#include <u.h>#include <libc.h>#include <libsec.h> static voidprintblock(uchar *b, usize n){	int i; 	for(i=0; i+8<=n; i+=8){		print("%#.2ux %#.2ux %#.2ux %#.2ux %#.2ux %#.2ux %#.2ux %#.2ux\n",			b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);		b += 8;	}	if(i < n){		print("%#.2ux", *b++);		while(++i < n)			print(" %#.2ux", *b++);		print("\n");	}} /* test vector from RFC7539 */uchar	rfckey[] = {	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f};uchar	rfcnonce[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4a, 0x00, 0x00, 0x00, 0x00};u32int	rfccount = 1;char	rfctext[] = "Ladies and Gentlemen of the class of '99: If I could offer you only one tip for the future, "	"sunscreen would be it.";uchar	rfcout[3*ChachaBsize];uchar	rfcref[] = {	0x6e, 0x2e, 0x35, 0x9a, 0x25, 0x68, 0xf9, 0x80, 0x41, 0xba, 0x07, 0x28, 0xdd, 0x0d, 0x69, 0x81,	0xe9, 0x7e, 0x7a, 0xec, 0x1d, 0x43, 0x60, 0xc2, 0x0a, 0x27, 0xaf, 0xcc, 0xfd, 0x9f, 0xae, 0x0b,	0xf9, 0x1b, 0x65, 0xc5, 0x52, 0x47, 0x33, 0xab, 0x8f, 0x59, 0x3d, 0xab, 0xcd, 0x62, 0xb3, 0x57,	0x16, 0x39, 0xd6, 0x24, 0xe6, 0x51, 0x52, 0xab, 0x8f, 0x53, 0x0c, 0x35, 0x9f, 0x08, 0x61, 0xd8,	0x07, 0xca, 0x0d, 0xbf, 0x50, 0x0d, 0x6a, 0x61, 0x56, 0xa3, 0x8e, 0x08, 0x8a, 0x22, 0xb6, 0x5e,	0x52, 0xbc, 0x51, 0x4d, 0x16, 0xcc, 0xf8, 0x06, 0x81, 0x8c, 0xe9, 0x1a, 0xb7, 0x79, 0x37, 0x36,	0x5a, 0xf9, 0x0b, 0xbf, 0x74, 0xa3, 0x5b, 0xe6, 0xb4, 0x0b, 0x8e, 0xed, 0xf2, 0x78, 0x5e, 0x42,	0x87, 0x4d}; uchar	ccpaad[] = {	0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,};uchar	ccpkey[] = {	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,};uchar	ccpiv[] = {	0x07, 0x00, 0x00, 0x00,  	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,};uchar	ccptag[] = {	0x1a, 0xe1, 0x0b, 0x59, 0x4f, 0x09, 0xe2, 0x6a, 0x7e, 0x90, 0x2e, 0xcb, 0xd0, 0x60, 0x06, 0x91,}; uchar	ccp64aad[] = {	0x87, 0xe2, 0x29, 0xd4, 0x50, 0x08, 0x45, 0xa0, 0x79, 0xc0,};uchar	ccp64key[] = {	0x42, 0x90, 0xbc, 0xb1, 0x54, 0x17, 0x35, 0x31, 0xf3, 0x14, 0xaf, 0x57, 0xf3, 0xbe, 0x3b, 0x50,	0x06, 0xda, 0x37, 0x1e, 0xce, 0x27, 0x2a, 0xfa, 0x1b, 0x5d, 0xbd, 0xd1, 0x10, 0x0a, 0x10, 0x07,};uchar	ccp64iv[] = {	0xcd, 0x7c, 0xf6, 0x7b, 0xe3, 0x9c, 0x79, 0x4a,};uchar	ccp64inp[] = {	0x86, 0xd0, 0x99, 0x74, 0x84, 0x0b, 0xde, 0xd2, 0xa5, 0xca, };uchar	ccp64out[] = {	0xe3, 0xe4, 0x46, 0xf7, 0xed, 0xe9, 0xa1, 0x9b, 0x62, 0xa4,};uchar	ccp64tag[] = {	0x67, 0x7d, 0xab, 0xf4, 