--- /dev/null
+/*
+ * Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define BR_POWER_ASM_MACROS 1
+#include "inner.h"
+
+#if BR_POWER8
+
+/* see bearssl_block.h */
+void
+br_aes_pwr8_ctr_init(br_aes_pwr8_ctr_keys *ctx,
+ const void *key, size_t len)
+{
+ ctx->vtable = &br_aes_pwr8_ctr_vtable;
+ ctx->num_rounds = br_aes_pwr8_keysched(ctx->skey.skni, key, len);
+}
+
+static void
+ctr_128(const unsigned char *sk, const unsigned char *ivbuf,
+ unsigned char *buf, size_t num_blocks)
+{
+ long cc0, cc1, cc2, cc3;
+
+#if BR_POWER8_LE
+ static const uint32_t idx2be[] = {
+ 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C
+ };
+#endif
+ static const uint32_t ctrinc[] = {
+ 0, 0, 0, 4
+ };
+
+ cc0 = 0;
+ cc1 = 16;
+ cc2 = 32;
+ cc3 = 48;
+ asm volatile (
+
+ /*
+ * Load subkeys into v0..v10
+ */
+ lxvw4x(32, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(33, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(34, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(35, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(36, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(37, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(38, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(39, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(40, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(41, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(42, %[cc0], %[sk])
+ li(%[cc0], 0)
+
+#if BR_POWER8_LE
+ /*
+ * v15 = constant for byteswapping words
+ */
+ lxvw4x(47, 0, %[idx2be])
+#endif
+ /*
+ * v28 = increment for IV counter.
+ */
+ lxvw4x(60, 0, %[ctrinc])
+
+ /*
+ * Load IV into v16..v19
+ */
+ lxvw4x(48, %[cc0], %[ivbuf])
+ lxvw4x(49, %[cc1], %[ivbuf])
+ lxvw4x(50, %[cc2], %[ivbuf])
+ lxvw4x(51, %[cc3], %[ivbuf])
+#if BR_POWER8_LE
+ vperm(16, 16, 16, 15)
+ vperm(17, 17, 17, 15)
+ vperm(18, 18, 18, 15)
+ vperm(19, 19, 19, 15)
+#endif
+
+ mtctr(%[num_blocks])
+ label(loop)
+ /*
+ * Compute next IV into v24..v27
+ */
+ vadduwm(24, 16, 28)
+ vadduwm(25, 17, 28)
+ vadduwm(26, 18, 28)
+ vadduwm(27, 19, 28)
+
+ /*
+ * Load next data blocks. We do this early on but we
+ * won't need them until IV encryption is done.
+ */
+ lxvw4x(52, %[cc0], %[buf])
+ lxvw4x(53, %[cc1], %[buf])
+ lxvw4x(54, %[cc2], %[buf])
+ lxvw4x(55, %[cc3], %[buf])
+
+ /*
+ * Encrypt the current IV.
+ */
+ vxor(16, 16, 0)
+ vxor(17, 17, 0)
+ vxor(18, 18, 0)
+ vxor(19, 19, 0)
+ vcipher(16, 16, 1)
+ vcipher(17, 17, 1)
+ vcipher(18, 18, 1)
+ vcipher(19, 19, 1)
+ vcipher(16, 16, 2)
+ vcipher(17, 17, 2)
+ vcipher(18, 18, 2)
+ vcipher(19, 19, 2)
+ vcipher(16, 16, 3)
+ vcipher(17, 17, 3)
+ vcipher(18, 18, 3)
+ vcipher(19, 19, 3)
+ vcipher(16, 16, 4)
+ vcipher(17, 17, 4)
+ vcipher(18, 18, 4)
+ vcipher(19, 19, 4)
+ vcipher(16, 16, 5)
+ vcipher(17, 17, 5)
+ vcipher(18, 18, 5)
+ vcipher(19, 19, 5)
+ vcipher(16, 16, 6)
+ vcipher(17, 17, 6)
+ vcipher(18, 18, 6)
+ vcipher(19, 19, 6)
+ vcipher(16, 16, 7)
+ vcipher(17, 17, 7)
+ vcipher(18, 18, 7)
+ vcipher(19, 19, 7)
+ vcipher(16, 16, 8)
+ vcipher(17, 17, 8)
+ vcipher(18, 18, 8)
+ vcipher(19, 19, 8)
+ vcipher(16, 16, 9)
+ vcipher(17, 17, 9)
+ vcipher(18, 18, 9)
+ vcipher(19, 19, 9)
+ vcipherlast(16, 16, 10)
+ vcipherlast(17, 17, 10)
+ vcipherlast(18, 18, 10)
+ vcipherlast(19, 19, 10)
+
+#if BR_POWER8_LE
+ vperm(16, 16, 16, 15)
+ vperm(17, 17, 17, 15)
+ vperm(18, 18, 18, 15)
+ vperm(19, 19, 19, 15)
+#endif
+
+ /*
+ * Load next plaintext word and XOR with encrypted IV.
