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// Copyright (C) 2013 - Will Glozer. All rights reserved.
#include <pthread.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "ssl.h"
SSL_CTX *ssl_init() {
SSL_CTX *ctx = NULL;
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
if ((ctx = SSL_CTX_new(SSLv23_client_method()))) {
SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL);
SSL_CTX_set_verify_depth(ctx, 0);
SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_CLIENT);
}
return ctx;
}
status ssl_connect(connection *c, char *host) {
int r;
SSL_set_fd(c->ssl, c->fd);
SSL_set_tlsext_host_name(c->ssl, host);
if ((r = SSL_connect(c->ssl)) != 1) {
switch (SSL_get_error(c->ssl, r)) {
case SSL_ERROR_WANT_READ: return RETRY;
case SSL_ERROR_WANT_WRITE: return RETRY;
default: return ERROR;
}
}
return OK;
}
status ssl_close(connection *c) {
SSL_shutdown(c->ssl);
SSL_clear(c->ssl);
return OK;
}
status ssl_read(connection *c, size_t *n) {
int r;
if ((r = SSL_read(c->ssl, c->buf, sizeof(c->buf))) <= 0) {
switch (SSL_get_error(c->ssl, r)) {
case SSL_ERROR_WANT_READ: return RETRY;
case SSL_ERROR_WANT_WRITE: return RETRY;
default: return ERROR;
}
}
*n = (size_t) r;
return OK;
}
status ssl_write(connection *c, char *buf, size_t len, size_t *n) {
int r;
if ((r = SSL_write(c->ssl, buf, len)) <= 0) {
switch (SSL_get_error(c->ssl, r)) {
case SSL_ERROR_WANT_READ: return RETRY;
case SSL_ERROR_WANT_WRITE: return RETRY;
default: return ERROR;
}
}
*n = (size_t) r;
return OK;
}
size_t ssl_readable(connection *c) {
return SSL_pending(c->ssl);
}
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