mirror of
https://github.com/openssl/openssl.git
synced 2024-11-21 01:15:20 +08:00
147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/*
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* Copyright 2016 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 <limits.h>
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#include <string.h>
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#include <openssl/ct.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include "ct_locl.h"
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/*
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* Decodes the base64 string |in| into |out|.
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* A new string will be malloc'd and assigned to |out|. This will be owned by
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* the caller. Do not provide a pre-allocated string in |out|.
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*/
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static int ct_base64_decode(const char *in, unsigned char **out)
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{
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size_t inlen = strlen(in);
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int outlen;
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unsigned char *outbuf = NULL;
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if (inlen == 0) {
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*out = NULL;
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return 0;
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}
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outlen = (inlen / 4) * 3;
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outbuf = OPENSSL_malloc(outlen);
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if (outbuf == NULL) {
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CTerr(CT_F_CT_BASE64_DECODE, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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outlen = EVP_DecodeBlock(outbuf, (unsigned char *)in, inlen);
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if (outlen < 0) {
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CTerr(CT_F_CT_BASE64_DECODE, CT_R_BASE64_DECODE_ERROR);
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goto err;
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}
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*out = outbuf;
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return outlen;
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err:
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OPENSSL_free(outbuf);
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return -1;
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}
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SCT *SCT_new_from_base64(unsigned char version, const char *logid_base64,
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ct_log_entry_type_t entry_type, uint64_t timestamp,
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const char *extensions_base64,
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const char *signature_base64)
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{
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SCT *sct = SCT_new();
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unsigned char *dec = NULL;
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int declen;
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if (sct == NULL) {
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CTerr(CT_F_SCT_NEW_FROM_BASE64, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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/*
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* RFC6962 section 4.1 says we "MUST NOT expect this to be 0", but we
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* can only construct SCT versions that have been defined.
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*/
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if (!SCT_set_version(sct, version)) {
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CTerr(CT_F_SCT_NEW_FROM_BASE64, CT_R_SCT_UNSUPPORTED_VERSION);
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goto err;
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}
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declen = ct_base64_decode(logid_base64, &dec);
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if (declen < 0) {
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CTerr(CT_F_SCT_NEW_FROM_BASE64, X509_R_BASE64_DECODE_ERROR);
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goto err;
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}
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if (!SCT_set0_log_id(sct, dec, declen))
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goto err;
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dec = NULL;
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declen = ct_base64_decode(extensions_base64, &dec);
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if (declen < 0) {
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CTerr(CT_F_SCT_NEW_FROM_BASE64, X509_R_BASE64_DECODE_ERROR);
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goto err;
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}
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SCT_set0_extensions(sct, dec, declen);
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dec = NULL;
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declen = ct_base64_decode(signature_base64, &dec);
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if (declen < 0) {
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CTerr(CT_F_SCT_NEW_FROM_BASE64, X509_R_BASE64_DECODE_ERROR);
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goto err;
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}
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if (o2i_SCT_signature(sct, (const unsigned char **)&dec, declen) <= 0)
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goto err;
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OPENSSL_free(dec);
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dec = NULL;
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SCT_set_timestamp(sct, timestamp);
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if (!SCT_set_log_entry_type(sct, entry_type))
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goto err;
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return sct;
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err:
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OPENSSL_free(dec);
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SCT_free(sct);
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return NULL;
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}
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CTLOG *CTLOG_new_from_base64(const char *pkey_base64, const char *name)
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{
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unsigned char *pkey_der = NULL;
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int pkey_der_len = ct_base64_decode(pkey_base64, &pkey_der);
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const unsigned char *p;
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EVP_PKEY *pkey = NULL;
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CTLOG *log = NULL;
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if (pkey_der_len <= 0) {
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CTerr(CT_F_CTLOG_NEW_FROM_BASE64, CT_R_LOG_CONF_INVALID_KEY);
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return NULL;
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}
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p = pkey_der;
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pkey = d2i_PUBKEY(NULL, &p, pkey_der_len);
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OPENSSL_free(pkey_der);
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if (pkey == NULL) {
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CTerr(CT_F_CTLOG_NEW_FROM_BASE64, CT_R_LOG_CONF_INVALID_KEY);
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return NULL;
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}
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log = CTLOG_new(pkey, name);
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if (log == NULL) {
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EVP_PKEY_free(pkey);
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return NULL;
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}
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return log;
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}
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