Mercurial > dropbear
view libtomcrypt/src/pk/dsa/dsa_export.c @ 1887:30fd047f6ebf
Fix pytest incorrect skip "reason" string
No change to functionality
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Wed, 16 Mar 2022 17:32:43 +0800 (2022-03-16) |
parents | e9dba7abd939 |
children |
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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 dsa_export.c DSA implementation, export key, Tom St Denis */ #ifdef LTC_MDSA /** Export a DSA key to a binary packet @param out [out] Where to store the packet @param outlen [in/out] The max size and resulting size of the packet @param type The type of key to export (PK_PRIVATE or PK_PUBLIC) @param key The key to export @return CRYPT_OK if successful */ int dsa_export(unsigned char *out, unsigned long *outlen, int type, dsa_key *key) { unsigned long zero=0; int err, std; LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); LTC_ARGCHK(key != NULL); std = type & PK_STD; type &= ~PK_STD; /* can we store the static header? */ if (type == PK_PRIVATE && key->type != PK_PRIVATE) { return CRYPT_PK_TYPE_MISMATCH; } if (type != PK_PUBLIC && type != PK_PRIVATE) { return CRYPT_INVALID_ARG; } if (type == PK_PRIVATE) { if (std) { return der_encode_sequence_multi(out, outlen, LTC_ASN1_SHORT_INTEGER, 1UL, &zero, LTC_ASN1_INTEGER, 1UL, key->p, LTC_ASN1_INTEGER, 1UL, key->q, LTC_ASN1_INTEGER, 1UL, key->g, LTC_ASN1_INTEGER, 1UL, key->y, LTC_ASN1_INTEGER, 1UL, key->x, LTC_ASN1_EOL, 0UL, NULL); } else { unsigned char flags[1]; flags[0] = 1; return der_encode_sequence_multi(out, outlen, LTC_ASN1_BIT_STRING, 1UL, flags, LTC_ASN1_INTEGER, 1UL, key->g, LTC_ASN1_INTEGER, 1UL, key->p, LTC_ASN1_INTEGER, 1UL, key->q, LTC_ASN1_INTEGER, 1UL, key->y, LTC_ASN1_INTEGER, 1UL, key->x, LTC_ASN1_EOL, 0UL, NULL); } } else { if (std) { unsigned long tmplen = (unsigned long)(mp_count_bits(key->y) / 8) + 8; unsigned char* tmp = XMALLOC(tmplen); ltc_asn1_list int_list[3]; if (tmp == NULL) { return CRYPT_MEM; } err = der_encode_integer(key->y, tmp, &tmplen); if (err != CRYPT_OK) { goto error; } LTC_SET_ASN1(int_list, 0, LTC_ASN1_INTEGER, key->p, 1UL); LTC_SET_ASN1(int_list, 1, LTC_ASN1_INTEGER, key->q, 1UL); LTC_SET_ASN1(int_list, 2, LTC_ASN1_INTEGER, key->g, 1UL); err = der_encode_subject_public_key_info(out, outlen, PKA_DSA, tmp, tmplen, LTC_ASN1_SEQUENCE, int_list, sizeof(int_list) / sizeof(int_list[0])); error: XFREE(tmp); return err; } else { unsigned char flags[1]; flags[0] = 0; return der_encode_sequence_multi(out, outlen, LTC_ASN1_BIT_STRING, 1UL, flags, LTC_ASN1_INTEGER, 1UL, key->g, LTC_ASN1_INTEGER, 1UL, key->p, LTC_ASN1_INTEGER, 1UL, key->q, LTC_ASN1_INTEGER, 1UL, key->y, LTC_ASN1_EOL, 0UL, NULL); } } } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */