diff options
Diffstat (limited to 'libtomcrypt/src/encauth/chachapoly')
9 files changed, 527 insertions, 0 deletions
diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_add_aad.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_add_aad.c new file mode 100644 index 0000000..0c0cf9d --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_add_aad.c @@ -0,0 +1,38 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Add AAD to the ChaCha20Poly1305 state + @param st The ChaCha20Poly1305 state + @param in The additional authentication data to add to the ChaCha20Poly1305 state + @param inlen The length of the ChaCha20Poly1305 data. + @return CRYPT_OK on success + */ +int chacha20poly1305_add_aad(chacha20poly1305_state *st, const unsigned char *in, unsigned long inlen) +{ + int err; + + if (inlen == 0) return CRYPT_OK; /* nothing to do */ + LTC_ARGCHK(st != NULL); + + if (st->aadflg == 0) return CRYPT_ERROR; + if ((err = poly1305_process(&st->poly, in, inlen)) != CRYPT_OK) return err; + st->aadlen += (ulong64)inlen; + return CRYPT_OK; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_decrypt.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_decrypt.c new file mode 100644 index 0000000..1797932 --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_decrypt.c @@ -0,0 +1,49 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Decrypt bytes of ciphertext with ChaCha20Poly1305 + @param st The ChaCha20Poly1305 state + @param in The ciphertext + @param inlen The length of the input (octets) + @param out [out] The plaintext (length inlen) + @return CRYPT_OK if successful +*/ +int chacha20poly1305_decrypt(chacha20poly1305_state *st, const unsigned char *in, unsigned long inlen, unsigned char *out) +{ + unsigned char padzero[16] = { 0 }; + unsigned long padlen; + int err; + + if (inlen == 0) return CRYPT_OK; /* nothing to do */ + LTC_ARGCHK(st != NULL); + + if (st->aadflg) { + padlen = 16 - (unsigned long)(st->aadlen % 16); + if (padlen < 16) { + if ((err = poly1305_process(&st->poly, padzero, padlen)) != CRYPT_OK) return err; + } + st->aadflg = 0; /* no more AAD */ + } + if (st->aadflg) st->aadflg = 0; /* no more AAD */ + if ((err = poly1305_process(&st->poly, in, inlen)) != CRYPT_OK) return err; + if ((err = chacha_crypt(&st->chacha, in, inlen, out)) != CRYPT_OK) return err; + st->ctlen += (ulong64)inlen; + return CRYPT_OK; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_done.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_done.c new file mode 100644 index 0000000..127a7f0 --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_done.c @@ -0,0 +1,46 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Terminate a ChaCha20Poly1305 stream + @param st The ChaCha20Poly1305 state + @param tag [out] The destination for the MAC tag + @param taglen [in/out] The length of the MAC tag + @return CRYPT_OK on success + */ +int chacha20poly1305_done(chacha20poly1305_state *st, unsigned char *tag, unsigned long *taglen) +{ + unsigned char padzero[16] = { 0 }; + unsigned long padlen; + unsigned char buf[16]; + int err; + + LTC_ARGCHK(st != NULL); + + padlen = 16 - (unsigned long)(st->ctlen % 16); + if (padlen < 16) { + if ((err = poly1305_process(&st->poly, padzero, padlen)) != CRYPT_OK) return err; + } + STORE64L(st->aadlen, buf); + STORE64L(st->ctlen, buf + 8); + if ((err = poly1305_process(&st->poly, buf, 16)) != CRYPT_OK) return err; + if ((err = poly1305_done(&st->poly, tag, taglen)) != CRYPT_OK) return err; + if ((err = chacha_done(&st->chacha)) != CRYPT_OK) return err; + return CRYPT_OK; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_encrypt.