[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/buffer.h>
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| 13 | #include <openssl/objects.h>
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| 14 | #include <openssl/evp.h>
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| 15 | #include <openssl/x509.h>
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| 16 | #include <openssl/pkcs12.h>
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| 17 | #include <openssl/pem.h>
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| 18 | #include <openssl/engine.h>
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| 19 | #include <openssl/dh.h>
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| 20 | #include "internal/asn1_int.h"
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| 21 | #include "internal/evp_int.h"
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| 22 |
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| 23 | int pem_check_suffix(const char *pem_str, const char *suffix);
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| 24 |
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| 25 | EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
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| 26 | void *u)
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| 27 | {
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| 28 | char *nm = NULL;
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| 29 | const unsigned char *p = NULL;
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| 30 | unsigned char *data = NULL;
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| 31 | long len;
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| 32 | int slen;
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| 33 | EVP_PKEY *ret = NULL;
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| 34 |
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| 35 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
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| 36 | return NULL;
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| 37 | p = data;
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| 38 |
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| 39 | if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
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| 40 | PKCS8_PRIV_KEY_INFO *p8inf;
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| 41 | p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
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| 42 | if (!p8inf)
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| 43 | goto p8err;
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| 44 | ret = EVP_PKCS82PKEY(p8inf);
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| 45 | if (x) {
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| 46 | EVP_PKEY_free((EVP_PKEY *)*x);
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| 47 | *x = ret;
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| 48 | }
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| 49 | PKCS8_PRIV_KEY_INFO_free(p8inf);
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| 50 | } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
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| 51 | PKCS8_PRIV_KEY_INFO *p8inf;
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| 52 | X509_SIG *p8;
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| 53 | int klen;
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| 54 | char psbuf[PEM_BUFSIZE];
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| 55 | p8 = d2i_X509_SIG(NULL, &p, len);
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| 56 | if (!p8)
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| 57 | goto p8err;
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| 58 | if (cb)
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| 59 | klen = cb(psbuf, PEM_BUFSIZE, 0, u);
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| 60 | else
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| 61 | klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
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| 62 | if (klen <= 0) {
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| 63 | PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
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| 64 | X509_SIG_free(p8);
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| 65 | goto err;
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| 66 | }
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| 67 | p8inf = PKCS8_decrypt(p8, psbuf, klen);
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| 68 | X509_SIG_free(p8);
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| 69 | if (!p8inf)
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| 70 | goto p8err;
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| 71 | ret = EVP_PKCS82PKEY(p8inf);
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| 72 | if (x) {
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| 73 | EVP_PKEY_free((EVP_PKEY *)*x);
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| 74 | *x = ret;
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| 75 | }
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| 76 | PKCS8_PRIV_KEY_INFO_free(p8inf);
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| 77 | } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
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| 78 | const EVP_PKEY_ASN1_METHOD *ameth;
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| 79 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
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| 80 | if (!ameth || !ameth->old_priv_decode)
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| 81 | goto p8err;
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| 82 | ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
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| 83 | }
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| 84 | p8err:
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| 85 | if (ret == NULL)
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| 86 | PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
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| 87 | err:
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| 88 | OPENSSL_free(nm);
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| 89 | OPENSSL_clear_free(data, len);
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| 90 | return (ret);
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| 91 | }
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| 92 |
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| 93 | int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
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| 94 | unsigned char *kstr, int klen,
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| 95 | pem_password_cb *cb, void *u)
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| 96 | {
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| 97 | if (x->ameth == NULL || x->ameth->priv_encode != NULL)
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| 98 | return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
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| 99 | (char *)kstr, klen, cb, u);
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| 100 | return PEM_write_bio_PrivateKey_traditional(bp, x, enc, kstr, klen, cb, u);
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| 101 | }
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| 102 |
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| 103 | int PEM_write_bio_PrivateKey_traditional(BIO *bp, EVP_PKEY *x,
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| 104 | const EVP_CIPHER *enc,
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| 105 | unsigned char *kstr, int klen,
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| 106 | pem_password_cb *cb, void *u)
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| 107 | {
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| 108 | char pem_str[80];
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| 109 | BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
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| 110 | return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
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| 111 | pem_str, bp, x, enc, kstr, klen, cb, u);
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| 112 | }
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| 113 |
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| 114 | EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
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| 115 | {
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| 116 | char *nm = NULL;
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| 117 | const unsigned char *p = NULL;
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| 118 | unsigned char *data = NULL;
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| 119 | long len;
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| 120 | int slen;
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| 121 | EVP_PKEY *ret = NULL;
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| 122 |
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| 123 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
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| 124 | bp, 0, NULL))
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| 125 | return NULL;
