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gpgsm: Some more ECC support backported.
* sm/certcheck.c (gpgsm_check_cert_sig): Map ECDSA OIDs. * sm/misc.c (transform_sigval): Add ECC support. -- GnuPG-bug-id: 6253
This commit is contained in:
Werner Koch
parent
3f845c8de7
commit
266a6602f0
@ -357,9 +357,19 @@ gpgsm_check_cert_sig (ksba_cert_t issuer_cert, ksba_cert_t cert)
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int use_pss = 0;
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unsigned int saltlen;
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/* Note that we map the 4 algos which current Libgcrypt versions are
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* not aware of the OID. */
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algo = gcry_md_map_name ( (algoid=ksba_cert_get_digest_algo (cert)));
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if (!algo && algoid && !strcmp (algoid, "1.2.840.113549.1.1.10"))
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use_pss = 1;
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else if (!algo && algoid && !strcmp (algoid, "1.2.840.10045.4.3.1"))
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algo = GCRY_MD_SHA224; /* ecdsa-with-sha224 */
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else if (!algo && algoid && !strcmp (algoid, "1.2.840.10045.4.3.2"))
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algo = GCRY_MD_SHA256; /* ecdsa-with-sha256 */
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else if (!algo && algoid && !strcmp (algoid, "1.2.840.10045.4.3.3"))
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algo = GCRY_MD_SHA384; /* ecdsa-with-sha384 */
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else if (!algo && algoid && !strcmp (algoid, "1.2.840.10045.4.3.4"))
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algo = GCRY_MD_SHA512; /* ecdsa-with-sha512 */
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else if (!algo)
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{
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log_error ("unknown digest algorithm '%s' used certificate\n",
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109
sm/misc.c
109
sm/misc.c
@ -101,7 +101,7 @@ setup_pinentry_env (void)
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function ignores missing parameters so that it can also be used to
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create an siginfo value as expected by ksba_certreq_set_siginfo.
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To create a siginfo s-expression a public-key s-expression may be
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used instead of a sig-val. We only support RSA for now. */
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used instead of a sig-val. */
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gpg_error_t
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transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
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unsigned char **r_newsigval, size_t *r_newsigvallen)
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@ -111,11 +111,15 @@ transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
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size_t buflen, toklen;
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int depth, last_depth1, last_depth2;
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int is_pubkey = 0;
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const unsigned char *rsa_s = NULL;
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size_t rsa_s_len = 0;
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int pkalgo;
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const unsigned char *rsa_s, *ecc_r, *ecc_s;
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size_t rsa_s_len, ecc_r_len, ecc_s_len;
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const char *oid;
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gcry_sexp_t sexp;
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rsa_s = ecc_r = ecc_s = NULL;
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rsa_s_len = ecc_r_len = ecc_s_len = 0;
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*r_newsigval = NULL;
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if (r_newsigvallen)
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*r_newsigvallen = 0;
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@ -137,7 +141,15 @@ transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
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return err;
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if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
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return err;
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if (!tok || toklen != 3 || memcmp ("rsa", tok, toklen))
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if (!tok)
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return gpg_error (GPG_ERR_WRONG_PUBKEY_ALGO);
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if (toklen == 3 && !memcmp ("rsa", tok, 3))
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pkalgo = GCRY_PK_RSA;
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else if (toklen == 3 && !memcmp ("ecc", tok, 3))
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pkalgo = GCRY_PK_ECC;
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else if (toklen == 5 && !memcmp ("ecdsa", tok, 5))
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pkalgo = GCRY_PK_ECC;
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else
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return gpg_error (GPG_ERR_WRONG_PUBKEY_ALGO);
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last_depth1 = depth;
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@ -150,8 +162,8 @@ transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
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return err;
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if (tok && toklen == 1)
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{
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const unsigned char **mpi;
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size_t *mpi_len;
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const unsigned char **mpi = NULL;
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size_t *mpi_len = NULL;
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switch (*tok)
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{
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@ -161,6 +173,25 @@ transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
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if (mpi && *mpi)
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return gpg_error (GPG_ERR_DUP_VALUE);
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switch (*tok)
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{
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case 's':
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if (pkalgo == GCRY_PK_RSA)
