diff --git a/apps/ocsp.c b/apps/ocsp.c
index ccf2f0f949..05db842cd9 100644
--- a/apps/ocsp.c
+++ b/apps/ocsp.c
@@ -174,6 +174,7 @@ int MAIN(int argc, char **argv)
 		goto end;
 	SSL_load_error_strings();
 	OpenSSL_add_ssl_algorithms();
+	X509V3_EXT_add_rfc6962();
 	args = argv + 1;
 	reqnames = sk_OPENSSL_STRING_new_null();
 	ids = sk_OCSP_CERTID_new_null();
@@ -970,6 +971,7 @@ end:
 		OPENSSL_free(path);
 		}
 
+	X509V3_EXT_cleanup();
 	OPENSSL_EXIT(ret);
 }
 
diff --git a/apps/s_client.c b/apps/s_client.c
index af88ffdaad..f85309f900 100644
--- a/apps/s_client.c
+++ b/apps/s_client.c
@@ -713,6 +713,8 @@ static char *jpake_secret = NULL;
 	c_msg=0;
 	c_showcerts=0;
 
+	X509V3_EXT_add_rfc6962();
+
 	if (bio_err == NULL)
 		bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 
@@ -2193,6 +2195,7 @@ end:
 		BIO_free(bio_c_msg);
 		bio_c_msg=NULL;
 		}
+	X509V3_EXT_cleanup();
 	apps_shutdown();
 	OPENSSL_EXIT(ret);
 	}
diff --git a/apps/x509.c b/apps/x509.c
index 1b612d17d4..db0ab1a6e9 100644
--- a/apps/x509.c
+++ b/apps/x509.c
@@ -73,6 +73,7 @@
 #include <openssl/x509v3.h>
 #include <openssl/objects.h>
 #include <openssl/pem.h>
+#include <openssl/ssl.h>
 #ifndef OPENSSL_NO_RSA
 #include <openssl/rsa.h>
 #endif
@@ -224,6 +225,8 @@ int MAIN(int argc, char **argv)
 
 	apps_startup();
 
+	X509V3_EXT_add_rfc6962();
+
 	if (bio_err == NULL)
 		bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 
@@ -1155,6 +1158,7 @@ end:
 	sk_ASN1_OBJECT_pop_free(trust, ASN1_OBJECT_free);
 	sk_ASN1_OBJECT_pop_free(reject, ASN1_OBJECT_free);
 	if (passin) OPENSSL_free(passin);
+	X509V3_EXT_cleanup();
 	apps_shutdown();
 	OPENSSL_EXIT(ret);
 	}
diff --git a/crypto/Makefile b/crypto/Makefile
index b253f504a6..146b414113 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -44,8 +44,8 @@ LIBOBJ= cryptlib.o mem.o mem_dbg.o cversion.o ex_data.o cpt_err.o \
 SRC= $(LIBSRC)
 
 EXHEADER= crypto.h opensslv.h opensslconf.h ebcdic.h symhacks.h \
-	ossl_typ.h
-HEADER=	cryptlib.h buildinf.h md32_common.h o_time.h o_str.h o_dir.h $(EXHEADER)
+	ossl_typ.h o_time.h
+HEADER=	cryptlib.h buildinf.h md32_common.h o_str.h o_dir.h $(EXHEADER)
 
 ALL=    $(GENERAL) $(SRC) $(HEADER)
 
diff --git a/crypto/bio/b_dump.c b/crypto/bio/b_dump.c
index c80ecc4295..b3a5f7d031 100644
--- a/crypto/bio/b_dump.c
+++ b/crypto/bio/b_dump.c
@@ -185,3 +185,25 @@ int BIO_dump_indent(BIO *bp, const char *s, int len, int indent)
 	return BIO_dump_indent_cb(write_bio, bp, s, len, indent);
 	}
 
