GUACAMOLE-205: Update to 1.1 version of OpenSSL API.
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c8fca94899
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dbfb782dd5
25
configure.ac
25
configure.ac
@ -236,6 +236,31 @@ then
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--------------------------------------------])
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else
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AC_DEFINE([ENABLE_SSL],, [Whether SSL-related support is enabled])
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# OpenSSL 1.1 accessor function for DSA signature values
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AC_CHECK_DECL([DSA_SIG_get0],
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[AC_DEFINE([HAVE_DSA_SIG_GET0],,
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[Whether libssl provides DSA_SIG_get0()])],,
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[#include <openssl/dsa.h>])
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# OpenSSL 1.1 accessor function for DSA public key parameters
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AC_CHECK_DECL([DSA_get0_pqg],
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[AC_DEFINE([HAVE_DSA_GET0_PQG],,
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[Whether libssl provides DSA_get0_pqg()])],,
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[#include <openssl/dsa.h>])
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# OpenSSL 1.1 accessor function for DSA public/private key values
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AC_CHECK_DECL([DSA_get0_key],
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[AC_DEFINE([HAVE_DSA_GET0_KEY],,
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[Whether libssl provides DSA_get0_key()])],,
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[#include <openssl/dsa.h>])
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# OpenSSL 1.1 accessor function for RSA public/private key values
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AC_CHECK_DECL([RSA_get0_key],
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[AC_DEFINE([HAVE_RSA_GET0_KEY],,
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[Whether libssl provides RSA_get0_key()])],,
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[#include <openssl/rsa.h>])
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fi
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fi
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@ -54,7 +54,7 @@ void guac_common_ssh_buffer_write_data(char** buffer, const char* data,
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*buffer += length;
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}
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void guac_common_ssh_buffer_write_bignum(char** buffer, BIGNUM* value) {
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void guac_common_ssh_buffer_write_bignum(char** buffer, const BIGNUM* value) {
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unsigned char* bn_buffer;
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int length;
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@ -76,7 +76,7 @@ void guac_common_ssh_buffer_write_string(char** buffer, const char* string,
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* @param value
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* The value to write.
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*/
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void guac_common_ssh_buffer_write_bignum(char** buffer, BIGNUM* value);
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void guac_common_ssh_buffer_write_bignum(char** buffer, const BIGNUM* value);
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/**
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* Writes the given data the given buffer, advancing the buffer pointer by the
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@ -53,6 +53,9 @@ guac_common_ssh_key* guac_common_ssh_key_alloc(char* data, int length,
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RSA* rsa_key;
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const BIGNUM* key_e;
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const BIGNUM* key_n;
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/* Read key */
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rsa_key = PEM_read_bio_RSAPrivateKey(key_bio, NULL, NULL, passphrase);
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if (rsa_key == NULL)
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@ -69,10 +72,18 @@ guac_common_ssh_key* guac_common_ssh_key_alloc(char* data, int length,
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public_key = malloc(4096);
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pos = public_key;
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/* Derive public key */
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/* Retrieve public key */
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#ifdef HAVE_RSA_GET0_KEY
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RSA_get0_key(rsa_key, &key_n, &key_e, NULL);
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#else
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key_n = rsa_key->n;
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key_e = rsa_key->e;
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#endif
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/* Send public key formatted for SSH */
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guac_common_ssh_buffer_write_string(&pos, "ssh-rsa", sizeof("ssh-rsa")-1);
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guac_common_ssh_buffer_write_bignum(&pos, rsa_key->e);
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guac_common_ssh_buffer_write_bignum(&pos, rsa_key->n);
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guac_common_ssh_buffer_write_bignum(&pos, key_e);
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guac_common_ssh_buffer_write_bignum(&pos, key_n);
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/* Save public key to structure */
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key->public_key = public_key;
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@ -87,6 +98,11 @@ guac_common_ssh_key* guac_common_ssh_key_alloc(char* data, int length,
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DSA* dsa_key;
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const BIGNUM* key_p;
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const BIGNUM* key_q;
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const BIGNUM* key_g;
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const BIGNUM* pub_key;
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/* Read key */
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dsa_key = PEM_read_bio_DSAPrivateKey(key_bio, NULL, NULL, passphrase);
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if (dsa_key == NULL)
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@ -103,12 +119,28 @@ guac_common_ssh_key* guac_common_ssh_key_alloc(char* data, int length,
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public_key = malloc(4096);
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pos = public_key;
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/* Derive public key */
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/* Retrieve public key parameters */
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#ifdef HAVE_DSA_GET0_PQG
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DSA_get0_pqg(dsa_key, &key_p, &key_q, &key_g);
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#else
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key_p = dsa_key->p;
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key_q = dsa_key->q;
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key_g = dsa_key->g;
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#endif
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/* Retrieve public key */
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#ifdef HAVE_DSA_GET0_KEY
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DSA_get0_key(dsa_key, &pub_key, NULL);
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#else
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pub_key = dsa_key->pub_key;
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#endif
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/* Send public key formatted for SSH */
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guac_common_ssh_buffer_write_string(&pos, "ssh-dss", sizeof("ssh-dss")-1);
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guac_common_ssh_buffer_write_bignum(&pos, dsa_key->p);
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guac_common_ssh_buffer_write_bignum(&pos, dsa_key->q);
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guac_common_ssh_buffer_write_bignum(&pos, dsa_key->g);
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guac_common_ssh_buffer_write_bignum(&pos, dsa_key->pub_key);
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guac_common_ssh_buffer_write_bignum(&pos, key_p);
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guac_common_ssh_buffer_write_bignum(&pos, key_q);
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guac_common_ssh_buffer_write_bignum(&pos, key_g);
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guac_common_ssh_buffer_write_bignum(&pos, pub_key);
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/* Save public key to structure */
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key->public_key = public_key;
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@ -156,7 +188,6 @@ int guac_common_ssh_key_sign(guac_common_ssh_key* key, const char* data,
