diff options
| author | Niels Provos <provos@cvs.openbsd.org> | 1998-08-10 18:41:00 +0000 |
|---|---|---|
| committer | Niels Provos <provos@cvs.openbsd.org> | 1998-08-10 18:41:00 +0000 |
| commit | 66ec51ee42f8c61b0eb31938129a41dfee3c7bf7 (patch) | |
| tree | 42227efe43ff3121dc695aaf2a13e35473f18601 /lib/libc/crypt/blowfish.c | |
| parent | 7182e8c3cebdc3e69c012c12074dcc11f941924d (diff) | |
add ECB and CBC encryption for octet streams
Diffstat (limited to 'lib/libc/crypt/blowfish.c')
| -rw-r--r-- | lib/libc/crypt/blowfish.c | 140 |
1 files changed, 139 insertions, 1 deletions
diff --git a/lib/libc/crypt/blowfish.c b/lib/libc/crypt/blowfish.c index 5ffc634efa5..d9466556245 100644 --- a/lib/libc/crypt/blowfish.c +++ b/lib/libc/crypt/blowfish.c @@ -1,4 +1,4 @@ -/* $OpenBSD: blowfish.c,v 1.8 1998/03/04 00:34:17 deraadt Exp $ */ +/* $OpenBSD: blowfish.c,v 1.9 1998/08/10 18:40:59 provos Exp $ */ /* * Blowfish block cipher for OpenBSD * Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de> @@ -584,6 +584,144 @@ blf_dec(c, data, blocks) d += 2; } } + +/* Repeating operations for little endian machines */ + +#define BLF_BLK_ENC l = ntohl (*(u_int32_t *)data); \ + r = ntohl (*(u_int32_t *)(data+4)); \ + Blowfish_encipher(c, &l, &r); \ + *(u_int32_t *)data = htonl (l); \ + *(u_int32_t *)(data + 4) = htonl (r); + +#define BLF_BLK_DEC l = ntohl (*(u_int32_t *)data); \ + r = ntohl (*(u_int32_t *)(data+4)); \ + Blowfish_decipher(c, &l, &r); \ + *(u_int32_t *)data = htonl (l); \ + *(u_int32_t *)(data + 4) = htonl (r); + + +#if __STDC__ +void +blf_ecb_encrypt(blf_ctx *c, u_int8_t *data, u_int32_t len) +#else +void +blf_ecb_encrypt(c, data, len) + blf_ctx *c; + u_int8_t *data; + u_int32_t len; +#endif +{ +#if BYTE_ORDER == LITTLE_ENDIAN + u_int32_t l, r; +#endif + u_int32_t i; + + for (i = 0; i < len; i += 8) { +#if BYTE_ORDER == LITTLE_ENDIAN + BLF_BLK_ENC; +#else + Blowfish_encipher(c, data, data + 4); +#endif + data += 8; + } +} + +#if __STDC__ +void +blf_ecb_decrypt(blf_ctx *c, u_int8_t *data, u_int32_t len) +#else +void +blf_ecb_decrypt(c, data, len) + blf_ctx *c; + u_int8_t *data; + u_int32_t len; +#endif +{ +#if BYTE_ORDER == LITTLE_ENDIAN + u_int32_t l, r; +#endif + u_int32_t i; + + for (i = 0; i < len; i += 8) { +#if BYTE_ORDER == LITTLE_ENDIAN + BLF_BLK_DEC; +#else + Blowfish_decipher(c, data, data + 4); +#endif + data += 8; + } +} + +#if __STDC__ +void +blf_cbc_encrypt(blf_ctx *c, u_int8_t *iv, u_int8_t *data, u_int32_t len) +#else +void +blf_cbc_encrypt(c, iv, data, len) + blf_ctx *c; + u_int8_t *iv; + u_int8_t *data; + u_int32_t len; +#endif +{ +#if BYTE_ORDER == LITTLE_ENDIAN + u_int32_t l, r; +#endif + u_int32_t i; + + for (i = 0; i < len; i += 8) { + *(u_int32_t *)data ^= *(u_int32_t *)iv; + *(u_int32_t *)(data + 4) ^= *(u_int32_t *)(iv + 4); +#if BYTE_ORDER == LITTLE_ENDIAN + BLF_BLK_ENC; +#else + Blowfish_encipher(c, data, data + 4); +#endif + iv = data; + data += 8; + } +} + +#if __STDC__ +void +blf_cbc_decrypt(blf_ctx *c, u_int8_t *iva, u_int8_t *data, u_int32_t len) +#else +void +blf_cbc_decrypt(c, iva, data, len) + blf_ctx *c; + u_int8_t *iva; + u_int8_t *data; + u_int32_t len; +#endif +{ +#if BYTE_ORDER == LITTLE_ENDIAN + u_int32_t l, r; +#endif + u_int8_t *iv; + u_int32_t i; + + iv = data + len - 16; + data = data + len - 8; + for (i = len - 8; i >= 8; i -= 8) { +#if BYTE_ORDER == LITTLE_ENDIAN + BLF_BLK_DEC; +#else + Blowfish_decipher(c, data, data + 4); +#endif + *(u_int32_t *)data ^= *(u_int32_t *)iv; + *(u_int32_t *)(data + 4) ^= *(u_int32_t *)(iv + 4); + iv = data; + data -= 8; + } +#if BYTE_ORDER == LITTLE_ENDIAN + BLF_BLK_DEC; +#else + Blowfish_decipher(c, data, data + 4); +#endif + *(u_int32_t *)data ^= *(u_int32_t *)iva; + *(u_int32_t *)(data + 4) ^= *(u_int32_t *)(iva + 4); +} + #if 0 void report(u_int32_t data[], u_int16_t len) |