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cli/vendor/aws-lc-sys/aws-lc/crypto/pem/pem_info.c

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// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
// SPDX-License-Identifier: Apache-2.0
#include <openssl/pem.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <openssl/dsa.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/mem.h>
#include <openssl/obj.h>
#include <openssl/rsa.h>
#include <openssl/x509.h>
#include "internal.h"
static X509_PKEY *X509_PKEY_new(void) {
return OPENSSL_zalloc(sizeof(X509_PKEY));
}
static void X509_PKEY_free(X509_PKEY *x) {
if (x == NULL) {
return;
}
EVP_PKEY_free(x->dec_pkey);
OPENSSL_free(x);
}
static X509_INFO *X509_INFO_new(void) {
return OPENSSL_zalloc(sizeof(X509_INFO));
}
void X509_INFO_free(X509_INFO *x) {
if (x == NULL) {
return;
}
X509_free(x->x509);
X509_CRL_free(x->crl);
X509_PKEY_free(x->x_pkey);
OPENSSL_free(x->enc_data);
OPENSSL_free(x);
}
STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
pem_password_cb *cb, void *u) {
BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
if (b == NULL) {
OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
return 0;
}
STACK_OF(X509_INFO) *ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
BIO_free(b);
return ret;
}
enum parse_result_t {
parse_ok,
parse_error,
parse_new_entry,
};
static enum parse_result_t parse_x509(X509_INFO *info, const uint8_t *data,
size_t len, int key_type) {
if (info->x509 != NULL) {
return parse_new_entry;
}
info->x509 = d2i_X509(NULL, &data, len);
return info->x509 != NULL ? parse_ok : parse_error;
}
static enum parse_result_t parse_x509_aux(X509_INFO *info, const uint8_t *data,
size_t len, int key_type) {
if (info->x509 != NULL) {
return parse_new_entry;
}
info->x509 = d2i_X509_AUX(NULL, &data, len);
return info->x509 != NULL ? parse_ok : parse_error;
}
static enum parse_result_t parse_crl(X509_INFO *info, const uint8_t *data,
size_t len, int key_type) {
if (info->crl != NULL) {
return parse_new_entry;
}
info->crl = d2i_X509_CRL(NULL, &data, len);
return info->crl != NULL ? parse_ok : parse_error;
}
static enum parse_result_t parse_key(X509_INFO *info, const uint8_t *data,
size_t len, int key_type) {
if (info->x_pkey != NULL) {
return parse_new_entry;
}
info->x_pkey = X509_PKEY_new();
if (info->x_pkey == NULL) {
return parse_error;
}
info->x_pkey->dec_pkey = d2i_PrivateKey(key_type, NULL, &data, len);
return info->x_pkey->dec_pkey != NULL ? parse_ok : parse_error;
}
STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
pem_password_cb *cb, void *u) {
X509_INFO *info = NULL;
char *name = NULL, *header = NULL;
unsigned char *data = NULL;
long len;
int ok = 0;
STACK_OF(X509_INFO) *ret = NULL;
if (sk == NULL) {
ret = sk_X509_INFO_new_null();
if (ret == NULL) {
return NULL;
}
} else {
ret = sk;
}
size_t orig_num = sk_X509_INFO_num(ret);
info = X509_INFO_new();
if (info == NULL) {
goto err;
}
for (;;) {
if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
uint32_t error = ERR_peek_last_error();
if (ERR_GET_LIB(error) == ERR_LIB_PEM &&
ERR_GET_REASON(error) == PEM_R_NO_START_LINE) {
ERR_clear_error();
break;
}
goto err;
}
enum parse_result_t (*parse_function)(X509_INFO *, const uint8_t *, size_t,
int) = NULL;
int key_type = EVP_PKEY_NONE;
if (strcmp(name, PEM_STRING_X509) == 0 ||
strcmp(name, PEM_STRING_X509_OLD) == 0) {
parse_function = parse_x509;
} else if (strcmp(name, PEM_STRING_X509_TRUSTED) == 0) {
parse_function = parse_x509_aux;
} else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
parse_function = parse_crl;
} else if (strcmp(name, PEM_STRING_RSA) == 0) {
parse_function = parse_key;
key_type = EVP_PKEY_RSA;
} else if (strcmp(name, PEM_STRING_DSA) == 0) {
parse_function = parse_key;
key_type = EVP_PKEY_DSA;
} else if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
parse_function = parse_key;
key_type = EVP_PKEY_EC;
}
// If a private key has a header, assume it is encrypted.
if (key_type != EVP_PKEY_NONE && strlen(header) > 10) {
if (info->x_pkey != NULL) {
if (!sk_X509_INFO_push(ret, info)) {
goto err;
}
info = X509_INFO_new();
if (info == NULL) {
goto err;
}
}
// Historically, raw entries pushed an empty key.
info->x_pkey = X509_PKEY_new();
if (info->x_pkey == NULL ||
!PEM_get_EVP_CIPHER_INFO(header, &info->enc_cipher)) {
goto err;
}
info->enc_data = (char *)data;
info->enc_len = (int)len;
data = NULL;
} else if (parse_function != NULL) {
EVP_CIPHER_INFO cipher;
if (!PEM_get_EVP_CIPHER_INFO(header, &cipher) ||
!PEM_do_header(&cipher, data, &len, cb, u)) {
goto err;
}
enum parse_result_t result = parse_function(info, data, len, key_type);
if (result == parse_new_entry) {
if (!sk_X509_INFO_push(ret, info)) {
goto err;
}
info = X509_INFO_new();
if (info == NULL) {
goto err;
}
result = parse_function(info, data, len, key_type);
}
if (result != parse_ok) {
OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
goto err;
}
}
OPENSSL_free(name);
OPENSSL_free(header);
OPENSSL_free(data);
name = NULL;
header = NULL;
data = NULL;
}
// Push the last entry on the stack if not empty.
if (info->x509 != NULL || info->crl != NULL || info->x_pkey != NULL ||
info->enc_data != NULL) {
if (!sk_X509_INFO_push(ret, info)) {
goto err;
}
info = NULL;
}
ok = 1;
err:
X509_INFO_free(info);
if (!ok) {
while (sk_X509_INFO_num(ret) > orig_num) {
X509_INFO_free(sk_X509_INFO_pop(ret));
}
if (ret != sk) {
sk_X509_INFO_free(ret);
}
ret = NULL;
}
OPENSSL_free(name);
OPENSSL_free(header);
OPENSSL_free(data);
return ret;
}
// A TJH addition
int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
unsigned char *kstr, int klen, pem_password_cb *cb,
void *u) {
int i, ret = 0;
unsigned char *data = NULL;
const char *objstr = NULL;
char buf[PEM_BUFSIZE];
unsigned char *iv = NULL;
unsigned iv_len = 0;
if (enc != NULL) {
iv_len = EVP_CIPHER_iv_length(enc);
objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
if (objstr == NULL) {
OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
goto err;
}
}
if (xi == NULL) {
goto err;
}
// now for the fun part ... if we have a private key then we have to be
// able to handle a not-yet-decrypted key being written out correctly ...
// if it is decrypted or it is non-encrypted then we use the base code
if (xi->x_pkey != NULL) {
if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
if (enc == NULL) {
OPENSSL_PUT_ERROR(PEM, PEM_R_CIPHER_IS_NULL);
goto err;
}
// copy from weirdo names into more normal things
iv = xi->enc_cipher.iv;
data = (unsigned char *)xi->enc_data;
i = xi->enc_len;
// we take the encryption data from the internal stuff rather
// than what the user has passed us ... as we have to match
// exactly for some strange reason
objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
if (objstr == NULL) {
OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
goto err;
}
// Check if there is enough space for the header:
// - strlen(objstr) for the cipher name
// - 23 bytes for fixed PEM header components from |PEM_proc_type|
// - 2*iv_len as IV bytes are encoded in hex (each byte needs two characters)
// - 13 bytes for DEK-Info header formatting
assert(strlen(objstr) + 23 + 2 * iv_len + 13 <= sizeof buf);
buf[0] = '\0';
PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
PEM_dek_info(buf, objstr, iv_len, (char *)iv);
// use the normal code to write things out
i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
if (i <= 0) {
goto err;
}
} else if (xi->x_pkey->dec_pkey) {
// Add DSA/DH
// normal optionally encrypted stuff
if (PEM_write_bio_RSAPrivateKey(bp,
EVP_PKEY_get0_RSA(xi->x_pkey->dec_pkey),
enc, kstr, klen, cb, u) <= 0) {
goto err;
}
}
}
// if we have a certificate then write it out now
if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0)) {
goto err;
}
// we are ignoring anything else that is loaded into the X509_INFO
// structure for the moment ... as I don't need it so I'm not coding it
// here and Eric can do it when this makes it into the base library --tjh
ret = 1;
err:
OPENSSL_cleanse(buf, PEM_BUFSIZE);
return ret;
}
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