X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fevp%2Fe_aes.c;h=361abf2fd2d9940111b6f8d3ed68caf8fc1cfa7f;hp=d6ba037dcf50f83e07ddff209b4a479e03b97f9d;hb=c2fd5989945501b81b7d698c71eb34d767ac55bd;hpb=069d4cfea58379336028d34d32793de6365f75fc

diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c
index d6ba037dcf..361abf2fd2 100644
--- a/crypto/evp/e_aes.c
+++ b/crypto/evp/e_aes.c
@@ -48,6 +48,8 @@
  *
  */
 
+#define OPENSSL_FIPSAPI
+
 #include <openssl/opensslconf.h>
 #ifndef OPENSSL_NO_AES
 #include <openssl/evp.h>
@@ -56,6 +58,8 @@
 #include <assert.h>
 #include <openssl/aes.h>
 #include "evp_locl.h"
+#include "modes_lcl.h"
+#include <openssl/rand.h>
 
 static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 					const unsigned char *iv, int enc);
@@ -69,24 +73,18 @@ typedef struct
 
 IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
 		       NID_aes_128, 16, 16, 16, 128,
-		       0, aes_init_key, NULL, 
-		       EVP_CIPHER_set_asn1_iv,
-		       EVP_CIPHER_get_asn1_iv,
-		       NULL)
+		       EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
+		       aes_init_key, NULL, NULL, NULL, NULL)
 IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
 		       NID_aes_192, 16, 24, 16, 128,
-		       0, aes_init_key, NULL, 
-		       EVP_CIPHER_set_asn1_iv,
-		       EVP_CIPHER_get_asn1_iv,
-		       NULL)
+		       EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
+		       aes_init_key, NULL, NULL, NULL, NULL)
 IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
 		       NID_aes_256, 16, 32, 16, 128,
-		       0, aes_init_key, NULL, 
-		       EVP_CIPHER_set_asn1_iv,
-		       EVP_CIPHER_get_asn1_iv,
-		       NULL)
+		       EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
+		       aes_init_key, NULL, NULL, NULL, NULL)
 
-#define IMPLEMENT_AES_CFBR(ksize,cbits)	IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16)
+#define IMPLEMENT_AES_CFBR(ksize,cbits)	IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16,EVP_CIPH_FLAG_FIPS)
 
 IMPLEMENT_AES_CFBR(128,1)
 IMPLEMENT_AES_CFBR(192,1)
@@ -101,9 +99,19 @@ static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
 {
 	unsigned int num;
 	num = ctx->num;
-	AES_ctr128_encrypt (in,out,len,
+#ifdef AES_CTR_ASM
+	void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
+			size_t blocks, const AES_KEY *key,
+			const unsigned char ivec[AES_BLOCK_SIZE]);
+
+	CRYPTO_ctr128_encrypt_ctr32(in,out,len,
+		&((EVP_AES_KEY *)ctx->cipher_data)->ks,
+		ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
+#else
+	CRYPTO_ctr128_encrypt(in,out,len,
 		&((EVP_AES_KEY *)ctx->cipher_data)->ks,
-		ctx->iv,ctx->buf,&num);
+		ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
+#endif
 	ctx->num = (size_t)num;
 	return 1;
 }
@@ -111,7 +119,7 @@ static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
 static const EVP_CIPHER aes_128_ctr_cipher=
 	{
 	NID_aes_128_ctr,1,16,16,
-	EVP_CIPH_CUSTOM_IV,
+	EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 	aes_init_key,
 	aes_counter,
 	NULL,
@@ -128,7 +136,7 @@ const EVP_CIPHER *EVP_aes_128_ctr (void)
 static const EVP_CIPHER aes_192_ctr_cipher=
 	{
 	NID_aes_192_ctr,1,24,16,
-	EVP_CIPH_CUSTOM_IV,
+	EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 	aes_init_key,
 	aes_counter,
 	NULL,
@@ -145,7 +153,7 @@ const EVP_CIPHER *EVP_aes_192_ctr (void)
 static const EVP_CIPHER aes_256_ctr_cipher=
 	{
 	NID_aes_256_ctr,1,32,16,
-	EVP_CIPH_CUSTOM_IV,
+	EVP_CIPH_CTR_MODE|EVP_CIPH_FLAG_FIPS,
 	aes_init_key,
 	aes_counter,
 	NULL,
@@ -177,17 +185,599 @@ static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
 		return 0;
 		}
 
