From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Thu, 29 Dec 2022 16:48:01 +0000 (+0000)
Subject: add cross-compiled test of xchacha20 suitable for running under pypowersim
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0f94fa9ba36d6ebdb1b8cb2e0bbf31f2032ff563;p=openpower-isa.git

add cross-compiled test of xchacha20 suitable for running under pypowersim
---

diff --git a/crypto/chacha20/Makefile.cross b/crypto/chacha20/Makefile.cross
new file mode 100755
index 00000000..9ff32d29
--- /dev/null
+++ b/crypto/chacha20/Makefile.cross
@@ -0,0 +1,39 @@
+.PHONY: all # tests
+
+CROSS ?= powerpc64le-linux-gnu-
+AS = $(CROSS)as
+CC = $(CROSS)gcc
+LD = $(CROSS)ld
+OBJCOPY = $(CROSS)objcopy
+CFLAGS = -O3 -Wall -Wextra
+
+AFLAGS ?= -mpwr9
+
+SRCDIR = src
+
+SOURCES := $(SRCDIR)/xchacha20.c $(SRCDIR)/svp64test.c
+OBJECTS := $(SOURCES:$(SRCDIR)/%.c=$(SRCDIR)/%.o)
+
+OBJ = chacha20test.bin
+
+export DUMP = /tmp/out
+
+# commented for luke's convenience
+#export SILENCELOG = 1
+
+all: tests
+
+$(OBJECTS): $(SRCDIR)/%.o : $(SRCDIR)/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+#pysvp64asm $< $<.sv
+#$(AS) $(AFLAGS) -c $<.sv -le -o $<.o
+chacha20test.bin: $(OBJECTS)
+	$(LD) $(OBJECTS) -EL -o $<.elf -T memmap
+	$(OBJCOPY) $<.elf -I elf64-little -O binary $@
+
+tests: $(OBJ) 
+	@echo chacha20
+	ls -altr chacha20.sh
+	./chacha20.sh $$i $$DUMP$$i || exit 1;
+
diff --git a/crypto/chacha20/chacha20.gpr b/crypto/chacha20/chacha20.gpr
new file mode 100644
index 00000000..7b3a8c42
--- /dev/null
+++ b/crypto/chacha20/chacha20.gpr
@@ -0,0 +1,9 @@
+# void ff_mpadsp_apply_window_float(float *synth_buf, float *window,
+#                                  int *dither_state, float *samples,
+#                                  ptrdiff_t incr);
+1: 0x8000        # stack pointer
+3: 0x600000      # param 1: float *sunth_buf     buf
+4: 0x700000      # param 2: float *window        win
+5: 0x800000      # param 3: int *dither_state    &unused
+6: 0x900000      # param 3: float *samples       out
+7: 1             # param 5: ptr_diff_t incr      1
diff --git a/crypto/chacha20/chacha20.sh b/crypto/chacha20/chacha20.sh
new file mode 100755
index 00000000..4e8419af
--- /dev/null
+++ b/crypto/chacha20/chacha20.sh
@@ -0,0 +1,11 @@
+#!/bin/sh -xe
+
+#-l data/audio/mp3/mp3_0_data/buf${1}:0x600000 \
+#-l data/audio/mp3/mp3_0_data/win0:0x700000 \
+
+pypowersim -g chacha20.gpr \
+	-s common.spr \
+	-p 0x20000000 \
+	-d ${2}:0x900000:128 \
+	-i chacha20test.bin
+#cmp ${2} data/audio/mp3/mp3_0_data/samples${1}
diff --git a/crypto/chacha20/common.spr b/crypto/chacha20/common.spr
new file mode 100644
index 00000000..0a615d76
--- /dev/null
+++ b/crypto/chacha20/common.spr
@@ -0,0 +1 @@
+LR: 0xffffffff
diff --git a/crypto/chacha20/memmap b/crypto/chacha20/memmap
new file mode 100644
index 00000000..052ccb0c
--- /dev/null
+++ b/crypto/chacha20/memmap
@@ -0,0 +1,11 @@
+
+MEMORY
+{
+    ram  : ORIGIN = 0x20000000, LENGTH = 512M
+}
+
+SECTIONS
+{
+   .text : { *(.text*) } > ram
+   .bss  : { *(.text*) } > ram
+}
diff --git a/crypto/chacha20/src/svp64test.c b/crypto/chacha20/src/svp64test.c
new file mode 100644
index 00000000..88402b86
--- /dev/null
+++ b/crypto/chacha20/src/svp64test.c
@@ -0,0 +1,80 @@
+/*************************************************************************
+ * This is a simple program to calculate test vectors and compare them   *
+ * to known good values for XChaCha20.
