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sslutils.c
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sslutils.c
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/*-------------------------------------------------------------------------
*
* Postgres Enterprise Manager - Openssl utils plugin
*
* Copyright (C) 2011 - 2020, EnterpriseDB Corporation. All rights reserved.
*
* This code is licensed under the EnterpriseDB Limited Use License for use
* by customers with an active subscription to EDB Postgres Standard,
* Enterprise or Developer Edition.
*
* Redistribution is strictly prohibited.
*
*-------------------------------------------------------------------------
*/
/*
* OpenSSL library access from PostgreSQL
*/
#include "postgres.h"
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/asn1.h>
#include <openssl/x509v3.h>
#include "fmgr.h"
#include "utils/builtins.h"
#include "utils/datetime.h"
// Start from PG-16, VARDATA_ANY was moved from postgres.h to varatt.h
#if PG_VERSION_NUM >= 160000
#include "varatt.h"
#endif
#define SERIAL_RAND_BITS 64
#define VALIDITY_DAYS 3650
#define BUFFER_PADDING_BYTES 50
#define DB_NUMBER 6
#define DB_name 5
#define DB_file 4
#define DB_serial 3
#define DB_rev_date 2
#define DB_exp_date 1
#define DB_type 0
#define OCSP_REVOKED_STATUS_NOSTATUS -1
#define OCSP_REVOKED_STATUS_KEYCOMPROMISE 1
#define OCSP_REVOKED_STATUS_CACOMPROMISE 2
#define OCSP_REVOKED_STATUS_CERTIFICATEHOLD 6
#define OCSP_REVOKED_STATUS_REMOVEFROMCRL 8
static const char* crl_reasons[] = {
// CRL reason strings
"unspecified",
"keyCompromise",
"CACompromise",
"affiliationChanged",
"superseded",
"cessationOfOperation",
"certificateHold",
"removeFromCRL",
// Additional pseudo reasons
"holdInstruction",
"keyTime",
"CAkeyTime"
};
#define NUM_REASONS (sizeof(crl_reasons) / sizeof(char *))
PG_MODULE_MAGIC;
void PGDLLEXPORT _PG_init(void);
Datum PGDLLEXPORT openssl_rsa_generate_key(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT openssl_rsa_key_to_csr(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT openssl_csr_to_crt(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT openssl_rsa_generate_crl(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT sslutils_version(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT openssl_is_crt_expire_on(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT openssl_revoke_certificate(PG_FUNCTION_ARGS);
Datum PGDLLEXPORT openssl_get_crt_expiry_date(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(openssl_rsa_generate_key);
PG_FUNCTION_INFO_V1(openssl_rsa_key_to_csr);
PG_FUNCTION_INFO_V1(openssl_csr_to_crt);
PG_FUNCTION_INFO_V1(openssl_rsa_generate_crl);
PG_FUNCTION_INFO_V1(sslutils_version);
PG_FUNCTION_INFO_V1(openssl_is_crt_expire_on);
PG_FUNCTION_INFO_V1(openssl_revoke_certificate);
PG_FUNCTION_INFO_V1(openssl_get_crt_expiry_date);
time_t ASN1_GetTimeT(ASN1_TIME* time);
#define PEM_SSLUTILS_VERSION "1.3"
/* On module load, make sure SSL error strings are available. */
void
_PG_init(void)
{
SSL_load_error_strings();
}
/* Report an error within OpenSSL. */
static void
report_openssl_error(char *where)
{
unsigned long e = ERR_get_error();
char *err = ERR_error_string(e, NULL);
ereport(ERROR,
(errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
errmsg("OpenSSL error (%s): %s", where, err)));
}
static char* string_sep(char **stringp, const char *delim)
{
char *start = *stringp, *p = start ? strpbrk(start, delim) : NULL;
if (!p) {
*stringp = NULL;
} else {
*p = 0;
*stringp = p + 1;
}
return start;
}
/*
* This function make certificate revocation string.
*/
static char* make_revocation_str()
{
char* str;
ASN1_UTCTIME* revtm = NULL;
int i;
revtm = X509_gmtime_adj(NULL, 0);
if (!revtm)
return NULL;
i = revtm->length + 1;
str = OPENSSL_malloc(i);
if (!str)
return NULL;
BUF_strlcpy(str, (char *)revtm->data, i);
ASN1_UTCTIME_free(revtm);
return str;
}
/*
* This function revoke client certificate and add entry in database file.