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| 126 | p = data;
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| 127 |
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| 128 | if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
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| 129 | ret = EVP_PKEY_new();
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| 130 | if (ret == NULL)
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| 131 | goto err;
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| 132 | if (!EVP_PKEY_set_type_str(ret, nm, slen)
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| 133 | || !ret->ameth->param_decode
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| 134 | || !ret->ameth->param_decode(ret, &p, len)) {
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| 135 | EVP_PKEY_free(ret);
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| 136 | ret = NULL;
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| 137 | goto err;
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| 138 | }
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| 139 | if (x) {
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| 140 | EVP_PKEY_free((EVP_PKEY *)*x);
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| 141 | *x = ret;
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| 142 | }
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| 143 | }
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| 144 | err:
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| 145 | if (ret == NULL)
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| 146 | PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
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| 147 | OPENSSL_free(nm);
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| 148 | OPENSSL_free(data);
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| 149 | return (ret);
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| 150 | }
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| 151 |
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| 152 | int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
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| 153 | {
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| 154 | char pem_str[80];
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| 155 | if (!x->ameth || !x->ameth->param_encode)
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| 156 | return 0;
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| 157 |
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| 158 | BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
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| 159 | return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
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| 160 | pem_str, bp, x, NULL, NULL, 0, 0, NULL);
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| 161 | }
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| 162 |
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| 163 | #ifndef OPENSSL_NO_STDIO
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| 164 | EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
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| 165 | void *u)
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| 166 | {
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| 167 | BIO *b;
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| 168 | EVP_PKEY *ret;
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| 169 |
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| 170 | if ((b = BIO_new(BIO_s_file())) == NULL) {
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| 171 | PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
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| 172 | return (0);
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| 173 | }
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| 174 | BIO_set_fp(b, fp, BIO_NOCLOSE);
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| 175 | ret = PEM_read_bio_PrivateKey(b, x, cb, u);
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| 176 | BIO_free(b);
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| 177 | return (ret);
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| 178 | }
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| 179 |
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| 180 | int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
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| 181 | unsigned char *kstr, int klen,
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| 182 | pem_password_cb *cb, void *u)
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| 183 | {
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| 184 | BIO *b;
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| 185 | int ret;
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| 186 |
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| 187 | if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
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| 188 | PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
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| 189 | return 0;
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| 190 | }
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| 191 | ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
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| 192 | BIO_free(b);
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| 193 | return ret;
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| 194 | }
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| 195 |
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| 196 | #endif
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| 197 |
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| 198 | #ifndef OPENSSL_NO_DH
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| 199 |
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| 200 | /* Transparently read in PKCS#3 or X9.42 DH parameters */
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| 201 |
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| 202 | DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
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| 203 | {
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| 204 | char *nm = NULL;
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| 205 | const unsigned char *p = NULL;
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| 206 | unsigned char *data = NULL;
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| 207 | long len;
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| 208 | DH *ret = NULL;
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| 209 |
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| 210 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
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| 211 | return NULL;
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| 212 | p = data;
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| 213 |
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| 214 | if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0)
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| 215 | ret = d2i_DHxparams(x, &p, len);
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| 216 | else
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| 217 | ret = d2i_DHparams(x, &p, len);
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| 218 |
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| 219 | if (ret == NULL)
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| 220 | PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
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| 221 | OPENSSL_free(nm);
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| 222 | OPENSSL_free(data);
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| 223 | return ret;
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| 224 | }
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| 225 |
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| 226 | # ifndef OPENSSL_NO_STDIO
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| 227 | DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
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| 228 | {
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| 229 | BIO *b;
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| 230 | DH *ret;
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| 231 |
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| 232 | if ((b = BIO_new(BIO_s_file())) == NULL) {
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| 233 | PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
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| 234 | return (0);
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| 235 | }
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| 236 | BIO_set_fp(b, fp, BIO_NOCLOSE);
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| 237 | ret = PEM_read_bio_DHparams(b, x, cb, u);
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| 238 | BIO_free(b);
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| 239 | return (ret);
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| 240 | }
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| 241 | # endif
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| 242 |
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| 243 | #endif
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