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It's called by L<EVP_PKEY_get_default_digest_nid(3)>,
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L<EVP_PKEY_supports_digest_nid(3)>,
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L<EVP_PKEY_set1_encoded_public_key(3)>,
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L<EVP_PKEY_get1_encoded_public_key(3)>, L<PKCS7_SIGNER_INFO_set(3)>,
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L<PKCS7_RECIP_INFO_set(3)>, ...
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int (*old_priv_decode) (EVP_PKEY *pkey,
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const unsigned char **pder, int derlen);
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int (*old_priv_encode) (const EVP_PKEY *pkey, unsigned char **pder);
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The old_priv_decode() and old_priv_encode() methods decode / encode
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they private key B<pkey> from / to a DER formatted array.
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These are exclusively used to help decoding / encoding older (pre
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PKCS#8) PEM formatted encrypted private keys.
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old_priv_decode() MUST return 0 on error, 1 on success.
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old_priv_encode() MUST the return same kind of values as
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i2d_PrivateKey().
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They're called by L<d2i_PrivateKey(3)> and L<i2d_PrivateKey(3)>.
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int (*item_verify) (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
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X509_ALGOR *a, ASN1_BIT_STRING *sig, EVP_PKEY *pkey);
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int (*item_sign) (EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
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X509_ALGOR *alg1, X509_ALGOR *alg2,
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ASN1_BIT_STRING *sig);
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The item_sign() and item_verify() methods make it possible to have
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algorithm specific signatures and verification of them.
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item_sign() MUST return one of:
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=over 4
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=item <=0
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error
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=item Z<>1
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item_sign() did everything, OpenSSL internals just needs to pass the
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signature length back.
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=item Z<>2
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item_sign() did nothing, OpenSSL internal standard routines are
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expected to continue with the default signature production.
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=item Z<>3
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item_sign() set the algorithm identifier B<algor1> and B<algor2>,
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OpenSSL internals should just sign using those algorithms.
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=back
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item_verify() MUST return one of:
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=over 4
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=item <=0
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error
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=item Z<>1
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item_sign() did everything, OpenSSL internals just needs to pass the
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signature length back.
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=item Z<>2
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item_sign() did nothing, OpenSSL internal standard routines are
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expected to continue with the default signature production.
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=back
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item_verify() and item_sign() are called by L<ASN1_item_verify(3)> and
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L<ASN1_item_sign(3)>, and by extension, L<X509_verify(3)>,
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L<X509_REQ_verify(3)>, L<X509_sign(3)>, L<X509_REQ_sign(3)>, ...
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int (*siginf_set) (X509_SIG_INFO *siginf, const X509_ALGOR *alg,
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const ASN1_STRING *sig);
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The siginf_set() method is used to set custom B<X509_SIG_INFO>
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parameters.
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It MUST return 0 on error, or 1 on success.
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It's called as part of L<X509_check_purpose(3)>, L<X509_check_ca(3)>
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and L<X509_check_issued(3)>.
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int (*pkey_check) (const EVP_PKEY *pk);
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int (*pkey_public_check) (const EVP_PKEY *pk);
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int (*pkey_param_check) (const EVP_PKEY *pk);
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The pkey_check(), pkey_public_check() and pkey_param_check() methods are used
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to check the validity of B<pk> for key-pair, public component and parameters,
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respectively.
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They MUST return 0 for an invalid key, or 1 for a valid key.
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They are called by L<EVP_PKEY_check(3)>, L<EVP_PKEY_public_check(3)> and
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L<EVP_PKEY_param_check(3)> respectively.
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int (*set_priv_key) (EVP_PKEY *pk, const unsigned char *priv, size_t len);
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int (*set_pub_key) (EVP_PKEY *pk, const unsigned char *pub, size_t len);
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The set_priv_key() and set_pub_key() methods are used to set the raw private and
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public key data for an EVP_PKEY. They MUST return 0 on error, or 1 on success.
