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import libc::{c_char, c_uchar, c_int};
#[link_name = "crypto"]
#[abi = "cdecl"]
extern mod libcrypto {
fn PKCS5_PBKDF2_HMAC_SHA1(pass: *c_char, passlen: c_int,
salt: *c_uchar, saltlen: c_int,
iter: c_int, keylen: c_int,
out: *c_uchar) -> c_int;
}
#[doc = "
Derives a key from a password and salt using the PBKDF2-HMAC-SHA1 algorithm.
"]
fn pbkdf2_hmac_sha1(pass: str, salt: ~[u8], iter: uint, keylen: uint) -> ~[u8] {
assert iter >= 1u;
assert keylen >= 1u;
do str::as_c_str(pass) |pass_buf| {
do vec::as_buf(salt) |salt_buf| {
let mut out = ~[];
vec::reserve(out, keylen);
do vec::as_buf(out) |out_buf| {
let r = libcrypto::PKCS5_PBKDF2_HMAC_SHA1(
pass_buf, str::len(pass) as c_int,
salt_buf, vec::len(salt) as c_int,
iter as c_int, keylen as c_int,
out_buf);
if r != 1 as c_int { fail; }
unsafe { vec::unsafe::set_len(out, keylen); }
}
out
}
}
}
#[cfg(test)]
mod tests {
// Test vectors from
// http://tools.ietf.org/html/draft-josefsson-pbkdf2-test-vectors-06
#[test]
fn test_pbkdf2_hmac_sha1() {
assert pbkdf2_hmac_sha1("password", str::bytes("salt"), 1u, 20u) == ~[
0x0c_u8, 0x60_u8, 0xc8_u8, 0x0f_u8, 0x96_u8, 0x1f_u8, 0x0e_u8,
0x71_u8, 0xf3_u8, 0xa9_u8, 0xb5_u8, 0x24_u8, 0xaf_u8, 0x60_u8,
0x12_u8, 0x06_u8, 0x2f_u8, 0xe0_u8, 0x37_u8, 0xa6_u8
];
assert pbkdf2_hmac_sha1("password", str::bytes("salt"), 2u, 20u) == ~[
0xea_u8, 0x6c_u8, 0x01_u8, 0x4d_u8, 0xc7_u8, 0x2d_u8, 0x6f_u8,
0x8c_u8, 0xcd_u8, 0x1e_u8, 0xd9_u8, 0x2a_u8, 0xce_u8, 0x1d_u8,
0x41_u8, 0xf0_u8, 0xd8_u8, 0xde_u8, 0x89_u8, 0x57_u8
];
assert pbkdf2_hmac_sha1("password", str::bytes("salt"), 4096u,
20u) == ~[
0x4b_u8, 0x00_u8, 0x79_u8, 0x01_u8, 0xb7_u8, 0x65_u8, 0x48_u8,
0x9a_u8, 0xbe_u8, 0xad_u8, 0x49_u8, 0xd9_u8, 0x26_u8, 0xf7_u8,
0x21_u8, 0xd0_u8, 0x65_u8, 0xa4_u8, 0x29_u8, 0xc1_u8
];
assert pbkdf2_hmac_sha1("password", str::bytes("salt"), 16777216u,
20u) == ~[
0xee_u8, 0xfe_u8, 0x3d_u8, 0x61_u8, 0xcd_u8, 0x4d_u8, 0xa4_u8,
0xe4_u8, 0xe9_u8, 0x94_u8, 0x5b_u8, 0x3d_u8, 0x6b_u8, 0xa2_u8,
0x15_u8, 0x8c_u8, 0x26_u8, 0x34_u8, 0xe9_u8, 0x84_u8
];
assert pbkdf2_hmac_sha1(
"passwordPASSWORDpassword",
str::bytes("saltSALTsaltSALTsaltSALTsaltSALTsalt"),
4096u, 25u) == ~[
0x3d_u8, 0x2e_u8, 0xec_u8, 0x4f_u8, 0xe4_u8, 0x1c_u8, 0x84_u8,
0x9b_u8, 0x80_u8, 0xc8_u8, 0xd8_u8, 0x36_u8, 0x62_u8, 0xc0_u8,
0xe4_u8, 0x4a_u8, 0x8b_u8, 0x29_u8, 0x1a_u8, 0x96_u8, 0x4c_u8,
0xf2_u8, 0xf0_u8, 0x70_u8, 0x38_u8
];
assert pbkdf2_hmac_sha1("pass\x00word", str::bytes("sa\x00lt"), 4096u,
16u) == ~[
0x56_u8, 0xfa_u8, 0x6a_u8, 0xa7_u8, 0x55_u8, 0x48_u8, 0x09_u8,
0x9d_u8, 0xcc_u8, 0x37_u8, 0xd7_u8, 0xf0_u8, 0x34_u8, 0x25_u8,
0xe0_u8, 0xc3_u8
];
}
}
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