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https://github.com/kasmtech/KasmVNC.git
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66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
#include "WuCrypto.h"
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#include <assert.h>
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#include <openssl/hmac.h>
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#include <openssl/rand.h>
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#include "WuRng.h"
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WuSHA1Digest WuSHA1(const uint8_t* src, size_t len, const void* key,
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size_t keyLen) {
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WuSHA1Digest digest;
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HMAC(EVP_sha1(), key, keyLen, src, len, digest.bytes, NULL);
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return digest;
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}
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WuCert::WuCert() : key(EVP_PKEY_new()), x509(X509_new()) {
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RSA* rsa = RSA_new();
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BIGNUM* n = BN_new();
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BN_set_word(n, RSA_F4);
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if (!RAND_status()) {
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uint64_t seed = WuRandomU64();
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RAND_seed(&seed, sizeof(seed));
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}
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RSA_generate_key_ex(rsa, 2048, n, NULL);
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EVP_PKEY_assign_RSA(key, rsa);
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BIGNUM* serial = BN_new();
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X509_NAME* name = X509_NAME_new();
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X509_set_pubkey(x509, key);
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BN_pseudo_rand(serial, 64, 0, 0);
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X509_set_version(x509, 0L);
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X509_NAME_add_entry_by_NID(name, NID_commonName, MBSTRING_UTF8,
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(unsigned char*)"wusocket", -1, -1, 0);
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X509_set_subject_name(x509, name);
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X509_set_issuer_name(x509, name);
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X509_gmtime_adj(X509_get_notBefore(x509), 0);
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X509_gmtime_adj(X509_get_notAfter(x509), 365 * 24 * 3600);
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X509_sign(x509, key, EVP_sha1());
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unsigned int len = 32;
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uint8_t buf[32] = {0};
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X509_digest(x509, EVP_sha256(), buf, &len);
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assert(len == 32);
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for (unsigned int i = 0; i < len; i++) {
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if (i < 31) {
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snprintf(fingerprint + i * 3, 4, "%02X:", buf[i]);
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} else {
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snprintf(fingerprint + i * 3, 3, "%02X", buf[i]);
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}
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}
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fingerprint[95] = '\0';
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BN_free(n);
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BN_free(serial);
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X509_NAME_free(name);
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}
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WuCert::~WuCert() {
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EVP_PKEY_free(key);
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X509_free(x509);
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}
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