+ */
+ vxor(16, 20, 16)
+ vxor(17, 21, 17)
+ vxor(18, 22, 18)
+ vxor(19, 23, 19)
+ stxvw4x(48, %[cc0], %[buf])
+ stxvw4x(49, %[cc1], %[buf])
+ stxvw4x(50, %[cc2], %[buf])
+ stxvw4x(51, %[cc3], %[buf])
+
+ addi(%[buf], %[buf], 64)
+
+ /*
+ * Update IV.
+ */
+ vand(16, 24, 24)
+ vand(17, 25, 25)
+ vand(18, 26, 26)
+ vand(19, 27, 27)
+
+ bdnz(loop)
+
+: [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3),
+ [buf] "+b" (buf)
+: [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2),
+ [ctrinc] "b" (ctrinc)
+#if BR_POWER8_LE
+ , [idx2be] "b" (idx2be)
+#endif
+: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
+ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19",
+ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29",
+ "ctr", "memory"
+ );
+}
+
+static void
+ctr_192(const unsigned char *sk, const unsigned char *ivbuf,
+ unsigned char *buf, size_t num_blocks)
+{
+ long cc0, cc1, cc2, cc3;
+
+#if BR_POWER8_LE
+ static const uint32_t idx2be[] = {
+ 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C
+ };
+#endif
+ static const uint32_t ctrinc[] = {
+ 0, 0, 0, 4
+ };
+
+ cc0 = 0;
+ cc1 = 16;
+ cc2 = 32;
+ cc3 = 48;
+ asm volatile (
+
+ /*
+ * Load subkeys into v0..v12
+ */
+ lxvw4x(32, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(33, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(34, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(35, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(36, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(37, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(38, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(39, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(40, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(41, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(42, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(43, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(44, %[cc0], %[sk])
+ li(%[cc0], 0)
+
+#if BR_POWER8_LE
+ /*
+ * v15 = constant for byteswapping words
+ */
+ lxvw4x(47, 0, %[idx2be])
+#endif
+ /*
+ * v28 = increment for IV counter.
+ */
+ lxvw4x(60, 0, %[ctrinc])
+
+ /*
+ * Load IV into v16..v19
+ */
+ lxvw4x(48, %[cc0], %[ivbuf])
+ lxvw4x(49, %[cc1], %[ivbuf])
+ lxvw4x(50, %[cc2], %[ivbuf])
+ lxvw4x(51, %[cc3], %[ivbuf])
+#if BR_POWER8_LE
+ vperm(16, 16, 16, 15)
+ vperm(17, 17, 17, 15)
+ vperm(18, 18, 18, 15)
+ vperm(19, 19, 19, 15)
+#endif
+
+ mtctr(%[num_blocks])
+ label(loop)
+ /*
+ * Compute next IV into v24..v27
+ */
+ vadduwm(24, 16, 28)
+ vadduwm(25, 17, 28)
+ vadduwm(26, 18, 28)
+ vadduwm(27, 19, 28)
+
+ /*
+ * Load next data blocks. We do this early on but we
+ * won't need them until IV encryption is done.
+ */
+ lxvw4x(52, %[cc0], %[buf])
+ lxvw4x(53, %[cc1], %[buf])
+ lxvw4x(54, %[cc2], %[buf])
+ lxvw4x(55, %[cc3], %[buf])
+
+ /*
+ * Encrypt the current IV.
