diff --git a/drivers/auth/cryptocell/cryptocell_crypto.c b/drivers/auth/cryptocell/cryptocell_crypto.c
new file mode 100644
index 0000000..bf7dff4
--- /dev/null
+++ b/drivers/auth/cryptocell/cryptocell_crypto.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <crypto_mod.h>
+#include <crypto_driver.h>
+#include <debug.h>
+#include <mbedtls_common.h>
+#include <platform_def.h>
+#include <rsa.h>
+#include <sbrom_bsv_api.h>
+#include <secureboot_base_func.h>
+#include <secureboot_gen_defs.h>
+#include <stddef.h>
+#include <string.h>
+#include <utils.h>
+#include <util.h>
+
+#include <mbedtls/oid.h>
+
+#define LIB_NAME		"CryptoCell SBROM"
+#define RSA_SALT_LEN		32
+#define RSA_EXPONENT		65537
+
+/*
+ * AlgorithmIdentifier  ::=  SEQUENCE  {
+ *     algorithm            OBJECT IDENTIFIER,
+ *     parameters           ANY DEFINED BY algorithm OPTIONAL
+ * }
+ *
+ * SubjectPublicKeyInfo  ::=  SEQUENCE  {
+ *     algorithm            AlgorithmIdentifier,
+ *     subjectPublicKey     BIT STRING
+ * }
+ *
+ * DigestInfo ::= SEQUENCE {
+ *     digestAlgorithm      AlgorithmIdentifier,
+ *     digest               OCTET STRING
+ * }
+ *
+ *  RSASSA-PSS-params ::= SEQUENCE {
+ *     hashAlgorithm        [0] HashAlgorithm,
+ *     maskGenAlgorithm     [1] MaskGenAlgorithm,
+ *     saltLength           [2] INTEGER,
+ *     trailerField         [3] TrailerField    DEFAULT trailerFieldBC
+ * }
+ */
+
+/*
+ * Initialize the library and export the descriptor
+ */
+static void init(void)
+{
+	CCError_t ret;
+
+	/* Initialize CC SBROM */
+	ret = CC_BsvSbromInit((uintptr_t)PLAT_CRYPTOCELL_BASE);
+	if (ret != CC_OK) {
+		ERROR("CryptoCell CC_BsvSbromInit() error %x\n", ret);
+		panic();
+	}
+}
+
+/*
+ * Verify a signature.
+ *
+ * Parameters are passed using the DER encoding format following the ASN.1
+ * structures detailed above.
+ */
+static int verify_signature(void *data_ptr, unsigned int data_len,
+			    void *sig_ptr, unsigned int sig_len,
+			    void *sig_alg, unsigned int sig_alg_len,
+			    void *pk_ptr, unsigned int pk_len)
+{
+	CCError_t error;
+	CCSbNParams_t pk;
+	CCSbSignature_t signature;
+	int rc, exp;
+	mbedtls_asn1_buf sig_oid, alg_oid, params;
+	mbedtls_md_type_t md_alg;
+	mbedtls_pk_type_t pk_alg;
+	mbedtls_pk_rsassa_pss_options pss_opts;
+	size_t len;
+	uint8_t *p, *end;
+	/* Temp buf to store the public key modulo (N) in LE format */
+	uint32_t RevN[SB_RSA_MOD_SIZE_IN_WORDS];
+
+	/* Verify the signature algorithm */
+	/* Get pointers to signature OID and parameters */
+	p = sig_alg;
+	end = p + sig_alg_len;
+	rc = mbedtls_asn1_get_alg(&p, end, &sig_oid, &params);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/* Get the actual signature algorithm (MD + PK) */
+	rc = mbedtls_oid_get_sig_alg(&sig_oid, &md_alg, &pk_alg);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/* The CryptoCell only supports RSASSA-PSS signature */
+	if (pk_alg != MBEDTLS_PK_RSASSA_PSS || md_alg != MBEDTLS_MD_NONE)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/* Verify the RSASSA-PSS params */
+	/* The trailer field is verified to be 0xBC internally by this API */
+	rc = mbedtls_x509_get_rsassa_pss_params(&params, &md_alg,
+			&pss_opts.mgf1_hash_id,
+			&pss_opts.expected_salt_len);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/* The CryptoCell only supports SHA256 as hash algorithm */
+	if (md_alg != MBEDTLS_MD_SHA256 || pss_opts.mgf1_hash_id != MBEDTLS_MD_SHA256)
+		return CRYPTO_ERR_SIGNATURE;
+
+	if (pss_opts.expected_salt_len != RSA_SALT_LEN)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/* Parse the public key */
+	p = pk_ptr;
+	end = p + pk_len;
+	rc = mbedtls_asn1_get_tag(&p, end, &len,
+			MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	end = p + len;
+	rc = mbedtls_asn1_get_alg_null(&p, end, &alg_oid);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	if (mbedtls_oid_get_pk_alg(&alg_oid, &pk_alg) != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	if (pk_alg != MBEDTLS_PK_RSA)
+		return CRYPTO_ERR_SIGNATURE;
+
+	rc = mbedtls_asn1_get_bitstring_null(&p, end, &len);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	rc = mbedtls_asn1_get_tag(&p, end, &len,
+				MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	rc = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_INTEGER);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	if (*p == 0) {
+		p++; len--;
+	}
+	if (len != RSA_MOD_SIZE_IN_BYTES || ((p + len) > end))
+		return CRYPTO_ERR_SIGNATURE;
+
+	/*
+	 * The CCSbVerifySignature() API expects N and Np in BE format and
+	 * the signature in LE format. Copy N from certificate.
+	 */
+	memcpy(pk.N, p, RSA_MOD_SIZE_IN_BYTES);
+
+	/* Verify the RSA exponent */
+	p += len;
+	rc = mbedtls_asn1_get_int(&p, end, &exp);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	if (exp != RSA_EXPONENT)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/*
+	 * Calculate the Np (Barrett n' value). The RSA_CalcNp() API expects
+	 * N in LE format. Hence reverse N into a temporary buffer `RevN`.
+	 */
+	UTIL_ReverseMemCopy((uint8_t *)RevN, (uint8_t *)pk.N, sizeof(RevN));
+
+	RSA_CalcNp((uintptr_t)PLAT_CRYPTOCELL_BASE, RevN, pk.Np);
+
+	/* Np is in LE format. Reverse it to BE */
+	UTIL_ReverseBuff((uint8_t *)pk.Np, sizeof(pk.Np));
+
+	/* Get the signature (bitstring) */
+	p = sig_ptr;
+	end = p + sig_len;
+	rc = mbedtls_asn1_get_bitstring_null(&p, end, &len);
+	if (rc != 0)
+		return CRYPTO_ERR_SIGNATURE;
+
+	if (len != RSA_MOD_SIZE_IN_BYTES || ((p + len) > end))
+		return CRYPTO_ERR_SIGNATURE;
+
+	/*
+	 *  The signature is BE format. Convert it to LE before calling
+	 *  CCSbVerifySignature().
+	 */
+	UTIL_ReverseMemCopy((uint8_t *)signature.sig, p, RSA_MOD_SIZE_IN_BYTES);
+
+	/*
+	 * CryptoCell utilises DMA internally to transfer data. Flush the data
+	 * from caches.
+	 */
+	flush_dcache_range((uintptr_t)data_ptr, data_len);
+
+	/* Verify the signature */
+	error = CCSbVerifySignature((uintptr_t)PLAT_CRYPTOCELL_BASE,
+			(uint32_t *)data_ptr, &pk, &signature,
+			data_len, RSA_PSS_2048);
+	if (error != CC_OK)
+		return CRYPTO_ERR_SIGNATURE;
+
+	/* Signature verification success */
+	return CRYPTO_SUCCESS;
+}
+
+/*
+ * Match a hash
+ *
+ * Digest info is passed in DER format following the ASN.1 structure detailed
+ * above.
+ */
+static int verify_hash(void *data_ptr, unsigned int data_len,
+		       void *digest_info_ptr, unsigned int digest_info_len)
+{
+	mbedtls_asn1_buf hash_oid, params;
+	mbedtls_md_type_t md_alg;
+	uint8_t *p, *end, *hash;
+	CCHashResult_t pubKeyHash;
+	size_t len;
+	int rc;
+	CCError_t error;
+
+	/* Digest info should be an MBEDTLS_ASN1_SEQUENCE */
+	p = digest_info_ptr;
+	end = p + digest_info_len;
+	rc = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_CONSTRUCTED |
+				  MBEDTLS_ASN1_SEQUENCE);
+	if (rc != 0)
+		return CRYPTO_ERR_HASH;
+
+	/* Get the hash algorithm */
+	rc = mbedtls_asn1_get_alg(&p, end, &hash_oid, &params);
+	if (rc != 0)
+		return CRYPTO_ERR_HASH;
+
+	rc = mbedtls_oid_get_md_alg(&hash_oid, &md_alg);
+	if (rc != 0)
+		return CRYPTO_ERR_HASH;
+	/* Verify that hash algorithm is SHA256 */
+	if (md_alg != MBEDTLS_MD_SHA256)
+		return CRYPTO_ERR_HASH;
+
+	/* Hash should be octet string type */
+	rc = mbedtls_asn1_get_tag(&p, end, &len, MBEDTLS_ASN1_OCTET_STRING);
+	if (rc != 0)
+		return CRYPTO_ERR_HASH;
+
+	/* Length of hash must match the algorithm's size */
+	if (len != HASH_RESULT_SIZE_IN_BYTES)
+		return CRYPTO_ERR_HASH;
+
+	/*
+	 * CryptoCell utilises DMA internally to transfer data. Flush the data
+	 * from caches.
+	 */
+	flush_dcache_range((uintptr_t)data_ptr, data_len);
+
+	hash = p;
+	error = SBROM_CryptoHash((uintptr_t)PLAT_CRYPTOCELL_BASE,
+			(uintptr_t)data_ptr, data_len, pubKeyHash);
+	if (error != CC_OK)
+		return CRYPTO_ERR_HASH;
+
+	rc = memcmp(pubKeyHash, hash, HASH_RESULT_SIZE_IN_BYTES);
+	if (rc != 0)
+		return CRYPTO_ERR_HASH;
+
+	return CRYPTO_SUCCESS;
+}
+
+/*
+ * Register crypto library descriptor
+ */
+REGISTER_CRYPTO_LIB(LIB_NAME, init, verify_signature, verify_hash);
+
+