+int BIO_hex_string(BIO *out, int indent, int width, unsigned char *data,
+		   int datalen)
+	{
+	int i, j = 0;
+
+	if (datalen < 1)
+		return 1;
+
+	for (i = 0; i < datalen - 1; i++)
+		{
+		if (i && !j) BIO_printf(out, "%*s", indent, "");
+
+		BIO_printf(out, "%02X:", data[i]);
+
+		j = (j + 1) % width;
+		if (!j) BIO_printf(out, "\n");
+		}
+
+	if (i && !j) BIO_printf(out, "%*s", indent, "");
+	BIO_printf(out, "%02X", data[datalen - 1]);
+	return 1;
+	}
diff --git a/crypto/bio/bio.h b/crypto/bio/bio.h
index c14009ad0d..8489ff80bb 100644
--- a/crypto/bio/bio.h
+++ b/crypto/bio/bio.h
@@ -707,6 +707,9 @@ int BIO_dump_indent(BIO *b,const char *bytes,int len,int indent);
 int BIO_dump_fp(FILE *fp, const char *s, int len);
 int BIO_dump_indent_fp(FILE *fp, const char *s, int len, int indent);
 #endif
+int BIO_hex_string(BIO *out, int indent, int width, unsigned char *data,
+		   int datalen);
+
 struct hostent *BIO_gethostbyname(const char *name);
 /* We might want a thread-safe interface too:
  * struct hostent *BIO_gethostbyname_r(const char *name,
diff --git a/crypto/objects/obj_dat.h b/crypto/objects/obj_dat.h
index b08ed9f49b..aee9cbbf3b 100644
--- a/crypto/objects/obj_dat.h
+++ b/crypto/objects/obj_dat.h
@@ -62,12 +62,12 @@
  * [including the GNU Public Licence.]
  */
 
-#define NUM_NID 951
-#define NUM_SN 944
-#define NUM_LN 944
-#define NUM_OBJ 883
+#define NUM_NID 955
+#define NUM_SN 948
+#define NUM_LN 948
+#define NUM_OBJ 887
 
-static const unsigned char lvalues[6188]={
+static const unsigned char lvalues[6228]={
 0x00,                                        /* [  0] OBJ_undef */
 0x2A,0x86,0x48,0x86,0xF7,0x0D,               /* [  1] OBJ_rsadsi */
 0x2A,0x86,0x48,0x86,0xF7,0x0D,0x01,          /* [  7] OBJ_pkcs */
@@ -951,6 +951,10 @@ static const unsigned char lvalues[6188]={
 0x2B,0x81,0x04,0x01,0x0E,0x01,               /* [6169] OBJ_dhSinglePass_cofactorDH_sha256kdf_scheme */
 0x2B,0x81,0x04,0x01,0x0E,0x02,               /* [6175] OBJ_dhSinglePass_cofactorDH_sha384kdf_scheme */
 0x2B,0x81,0x04,0x01,0x0E,0x03,               /* [6181] OBJ_dhSinglePass_cofactorDH_sha512kdf_scheme */
+0x2B,0x06,0x01,0x04,0x01,0xD6,0x79,0x02,0x04,0x02,/* [6187] OBJ_ct_precert_scts */
+0x2B,0x06,0x01,0x04,0x01,0xD6,0x79,0x02,0x04,0x03,/* [6197] OBJ_ct_precert_poison */
+0x2B,0x06,0x01,0x04,0x01,0xD6,0x79,0x02,0x04,0x04,/* [6207] OBJ_ct_precert_signer */
+0x2B,0x06,0x01,0x04,0x01,0xD6,0x79,0x02,0x04,0x05,/* [6217] OBJ_ct_cert_scts */
 };
 
 static const ASN1_OBJECT nid_objs[NUM_NID]={
@@ -2500,6 +2504,14 @@ static const ASN1_OBJECT nid_objs[NUM_NID]={
 	NID_aes_192_cbc_hmac_sha256,0,NULL,0},
 {"AES-256-CBC-HMAC-SHA256","aes-256-cbc-hmac-sha256",
 	NID_aes_256_cbc_hmac_sha256,0,NULL,0},
+{"ct_precert_scts","CT Precertificate SCTs",NID_ct_precert_scts,10,
+	&(lvalues[6187]),0},
+{"ct_precert_poison","CT Precertificate Poison",NID_ct_precert_poison,
+	10,&(lvalues[6197]),0},
+{"ct_precert_signer","CT Precertificate Signer",NID_ct_precert_signer,
+	10,&(lvalues[6207]),0},
+{"ct_cert_scts","CT Certificate SCTs",NID_ct_cert_scts,10,
+	&(lvalues[6217]),0},
 };
 