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They are called by L<EVP_PKEY_new_raw_private_key(3)>, and
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L<EVP_PKEY_new_raw_public_key(3)> respectively.
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size_t (*dirty) (const EVP_PKEY *pk);
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void *(*export_to) (const EVP_PKEY *pk, EVP_KEYMGMT *keymgmt);
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dirty_cnt() returns the internal key's dirty count.
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This can be used to synchronise different copies of the same keys.
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The export_to() method exports the key material from the given key to
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a provider, through the L<EVP_KEYMGMT(3)> interface, if that provider
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supports importing key material.
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=head2 Functions
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EVP_PKEY_asn1_new() creates and returns a new B<EVP_PKEY_ASN1_METHOD>
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object, and associates the given B<id>, B<flags>, B<pem_str> and
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B<info>.
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B<id> is a NID, B<pem_str> is the PEM type string, B<info> is a
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descriptive string.
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The following B<flags> are supported:
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ASN1_PKEY_SIGPARAM_NULL
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If B<ASN1_PKEY_SIGPARAM_NULL> is set, then the signature algorithm
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parameters are given the type B<V_ASN1_NULL> by default, otherwise
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they will be given the type B<V_ASN1_UNDEF> (i.e. the parameter is
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omitted).
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See L<X509_ALGOR_set0(3)> for more information.
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EVP_PKEY_asn1_copy() copies an B<EVP_PKEY_ASN1_METHOD> object from
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B<src> to B<dst>.
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This function is not thread safe, it's recommended to only use this
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when initializing the application.
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EVP_PKEY_asn1_free() frees an existing B<EVP_PKEY_ASN1_METHOD> pointed
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by B<ameth>.
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EVP_PKEY_asn1_add0() adds B<ameth> to the user defined stack of
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methods unless another B<EVP_PKEY_ASN1_METHOD> with the same NID is
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already there.
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This function is not thread safe, it's recommended to only use this
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when initializing the application.
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EVP_PKEY_asn1_add_alias() creates an alias with the NID B<to> for the
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B<EVP_PKEY_ASN1_METHOD> with NID B<from> unless another
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B<EVP_PKEY_ASN1_METHOD> with the same NID is already added.
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This function is not thread safe, it's recommended to only use this
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when initializing the application.
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EVP_PKEY_asn1_set_public(), EVP_PKEY_asn1_set_private(),
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EVP_PKEY_asn1_set_param(), EVP_PKEY_asn1_set_free(),
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EVP_PKEY_asn1_set_ctrl(), EVP_PKEY_asn1_set_item(),
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EVP_PKEY_asn1_set_siginf(), EVP_PKEY_asn1_set_check(),
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EVP_PKEY_asn1_set_public_check(), EVP_PKEY_asn1_set_param_check(),
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EVP_PKEY_asn1_set_security_bits(), EVP_PKEY_asn1_set_set_priv_key(),
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EVP_PKEY_asn1_set_set_pub_key(), EVP_PKEY_asn1_set_get_priv_key() and
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EVP_PKEY_asn1_set_get_pub_key() set the diverse methods of the given
|
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B<EVP_PKEY_ASN1_METHOD> object.
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EVP_PKEY_get0_asn1() finds the B<EVP_PKEY_ASN1_METHOD> associated
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with the key B<pkey>.
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=head1 RETURN VALUES
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EVP_PKEY_asn1_new() returns NULL on error, or a pointer to an
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B<EVP_PKEY_ASN1_METHOD> object otherwise.
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|
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EVP_PKEY_asn1_add0() and EVP_PKEY_asn1_add_alias() return 0 on error,
|
|
or 1 on success.
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|
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EVP_PKEY_get0_asn1() returns NULL on error, or a pointer to a constant
|
|
B<EVP_PKEY_ASN1_METHOD> object otherwise.
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|
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=head1 COPYRIGHT
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|
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|
Copyright 2017-2020 The OpenSSL Project Authors. All Rights Reserved.
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|
|
|
Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
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=cut
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