diff --git a/src/crypto.c b/src/crypto.c
index 57b640c4..778e668d 100644
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -33,6 +33,30 @@
 
 #include "crypto.h"
 
+/* RFC 3526, Section 2 */
+const unsigned char crypto_dh5_prime[] = {
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f, 0xda, 0xa2,
+	0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b, 0x80, 0xdc, 0x1c, 0xd1,
+	0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67, 0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6,
+	0x3b, 0x13, 0x9b, 0x22, 0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd,
+	0xef, 0x95, 0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
+	0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51, 0xc2, 0x45,
+	0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6, 0xf4, 0x4c, 0x42, 0xe9,
+	0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff, 0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed,
+	0xee, 0x38, 0x6b, 0xfb, 0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11,
+	0x7c, 0x4b, 0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe4, 0x5b, 0x3d,
+	0xc2, 0x00, 0x7c, 0xb8, 0xa1, 0x63, 0xbf, 0x05, 0x98, 0xda, 0x48, 0x36,
+	0x1c, 0x55, 0xd3, 0x9a, 0x69, 0x16, 0x3f, 0xa8, 0xfd, 0x24, 0xcf, 0x5f,
+	0x83, 0x65, 0x5d, 0x23, 0xdc, 0xa3, 0xad, 0x96, 0x1c, 0x62, 0xf3, 0x56,
+	0x20, 0x85, 0x52, 0xbb, 0x9e, 0xd5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6d,
+	0x67, 0x0c, 0x35, 0x4e, 0x4a, 0xbc, 0x98, 0x04, 0xf1, 0x74, 0x6c, 0x08,
+	0xca, 0x23, 0x73, 0x27, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+};
+size_t crypto_dh5_prime_size = sizeof(crypto_dh5_prime);
+
+const unsigned char crypto_dh5_generator[] = { 0x2 };
+size_t crypto_dh5_generator_size = sizeof(crypto_dh5_generator);
+
 static bool hmac_common(enum l_checksum_type type,
 		const void *key, size_t key_len,
                 const void *data, size_t data_len, void *output, size_t size)
diff --git a/src/crypto.h b/src/crypto.h
index 9b663383..63949d4c 100644
--- a/src/crypto.h
+++ b/src/crypto.h
@@ -37,6 +37,11 @@ struct crypto_ptk {
 	uint8_t tk[0];
 } __attribute__ ((packed));
 
+extern const unsigned char crypto_dh5_prime[];
+extern size_t crypto_dh5_prime_size;
+extern const unsigned char crypto_dh5_generator[];
+extern size_t crypto_dh5_generator_size;
+
 bool hmac_md5(const void *key, size_t key_len,
 		const void *data, size_t data_len, void *output, size_t size);
 bool hmac_sha1(const void *key, size_t key_len,