-	if (ctx->cipher->flags&EVP_CIPH_CUSTOM_IV)
+	return 1;
+	}
+
+typedef struct
+	{
+	/* AES key schedule to use */
+	AES_KEY ks;
+	/* Set if key initialised */
+	int key_set;
+	/* Set if an iv is set */
+	int iv_set;
+	GCM128_CONTEXT gcm;
+	/* Temporary IV store */
+	unsigned char *iv;
+	/* IV length */
+	int ivlen;
+	int taglen;
+	/* It is OK to generate IVs */
+	int iv_gen;
+	} EVP_AES_GCM_CTX;
+
+static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
+	{
+	EVP_AES_GCM_CTX *gctx = c->cipher_data;
+	OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
+	if (gctx->iv != c->iv)
+		OPENSSL_free(gctx->iv);
+	return 1;
+	}
+
+/* increment counter (64-bit int) by 1 */
+static void ctr64_inc(unsigned char *counter) {
+	int n=8;
+	unsigned char  c;
+
+	do {
+		--n;
+		c = counter[n];
+		++c;
+		counter[n] = c;
+		if (c) return;
+	} while (n);
+}
+
+static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+	{
+	EVP_AES_GCM_CTX *gctx = c->cipher_data;
+	switch (type)
+		{
+	case EVP_CTRL_INIT:
+		gctx->key_set = 0;
+		gctx->iv_set = 0;
+		gctx->ivlen = c->cipher->iv_len;
+		gctx->iv = c->iv;
+		gctx->taglen = -1;
+		gctx->iv_gen = 0;
+		return 1;
+
+	case EVP_CTRL_GCM_SET_IVLEN:
+		if (arg <= 0)
+			return 0;
+#ifdef OPENSSL_FIPS
+		if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
+						 && arg < 12)
+			return 0;
+#endif
+		/* Allocate memory for IV if needed */
+		if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
+			{
+			if (gctx->iv != c->iv)
+				OPENSSL_free(gctx->iv);
+			gctx->iv = OPENSSL_malloc(arg);
+			if (!gctx->iv)
+				return 0;
+			}
+		gctx->ivlen = arg;
+		return 1;
+
+	case EVP_CTRL_GCM_SET_TAG:
+		if (arg <= 0 || arg > 16 || c->encrypt)
+			return 0;
+		memcpy(c->buf, ptr, arg);
+		gctx->taglen = arg;
+		return 1;
+
+	case EVP_CTRL_GCM_GET_TAG:
+		if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
+			return 0;
+		memcpy(ptr, c->buf, arg);
+		return 1;
+
+	case EVP_CTRL_GCM_SET_IV_FIXED:
+		/* Special case: -1 length restores whole IV */
+		if (arg == -1)
+			{
+			memcpy(gctx->iv, ptr, gctx->ivlen);
+			gctx->iv_gen = 1;
+			return 1;
+			}
+		/* Fixed field must be at least 4 bytes and invocation field
+		 * at least 8.
+		 */
+		if ((arg < 4) || (gctx->ivlen - arg) < 8)
+			return 0;
+		if (arg)
+			memcpy(gctx->iv, ptr, arg);
+		if (RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
+			return 0;
+		gctx->iv_gen = 1;
+		return 1;
+
+	case EVP_CTRL_GCM_IV_GEN:
+		if (gctx->iv_gen == 0 || gctx->key_set == 0)
+			return 0;
+		CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
+		memcpy(ptr, gctx->iv, gctx->ivlen);
+		/* Invocation field will be at least 8 bytes in size and
+		 * so no need to check wrap around or increment more than
+		 * last 8 bytes.
+		 */
+		ctr64_inc(gctx->iv + gctx->ivlen - 8);
+		gctx->iv_set = 1;
+		return 1;
+
+	default:
+		return -1;
+
+		}
+	}
+
+static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc)
+	{
+	EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
+	if (!iv && !key)
+		return 1;
+	if (key)
+		{
+		AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
+		CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
+		/* If we have an iv can set it directly, otherwise use
+		 * saved IV.
+		 */
+		if (iv == NULL && gctx->iv_set)
+			iv = gctx->iv;
+		if (iv)
+			{
+			CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
+			gctx->iv_set = 1;
+			}
+		gctx->key_set = 1;
+		}
+	else
+		{
+		/* If key set use IV, otherwise copy */
+		if (gctx->key_set)
+			CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
+		else
+			memcpy(gctx->iv, iv, gctx->ivlen);
+		gctx->iv_set = 1;
+		gctx->iv_gen = 0;
+		}
+	return 1;
+	}
+
+static int aes_gcm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+		const unsigned char *in, size_t len)
+	{
+	EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
+	/* If not set up, return error */
+	if (!gctx->iv_set && !gctx->key_set)
+		return -1;
+	if (!ctx->encrypt && gctx->taglen < 0)
+		return -1;
+	if (in)
+		{
+		if (out == NULL)
+			{
+			if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
+				return -1;
+			}
+		else if (ctx->encrypt)
+			{
+			if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
+				return -1;
+			}
+		else
+			{
+			if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
+				return -1;
+			}
+		return len;
+		}
+	else
 		{
-		if (iv!=NULL)
-			memcpy (ctx->iv,iv,ctx->cipher->iv_len);
-		else	{
-			EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_IV_SETUP_FAILED);
+		if (!ctx->encrypt)
+			{
+			if (CRYPTO_gcm128_finish(&gctx->gcm,
+					ctx->buf, gctx->taglen) != 0)
+				return -1;
+			gctx->iv_set = 0;
 			return 0;
 			}
+		CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
+		gctx->taglen = 16;
+		/* Don't reuse the IV */
+		gctx->iv_set = 0;
+		return 0;
 		}
 
