diff options
Diffstat (limited to 'src/libstrongswan/credentials/keys')
| -rw-r--r-- | src/libstrongswan/credentials/keys/private_key.h | 6 | ||||
| -rw-r--r-- | src/libstrongswan/credentials/keys/public_key.c | 57 | ||||
| -rw-r--r-- | src/libstrongswan/credentials/keys/public_key.h | 16 | ||||
| -rw-r--r-- | src/libstrongswan/credentials/keys/signature_params.c | 366 | ||||
| -rw-r--r-- | src/libstrongswan/credentials/keys/signature_params.h | 129 |
5 files changed, 548 insertions, 26 deletions
diff --git a/src/libstrongswan/credentials/keys/private_key.h b/src/libstrongswan/credentials/keys/private_key.h index b9f7dad55..d7cfdd74d 100644 --- a/src/libstrongswan/credentials/keys/private_key.h +++ b/src/libstrongswan/credentials/keys/private_key.h @@ -1,6 +1,7 @@ /* + * Copyright (C) 2017 Tobias Brunner * Copyright (C) 2007 Martin Willi - * Hochschule fuer Technik Rapperswil + * HSR Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -42,11 +43,12 @@ struct private_key_t { * Create a signature over a chunk of data. * * @param scheme signature scheme to use + * @param params optional parameters required by the specified scheme * @param data chunk of data to sign * @param signature where to allocate created signature * @return TRUE if signature created */ - bool (*sign)(private_key_t *this, signature_scheme_t scheme, + bool (*sign)(private_key_t *this, signature_scheme_t scheme, void *params, chunk_t data, chunk_t *signature); /** * Decrypt a chunk of data. diff --git a/src/libstrongswan/credentials/keys/public_key.c b/src/libstrongswan/credentials/keys/public_key.c index 87f7e6664..89fa9b348 100644 --- a/src/libstrongswan/credentials/keys/public_key.c +++ b/src/libstrongswan/credentials/keys/public_key.c @@ -1,7 +1,7 @@ /* - * Copyright (C) 2015 Tobias Brunner - * Copyright (C) 2007 Martin Willi + * Copyright (C) 2015-2017 Tobias Brunner * Copyright (C) 2014-2016 Andreas Steffen + * Copyright (C) 2007 Martin Willi * HSR Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it @@ -18,6 +18,7 @@ #include <asn1/oid.h> #include "public_key.h" +#include "signature_params.h" ENUM(key_type_names, KEY_ANY, KEY_BLISS, "ANY", @@ -42,6 +43,7 @@ ENUM(signature_scheme_names, SIGN_UNKNOWN, SIGN_BLISS_WITH_SHA3_512, "RSA_EMSA_PKCS1_SHA3_256", "RSA_EMSA_PKCS1_SHA3_384", "RSA_EMSA_PKCS1_SHA3_512", + "RSA_EMSA_PSS", "ECDSA_WITH_SHA1_DER", "ECDSA_WITH_SHA256_DER", "ECDSA_WITH_SHA384_DER", @@ -146,6 +148,8 @@ signature_scheme_t signature_scheme_from_oid(int oid) return SIGN_RSA_EMSA_PKCS1_SHA3_384; case OID_RSASSA_PKCS1V15_WITH_SHA3_512: return SIGN_RSA_EMSA_PKCS1_SHA3_512; + case OID_RSASSA_PSS: + return SIGN_RSA_EMSA_PSS; case OID_ECDSA_WITH_SHA1: case OID_EC_PUBLICKEY: return SIGN_ECDSA_WITH_SHA1_DER; @@ -210,6 +214,8 @@ int signature_scheme_to_oid(signature_scheme_t scheme) return OID_RSASSA_PKCS1V15_WITH_SHA3_384; case SIGN_RSA_EMSA_PKCS1_SHA3_512: return OID_RSASSA_PKCS1V15_WITH_SHA3_384; + case SIGN_RSA_EMSA_PSS: + return OID_RSASSA_PSS; case SIGN_ECDSA_WITH_SHA1_DER: return OID_ECDSA_WITH_SHA1; case SIGN_ECDSA_WITH_SHA256_DER: @@ -239,26 +245,42 @@ int signature_scheme_to_oid(signature_scheme_t scheme) } /** + * Parameters for RSA/PSS signature schemes + */ +#define PSS_PARAMS(bits) static rsa_pss_params_t