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{
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mpi = &rsa_s;
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mpi_len = &rsa_s_len;
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}
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else if (pkalgo == GCRY_PK_ECC || pkalgo == GCRY_PK_EDDSA)
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{
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mpi = &ecc_s;
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mpi_len = &ecc_s_len;
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}
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break;
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case 'r': mpi = &ecc_r; mpi_len = &ecc_r_len; break;
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default: mpi = NULL; mpi_len = NULL; break;
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}
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if ((err = parse_sexp (&buf, &buflen, &depth, &tok, &toklen)))
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return err;
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if (tok && mpi)
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@ -181,34 +212,62 @@ transform_sigval (const unsigned char *sigval, size_t sigvallen, int mdalgo,
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if (err)
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return err;
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/* Map the hash algorithm to an OID. */
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switch (mdalgo)
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if (0)
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; /* Just to align it with the code in 2.3. */
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else
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{
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case GCRY_MD_SHA1:
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oid = "1.2.840.113549.1.1.5"; /* sha1WithRSAEncryption */
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break;
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/* Map the hash algorithm to an OID. */
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if (mdalgo < 0 || mdalgo > (1<<15) || pkalgo < 0 || pkalgo > (1<<15))
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return gpg_error (GPG_ERR_DIGEST_ALGO);
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case GCRY_MD_SHA256:
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oid = "1.2.840.113549.1.1.11"; /* sha256WithRSAEncryption */
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break;
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switch (mdalgo | (pkalgo << 16))
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{
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case GCRY_MD_SHA1 | (GCRY_PK_RSA << 16):
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oid = "1.2.840.113549.1.1.5"; /* sha1WithRSAEncryption */
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break;
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case GCRY_MD_SHA384:
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oid = "1.2.840.113549.1.1.12"; /* sha384WithRSAEncryption */
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break;
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case GCRY_MD_SHA256 | (GCRY_PK_RSA << 16):
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oid = "1.2.840.113549.1.1.11"; /* sha256WithRSAEncryption */
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break;
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case GCRY_MD_SHA512:
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oid = "1.2.840.113549.1.1.13"; /* sha512WithRSAEncryption */
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break;
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case GCRY_MD_SHA384 | (GCRY_PK_RSA << 16):
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oid = "1.2.840.113549.1.1.12"; /* sha384WithRSAEncryption */
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break;
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default:
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return gpg_error (GPG_ERR_DIGEST_ALGO);
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case GCRY_MD_SHA512 | (GCRY_PK_RSA << 16):
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oid = "1.2.840.113549.1.1.13"; /* sha512WithRSAEncryption */
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break;
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case GCRY_MD_SHA224 | (GCRY_PK_ECC << 16):
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oid = "1.2.840.10045.4.3.1"; /* ecdsa-with-sha224 */
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break;
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case GCRY_MD_SHA256 | (GCRY_PK_ECC << 16):
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oid = "1.2.840.10045.4.3.2"; /* ecdsa-with-sha256 */
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break;
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case GCRY_MD_SHA384 | (GCRY_PK_ECC << 16):
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oid = "1.2.840.10045.4.3.3"; /* ecdsa-with-sha384 */
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break;
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case GCRY_MD_SHA512 | (GCRY_PK_ECC << 16):
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oid = "1.2.840.10045.4.3.4"; /* ecdsa-with-sha512 */
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break;
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default:
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return gpg_error (GPG_ERR_DIGEST_ALGO);
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}
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}
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if (rsa_s && !is_pubkey)
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if (is_pubkey)
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err = gcry_sexp_build (&sexp, NULL, "(sig-val(%s))", oid);
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else if (pkalgo == GCRY_PK_RSA)
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err = gcry_sexp_build (&sexp, NULL, "(sig-val(%s(s%b)))",
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oid, (int)rsa_s_len, rsa_s);
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else
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err = gcry_sexp_build (&sexp, NULL, "(sig-val(%s))", oid);
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else if (pkalgo == GCRY_PK_ECC || pkalgo == GCRY_PK_EDDSA)
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err = gcry_sexp_build (&sexp, NULL, "(sig-val(%s(r%b)(s%b)))", oid,
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(int)ecc_r_len, ecc_r, (int)ecc_s_len, ecc_s);
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if (err)
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return err;
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err = make_canon_sexp (sexp, r_newsigval, r_newsigvallen);
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