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[zpackage] / libtomcrypt / src / pk / asn1 / der / sequence / der_encode_subject_public_key_info.c

diff --git a/libtomcrypt/src/pk/asn1/der/sequence/der_encode_subject_public_key_info.c b/libtomcrypt/src/pk/asn1/der/sequence/der_encode_subject_public_key_info.c
new file mode 100644 (file)
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+++ b/libtomcrypt/src/pk/asn1/der/sequence/der_encode_subject_public_key_info.c
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+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+  @file der_encode_subject_public_key_info.c
+  ASN.1 DER, encode a Subject Public Key structure --nmav
+*/
+
+#ifdef LTC_DER
+
+/* AlgorithmIdentifier := SEQUENCE {
+ *    algorithm OBJECT IDENTIFIER,
+ *    parameters ANY DEFINED BY algorithm
+ * }
+ *
+ * SubjectPublicKeyInfo := SEQUENCE {
+ *    algorithm AlgorithmIdentifier,
+ *    subjectPublicKey BIT STRING
+ * }
+ */
+/**
+  Encode a subject public key info
+   @param out           The output buffer
+   @param outlen        [in/out] Length of buffer and resulting length of output
+   @param algorithm             One out of the enum #public_key_algorithms
+   @param public_key            The buffer for the public key
+   @param public_key_len        The length of the public key buffer
+   @param parameters_type       The parameters' type out of the enum ltc_asn1_type
+   @param parameters            The parameters to include
+   @param parameters_len        The number of parameters to include
+   @return CRYPT_OK on success
+*/
+int der_encode_subject_public_key_info(unsigned char *out, unsigned long *outlen,
+        unsigned int algorithm, void* public_key, unsigned long public_key_len,
+        unsigned long parameters_type, void* parameters, unsigned long parameters_len)
+{
+   int           err;
+   ltc_asn1_list alg_id[2];
+   oid_st oid;
+
+   LTC_ARGCHK(out    != NULL);
+   LTC_ARGCHK(outlen != NULL);
+
+   err = pk_get_oid(algorithm, &oid);
+   if (err != CRYPT_OK) {
+        return err;
+   }
+
+   LTC_SET_ASN1(alg_id, 0, LTC_ASN1_OBJECT_IDENTIFIER, oid.OID,    oid.OIDlen);
+   LTC_SET_ASN1(alg_id, 1, (ltc_asn1_type)parameters_type,            parameters, parameters_len);
+
+   return der_encode_sequence_multi(out, outlen,
+        LTC_ASN1_SEQUENCE, (unsigned long)sizeof(alg_id)/sizeof(alg_id[0]), alg_id,
+        LTC_ASN1_RAW_BIT_STRING, public_key_len*8U, public_key,
+        LTC_ASN1_EOL,     0UL, NULL);
+
+}
+
+#endif
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */
+