+ */
+ vxor(16, 16, 0)
+ vxor(17, 17, 0)
+ vxor(18, 18, 0)
+ vxor(19, 19, 0)
+ vcipher(16, 16, 1)
+ vcipher(17, 17, 1)
+ vcipher(18, 18, 1)
+ vcipher(19, 19, 1)
+ vcipher(16, 16, 2)
+ vcipher(17, 17, 2)
+ vcipher(18, 18, 2)
+ vcipher(19, 19, 2)
+ vcipher(16, 16, 3)
+ vcipher(17, 17, 3)
+ vcipher(18, 18, 3)
+ vcipher(19, 19, 3)
+ vcipher(16, 16, 4)
+ vcipher(17, 17, 4)
+ vcipher(18, 18, 4)
+ vcipher(19, 19, 4)
+ vcipher(16, 16, 5)
+ vcipher(17, 17, 5)
+ vcipher(18, 18, 5)
+ vcipher(19, 19, 5)
+ vcipher(16, 16, 6)
+ vcipher(17, 17, 6)
+ vcipher(18, 18, 6)
+ vcipher(19, 19, 6)
+ vcipher(16, 16, 7)
+ vcipher(17, 17, 7)
+ vcipher(18, 18, 7)
+ vcipher(19, 19, 7)
+ vcipher(16, 16, 8)
+ vcipher(17, 17, 8)
+ vcipher(18, 18, 8)
+ vcipher(19, 19, 8)
+ vcipher(16, 16, 9)
+ vcipher(17, 17, 9)
+ vcipher(18, 18, 9)
+ vcipher(19, 19, 9)
+ vcipher(16, 16, 10)
+ vcipher(17, 17, 10)
+ vcipher(18, 18, 10)
+ vcipher(19, 19, 10)
+ vcipher(16, 16, 11)
+ vcipher(17, 17, 11)
+ vcipher(18, 18, 11)
+ vcipher(19, 19, 11)
+ vcipherlast(16, 16, 12)
+ vcipherlast(17, 17, 12)
+ vcipherlast(18, 18, 12)
+ vcipherlast(19, 19, 12)
+
+#if BR_POWER8_LE
+ vperm(16, 16, 16, 15)
+ vperm(17, 17, 17, 15)
+ vperm(18, 18, 18, 15)
+ vperm(19, 19, 19, 15)
+#endif
+
+ /*
+ * Load next plaintext word and XOR with encrypted IV.
+ */
+ vxor(16, 20, 16)
+ vxor(17, 21, 17)
+ vxor(18, 22, 18)
+ vxor(19, 23, 19)
+ stxvw4x(48, %[cc0], %[buf])
+ stxvw4x(49, %[cc1], %[buf])
+ stxvw4x(50, %[cc2], %[buf])
+ stxvw4x(51, %[cc3], %[buf])
+
+ addi(%[buf], %[buf], 64)
+
+ /*
+ * Update IV.
+ */
+ vand(16, 24, 24)
+ vand(17, 25, 25)
+ vand(18, 26, 26)
+ vand(19, 27, 27)
+
+ bdnz(loop)
+
+: [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3),
+ [buf] "+b" (buf)
+: [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2),
+ [ctrinc] "b" (ctrinc)
+#if BR_POWER8_LE
+ , [idx2be] "b" (idx2be)
+#endif
+: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
+ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19",
+ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29",
+ "ctr", "memory"
+ );
+}
+
+static void
+ctr_256(const unsigned char *sk, const unsigned char *ivbuf,
+ unsigned char *buf, size_t num_blocks)
+{
+ long cc0, cc1, cc2, cc3;
+
+#if BR_POWER8_LE
+ static const uint32_t idx2be[] = {
+ 0x03020100, 0x07060504, 0x0B0A0908, 0x0F0E0D0C
+ };
+#endif
+ static const uint32_t ctrinc[] = {
+ 0, 0, 0, 4
+ };
+
+ cc0 = 0;
+ cc1 = 16;
+ cc2 = 32;
+ cc3 = 48;
+ asm volatile (
+
+ /*
+ * Load subkeys into v0..v14
+ */
+ lxvw4x(32, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(33, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(34, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(35, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(36, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(37, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(38, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(39, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(40, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(41, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(42, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(43, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(44, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(45, %[cc0], %[sk])
+ addi(%[cc0], %[cc0], 16)
+ lxvw4x(46, %[cc0], %[sk])
+ li(%[cc0], 0)
+
+#if BR_POWER8_LE
+ /*
+ * v15 = constant for byteswapping words
+ */
+ lxvw4x(47, 0, %[idx2be])
+#endif
+ /*
+ * v28 = increment for IV counter.