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_encrypt.c new file mode 100644 index 0000000..c53c4a6 --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_encrypt.c @@ -0,0 +1,48 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Encrypt bytes of ciphertext with ChaCha20Poly1305 + @param st The ChaCha20Poly1305 state + @param in The plaintext + @param inlen The length of the input (octets) + @param out [out] The ciphertext (length inlen) + @return CRYPT_OK if successful +*/ +int chacha20poly1305_encrypt(chacha20poly1305_state *st, const unsigned char *in, unsigned long inlen, unsigned char *out) +{ + unsigned char padzero[16] = { 0 }; + unsigned long padlen; + int err; + + if (inlen == 0) return CRYPT_OK; /* nothing to do */ + LTC_ARGCHK(st != NULL); + + if ((err = chacha_crypt(&st->chacha, in, inlen, out)) != CRYPT_OK) return err; + if (st->aadflg) { + padlen = 16 - (unsigned long)(st->aadlen % 16); + if (padlen < 16) { + if ((err = poly1305_process(&st->poly, padzero, padlen)) != CRYPT_OK) return err; + } + st->aadflg = 0; /* no more AAD */ + } + if ((err = poly1305_process(&st->poly, out, inlen)) != CRYPT_OK) return err; + st->ctlen += (ulong64)inlen; + return CRYPT_OK; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_init.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_init.c new file mode 100644 index 0000000..2799e98 --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_init.c @@ -0,0 +1,30 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Initialize an ChaCha20Poly1305 context (only the key) + @param st [out] The destination of the ChaCha20Poly1305 state + @param key The secret key + @param keylen The length of the secret key (octets) + @return CRYPT_OK if successful +*/ +int chacha20poly1305_init(chacha20poly1305_state *st, const unsigned char *key, unsigned long keylen) +{ + return chacha_setup(&st->chacha, key, keylen, 20); +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_memory.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_memory.c new file mode 100644 index 0000000..54e2011 --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_memory.c @@ -0,0 +1,74 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Process an entire GCM packet in one call. + @param key The secret key + @param keylen The length of the secret key + @param iv The initialization vector + @param ivlen The length of the initialization vector + @param aad The additional authentication data (header) + @param aadlen The length of the aad + @param in The plaintext + @param inlen The length of the plaintext (ciphertext length is the same) + @param out The ciphertext + @param tag [out] The MAC tag + @param taglen [in/out] The MAC tag length + @param direction Encrypt or Decrypt mode (CHACHA20POLY1305_ENCRYPT or CHACHA20POLY1305_DECRYPT) + @return CRYPT_OK on success + */ +int chacha20poly1305_memory(const unsigned char *key, unsigned long keylen, + const unsigned char *iv, unsigned long ivlen, + const unsigned char *aad, unsigned long aadlen, + const unsigned char *in, unsigned long inlen, + unsigned char *out, + unsigned char *tag, unsigned long *taglen, + int direction) +{ + chacha20poly1305_state st; + int err; + + LTC_ARGCHK(key != NULL); + LTC_ARGCHK(iv != NULL); + LTC_ARGCHK(in != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(tag != NULL); + + if ((err = chacha20poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } + if ((err = chacha20poly1305_setiv(&st, iv, ivlen)) != CRYPT_OK) { goto LBL_ERR; } + if (aad && aadlen > 0) { + if ((err = chacha20poly1305_add_aad(&st, aad, aadlen)) != CRYPT_OK) { goto LBL_ERR; } + } + if (direction == CHACHA20POLY1305_ENCRYPT) { + if ((err = chacha20poly1305_encrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; } + } + else if (direction == CHACHA20POLY1305_DECRYPT) { + if ((err = chacha20poly1305_decrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; } + } + else { + err = CRYPT_INVALID_ARG; + goto LBL_ERR; + } + err = chacha20poly1305_done(&st, tag, taglen); +LBL_ERR: +#ifdef LTC_CLEAN_STACK + zeromem(&st, sizeof(chacha20poly1305_state)); +#endif + return err; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_setiv.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_setiv.c new file mode 100644 index 0000000..b87666e --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_setiv.c @@ -0,0 +1,68 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Set IV + counter data to the ChaCha20Poly1305 state and reset the context + @param st The ChaCha20Poly1305 state + @param iv The IV data to add + @param ivlen The length of the IV (must be 12 or 8) + @return CRYPT_OK on success + */ +int chacha20poly1305_setiv(chacha20poly1305_state *st, const unsigned char *iv, unsigned long ivlen) +{ + chacha_state tmp_st; + int i, err; + unsigned char polykey[32]; + + LTC_ARGCHK(st != NULL); + LTC_ARGCHK(iv != NULL); + LTC_ARGCHK(ivlen == 12 || ivlen == 8); + + /* set IV for chacha20 */ + if (ivlen == 12) { + /* IV 96bit */ + if ((err = chacha_ivctr32(&st->chacha, iv, ivlen, 1)) != CRYPT_OK) return err; + } + else { + /* IV 64bit */ + if ((err = chacha_ivctr64(&st->chacha, iv, ivlen, 1)) != CRYPT_OK) return err; + } + + /* copy chacha20 key to temporary state */ + for(i = 0; i < 12; i++) tmp_st.input[i] = st->chacha.input[i]; + tmp_st.rounds = 20; + /* set IV */ + if (ivlen == 12) { + /* IV 32bit */ + if ((err = chacha_ivctr32(&tmp_st, iv, ivlen, 0)) != CRYPT_OK) return err; + } + else { + /* IV 64bit */ + if ((err = chacha_ivctr64(&tmp_st, iv, ivlen, 0)) != CRYPT_OK) return err; + } + /* (re)generate new poly1305 key */ + if ((err = chacha_keystream(&tmp_st, polykey, 32)) != CRYPT_OK) return err; + /* (re)initialise poly1305 */ + if ((err = poly1305_init(&st->poly, polykey, 32)) != CRYPT_OK) return err; + st->ctlen = 0; + st->aadlen = 0; + st->aadflg = 1; + + return CRYPT_OK; +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_setiv_rfc7905.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_setiv_rfc7905.c new file mode 100644 index 0000000..7136a1e --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_setiv_rfc7905.c @@ -0,0 +1,40 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +/** + Set IV + counter data (with RFC7905-magic) to the ChaCha20Poly1305 state and reset the context + @param st The ChaCha20Poly1305 state + @param iv The IV data to add + @param ivlen The length of the IV (must be 12 or 8) + @param sequence_number 64bit sequence number which is incorporated into IV as described in RFC7905 + @return CRYPT_OK on success + */ +int chacha20poly1305_setiv_rfc7905(chacha20poly1305_state *st, const unsigned char *iv, unsigned long ivlen, ulong64 sequence_number) +{ + int i; + unsigned char combined_iv[12] = { 0 }; + + LTC_ARGCHK(st != NULL); + LTC_ARGCHK(iv != NULL); + LTC_ARGCHK(ivlen == 12); + + STORE64L(sequence_number, combined_iv + 4); + for (i = 0; i < 12; i++) combined_iv[i] = iv[i] ^ combined_iv[i]; + return chacha20poly1305_setiv(st, combined_iv, 12); +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ diff --git a/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_test.c b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_test.c new file mode 100644 index 0000000..2ba88dd --- /dev/null +++ b/libtomcrypt/src/encauth/chachapoly/chacha20poly1305_test.c @@ -0,0 +1,134 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ + +#include "tomcrypt.h" + +#ifdef LTC_CHACHA20POLY1305_MODE + +int chacha20poly1305_test(void) +{ +#ifndef LTC_TEST + return CRYPT_NOP; +#else + chacha20poly1305_state st1, st2; + unsigned char k[] = { 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 }; + unsigned char i12[] = { 0x07, 0x00, 0x00, 0x00, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47 }; + unsigned char i8[] = { 0x07, 0x00, 0x00, 0x00, 0x40, 0x41, 0x42, 0x43 }; + unsigned char aad[] = { 0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7 }; + unsigned char enc[] = { 0xD3, 0x1A, 0x8D, 0x34, 0x64, 0x8E, 0x60, 0xDB, 0x7B, 0x86, 0xAF, 0xBC, 0x53, 0xEF, 0x7E, 0xC2, + 0xA4, 0xAD, 0xED, 0x51, 0x29, 0x6E, 0x08, 0xFE, 0xA9, 0xE2, 0xB5, 0xA7, 0x36, 0xEE, 0x62, 0xD6, + 0x3D, 0xBE, 0xA4, 0x5E, 0x8C, 0xA9, 0x67, 0x12, 0x82, 0xFA, 0xFB, 0x69, 0xDA, 0x92, 0x72, 0x8B, + 0x1A, 0x71, 0xDE, 0x0A, 0x9E, 0x06, 0x0B, 0x29, 0x05, 0xD6, 0xA5, 0xB6, 0x7E, 0xCD, 0x3B, 0x36, + 0x92, 0xDD, 0xBD, 0x7F, 0x2D, 0x77, 0x8B, 0x8C, 0x98, 0x03, 0xAE, 0xE3, 0x28, 0x09, 0x1B, 0x58, + 0xFA, 0xB3, 0x24, 0xE4, 0xFA, 0xD6, 0x75, 0x94, 0x55, 0x85, 0x80, 0x8B, 0x48, 0x31, 0xD7, 0xBC, + 0x3F, 0xF4, 0xDE, 0xF0, 0x8E, 0x4B, 0x7A, 0x9D, 0xE5, 0x76, 0xD2, 0x65, 0x86, 0xCE, 0xC6, 0x4B, + 0x61, 0x16 }; + unsigned char tag[] = { 0x1A, 0xE1, 0x0B, 0x59, 0x4F, 0x09, 0xE2, 0x6A, 0x7E, 0x90, 0x2E, 0xCB, 0xD0, 0x60, 0x06, 0x91 }; + char m[] = "Ladies and Gentlemen of the class of '99: If I could offer you only one tip for the future, sunscreen would be it."; + unsigned long mlen = strlen(m); + unsigned long len; + unsigned char rfc7905_pt[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F }; + unsigned char rfc7905_enc[] = { 0xE4, 0x62, 0x85, 0xB4, 0x29, 0x95, 0x34, 0x96, 0xAB, 0xFB, 0x67, 0xCD, 0xAE, 0xAC, 0x94, 0x1E }; + unsigned char rfc7905_tag[] = { 0x16, 0x2C, 0x92, 0x48, 0x2A, 0xDB, 0xD3, 0x5D, 0x48, 0xBE, 0xC6, 0xFF, 0x10, 0x9C, 0xBA, 0xE4 }; + unsigned char ct[1000], pt[1000], emac[16], dmac[16]; + int err; + + /* encrypt IV 96bit */ + if ((err = chacha20poly1305_init(&st1, k, sizeof(k))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_setiv(&st1, i12, sizeof(i12))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_add_aad(&st1, aad, sizeof(aad))) != CRYPT_OK) return err; + /* encrypt piece by piece */ + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m, 25, ct)) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m + 25, 10, ct + 25)) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m + 35, 35, ct + 35)) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m + 70, 5, ct + 70)) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m + 75, 5, ct + 75)) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m + 80, mlen - 80, ct + 80)) != CRYPT_OK) return err; + len = sizeof(emac); + if ((err = chacha20poly1305_done(&st1, emac, &len)) != CRYPT_OK) return err; + + if (compare_testvector(ct, mlen, enc, sizeof(enc), "ENC-CT", 1) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(emac, len, tag, sizeof(tag), "ENC-TAG", 2) != 0) return CRYPT_FAIL_TESTVECTOR; + + /* decrypt IV 96bit */ + if ((err = chacha20poly1305_init(&st2, k, sizeof(k))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_setiv(&st2, i12, sizeof(i12))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_add_aad(&st2, aad, sizeof(aad))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_decrypt(&st2, ct, 21, pt)) != CRYPT_OK) return err; + if ((err = chacha20poly1305_decrypt(&st2, ct + 21, mlen - 21, pt + 21)) != CRYPT_OK) return err; + len = sizeof(dmac); + if ((err = chacha20poly1305_done(&st2, dmac, &len)) != CRYPT_OK) return err; + + if (compare_testvector(pt, mlen, m, mlen, "DEC-PT", 3) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(dmac, len, tag, sizeof(tag), "DEC-TAG", 4) != 0) return CRYPT_FAIL_TESTVECTOR; + + /* chacha20poly1305_memory - encrypt */ + len = sizeof(emac); + if ((err = chacha20poly1305_memory(k, sizeof(k), i12, sizeof(i12), aad, sizeof(aad), (unsigned char *)m, + mlen, ct, emac, &len, CHACHA20POLY1305_ENCRYPT)) != CRYPT_OK) return err; + if (compare_testvector(ct, mlen, enc, sizeof(enc), "ENC-CT2", 1) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(emac, len, tag, sizeof(tag), "ENC-TAG2", 2) != 0) return CRYPT_FAIL_TESTVECTOR; + + /* chacha20poly1305_memory - decrypt */ + len = sizeof(dmac); + if ((err = chacha20poly1305_memory(k, sizeof(k), i12, sizeof(i12), aad, sizeof(aad), + ct, mlen, pt, dmac, &len, CHACHA20POLY1305_DECRYPT)) != CRYPT_OK) return err; + if (compare_testvector(pt, mlen, m, mlen, "DEC-PT2", 3) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(dmac, len, tag, sizeof(tag), "DEC-TAG2", 4) != 0) return CRYPT_FAIL_TESTVECTOR; + + /* encrypt - rfc7905 */ + if ((err = chacha20poly1305_init(&st1, k, sizeof(k))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_setiv_rfc7905(&st1, i12, sizeof(i12), CONST64(0x1122334455667788))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_add_aad(&st1, aad, sizeof(aad))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, rfc7905_pt, 16, ct)) != CRYPT_OK) return err; + len = sizeof(emac); + if ((err = chacha20poly1305_done(&st1, emac, &len)) != CRYPT_OK) return err; + + if (compare_testvector(ct, 16, rfc7905_enc, 16, "ENC-CT3", 1) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(emac, len, rfc7905_tag, 16, "ENC-TAG3", 2) != 0) return CRYPT_FAIL_TESTVECTOR; + + /* decrypt - rfc7905 */ + if ((err = chacha20poly1305_init(&st1, k, sizeof(k))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_setiv_rfc7905(&st1, i12, sizeof(i12), CONST64(0x1122334455667788))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_add_aad(&st1, aad, sizeof(aad))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_decrypt(&st1, ct, 16, pt)) != CRYPT_OK) return err; + len = sizeof(dmac); + if ((err = chacha20poly1305_done(&st1, dmac, &len)) != CRYPT_OK) return err; + + if (compare_testvector(pt, 16, rfc7905_pt, 16, "DEC-CT3", 1) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(dmac, len, rfc7905_tag, 16, "DEC-TAG3", 2) != 0) return CRYPT_FAIL_TESTVECTOR; + + /* encrypt IV 64bit */ + if ((err = chacha20poly1305_init(&st1, k, sizeof(k))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_setiv(&st1, i8, sizeof(i8))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_add_aad(&st1, aad, sizeof(aad))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_encrypt(&st1, (unsigned char *)m, mlen, ct)) != CRYPT_OK) return err; + len = sizeof(emac); + if ((err = chacha20poly1305_done(&st1, emac, &len)) != CRYPT_OK) return err; + + /* decrypt IV 64bit */ + if ((err = chacha20poly1305_init(&st2, k, sizeof(k))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_setiv(&st2, i8, sizeof(i8))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_add_aad(&st2, aad, sizeof(aad))) != CRYPT_OK) return err; + if ((err = chacha20poly1305_decrypt(&st2, ct, mlen, pt)) != CRYPT_OK) return err; + len = sizeof(dmac); + if ((err = chacha20poly1305_done(&st2, dmac, &len)) != CRYPT_OK) return err; + + if (compare_testvector(pt, mlen, m, mlen, "DEC-PT4", 1) != 0) return CRYPT_FAIL_TESTVECTOR; + if (compare_testvector(dmac, len, emac, len, "DEC-TAG4", 2) != 0) return CRYPT_FAIL_TESTVECTOR; + + return CRYPT_OK; +#endif +} + +#endif + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */ |