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