+ */
+ lxvw4x(60, 0, %[ctrinc])
+
+ /*
+ * Load IV into v16..v19
+ */
+ lxvw4x(48, %[cc0], %[ivbuf])
+ lxvw4x(49, %[cc1], %[ivbuf])
+ lxvw4x(50, %[cc2], %[ivbuf])
+ lxvw4x(51, %[cc3], %[ivbuf])
+#if BR_POWER8_LE
+ vperm(16, 16, 16, 15)
+ vperm(17, 17, 17, 15)
+ vperm(18, 18, 18, 15)
+ vperm(19, 19, 19, 15)
+#endif
+
+ mtctr(%[num_blocks])
+ label(loop)
+ /*
+ * Compute next IV into v24..v27
+ */
+ vadduwm(24, 16, 28)
+ vadduwm(25, 17, 28)
+ vadduwm(26, 18, 28)
+ vadduwm(27, 19, 28)
+
+ /*
+ * Load next data blocks. We do this early on but we
+ * won't need them until IV encryption is done.
+ */
+ lxvw4x(52, %[cc0], %[buf])
+ lxvw4x(53, %[cc1], %[buf])
+ lxvw4x(54, %[cc2], %[buf])
+ lxvw4x(55, %[cc3], %[buf])
+
+ /*
+ * Encrypt the current IV.
+ */
+ vxor(16, 16, 0)
+ vxor(17, 17, 0)
+ vxor(18, 18, 0)
+ vxor(19, 19, 0)
+ vcipher(16, 16, 1)
+ vcipher(17, 17, 1)
+ vcipher(18, 18, 1)
+ vcipher(19, 19, 1)
+ vcipher(16, 16, 2)
+ vcipher(17, 17, 2)
+ vcipher(18, 18, 2)
+ vcipher(19, 19, 2)
+ vcipher(16, 16, 3)
+ vcipher(17, 17, 3)
+ vcipher(18, 18, 3)
+ vcipher(19, 19, 3)
+ vcipher(16, 16, 4)
+ vcipher(17, 17, 4)
+ vcipher(18, 18, 4)
+ vcipher(19, 19, 4)
+ vcipher(16, 16, 5)
+ vcipher(17, 17, 5)
+ vcipher(18, 18, 5)
+ vcipher(19, 19, 5)
+ vcipher(16, 16, 6)
+ vcipher(17, 17, 6)
+ vcipher(18, 18, 6)
+ vcipher(19, 19, 6)
+ vcipher(16, 16, 7)
+ vcipher(17, 17, 7)
+ vcipher(18, 18, 7)
+ vcipher(19, 19, 7)
+ vcipher(16, 16, 8)
+ vcipher(17, 17, 8)
+ vcipher(18, 18, 8)
+ vcipher(19, 19, 8)
+ vcipher(16, 16, 9)
+ vcipher(17, 17, 9)
+ vcipher(18, 18, 9)
+ vcipher(19, 19, 9)
+ vcipher(16, 16, 10)
+ vcipher(17, 17, 10)
+ vcipher(18, 18, 10)
+ vcipher(19, 19, 10)
+ vcipher(16, 16, 11)
+ vcipher(17, 17, 11)
+ vcipher(18, 18, 11)
+ vcipher(19, 19, 11)
+ vcipher(16, 16, 12)
+ vcipher(17, 17, 12)
+ vcipher(18, 18, 12)
+ vcipher(19, 19, 12)
+ vcipher(16, 16, 13)
+ vcipher(17, 17, 13)
+ vcipher(18, 18, 13)
+ vcipher(19, 19, 13)
+ vcipherlast(16, 16, 14)
+ vcipherlast(17, 17, 14)
+ vcipherlast(18, 18, 14)
+ vcipherlast(19, 19, 14)
+
+#if BR_POWER8_LE
+ vperm(16, 16, 16, 15)
+ vperm(17, 17, 17, 15)
+ vperm(18, 18, 18, 15)
+ vperm(19, 19, 19, 15)
+#endif
+
+ /*
+ * Load next plaintext word and XOR with encrypted IV.
+ */
+ vxor(16, 20, 16)
+ vxor(17, 21, 17)
+ vxor(18, 22, 18)
+ vxor(19, 23, 19)
+ stxvw4x(48, %[cc0], %[buf])
+ stxvw4x(49, %[cc1], %[buf])
+ stxvw4x(50, %[cc2], %[buf])
+ stxvw4x(51, %[cc3], %[buf])
+
+ addi(%[buf], %[buf], 64)
+
+ /*
+ * Update IV.