 static const unsigned int sn_objs[NUM_SN]={
@@ -2777,6 +2789,10 @@ static const unsigned int sn_objs[NUM_SN]={
 884,	/* "crossCertificatePair" */
 806,	/* "cryptocom" */
 805,	/* "cryptopro" */
+954,	/* "ct_cert_scts" */
+952,	/* "ct_precert_poison" */
+951,	/* "ct_precert_scts" */
+953,	/* "ct_precert_signer" */
 500,	/* "dITRedirect" */
 451,	/* "dNSDomain" */
 495,	/* "dSAQuality" */
@@ -3460,6 +3476,10 @@ static const unsigned int ln_objs[NUM_LN]={
 285,	/* "Biometric Info" */
 179,	/* "CA Issuers" */
 785,	/* "CA Repository" */
+954,	/* "CT Certificate SCTs" */
+952,	/* "CT Precertificate Poison" */
+951,	/* "CT Precertificate SCTs" */
+953,	/* "CT Precertificate Signer" */
 131,	/* "Code Signing" */
 783,	/* "Diffie-Hellman based MAC" */
 382,	/* "Directory" */
@@ -5202,6 +5222,10 @@ static const unsigned int obj_objs[NUM_OBJ]={
 138,	/* OBJ_ms_efs                       1 3 6 1 4 1 311 10 3 4 */
 648,	/* OBJ_ms_smartcard_login           1 3 6 1 4 1 311 20 2 2 */
 649,	/* OBJ_ms_upn                       1 3 6 1 4 1 311 20 2 3 */
+951,	/* OBJ_ct_precert_scts              1 3 6 1 4 1 11129 2 4 2 */
+952,	/* OBJ_ct_precert_poison            1 3 6 1 4 1 11129 2 4 3 */
+953,	/* OBJ_ct_precert_signer            1 3 6 1 4 1 11129 2 4 4 */
+954,	/* OBJ_ct_cert_scts                 1 3 6 1 4 1 11129 2 4 5 */
 751,	/* OBJ_camellia_128_cbc             1 2 392 200011 61 1 1 1 2 */
 752,	/* OBJ_camellia_192_cbc             1 2 392 200011 61 1 1 1 3 */
 753,	/* OBJ_camellia_256_cbc             1 2 392 200011 61 1 1 1 4 */
diff --git a/crypto/objects/obj_mac.h b/crypto/objects/obj_mac.h
index 841b02a546..71590387ed 100644
--- a/crypto/objects/obj_mac.h
+++ b/crypto/objects/obj_mac.h
@@ -4158,3 +4158,23 @@
 #define SN_dh_cofactor_kdf		"dh-cofactor-kdf"
 #define NID_dh_cofactor_kdf		947
 
