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https://github.com/openssl/openssl.git
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274 lines
8.9 KiB
C
274 lines
8.9 KiB
C
/*
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* Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/core_dispatch.h>
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#include <openssl/buffer.h>
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#include <openssl/objects.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/pkcs12.h>
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#include <openssl/pem.h>
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#include <openssl/encoder.h>
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static int do_pk8pkey(BIO *bp, const EVP_PKEY *x, int isder,
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int nid, const EVP_CIPHER *enc,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u,
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const char *propq);
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#ifndef OPENSSL_NO_STDIO
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static int do_pk8pkey_fp(FILE *bp, const EVP_PKEY *x, int isder,
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int nid, const EVP_CIPHER *enc,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u,
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const char *propq);
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#endif
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/*
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* These functions write a private key in PKCS#8 format: it is a "drop in"
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* replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
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* is NULL then it uses the unencrypted private key form. The 'nid' versions
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* uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
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*/
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int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, const EVP_PKEY *x, int nid,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u, NULL);
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}
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int PEM_write_bio_PKCS8PrivateKey(BIO *bp, const EVP_PKEY *x, const EVP_CIPHER *enc,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u, NULL);
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}
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int i2d_PKCS8PrivateKey_bio(BIO *bp, const EVP_PKEY *x, const EVP_CIPHER *enc,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u, NULL);
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}
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int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, const EVP_PKEY *x, int nid,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u, NULL);
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}
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static int do_pk8pkey(BIO *bp, const EVP_PKEY *x, int isder, int nid,
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const EVP_CIPHER *enc, const char *kstr, int klen,
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pem_password_cb *cb, void *u, const char *propq)
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{
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int ret = 0;
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const char *outtype = isder ? "DER" : "PEM";
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OSSL_ENCODER_CTX *ctx =
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OSSL_ENCODER_CTX_new_for_pkey(x, OSSL_KEYMGMT_SELECT_ALL,
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outtype, "PrivateKeyInfo", propq);
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if (ctx == NULL)
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return 0;
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/*
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* If no keystring or callback is set, OpenSSL traditionally uses the
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* user's cb argument as a password string, or if that's NULL, it falls
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* back on PEM_def_callback().
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*/
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if (kstr == NULL && cb == NULL) {
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if (u != NULL) {
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kstr = u;
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klen = strlen(u);
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} else {
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cb = PEM_def_callback;
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}
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}
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/*
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* NOTE: There is no attempt to do a EVP_CIPHER_fetch() using the nid,
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* since the nid is a PBE algorithm which can't be fetched currently.
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* (e.g. NID_pbe_WithSHA1And2_Key_TripleDES_CBC). Just use the legacy
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* path if the NID is passed.
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*/
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if (nid == -1 && OSSL_ENCODER_CTX_get_num_encoders(ctx) != 0) {
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ret = 1;
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if (enc != NULL) {
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ret = 0;
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if (OSSL_ENCODER_CTX_set_cipher(ctx, EVP_CIPHER_get0_name(enc),
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NULL)) {
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const unsigned char *ukstr = (const unsigned char *)kstr;
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/*
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* Try to pass the passphrase if one was given, or the
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* passphrase callback if one was given. If none of them
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* are given and that's wrong, we rely on the _to_bio()
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* call to generate errors.
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*/
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ret = 1;
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if (kstr != NULL
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&& !OSSL_ENCODER_CTX_set_passphrase(ctx, ukstr, klen))
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ret = 0;
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else if (cb != NULL
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&& !OSSL_ENCODER_CTX_set_pem_password_cb(ctx, cb, u))
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ret = 0;
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}
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}
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ret = ret && OSSL_ENCODER_to_bio(ctx, bp);
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} else {
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X509_SIG *p8;
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PKCS8_PRIV_KEY_INFO *p8inf;
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char buf[PEM_BUFSIZE];
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ret = 0;
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if ((p8inf = EVP_PKEY2PKCS8(x)) == NULL) {
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ERR_raise(ERR_LIB_PEM, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
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goto legacy_end;
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}
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if (enc || (nid != -1)) {
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if (kstr == NULL) {
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klen = cb(buf, PEM_BUFSIZE, 1, u);
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if (klen < 0) {
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ERR_raise(ERR_LIB_PEM, PEM_R_READ_KEY);
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goto legacy_end;
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}
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kstr = buf;
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}
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p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
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if (kstr == buf)
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OPENSSL_cleanse(buf, klen);
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if (p8 == NULL)
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goto legacy_end;
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if (isder)
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ret = i2d_PKCS8_bio(bp, p8);
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else
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ret = PEM_write_bio_PKCS8(bp, p8);
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X509_SIG_free(p8);
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} else {
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if (isder)
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ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
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else
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ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
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}
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legacy_end:
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PKCS8_PRIV_KEY_INFO_free(p8inf);
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}
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OSSL_ENCODER_CTX_free(ctx);
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return ret;
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}
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EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
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void *u)
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{
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PKCS8_PRIV_KEY_INFO *p8inf = NULL;
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X509_SIG *p8 = NULL;
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int klen;
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EVP_PKEY *ret;
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char psbuf[PEM_BUFSIZE];
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p8 = d2i_PKCS8_bio(bp, NULL);
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if (p8 == NULL)
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return NULL;
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if (cb != NULL)
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klen = cb(psbuf, PEM_BUFSIZE, 0, u);
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else
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klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
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if (klen < 0) {
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ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ);
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X509_SIG_free(p8);
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return NULL;
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}
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p8inf = PKCS8_decrypt(p8, psbuf, klen);
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X509_SIG_free(p8);
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OPENSSL_cleanse(psbuf, klen);
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if (p8inf == NULL)
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return NULL;
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ret = EVP_PKCS82PKEY(p8inf);
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PKCS8_PRIV_KEY_INFO_free(p8inf);
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if (!ret)
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return NULL;
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if (x != NULL) {
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EVP_PKEY_free(*x);
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*x = ret;
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}
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return ret;
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}
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#ifndef OPENSSL_NO_STDIO
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int i2d_PKCS8PrivateKey_fp(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u, NULL);
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}
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int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, const EVP_PKEY *x, int nid,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u, NULL);
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}
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int PEM_write_PKCS8PrivateKey_nid(FILE *fp, const EVP_PKEY *x, int nid,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u, NULL);
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}
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int PEM_write_PKCS8PrivateKey(FILE *fp, const EVP_PKEY *x, const EVP_CIPHER *enc,
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const char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u, NULL);
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}
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static int do_pk8pkey_fp(FILE *fp, const EVP_PKEY *x, int isder, int nid,
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const EVP_CIPHER *enc, const char *kstr, int klen,
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pem_password_cb *cb, void *u, const char *propq)
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{
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BIO *bp;
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int ret;
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if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
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ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
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return 0;
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}
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ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u, propq);
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BIO_free(bp);
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return ret;
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}
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EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
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void *u)
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{
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BIO *bp;
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EVP_PKEY *ret;
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if ((bp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
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ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB);
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return NULL;
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}
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ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
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BIO_free(bp);
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return ret;
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}
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#endif
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IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)
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IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,
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PKCS8_PRIV_KEY_INFO)
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