yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use |
| 5 | * this file except in compliance with the License. You can obtain a copy |
| 6 | * in the file LICENSE in the source distribution or at |
| 7 | * https://www.openssl.org/source/license.html |
| 8 | */ |
| 9 | |
| 10 | #include <stdio.h> |
| 11 | #include "internal/cryptlib.h" |
| 12 | #include <openssl/buffer.h> |
| 13 | #include <openssl/objects.h> |
| 14 | #include <openssl/evp.h> |
| 15 | #include <openssl/x509.h> |
| 16 | #include <openssl/pkcs12.h> |
| 17 | #include <openssl/pem.h> |
| 18 | #include <openssl/engine.h> |
| 19 | #include <openssl/dh.h> |
| 20 | #include "crypto/asn1.h" |
| 21 | #include "crypto/evp.h" |
| 22 | |
| 23 | int pem_check_suffix(const char *pem_str, const char *suffix); |
| 24 | |
| 25 | EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, |
| 26 | void *u) |
| 27 | { |
| 28 | char *nm = NULL; |
| 29 | const unsigned char *p = NULL; |
| 30 | unsigned char *data = NULL; |
| 31 | long len; |
| 32 | int slen; |
| 33 | EVP_PKEY *ret = NULL; |
| 34 | |
| 35 | if (!PEM_bytes_read_bio_secmem(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, |
| 36 | cb, u)) |
| 37 | return NULL; |
| 38 | p = data; |
| 39 | |
| 40 | if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) { |
| 41 | PKCS8_PRIV_KEY_INFO *p8inf; |
| 42 | p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len); |
| 43 | if (!p8inf) |
| 44 | goto p8err; |
| 45 | ret = EVP_PKCS82PKEY(p8inf); |
| 46 | if (x) { |
| 47 | EVP_PKEY_free((EVP_PKEY *)*x); |
| 48 | *x = ret; |
| 49 | } |
| 50 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
| 51 | } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) { |
| 52 | PKCS8_PRIV_KEY_INFO *p8inf; |
| 53 | X509_SIG *p8; |
| 54 | int klen; |
| 55 | char psbuf[PEM_BUFSIZE]; |
| 56 | p8 = d2i_X509_SIG(NULL, &p, len); |
| 57 | if (!p8) |
| 58 | goto p8err; |
| 59 | if (cb) |
| 60 | klen = cb(psbuf, PEM_BUFSIZE, 0, u); |
| 61 | else |
| 62 | klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u); |
| 63 | if (klen < 0) { |
| 64 | PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ); |
| 65 | X509_SIG_free(p8); |
| 66 | goto err; |
| 67 | } |
| 68 | p8inf = PKCS8_decrypt(p8, psbuf, klen); |
| 69 | X509_SIG_free(p8); |
| 70 | OPENSSL_cleanse(psbuf, klen); |
| 71 | if (!p8inf) |
| 72 | goto p8err; |
| 73 | ret = EVP_PKCS82PKEY(p8inf); |
| 74 | if (x) { |
| 75 | EVP_PKEY_free((EVP_PKEY *)*x); |
| 76 | *x = ret; |
| 77 | } |
| 78 | PKCS8_PRIV_KEY_INFO_free(p8inf); |
| 79 | } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) { |
| 80 | const EVP_PKEY_ASN1_METHOD *ameth; |
| 81 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); |
| 82 | if (!ameth || !ameth->old_priv_decode) |
| 83 | goto p8err; |
| 84 | ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len); |
| 85 | } |
| 86 | p8err: |
| 87 | if (ret == NULL) |
| 88 | PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB); |
| 89 | err: |
| 90 | OPENSSL_secure_free(nm); |
| 91 | OPENSSL_secure_clear_free(data, len); |
| 92 | return ret; |
| 93 | } |
| 94 | |
| 95 | int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc, |
| 96 | unsigned char *kstr, int klen, |
| 97 | pem_password_cb *cb, void *u) |
| 98 | { |
| 99 | if (x->ameth == NULL || x->ameth->priv_encode != NULL) |
| 100 | return PEM_write_bio_PKCS8PrivateKey(bp, x, enc, |
| 101 | (char *)kstr, klen, cb, u); |
| 102 | return PEM_write_bio_PrivateKey_traditional(bp, x, enc, kstr, klen, cb, u); |
| 103 | } |
| 104 | |
| 105 | int PEM_write_bio_PrivateKey_traditional(BIO *bp, EVP_PKEY *x, |
| 106 | const EVP_CIPHER *enc, |
| 107 | unsigned char *kstr, int klen, |
| 108 | pem_password_cb *cb, void *u) |
| 109 | { |
| 110 | char pem_str[80]; |
| 111 | |
| 112 | if (x->ameth == NULL || x->ameth->old_priv_encode == NULL) { |
| 113 | PEMerr(PEM_F_PEM_WRITE_BIO_PRIVATEKEY_TRADITIONAL, |
| 114 | PEM_R_UNSUPPORTED_PUBLIC_KEY_TYPE); |
| 115 | return 0; |
| 116 | } |
| 117 | BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str); |