*/
static int revoke(const char* dbfile, X509* x)
{
int i;
ASN1_UTCTIME* tm = NULL;
char* rev_str = NULL;
BIGNUM* bn = NULL;
char* row[DB_NUMBER];
FILE *revoke_file = NULL;
char line[512] = {0};
for (i = 0; i < DB_NUMBER; i++)
row[i] = NULL;
row[DB_name] = X509_NAME_oneline(X509_get_subject_name(x), NULL, 0);
bn = ASN1_INTEGER_to_BN(X509_get_serialNumber(x), NULL);
if (bn == NULL)
return -1;
if (BN_is_zero(bn))
row[DB_serial] = BUF_strdup("00");
else
row[DB_serial] = BN_bn2hex(bn);
BN_free(bn);
if (row[DB_name] == NULL || row[DB_serial] == NULL)
return -1;
// open database file in append to add certificate to be revoked.
revoke_file = fopen(dbfile, "a+");
if (revoke_file == NULL)
return -1;
// Lookup whether the client cert has been revoke by serial number
// and rotate the index.txt
while (fgets(line, 512, revoke_file))
{
char* sep = "\t";
char* token;
int j = 0;
char* p = line;
while ((token = string_sep(&p, sep)) != NULL)
{
if (++j == DB_serial + 1)
{
if (strcmp(row[DB_serial], token) == 0)
{
// serial number already found in CRL file.
fclose(revoke_file);
return -1;
}
break;
}
}
}
// Insert new record to index.txt
row[DB_type] = (char *)OPENSSL_malloc(2);
tm = X509_get_notAfter(x);
row[DB_exp_date] = (char *)OPENSSL_malloc(tm->length + 1);
memcpy(row[DB_exp_date], tm->data, tm->length);
row[DB_exp_date][tm->length] = '\0';
row[DB_rev_date] = NULL;
row[DB_file] = (char *)OPENSSL_malloc(8);
if (row[DB_type] == NULL || row[DB_exp_date] == NULL || row[DB_file] == NULL)
return -1;
BUF_strlcpy(row[DB_file], "unknown", 8);
row[DB_type][0] = 'V';
row[DB_type][1] = '\0';
rev_str = make_revocation_str();
if (rev_str == NULL)
return -1;
row[DB_type][0] = 'R';
row[DB_type][1] = '\0';
row[DB_rev_date] = rev_str;
for (i = 0; i < DB_NUMBER; i++)
{
if (row[i] != NULL)
{
fwrite(row[i], strlen(row[i]), 1, revoke_file);
fwrite("\t", 1, 1, revoke_file);
OPENSSL_free(row[i]);
}
}
fwrite("\n", 1, 1, revoke_file);
fclose(revoke_file);
return 0;
}
/*
* This function get the certificate revision information.
*/
static int unpack_revinfo(ASN1_TIME** prevtm, int* preason, ASN1_OBJECT** phold,
ASN1_GENERALIZEDTIME** pinvtm, const char* str)
{
char* tmp = NULL;
char* rtime_str, *reason_str = NULL, *arg_str = NULL, *p;
int reason_code = -1;
int ret = 0;
unsigned int i;
ASN1_OBJECT* hold = NULL;
ASN1_GENERALIZEDTIME* comp_time = NULL;
char errBuffer[512] = {0};
tmp = BUF_strdup(str);
if(!tmp)
{
snprintf (errBuffer, sizeof(errBuffer), "memory allocation failure\n");
goto err;
}
p = strchr(tmp, ',');
rtime_str = tmp;
if (p)
{
*p = '\0';
p++;
reason_str = p;
p = strchr(p, ',');
if (p)
{
*p = '\0';
arg_str = p + 1;
}
}
if (prevtm)
{
*prevtm = ASN1_UTCTIME_new();
if(!*prevtm)
{
snprintf (errBuffer, sizeof(errBuffer), "memory allocation failure\n");
goto err;
}
if (!ASN1_UTCTIME_set_string(*prevtm, rtime_str))
{
snprintf (errBuffer, sizeof(errBuffer), "invalid revocation date %s\n", rtime_str);
goto err;
}
}
if (reason_str)
{
for (i = 0; i < NUM_REASONS; i++)
{
#ifdef WIN32
if (!stricmp(reason_str, crl_reasons[i]))
#else
if (!strcasecmp(reason_str, crl_reasons[i]))
#endif
{
reason_code = i;
break;
}
}