+#define SN_ct_precert_scts		"ct_precert_scts"
+#define LN_ct_precert_scts		"CT Precertificate SCTs"
+#define NID_ct_precert_scts		951
+#define OBJ_ct_precert_scts		1L,3L,6L,1L,4L,1L,11129L,2L,4L,2L
+
+#define SN_ct_precert_poison		"ct_precert_poison"
+#define LN_ct_precert_poison		"CT Precertificate Poison"
+#define NID_ct_precert_poison		952
+#define OBJ_ct_precert_poison		1L,3L,6L,1L,4L,1L,11129L,2L,4L,3L
+
+#define SN_ct_precert_signer		"ct_precert_signer"
+#define LN_ct_precert_signer		"CT Precertificate Signer"
+#define NID_ct_precert_signer		953
+#define OBJ_ct_precert_signer		1L,3L,6L,1L,4L,1L,11129L,2L,4L,4L
+
+#define SN_ct_cert_scts		"ct_cert_scts"
+#define LN_ct_cert_scts		"CT Certificate SCTs"
+#define NID_ct_cert_scts		954
+#define OBJ_ct_cert_scts		1L,3L,6L,1L,4L,1L,11129L,2L,4L,5L
+
diff --git a/crypto/objects/obj_mac.num b/crypto/objects/obj_mac.num
index 4093f514c2..0b04b9d083 100644
--- a/crypto/objects/obj_mac.num
+++ b/crypto/objects/obj_mac.num
@@ -948,3 +948,7 @@ dh_cofactor_kdf		947
 aes_128_cbc_hmac_sha256		948
 aes_192_cbc_hmac_sha256		949
 aes_256_cbc_hmac_sha256		950
+ct_precert_scts		951
+ct_precert_poison		952
+ct_precert_signer		953
+ct_cert_scts		954
diff --git a/crypto/objects/objects.txt b/crypto/objects/objects.txt
index 58dc4b715b..77e9536831 100644
--- a/crypto/objects/objects.txt
+++ b/crypto/objects/objects.txt
@@ -1335,3 +1335,9 @@ secg-scheme 14 3 : dhSinglePass-cofactorDH-sha512kdf-scheme
 # NIDs for use with lookup tables.
                  : dh-std-kdf
                  : dh-cofactor-kdf
+
+# RFC 6962 Extension OIDs (see http://www.ietf.org/rfc/rfc6962.txt)
+1 3 6 1 4 1 11129 2 4 2	: ct_precert_scts		: CT Precertificate SCTs
+1 3 6 1 4 1 11129 2 4 3	: ct_precert_poison		: CT Precertificate Poison
+1 3 6 1 4 1 11129 2 4 4	: ct_precert_signer		: CT Precertificate Signer
+1 3 6 1 4 1 11129 2 4 5	: ct_cert_scts			: CT Certificate SCTs
diff --git a/ssl/ssl.h b/ssl/ssl.h
index 2c3a9a34b7..3f65e87c6d 100644
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -2557,6 +2557,9 @@ void SSL_trace(int write_p, int version, int content_type,
 const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c);
 #endif
 
+/* RFC6962 Signed Certificate Timestamp List X.509 extension parser */
+int X509V3_EXT_add_rfc6962(void);
+
 /* BEGIN ERROR CODES */
 /* The following lines are auto generated by the script mkerr.pl. Any changes
  * made after this point may be overwritten when the script is next run.
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index 1a2aef70e4..8f47795d86 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -231,6 +231,15 @@
 			 l|=((BN_ULLONG)(*((c)++)))<< 8, \
 			 l|=((BN_ULLONG)(*((c)++))))
 
+#define n2l8(c,l)	(l =((BN_ULLONG)(*((c)++)))<<56, \
+			 l|=((BN_ULLONG)(*((c)++)))<<48, \
+			 l|=((BN_ULLONG)(*((c)++)))<<40, \
+			 l|=((BN_ULLONG)(*((c)++)))<<32, \
+			 l|=((BN_ULLONG)(*((c)++)))<<24, \
+			 l|=((BN_ULLONG)(*((c)++)))<<16, \
+			 l|=((BN_ULLONG)(*((c)++)))<< 8, \
+			 l|=((BN_ULLONG)(*((c)++))))
+
 /* NOTE - c is not incremented as per l2c */
 #define l2cn(l1,l2,c,n)	{ \
 			c+=n; \
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index 6c988d1829..ebb6a94f0c 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -110,10 +110,13 @@
  */
 
 #include <stdio.h>
+#include <time.h>
+#include <openssl/bio.h>
 #include <openssl/objects.h>
 #include <openssl/evp.h>
 #include <openssl/hmac.h>
 #include <openssl/ocsp.h>
+#include <openssl/o_time.h>
 #include <openssl/rand.h>
 #include "ssl_locl.h"
 
@@ -4432,3 +4435,126 @@ int SSL_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain)
 	}
 