pss_params_sha##bits = { \ + .hash = HASH_SHA##bits, \ + .mgf1_hash = HASH_SHA##bits, \ + .salt_len = RSA_PSS_SALT_LEN_DEFAULT, \ +} + +PSS_PARAMS(256); +PSS_PARAMS(384); +PSS_PARAMS(512); + +/** * Map for signature schemes to the key type and maximum key size allowed. * We only cover schemes with hash algorithms supported by IKEv2 signature * authentication. */ static struct { - signature_scheme_t scheme; key_type_t type; int max_keysize; + signature_params_t params; } scheme_map[] = { - { SIGN_RSA_EMSA_PKCS1_SHA2_256, KEY_RSA, 3072 }, - { SIGN_RSA_EMSA_PKCS1_SHA2_384, KEY_RSA, 7680 }, - { SIGN_RSA_EMSA_PKCS1_SHA2_512, KEY_RSA, 0 }, - { SIGN_ECDSA_WITH_SHA256_DER, KEY_ECDSA, 256 }, - { SIGN_ECDSA_WITH_SHA384_DER, KEY_ECDSA, 384 }, - { SIGN_ECDSA_WITH_SHA512_DER, KEY_ECDSA, 0 }, - { SIGN_ED25519, KEY_ED25519, 0 }, - { SIGN_ED448, KEY_ED448, 0 }, - { SIGN_BLISS_WITH_SHA2_256, KEY_BLISS, 128 }, - { SIGN_BLISS_WITH_SHA2_384, KEY_BLISS, 192 }, - { SIGN_BLISS_WITH_SHA2_512, KEY_BLISS, 0 } + { KEY_RSA, 3072, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha256, }}, + { KEY_RSA, 7680, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha384, }}, + { KEY_RSA, 0, { .scheme = SIGN_RSA_EMSA_PSS, .params = &pss_params_sha512, }}, + { KEY_RSA, 3072, { .scheme = SIGN_RSA_EMSA_PKCS1_SHA2_256 }}, + { KEY_RSA, 7680, { .scheme = SIGN_RSA_EMSA_PKCS1_SHA2_384 }}, + { KEY_RSA, 0, { .scheme = SIGN_RSA_EMSA_PKCS1_SHA2_512 }}, + { KEY_ECDSA, 256, { .scheme = SIGN_ECDSA_WITH_SHA256_DER }}, + { KEY_ECDSA, 384, { .scheme = SIGN_ECDSA_WITH_SHA384_DER }}, + { KEY_ECDSA, 0, { .scheme = SIGN_ECDSA_WITH_SHA512_DER }}, + { KEY_ED25519, 0, { .scheme = SIGN_ED25519 }}, + { KEY_ED448, 0, { .scheme = SIGN_ED448 }}, + { KEY_BLISS, 128, { .scheme = SIGN_BLISS_WITH_SHA2_256 }}, + { KEY_BLISS, 192, { .scheme = SIGN_BLISS_WITH_SHA2_384 }}, + { KEY_BLISS, 0, { .scheme = SIGN_BLISS_WITH_SHA2_512 }}, }; /** @@ -274,9 +296,9 @@ typedef struct { METHOD(enumerator_t, signature_schemes_enumerate, bool, private_enumerator_t *this, va_list args) { - signature_scheme_t *scheme; + signature_params_t **params; - VA_ARGS_VGET(args, scheme); + VA_ARGS_VGET(args, params); while (++this->index < countof(scheme_map)) { @@ -284,7 +306,7 @@ METHOD(enumerator_t, signature_schemes_enumerate, bool, (this->size <= scheme_map[this->index].max_keysize || !scheme_map[this->index].max_keysize)) { - *scheme = scheme_map[this->index].scheme; + *params = &scheme_map[this->index].params; return TRUE; } } @@ -332,6 +354,7 @@ key_type_t key_type_from_signature_scheme(signature_scheme_t scheme) case SIGN_RSA_EMSA_PKCS1_SHA3_256: case SIGN_RSA_EMSA_PKCS1_SHA3_384: case SIGN_RSA_EMSA_PKCS1_SHA3_512: + case SIGN_RSA_EMSA_PSS: return KEY_RSA; case SIGN_ECDSA_WITH_SHA1_DER: case SIGN_ECDSA_WITH_SHA256_DER: diff --git a/src/libstrongswan/credentials/keys/public_key.h b/src/libstrongswan/credentials/keys/public_key.h index 06c1aa488..877ed20a2 100644 --- a/src/libstrongswan/credentials/keys/public_key.h +++ b/src/libstrongswan/credentials/keys/public_key.h @@ -1,7 +1,7 @@ /* - * Copyright (C) 2015 Tobias Brunner - * Copyright (C) 2007 Martin Willi + * Copyright (C) 2015-2017 Tobias Brunner * Copyright (C) 2014-2017 Andreas Steffen + * Copyright (C) 2007 Martin Willi * HSR Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it @@ -28,7 +28,6 @@ typedef enum key_type_t key_type_t; typedef enum signature_scheme_t signature_scheme_t; typedef enum encryption_scheme_t encryption_scheme_t; -#include <library.h> #include <utils/identification.h> #include <credentials/cred_encoding.h> @@ -89,6 +88,8 @@ enum signature_scheme_t { SIGN_RSA_EMSA_PKCS1_SHA3_384, /** EMSA-PKCS1_v1.5 signature as in PKCS#1 using RSA and SHA-3_512 */ SIGN_RSA_EMSA_PKCS1_SHA3_512, + /** EMSA-PSS signature as in PKCS#1 using RSA */ + SIGN_RSA_EMSA_PSS, /** ECDSA with SHA-1 using DER encoding as in RFC 3279 */ SIGN_ECDSA_WITH_SHA1_DER, /** ECDSA with SHA-256 using DER encoding as in RFC 3279 */ @@ -168,12 +169,13 @@ struct public_key_t { /** * Verifies a signature against a chunk of data. * - * @param scheme signature scheme to use for verification, may be default + * @param scheme signature scheme to use for verification + * @param params optional parameters required by the specified scheme * @param data data to check signature against * @param signature signature to check * @return TRUE if signature matches */ - bool (*verify)(public_key_t *this, signature_scheme_t scheme, + bool (*verify)(public_key_t *this, signature_scheme_t scheme, void *params, chunk_t data, chunk_t signature); /** @@ -279,11 +281,11 @@ int signature_scheme_to_oid(signature_scheme_t scheme); /** * Enumerate signature schemes that are appropriate for a key of the given type - * and size|strength. + * and size|strength ordered by increasing strength. * * @param type type of the key * @param size size or strength of the key - * @return enumerator over signature_scheme_t (increasing strength) + * @return enumerator over signature_params_t* (by strength) */ enumerator_t *signature_schemes_for_key(key_type_t type, int size); diff --git a/src/libstrongswan/credentials/keys/signature_params.c b/src/libstrongswan/credentials/keys/signature_params.c new file mode 100644 index 000000000..6b4d22e7b --- /dev/null +++ b/src/libstrongswan/credentials/keys/signature_params.c @@ -0,0 +1,366 @@ +/* + * Copyright (C) 2017 Tobias Brunner + * HSR Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include "signature_params.h" + +#include <asn1/oid.h> +#include <asn1/asn1_parser.h> + +/** + * Determine the salt length in case it is not configured + */ +static ssize_t rsa_pss_salt_length(rsa_pss_params_t *pss) +{ + ssize_t salt_len = pss->salt_len; + + if (salt_len <= RSA_PSS_SALT_LEN_DEFAULT) + { + salt_len = hasher_hash_size(pss->hash); + if (!salt_len) + { + return -1; + } + } + return salt_len; +} + +/** + * Compare two signature schemes and their parameters + */ +static bool compare_params(signature_params_t *a, signature_params_t *b, + bool strict) +{ + if (!a && !b) + { + return TRUE; + } + if (!a || !b) + { + return FALSE; + } + if (a->scheme != b->scheme) + { + return FALSE; + } + if (!a->params && !b->params) + { + return TRUE; + } + if (a->params && b->params) + { + switch (a->scheme) + { + case SIGN_RSA_EMSA_PSS: + { + rsa_pss_params_t *pss_a = a->params, *pss_b = b->params; + + return pss_a->hash == pss_b->hash && + pss_a->mgf1_hash == pss_b->mgf1_hash && + (!strict || + rsa_pss_salt_length(pss_a) == rsa_pss_salt_length(pss_b)); + } + default: + break; + } + } + return FALSE; +} + +/* + * Described in header + */ +bool signature_params_equal(signature_params_t *a, signature_params_t *b) +{ + return compare_params(a, b, TRUE); +} + +/* + * Described in header + */ +bool signature_params_comply(signature_params_t *c, signature_params_t *s) +{ /* the salt is variable, so it does not necessarily have to be the same */ + return compare_params(c, s, FALSE); +} + +/* + * Described in header + */ +signature_params_t *signature_params_clone(signature_params_t *this) +{ + signature_params_t *clone; + + if (!this) + { + return NULL; + } + + INIT(clone, + .scheme = this->scheme, + ); + if (this->params) + { + switch (this->scheme) + { + case SIGN_RSA_EMSA_PSS: + { + rsa_pss_params_t *pss, *pss_clone; + + pss = this->params; + INIT(pss_clone, + .hash = pss->hash, + .mgf1_hash = pss->mgf1_hash, + .salt_len = pss->salt_len, + /* ignore salt as only used for unit tests */ + ); + clone->params = pss_clone; + break; + } + default: + break; + } + } + return clone; +} + +/* + * Described in header + */ +void signature_params_destroy(signature_params_t *this) +{ + if (this) + { + free(this->params); + free(this); + } +} + +/* + * Described in header + */ +void signature_params_clear(signature_params_t *this) +{ + if (this) + { + free(this->params); + this->params = NULL; + this->scheme = SIGN_UNKNOWN; + } +} + +/* + * Described in header + */ +bool signature_params_parse(chunk_t asn1, int level0, + signature_params_t *params) +{ + chunk_t parameters = chunk_empty; + int oid; + + oid = asn1_parse_algorithmIdentifier(asn1, level0, ¶meters); + params->scheme = signature_scheme_from_oid(oid); + switch (params->scheme) + { + case SIGN_UNKNOWN: + return FALSE; + case SIGN_RSA_EMSA_PSS: + { + rsa_pss_params_t *pss = malloc_thing(rsa_pss_params_t); + + if (!rsa_pss_params_parse(parameters, level0+1, pss)) + { + DBG1(DBG_IKE, "failed parsing RSASSA-PSS parameters"); + free(pss); + return FALSE; + } + params->params = pss; + break; + } + default: + params->params = NULL; + break; + } + return TRUE; +} + +/* + * Described in header + */ +bool signature_params_build(signature_params_t *params, chunk_t *asn1) +{ + chunk_t parameters = chunk_empty; + int oid; + + oid = signature_scheme_to_oid(params->scheme); + if (oid == OID_UNKNOWN) + { + return FALSE; + } + if (params->scheme == SIGN_RSA_EMSA_PSS && + !rsa_pss_params_build(params->params, ¶meters)) + { + return FALSE; + } + if (parameters.len) + { + *asn1 = asn1_algorithmIdentifier_params(oid, parameters); + } + else + { + *asn1 = asn1_algorithmIdentifier(oid); + } + return TRUE; +} + +/** + * ASN.1 definition of RSASSA-PSS-params + */ +static const asn1Object_t RSASSAPSSParamsObjects[] = { + { 0, "RSASSA-PSS-params", ASN1_SEQUENCE, ASN1_NONE }, /* 0 */ + { 1, "DEFAULT SHA-1", ASN1_CONTEXT_C_0, ASN1_DEF }, /* 1 */ + { 2, "hashAlgorithm", ASN1_EOC, ASN1_RAW }, /* 2 */ + { 1, "DEFAULT MGF1SHA1", ASN1_CONTEXT_C_1, ASN1_DEF }, /* 3 */ + { 2, "maskGenAlgorithm",ASN1_EOC, ASN1_RAW }, /* 4 */ + { 1, "DEFAULT 20", ASN1_CONTEXT_C_2, ASN1_DEF }, /* 5 */ + { 2, "saltLength", ASN1_INTEGER, ASN1_BODY }, /* 6 */ + { 1, "DEFAULT 1", ASN1_CONTEXT_C_3, ASN1_DEF }, /* 7 */ + { 2, "trailerField", ASN1_INTEGER, ASN1_BODY }, /* 