if (reason_code == OCSP_REVOKED_STATUS_NOSTATUS)
{
snprintf (errBuffer, sizeof(errBuffer), "invalid reason code %s\n", reason_str);
goto err;
}
if (reason_code == 7)
reason_code = OCSP_REVOKED_STATUS_REMOVEFROMCRL;
else if (reason_code == 8)
{
if (!arg_str)
{
snprintf (errBuffer, sizeof(errBuffer), "missing hold instruction\n");
goto err;
}
reason_code = OCSP_REVOKED_STATUS_CERTIFICATEHOLD;
hold = OBJ_txt2obj(arg_str, 0);
if (!hold)
{
snprintf (errBuffer, sizeof(errBuffer), "invalid object identifier %s\n", arg_str);
goto err;
}
if (phold)
*phold = hold;
}
else if ((reason_code == 9) || (reason_code == 10))
{
if (!arg_str)
{
snprintf (errBuffer, sizeof(errBuffer), "missing compromised time\n");
goto err;
}
comp_time = ASN1_GENERALIZEDTIME_new();
if(!comp_time)
{
snprintf (errBuffer, sizeof(errBuffer), "memory allocation failure\n");
goto err;
}
if (!ASN1_GENERALIZEDTIME_set_string(comp_time, arg_str))
{
snprintf (errBuffer, sizeof(errBuffer), "invalid compromised time %s\n", arg_str);
goto err;
}
if (reason_code == 9)
reason_code = OCSP_REVOKED_STATUS_KEYCOMPROMISE;
else
reason_code = OCSP_REVOKED_STATUS_CACOMPROMISE;
}
}
if (preason)
*preason = reason_code;
if (pinvtm)
*pinvtm = comp_time;
else
ASN1_GENERALIZEDTIME_free(comp_time);
ret = 1;
err:
if (tmp)
OPENSSL_free(tmp);
if (!phold)
ASN1_OBJECT_free(hold);
if (!pinvtm)
ASN1_GENERALIZEDTIME_free(comp_time);
if (errBuffer[0] != 0)
report_openssl_error(errBuffer);
return ret;
}
/*
* Convert revocation field to X509_REVOKED entry
* return code:
* 0 error
* 1 OK
* 2 OK and some extensions added (i.e. V2 CRL)
*/
static int make_revoked(X509_REVOKED* rev, const char* str)
{
char* tmp = NULL;
int reason_code = -1;
int i, ret = 0;
ASN1_OBJECT* hold = NULL;
ASN1_GENERALIZEDTIME* comp_time = NULL;
ASN1_ENUMERATED* rtmp = NULL;
ASN1_TIME* revDate = NULL;
i = unpack_revinfo(&revDate, &reason_code, &hold, &comp_time, str);
if (i == 0)
goto err;
if (rev && !X509_REVOKED_set_revocationDate(rev, revDate))
goto err;
if (rev && (reason_code != OCSP_REVOKED_STATUS_NOSTATUS))
{
rtmp = ASN1_ENUMERATED_new();
if (!rtmp || !ASN1_ENUMERATED_set(rtmp, reason_code))
goto err;
if (!X509_REVOKED_add1_ext_i2d(rev, NID_crl_reason, rtmp, 0, 0))
goto err;
}
if (rev && comp_time)
{
if (!X509_REVOKED_add1_ext_i2d(rev, NID_invalidity_date, comp_time, 0, 0))
goto err;
}
if (rev && hold)
{
if (!X509_REVOKED_add1_ext_i2d
(rev, NID_hold_instruction_code, hold, 0, 0))
goto err;
}
if (reason_code != OCSP_REVOKED_STATUS_NOSTATUS)
ret = 2;
else
ret = 1;
err:
if (tmp)
OPENSSL_free(tmp);
if (hold)
ASN1_OBJECT_free(hold);
if (comp_time)
ASN1_GENERALIZEDTIME_free(comp_time);
if (rtmp)
ASN1_ENUMERATED_free(rtmp);
if (revDate)
ASN1_TIME_free(revDate);
return ret;
}
/*
* Generate an RSA key.
*/
Datum
openssl_rsa_generate_key(PG_FUNCTION_ARGS)
{
int bits = PG_GETARG_INT32(0);
int ret = 0;
RSA *rsa = NULL;
BIO *bio = NULL;
const char *err = NULL;
char *data = NULL;
long len;
text *res = NULL;
BIGNUM *bne = NULL;
unsigned long rsa_f4 = RSA_F4;
/*
* Don't allow too many bits. It takes a long time, and since
* RSA_generate_key() is an external library function, it's not
* interruptible.
