Add 40-bit RC2 support.
As useless as it might seem, the certificates in PKCS#12 files appear to
always be encrypted with 40-bit RC2. OpenSSL, NSS and Windows are all
the same on this point. Thus, in order to be able to import PKCS#12
files we need RC2 support.
RC2 has deliberately not been added to EVP_get_cipherbynid so that the
linker can drop the RC2 code unless the PKCS#12 functions are actually
called.
Change-Id: I5b2062fdf78cb622a8038c326da01aac8fb58962
Reviewed-on: https://boringssl-review.googlesource.com/1590
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/include/openssl/cipher.h b/include/openssl/cipher.h
index 92cec76..3a3a856 100644
--- a/include/openssl/cipher.h
+++ b/include/openssl/cipher.h
@@ -91,6 +91,12 @@
* ciphertext. */
OPENSSL_EXPORT const EVP_CIPHER *EVP_enc_null(void);
+/* EVP_rc2_40_cbc returns a cipher that implements 40-bit RC2 in CBC mode. This
+ * is obviously very, very weak and is included only in order to read PKCS#12
+ * files, which often encrypt the certificate chain using this cipher. It is
+ * deliberately not exported. */
+const EVP_CIPHER *EVP_rc2_40_cbc(void);
+
/* EVP_get_cipherbynid returns the cipher corresponding to the given NID, or
* NULL if no such cipher is known. */
OPENSSL_EXPORT const EVP_CIPHER *EVP_get_cipherbynid(int nid);