+	}
+
+static const EVP_CIPHER aes_128_gcm_cipher=
+	{
+	NID_aes_128_gcm,1,16,12,
+	EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_gcm_init_key,
+	aes_gcm,
+	aes_gcm_cleanup,
+	sizeof(EVP_AES_GCM_CTX),
+	NULL,
+	NULL,
+	aes_gcm_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_128_gcm (void)
+{	return &aes_128_gcm_cipher;	}
+
+static const EVP_CIPHER aes_192_gcm_cipher=
+	{
+	NID_aes_192_gcm,1,24,12,
+	EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_gcm_init_key,
+	aes_gcm,
+	aes_gcm_cleanup,
+	sizeof(EVP_AES_GCM_CTX),
+	NULL,
+	NULL,
+	aes_gcm_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_192_gcm (void)
+{	return &aes_192_gcm_cipher;	}
+
+static const EVP_CIPHER aes_256_gcm_cipher=
+	{
+	NID_aes_256_gcm,1,32,12,
+	EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_gcm_init_key,
+	aes_gcm,
+	aes_gcm_cleanup,
+	sizeof(EVP_AES_GCM_CTX),
+	NULL,
+	NULL,
+	aes_gcm_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_256_gcm (void)
+{	return &aes_256_gcm_cipher;	}
+
+typedef struct
+	{
+	/* AES key schedules to use */
+	AES_KEY ks1, ks2;
+	XTS128_CONTEXT xts;
+	} EVP_AES_XTS_CTX;
+
+static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+	{
+	EVP_AES_XTS_CTX *xctx = c->cipher_data;
+	if (type != EVP_CTRL_INIT)
+		return -1;
+	/* key1 and key2 are used as an indicator both key and IV are set */
+	xctx->xts.key1 = NULL;
+	xctx->xts.key2 = NULL;
 	return 1;
 	}
 