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int length, unsigned char* sig) {
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const EVP_MD* md;
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EVP_MD_CTX md_ctx;
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unsigned char digest[EVP_MAX_MD_SIZE];
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unsigned int dlen, len;
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@ -165,10 +196,18 @@ int guac_common_ssh_key_sign(guac_common_ssh_key* key, const char* data,
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if ((md = EVP_get_digestbynid(NID_sha1)) == NULL)
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return -1;
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/* Allocate digest context */
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EVP_MD_CTX* md_ctx = EVP_MD_CTX_create();
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if (md_ctx == NULL)
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return -1;
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/* Digest data */
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EVP_DigestInit(&md_ctx, md);
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EVP_DigestUpdate(&md_ctx, data, length);
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EVP_DigestFinal(&md_ctx, digest, &dlen);
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EVP_DigestInit(md_ctx, md);
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EVP_DigestUpdate(md_ctx, data, length);
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EVP_DigestFinal(md_ctx, digest, &dlen);
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/* Digest context no longer needed */
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EVP_MD_CTX_destroy(md_ctx);
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/* Sign with key */
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switch (key->type) {
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@ -183,9 +222,20 @@ int guac_common_ssh_key_sign(guac_common_ssh_key* key, const char* data,
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DSA_SIG* dsa_sig = DSA_do_sign(digest, dlen, key->dsa);
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if (dsa_sig != NULL) {
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const BIGNUM* sig_r;
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const BIGNUM* sig_s;
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/* Retrieve DSA signature values */
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#ifdef HAVE_DSA_SIG_GET0
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DSA_SIG_get0(dsa_sig, &sig_r, &sig_s);
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#else
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sig_r = dsa_sig->r;
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sig_s = dsa_sig->s;
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#endif
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/* Compute size of each half of signature */
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int rlen = BN_num_bytes(dsa_sig->r);
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int slen = BN_num_bytes(dsa_sig->s);
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int rlen = BN_num_bytes(sig_r);
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int slen = BN_num_bytes(sig_s);
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/* Ensure each number is within the required size */
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if (rlen > DSA_SIG_NUMBER_SIZE || slen > DSA_SIG_NUMBER_SIZE)
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@ -195,11 +245,11 @@ int guac_common_ssh_key_sign(guac_common_ssh_key* key, const char* data,
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memset(sig, 0, DSA_SIG_SIZE);
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/* Add R at the end of the first block of the signature */
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BN_bn2bin(dsa_sig->r, sig + DSA_SIG_SIZE
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- DSA_SIG_NUMBER_SIZE - rlen);
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BN_bn2bin(sig_r, sig + DSA_SIG_SIZE
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- DSA_SIG_NUMBER_SIZE - rlen);
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/* Add S at the end of the second block of the signature */
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BN_bn2bin(dsa_sig->s, sig + DSA_SIG_SIZE - slen);
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BN_bn2bin(sig_s, sig + DSA_SIG_SIZE - slen);
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/* Done */
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DSA_SIG_free(dsa_sig);
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@ -45,6 +45,7 @@
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GCRY_THREAD_OPTION_PTHREAD_IMPL;
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#endif
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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/**
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* Array of mutexes, used by OpenSSL.
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*/
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@ -133,6 +134,7 @@ static void guac_common_ssh_openssl_free_locks(int count) {
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free(guac_common_ssh_openssl_locks);
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}
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#endif
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int guac_common_ssh_init(guac_client* client) {
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@ -145,10 +147,12 @@ int guac_common_ssh_init(guac_client* client) {
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}
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#endif
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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/* Init threadsafety in OpenSSL */
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guac_common_ssh_openssl_init_locks(CRYPTO_num_locks());
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CRYPTO_set_id_callback(guac_common_ssh_openssl_id_callback);
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CRYPTO_set_locking_callback(guac_common_ssh_openssl_locking_callback);
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#endif
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/* Init OpenSSL */
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SSL_library_init();
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@ -163,7 +167,9 @@ int guac_common_ssh_init(guac_client* client) {
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}
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void guac_common_ssh_uninit() {
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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guac_common_ssh_openssl_free_locks(CRYPTO_num_locks());
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#endif
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}
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/**
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@ -153,6 +153,7 @@ static int daemonize() {
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}
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#ifdef ENABLE_SSL
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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/**
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* Array of mutexes, used by OpenSSL.
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*/
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@ -242,6 +243,7 @@ static void guacd_openssl_free_locks(int count) {
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}
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#endif
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#endif
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int main(int argc, char* argv[]) {
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@ -359,10 +361,12 @@ int main(int argc, char* argv[]) {
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guacd_log(GUAC_LOG_INFO, "Communication will require SSL/TLS.");
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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/* Init threadsafety in OpenSSL */
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guacd_openssl_init_locks(CRYPTO_num_locks());
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CRYPTO_set_id_callback(guacd_openssl_id_callback);
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CRYPTO_set_locking_callback(guacd_openssl_locking_callback);
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#endif
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/* Init SSL */
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SSL_library_init();
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@ -490,7 +494,9 @@ int main(int argc, char* argv[]) {
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#ifdef ENABLE_SSL
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if (ssl_context != NULL) {
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#if OPENSSL_VERSION_NUMBER < 0x10100000L
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guacd_openssl_free_locks(CRYPTO_num_locks());
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#endif
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SSL_CTX_free(ssl_context);
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}
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#endif
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