*/
if (bits > 8192)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("maximum number of bits is 8192")));
bne = BN_new();
ret = BN_set_word(bne, rsa_f4);
if(ret != 1)
{
err = "BN_set_word";
goto out;
}
/* Generate key. */
rsa = RSA_new();
ret = RSA_generate_key_ex(rsa, bits, bne, NULL);
if (ret != 1)
{
err = "RSA_generate_key";
goto out;
}
/* Set up output buffer. */
bio = BIO_new(BIO_s_mem());
if (!bio)
{
err = "BIO_new";
goto out;
}
/* Write data to buffer. */
if (!PEM_write_bio_RSAPrivateKey(bio, rsa, NULL, NULL, 0, NULL, NULL))
{
err = "PEM_write_bio_RSAPrivateKey";
goto out;
}
/* Construct return value. */
len = BIO_get_mem_data(bio, &data);
res = cstring_to_text_with_len(data, len);
/* Get out, while trying not to leak memory. */
out:
if (bne != NULL)
BN_free(bne);
if (bio != NULL)
BIO_free(bio);
if (rsa != NULL)
RSA_free(rsa);
if (err != NULL)
report_openssl_error((char *)err);
PG_RETURN_TEXT_P(res);
}
/*
* Generate an X509_REQ, also known as a CSR.
*
* We currently support only the "CN" attribute, since that's the only thing
* that PostgreSQL cares about for client authentication.
*/
Datum
openssl_rsa_key_to_csr(PG_FUNCTION_ARGS)
{
text *key = PG_GETARG_TEXT_PP(0);
text *cn = PG_GETARG_TEXT_PP(1);
text *country = PG_GETARG_TEXT_PP(2);
text *state = PG_GETARG_TEXT_PP(3);
text *city = PG_GETARG_TEXT_PP(4);
text *organization = cstring_to_text("EnterpriseDB Corporation");
text *organization_unit = PG_GETARG_TEXT_PP(5);
text *email = PG_GETARG_TEXT_PP(6);
BIO *bio = NULL;
RSA *rsa = NULL;
char *err = NULL;
X509_REQ *req = NULL;
EVP_PKEY *evp = NULL;
X509_NAME *name = NULL;
char *data = NULL;
long len;
text *res = NULL;
/* Decode key to RSA. */
bio = BIO_new_mem_buf(VARDATA_ANY(key), VARSIZE_ANY_EXHDR(key));
if (!bio)
{
err = "BIO_new_mem_buf";
goto out;
}
rsa = PEM_read_bio_RSAPrivateKey(bio, NULL, NULL, NULL);
BIO_free(bio);
bio = NULL;
if (!rsa)
{
err = "PEM_read_bio_RSAPrivateKey";
goto out;
}
/* Create X509_REQ structure. */
req = X509_REQ_new();
if (!req)
{
err = "X509_REQ_new";
goto out;
}
/* Use EVP_PKEY to bind RSA to X509_REQ. */
evp = EVP_PKEY_new();
if (!evp)
{
err = "EVP_PKEY_new";
goto out;
}
if (!EVP_PKEY_set1_RSA(evp, rsa))
{
err = "EVP_PKEY_assign_RSA";
goto out;
}
/* Add attributes. */
name = X509_REQ_get_subject_name(req);;
if (!name)
{
err = "X509_REQ_get_subject_name";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "C", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(country),
VARSIZE_ANY_EXHDR(country), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_C";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "ST", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(state),
VARSIZE_ANY_EXHDR(state), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_ST";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "L", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(city),
VARSIZE_ANY_EXHDR(city), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_L";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "O", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(organization),
VARSIZE_ANY_EXHDR(organization), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_O";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "OU", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(organization_unit),
VARSIZE_ANY_EXHDR(organization_unit), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_OU";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(cn),
VARSIZE_ANY_EXHDR(cn), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_CN";
goto out;
}
if (!X509_NAME_add_entry_by_txt(name, "emailAddress", MBSTRING_UTF8,
(unsigned char *) VARDATA_ANY(email),
VARSIZE_ANY_EXHDR(email), -1, 0))
{
err = "X509_NAME_add_entry_by_txt_emailAddress";
goto out;
}
if (!X509_REQ_set_pubkey(req, evp))
{
err = "X509_REQ_set_pubkey";
goto out;
}
if (!X509_REQ_sign(req, evp, EVP_sha256()))
{
err = "X509_REQ_sign";
goto out;
}
/* Write X509_REQ out in PEM format. */
bio = BIO_new(BIO_s_mem());
if (!bio)
{
err = "BIO_new";
goto out;
}
if (!PEM_write_bio_X509_REQ(bio, req))
{
err = "PEM_write_bio_X509_REQ";
goto out;
}
/* Construct return value. */
len = BIO_get_mem_data(bio, &data);
res = cstring_to_text_with_len(data, len);
/* Get out, while trying not to leak memory. */
out:
if (evp != NULL)
EVP_PKEY_free(evp);
if (req != NULL)
X509_REQ_free(req);
if (rsa != NULL)
RSA_free(rsa);
if (bio != NULL)
BIO_free(bio);
if (err != NULL)
report_openssl_error(err);
PG_RETURN_TEXT_P(res);
}
/*
* Generate an X509, also known as a CRT.