+static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc)
+	{
+	EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
+	if (!iv && !key)
+		return 1;
+
+	if (key)
+		{
+		/* key_len is two AES keys */
+		if (ctx->encrypt)
+			{
+			AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1);
+			xctx->xts.block1 = (block128_f)AES_encrypt;
+			}
+		else
+			{
+			AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1);
+			xctx->xts.block1 = (block128_f)AES_decrypt;
+			}
+
+		AES_set_encrypt_key(key + ctx->key_len/2,
+						ctx->key_len * 4, &xctx->ks2);
+		xctx->xts.block2 = (block128_f)AES_encrypt;
+
+		xctx->xts.key1 = &xctx->ks1;
+		}
+
+	if (iv)
+		{
+		xctx->xts.key2 = &xctx->ks2;
+		memcpy(ctx->iv, iv, 16);
+		}
+
+	return 1;
+	}
+
+static int aes_xts(EVP_CIPHER_CTX *ctx, unsigned char *out,
+		const unsigned char *in, size_t len)
+	{
+	EVP_AES_XTS_CTX *xctx = ctx->cipher_data;
+	if (!xctx->xts.key1 || !xctx->xts.key2)
+		return -1;
+	if (!out || !in)
+		return -1;
+#ifdef OPENSSL_FIPS
+	/* Requirement of SP800-38E */
+	if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) &&
+			(len > (1L<<20)*16))
+		{
+		EVPerr(EVP_F_AES_XTS, EVP_R_TOO_LARGE);
+		return -1;
+		}
+#endif
+	if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len,
+								ctx->encrypt))
+		return -1;
+	return len;
+	}
+
+static const EVP_CIPHER aes_128_xts_cipher=
+	{
+	NID_aes_128_xts,16,32,16,
+	EVP_CIPH_XTS_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_xts_init_key,
+	aes_xts,
+	0,
+	sizeof(EVP_AES_XTS_CTX),
+	NULL,
+	NULL,
+	aes_xts_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_128_xts (void)
+{	return &aes_128_xts_cipher;	}
+	
+static const EVP_CIPHER aes_256_xts_cipher=
+	{
+	NID_aes_256_xts,16,64,16,
+	EVP_CIPH_XTS_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_xts_init_key,
+	aes_xts,
+	0,
+	sizeof(EVP_AES_XTS_CTX),
+	NULL,
+	NULL,
+	aes_xts_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_256_xts (void)
+{	return &aes_256_xts_cipher;	}
+
+typedef struct
+	{
+	/* AES key schedule to use */
+	AES_KEY ks;
+	/* Set if key initialised */
+	int key_set;
+	/* Set if an iv is set */
+	int iv_set;
+	/* Set if tag is valid */
+	int tag_set;
+	/* Set if message length set */
+	int len_set;
+	/* L and M parameters from RFC3610 */
+	int L, M;
+	CCM128_CONTEXT ccm;
+	} EVP_AES_CCM_CTX;
+
+static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+	{
+	EVP_AES_CCM_CTX *cctx = c->cipher_data;
+	switch (type)
+		{
+	case EVP_CTRL_INIT:
+		cctx->key_set = 0;
+		cctx->iv_set = 0;
+		cctx->L = 8;
+		cctx->M = 12;
+		cctx->tag_set = 0;
+		cctx->len_set = 0;
+		return 1;
+
+	case EVP_CTRL_CCM_SET_IVLEN:
+		arg = 15 - arg;
+	case EVP_CTRL_CCM_SET_L:
+		if (arg < 2 || arg > 8)
+			return 0;
+		cctx->L = arg;
+		return 1;
+
+	case EVP_CTRL_CCM_SET_TAG:
+		if ((arg & 1) || arg < 4 || arg > 16)
+			return 0;
+		if ((c->encrypt && ptr) || (!c->encrypt && !ptr))
+			return 0;
+		if (ptr)
+			{
+			cctx->tag_set = 1;
+			memcpy(c->buf, ptr, arg);
+			}
+		cctx->M = arg;
+		return 1;
+
+	case EVP_CTRL_CCM_GET_TAG:
+		if (!c->encrypt || !cctx->tag_set)
+			return 0;
+		if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
