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/*
* Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* 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
* https://www.openssl.org/source/license.html
*/
#include <openssl/core_dispatch.h>
#include <openssl/pem.h>
#include <openssl/encoder.h>
/*
* Selectors, named according to the ASN.1 names used throughout libcrypto.
*
* Note that these are not absolutely mandatory, they are rather a wishlist
* of sorts. The provider implementations are free to make choices that
* make sense for them, based on these selectors.
* For example, the EC backend is likely to really just output the private
* key to a PKCS#8 structure, even thought PEM_SELECTION_PrivateKey specifies
* the public key as well. This is fine, as long as the corresponding
* decoding operation can return an object that contains what libcrypto
* expects.
*/
# define PEM_SELECTION_PUBKEY EVP_PKEY_PUBLIC_KEY
# define PEM_SELECTION_PrivateKey EVP_PKEY_KEYPAIR
# define PEM_SELECTION_Parameters EVP_PKEY_KEY_PARAMETERS
/*
* Properties, named according to the ASN.1 names used throughout libcrypto.
*/
# define PEM_STRUCTURE_PUBKEY "SubjectPublicKeyInfo"
# define PEM_STRUCTURE_PrivateKey "PrivateKeyInfo"
# define PEM_STRUCTURE_Parameters "type-specific"
# define PEM_STRUCTURE_RSAPrivateKey "type-specific"
# define PEM_STRUCTURE_RSAPublicKey "type-specific"
/* Alternative IMPLEMENT macros for provided encoders */
# define IMPLEMENT_PEM_provided_write_body_vars(type, asn1, pq) \
int ret = 0; \
OSSL_ENCODER_CTX *ctx = \
OSSL_ENCODER_CTX_new_for_##type(x, PEM_SELECTION_##asn1, \
"PEM", PEM_STRUCTURE_##asn1, \
(pq)); \
\
if (OSSL_ENCODER_CTX_get_num_encoders(ctx) == 0) { \
OSSL_ENCODER_CTX_free(ctx); \
goto legacy; \
}
# define IMPLEMENT_PEM_provided_write_body_pass() \
ret = 1; \
if (kstr == NULL && cb == NULL) { \
if (u != NULL) { \
kstr = u; \
klen = strlen(u); \
} else { \
cb = PEM_def_callback; \
} \
} \
if (enc != NULL) { \
ret = 0; \
if (OSSL_ENCODER_CTX_set_cipher(ctx, EVP_CIPHER_get0_name(enc), \
NULL)) { \
ret = 1; \
if (kstr != NULL \
&& !OSSL_ENCODER_CTX_set_passphrase(ctx, kstr, klen)) \
ret = 0; \
else if (cb != NULL \
&& !OSSL_ENCODER_CTX_set_pem_password_cb(ctx, \
cb, u)) \
ret = 0; \
} \
} \
if (!ret) { \
OSSL_ENCODER_CTX_free(ctx); \
return 0; \
}
# define IMPLEMENT_PEM_provided_write_body_main(type, outtype) \
ret = OSSL_ENCODER_to_##outtype(ctx, out); \
OSSL_ENCODER_CTX_free(ctx); \
return ret
# define IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
writename) \
legacy: \
return PEM_ASN1_##writename((i2d_of_void *)i2d_##asn1, str, out, \
x, NULL, NULL, 0, NULL, NULL)
# define IMPLEMENT_PEM_provided_write_body_fallback_cb(str, asn1, \
writename) \
legacy: \
return PEM_ASN1_##writename##((i2d_of_void *)i2d_##asn1, str, out, \
x, enc, kstr, klen, cb, u)
# define IMPLEMENT_PEM_provided_write_to(name, TYPE, type, str, asn1, \
OUTTYPE, outtype, writename) \
PEM_write_fnsig(name, TYPE, OUTTYPE, writename) \
{ \
IMPLEMENT_PEM_provided_write_body_vars(type, asn1, NULL); \
IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
writename); \
} \
PEM_write_ex_fnsig(name, TYPE, OUTTYPE, writename) \
{ \
IMPLEMENT_PEM_provided_write_body_vars(type, asn1, propq); \
IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
writename); \
}
# define IMPLEMENT_PEM_provided_write_cb_to(name, TYPE, type, str, asn1, \
OUTTYPE, outtype, writename) \
PEM_write_cb_fnsig(name, TYPE, OUTTYPE, writename) \
{ \
IMPLEMENT_PEM_provided_write_body_vars(type, asn1, NULL); \
IMPLEMENT_PEM_provided_write_body_pass(); \
IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
IMPLEMENT_PEM_provided_write_body_fallback_cb(str, asn1, \
writename); \
} \
PEM_write_ex_cb_fnsig(name, TYPE, OUTTYPE, writename) \
{ \
IMPLEMENT_PEM_provided_write_body_vars(type, asn1, propq); \
IMPLEMENT_PEM_provided_write_body_pass(); \
IMPLEMENT_PEM_provided_write_body_main(type, outtype); \
IMPLEMENT_PEM_provided_write_body_fallback(str, asn1, \
writename); \
}
# ifdef OPENSSL_NO_STDIO
# define IMPLEMENT_PEM_provided_write_fp(name, TYPE, type, str, asn1)
# define IMPLEMENT_PEM_provided_write_cb_fp(name, TYPE, type, str, asn1)
# else
# define IMPLEMENT_PEM_provided_write_fp(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_to(name, TYPE, type, str, asn1, FILE, fp, write)
# define IMPLEMENT_PEM_provided_write_cb_fp(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_cb_to(name, TYPE, type, str, asn1, FILE, fp, write)
# endif
# define IMPLEMENT_PEM_provided_write_bio(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_to(name, TYPE, type, str, asn1, BIO, bio, write_bio)
# define IMPLEMENT_PEM_provided_write_cb_bio(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_cb_to(name, TYPE, type, str, asn1, BIO, bio, write_bio)
# define IMPLEMENT_PEM_provided_write(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_bio(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_fp(name, TYPE, type, str, asn1)
# define IMPLEMENT_PEM_provided_write_cb(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_cb_bio(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_provided_write_cb_fp(name, TYPE, type, str, asn1)
# define IMPLEMENT_PEM_provided_rw(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_read(name, TYPE, str, asn1) \
IMPLEMENT_PEM_provided_write(name, TYPE, type, str, asn1)
# define IMPLEMENT_PEM_provided_rw_cb(name, TYPE, type, str, asn1) \
IMPLEMENT_PEM_read(name, TYPE, str, asn1) \
IMPLEMENT_PEM_provided_write_cb(name, TYPE, type, str, asn1)
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