+ */
+ vand(16, 24, 24)
+ vand(17, 25, 25)
+ vand(18, 26, 26)
+ vand(19, 27, 27)
+
+ bdnz(loop)
+
+: [cc0] "+b" (cc0), [cc1] "+b" (cc1), [cc2] "+b" (cc2), [cc3] "+b" (cc3),
+ [buf] "+b" (buf)
+: [sk] "b" (sk), [ivbuf] "b" (ivbuf), [num_blocks] "b" (num_blocks >> 2),
+ [ctrinc] "b" (ctrinc)
+#if BR_POWER8_LE
+ , [idx2be] "b" (idx2be)
+#endif
+: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v8", "v9",
+ "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18", "v19",
+ "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29",
+ "ctr", "memory"
+ );
+}
+
+/* see bearssl_block.h */
+uint32_t
+br_aes_pwr8_ctr_run(const br_aes_pwr8_ctr_keys *ctx,
+ const void *iv, uint32_t cc, void *data, size_t len)
+{
+ unsigned char *buf;
+ unsigned char ivbuf[64];
+
+ buf = data;
+ memcpy(ivbuf + 0, iv, 12);
+ memcpy(ivbuf + 16, iv, 12);
+ memcpy(ivbuf + 32, iv, 12);
+ memcpy(ivbuf + 48, iv, 12);
+ if (len >= 64) {
+ br_enc32be(ivbuf + 12, cc + 0);
+ br_enc32be(ivbuf + 28, cc + 1);
+ br_enc32be(ivbuf + 44, cc + 2);
+ br_enc32be(ivbuf + 60, cc + 3);
+ switch (ctx->num_rounds) {
+ case 10:
+ ctr_128(ctx->skey.skni, ivbuf, buf,
+ (len >> 4) & ~(size_t)3);
+ break;
+ case 12:
+ ctr_192(ctx->skey.skni, ivbuf, buf,
+ (len >> 4) & ~(size_t)3);
+ break;
+ default:
+ ctr_256(ctx->skey.skni, ivbuf, buf,
+ (len >> 4) & ~(size_t)3);
+ break;
+ }
+ cc += (len >> 4) & ~(size_t)3;
+ buf += len & ~(size_t)63;
+ len &= 63;
+ }
+ if (len > 0) {
+ unsigned char tmp[64];
+
+ memcpy(tmp, buf, len);
+ memset(tmp + len, 0, (sizeof tmp) - len);
+ br_enc32be(ivbuf + 12, cc + 0);
+ br_enc32be(ivbuf + 28, cc + 1);
+ br_enc32be(ivbuf + 44, cc + 2);
+ br_enc32be(ivbuf + 60, cc + 3);
+ switch (ctx->num_rounds) {
+ case 10:
+ ctr_128(ctx->skey.skni, ivbuf, tmp, 4);
+ break;
+ case 12:
+ ctr_192(ctx->skey.skni, ivbuf, tmp, 4);
+ break;
+ default:
+ ctr_256(ctx->skey.skni, ivbuf, tmp, 4);
+ break;
+ }
+ memcpy(buf, tmp, len);
+ cc += (len + 15) >> 4;
+ }
+ return cc;
+}
+
+/* see bearssl_block.h */
+const br_block_ctr_class br_aes_pwr8_ctr_vtable = {
+ sizeof(br_aes_pwr8_ctr_keys),
+ 16,
+ 4,
+ (void (*)(const br_block_ctr_class **, const void *, size_t))
+ &br_aes_pwr8_ctr_init,
+ (uint32_t (*)(const br_block_ctr_class *const *,
+ const void *, uint32_t, void *, size_t))
+ &br_aes_pwr8_ctr_run
+};
+
+/* see bearssl_block.h */
+const br_block_ctr_class *
+br_aes_pwr8_ctr_get_vtable(void)
+{
+ return br_aes_pwr8_supported() ? &br_aes_pwr8_ctr_vtable : NULL;
+}
+
+#else
+
+/* see bearssl_block.h */
+const br_block_ctr_class *
+br_aes_pwr8_ctr_get_vtable(void)
+{
+ return NULL;
+}
+
+#endif
projects / BearSSL / blobdiff