| 118 | return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey, |
| 119 | pem_str, bp, x, enc, kstr, klen, cb, u); |
| 120 | } |
| 121 | |
| 122 | EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x) |
| 123 | { |
| 124 | char *nm = NULL; |
| 125 | const unsigned char *p = NULL; |
| 126 | unsigned char *data = NULL; |
| 127 | long len; |
| 128 | int slen; |
| 129 | EVP_PKEY *ret = NULL; |
| 130 | |
| 131 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS, |
| 132 | bp, 0, NULL)) |
| 133 | return NULL; |
| 134 | p = data; |
| 135 | |
| 136 | if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) { |
| 137 | ret = EVP_PKEY_new(); |
| 138 | if (ret == NULL) |
| 139 | goto err; |
| 140 | if (!EVP_PKEY_set_type_str(ret, nm, slen) |
| 141 | || !ret->ameth->param_decode |
| 142 | || !ret->ameth->param_decode(ret, &p, len)) { |
| 143 | EVP_PKEY_free(ret); |
| 144 | ret = NULL; |
| 145 | goto err; |
| 146 | } |
| 147 | if (x) { |
| 148 | EVP_PKEY_free((EVP_PKEY *)*x); |
| 149 | *x = ret; |
| 150 | } |
| 151 | } |
| 152 | err: |
| 153 | if (ret == NULL) |
| 154 | PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB); |
| 155 | OPENSSL_free(nm); |
| 156 | OPENSSL_free(data); |
| 157 | return ret; |
| 158 | } |
| 159 | |
| 160 | int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x) |
| 161 | { |
| 162 | char pem_str[80]; |
| 163 | if (!x->ameth || !x->ameth->param_encode) |
| 164 | return 0; |
| 165 | |
| 166 | BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str); |
| 167 | return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode, |
| 168 | pem_str, bp, x, NULL, NULL, 0, 0, NULL); |
| 169 | } |
| 170 | |
| 171 | #ifndef OPENSSL_NO_STDIO |
| 172 | EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, |
| 173 | void *u) |
| 174 | { |
| 175 | BIO *b; |
| 176 | EVP_PKEY *ret; |
| 177 | |
| 178 | if ((b = BIO_new(BIO_s_file())) == NULL) { |
| 179 | PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB); |
| 180 | return 0; |
| 181 | } |
| 182 | BIO_set_fp(b, fp, BIO_NOCLOSE); |
| 183 | ret = PEM_read_bio_PrivateKey(b, x, cb, u); |
| 184 | BIO_free(b); |
| 185 | return ret; |
| 186 | } |
| 187 | |
| 188 | int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc, |
| 189 | unsigned char *kstr, int klen, |
| 190 | pem_password_cb *cb, void *u) |
| 191 | { |
| 192 | BIO *b; |
| 193 | int ret; |
| 194 | |
| 195 | if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) { |
| 196 | PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB); |
| 197 | return 0; |
| 198 | } |
| 199 | ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u); |
| 200 | BIO_free(b); |
| 201 | return ret; |
| 202 | } |
| 203 | |
| 204 | #endif |
| 205 | |
| 206 | #ifndef OPENSSL_NO_DH |
| 207 | |
| 208 | /* Transparently read in PKCS#3 or X9.42 DH parameters */ |
| 209 | |
| 210 | DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u) |
| 211 | { |
| 212 | char *nm = NULL; |
| 213 | const unsigned char *p = NULL; |
| 214 | unsigned char *data = NULL; |
| 215 | long len; |
| 216 | DH *ret = NULL; |
| 217 | |
| 218 | if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u)) |
| 219 | return NULL; |
| 220 | p = data; |
| 221 | |
| 222 | if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0) |
| 223 | ret = d2i_DHxparams(x, &p, len); |
| 224 | else |
| 225 | ret = d2i_DHparams(x, &p, len); |
| 226 | |
| 227 | if (ret == NULL) |
| 228 | PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB); |
| 229 | OPENSSL_free(nm); |
| 230 | OPENSSL_free(data); |
| 231 | return ret; |
| 232 | } |
| 233 | |
| 234 | # ifndef OPENSSL_NO_STDIO |
| 235 | DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u) |
| 236 | { |
| 237 | BIO *b; |
| 238 | DH *ret; |
| 239 | |
| 240 | if ((b = BIO_new(BIO_s_file())) == NULL) { |
| 241 | PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB); |
| 242 | return 0; |
| 243 | } |
| 244 | BIO_set_fp(b, fp, BIO_NOCLOSE); |
| 245 | ret = PEM_read_bio_DHparams(b, x, cb, u); |
| 246 | BIO_free(b); |
| 247 | return ret; |
| 248 | } |
| 249 | # endif |
| 250 | |
| 251 | #endif |