/*

 * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (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/objects.h>

#include <openssl/x509.h>

#include <openssl/pem.h>

#include <openssl/x509v3.h>

#include <openssl/ocsp.h>

#include "ocsp_lcl.h"

#include <openssl/asn1t.h>

/* Convert a certificate and its issuer to an OCSP_CERTID */

OCSP_CERTID *OCSP_cert_to_id(const EVP_MD *dgst, const X509 *subject,

                             const X509 *issuer)

{

    X509_NAME *iname;

    const ASN1_INTEGER *serial;

    ASN1_BIT_STRING *ikey;

    if (!dgst)

        dgst = EVP_sha1();

    if (subject) {

        iname = X509_get_issuer_name(subject);

        serial = X509_get0_serialNumber(subject);

    } else {

        iname = X509_get_subject_name(issuer);

        serial = NULL;

    }

    ikey = X509_get0_pubkey_bitstr(issuer);

    return OCSP_cert_id_new(dgst, iname, ikey, serial);

}

OCSP_CERTID *OCSP_cert_id_new(const EVP_MD *dgst,

                              const X509_NAME *issuerName,

                              const ASN1_BIT_STRING *issuerKey,

                              const ASN1_INTEGER *serialNumber)

{

    int nid;

    unsigned int i;

    X509_ALGOR *alg;

    OCSP_CERTID *cid = NULL;

    unsigned char md[EVP_MAX_MD_SIZE];

    if ((cid = OCSP_CERTID_new()) == NULL)

        goto err;

    alg = &cid->hashAlgorithm;

    ASN1_OBJECT_free(alg->algorithm);

    if ((nid = EVP_MD_type(dgst)) == NID_undef) {

        OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_UNKNOWN_NID);

        goto err;

    }

    if ((alg->algorithm = OBJ_nid2obj(nid)) == NULL)

        goto err;

    if ((alg->parameter = ASN1_TYPE_new()) == NULL)

        goto err;

    alg->parameter->type = V_ASN1_NULL;

    if (!X509_NAME_digest(issuerName, dgst, md, &i))

        goto digerr;

    if (!(ASN1_OCTET_STRING_set(&cid->issuerNameHash, md, i)))

        goto err;

    /* Calculate the issuerKey hash, excluding tag and length */

    if (!EVP_Digest(issuerKey->data, issuerKey->length, md, &i, dgst, NULL))

        goto err;

    if (!(ASN1_OCTET_STRING_set(&cid->issuerKeyHash, md, i)))

        goto err;

    if (serialNumber) {

        if (ASN1_STRING_copy(&cid->serialNumber, serialNumber) == 0)

            goto err;

    }

    return cid;

 digerr:

    OCSPerr(OCSP_F_OCSP_CERT_ID_NEW, OCSP_R_DIGEST_ERR);

 err:

    OCSP_CERTID_free(cid);

    return NULL;

}

int OCSP_id_issuer_cmp(OCSP_CERTID *a, OCSP_CERTID *b)

{

    int ret;

    ret = OBJ_cmp(a->hashAlgorithm.algorithm, b->hashAlgorithm.algorithm);

    if (ret)

        return ret;

    ret = ASN1_OCTET_STRING_cmp(&a->issuerNameHash, &b->issuerNameHash);

    if (ret)

        return ret;

    return ASN1_OCTET_STRING_cmp(&a->issuerKeyHash, &b->issuerKeyHash);

}

int OCSP_id_cmp(OCSP_CERTID *a, OCSP_CERTID *b)

{

    int ret;

    ret = OCSP_id_issuer_cmp(a, b);

    if (ret)

        return ret;

    return ASN1_INTEGER_cmp(&a->serialNumber, &b->serialNumber);

}

/*

 * Parse a URL and split it up into host, port and path components and

 * whether it is SSL.

 */

int OCSP_parse_url(const char *url, char **phost, char **pport, char **ppath,

                   int *pssl)

{

    char *p, *buf;

    char *host, *port;

    *phost = NULL;

    *pport = NULL;

    *ppath = NULL;

    /* dup the buffer since we are going to mess with it */

    buf = OPENSSL_strdup(url);

    if (!buf)

        goto mem_err;

    /* Check for initial colon */

    p = strchr(buf, ':');

    if (!p)

        goto parse_err;

    *(p++) = '\0';

    if (strcmp(buf, "http") == 0) {

        *pssl = 0;

        port = "80";

    } else if (strcmp(buf, "https") == 0) {

        *pssl = 1;

        port = "443";

    } else

        goto parse_err;

    /* Check for double slash */

    if ((p[0] != '/') || (p[1] != '/'))

        goto parse_err;

    p += 2;

    host = p;

    /* Check for trailing part of path */

    p = strchr(p, '/');

    if (!p)

        *ppath = OPENSSL_strdup("/");

    else {

        *ppath = OPENSSL_strdup(p);

        /* Set start of path to 0 so hostname is valid */

        *p = '\0';

    }

    if (!*ppath)

        goto mem_err;

    p = host;

    if (host[0] == '[') {

        /* ipv6 literal */

        host++;

        p = strchr(host, ']');

        if (!p)

            goto parse_err;

        *p = '\0';

        p++;

    }

    /* Look for optional ':' for port number */

    if ((p = strchr(p, ':'))) {

        *p = 0;

        port = p + 1;

    }

    *pport = OPENSSL_strdup(port);

    if (!*pport)

        goto mem_err;

    *phost = OPENSSL_strdup(host);

    if (!*phost)

        goto mem_err;

    OPENSSL_free(buf);

    return 1;

 mem_err:

    OCSPerr(OCSP_F_OCSP_PARSE_URL, ERR_R_MALLOC_FAILURE);

    goto err;

 parse_err:

    OCSPerr(OCSP_F_OCSP_PARSE_URL, OCSP_R_ERROR_PARSING_URL);

 err:

    OPENSSL_free(buf);

    OPENSSL_free(*ppath);

    *ppath = NULL;

    OPENSSL_free(*pport);

    *pport = NULL;

    OPENSSL_free(*phost);

    *phost = NULL;

    return 0;

}

IMPLEMENT_ASN1_DUP_FUNCTION(OCSP_CERTID)