/* * Copyright 2023 Vsevolod Stakhov * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "config.h" #include "cryptobox.h" #include "base64.h" #include "platform_config.h" #include "str_util.h" #include "util.h" #include "contrib/libottery/ottery.h" extern unsigned cpu_config; const uint8_t base64_table_dec[256] = { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 254, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255, 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, }; static const char base64_alphabet[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/"; typedef struct base64_impl { unsigned short enabled; unsigned short min_len; unsigned int cpu_flags; const char *desc; int (*decode)(const char *in, size_t inlen, unsigned char *out, size_t *outlen); } base64_impl_t; #define BASE64_DECLARE(ext) \ int base64_decode_##ext(const char *in, size_t inlen, unsigned char *out, size_t *outlen); #define BASE64_IMPL(cpuflags, min_len, desc, ext) \ { \ 0, (min_len), (cpuflags), desc, base64_decode_##ext \ } BASE64_DECLARE(ref); #define BASE64_REF BASE64_IMPL(0, 0, "ref", ref) #ifdef RSPAMD_HAS_TARGET_ATTR #if defined(HAVE_SSE42) && defined(__x86_64__) int base64_decode_sse42(const char *in, size_t inlen, unsigned char *out, size_t *outlen) __attribute__((__target__("sse4.2"))); BASE64_DECLARE(sse42); #define BASE64_SSE42 BASE64_IMPL(CPUID_SSE42, 24, "sse42", sse42) #endif #endif #ifdef RSPAMD_HAS_TARGET_ATTR #if defined(HAVE_AVX2) && defined(__x86_64__) int base64_decode_avx2(const char *in, size_t inlen, unsigned char *out, size_t *outlen) __attribute__((__target__("avx2"))); BASE64_DECLARE(avx2); #define BASE64_AVX2 BASE64_IMPL(CPUID_AVX2, 128, "avx2", avx2) #endif #endif static base64_impl_t base64_list[] = { BASE64_REF, #ifdef BASE64_SSE42 BASE64_SSE42, #endif #ifdef BASE64_AVX2 BASE64_AVX2, #endif }; static const base64_impl_t *base64_ref = &base64_list[0]; const char * base64_load(void) { guint i; const base64_impl_t *opt_impl = base64_ref; /* Enable reference */ base64_list[0].enabled = true; if (cpu_config != 0) { for (i = 1; i < G_N_ELEMENTS(base64_list); i++) { if (base64_list[i].cpu_flags & cpu_config) { base64_list[i].enabled = true; opt_impl = &base64_list[i]; } } } return opt_impl->desc; } gboolean rspamd_cryptobox_base64_decode(const gchar *in, gsize inlen, guchar *out, gsize *outlen) { const base64_impl_t *opt_impl = base64_ref; for (gint i = G_N_ELEMENTS(base64_list) - 1; i > 0; i--) { if (base64_list[i].enabled && base64_list[i].min_len <= inlen) { opt_impl = &base64_list[i]; break; } } return opt_impl->decode(in, inlen, out, outlen); } double base64_test(bool generic, size_t niters, size_t len, size_t str_len) { size_t cycles; guchar *in, *out, *tmp; gdouble t1, t2, total = 0; gsize outlen; g_assert(len > 0); in = g_malloc(len); tmp = g_malloc(len); ottery_rand_bytes(in, len); out = rspamd_encode_base64_fold(in, len, str_len, &outlen, RSPAMD_TASK_NEWLINES_CRLF); if (generic) { base64_list[0].decode(out, outlen, tmp, &len); } else { rspamd_cryptobox_base64_decode(out, outlen, tmp, &len); } g_assert(memcmp(in, tmp, len) == 0); for (cycles = 0; cycles < niters; cycles++) { t1 = rspamd_get_ticks(TRUE); if (generic) { base64_list[0].decode(out, outlen, tmp, &len); } else { rspamd_cryptobox_base64_decode(out, outlen, tmp, &len); } t2 = rspamd_get_ticks(TRUE); total += t2 - t1; } g_free(in); g_free(tmp); g_free(out); return total; } gboolean rspamd_cryptobox_base64_is_valid(const gchar *in, gsize inlen) { const guchar *p, *end; if (inlen == 0) { return FALSE; } p = in; end = in + inlen; while (p < end && *p != '=') { if (!g_ascii_isspace(*p)) { if (base64_table_dec[*p] == 255) { return FALSE; } } p++; } return TRUE; }