8 */ + { 0, "exit", ASN1_EOC, ASN1_EXIT } +}; +#define RSASSA_PSS_PARAMS_HASH_ALG 2 +#define RSASSA_PSS_PARAMS_MGF_ALG 4 +#define RSASSA_PSS_PARAMS_SALT_LEN 6 +#define RSASSA_PSS_PARAMS_TRAILER 8 + +/* + * Described in header + */ +bool rsa_pss_params_parse(chunk_t asn1, int level0, rsa_pss_params_t *params) +{ + asn1_parser_t *parser; + chunk_t object; + int objectID, alg; + bool success = FALSE; + + params->hash = HASH_SHA1; + params->mgf1_hash = HASH_SHA1; + params->salt_len = HASH_SIZE_SHA1; + + parser = asn1_parser_create(RSASSAPSSParamsObjects, asn1); + parser->set_top_level(parser, level0); + + while (parser->iterate(parser, &objectID, &object)) + { + u_int level = parser->get_level(parser)+1; + + switch (objectID) + { + case RSASSA_PSS_PARAMS_HASH_ALG: + if (object.len) + { + alg = asn1_parse_algorithmIdentifier(object, level, NULL); + params->hash = hasher_algorithm_from_oid(alg); + if (params->hash == HASH_UNKNOWN) + { + goto end; + } + } + break; + case RSASSA_PSS_PARAMS_MGF_ALG: + if (object.len) + { + chunk_t hash; + + alg = asn1_parse_algorithmIdentifier(object, level, &hash); + if (alg != OID_MGF1) + { + goto end; + } + alg = asn1_parse_algorithmIdentifier(hash, level+1, NULL); + params->mgf1_hash = hasher_algorithm_from_oid(alg); + if (params->mgf1_hash == HASH_UNKNOWN) + { + goto end; + } + } + break; + case RSASSA_PSS_PARAMS_SALT_LEN: + if (object.len) + { + params->salt_len = (size_t)asn1_parse_integer_uint64(object); + } + break; + case RSASSA_PSS_PARAMS_TRAILER: + if (object.len && (object.len != 1 || *object.ptr != 1)) + { + goto end; + } + break; + default: + break; + } + } + success = parser->success(parser); + +end: + parser->destroy(parser); + return success; +} + +/* + * Described in header + */ +bool rsa_pss_params_build(rsa_pss_params_t *params, chunk_t *asn1) +{ + chunk_t hash = chunk_empty, mgf = chunk_empty, slen = chunk_empty; + ssize_t salt_len; + int alg; + + if (params->hash != HASH_SHA1) + { /* with SHA-1 we MUST omit the field */ + alg = hasher_algorithm_to_oid(params->hash); + if (alg == OID_UNKNOWN) + { + return FALSE; + } + hash = asn1_algorithmIdentifier(alg); + } + if (params->mgf1_hash != HASH_SHA1) + { /* with MGF1-SHA1 we MUST omit the field */ + alg = hasher_algorithm_to_oid(params->mgf1_hash); + if (alg == OID_UNKNOWN) + { + chunk_free(&hash); + return FALSE; + } + mgf = asn1_algorithmIdentifier_params(OID_MGF1, + asn1_algorithmIdentifier(alg)); + } + salt_len = rsa_pss_salt_length(params); + if (salt_len < 0) + { + chunk_free(&hash); + chunk_free(&mgf); + return FALSE; + } + else if (salt_len != HASH_SIZE_SHA1) + { + slen = asn1_integer("m", asn1_integer_from_uint64(salt_len)); + } + *asn1 = asn1_wrap(ASN1_SEQUENCE, "mmm", + hash.len ? asn1_wrap(ASN1_CONTEXT_C_0, "m", hash) : chunk_empty, + mgf.len ? asn1_wrap(ASN1_CONTEXT_C_1, "m", mgf) : chunk_empty, + slen.len ? asn1_wrap(ASN1_CONTEXT_C_2, "m", slen) : chunk_empty); + return TRUE; +} diff --git a/src/libstrongswan/credentials/keys/signature_params.h b/src/libstrongswan/credentials/keys/signature_params.h new file mode 100644 index 000000000..6934c5e88 --- /dev/null +++ b/src/libstrongswan/credentials/keys/signature_params.h @@ -0,0 +1,129 @@ +/* + * Copyright (C) 2017 Tobias Brunner + * HSR