252 lines
7.1 KiB
C
252 lines
7.1 KiB
C
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/*
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* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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/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/engine.h>
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#include <openssl/dh.h>
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#include "crypto/asn1.h"
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#include "crypto/evp.h"
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int pem_check_suffix(const char *pem_str, const char *suffix);
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EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
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void *u)
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{
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char *nm = NULL;
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const unsigned char *p = NULL;
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unsigned char *data = NULL;
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long len;
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int slen;
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EVP_PKEY *ret = NULL;
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if (!PEM_bytes_read_bio_secmem(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp,
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cb, u))
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return NULL;
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p = data;
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if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
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PKCS8_PRIV_KEY_INFO *p8inf;
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p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
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if (!p8inf)
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goto p8err;
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ret = EVP_PKCS82PKEY(p8inf);
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if (x) {
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EVP_PKEY_free((EVP_PKEY *)*x);
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*x = ret;
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}
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PKCS8_PRIV_KEY_INFO_free(p8inf);
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} else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
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PKCS8_PRIV_KEY_INFO *p8inf;
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X509_SIG *p8;
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int klen;
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char psbuf[PEM_BUFSIZE];
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p8 = d2i_X509_SIG(NULL, &p, len);
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if (!p8)
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goto p8err;
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if (cb)
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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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PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
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X509_SIG_free(p8);
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goto err;
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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)
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goto p8err;
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ret = EVP_PKCS82PKEY(p8inf);
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if (x) {
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EVP_PKEY_free((EVP_PKEY *)*x);
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*x = ret;
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}
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PKCS8_PRIV_KEY_INFO_free(p8inf);
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} else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
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const EVP_PKEY_ASN1_METHOD *ameth;
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ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
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if (!ameth || !ameth->old_priv_decode)
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goto p8err;
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ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
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}
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p8err:
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if (ret == NULL)
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PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
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err:
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OPENSSL_secure_free(nm);
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OPENSSL_secure_clear_free(data, len);
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return ret;
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}
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int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
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unsigned char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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if (x->ameth == NULL || x->ameth->priv_encode != NULL)
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return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
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(char *)kstr, klen, cb, u);
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return PEM_write_bio_PrivateKey_traditional(bp, x, enc, kstr, klen, cb, u);
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}
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int PEM_write_bio_PrivateKey_traditional(BIO *bp, EVP_PKEY *x,
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const EVP_CIPHER *enc,
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unsigned char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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char pem_str[80];
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if (x->ameth == NULL || x->ameth->old_priv_encode == NULL) {
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PEMerr(PEM_F_PEM_WRITE_BIO_PRIVATEKEY_TRADITIONAL,
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PEM_R_UNSUPPORTED_PUBLIC_KEY_TYPE);
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return 0;
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}
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BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
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return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
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pem_str, bp, x, enc, kstr, klen, cb, u);
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}
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EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
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{
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char *nm = NULL;
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const unsigned char *p = NULL;
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unsigned char *data = NULL;
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long len;
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int slen;
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EVP_PKEY *ret = NULL;
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if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
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bp, 0, NULL))
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return NULL;
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p = data;
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if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
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ret = EVP_PKEY_new();
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if (ret == NULL)
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goto err;
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if (!EVP_PKEY_set_type_str(ret, nm, slen)
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|| !ret->ameth->param_decode
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|| !ret->ameth->param_decode(ret, &p, len)) {
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EVP_PKEY_free(ret);
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ret = NULL;
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goto err;
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}
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if (x) {
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EVP_PKEY_free((EVP_PKEY *)*x);
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*x = ret;
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}
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}
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err:
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if (ret == NULL)
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PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
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OPENSSL_free(nm);
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OPENSSL_free(data);
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return ret;
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}
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int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
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{
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char pem_str[80];
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if (!x->ameth || !x->ameth->param_encode)
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return 0;
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BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
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return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
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pem_str, bp, x, NULL, NULL, 0, 0, NULL);
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}
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#ifndef OPENSSL_NO_STDIO
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EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
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void *u)
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{
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BIO *b;
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EVP_PKEY *ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
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return 0;
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = PEM_read_bio_PrivateKey(b, x, cb, u);
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BIO_free(b);
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return ret;
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}
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int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
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unsigned char *kstr, int klen,
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pem_password_cb *cb, void *u)
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{
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BIO *b;
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int ret;
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if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
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PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
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return 0;
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}
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ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
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BIO_free(b);
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return ret;
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}
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#endif
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#ifndef OPENSSL_NO_DH
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/* Transparently read in PKCS#3 or X9.42 DH parameters */
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DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
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{
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char *nm = NULL;
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const unsigned char *p = NULL;
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unsigned char *data = NULL;
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long len;
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DH *ret = NULL;
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if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
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return NULL;
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p = data;
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if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0)
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ret = d2i_DHxparams(x, &p, len);
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else
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ret = d2i_DHparams(x, &p, len);
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if (ret == NULL)
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PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
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OPENSSL_free(nm);
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OPENSSL_free(data);
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return ret;
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}
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# ifndef OPENSSL_NO_STDIO
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DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
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{
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BIO *b;
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DH *ret;
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if ((b = BIO_new(BIO_s_file())) == NULL) {
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PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
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return 0;
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}
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BIO_set_fp(b, fp, BIO_NOCLOSE);
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ret = PEM_read_bio_DHparams(b, x, cb, u);
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BIO_free(b);
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return ret;
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}
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# endif
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#endif
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