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GH355: Implement HKDF

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This patch implements the HMAC-based Extract-and-Expand Key Derivation
Function (HKDF) as defined in RFC 5869.

It is required to implement the QUIC and TLS 1.3 protocols (among others).

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
This commit is contained in:
Alessandro Ghedini
2016-03-02 23:58:27 +00:00
committed by Rich Salz
parent b894054e3f
commit aacfb134be
13 changed files with 552 additions and 7 deletions
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crypto/include/internal/evp_int.h
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@@ -131,6 +131,7 @@ extern const EVP_PKEY_METHOD ec_pkey_meth;
extern const EVP_PKEY_METHOD hmac_pkey_meth;
extern const EVP_PKEY_METHOD rsa_pkey_meth;
extern const EVP_PKEY_METHOD tls1_prf_pkey_meth;
extern const EVP_PKEY_METHOD hkdf_pkey_meth;
struct evp_md_st {
int type;