diff options
Diffstat (limited to 'src/util/cert/libcrypto/cert.c')
| -rw-r--r-- | src/util/cert/libcrypto/cert.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/util/cert/libcrypto/cert.c b/src/util/cert/libcrypto/cert.c new file mode 100644 index 000000000..1a250f60d --- /dev/null +++ b/src/util/cert/libcrypto/cert.c @@ -0,0 +1,168 @@ +/* + SSSD - certificate handling utils - openssl version + + Copyright (C) Sumit Bose <sbose@redhat.com> 2015 + + 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 3 of the License, or + (at your option) any later version. + + 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. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <openssl/x509.h> +#include <openssl/bio.h> +#include <openssl/pem.h> + +#include "util/util.h" + +errno_t sss_cert_der_to_pem(TALLOC_CTX *mem_ctx, const uint8_t *der_blob, + size_t der_size, char **pem, size_t *pem_size) +{ + X509 *x509 = NULL; + BIO *bio_mem = NULL; + const unsigned char *d; + int ret; + long p_size; + char *p; + + if (der_blob == NULL || der_size == 0) { + return EINVAL; + } + + d = (const unsigned char *) der_blob; + + x509 = d2i_X509(NULL, &d, (int) der_size); + if (x509 == NULL) { + DEBUG(SSSDBG_OP_FAILURE, "d2i_X509 failed.\n"); + return EINVAL; + } + + bio_mem = BIO_new(BIO_s_mem()); + if (bio_mem == NULL) { + DEBUG(SSSDBG_OP_FAILURE, "BIO_new failed.\n"); + ret = ENOMEM; + goto done; + } + + ret = PEM_write_bio_X509(bio_mem, x509); + if (ret != 1) { + DEBUG(SSSDBG_OP_FAILURE, "PEM_write_bio_X509 failed.\n"); + ret = EIO; + goto done; + } + + p_size = BIO_get_mem_data(bio_mem, &p); + if (p_size == 0) { + DEBUG(SSSDBG_OP_FAILURE, "Unexpected PEM size [%ld].\n", p_size); + ret = EINVAL; + goto done; + } + + if (pem != NULL) { + *pem = talloc_strndup(mem_ctx, p, p_size); + if (*pem == NULL) { + DEBUG(SSSDBG_OP_FAILURE, "talloc_memdup failed.\n"); + ret = ENOMEM; + goto done; + } + } + + if (pem_size != NULL) { + *pem_size = p_size; + } + + ret = EOK; + +done: + X509_free(x509); + BIO_free_all(bio_mem); + + return ret; +} + +errno_t sss_cert_pem_to_der(TALLOC_CTX *mem_ctx, const char *pem, + uint8_t **_der_blob, size_t *_der_size) +{ + X509 *x509 = NULL; + BIO *bio_mem = NULL; + int ret; + unsigned char *buf; + int buf_size; + uint8_t *der_blob; + size_t der_size; + + if (pem == NULL) { + return EINVAL; + } + + bio_mem = BIO_new(BIO_s_mem()); + if (bio_mem == NULL) { + DEBUG(SSSDBG_OP_FAILURE, "BIO_new failed.\n"); + ret = ENOMEM; + goto done; + } + + ret = BIO_puts(bio_mem, pem); + if (ret <= 0) { + DEBUG(SSSDBG_OP_FAILURE, "BIO_puts failed.\n"); + ret = EIO; + goto done; + } + + x509 = PEM_read_bio_X509(bio_mem, NULL, NULL, NULL); + if (x509 == NULL) { + DEBUG(SSSDBG_OP_FAILURE, "PEM_read_bio_X509 failed.\n"); + ret = EIO; + goto done; + } + + buf_size = i2d_X509(x509, NULL); + if (buf_size <= 0) { + DEBUG(SSSDBG_OP_FAILURE, "i2d_X509 failed.\n"); + ret = EIO; + goto done; + } + + if (_der_blob != NULL) { + buf = talloc_size(mem_ctx, buf_size); + if (buf == NULL) { + DEBUG(SSSDBG_OP_FAILURE, "talloc_size failed.\n"); + ret = ENOMEM; + goto done; + } + + der_blob = buf; + + der_size = i2d_X509(x509, &buf); + if (der_size != buf_size) { + talloc_free(der_blob); + DEBUG(SSSDBG_CRIT_FAILURE, + "i2d_X509 size mismatch between two calls.\n"); + ret = EIO; + goto done; + } + + *_der_blob = der_blob; + } + + if (_der_size != NULL) { + *_der_size = buf_size; + } + + ret = EOK; + +done: + X509_free(x509); + BIO_free_all(bio_mem); + + return ret; + +} |