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1 files changed, 138 insertions, 0 deletions

diff --git a/src/crypto/pkcs5.rs b/src/crypto/pkcs5.rs
new file mode 100644
index 00000000..9dfc026c
--- /dev/null
+++ b/src/crypto/pkcs5.rs
@@ -0,0 +1,138 @@
+use std::libc::c_int;
+use std::vec;
+
+mod libcrypto {
+    use std::libc::c_int;
+
+    #[link(name = "crypto")]
+    extern {
+        pub fn PKCS5_PBKDF2_HMAC_SHA1(pass: *u8, passlen: c_int,
+                                      salt: *u8, saltlen: c_int,
+                                      iter: c_int, keylen: c_int,
+                                      out: *mut u8) -> c_int;
+    }
+}
+
+/// Derives a key from a password and salt using the PBKDF2-HMAC-SHA1 algorithm.
+pub fn pbkdf2_hmac_sha1(pass: &str, salt: &[u8], iter: uint,
+                        keylen: uint) -> ~[u8] {
+    assert!(iter >= 1u);
+    assert!(keylen >= 1u);
+
+    pass.as_imm_buf(|pass_buf, pass_len| {
+        salt.as_imm_buf(|salt_buf, salt_len| {
+            let mut out = vec::with_capacity(keylen);
+
+            out.as_mut_buf(|out_buf, _out_len| {
+                let r = unsafe {
+                    libcrypto::PKCS5_PBKDF2_HMAC_SHA1(
+                        pass_buf, pass_len as c_int,
+                        salt_buf, salt_len as c_int,
+                        iter as c_int, keylen as c_int,
+                        out_buf)
+                };
+
+                if r != 1 as c_int { fail!(); }
+            });
+
+            unsafe { out.set_len(keylen); }
+
+            out
+        })
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // Test vectors from
+    // http://tools.ietf.org/html/draft-josefsson-pbkdf2-test-vectors-06
+    #[test]
+    fn test_pbkdf2_hmac_sha1() {
+        assert_eq!(
+            pbkdf2_hmac_sha1(
+                "password",
+                "salt".as_bytes(),
+                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_eq!(
+            pbkdf2_hmac_sha1(
+                "password",
+                "salt".as_bytes(),
+                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_eq!(
+            pbkdf2_hmac_sha1(
+                "password",
+                "salt".as_bytes(),
+                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_eq!(
+            pbkdf2_hmac_sha1(
+                "password",
+                "salt".as_bytes(),
+                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_eq!(
+            pbkdf2_hmac_sha1(
+                "passwordPASSWORDpassword",
+                "saltSALTsaltSALTsaltSALTsaltSALTsalt".as_bytes(),
+                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_eq!(
+            pbkdf2_hmac_sha1(
+                "pass\x00word",
+                "sa\x00lt".as_bytes(),
+                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
+            ]
+        );
+    }
+}