 #endif
+
+/* RFC6962 Signed Certificate Timestamp List X.509 extension parser */
+int i2r_sctlist(X509V3_EXT_METHOD *method, ASN1_OCTET_STRING *oct,
+		BIO *out, int indent)
+	{
+	BN_ULLONG timestamp;
+	struct tm tm1;
+	time_t unix_epoch = 0;
+	unsigned char* data = oct->data;
+	char month[4];
+	unsigned short listlen, sctlen = 0, fieldlen;
+	int signhash_nid;
+
+	if (oct->length < 2)
+		return 0;
+	n2s(data, listlen);
+	if (listlen != oct->length - 2)
+		return 0;
+
+	while (listlen > 0)
+		{
+		if (listlen < 2)
+			return 0;
+		n2s(data, sctlen);
+		listlen -= 2;
+
+		if ((sctlen < 1) || (sctlen > listlen))
+			return 0;
+		listlen -= sctlen;
+
+		BIO_printf(out, "%*sSigned Certificate Timestamp:", indent,
+			   "");
+
+		if (*data == 0)		/* SCT v1 */
+			{
+			/* Fixed-length header:
+			 *		struct {
+			 * (1 byte)	  Version sct_version;
+			 * (32 bytes)	  LogID id;
+			 * (8 bytes)	  uint64 timestamp;
+			 * (2 bytes + ?)  CtExtensions extensions;
+			 */
+			if (sctlen < 43)
+				return 0;
+			sctlen -= 43;
+
+			BIO_printf(out, "\n%*sVersion   : v1(0)", indent + 4,
+				   "");
+
+			BIO_printf(out, "\n%*sLog ID    : ", indent + 4, "");
+			BIO_hex_string(out, indent + 16, 16, data + 1, 32);
+
+			data += 33;
+			n2l8(data, timestamp);
+			OPENSSL_gmtime(&unix_epoch, &tm1);
+			OPENSSL_gmtime_adj(&tm1, timestamp / 86400000,
+					   (timestamp % 86400000) / 1000);
+			strftime(month, 4, "%b", &tm1);
+			BIO_printf(out, "\n%*sTimestamp : ", indent + 4, "");
+			BIO_printf(out, "%s %2d %02d:%02d:%02d.%03u %d UTC",
+				   month, tm1.tm_mday, tm1.tm_hour,
+				   tm1.tm_min, tm1.tm_sec,
+				   (unsigned int)(timestamp % 1000),
+				   tm1.tm_year + 1900);
+
+			n2s(data, fieldlen);
+			if (sctlen < fieldlen)
+				return 0;
+			sctlen -= fieldlen;
+			BIO_printf(out, "\n%*sExtensions: ", indent + 4, "");
+			if (fieldlen == 0)
+				BIO_printf(out, "none");
+			else
+				BIO_hex_string(out, indent + 16, 16, data,
+					       fieldlen);
+			data += fieldlen;
+
+			/* digitally-signed struct header:
+			 * (1 byte) Hash algorithm
+			 * (1 byte) Signature algorithm
+			 * (2 bytes + ?) Signature
+			 */
+			if (sctlen < 4)
+				return 0;
+			sctlen -= 4;
+
+			tls1_lookup_sigalg(NULL, NULL, &signhash_nid, data);
+			data += 2;
+			n2s(data, fieldlen);
+			if (sctlen != fieldlen)
+				return 0;
+			BIO_printf(out, "\n%*sSignature : ", indent + 4, "");
+			BIO_printf(out, "%s", OBJ_nid2ln(signhash_nid));
+			BIO_printf(out, "\n%*s            ", indent + 4, "");
+			BIO_hex_string(out, indent + 16, 16, data, fieldlen);
+			if (listlen > 0) BIO_printf(out, "\n");
+			data += fieldlen;
+			}
+		}
+
+	return 1;
+	}
+
+static X509V3_EXT_METHOD ext_method_ct_precert_scts =
+	{
+	NID_ct_precert_scts, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
+	0, 0, 0, 0, 0, 0, 0, 0, (X509V3_EXT_I2R)i2r_sctlist, NULL, NULL
+	};
+
+static X509V3_EXT_METHOD ext_method_ct_cert_scts =
+	{
+	NID_ct_cert_scts, 0, ASN1_ITEM_ref(ASN1_OCTET_STRING),
+	0, 0, 0, 0, 0, 0, 0, 0, (X509V3_EXT_I2R)i2r_sctlist, NULL, NULL
+	};
+
+int X509V3_EXT_add_rfc6962(void)
+	{
+	if (!X509V3_EXT_add(&ext_method_ct_precert_scts))
+		return 0;
+	if (!X509V3_EXT_add(&ext_method_ct_cert_scts))
+		return 0;
+	return 1;
+	}