+			return 0;
+		cctx->tag_set = 0;
+		cctx->iv_set = 0;
+		cctx->len_set = 0;
+		return 1;
+
+	default:
+		return -1;
+
+		}
+	}
+
+static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+                        const unsigned char *iv, int enc)
+	{
+	EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
+	if (!iv && !key)
+		return 1;
+	if (key)
+		{
+		AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
+		CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
+					&cctx->ks, (block128_f)AES_encrypt);
+		cctx->key_set = 1;
+		}
+	if (iv)
+		{
+		memcpy(ctx->iv, iv, 15 - cctx->L);
+		cctx->iv_set = 1;
+		}
+	return 1;
+	}
+
+static int aes_ccm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+		const unsigned char *in, size_t len)
+	{
+	EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
+	CCM128_CONTEXT *ccm = &cctx->ccm;
+	/* If not set up, return error */
+	if (!cctx->iv_set && !cctx->key_set)
+		return -1;
+	if (!ctx->encrypt && !cctx->tag_set)
+		return -1;
+	if (!out)
+		{
+		if (!in)
+			{
+			if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
+				return -1;
+			cctx->len_set = 1;
+			return len;
+			}
+		/* If have AAD need message length */
+		if (!cctx->len_set && len)
+			return -1;
+		CRYPTO_ccm128_aad(ccm, in, len);
+		return len;
+		}
+	/* EVP_*Final() doesn't return any data */
+	if (!in)
+		return 0;
+	/* If not set length yet do it */
+	if (!cctx->len_set)
+		{
+		if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
+			return -1;
+		cctx->len_set = 1;
+		}
+	if (ctx->encrypt)
+		{
+		if (CRYPTO_ccm128_encrypt(ccm, in, out, len))
+			return -1;
+		cctx->tag_set = 1;
+		return len;
+		}
+	else
+		{
+		int rv = -1;
+		if (!CRYPTO_ccm128_decrypt(ccm, in, out, len))
+			{
+			unsigned char tag[16];
+			if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
+				{
+				if (!memcmp(tag, ctx->buf, cctx->M))
+					rv = len;
+				}
+			}
+		if (rv == -1)
+			OPENSSL_cleanse(out, len);
+		cctx->iv_set = 0;
+		cctx->tag_set = 0;
+		cctx->len_set = 0;
+		return rv;
+		}
+
+	}
+
+static const EVP_CIPHER aes_128_ccm_cipher=
+	{
+	NID_aes_128_ccm,1,16,12,
+	EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_ccm_init_key,
+	aes_ccm,
+	0,
+	sizeof(EVP_AES_CCM_CTX),
+	NULL,
+	NULL,
+	aes_ccm_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_128_ccm (void)
+{	return &aes_128_ccm_cipher;	}
+
+static const EVP_CIPHER aes_192_ccm_cipher=
+	{
+	NID_aes_192_ccm,1,24,12,
+	EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_ccm_init_key,
+	aes_ccm,
+	0,
+	sizeof(EVP_AES_CCM_CTX),
+	NULL,
+	NULL,
+	aes_ccm_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_192_ccm (void)
+{	return &aes_192_ccm_cipher;	}
+
+static const EVP_CIPHER aes_256_ccm_cipher=
+	{
+	NID_aes_256_ccm,1,32,12,
+	EVP_CIPH_CCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+		| EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+		| EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+	aes_ccm_init_key,
+	aes_ccm,
+	0,
+	sizeof(EVP_AES_CCM_CTX),
+	NULL,
+	NULL,
+	aes_ccm_ctrl,
+	NULL
+	};
+
+const EVP_CIPHER *EVP_aes_256_ccm (void)
+{	return &aes_256_ccm_cipher;	}
+
 #endif