99 lines
1.4 KiB
C
99 lines
1.4 KiB
C
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#include <u.h>
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#include <openssl/bio.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include "a.h"
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AUTOLIB(ssl)
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static void
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httpsinit(void)
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{
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ERR_load_crypto_strings();
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ERR_load_SSL_strings();
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SSL_load_error_strings();
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SSL_library_init();
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}
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struct Pfd
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{
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BIO *sbio;
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};
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static Pfd*
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opensslconnect(char *host)
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{
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Pfd *pfd;
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BIO *sbio;
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SSL_CTX *ctx;
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SSL *ssl;
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static int didinit;
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char buf[1024];
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if(!didinit){
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httpsinit();
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didinit = 1;
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}
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ctx = SSL_CTX_new(SSLv23_client_method());
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sbio = BIO_new_ssl_connect(ctx);
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BIO_get_ssl(sbio, &ssl);
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SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
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snprint(buf, sizeof buf, "%s:https", host);
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BIO_set_conn_hostname(sbio, buf);
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if(BIO_do_connect(sbio) <= 0 || BIO_do_handshake(sbio) <= 0){
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ERR_error_string_n(ERR_get_error(), buf, sizeof buf);
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BIO_free_all(sbio);
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werrstr("openssl: %s", buf);
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return nil;
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}
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pfd = emalloc(sizeof *pfd);
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pfd->sbio = sbio;
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return pfd;
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}
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static void
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opensslclose(Pfd *pfd)
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{
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if(pfd == nil)
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return;
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BIO_free_all(pfd->sbio);
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free(pfd);
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}
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static int
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opensslwrite(Pfd *pfd, void *v, int n)
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{
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int m, total;
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char *p;
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p = v;
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total = 0;
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while(total < n){
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if((m = BIO_write(pfd->sbio, p+total, n-total)) <= 0){
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if(total == 0)
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return m;
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return total;
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}
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total += m;
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}
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return total;
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}
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static int
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opensslread(Pfd *pfd, void *v, int n)
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{
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return BIO_read(pfd->sbio, v, n);
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}
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Protocol https =
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{
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opensslconnect,
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opensslread,
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opensslwrite,
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opensslclose
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};
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