*
*/
Datum
openssl_csr_to_crt(PG_FUNCTION_ARGS)
{
text *csr = NULL;
text *ca_cert_file_path = NULL;
text *ca_key_file_path = NULL;
BIO *bio = NULL;
RSA *ca_key = NULL;
char *err = NULL;
X509_REQ *req = NULL;
X509 *ca_cert = NULL;
char *data = NULL;
long len;
text *res = NULL;
BIO *bio_cert_file = NULL;
BIO *bio_key = NULL;
X509 *certificate = NULL;
EVP_PKEY *pkey = NULL;
X509_EXTENSION *extension = NULL;
ASN1_INTEGER *serial_no = NULL;
BIGNUM *bn = NULL;
X509V3_CTX ctx;
X509_NAME *xn = NULL;
if (PG_ARGISNULL(0))
{
err = "CSR_IS_NULL";
goto out;
}
csr = PG_GETARG_TEXT_PP(0);
if (!PG_ARGISNULL(1))
{
ca_cert_file_path = PG_GETARG_TEXT_PP(1);
/* Get the CA certificate */
bio_cert_file = BIO_new_file(text_to_cstring(ca_cert_file_path), "r");
if (!bio_cert_file)
{
err = "FILE_OPEN_CA_CERT";
goto out;
}
ca_cert = PEM_read_bio_X509(bio_cert_file, NULL, NULL, NULL);
if (!ca_cert)
{
err = "PEM_read_X509";
goto out;
}
}
if (PG_ARGISNULL(2))
{
err = "PRIVATE_KEY_IS_NULL";
goto out;
}
ca_key_file_path = PG_GETARG_TEXT_PP(2);
/* Get the CA private key */
bio_key = BIO_new_file(text_to_cstring(ca_key_file_path), "r");
if (!bio_key)
{
err = "FILE_OPEN_CA_KEY";
goto out;
}
ca_key = PEM_read_bio_RSAPrivateKey(bio_key, NULL, NULL, NULL);
if (!ca_key)
{
err = "PEM_read_RSAPrivateKey";
goto out;
}
/* Decode csr to X509_REQ */
bio = BIO_new_mem_buf(VARDATA_ANY(csr), VARSIZE_ANY_EXHDR(csr));
if (!bio)
{
err = "BIO_new_mem_buf";
goto out;
}
req = PEM_read_bio_X509_REQ(bio, NULL, NULL, NULL);
BIO_free(bio);
bio = NULL;
if (!req)
{
err = "PEM_read_bio_X509_REQ";
goto out;
}
/* Use EVP_PKEY to bind RSA to X509_REQ. */
pkey = EVP_PKEY_new();
if (!pkey)
{
err = "EVP_PKEY_new";
goto out;
}
if (!EVP_PKEY_set1_RSA(pkey, ca_key))
{
err = "EVP_PKEY_assign_RSA";
goto out;
}
certificate = X509_new();
if (!certificate)
{
err = "Error_creating_certificate";
goto out;
}
// set version to X509 v3 certificate
if (!X509_set_version(certificate, 2)) {
err = "Error_setting_certificate_version";
goto out;
}
xn = X509_REQ_get_subject_name(req);
if (!xn)
{
err = "Error_getting_subject_name";
goto out;
}
if (!X509_set_subject_name(certificate, X509_NAME_dup(xn)))
{
err = "Error_setting_subject_name";
goto out;
}
if (!X509_gmtime_adj(X509_get_notBefore(certificate), 0))
{
err = "Error_setting_validity_before_time";
goto out;
}
if (!X509_gmtime_adj(X509_get_notAfter(certificate), (long)60 * 60 * 24 * VALIDITY_DAYS))
{
err = "Error_setting_validity_before_time";
goto out;
}
if(!X509_set_pubkey(certificate, X509_REQ_get_pubkey(req)))
{
err = "Error_setting_public_key";
goto out;
}
if (!X509_set_issuer_name(certificate, ca_cert ? X509_get_subject_name(ca_cert) : X509_NAME_dup(xn)))
{
err = "Error_setting_issuer_name";
goto out;
}
serial_no = ASN1_INTEGER_new();