+ *************************************************************************/
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include "xchacha20.h"
+
+/* implementation of memset to stop complaining */
+void *memset(void *s, int c,  size_t len)
+{
+    unsigned char* p=s;
+    while(len--)
+    {
+        *p++ = (unsigned char)c;
+    }
+    return s;
+}
+
+/** Compare our output to the output of a known good XChaCha20 library.
+ * The test vectors used here are from examples given of the Crypto++
+ * cryptographic library's XChaCha20 examples. These values can be
+ * found here:
+ * https://www.cryptopp.com/wiki/XChaCha20
+ * @returns 0 on success, -1 on failure or error
+ *
+ */
+int check_cpp(void){
+	XChaCha_ctx ctx;
+	uint8_t buffer[128];
+	uint8_t counter[8] = {0x1};
+
+	/* Test values from Crypto++ documentation */
+	uint8_t key[] = {
+			0x5E, 0xC5, 0x8B, 0x6D, 0x51, 0x4F, 0xE0, 0xA5,
+			0x6F, 0x1E, 0x0D, 0xEA, 0x7B, 0xDC, 0x09, 0x5A,
+			0x10, 0xF5, 0xB6, 0x18, 0xBD, 0xB6, 0xF2, 0x26,
+			0x2F, 0xCC, 0x59, 0x7B, 0xB2, 0x30, 0xB3, 0xEF
+	};
+
+	uint8_t iv[] = {
+			0xA3, 0x45, 0xF5, 0xCF, 0x80, 0x23, 0x51, 0x7C,
+			0xC0, 0xFC, 0xF0, 0x75, 0x74, 0x8C, 0x86, 0x5F,
+			0x7D, 0xE8, 0xCA, 0x0C, 0x72, 0x36, 0xAB, 0xDA
+	};
+
+	uint8_t correct_ciphertext[] = {
+			0xEE, 0xA7, 0xC2, 0x71, 0x19, 0x10, 0x65, 0x69,
+			0x92, 0xE1, 0xCE, 0xD8, 0x16, 0xE2, 0x0E, 0x62,
+			0x1B, 0x25, 0x17, 0x82, 0x36, 0x71, 0x6A, 0xE4,
+			0x99, 0xF2, 0x97, 0x37, 0xA7, 0x2A, 0xFC, 0xF8,
+			0x6C, 0x72
+	};
+
+    // annoying: this is not word-aligned.
+	uint8_t plaintext[] = "My Plaintext!! My Dear plaintext!!!";
+	uint32_t msglen = strlen((char *)plaintext);
+
+    plaintext[msglen-1] = 0;
+
+	xchacha_keysetup(&ctx, key, iv);
+
+	/* Crypto++ initializes their counter to 1 instead of 0 */
+	xchacha_set_counter(&ctx, counter);
+	xchacha_encrypt_bytes(&ctx, plaintext, buffer, msglen);
+
+	/* Compare our ciphertext to the correct ciphertext */
+	if(memcmp(buffer, correct_ciphertext, msglen) != 0){
+		return(-1);
+	}
+
+	return(0);
+}
+
+int main(void){
+	return check_cpp();
+}