Hochschule fuer Technik Rapperswil + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +/** + * @defgroup signature_params signature_params + * @{ @ingroup keys + */ + +#ifndef SIGNATURE_PARAMS_H_ +#define SIGNATURE_PARAMS_H_ + +typedef struct signature_params_t signature_params_t; +typedef struct rsa_pss_params_t rsa_pss_params_t; + +#include <crypto/hashers/hasher.h> + +/** + * Signature scheme with parameters + */ +struct signature_params_t { + /** Signature scheme */ + signature_scheme_t scheme; + /** Parameters, depending on scheme */ + void *params; +}; + +/** + * Compare two signature schemes and their parameters + * + * @param a first scheme + * @param b second scheme + * @return TRUE if schemes and parameters are equal + */ +bool signature_params_equal(signature_params_t *a, signature_params_t *b); + +/** + * Compare two signature schemes and their parameters + * + * @param c constraint + * @param s scheme + * @return TRUE if scheme complies to constraint + */ +bool signature_params_comply(signature_params_t *c, signature_params_t *s); + +/** + * Clone the given scheme and parameters, if any + * + * @return cloned object + */ +signature_params_t *signature_params_clone(signature_params_t *this); + +/** + * Destroy the given scheme and parameters, if any + */ +void signature_params_destroy(signature_params_t *this); + +/** + * Clear the given parameters, if any, sets the scheme to SIGN_UNKNOWN + */ +void signature_params_clear(signature_params_t *this); + +/** + * Parse an ASN.1 algorithmIdentifier with parameters denoting a signature + * scheme. + * + * @param asn1 ASN.1 encoded RSASSA-PSS-params + * @param level0 current level of the ASN.1 parser + * @param params parsed parameters + * @return TRUE if successfully parsed + */ +bool signature_params_parse(chunk_t asn1, int level0, + signature_params_t *params); + +/** + * Build ASN.1 algorithmIdentifier with parameters denoting a signature scheme. + * + * @param params signature scheme and parameters to encode + * @param asn1 ASN.1 encoded algorithmIdentifier (allocated) + * @return TRUE if successfully built + */ +bool signature_params_build(signature_params_t *params, chunk_t *asn1); + +/** + * Parameters for SIGN_RSA_EMSA_PSS signature scheme + */ +struct rsa_pss_params_t { + /** Hash algorithm */ + hash_algorithm_t hash; + /** Hash for the MGF1 function */ + hash_algorithm_t mgf1_hash; + /** Salt length, use RSA_PSS_SALT_LEN_DEFAULT for length equal to hash */ + ssize_t salt_len; + /** Salt value, for unit tests (not all implementations support this) */ + chunk_t salt; +#define RSA_PSS_SALT_LEN_DEFAULT -1 +}; + +/** + * Parse the given ASN.1 algorithm identifier params + * + * @param asn1 ASN.1 encoded RSASSA-PSS-params + * @param level0 current level of the ASN.1 parser + * @param params parsed parameters + * @return TRUE if successfully parsed + */ +bool rsa_pss_params_parse(chunk_t asn1, int level0, rsa_pss_params_t *params); + +/** + * Build ASN.1 algorithm identifier params + * + * @param params parameters to encode + * @param asn1 ASN.1 encoded RSASSA-PSS-params (allocated) + * @return TRUE if successfully built + */ +bool rsa_pss_params_build(rsa_pss_params_t *params, chunk_t *asn1); + +#endif /** SIGNATURE_PARAMS_H_ @}*/ |