0xe3, 0xd2, 0x4b, 0x87, 0x6b, 0xb2, 0x84, 0x75, 0x38, 0x96, 0xe1, 0xd6,}; voidmain(int argc, char **argv){	Chachastate s;	uchar tag[16];	int n; 	ARGBEGIN{	}ARGEND	print("rfc7539:\n");	print("key:\n");	printblock(rfckey, sizeof(rfckey));	n = strlen(rfctext);	setupChachastate(&s, rfckey, sizeof(rfckey), rfcnonce, sizeof(rfcnonce), 0);	chacha_setblock(&s, rfccount);	print("rfc in:\n");	printblock((uchar*)rfctext, n);	chacha_encrypt2((uchar*)rfctext, rfcout, n, &s);	print("rfc out:\n");	printblock(rfcout, n);	if(memcmp(rfcout, rfcref, sizeof(rfcref)) != 0){		print("failure of vision\n");		exits("wrong");	}	print("\n"); 	print("ccpoly key:\n");	printblock(ccpkey, sizeof(ccpkey)); 	print("ccpoly iv:\n");	printblock(ccpiv, sizeof(ccpiv)); 	setupChachastate(&s, ccpkey, sizeof(ccpkey), ccpiv, sizeof(ccpiv), 20); 	memmove(rfcout, rfctext, sizeof(rfctext)-1);	ccpoly_encrypt(rfcout, sizeof(rfctext)-1, ccpaad, sizeof(ccpaad), tag, &s); 	print("ccpoly cipher:\n");	printblock(rfcout, sizeof(rfctext)-1); 	print("ccpoly tag:\n");	printblock(tag, sizeof(tag)); 	if(memcmp(tag, ccptag, sizeof(tag)) != 0){		print("bad ccpoly tag\n");		exits("wrong");	} 	if(ccpoly_decrypt(rfcout, sizeof(rfctext)-1, ccpaad, sizeof(ccpaad), tag, &s) != 0){		print("ccpoly decryption failed\n");		exits("wrong");	} 	if(memcmp(rfcout, rfctext, sizeof(rfctext)-1) != 0){		print("ccpoly bad decryption\n");		exits("wrong");	}	print("\n"); 	print("ccpoly64 key:\n");	printblock(ccp64key, sizeof(ccp64key)); 	print("ccpoly64 iv:\n");	printblock(ccp64iv, sizeof(ccp64iv)); 	setupChachastate(&s, ccp64key, sizeof(ccp64key), ccp64iv, sizeof(ccp64iv), 20); 	memmove(rfcout, ccp64inp, sizeof(ccp64inp));	ccpoly_encrypt(rfcout, sizeof(ccp64inp), ccp64aad, sizeof(ccp64aad), tag, &s); 	print("ccpoly64 cipher:\n");	printblock(rfcout, sizeof(ccp64inp)); 	print("ccpoly64 tag:\n");	printblock(tag, sizeof(tag)); 	if(memcmp(rfcout, ccp64out, sizeof(ccp64out)) != 0){		print("ccpoly64 bad ciphertext\n");		exits("wrong");	}	if(memcmp(tag, ccp64tag, sizeof(ccp64tag)) != 0){		print("ccpoly64 bad encryption tag\n");		exits("wrong");	} 	if(ccpoly_decrypt(rfcout, sizeof(ccp64inp), ccp64aad, sizeof(ccp64aad), tag, &s) != 0){		print("ccpoly64 decryption failed\n");		exits("wrong");	}	if(memcmp(rfcout, ccp64inp, sizeof(ccp64inp)) != 0){		print("ccpoly64 bad decryption\n");		exits("wrong");	} 	print("passed\n");	exits(nil);}