if (!serial_no)
{
err = "Error_allocating_memory_for_serial";
goto out;
}
bn = BN_new();
if (!bn)
{
err = "Error_allocating_memory_for_bignum";
goto out;
}
if (!BN_pseudo_rand(bn, SERIAL_RAND_BITS, 0, 0))
{
err = "Error_generating_random_bignum";
goto out;
}
serial_no = BN_to_ASN1_INTEGER(bn, serial_no);
if (!serial_no)
{
err = "Error_converting_bignum_to_ASN1_INTEGER";
goto out;
}
if (!X509_set_serialNumber(certificate, serial_no))
{
err = "Error_setting_serialNumber";
goto out;
}
X509V3_set_ctx(&ctx, ca_cert , certificate, NULL, NULL, 0);
extension = X509V3_EXT_conf_nid(NULL, &ctx, NID_subject_key_identifier, (char *)"hash");
if (!extension)
{
err = "Error_adding_extension_subject_key_identifier";
goto out;
}
X509_add_ext(certificate, extension, -1);
X509V3_set_ctx(&ctx, ca_cert , certificate, NULL, NULL, 0);
if (ca_cert)
X509V3_set_ctx(&ctx, ca_cert , certificate, NULL, NULL, 0);
else
X509V3_set_ctx(&ctx, certificate , certificate, NULL, NULL, 0);
extension = X509V3_EXT_conf_nid(NULL, &ctx, NID_authority_key_identifier, (char *)"keyid:always");
if (!extension)
{
err = "Error_adding_extension_authority_key_identifier";
goto out;
}
X509_add_ext(certificate, extension, -1);
if (!ca_cert)
{
X509V3_set_ctx(&ctx, ca_cert , certificate, NULL, NULL, 0);
extension = X509V3_EXT_conf_nid(NULL, &ctx, NID_basic_constraints, (char *)"CA:TRUE");
if (!extension)
{
err = "Error_adding_extension_basic_constraints";
goto out;
}
X509_add_ext(certificate, extension, -1);
}
if (!X509_sign(certificate, pkey, EVP_sha256()))
{
err = "Error_signing_certificate";
goto out;
}
/* Write X509 out in PEM format. */
bio = BIO_new(BIO_s_mem());
if (!bio)
{
err = "BIO_new";
goto out;
}
if (!PEM_write_bio_X509(bio, certificate))
{
err = "PEM_write_bio_X509";
goto out;
}
/* Construct return value. */
len = BIO_get_mem_data(bio, &data);
res = cstring_to_text_with_len(data, len);
/* Get out, while trying not to leak memory. */
out:
if (pkey != NULL)
EVP_PKEY_free(pkey);
if (req != NULL)
X509_REQ_free(req);
if (ca_cert != NULL)
X509_free(ca_cert);
if (ca_key != NULL)
RSA_free(ca_key);
if (bio != NULL)
BIO_free(bio);
if (extension != NULL)
X509_EXTENSION_free(extension);
if (serial_no != NULL)
ASN1_INTEGER_free(serial_no);
if (err != NULL)
report_openssl_error(err);
if (bio_cert_file != NULL)
BIO_free(bio_cert_file);
if (bio_key != NULL)
BIO_free(bio_key);
PG_RETURN_TEXT_P(res);
}
/*
* Generate an X509_CRL, also known as a CRL.
*
*/
Datum
openssl_rsa_generate_crl(PG_FUNCTION_ARGS)
{
text *ca_cert_file_path = NULL;
text *ca_key_file_path = NULL;
BIO *bio = NULL;
RSA *ca_key = NULL;
char *err = NULL;
X509 *ca_cert = NULL;
char *data = NULL;
long len;
text *res = NULL;
BIO *bio_cert_file = NULL;
BIO *bio_key = NULL;
X509_CRL *crl = NULL;